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6985 lines
208 KiB
JavaScript
Executable File
6985 lines
208 KiB
JavaScript
Executable File
// rev 452
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/********************************************************************************
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* *
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* Author : Angus Johnson *
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* Version : 6.1.3a *
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* Date : 22 January 2014 *
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* Website : http://www.angusj.com *
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* Copyright : Angus Johnson 2010-2014 *
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* *
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* License: *
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* Use, modification & distribution is subject to Boost Software License Ver 1. *
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* http://www.boost.org/LICENSE_1_0.txt *
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* *
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* Attributions: *
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* The code in this library is an extension of Bala Vatti's clipping algorithm: *
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* "A generic solution to polygon clipping" *
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* Communications of the ACM, Vol 35, Issue 7 (July 1992) pp 56-63. *
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* http://portal.acm.org/citation.cfm?id=129906 *
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* *
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* Computer graphics and geometric modeling: implementation and algorithms *
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* By Max K. Agoston *
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* Springer; 1 edition (January 4, 2005) *
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* http://books.google.com/books?q=vatti+clipping+agoston *
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* *
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* See also: *
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* "Polygon Offsetting by Computing Winding Numbers" *
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* Paper no. DETC2005-85513 pp. 565-575 *
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* ASME 2005 International Design Engineering Technical Conferences *
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* and Computers and Information in Engineering Conference (IDETC/CIE2005) *
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* September 24-28, 2005 , Long Beach, California, USA *
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* http://www.me.berkeley.edu/~mcmains/pubs/DAC05OffsetPolygon.pdf *
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* *
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*******************************************************************************/
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/*******************************************************************************
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* *
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* Author : Timo *
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* Version : 6.1.3.2 *
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* Date : 1 February 2014 *
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* *
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* This is a translation of the C# Clipper library to Javascript. *
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* Int128 struct of C# is implemented using JSBN of Tom Wu. *
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* Because Javascript lacks support for 64-bit integers, the space *
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* is a little more restricted than in C# version. *
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* *
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* C# version has support for coordinate space: *
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* +-4611686018427387903 ( sqrt(2^127 -1)/2 ) *
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* while Javascript version has support for space: *
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* +-4503599627370495 ( sqrt(2^106 -1)/2 ) *
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* *
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* Tom Wu's JSBN proved to be the fastest big integer library: *
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* http://jsperf.com/big-integer-library-test *
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* *
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* This class can be made simpler when (if ever) 64-bit integer support comes. *
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* *
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*******************************************************************************/
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/*******************************************************************************
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* *
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* Basic JavaScript BN library - subset useful for RSA encryption. *
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* http://www-cs-students.stanford.edu/~tjw/jsbn/ *
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* Copyright (c) 2005 Tom Wu *
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* All Rights Reserved. *
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* See "LICENSE" for details: *
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* http://www-cs-students.stanford.edu/~tjw/jsbn/LICENSE *
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* *
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*******************************************************************************/
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(function ()
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{
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"use strict";
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//use_int32: When enabled 32bit ints are used instead of 64bit ints. This
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//improve performance but coordinate values are limited to the range +/- 46340
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var use_int32 = false;
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//use_xyz: adds a Z member to IntPoint. Adds a minor cost to performance.
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var use_xyz = false;
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//UseLines: Enables line clipping. Adds a very minor cost to performance.
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var use_lines = true;
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//use_deprecated: Enables support for the obsolete OffsetPaths() function
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//which has been replace with the ClipperOffset class.
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var use_deprecated = false;
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var ClipperLib = {};
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var isNode = false;
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if (typeof module !== 'undefined' && module.exports)
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{
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module.exports = ClipperLib;
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isNode = true;
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}
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else
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{
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if (typeof (document) !== "undefined") window.ClipperLib = ClipperLib;
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else self['ClipperLib'] = ClipperLib;
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}
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var navigator_appName;
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if (!isNode)
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{
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var nav = navigator.userAgent.toString().toLowerCase();
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navigator_appName = navigator.appName;
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}
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else
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{
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var nav = "chrome"; // Node.js uses Chrome's V8 engine
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navigator_appName = "Netscape"; // Firefox, Chrome and Safari returns "Netscape", so Node.js should also
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}
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// Browser test to speedup performance critical functions
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var browser = {};
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if (nav.indexOf("chrome") != -1 && nav.indexOf("chromium") == -1) browser.chrome = 1;
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else browser.chrome = 0;
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if (nav.indexOf("chromium") != -1) browser.chromium = 1;
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else browser.chromium = 0;
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if (nav.indexOf("safari") != -1 && nav.indexOf("chrome") == -1 && nav.indexOf("chromium") == -1) browser.safari = 1;
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else browser.safari = 0;
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if (nav.indexOf("firefox") != -1) browser.firefox = 1;
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else browser.firefox = 0;
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if (nav.indexOf("firefox/17") != -1) browser.firefox17 = 1;
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else browser.firefox17 = 0;
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if (nav.indexOf("firefox/15") != -1) browser.firefox15 = 1;
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else browser.firefox15 = 0;
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if (nav.indexOf("firefox/3") != -1) browser.firefox3 = 1;
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else browser.firefox3 = 0;
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if (nav.indexOf("opera") != -1) browser.opera = 1;
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else browser.opera = 0;
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if (nav.indexOf("msie 10") != -1) browser.msie10 = 1;
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else browser.msie10 = 0;
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if (nav.indexOf("msie 9") != -1) browser.msie9 = 1;
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else browser.msie9 = 0;
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if (nav.indexOf("msie 8") != -1) browser.msie8 = 1;
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else browser.msie8 = 0;
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if (nav.indexOf("msie 7") != -1) browser.msie7 = 1;
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else browser.msie7 = 0;
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if (nav.indexOf("msie ") != -1) browser.msie = 1;
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else browser.msie = 0;
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ClipperLib.biginteger_used = null;
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// Copyright (c) 2005 Tom Wu
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// All Rights Reserved.
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// See "LICENSE" for details.
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// Basic JavaScript BN library - subset useful for RSA encryption.
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// Bits per digit
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var dbits;
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// JavaScript engine analysis
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var canary = 0xdeadbeefcafe;
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var j_lm = ((canary & 0xffffff) == 0xefcafe);
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// (public) Constructor
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function BigInteger(a, b, c)
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{
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// This test variable can be removed,
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// but at least for performance tests it is useful piece of knowledge
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// This is the only ClipperLib related variable in BigInteger library
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ClipperLib.biginteger_used = 1;
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if (a != null)
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if ("number" == typeof a && "undefined" == typeof (b)) this.fromInt(a); // faster conversion
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else if ("number" == typeof a) this.fromNumber(a, b, c);
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else if (b == null && "string" != typeof a) this.fromString(a, 256);
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else this.fromString(a, b);
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}
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// return new, unset BigInteger
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function nbi()
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{
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return new BigInteger(null);
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}
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// am: Compute w_j += (x*this_i), propagate carries,
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// c is initial carry, returns final carry.
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// c < 3*dvalue, x < 2*dvalue, this_i < dvalue
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// We need to select the fastest one that works in this environment.
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// am1: use a single mult and divide to get the high bits,
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// max digit bits should be 26 because
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// max internal value = 2*dvalue^2-2*dvalue (< 2^53)
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function am1(i, x, w, j, c, n)
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{
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while (--n >= 0)
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{
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var v = x * this[i++] + w[j] + c;
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c = Math.floor(v / 0x4000000);
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w[j++] = v & 0x3ffffff;
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}
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return c;
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}
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// am2 avoids a big mult-and-extract completely.
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// Max digit bits should be <= 30 because we do bitwise ops
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// on values up to 2*hdvalue^2-hdvalue-1 (< 2^31)
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function am2(i, x, w, j, c, n)
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{
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var xl = x & 0x7fff,
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xh = x >> 15;
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while (--n >= 0)
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{
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var l = this[i] & 0x7fff;
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var h = this[i++] >> 15;
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var m = xh * l + h * xl;
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l = xl * l + ((m & 0x7fff) << 15) + w[j] + (c & 0x3fffffff);
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c = (l >>> 30) + (m >>> 15) + xh * h + (c >>> 30);
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w[j++] = l & 0x3fffffff;
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}
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return c;
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}
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// Alternately, set max digit bits to 28 since some
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// browsers slow down when dealing with 32-bit numbers.
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function am3(i, x, w, j, c, n)
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{
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var xl = x & 0x3fff,
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xh = x >> 14;
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while (--n >= 0)
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{
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var l = this[i] & 0x3fff;
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var h = this[i++] >> 14;
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var m = xh * l + h * xl;
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l = xl * l + ((m & 0x3fff) << 14) + w[j] + c;
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c = (l >> 28) + (m >> 14) + xh * h;
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w[j++] = l & 0xfffffff;
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}
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return c;
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}
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if (j_lm && (navigator_appName == "Microsoft Internet Explorer"))
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{
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BigInteger.prototype.am = am2;
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dbits = 30;
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}
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else if (j_lm && (navigator_appName != "Netscape"))
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{
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BigInteger.prototype.am = am1;
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dbits = 26;
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}
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else
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{ // Mozilla/Netscape seems to prefer am3
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BigInteger.prototype.am = am3;
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dbits = 28;
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}
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BigInteger.prototype.DB = dbits;
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BigInteger.prototype.DM = ((1 << dbits) - 1);
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BigInteger.prototype.DV = (1 << dbits);
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var BI_FP = 52;
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BigInteger.prototype.FV = Math.pow(2, BI_FP);
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BigInteger.prototype.F1 = BI_FP - dbits;
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BigInteger.prototype.F2 = 2 * dbits - BI_FP;
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// Digit conversions
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var BI_RM = "0123456789abcdefghijklmnopqrstuvwxyz";
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var BI_RC = new Array();
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var rr, vv;
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rr = "0".charCodeAt(0);
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for (vv = 0; vv <= 9; ++vv) BI_RC[rr++] = vv;
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rr = "a".charCodeAt(0);
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for (vv = 10; vv < 36; ++vv) BI_RC[rr++] = vv;
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rr = "A".charCodeAt(0);
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for (vv = 10; vv < 36; ++vv) BI_RC[rr++] = vv;
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function int2char(n)
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{
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return BI_RM.charAt(n);
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}
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function intAt(s, i)
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{
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var c = BI_RC[s.charCodeAt(i)];
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return (c == null) ? -1 : c;
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}
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// (protected) copy this to r
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function bnpCopyTo(r)
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{
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for (var i = this.t - 1; i >= 0; --i) r[i] = this[i];
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r.t = this.t;
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r.s = this.s;
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}
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// (protected) set from integer value x, -DV <= x < DV
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function bnpFromInt(x)
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{
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this.t = 1;
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this.s = (x < 0) ? -1 : 0;
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if (x > 0) this[0] = x;
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else if (x < -1) this[0] = x + this.DV;
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else this.t = 0;
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}
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// return bigint initialized to value
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function nbv(i)
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{
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var r = nbi();
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r.fromInt(i);
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return r;
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}
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// (protected) set from string and radix
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function bnpFromString(s, b)
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{
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var k;
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if (b == 16) k = 4;
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else if (b == 8) k = 3;
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else if (b == 256) k = 8; // byte array
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else if (b == 2) k = 1;
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else if (b == 32) k = 5;
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else if (b == 4) k = 2;
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else
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{
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this.fromRadix(s, b);
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return;
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}
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this.t = 0;
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this.s = 0;
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var i = s.length,
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mi = false,
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sh = 0;
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while (--i >= 0)
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{
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var x = (k == 8) ? s[i] & 0xff : intAt(s, i);
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if (x < 0)
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{
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if (s.charAt(i) == "-") mi = true;
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continue;
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}
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mi = false;
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if (sh == 0)
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this[this.t++] = x;
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else if (sh + k > this.DB)
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{
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this[this.t - 1] |= (x & ((1 << (this.DB - sh)) - 1)) << sh;
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this[this.t++] = (x >> (this.DB - sh));
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}
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else
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this[this.t - 1] |= x << sh;
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sh += k;
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if (sh >= this.DB) sh -= this.DB;
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}
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if (k == 8 && (s[0] & 0x80) != 0)
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{
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this.s = -1;
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if (sh > 0) this[this.t - 1] |= ((1 << (this.DB - sh)) - 1) << sh;
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}
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this.clamp();
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if (mi) BigInteger.ZERO.subTo(this, this);
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}
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// (protected) clamp off excess high words
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function bnpClamp()
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{
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var c = this.s & this.DM;
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while (this.t > 0 && this[this.t - 1] == c)--this.t;
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}
|
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// (public) return string representation in given radix
|
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function bnToString(b)
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{
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if (this.s < 0) return "-" + this.negate().toString(b);
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var k;
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if (b == 16) k = 4;
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else if (b == 8) k = 3;
|
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else if (b == 2) k = 1;
|
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else if (b == 32) k = 5;
|
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else if (b == 4) k = 2;
|
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else return this.toRadix(b);
|
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var km = (1 << k) - 1,
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d, m = false,
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r = "",
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i = this.t;
|
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var p = this.DB - (i * this.DB) % k;
|
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if (i-- > 0)
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{
|
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if (p < this.DB && (d = this[i] >> p) > 0)
|
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{
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m = true;
|
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r = int2char(d);
|
|
}
|
|
while (i >= 0)
|
|
{
|
|
if (p < k)
|
|
{
|
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d = (this[i] & ((1 << p) - 1)) << (k - p);
|
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d |= this[--i] >> (p += this.DB - k);
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}
|
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else
|
|
{
|
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d = (this[i] >> (p -= k)) & km;
|
|
if (p <= 0)
|
|
{
|
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p += this.DB;
|
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--i;
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}
|
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}
|
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if (d > 0) m = true;
|
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if (m) r += int2char(d);
|
|
}
|
|
}
|
|
return m ? r : "0";
|
|
}
|
|
// (public) -this
|
|
function bnNegate()
|
|
{
|
|
var r = nbi();
|
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BigInteger.ZERO.subTo(this, r);
|
|
return r;
|
|
}
|
|
// (public) |this|
|
|
function bnAbs()
|
|
{
|
|
return (this.s < 0) ? this.negate() : this;
|
|
}
|
|
// (public) return + if this > a, - if this < a, 0 if equal
|
|
function bnCompareTo(a)
|
|
{
|
|
var r = this.s - a.s;
|
|
if (r != 0) return r;
|
|
var i = this.t;
|
|
r = i - a.t;
|
|
if (r != 0) return (this.s < 0) ? -r : r;
|
|
while (--i >= 0)
|
|
if ((r = this[i] - a[i]) != 0) return r;
|
|
return 0;
|
|
}
|
|
// returns bit length of the integer x
|
|
function nbits(x)
|
|
{
|
|
var r = 1,
|
|
t;
|
|
if ((t = x >>> 16) != 0)
|
|
{
|
|
x = t;
|
|
r += 16;
|
|
}
|
|
if ((t = x >> 8) != 0)
|
|
{
|
|
x = t;
|
|
r += 8;
|
|
}
|
|
if ((t = x >> 4) != 0)
|
|
{
|
|
x = t;
|
|
r += 4;
|
|
}
|
|
if ((t = x >> 2) != 0)
|
|
{
|
|
x = t;
|
|
r += 2;
|
|
}
|
|
if ((t = x >> 1) != 0)
|
|
{
|
|
x = t;
|
|
r += 1;
|
|
}
|
|
return r;
|
|
}
|
|
// (public) return the number of bits in "this"
|
|
function bnBitLength()
|
|
{
|
|
if (this.t <= 0) return 0;
|
|
return this.DB * (this.t - 1) + nbits(this[this.t - 1] ^ (this.s & this.DM));
|
|
}
|
|
// (protected) r = this << n*DB
|
|
function bnpDLShiftTo(n, r)
|
|
{
|
|
var i;
|
|
for (i = this.t - 1; i >= 0; --i) r[i + n] = this[i];
|
|
for (i = n - 1; i >= 0; --i) r[i] = 0;
|
|
r.t = this.t + n;
|
|
r.s = this.s;
|
|
}
|
|
// (protected) r = this >> n*DB
|
|
function bnpDRShiftTo(n, r)
|
|
{
|
|
for (var i = n; i < this.t; ++i) r[i - n] = this[i];
|
|
r.t = Math.max(this.t - n, 0);
|
|
r.s = this.s;
|
|
}
|
|
// (protected) r = this << n
|
|
function bnpLShiftTo(n, r)
|
|
{
|
|
var bs = n % this.DB;
|
|
var cbs = this.DB - bs;
|
|
var bm = (1 << cbs) - 1;
|
|
var ds = Math.floor(n / this.DB),
|
|
c = (this.s << bs) & this.DM,
|
|
i;
|
|
for (i = this.t - 1; i >= 0; --i)
|
|
{
|
|
r[i + ds + 1] = (this[i] >> cbs) | c;
|
|
c = (this[i] & bm) << bs;
|
|
}
|
|
for (i = ds - 1; i >= 0; --i) r[i] = 0;
|
|
r[ds] = c;
|
|
r.t = this.t + ds + 1;
|
|
r.s = this.s;
|
|
r.clamp();
|
|
}
|
|
// (protected) r = this >> n
|
|
function bnpRShiftTo(n, r)
|
|
{
|
|
r.s = this.s;
|
|
var ds = Math.floor(n / this.DB);
|
|
if (ds >= this.t)
|
|
{
|
|
r.t = 0;
|
|
return;
|
|
}
|
|
var bs = n % this.DB;
|
|
var cbs = this.DB - bs;
|
|
var bm = (1 << bs) - 1;
|
|
r[0] = this[ds] >> bs;
|
|
for (var i = ds + 1; i < this.t; ++i)
|
|
{
|
|
r[i - ds - 1] |= (this[i] & bm) << cbs;
|
|
r[i - ds] = this[i] >> bs;
|
|
}
|
|
if (bs > 0) r[this.t - ds - 1] |= (this.s & bm) << cbs;
|
|
r.t = this.t - ds;
|
|
r.clamp();
|
|
}
|
|
// (protected) r = this - a
|
|
function bnpSubTo(a, r)
|
|
{
|
|
var i = 0,
|
|
c = 0,
|
|
m = Math.min(a.t, this.t);
|
|
while (i < m)
|
|
{
|
|
c += this[i] - a[i];
|
|
r[i++] = c & this.DM;
|
|
c >>= this.DB;
|
|
}
|
|
if (a.t < this.t)
|
|
{
|
|
c -= a.s;
|
|
while (i < this.t)
|
|
{
|
|
c += this[i];
|
|
r[i++] = c & this.DM;
|
|
c >>= this.DB;
|
|
}
|
|
c += this.s;
|
|
}
|
|
else
|
|
{
|
|
c += this.s;
|
|
while (i < a.t)
|
|
{
|
|
c -= a[i];
|
|
r[i++] = c & this.DM;
|
|
c >>= this.DB;
|
|
}
|
|
c -= a.s;
|
|
}
|
|
r.s = (c < 0) ? -1 : 0;
|
|
if (c < -1) r[i++] = this.DV + c;
|
|
else if (c > 0) r[i++] = c;
|
|
r.t = i;
|
|
r.clamp();
|
|
}
|
|
// (protected) r = this * a, r != this,a (HAC 14.12)
|
|
// "this" should be the larger one if appropriate.
|
|
function bnpMultiplyTo(a, r)
|
|
{
|
|
var x = this.abs(),
|
|
y = a.abs();
|
|
var i = x.t;
|
|
r.t = i + y.t;
|
|
while (--i >= 0) r[i] = 0;
|
|
for (i = 0; i < y.t; ++i) r[i + x.t] = x.am(0, y[i], r, i, 0, x.t);
|
|
r.s = 0;
|
|
r.clamp();
|
|
if (this.s != a.s) BigInteger.ZERO.subTo(r, r);
|
|
}
|
|
// (protected) r = this^2, r != this (HAC 14.16)
|
|
function bnpSquareTo(r)
|
|
{
|
|
var x = this.abs();
|
|
var i = r.t = 2 * x.t;
|
|
while (--i >= 0) r[i] = 0;
|
|
for (i = 0; i < x.t - 1; ++i)
|
|
{
|
|
var c = x.am(i, x[i], r, 2 * i, 0, 1);
|
|
if ((r[i + x.t] += x.am(i + 1, 2 * x[i], r, 2 * i + 1, c, x.t - i - 1)) >= x.DV)
|
|
{
|
|
r[i + x.t] -= x.DV;
|
|
r[i + x.t + 1] = 1;
|
|
}
|
|
}
|
|
if (r.t > 0) r[r.t - 1] += x.am(i, x[i], r, 2 * i, 0, 1);
|
|
r.s = 0;
|
|
r.clamp();
|
|
}
|
|
// (protected) divide this by m, quotient and remainder to q, r (HAC 14.20)
|
|
// r != q, this != m. q or r may be null.
|
|
function bnpDivRemTo(m, q, r)
|
|
{
|
|
var pm = m.abs();
|
|
if (pm.t <= 0) return;
|
|
var pt = this.abs();
|
|
if (pt.t < pm.t)
|
|
{
|
|
if (q != null) q.fromInt(0);
|
|
if (r != null) this.copyTo(r);
|
|
return;
|
|
}
|
|
if (r == null) r = nbi();
|
|
var y = nbi(),
|
|
ts = this.s,
|
|
ms = m.s;
|
|
var nsh = this.DB - nbits(pm[pm.t - 1]); // normalize modulus
|
|
if (nsh > 0)
|
|
{
|
|
pm.lShiftTo(nsh, y);
|
|
pt.lShiftTo(nsh, r);
|
|
}
|
|
else
|
|
{
|
|
pm.copyTo(y);
|
|
pt.copyTo(r);
|
|
}
|
|
var ys = y.t;
|
|
var y0 = y[ys - 1];
|
|
if (y0 == 0) return;
|
|
var yt = y0 * (1 << this.F1) + ((ys > 1) ? y[ys - 2] >> this.F2 : 0);
|
|
var d1 = this.FV / yt,
|
|
d2 = (1 << this.F1) / yt,
|
|
e = 1 << this.F2;
|
|
var i = r.t,
|
|
j = i - ys,
|
|
t = (q == null) ? nbi() : q;
|
|
y.dlShiftTo(j, t);
|
|
if (r.compareTo(t) >= 0)
|
|
{
|
|
r[r.t++] = 1;
|
|
r.subTo(t, r);
|
|
}
|
|
BigInteger.ONE.dlShiftTo(ys, t);
|
|
t.subTo(y, y); // "negative" y so we can replace sub with am later
|
|
while (y.t < ys) y[y.t++] = 0;
|
|
while (--j >= 0)
|
|
{
|
|
// Estimate quotient digit
|
|
var qd = (r[--i] == y0) ? this.DM : Math.floor(r[i] * d1 + (r[i - 1] + e) * d2);
|
|
if ((r[i] += y.am(0, qd, r, j, 0, ys)) < qd)
|
|
{ // Try it out
|
|
y.dlShiftTo(j, t);
|
|
r.subTo(t, r);
|
|
while (r[i] < --qd) r.subTo(t, r);
|
|
}
|
|
}
|
|
if (q != null)
|
|
{
|
|
r.drShiftTo(ys, q);
|
|
if (ts != ms) BigInteger.ZERO.subTo(q, q);
|
|
}
|
|
r.t = ys;
|
|
r.clamp();
|
|
if (nsh > 0) r.rShiftTo(nsh, r); // Denormalize remainder
|
|
if (ts < 0) BigInteger.ZERO.subTo(r, r);
|
|
}
|
|
// (public) this mod a
|
|
function bnMod(a)
|
|
{
|
|
var r = nbi();
|
|
this.abs().divRemTo(a, null, r);
|
|
if (this.s < 0 && r.compareTo(BigInteger.ZERO) > 0) a.subTo(r, r);
|
|
return r;
|
|
}
|
|
// Modular reduction using "classic" algorithm
|
|
function Classic(m)
|
|
{
|
|
this.m = m;
|
|
}
|
|
|
|
function cConvert(x)
|
|
{
|
|
if (x.s < 0 || x.compareTo(this.m) >= 0) return x.mod(this.m);
|
|
else return x;
|
|
}
|
|
|
|
function cRevert(x)
|
|
{
|
|
return x;
|
|
}
|
|
|
|
function cReduce(x)
|
|
{
|
|
x.divRemTo(this.m, null, x);
|
|
}
|
|
|
|
function cMulTo(x, y, r)
|
|
{
|
|
x.multiplyTo(y, r);
|
|
this.reduce(r);
|
|
}
|
|
|
|
function cSqrTo(x, r)
|
|
{
|
|
x.squareTo(r);
|
|
this.reduce(r);
|
|
}
|
|
Classic.prototype.convert = cConvert;
|
|
Classic.prototype.revert = cRevert;
|
|
Classic.prototype.reduce = cReduce;
|
|
Classic.prototype.mulTo = cMulTo;
|
|
Classic.prototype.sqrTo = cSqrTo;
|
|
// (protected) return "-1/this % 2^DB"; useful for Mont. reduction
|
|
// justification:
|
|
// xy == 1 (mod m)
|
|
// xy = 1+km
|
|
// xy(2-xy) = (1+km)(1-km)
|
|
// x[y(2-xy)] = 1-k^2m^2
|
|
// x[y(2-xy)] == 1 (mod m^2)
|
|
// if y is 1/x mod m, then y(2-xy) is 1/x mod m^2
|
|
// should reduce x and y(2-xy) by m^2 at each step to keep size bounded.
|
|
// JS multiply "overflows" differently from C/C++, so care is needed here.
|
|
function bnpInvDigit()
|
|
{
|
|
if (this.t < 1) return 0;
|
|
var x = this[0];
|
|
if ((x & 1) == 0) return 0;
|
|
var y = x & 3; // y == 1/x mod 2^2
|
|
y = (y * (2 - (x & 0xf) * y)) & 0xf; // y == 1/x mod 2^4
|
|
y = (y * (2 - (x & 0xff) * y)) & 0xff; // y == 1/x mod 2^8
|
|
y = (y * (2 - (((x & 0xffff) * y) & 0xffff))) & 0xffff; // y == 1/x mod 2^16
|
|
// last step - calculate inverse mod DV directly;
|
|
// assumes 16 < DB <= 32 and assumes ability to handle 48-bit ints
|
|
y = (y * (2 - x * y % this.DV)) % this.DV; // y == 1/x mod 2^dbits
|
|
// we really want the negative inverse, and -DV < y < DV
|
|
return (y > 0) ? this.DV - y : -y;
|
|
}
|
|
// Montgomery reduction
|
|
function Montgomery(m)
|
|
{
|
|
this.m = m;
|
|
this.mp = m.invDigit();
|
|
this.mpl = this.mp & 0x7fff;
|
|
this.mph = this.mp >> 15;
|
|
this.um = (1 << (m.DB - 15)) - 1;
|
|
this.mt2 = 2 * m.t;
|
|
}
|
|
// xR mod m
|
|
function montConvert(x)
|
|
{
|
|
var r = nbi();
|
|
x.abs().dlShiftTo(this.m.t, r);
|
|
r.divRemTo(this.m, null, r);
|
|
if (x.s < 0 && r.compareTo(BigInteger.ZERO) > 0) this.m.subTo(r, r);
|
|
return r;
|
|
}
|
|
// x/R mod m
|
|
function montRevert(x)
|
|
{
|
|
var r = nbi();
|
|
x.copyTo(r);
|
|
this.reduce(r);
|
|
return r;
|
|
}
|
|
// x = x/R mod m (HAC 14.32)
|
|
function montReduce(x)
|
|
{
|
|
while (x.t <= this.mt2) // pad x so am has enough room later
|
|
x[x.t++] = 0;
|
|
for (var i = 0; i < this.m.t; ++i)
|
|
{
|
|
// faster way of calculating u0 = x[i]*mp mod DV
|
|
var j = x[i] & 0x7fff;
|
|
var u0 = (j * this.mpl + (((j * this.mph + (x[i] >> 15) * this.mpl) & this.um) << 15)) & x.DM;
|
|
// use am to combine the multiply-shift-add into one call
|
|
j = i + this.m.t;
|
|
x[j] += this.m.am(0, u0, x, i, 0, this.m.t);
|
|
// propagate carry
|
|
while (x[j] >= x.DV)
|
|
{
|
|
x[j] -= x.DV;
|
|
x[++j]++;
|
|
}
|
|
}
|
|
x.clamp();
|
|
x.drShiftTo(this.m.t, x);
|
|
if (x.compareTo(this.m) >= 0) x.subTo(this.m, x);
|
|
}
|
|
// r = "x^2/R mod m"; x != r
|
|
function montSqrTo(x, r)
|
|
{
|
|
x.squareTo(r);
|
|
this.reduce(r);
|
|
}
|
|
// r = "xy/R mod m"; x,y != r
|
|
function montMulTo(x, y, r)
|
|
{
|
|
x.multiplyTo(y, r);
|
|
this.reduce(r);
|
|
}
|
|
Montgomery.prototype.convert = montConvert;
|
|
Montgomery.prototype.revert = montRevert;
|
|
Montgomery.prototype.reduce = montReduce;
|
|
Montgomery.prototype.mulTo = montMulTo;
|
|
Montgomery.prototype.sqrTo = montSqrTo;
|
|
// (protected) true iff this is even
|
|
function bnpIsEven()
|
|
{
|
|
return ((this.t > 0) ? (this[0] & 1) : this.s) == 0;
|
|
}
|
|
// (protected) this^e, e < 2^32, doing sqr and mul with "r" (HAC 14.79)
|
|
function bnpExp(e, z)
|
|
{
|
|
if (e > 0xffffffff || e < 1) return BigInteger.ONE;
|
|
var r = nbi(),
|
|
r2 = nbi(),
|
|
g = z.convert(this),
|
|
i = nbits(e) - 1;
|
|
g.copyTo(r);
|
|
while (--i >= 0)
|
|
{
|
|
z.sqrTo(r, r2);
|
|
if ((e & (1 << i)) > 0) z.mulTo(r2, g, r);
|
|
else
|
|
{
|
|
var t = r;
|
|
r = r2;
|
|
r2 = t;
|
|
}
|
|
}
|
|
return z.revert(r);
|
|
}
|
|
// (public) this^e % m, 0 <= e < 2^32
|
|
function bnModPowInt(e, m)
|
|
{
|
|
var z;
|
|
if (e < 256 || m.isEven()) z = new Classic(m);
|
|
else z = new Montgomery(m);
|
|
return this.exp(e, z);
|
|
}
|
|
// protected
|
|
BigInteger.prototype.copyTo = bnpCopyTo;
|
|
BigInteger.prototype.fromInt = bnpFromInt;
|
|
BigInteger.prototype.fromString = bnpFromString;
|
|
BigInteger.prototype.clamp = bnpClamp;
|
|
BigInteger.prototype.dlShiftTo = bnpDLShiftTo;
|
|
BigInteger.prototype.drShiftTo = bnpDRShiftTo;
|
|
BigInteger.prototype.lShiftTo = bnpLShiftTo;
|
|
BigInteger.prototype.rShiftTo = bnpRShiftTo;
|
|
BigInteger.prototype.subTo = bnpSubTo;
|
|
BigInteger.prototype.multiplyTo = bnpMultiplyTo;
|
|
BigInteger.prototype.squareTo = bnpSquareTo;
|
|
BigInteger.prototype.divRemTo = bnpDivRemTo;
|
|
BigInteger.prototype.invDigit = bnpInvDigit;
|
|
BigInteger.prototype.isEven = bnpIsEven;
|
|
BigInteger.prototype.exp = bnpExp;
|
|
// public
|
|
BigInteger.prototype.toString = bnToString;
|
|
BigInteger.prototype.negate = bnNegate;
|
|
BigInteger.prototype.abs = bnAbs;
|
|
BigInteger.prototype.compareTo = bnCompareTo;
|
|
BigInteger.prototype.bitLength = bnBitLength;
|
|
BigInteger.prototype.mod = bnMod;
|
|
BigInteger.prototype.modPowInt = bnModPowInt;
|
|
// "constants"
|
|
BigInteger.ZERO = nbv(0);
|
|
BigInteger.ONE = nbv(1);
|
|
// Copyright (c) 2005-2009 Tom Wu
|
|
// All Rights Reserved.
|
|
// See "LICENSE" for details.
|
|
// Extended JavaScript BN functions, required for RSA private ops.
|
|
// Version 1.1: new BigInteger("0", 10) returns "proper" zero
|
|
// Version 1.2: square() API, isProbablePrime fix
|
|
// (public)
|
|
function bnClone()
|
|
{
|
|
var r = nbi();
|
|
this.copyTo(r);
|
|
return r;
|
|
}
|
|
// (public) return value as integer
|
|
function bnIntValue()
|
|
{
|
|
if (this.s < 0)
|
|
{
|
|
if (this.t == 1) return this[0] - this.DV;
|
|
else if (this.t == 0) return -1;
|
|
}
|
|
else if (this.t == 1) return this[0];
|
|
else if (this.t == 0) return 0;
|
|
// assumes 16 < DB < 32
|
|
return ((this[1] & ((1 << (32 - this.DB)) - 1)) << this.DB) | this[0];
|
|
}
|
|
// (public) return value as byte
|
|
function bnByteValue()
|
|
{
|
|
return (this.t == 0) ? this.s : (this[0] << 24) >> 24;
|
|
}
|
|
// (public) return value as short (assumes DB>=16)
|
|
function bnShortValue()
|
|
{
|
|
return (this.t == 0) ? this.s : (this[0] << 16) >> 16;
|
|
}
|
|
// (protected) return x s.t. r^x < DV
|
|
function bnpChunkSize(r)
|
|
{
|
|
return Math.floor(Math.LN2 * this.DB / Math.log(r));
|
|
}
|
|
// (public) 0 if this == 0, 1 if this > 0
|
|
function bnSigNum()
|
|
{
|
|
if (this.s < 0) return -1;
|
|
else if (this.t <= 0 || (this.t == 1 && this[0] <= 0)) return 0;
|
|
else return 1;
|
|
}
|
|
// (protected) convert to radix string
|
|
function bnpToRadix(b)
|
|
{
|
|
if (b == null) b = 10;
|
|
if (this.signum() == 0 || b < 2 || b > 36) return "0";
|
|
var cs = this.chunkSize(b);
|
|
var a = Math.pow(b, cs);
|
|
var d = nbv(a),
|
|
y = nbi(),
|
|
z = nbi(),
|
|
r = "";
|
|
this.divRemTo(d, y, z);
|
|
while (y.signum() > 0)
|
|
{
|
|
r = (a + z.intValue()).toString(b).substr(1) + r;
|
|
y.divRemTo(d, y, z);
|
|
}
|
|
return z.intValue().toString(b) + r;
|
|
}
|
|
// (protected) convert from radix string
|
|
function bnpFromRadix(s, b)
|
|
{
|
|
this.fromInt(0);
|
|
if (b == null) b = 10;
|
|
var cs = this.chunkSize(b);
|
|
var d = Math.pow(b, cs),
|
|
mi = false,
|
|
j = 0,
|
|
w = 0;
|
|
for (var i = 0; i < s.length; ++i)
|
|
{
|
|
var x = intAt(s, i);
|
|
if (x < 0)
|
|
{
|
|
if (s.charAt(i) == "-" && this.signum() == 0) mi = true;
|
|
continue;
|
|
}
|
|
w = b * w + x;
|
|
if (++j >= cs)
|
|
{
|
|
this.dMultiply(d);
|
|
this.dAddOffset(w, 0);
|
|
j = 0;
|
|
w = 0;
|
|
}
|
|
}
|
|
if (j > 0)
|
|
{
|
|
this.dMultiply(Math.pow(b, j));
|
|
this.dAddOffset(w, 0);
|
|
}
|
|
if (mi) BigInteger.ZERO.subTo(this, this);
|
|
}
|
|
// (protected) alternate constructor
|
|
function bnpFromNumber(a, b, c)
|
|
{
|
|
if ("number" == typeof b)
|
|
{
|
|
// new BigInteger(int,int,RNG)
|
|
if (a < 2) this.fromInt(1);
|
|
else
|
|
{
|
|
this.fromNumber(a, c);
|
|
if (!this.testBit(a - 1)) // force MSB set
|
|
this.bitwiseTo(BigInteger.ONE.shiftLeft(a - 1), op_or, this);
|
|
if (this.isEven()) this.dAddOffset(1, 0); // force odd
|
|
while (!this.isProbablePrime(b))
|
|
{
|
|
this.dAddOffset(2, 0);
|
|
if (this.bitLength() > a) this.subTo(BigInteger.ONE.shiftLeft(a - 1), this);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// new BigInteger(int,RNG)
|
|
var x = new Array(),
|
|
t = a & 7;
|
|
x.length = (a >> 3) + 1;
|
|
b.nextBytes(x);
|
|
if (t > 0) x[0] &= ((1 << t) - 1);
|
|
else x[0] = 0;
|
|
this.fromString(x, 256);
|
|
}
|
|
}
|
|
// (public) convert to bigendian byte array
|
|
function bnToByteArray()
|
|
{
|
|
var i = this.t,
|
|
r = new Array();
|
|
r[0] = this.s;
|
|
var p = this.DB - (i * this.DB) % 8,
|
|
d, k = 0;
|
|
if (i-- > 0)
|
|
{
|
|
if (p < this.DB && (d = this[i] >> p) != (this.s & this.DM) >> p)
|
|
r[k++] = d | (this.s << (this.DB - p));
|
|
while (i >= 0)
|
|
{
|
|
if (p < 8)
|
|
{
|
|
d = (this[i] & ((1 << p) - 1)) << (8 - p);
|
|
d |= this[--i] >> (p += this.DB - 8);
|
|
}
|
|
else
|
|
{
|
|
d = (this[i] >> (p -= 8)) & 0xff;
|
|
if (p <= 0)
|
|
{
|
|
p += this.DB;
|
|
--i;
|
|
}
|
|
}
|
|
if ((d & 0x80) != 0) d |= -256;
|
|
if (k == 0 && (this.s & 0x80) != (d & 0x80))++k;
|
|
if (k > 0 || d != this.s) r[k++] = d;
|
|
}
|
|
}
|
|
return r;
|
|
}
|
|
|
|
function bnEquals(a)
|
|
{
|
|
return (this.compareTo(a) == 0);
|
|
}
|
|
|
|
function bnMin(a)
|
|
{
|
|
return (this.compareTo(a) < 0) ? this : a;
|
|
}
|
|
|
|
function bnMax(a)
|
|
{
|
|
return (this.compareTo(a) > 0) ? this : a;
|
|
}
|
|
// (protected) r = this op a (bitwise)
|
|
function bnpBitwiseTo(a, op, r)
|
|
{
|
|
var i, f, m = Math.min(a.t, this.t);
|
|
for (i = 0; i < m; ++i) r[i] = op(this[i], a[i]);
|
|
if (a.t < this.t)
|
|
{
|
|
f = a.s & this.DM;
|
|
for (i = m; i < this.t; ++i) r[i] = op(this[i], f);
|
|
r.t = this.t;
|
|
}
|
|
else
|
|
{
|
|
f = this.s & this.DM;
|
|
for (i = m; i < a.t; ++i) r[i] = op(f, a[i]);
|
|
r.t = a.t;
|
|
}
|
|
r.s = op(this.s, a.s);
|
|
r.clamp();
|
|
}
|
|
// (public) this & a
|
|
function op_and(x, y)
|
|
{
|
|
return x & y;
|
|
}
|
|
|
|
function bnAnd(a)
|
|
{
|
|
var r = nbi();
|
|
this.bitwiseTo(a, op_and, r);
|
|
return r;
|
|
}
|
|
// (public) this | a
|
|
function op_or(x, y)
|
|
{
|
|
return x | y;
|
|
}
|
|
|
|
function bnOr(a)
|
|
{
|
|
var r = nbi();
|
|
this.bitwiseTo(a, op_or, r);
|
|
return r;
|
|
}
|
|
// (public) this ^ a
|
|
function op_xor(x, y)
|
|
{
|
|
return x ^ y;
|
|
}
|
|
|
|
function bnXor(a)
|
|
{
|
|
var r = nbi();
|
|
this.bitwiseTo(a, op_xor, r);
|
|
return r;
|
|
}
|
|
// (public) this & ~a
|
|
function op_andnot(x, y)
|
|
{
|
|
return x & ~y;
|
|
}
|
|
|
|
function bnAndNot(a)
|
|
{
|
|
var r = nbi();
|
|
this.bitwiseTo(a, op_andnot, r);
|
|
return r;
|
|
}
|
|
// (public) ~this
|
|
function bnNot()
|
|
{
|
|
var r = nbi();
|
|
for (var i = 0; i < this.t; ++i) r[i] = this.DM & ~this[i];
|
|
r.t = this.t;
|
|
r.s = ~this.s;
|
|
return r;
|
|
}
|
|
// (public) this << n
|
|
function bnShiftLeft(n)
|
|
{
|
|
var r = nbi();
|
|
if (n < 0) this.rShiftTo(-n, r);
|
|
else this.lShiftTo(n, r);
|
|
return r;
|
|
}
|
|
// (public) this >> n
|
|
function bnShiftRight(n)
|
|
{
|
|
var r = nbi();
|
|
if (n < 0) this.lShiftTo(-n, r);
|
|
else this.rShiftTo(n, r);
|
|
return r;
|
|
}
|
|
// return index of lowest 1-bit in x, x < 2^31
|
|
function lbit(x)
|
|
{
|
|
if (x == 0) return -1;
|
|
var r = 0;
|
|
if ((x & 0xffff) == 0)
|
|
{
|
|
x >>= 16;
|
|
r += 16;
|
|
}
|
|
if ((x & 0xff) == 0)
|
|
{
|
|
x >>= 8;
|
|
r += 8;
|
|
}
|
|
if ((x & 0xf) == 0)
|
|
{
|
|
x >>= 4;
|
|
r += 4;
|
|
}
|
|
if ((x & 3) == 0)
|
|
{
|
|
x >>= 2;
|
|
r += 2;
|
|
}
|
|
if ((x & 1) == 0)++r;
|
|
return r;
|
|
}
|
|
// (public) returns index of lowest 1-bit (or -1 if none)
|
|
function bnGetLowestSetBit()
|
|
{
|
|
for (var i = 0; i < this.t; ++i)
|
|
if (this[i] != 0) return i * this.DB + lbit(this[i]);
|
|
if (this.s < 0) return this.t * this.DB;
|
|
return -1;
|
|
}
|
|
// return number of 1 bits in x
|
|
function cbit(x)
|
|
{
|
|
var r = 0;
|
|
while (x != 0)
|
|
{
|
|
x &= x - 1;
|
|
++r;
|
|
}
|
|
return r;
|
|
}
|
|
// (public) return number of set bits
|
|
function bnBitCount()
|
|
{
|
|
var r = 0,
|
|
x = this.s & this.DM;
|
|
for (var i = 0; i < this.t; ++i) r += cbit(this[i] ^ x);
|
|
return r;
|
|
}
|
|
// (public) true iff nth bit is set
|
|
function bnTestBit(n)
|
|
{
|
|
var j = Math.floor(n / this.DB);
|
|
if (j >= this.t) return (this.s != 0);
|
|
return ((this[j] & (1 << (n % this.DB))) != 0);
|
|
}
|
|
// (protected) this op (1<<n)
|
|
function bnpChangeBit(n, op)
|
|
{
|
|
var r = BigInteger.ONE.shiftLeft(n);
|
|
this.bitwiseTo(r, op, r);
|
|
return r;
|
|
}
|
|
// (public) this | (1<<n)
|
|
function bnSetBit(n)
|
|
{
|
|
return this.changeBit(n, op_or);
|
|
}
|
|
// (public) this & ~(1<<n)
|
|
function bnClearBit(n)
|
|
{
|
|
return this.changeBit(n, op_andnot);
|
|
}
|
|
// (public) this ^ (1<<n)
|
|
function bnFlipBit(n)
|
|
{
|
|
return this.changeBit(n, op_xor);
|
|
}
|
|
// (protected) r = this + a
|
|
function bnpAddTo(a, r)
|
|
{
|
|
var i = 0,
|
|
c = 0,
|
|
m = Math.min(a.t, this.t);
|
|
while (i < m)
|
|
{
|
|
c += this[i] + a[i];
|
|
r[i++] = c & this.DM;
|
|
c >>= this.DB;
|
|
}
|
|
if (a.t < this.t)
|
|
{
|
|
c += a.s;
|
|
while (i < this.t)
|
|
{
|
|
c += this[i];
|
|
r[i++] = c & this.DM;
|
|
c >>= this.DB;
|
|
}
|
|
c += this.s;
|
|
}
|
|
else
|
|
{
|
|
c += this.s;
|
|
while (i < a.t)
|
|
{
|
|
c += a[i];
|
|
r[i++] = c & this.DM;
|
|
c >>= this.DB;
|
|
}
|
|
c += a.s;
|
|
}
|
|
r.s = (c < 0) ? -1 : 0;
|
|
if (c > 0) r[i++] = c;
|
|
else if (c < -1) r[i++] = this.DV + c;
|
|
r.t = i;
|
|
r.clamp();
|
|
}
|
|
// (public) this + a
|
|
function bnAdd(a)
|
|
{
|
|
var r = nbi();
|
|
this.addTo(a, r);
|
|
return r;
|
|
}
|
|
// (public) this - a
|
|
function bnSubtract(a)
|
|
{
|
|
var r = nbi();
|
|
this.subTo(a, r);
|
|
return r;
|
|
}
|
|
// (public) this * a
|
|
function bnMultiply(a)
|
|
{
|
|
var r = nbi();
|
|
this.multiplyTo(a, r);
|
|
return r;
|
|
}
|
|
// (public) this^2
|
|
function bnSquare()
|
|
{
|
|
var r = nbi();
|
|
this.squareTo(r);
|
|
return r;
|
|
}
|
|
// (public) this / a
|
|
function bnDivide(a)
|
|
{
|
|
var r = nbi();
|
|
this.divRemTo(a, r, null);
|
|
return r;
|
|
}
|
|
// (public) this % a
|
|
function bnRemainder(a)
|
|
{
|
|
var r = nbi();
|
|
this.divRemTo(a, null, r);
|
|
return r;
|
|
}
|
|
// (public) [this/a,this%a]
|
|
function bnDivideAndRemainder(a)
|
|
{
|
|
var q = nbi(),
|
|
r = nbi();
|
|
this.divRemTo(a, q, r);
|
|
return new Array(q, r);
|
|
}
|
|
// (protected) this *= n, this >= 0, 1 < n < DV
|
|
function bnpDMultiply(n)
|
|
{
|
|
this[this.t] = this.am(0, n - 1, this, 0, 0, this.t);
|
|
++this.t;
|
|
this.clamp();
|
|
}
|
|
// (protected) this += n << w words, this >= 0
|
|
function bnpDAddOffset(n, w)
|
|
{
|
|
if (n == 0) return;
|
|
while (this.t <= w) this[this.t++] = 0;
|
|
this[w] += n;
|
|
while (this[w] >= this.DV)
|
|
{
|
|
this[w] -= this.DV;
|
|
if (++w >= this.t) this[this.t++] = 0;
|
|
++this[w];
|
|
}
|
|
}
|
|
// A "null" reducer
|
|
function NullExp()
|
|
{}
|
|
|
|
function nNop(x)
|
|
{
|
|
return x;
|
|
}
|
|
|
|
function nMulTo(x, y, r)
|
|
{
|
|
x.multiplyTo(y, r);
|
|
}
|
|
|
|
function nSqrTo(x, r)
|
|
{
|
|
x.squareTo(r);
|
|
}
|
|
NullExp.prototype.convert = nNop;
|
|
NullExp.prototype.revert = nNop;
|
|
NullExp.prototype.mulTo = nMulTo;
|
|
NullExp.prototype.sqrTo = nSqrTo;
|
|
// (public) this^e
|
|
function bnPow(e)
|
|
{
|
|
return this.exp(e, new NullExp());
|
|
}
|
|
// (protected) r = lower n words of "this * a", a.t <= n
|
|
// "this" should be the larger one if appropriate.
|
|
function bnpMultiplyLowerTo(a, n, r)
|
|
{
|
|
var i = Math.min(this.t + a.t, n);
|
|
r.s = 0; // assumes a,this >= 0
|
|
r.t = i;
|
|
while (i > 0) r[--i] = 0;
|
|
var j;
|
|
for (j = r.t - this.t; i < j; ++i) r[i + this.t] = this.am(0, a[i], r, i, 0, this.t);
|
|
for (j = Math.min(a.t, n); i < j; ++i) this.am(0, a[i], r, i, 0, n - i);
|
|
r.clamp();
|
|
}
|
|
// (protected) r = "this * a" without lower n words, n > 0
|
|
// "this" should be the larger one if appropriate.
|
|
function bnpMultiplyUpperTo(a, n, r)
|
|
{
|
|
--n;
|
|
var i = r.t = this.t + a.t - n;
|
|
r.s = 0; // assumes a,this >= 0
|
|
while (--i >= 0) r[i] = 0;
|
|
for (i = Math.max(n - this.t, 0); i < a.t; ++i)
|
|
r[this.t + i - n] = this.am(n - i, a[i], r, 0, 0, this.t + i - n);
|
|
r.clamp();
|
|
r.drShiftTo(1, r);
|
|
}
|
|
// Barrett modular reduction
|
|
function Barrett(m)
|
|
{
|
|
// setup Barrett
|
|
this.r2 = nbi();
|
|
this.q3 = nbi();
|
|
BigInteger.ONE.dlShiftTo(2 * m.t, this.r2);
|
|
this.mu = this.r2.divide(m);
|
|
this.m = m;
|
|
}
|
|
|
|
function barrettConvert(x)
|
|
{
|
|
if (x.s < 0 || x.t > 2 * this.m.t) return x.mod(this.m);
|
|
else if (x.compareTo(this.m) < 0) return x;
|
|
else
|
|
{
|
|
var r = nbi();
|
|
x.copyTo(r);
|
|
this.reduce(r);
|
|
return r;
|
|
}
|
|
}
|
|
|
|
function barrettRevert(x)
|
|
{
|
|
return x;
|
|
}
|
|
// x = x mod m (HAC 14.42)
|
|
function barrettReduce(x)
|
|
{
|
|
x.drShiftTo(this.m.t - 1, this.r2);
|
|
if (x.t > this.m.t + 1)
|
|
{
|
|
x.t = this.m.t + 1;
|
|
x.clamp();
|
|
}
|
|
this.mu.multiplyUpperTo(this.r2, this.m.t + 1, this.q3);
|
|
this.m.multiplyLowerTo(this.q3, this.m.t + 1, this.r2);
|
|
while (x.compareTo(this.r2) < 0) x.dAddOffset(1, this.m.t + 1);
|
|
x.subTo(this.r2, x);
|
|
while (x.compareTo(this.m) >= 0) x.subTo(this.m, x);
|
|
}
|
|
// r = x^2 mod m; x != r
|
|
function barrettSqrTo(x, r)
|
|
{
|
|
x.squareTo(r);
|
|
this.reduce(r);
|
|
}
|
|
// r = x*y mod m; x,y != r
|
|
function barrettMulTo(x, y, r)
|
|
{
|
|
x.multiplyTo(y, r);
|
|
this.reduce(r);
|
|
}
|
|
Barrett.prototype.convert = barrettConvert;
|
|
Barrett.prototype.revert = barrettRevert;
|
|
Barrett.prototype.reduce = barrettReduce;
|
|
Barrett.prototype.mulTo = barrettMulTo;
|
|
Barrett.prototype.sqrTo = barrettSqrTo;
|
|
// (public) this^e % m (HAC 14.85)
|
|
function bnModPow(e, m)
|
|
{
|
|
var i = e.bitLength(),
|
|
k, r = nbv(1),
|
|
z;
|
|
if (i <= 0) return r;
|
|
else if (i < 18) k = 1;
|
|
else if (i < 48) k = 3;
|
|
else if (i < 144) k = 4;
|
|
else if (i < 768) k = 5;
|
|
else k = 6;
|
|
if (i < 8)
|
|
z = new Classic(m);
|
|
else if (m.isEven())
|
|
z = new Barrett(m);
|
|
else
|
|
z = new Montgomery(m);
|
|
// precomputation
|
|
var g = new Array(),
|
|
n = 3,
|
|
k1 = k - 1,
|
|
km = (1 << k) - 1;
|
|
g[1] = z.convert(this);
|
|
if (k > 1)
|
|
{
|
|
var g2 = nbi();
|
|
z.sqrTo(g[1], g2);
|
|
while (n <= km)
|
|
{
|
|
g[n] = nbi();
|
|
z.mulTo(g2, g[n - 2], g[n]);
|
|
n += 2;
|
|
}
|
|
}
|
|
var j = e.t - 1,
|
|
w, is1 = true,
|
|
r2 = nbi(),
|
|
t;
|
|
i = nbits(e[j]) - 1;
|
|
while (j >= 0)
|
|
{
|
|
if (i >= k1) w = (e[j] >> (i - k1)) & km;
|
|
else
|
|
{
|
|
w = (e[j] & ((1 << (i + 1)) - 1)) << (k1 - i);
|
|
if (j > 0) w |= e[j - 1] >> (this.DB + i - k1);
|
|
}
|
|
n = k;
|
|
while ((w & 1) == 0)
|
|
{
|
|
w >>= 1;
|
|
--n;
|
|
}
|
|
if ((i -= n) < 0)
|
|
{
|
|
i += this.DB;
|
|
--j;
|
|
}
|
|
if (is1)
|
|
{ // ret == 1, don't bother squaring or multiplying it
|
|
g[w].copyTo(r);
|
|
is1 = false;
|
|
}
|
|
else
|
|
{
|
|
while (n > 1)
|
|
{
|
|
z.sqrTo(r, r2);
|
|
z.sqrTo(r2, r);
|
|
n -= 2;
|
|
}
|
|
if (n > 0) z.sqrTo(r, r2);
|
|
else
|
|
{
|
|
t = r;
|
|
r = r2;
|
|
r2 = t;
|
|
}
|
|
z.mulTo(r2, g[w], r);
|
|
}
|
|
while (j >= 0 && (e[j] & (1 << i)) == 0)
|
|
{
|
|
z.sqrTo(r, r2);
|
|
t = r;
|
|
r = r2;
|
|
r2 = t;
|
|
if (--i < 0)
|
|
{
|
|
i = this.DB - 1;
|
|
--j;
|
|
}
|
|
}
|
|
}
|
|
return z.revert(r);
|
|
}
|
|
// (public) gcd(this,a) (HAC 14.54)
|
|
function bnGCD(a)
|
|
{
|
|
var x = (this.s < 0) ? this.negate() : this.clone();
|
|
var y = (a.s < 0) ? a.negate() : a.clone();
|
|
if (x.compareTo(y) < 0)
|
|
{
|
|
var t = x;
|
|
x = y;
|
|
y = t;
|
|
}
|
|
var i = x.getLowestSetBit(),
|
|
g = y.getLowestSetBit();
|
|
if (g < 0) return x;
|
|
if (i < g) g = i;
|
|
if (g > 0)
|
|
{
|
|
x.rShiftTo(g, x);
|
|
y.rShiftTo(g, y);
|
|
}
|
|
while (x.signum() > 0)
|
|
{
|
|
if ((i = x.getLowestSetBit()) > 0) x.rShiftTo(i, x);
|
|
if ((i = y.getLowestSetBit()) > 0) y.rShiftTo(i, y);
|
|
if (x.compareTo(y) >= 0)
|
|
{
|
|
x.subTo(y, x);
|
|
x.rShiftTo(1, x);
|
|
}
|
|
else
|
|
{
|
|
y.subTo(x, y);
|
|
y.rShiftTo(1, y);
|
|
}
|
|
}
|
|
if (g > 0) y.lShiftTo(g, y);
|
|
return y;
|
|
}
|
|
// (protected) this % n, n < 2^26
|
|
function bnpModInt(n)
|
|
{
|
|
if (n <= 0) return 0;
|
|
var d = this.DV % n,
|
|
r = (this.s < 0) ? n - 1 : 0;
|
|
if (this.t > 0)
|
|
if (d == 0) r = this[0] % n;
|
|
else
|
|
for (var i = this.t - 1; i >= 0; --i) r = (d * r + this[i]) % n;
|
|
return r;
|
|
}
|
|
// (public) 1/this % m (HAC 14.61)
|
|
function bnModInverse(m)
|
|
{
|
|
var ac = m.isEven();
|
|
if ((this.isEven() && ac) || m.signum() == 0) return BigInteger.ZERO;
|
|
var u = m.clone(),
|
|
v = this.clone();
|
|
var a = nbv(1),
|
|
b = nbv(0),
|
|
c = nbv(0),
|
|
d = nbv(1);
|
|
while (u.signum() != 0)
|
|
{
|
|
while (u.isEven())
|
|
{
|
|
u.rShiftTo(1, u);
|
|
if (ac)
|
|
{
|
|
if (!a.isEven() || !b.isEven())
|
|
{
|
|
a.addTo(this, a);
|
|
b.subTo(m, b);
|
|
}
|
|
a.rShiftTo(1, a);
|
|
}
|
|
else if (!b.isEven()) b.subTo(m, b);
|
|
b.rShiftTo(1, b);
|
|
}
|
|
while (v.isEven())
|
|
{
|
|
v.rShiftTo(1, v);
|
|
if (ac)
|
|
{
|
|
if (!c.isEven() || !d.isEven())
|
|
{
|
|
c.addTo(this, c);
|
|
d.subTo(m, d);
|
|
}
|
|
c.rShiftTo(1, c);
|
|
}
|
|
else if (!d.isEven()) d.subTo(m, d);
|
|
d.rShiftTo(1, d);
|
|
}
|
|
if (u.compareTo(v) >= 0)
|
|
{
|
|
u.subTo(v, u);
|
|
if (ac) a.subTo(c, a);
|
|
b.subTo(d, b);
|
|
}
|
|
else
|
|
{
|
|
v.subTo(u, v);
|
|
if (ac) c.subTo(a, c);
|
|
d.subTo(b, d);
|
|
}
|
|
}
|
|
if (v.compareTo(BigInteger.ONE) != 0) return BigInteger.ZERO;
|
|
if (d.compareTo(m) >= 0) return d.subtract(m);
|
|
if (d.signum() < 0) d.addTo(m, d);
|
|
else return d;
|
|
if (d.signum() < 0) return d.add(m);
|
|
else return d;
|
|
}
|
|
var lowprimes = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503, 509, 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, 607, 613, 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701, 709, 719, 727, 733, 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, 811, 821, 823, 827, 829, 839, 853, 857, 859, 863, 877, 881, 883, 887, 907, 911, 919, 929, 937, 941, 947, 953, 967, 971, 977, 983, 991, 997];
|
|
var lplim = (1 << 26) / lowprimes[lowprimes.length - 1];
|
|
// (public) test primality with certainty >= 1-.5^t
|
|
function bnIsProbablePrime(t)
|
|
{
|
|
var i, x = this.abs();
|
|
if (x.t == 1 && x[0] <= lowprimes[lowprimes.length - 1])
|
|
{
|
|
for (i = 0; i < lowprimes.length; ++i)
|
|
if (x[0] == lowprimes[i]) return true;
|
|
return false;
|
|
}
|
|
if (x.isEven()) return false;
|
|
i = 1;
|
|
while (i < lowprimes.length)
|
|
{
|
|
var m = lowprimes[i],
|
|
j = i + 1;
|
|
while (j < lowprimes.length && m < lplim) m *= lowprimes[j++];
|
|
m = x.modInt(m);
|
|
while (i < j)
|
|
if (m % lowprimes[i++] == 0) return false;
|
|
}
|
|
return x.millerRabin(t);
|
|
}
|
|
// (protected) true if probably prime (HAC 4.24, Miller-Rabin)
|
|
function bnpMillerRabin(t)
|
|
{
|
|
var n1 = this.subtract(BigInteger.ONE);
|
|
var k = n1.getLowestSetBit();
|
|
if (k <= 0) return false;
|
|
var r = n1.shiftRight(k);
|
|
t = (t + 1) >> 1;
|
|
if (t > lowprimes.length) t = lowprimes.length;
|
|
var a = nbi();
|
|
for (var i = 0; i < t; ++i)
|
|
{
|
|
//Pick bases at random, instead of starting at 2
|
|
a.fromInt(lowprimes[Math.floor(Math.random() * lowprimes.length)]);
|
|
var y = a.modPow(r, this);
|
|
if (y.compareTo(BigInteger.ONE) != 0 && y.compareTo(n1) != 0)
|
|
{
|
|
var j = 1;
|
|
while (j++ < k && y.compareTo(n1) != 0)
|
|
{
|
|
y = y.modPowInt(2, this);
|
|
if (y.compareTo(BigInteger.ONE) == 0) return false;
|
|
}
|
|
if (y.compareTo(n1) != 0) return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
// protected
|
|
BigInteger.prototype.chunkSize = bnpChunkSize;
|
|
BigInteger.prototype.toRadix = bnpToRadix;
|
|
BigInteger.prototype.fromRadix = bnpFromRadix;
|
|
BigInteger.prototype.fromNumber = bnpFromNumber;
|
|
BigInteger.prototype.bitwiseTo = bnpBitwiseTo;
|
|
BigInteger.prototype.changeBit = bnpChangeBit;
|
|
BigInteger.prototype.addTo = bnpAddTo;
|
|
BigInteger.prototype.dMultiply = bnpDMultiply;
|
|
BigInteger.prototype.dAddOffset = bnpDAddOffset;
|
|
BigInteger.prototype.multiplyLowerTo = bnpMultiplyLowerTo;
|
|
BigInteger.prototype.multiplyUpperTo = bnpMultiplyUpperTo;
|
|
BigInteger.prototype.modInt = bnpModInt;
|
|
BigInteger.prototype.millerRabin = bnpMillerRabin;
|
|
// public
|
|
BigInteger.prototype.clone = bnClone;
|
|
BigInteger.prototype.intValue = bnIntValue;
|
|
BigInteger.prototype.byteValue = bnByteValue;
|
|
BigInteger.prototype.shortValue = bnShortValue;
|
|
BigInteger.prototype.signum = bnSigNum;
|
|
BigInteger.prototype.toByteArray = bnToByteArray;
|
|
BigInteger.prototype.equals = bnEquals;
|
|
BigInteger.prototype.min = bnMin;
|
|
BigInteger.prototype.max = bnMax;
|
|
BigInteger.prototype.and = bnAnd;
|
|
BigInteger.prototype.or = bnOr;
|
|
BigInteger.prototype.xor = bnXor;
|
|
BigInteger.prototype.andNot = bnAndNot;
|
|
BigInteger.prototype.not = bnNot;
|
|
BigInteger.prototype.shiftLeft = bnShiftLeft;
|
|
BigInteger.prototype.shiftRight = bnShiftRight;
|
|
BigInteger.prototype.getLowestSetBit = bnGetLowestSetBit;
|
|
BigInteger.prototype.bitCount = bnBitCount;
|
|
BigInteger.prototype.testBit = bnTestBit;
|
|
BigInteger.prototype.setBit = bnSetBit;
|
|
BigInteger.prototype.clearBit = bnClearBit;
|
|
BigInteger.prototype.flipBit = bnFlipBit;
|
|
BigInteger.prototype.add = bnAdd;
|
|
BigInteger.prototype.subtract = bnSubtract;
|
|
BigInteger.prototype.multiply = bnMultiply;
|
|
BigInteger.prototype.divide = bnDivide;
|
|
BigInteger.prototype.remainder = bnRemainder;
|
|
BigInteger.prototype.divideAndRemainder = bnDivideAndRemainder;
|
|
BigInteger.prototype.modPow = bnModPow;
|
|
BigInteger.prototype.modInverse = bnModInverse;
|
|
BigInteger.prototype.pow = bnPow;
|
|
BigInteger.prototype.gcd = bnGCD;
|
|
BigInteger.prototype.isProbablePrime = bnIsProbablePrime;
|
|
// JSBN-specific extension
|
|
BigInteger.prototype.square = bnSquare;
|
|
var Int128 = BigInteger;
|
|
// BigInteger interfaces not implemented in jsbn:
|
|
// BigInteger(int signum, byte[] magnitude)
|
|
// double doubleValue()
|
|
// float floatValue()
|
|
// int hashCode()
|
|
// long longValue()
|
|
// static BigInteger valueOf(long val)
|
|
// Helper functions to make BigInteger functions callable with two parameters
|
|
// as in original C# Clipper
|
|
Int128.prototype.IsNegative = function ()
|
|
{
|
|
if (this.compareTo(Int128.ZERO) == -1) return true;
|
|
else return false;
|
|
};
|
|
Int128.op_Equality = function (val1, val2)
|
|
{
|
|
if (val1.compareTo(val2) == 0) return true;
|
|
else return false;
|
|
};
|
|
Int128.op_Inequality = function (val1, val2)
|
|
{
|
|
if (val1.compareTo(val2) != 0) return true;
|
|
else return false;
|
|
};
|
|
Int128.op_GreaterThan = function (val1, val2)
|
|
{
|
|
if (val1.compareTo(val2) > 0) return true;
|
|
else return false;
|
|
};
|
|
Int128.op_LessThan = function (val1, val2)
|
|
{
|
|
if (val1.compareTo(val2) < 0) return true;
|
|
else return false;
|
|
};
|
|
Int128.op_Addition = function (lhs, rhs)
|
|
{
|
|
return new Int128(lhs).add(new Int128(rhs));
|
|
};
|
|
Int128.op_Subtraction = function (lhs, rhs)
|
|
{
|
|
return new Int128(lhs).subtract(new Int128(rhs));
|
|
};
|
|
Int128.Int128Mul = function (lhs, rhs)
|
|
{
|
|
return new Int128(lhs).multiply(new Int128(rhs));
|
|
};
|
|
Int128.op_Division = function (lhs, rhs)
|
|
{
|
|
return lhs.divide(rhs);
|
|
};
|
|
Int128.prototype.ToDouble = function ()
|
|
{
|
|
return parseFloat(this.toString()); // This could be something faster
|
|
};
|
|
// end of Int128 section
|
|
/*
|
|
// Uncomment the following two lines if you want to use Int128 outside ClipperLib
|
|
if (typeof(document) !== "undefined") window.Int128 = Int128;
|
|
else self.Int128 = Int128;
|
|
*/
|
|
// ---------------------------------------------
|
|
// Here starts the actual Clipper library:
|
|
// Helper function to support Inheritance in Javascript
|
|
if (typeof (Inherit) == 'undefined')
|
|
{
|
|
var Inherit = function (ce, ce2)
|
|
{
|
|
var p;
|
|
if (typeof (Object.getOwnPropertyNames) == 'undefined')
|
|
{
|
|
for (p in ce2.prototype)
|
|
if (typeof (ce.prototype[p]) == 'undefined' || ce.prototype[p] == Object.prototype[p]) ce.prototype[p] = ce2.prototype[p];
|
|
for (p in ce2)
|
|
if (typeof (ce[p]) == 'undefined') ce[p] = ce2[p];
|
|
ce.$baseCtor = ce2;
|
|
}
|
|
else
|
|
{
|
|
var props = Object.getOwnPropertyNames(ce2.prototype);
|
|
for (var i = 0; i < props.length; i++)
|
|
if (typeof (Object.getOwnPropertyDescriptor(ce.prototype, props[i])) == 'undefined') Object.defineProperty(ce.prototype, props[i], Object.getOwnPropertyDescriptor(ce2.prototype, props[i]));
|
|
for (p in ce2)
|
|
if (typeof (ce[p]) == 'undefined') ce[p] = ce2[p];
|
|
ce.$baseCtor = ce2;
|
|
}
|
|
};
|
|
}
|
|
ClipperLib.Path = function ()
|
|
{
|
|
return [];
|
|
};
|
|
ClipperLib.Paths = function ()
|
|
{
|
|
return []; // Was previously [[]], but caused problems when pushed
|
|
};
|
|
// Preserves the calling way of original C# Clipper
|
|
// Is essential due to compatibility, because DoublePoint is public class in original C# version
|
|
ClipperLib.DoublePoint = function ()
|
|
{
|
|
var a = arguments;
|
|
this.X = 0;
|
|
this.Y = 0;
|
|
// public DoublePoint(DoublePoint dp)
|
|
// public DoublePoint(IntPoint ip)
|
|
if (a.length == 1)
|
|
{
|
|
this.X = a[0].X;
|
|
this.Y = a[0].Y;
|
|
}
|
|
else if (a.length == 2)
|
|
{
|
|
this.X = a[0];
|
|
this.Y = a[1];
|
|
}
|
|
}; // This is internal faster function when called without arguments
|
|
ClipperLib.DoublePoint0 = function ()
|
|
{
|
|
this.X = 0;
|
|
this.Y = 0;
|
|
};
|
|
// This is internal faster function when called with 1 argument (dp or ip)
|
|
ClipperLib.DoublePoint1 = function (dp)
|
|
{
|
|
this.X = dp.X;
|
|
this.Y = dp.Y;
|
|
};
|
|
// This is internal faster function when called with 2 arguments (x and y)
|
|
ClipperLib.DoublePoint2 = function (x, y)
|
|
{
|
|
this.X = x;
|
|
this.Y = y;
|
|
};
|
|
// PolyTree & PolyNode start
|
|
// -------------------------------
|
|
ClipperLib.PolyNode = function ()
|
|
{
|
|
this.m_Parent = null;
|
|
this.m_polygon = new ClipperLib.Path();
|
|
this.m_Index = 0;
|
|
this.m_jointype = 0;
|
|
this.m_endtype = 0;
|
|
this.m_Childs = [];
|
|
this.IsOpen = false;
|
|
};
|
|
ClipperLib.PolyNode.prototype.IsHoleNode = function ()
|
|
{
|
|
var result = true;
|
|
var node = this.m_Parent;
|
|
while (node !== null)
|
|
{
|
|
result = !result;
|
|
node = node.m_Parent;
|
|
}
|
|
return result;
|
|
};
|
|
ClipperLib.PolyNode.prototype.ChildCount = function ()
|
|
{
|
|
return this.m_Childs.length;
|
|
};
|
|
ClipperLib.PolyNode.prototype.Contour = function ()
|
|
{
|
|
return this.m_polygon;
|
|
};
|
|
ClipperLib.PolyNode.prototype.AddChild = function (Child)
|
|
{
|
|
var cnt = this.m_Childs.length;
|
|
this.m_Childs.push(Child);
|
|
Child.m_Parent = this;
|
|
Child.m_Index = cnt;
|
|
};
|
|
ClipperLib.PolyNode.prototype.GetNext = function ()
|
|
{
|
|
if (this.m_Childs.length > 0)
|
|
return this.m_Childs[0];
|
|
else
|
|
return this.GetNextSiblingUp();
|
|
};
|
|
ClipperLib.PolyNode.prototype.GetNextSiblingUp = function ()
|
|
{
|
|
if (this.m_Parent === null)
|
|
return null;
|
|
else if (this.m_Index == this.m_Parent.m_Childs.length - 1)
|
|
return this.m_Parent.GetNextSiblingUp();
|
|
else
|
|
return this.m_Parent.m_Childs[this.m_Index + 1];
|
|
};
|
|
ClipperLib.PolyNode.prototype.Childs = function ()
|
|
{
|
|
return this.m_Childs;
|
|
};
|
|
ClipperLib.PolyNode.prototype.Parent = function ()
|
|
{
|
|
return this.m_Parent;
|
|
};
|
|
ClipperLib.PolyNode.prototype.IsHole = function ()
|
|
{
|
|
return this.IsHoleNode();
|
|
};
|
|
// PolyTree : PolyNode
|
|
ClipperLib.PolyTree = function ()
|
|
{
|
|
this.m_AllPolys = [];
|
|
ClipperLib.PolyNode.call(this);
|
|
};
|
|
ClipperLib.PolyTree.prototype.Clear = function ()
|
|
{
|
|
for (var i = 0, ilen = this.m_AllPolys.length; i < ilen; i++)
|
|
this.m_AllPolys[i] = null;
|
|
this.m_AllPolys.length = 0;
|
|
this.m_Childs.length = 0;
|
|
};
|
|
ClipperLib.PolyTree.prototype.GetFirst = function ()
|
|
{
|
|
if (this.m_Childs.length > 0)
|
|
return this.m_Childs[0];
|
|
else
|
|
return null;
|
|
};
|
|
ClipperLib.PolyTree.prototype.Total = function ()
|
|
{
|
|
return this.m_AllPolys.length;
|
|
};
|
|
Inherit(ClipperLib.PolyTree, ClipperLib.PolyNode);
|
|
// -------------------------------
|
|
// PolyTree & PolyNode end
|
|
ClipperLib.Math_Abs_Int64 = ClipperLib.Math_Abs_Int32 = ClipperLib.Math_Abs_Double = function (a)
|
|
{
|
|
return Math.abs(a);
|
|
};
|
|
ClipperLib.Math_Max_Int32_Int32 = function (a, b)
|
|
{
|
|
return Math.max(a, b);
|
|
};
|
|
/*
|
|
-----------------------------------
|
|
cast_32 speedtest: http://jsperf.com/truncate-float-to-integer/2
|
|
-----------------------------------
|
|
*/
|
|
if (browser.msie || browser.opera || browser.safari) ClipperLib.Cast_Int32 = function (a)
|
|
{
|
|
return a | 0;
|
|
};
|
|
else ClipperLib.Cast_Int32 = function (a)
|
|
{ // eg. browser.chrome || browser.chromium || browser.firefox
|
|
return~~ a;
|
|
};
|
|
/*
|
|
--------------------------
|
|
cast_64 speedtests: http://jsperf.com/truncate-float-to-integer
|
|
Chrome: bitwise_not_floor
|
|
Firefox17: toInteger (typeof test)
|
|
IE9: bitwise_or_floor
|
|
IE7 and IE8: to_parseint
|
|
Chromium: to_floor_or_ceil
|
|
Firefox3: to_floor_or_ceil
|
|
Firefox15: to_floor_or_ceil
|
|
Opera: to_floor_or_ceil
|
|
Safari: to_floor_or_ceil
|
|
--------------------------
|
|
*/
|
|
if (browser.chrome) ClipperLib.Cast_Int64 = function (a)
|
|
{
|
|
if (a < -2147483648 || a > 2147483647)
|
|
return a < 0 ? Math.ceil(a) : Math.floor(a);
|
|
else return~~ a;
|
|
};
|
|
else if (browser.firefox && typeof (Number.toInteger) == "function") ClipperLib.Cast_Int64 = function (a)
|
|
{
|
|
return Number.toInteger(a);
|
|
};
|
|
else if (browser.msie7 || browser.msie8) ClipperLib.Cast_Int64 = function (a)
|
|
{
|
|
return parseInt(a, 10);
|
|
};
|
|
else if (browser.msie) ClipperLib.Cast_Int64 = function (a)
|
|
{
|
|
if (a < -2147483648 || a > 2147483647)
|
|
return a < 0 ? Math.ceil(a) : Math.floor(a);
|
|
return a | 0;
|
|
};
|
|
// eg. browser.chromium || browser.firefox || browser.opera || browser.safari
|
|
else ClipperLib.Cast_Int64 = function (a)
|
|
{
|
|
return a < 0 ? Math.ceil(a) : Math.floor(a);
|
|
};
|
|
ClipperLib.Clear = function (a)
|
|
{
|
|
a.length = 0;
|
|
};
|
|
//ClipperLib.MaxSteps = 64; // How many steps at maximum in arc in BuildArc() function
|
|
ClipperLib.PI = 3.141592653589793;
|
|
ClipperLib.PI2 = 2 * 3.141592653589793;
|
|
ClipperLib.IntPoint = function ()
|
|
{
|
|
var a = arguments,
|
|
alen = a.length;
|
|
this.X = 0;
|
|
this.Y = 0;
|
|
if (use_xyz)
|
|
{
|
|
this.Z = 0;
|
|
if (alen == 3) // public IntPoint(cInt x, cInt y, cInt z = 0)
|
|
{
|
|
this.X = a[0];
|
|
this.Y = a[1];
|
|
this.Z = a[2];
|
|
}
|
|
else if (alen == 2) // public IntPoint(cInt x, cInt y)
|
|
{
|
|
this.X = a[0];
|
|
this.Y = a[1];
|
|
this.Z = 0;
|
|
}
|
|
else if (alen == 1)
|
|
{
|
|
if (a[0] instanceof ClipperLib.DoublePoint) // public IntPoint(DoublePoint dp)
|
|
{
|
|
var dp = a[0];
|
|
this.X = ClipperLib.Clipper.Round(dp.X);
|
|
this.Y = ClipperLib.Clipper.Round(dp.Y);
|
|
this.Z = 0;
|
|
}
|
|
else // public IntPoint(IntPoint pt)
|
|
{
|
|
var pt = a[0];
|
|
if (typeof (pt.Z) == "undefined") pt.Z = 0;
|
|
this.X = pt.X;
|
|
this.Y = pt.Y;
|
|
this.Z = pt.Z;
|
|
}
|
|
}
|
|
else // public IntPoint()
|
|
{
|
|
this.X = 0;
|
|
this.Y = 0;
|
|
this.Z = 0;
|
|
}
|
|
}
|
|
else // if (!use_xyz)
|
|
{
|
|
if (alen == 2) // public IntPoint(cInt X, cInt Y)
|
|
{
|
|
this.X = a[0];
|
|
this.Y = a[1];
|
|
}
|
|
else if (alen == 1)
|
|
{
|
|
if (a[0] instanceof ClipperLib.DoublePoint) // public IntPoint(DoublePoint dp)
|
|
{
|
|
var dp = a[0];
|
|
this.X = ClipperLib.Clipper.Round(dp.X);
|
|
this.Y = ClipperLib.Clipper.Round(dp.Y);
|
|
}
|
|
else // public IntPoint(IntPoint pt)
|
|
{
|
|
var pt = a[0];
|
|
this.X = pt.X;
|
|
this.Y = pt.Y;
|
|
}
|
|
}
|
|
else // public IntPoint(IntPoint pt)
|
|
{
|
|
this.X = 0;
|
|
this.Y = 0;
|
|
}
|
|
}
|
|
};
|
|
ClipperLib.IntPoint.op_Equality = function (a, b)
|
|
{
|
|
//return a == b;
|
|
return a.X == b.X && a.Y == b.Y;
|
|
};
|
|
ClipperLib.IntPoint.op_Inequality = function (a, b)
|
|
{
|
|
//return a != b;
|
|
return a.X != b.X || a.Y != b.Y;
|
|
};
|
|
/*
|
|
ClipperLib.IntPoint.prototype.Equals = function (obj)
|
|
{
|
|
if (obj === null)
|
|
return false;
|
|
if (obj instanceof ClipperLib.IntPoint)
|
|
{
|
|
var a = Cast(obj, ClipperLib.IntPoint);
|
|
return (this.X == a.X) && (this.Y == a.Y);
|
|
}
|
|
else
|
|
return false;
|
|
};
|
|
*/
|
|
if (use_xyz)
|
|
{
|
|
ClipperLib.IntPoint0 = function ()
|
|
{
|
|
this.X = 0;
|
|
this.Y = 0;
|
|
this.Z = 0;
|
|
};
|
|
ClipperLib.IntPoint1 = function (pt)
|
|
{
|
|
this.X = pt.X;
|
|
this.Y = pt.Y;
|
|
this.Z = pt.Z;
|
|
};
|
|
ClipperLib.IntPoint1dp = function (dp)
|
|
{
|
|
this.X = ClipperLib.Clipper.Round(dp.X);
|
|
this.Y = ClipperLib.Clipper.Round(dp.Y);
|
|
this.Z = 0;
|
|
};
|
|
ClipperLib.IntPoint2 = function (x, y)
|
|
{
|
|
this.X = x;
|
|
this.Y = y;
|
|
this.Z = 0;
|
|
};
|
|
ClipperLib.IntPoint3 = function (x, y, z)
|
|
{
|
|
this.X = x;
|
|
this.Y = y;
|
|
this.Z = z;
|
|
};
|
|
}
|
|
else // if (!use_xyz)
|
|
{
|
|
ClipperLib.IntPoint0 = function ()
|
|
{
|
|
this.X = 0;
|
|
this.Y = 0;
|
|
};
|
|
ClipperLib.IntPoint1 = function (pt)
|
|
{
|
|
this.X = pt.X;
|
|
this.Y = pt.Y;
|
|
};
|
|
ClipperLib.IntPoint1dp = function (dp)
|
|
{
|
|
this.X = ClipperLib.Clipper.Round(dp.X);
|
|
this.Y = ClipperLib.Clipper.Round(dp.Y);
|
|
};
|
|
ClipperLib.IntPoint2 = function (x, y)
|
|
{
|
|
this.X = x;
|
|
this.Y = y;
|
|
};
|
|
}
|
|
ClipperLib.IntRect = function ()
|
|
{
|
|
var a = arguments,
|
|
alen = a.length;
|
|
if (alen == 4) // function (l, t, r, b)
|
|
{
|
|
this.left = a[0];
|
|
this.top = a[1];
|
|
this.right = a[2];
|
|
this.bottom = a[3];
|
|
}
|
|
else if (alen == 1) // function (ir)
|
|
{
|
|
this.left = ir.left;
|
|
this.top = ir.top;
|
|
this.right = ir.right;
|
|
this.bottom = ir.bottom;
|
|
}
|
|
else // function ()
|
|
{
|
|
this.left = 0;
|
|
this.top = 0;
|
|
this.right = 0;
|
|
this.bottom = 0;
|
|
}
|
|
};
|
|
ClipperLib.IntRect0 = function ()
|
|
{
|
|
this.left = 0;
|
|
this.top = 0;
|
|
this.right = 0;
|
|
this.bottom = 0;
|
|
};
|
|
ClipperLib.IntRect1 = function (ir)
|
|
{
|
|
this.left = ir.left;
|
|
this.top = ir.top;
|
|
this.right = ir.right;
|
|
this.bottom = ir.bottom;
|
|
};
|
|
ClipperLib.IntRect4 = function (l, t, r, b)
|
|
{
|
|
this.left = l;
|
|
this.top = t;
|
|
this.right = r;
|
|
this.bottom = b;
|
|
};
|
|
ClipperLib.ClipType = {
|
|
ctIntersection: 0,
|
|
ctUnion: 1,
|
|
ctDifference: 2,
|
|
ctXor: 3
|
|
};
|
|
ClipperLib.PolyType = {
|
|
ptSubject: 0,
|
|
ptClip: 1
|
|
};
|
|
ClipperLib.PolyFillType = {
|
|
pftEvenOdd: 0,
|
|
pftNonZero: 1,
|
|
pftPositive: 2,
|
|
pftNegative: 3
|
|
};
|
|
ClipperLib.JoinType = {
|
|
jtSquare: 0,
|
|
jtRound: 1,
|
|
jtMiter: 2
|
|
};
|
|
ClipperLib.EndType = {
|
|
etOpenSquare: 0,
|
|
etOpenRound: 1,
|
|
etOpenButt: 2,
|
|
etClosedLine: 3,
|
|
etClosedPolygon: 4
|
|
};
|
|
if (use_deprecated)
|
|
ClipperLib.EndType_ = {
|
|
etSquare: 0,
|
|
etRound: 1,
|
|
etButt: 2,
|
|
etClosed: 3
|
|
};
|
|
ClipperLib.EdgeSide = {
|
|
esLeft: 0,
|
|
esRight: 1
|
|
};
|
|
ClipperLib.Direction = {
|
|
dRightToLeft: 0,
|
|
dLeftToRight: 1
|
|
};
|
|
ClipperLib.TEdge = function ()
|
|
{
|
|
this.Bot = new ClipperLib.IntPoint();
|
|
this.Curr = new ClipperLib.IntPoint();
|
|
this.Top = new ClipperLib.IntPoint();
|
|
this.Delta = new ClipperLib.IntPoint();
|
|
this.Dx = 0;
|
|
this.PolyTyp = ClipperLib.PolyType.ptSubject;
|
|
this.Side = ClipperLib.EdgeSide.esLeft;
|
|
this.WindDelta = 0;
|
|
this.WindCnt = 0;
|
|
this.WindCnt2 = 0;
|
|
this.OutIdx = 0;
|
|
this.Next = null;
|
|
this.Prev = null;
|
|
this.NextInLML = null;
|
|
this.NextInAEL = null;
|
|
this.PrevInAEL = null;
|
|
this.NextInSEL = null;
|
|
this.PrevInSEL = null;
|
|
};
|
|
ClipperLib.IntersectNode = function ()
|
|
{
|
|
this.Edge1 = null;
|
|
this.Edge2 = null;
|
|
this.Pt = new ClipperLib.IntPoint();
|
|
};
|
|
ClipperLib.MyIntersectNodeSort = function () {};
|
|
ClipperLib.MyIntersectNodeSort.Compare = function (node1, node2)
|
|
{
|
|
return (node2.Pt.Y - node1.Pt.Y);
|
|
};
|
|
ClipperLib.LocalMinima = function ()
|
|
{
|
|
this.Y = 0;
|
|
this.LeftBound = null;
|
|
this.RightBound = null;
|
|
this.Next = null;
|
|
};
|
|
ClipperLib.Scanbeam = function ()
|
|
{
|
|
this.Y = 0;
|
|
this.Next = null;
|
|
};
|
|
ClipperLib.OutRec = function ()
|
|
{
|
|
this.Idx = 0;
|
|
this.IsHole = false;
|
|
this.IsOpen = false;
|
|
this.FirstLeft = null;
|
|
this.Pts = null;
|
|
this.BottomPt = null;
|
|
this.PolyNode = null;
|
|
};
|
|
ClipperLib.OutPt = function ()
|
|
{
|
|
this.Idx = 0;
|
|
this.Pt = new ClipperLib.IntPoint();
|
|
this.Next = null;
|
|
this.Prev = null;
|
|
};
|
|
ClipperLib.Join = function ()
|
|
{
|
|
this.OutPt1 = null;
|
|
this.OutPt2 = null;
|
|
this.OffPt = new ClipperLib.IntPoint();
|
|
};
|
|
ClipperLib.ClipperBase = function ()
|
|
{
|
|
this.m_MinimaList = null;
|
|
this.m_CurrentLM = null;
|
|
this.m_edges = new Array();
|
|
this.m_UseFullRange = false;
|
|
this.m_HasOpenPaths = false;
|
|
this.PreserveCollinear = false;
|
|
this.m_MinimaList = null;
|
|
this.m_CurrentLM = null;
|
|
this.m_UseFullRange = false;
|
|
this.m_HasOpenPaths = false;
|
|
};
|
|
// Ranges are in original C# too high for Javascript (in current state 2013 september):
|
|
// protected const double horizontal = -3.4E+38;
|
|
// internal const cInt loRange = 0x3FFFFFFF; // = 1073741823 = sqrt(2^63 -1)/2
|
|
// internal const cInt hiRange = 0x3FFFFFFFFFFFFFFFL; // = 4611686018427387903 = sqrt(2^127 -1)/2
|
|
// So had to adjust them to more suitable for Javascript.
|
|
// If JS some day supports truly 64-bit integers, then these ranges can be as in C#
|
|
// and biginteger library can be more simpler (as then 128bit can be represented as two 64bit numbers)
|
|
ClipperLib.ClipperBase.horizontal = -9007199254740992; //-2^53
|
|
ClipperLib.ClipperBase.Skip = -2;
|
|
ClipperLib.ClipperBase.Unassigned = -1;
|
|
ClipperLib.ClipperBase.tolerance = 1E-20;
|
|
if (use_int32)
|
|
{
|
|
ClipperLib.ClipperBase.loRange = 46340;
|
|
ClipperLib.ClipperBase.hiRange = 46340;
|
|
}
|
|
else
|
|
{
|
|
ClipperLib.ClipperBase.loRange = 47453132; // sqrt(2^53 -1)/2
|
|
ClipperLib.ClipperBase.hiRange = 4503599627370495; // sqrt(2^106 -1)/2
|
|
}
|
|
ClipperLib.ClipperBase.near_zero = function (val)
|
|
{
|
|
return (val > -ClipperLib.ClipperBase.tolerance) && (val < ClipperLib.ClipperBase.tolerance);
|
|
};
|
|
ClipperLib.ClipperBase.IsHorizontal = function (e)
|
|
{
|
|
return e.Delta.Y === 0;
|
|
};
|
|
ClipperLib.ClipperBase.prototype.PointIsVertex = function (pt, pp)
|
|
{
|
|
var pp2 = pp;
|
|
do {
|
|
if (ClipperLib.IntPoint.op_Equality(pp2.Pt, pt))
|
|
return true;
|
|
pp2 = pp2.Next;
|
|
}
|
|
while (pp2 != pp)
|
|
return false;
|
|
};
|
|
ClipperLib.ClipperBase.prototype.PointOnLineSegment = function (pt, linePt1, linePt2, UseFullRange)
|
|
{
|
|
if (UseFullRange)
|
|
return ((pt.X == linePt1.X) && (pt.Y == linePt1.Y)) ||
|
|
((pt.X == linePt2.X) && (pt.Y == linePt2.Y)) ||
|
|
(((pt.X > linePt1.X) == (pt.X < linePt2.X)) &&
|
|
((pt.Y > linePt1.Y) == (pt.Y < linePt2.Y)) &&
|
|
(Int128.op_Equality(Int128.Int128Mul((pt.X - linePt1.X), (linePt2.Y - linePt1.Y)),
|
|
Int128.Int128Mul((linePt2.X - linePt1.X), (pt.Y - linePt1.Y)))));
|
|
else
|
|
return ((pt.X == linePt1.X) && (pt.Y == linePt1.Y)) || ((pt.X == linePt2.X) && (pt.Y == linePt2.Y)) || (((pt.X > linePt1.X) == (pt.X < linePt2.X)) && ((pt.Y > linePt1.Y) == (pt.Y < linePt2.Y)) && ((pt.X - linePt1.X) * (linePt2.Y - linePt1.Y) == (linePt2.X - linePt1.X) * (pt.Y - linePt1.Y)));
|
|
};
|
|
ClipperLib.ClipperBase.prototype.PointOnPolygon = function (pt, pp, UseFullRange)
|
|
{
|
|
var pp2 = pp;
|
|
while (true)
|
|
{
|
|
if (this.PointOnLineSegment(pt, pp2.Pt, pp2.Next.Pt, UseFullRange))
|
|
return true;
|
|
pp2 = pp2.Next;
|
|
if (pp2 == pp)
|
|
break;
|
|
}
|
|
return false;
|
|
};
|
|
ClipperLib.ClipperBase.prototype.SlopesEqual = ClipperLib.ClipperBase.SlopesEqual = function ()
|
|
{
|
|
var a = arguments,
|
|
alen = a.length;
|
|
var e1, e2, pt1, pt2, pt3, pt4, UseFullRange;
|
|
if (alen == 3) // function (e1, e2, UseFullRange)
|
|
{
|
|
e1 = a[0];
|
|
e2 = a[1];
|
|
UseFullRange = a[2];
|
|
if (UseFullRange)
|
|
return Int128.op_Equality(Int128.Int128Mul(e1.Delta.Y, e2.Delta.X), Int128.Int128Mul(e1.Delta.X, e2.Delta.Y));
|
|
else
|
|
return ClipperLib.Cast_Int64((e1.Delta.Y) * (e2.Delta.X)) == ClipperLib.Cast_Int64((e1.Delta.X) * (e2.Delta.Y));
|
|
}
|
|
else if (alen == 4) // function (pt1, pt2, pt3, UseFullRange)
|
|
{
|
|
pt1 = a[0];
|
|
pt2 = a[1];
|
|
pt3 = a[2];
|
|
UseFullRange = a[3];
|
|
if (UseFullRange)
|
|
return Int128.op_Equality(Int128.Int128Mul(pt1.Y - pt2.Y, pt2.X - pt3.X), Int128.Int128Mul(pt1.X - pt2.X, pt2.Y - pt3.Y));
|
|
else
|
|
return ClipperLib.Cast_Int64((pt1.Y - pt2.Y) * (pt2.X - pt3.X)) - ClipperLib.Cast_Int64((pt1.X - pt2.X) * (pt2.Y - pt3.Y)) === 0;
|
|
}
|
|
else // function (pt1, pt2, pt3, pt4, UseFullRange)
|
|
{
|
|
pt1 = a[0];
|
|
pt2 = a[1];
|
|
pt3 = a[2];
|
|
pt4 = a[3];
|
|
UseFullRange = a[4];
|
|
if (UseFullRange)
|
|
return Int128.op_Equality(Int128.Int128Mul(pt1.Y - pt2.Y, pt3.X - pt4.X), Int128.Int128Mul(pt1.X - pt2.X, pt3.Y - pt4.Y));
|
|
else
|
|
return ClipperLib.Cast_Int64((pt1.Y - pt2.Y) * (pt3.X - pt4.X)) - ClipperLib.Cast_Int64((pt1.X - pt2.X) * (pt3.Y - pt4.Y)) === 0;
|
|
}
|
|
};
|
|
ClipperLib.ClipperBase.SlopesEqual3 = function (e1, e2, UseFullRange)
|
|
{
|
|
if (UseFullRange)
|
|
return Int128.op_Equality(Int128.Int128Mul(e1.Delta.Y, e2.Delta.X), Int128.Int128Mul(e1.Delta.X, e2.Delta.Y));
|
|
else
|
|
return ClipperLib.Cast_Int64((e1.Delta.Y) * (e2.Delta.X)) == ClipperLib.Cast_Int64((e1.Delta.X) * (e2.Delta.Y));
|
|
};
|
|
ClipperLib.ClipperBase.SlopesEqual4 = function (pt1, pt2, pt3, UseFullRange)
|
|
{
|
|
if (UseFullRange)
|
|
return Int128.op_Equality(Int128.Int128Mul(pt1.Y - pt2.Y, pt2.X - pt3.X), Int128.Int128Mul(pt1.X - pt2.X, pt2.Y - pt3.Y));
|
|
else
|
|
return ClipperLib.Cast_Int64((pt1.Y - pt2.Y) * (pt2.X - pt3.X)) - ClipperLib.Cast_Int64((pt1.X - pt2.X) * (pt2.Y - pt3.Y)) === 0;
|
|
};
|
|
ClipperLib.ClipperBase.SlopesEqual5 = function (pt1, pt2, pt3, pt4, UseFullRange)
|
|
{
|
|
if (UseFullRange)
|
|
return Int128.op_Equality(Int128.Int128Mul(pt1.Y - pt2.Y, pt3.X - pt4.X), Int128.Int128Mul(pt1.X - pt2.X, pt3.Y - pt4.Y));
|
|
else
|
|
return ClipperLib.Cast_Int64((pt1.Y - pt2.Y) * (pt3.X - pt4.X)) - ClipperLib.Cast_Int64((pt1.X - pt2.X) * (pt3.Y - pt4.Y)) === 0;
|
|
};
|
|
ClipperLib.ClipperBase.prototype.Clear = function ()
|
|
{
|
|
this.DisposeLocalMinimaList();
|
|
for (var i = 0, ilen = this.m_edges.length; i < ilen; ++i)
|
|
{
|
|
for (var j = 0, jlen = this.m_edges[i].length; j < jlen; ++j)
|
|
this.m_edges[i][j] = null;
|
|
ClipperLib.Clear(this.m_edges[i]);
|
|
}
|
|
ClipperLib.Clear(this.m_edges);
|
|
this.m_UseFullRange = false;
|
|
this.m_HasOpenPaths = false;
|
|
};
|
|
ClipperLib.ClipperBase.prototype.DisposeLocalMinimaList = function ()
|
|
{
|
|
while (this.m_MinimaList !== null)
|
|
{
|
|
var tmpLm = this.m_MinimaList.Next;
|
|
this.m_MinimaList = null;
|
|
this.m_MinimaList = tmpLm;
|
|
}
|
|
this.m_CurrentLM = null;
|
|
};
|
|
ClipperLib.ClipperBase.prototype.RangeTest = function (Pt, useFullRange)
|
|
{
|
|
if (useFullRange.Value)
|
|
{
|
|
if (Pt.X > ClipperLib.ClipperBase.hiRange || Pt.Y > ClipperLib.ClipperBase.hiRange || -Pt.X > ClipperLib.ClipperBase.hiRange || -Pt.Y > ClipperLib.ClipperBase.hiRange)
|
|
ClipperLib.Error("Coordinate outside allowed range in RangeTest().");
|
|
}
|
|
else if (Pt.X > ClipperLib.ClipperBase.loRange || Pt.Y > ClipperLib.ClipperBase.loRange || -Pt.X > ClipperLib.ClipperBase.loRange || -Pt.Y > ClipperLib.ClipperBase.loRange)
|
|
{
|
|
useFullRange.Value = true;
|
|
this.RangeTest(Pt, useFullRange);
|
|
}
|
|
};
|
|
ClipperLib.ClipperBase.prototype.InitEdge = function (e, eNext, ePrev, pt)
|
|
{
|
|
e.Next = eNext;
|
|
e.Prev = ePrev;
|
|
//e.Curr = pt;
|
|
e.Curr.X = pt.X;
|
|
e.Curr.Y = pt.Y;
|
|
e.OutIdx = -1;
|
|
};
|
|
ClipperLib.ClipperBase.prototype.InitEdge2 = function (e, polyType)
|
|
{
|
|
if (e.Curr.Y >= e.Next.Curr.Y)
|
|
{
|
|
//e.Bot = e.Curr;
|
|
e.Bot.X = e.Curr.X;
|
|
e.Bot.Y = e.Curr.Y;
|
|
//e.Top = e.Next.Curr;
|
|
e.Top.X = e.Next.Curr.X;
|
|
e.Top.Y = e.Next.Curr.Y;
|
|
}
|
|
else
|
|
{
|
|
//e.Top = e.Curr;
|
|
e.Top.X = e.Curr.X;
|
|
e.Top.Y = e.Curr.Y;
|
|
//e.Bot = e.Next.Curr;
|
|
e.Bot.X = e.Next.Curr.X;
|
|
e.Bot.Y = e.Next.Curr.Y;
|
|
}
|
|
this.SetDx(e);
|
|
e.PolyTyp = polyType;
|
|
};
|
|
ClipperLib.ClipperBase.prototype.FindNextLocMin = function (E)
|
|
{
|
|
var E2;
|
|
for (;;)
|
|
{
|
|
while (ClipperLib.IntPoint.op_Inequality(E.Bot, E.Prev.Bot) || ClipperLib.IntPoint.op_Equality(E.Curr, E.Top))
|
|
E = E.Next;
|
|
if (E.Dx != ClipperLib.ClipperBase.horizontal && E.Prev.Dx != ClipperLib.ClipperBase.horizontal)
|
|
break;
|
|
while (E.Prev.Dx == ClipperLib.ClipperBase.horizontal)
|
|
E = E.Prev;
|
|
E2 = E;
|
|
while (E.Dx == ClipperLib.ClipperBase.horizontal)
|
|
E = E.Next;
|
|
if (E.Top.Y == E.Prev.Bot.Y)
|
|
continue;
|
|
//ie just an intermediate horz.
|
|
if (E2.Prev.Bot.X < E.Bot.X)
|
|
E = E2;
|
|
break;
|
|
}
|
|
return E;
|
|
};
|
|
ClipperLib.ClipperBase.prototype.ProcessBound = function (E, IsClockwise)
|
|
{
|
|
var EStart = E,
|
|
Result = E;
|
|
var Horz;
|
|
var StartX;
|
|
if (E.Dx == ClipperLib.ClipperBase.horizontal)
|
|
{
|
|
//it's possible for adjacent overlapping horz edges to start heading left
|
|
//before finishing right, so ...
|
|
if (IsClockwise)
|
|
StartX = E.Prev.Bot.X;
|
|
else
|
|
StartX = E.Next.Bot.X;
|
|
if (E.Bot.X != StartX)
|
|
this.ReverseHorizontal(E);
|
|
}
|
|
if (Result.OutIdx != ClipperLib.ClipperBase.Skip)
|
|
{
|
|
if (IsClockwise)
|
|
{
|
|
while (Result.Top.Y == Result.Next.Bot.Y && Result.Next.OutIdx != ClipperLib.ClipperBase.Skip)
|
|
Result = Result.Next;
|
|
if (Result.Dx == ClipperLib.ClipperBase.horizontal && Result.Next.OutIdx != ClipperLib.ClipperBase.Skip)
|
|
{
|
|
//nb: at the top of a bound, horizontals are added to the bound
|
|
//only when the preceding edge attaches to the horizontal's left vertex
|
|
//unless a Skip edge is encountered when that becomes the top divide
|
|
Horz = Result;
|
|
while (Horz.Prev.Dx == ClipperLib.ClipperBase.horizontal)
|
|
Horz = Horz.Prev;
|
|
if (Horz.Prev.Top.X == Result.Next.Top.X)
|
|
{
|
|
if (!IsClockwise)
|
|
Result = Horz.Prev;
|
|
}
|
|
else if (Horz.Prev.Top.X > Result.Next.Top.X)
|
|
Result = Horz.Prev;
|
|
}
|
|
while (E != Result)
|
|
{
|
|
E.NextInLML = E.Next;
|
|
if (E.Dx == ClipperLib.ClipperBase.horizontal && E != EStart && E.Bot.X != E.Prev.Top.X)
|
|
this.ReverseHorizontal(E);
|
|
E = E.Next;
|
|
}
|
|
if (E.Dx == ClipperLib.ClipperBase.horizontal && E != EStart && E.Bot.X != E.Prev.Top.X)
|
|
this.ReverseHorizontal(E);
|
|
Result = Result.Next;
|
|
//move to the edge just beyond current bound
|
|
}
|
|
else
|
|
{
|
|
while (Result.Top.Y == Result.Prev.Bot.Y && Result.Prev.OutIdx != ClipperLib.ClipperBase.Skip)
|
|
Result = Result.Prev;
|
|
if (Result.Dx == ClipperLib.ClipperBase.horizontal && Result.Prev.OutIdx != ClipperLib.ClipperBase.Skip)
|
|
{
|
|
Horz = Result;
|
|
while (Horz.Next.Dx == ClipperLib.ClipperBase.horizontal)
|
|
Horz = Horz.Next;
|
|
if (Horz.Next.Top.X == Result.Prev.Top.X)
|
|
{
|
|
if (!IsClockwise)
|
|
Result = Horz.Next;
|
|
}
|
|
else if (Horz.Next.Top.X > Result.Prev.Top.X)
|
|
Result = Horz.Next;
|
|
}
|
|
while (E != Result)
|
|
{
|
|
E.NextInLML = E.Prev;
|
|
if (E.Dx == ClipperLib.ClipperBase.horizontal && E != EStart && E.Bot.X != E.Next.Top.X)
|
|
this.ReverseHorizontal(E);
|
|
E = E.Prev;
|
|
}
|
|
if (E.Dx == ClipperLib.ClipperBase.horizontal && E != EStart && E.Bot.X != E.Next.Top.X)
|
|
this.ReverseHorizontal(E);
|
|
Result = Result.Prev;
|
|
//move to the edge just beyond current bound
|
|
}
|
|
}
|
|
if (Result.OutIdx == ClipperLib.ClipperBase.Skip)
|
|
{
|
|
//if edges still remain in the current bound beyond the skip edge then
|
|
//create another LocMin and call ProcessBound once more
|
|
E = Result;
|
|
if (IsClockwise)
|
|
{
|
|
while (E.Top.Y == E.Next.Bot.Y)
|
|
E = E.Next;
|
|
//don't include top horizontals when parsing a bound a second time,
|
|
//they will be contained in the opposite bound ...
|
|
while (E != Result && E.Dx == ClipperLib.ClipperBase.horizontal)
|
|
E = E.Prev;
|
|
}
|
|
else
|
|
{
|
|
while (E.Top.Y == E.Prev.Bot.Y)
|
|
E = E.Prev;
|
|
while (E != Result && E.Dx == ClipperLib.ClipperBase.horizontal)
|
|
E = E.Next;
|
|
}
|
|
if (E == Result)
|
|
{
|
|
if (IsClockwise)
|
|
Result = E.Next;
|
|
else
|
|
Result = E.Prev;
|
|
}
|
|
else
|
|
{
|
|
//there are more edges in the bound beyond result starting with E
|
|
if (IsClockwise)
|
|
E = Result.Next;
|
|
else
|
|
E = Result.Prev;
|
|
var locMin = new ClipperLib.LocalMinima();
|
|
locMin.Next = null;
|
|
locMin.Y = E.Bot.Y;
|
|
locMin.LeftBound = null;
|
|
locMin.RightBound = E;
|
|
locMin.RightBound.WindDelta = 0;
|
|
Result = this.ProcessBound(locMin.RightBound, IsClockwise);
|
|
this.InsertLocalMinima(locMin);
|
|
}
|
|
}
|
|
return Result;
|
|
};
|
|
ClipperLib.ClipperBase.prototype.AddPath = function (pg, polyType, Closed)
|
|
{
|
|
if (use_lines)
|
|
{
|
|
if (!Closed && polyType == ClipperLib.PolyType.ptClip)
|
|
ClipperLib.Error("AddPath: Open paths must be subject.");
|
|
}
|
|
else
|
|
{
|
|
if (!Closed)
|
|
ClipperLib.Error("AddPath: Open paths have been disabled.");
|
|
}
|
|
var highI = pg.length - 1;
|
|
if (Closed)
|
|
while (highI > 0 && (ClipperLib.IntPoint.op_Equality(pg[highI], pg[0])))
|
|
--highI;
|
|
while (highI > 0 && (ClipperLib.IntPoint.op_Equality(pg[highI], pg[highI - 1])))
|
|
--highI;
|
|
if ((Closed && highI < 2) || (!Closed && highI < 1))
|
|
return false;
|
|
//create a new edge array ...
|
|
var edges = new Array();
|
|
for (var i = 0; i <= highI; i++)
|
|
edges.push(new ClipperLib.TEdge());
|
|
var IsFlat = true;
|
|
//1. Basic (first) edge initialization ...
|
|
|
|
//edges[1].Curr = pg[1];
|
|
edges[1].Curr.X = pg[1].X;
|
|
edges[1].Curr.Y = pg[1].Y;
|
|
|
|
var $1 = {Value: this.m_UseFullRange};
|
|
this.RangeTest(pg[0], $1);
|
|
this.m_UseFullRange = $1.Value;
|
|
|
|
$1.Value = this.m_UseFullRange;
|
|
this.RangeTest(pg[highI], $1);
|
|
this.m_UseFullRange = $1.Value;
|
|
|
|
this.InitEdge(edges[0], edges[1], edges[highI], pg[0]);
|
|
this.InitEdge(edges[highI], edges[0], edges[highI - 1], pg[highI]);
|
|
for (var i = highI - 1; i >= 1; --i)
|
|
{
|
|
$1.Value = this.m_UseFullRange;
|
|
this.RangeTest(pg[i], $1);
|
|
this.m_UseFullRange = $1.Value;
|
|
|
|
this.InitEdge(edges[i], edges[i + 1], edges[i - 1], pg[i]);
|
|
}
|
|
|
|
var eStart = edges[0];
|
|
//2. Remove duplicate vertices, and (when closed) collinear edges ...
|
|
var E = eStart,
|
|
eLoopStop = eStart;
|
|
for (;;)
|
|
{
|
|
if (ClipperLib.IntPoint.op_Equality(E.Curr, E.Next.Curr))
|
|
{
|
|
if (E == E.Next)
|
|
break;
|
|
if (E == eStart)
|
|
eStart = E.Next;
|
|
E = this.RemoveEdge(E);
|
|
eLoopStop = E;
|
|
continue;
|
|
}
|
|
if (E.Prev == E.Next)
|
|
break;
|
|
else if (Closed && ClipperLib.ClipperBase.SlopesEqual(E.Prev.Curr, E.Curr, E.Next.Curr, this.m_UseFullRange) && (!this.PreserveCollinear || !this.Pt2IsBetweenPt1AndPt3(E.Prev.Curr, E.Curr, E.Next.Curr)))
|
|
{
|
|
//Collinear edges are allowed for open paths but in closed paths
|
|
//the default is to merge adjacent collinear edges into a single edge.
|
|
//However, if the PreserveCollinear property is enabled, only overlapping
|
|
//collinear edges (ie spikes) will be removed from closed paths.
|
|
if (E == eStart)
|
|
eStart = E.Next;
|
|
E = this.RemoveEdge(E);
|
|
E = E.Prev;
|
|
eLoopStop = E;
|
|
continue;
|
|
}
|
|
E = E.Next;
|
|
if (E == eLoopStop)
|
|
break;
|
|
}
|
|
if ((!Closed && (E == E.Next)) || (Closed && (E.Prev == E.Next)))
|
|
return false;
|
|
if (!Closed)
|
|
{
|
|
this.m_HasOpenPaths = true;
|
|
eStart.Prev.OutIdx = ClipperLib.ClipperBase.Skip;
|
|
}
|
|
//3. Do second stage of edge initialization ...
|
|
var eHighest = eStart;
|
|
E = eStart;
|
|
do {
|
|
this.InitEdge2(E, polyType);
|
|
E = E.Next;
|
|
if (IsFlat && E.Curr.Y != eStart.Curr.Y)
|
|
IsFlat = false;
|
|
}
|
|
while (E != eStart)
|
|
//4. Finally, add edge bounds to LocalMinima list ...
|
|
//Totally flat paths must be handled differently when adding them
|
|
//to LocalMinima list to avoid endless loops etc ...
|
|
if (IsFlat)
|
|
{
|
|
if (Closed)
|
|
return false;
|
|
E.Prev.OutIdx = ClipperLib.ClipperBase.Skip;
|
|
if (E.Prev.Bot.X < E.Prev.Top.X)
|
|
this.ReverseHorizontal(E.Prev);
|
|
var locMin = new ClipperLib.LocalMinima();
|
|
locMin.Next = null;
|
|
locMin.Y = E.Bot.Y;
|
|
locMin.LeftBound = null;
|
|
locMin.RightBound = E;
|
|
locMin.RightBound.Side = ClipperLib.EdgeSide.esRight;
|
|
locMin.RightBound.WindDelta = 0;
|
|
while (E.Next.OutIdx != ClipperLib.ClipperBase.Skip)
|
|
{
|
|
E.NextInLML = E.Next;
|
|
if (E.Bot.X != E.Prev.Top.X)
|
|
this.ReverseHorizontal(E);
|
|
E = E.Next;
|
|
}
|
|
this.InsertLocalMinima(locMin);
|
|
this.m_edges.push(edges);
|
|
return true;
|
|
}
|
|
this.m_edges.push(edges);
|
|
var clockwise;
|
|
var EMin = null;
|
|
for (;;)
|
|
{
|
|
E = this.FindNextLocMin(E);
|
|
if (E == EMin)
|
|
break;
|
|
else if (EMin == null)
|
|
EMin = E;
|
|
//E and E.Prev now share a local minima (left aligned if horizontal).
|
|
//Compare their slopes to find which starts which bound ...
|
|
var locMin = new ClipperLib.LocalMinima();
|
|
locMin.Next = null;
|
|
locMin.Y = E.Bot.Y;
|
|
if (E.Dx < E.Prev.Dx)
|
|
{
|
|
locMin.LeftBound = E.Prev;
|
|
locMin.RightBound = E;
|
|
clockwise = false;
|
|
//Q.nextInLML = Q.prev
|
|
}
|
|
else
|
|
{
|
|
locMin.LeftBound = E;
|
|
locMin.RightBound = E.Prev;
|
|
clockwise = true;
|
|
//Q.nextInLML = Q.next
|
|
}
|
|
locMin.LeftBound.Side = ClipperLib.EdgeSide.esLeft;
|
|
locMin.RightBound.Side = ClipperLib.EdgeSide.esRight;
|
|
if (!Closed)
|
|
locMin.LeftBound.WindDelta = 0;
|
|
else if (locMin.LeftBound.Next == locMin.RightBound)
|
|
locMin.LeftBound.WindDelta = -1;
|
|
else
|
|
locMin.LeftBound.WindDelta = 1;
|
|
locMin.RightBound.WindDelta = -locMin.LeftBound.WindDelta;
|
|
E = this.ProcessBound(locMin.LeftBound, clockwise);
|
|
var E2 = this.ProcessBound(locMin.RightBound, !clockwise);
|
|
if (locMin.LeftBound.OutIdx == ClipperLib.ClipperBase.Skip)
|
|
locMin.LeftBound = null;
|
|
else if (locMin.RightBound.OutIdx == ClipperLib.ClipperBase.Skip)
|
|
locMin.RightBound = null;
|
|
this.InsertLocalMinima(locMin);
|
|
if (!clockwise)
|
|
E = E2;
|
|
}
|
|
return true;
|
|
};
|
|
ClipperLib.ClipperBase.prototype.AddPaths = function (ppg, polyType, closed)
|
|
{
|
|
// console.warn("-------------------------------------------");
|
|
// console.warn(JSON.stringify(ppg));
|
|
var result = false;
|
|
for (var i = 0, ilen = ppg.length; i < ilen; ++i)
|
|
if (this.AddPath(ppg[i], polyType, closed))
|
|
result = true;
|
|
return result;
|
|
};
|
|
//------------------------------------------------------------------------------
|
|
ClipperLib.ClipperBase.prototype.Pt2IsBetweenPt1AndPt3 = function (pt1, pt2, pt3)
|
|
{
|
|
if ((ClipperLib.IntPoint.op_Equality(pt1, pt3)) || (ClipperLib.IntPoint.op_Equality(pt1, pt2)) ||
|
|
(ClipperLib.IntPoint.op_Equality(pt3, pt2)))
|
|
return false;
|
|
else if (pt1.X != pt3.X)
|
|
return (pt2.X > pt1.X) == (pt2.X < pt3.X);
|
|
else
|
|
return (pt2.Y > pt1.Y) == (pt2.Y < pt3.Y);
|
|
};
|
|
ClipperLib.ClipperBase.prototype.RemoveEdge = function (e)
|
|
{
|
|
//removes e from double_linked_list (but without removing from memory)
|
|
e.Prev.Next = e.Next;
|
|
e.Next.Prev = e.Prev;
|
|
var result = e.Next;
|
|
e.Prev = null; //flag as removed (see ClipperBase.Clear)
|
|
return result;
|
|
};
|
|
ClipperLib.ClipperBase.prototype.SetDx = function (e)
|
|
{
|
|
e.Delta.X = (e.Top.X - e.Bot.X);
|
|
e.Delta.Y = (e.Top.Y - e.Bot.Y);
|
|
if (e.Delta.Y === 0) e.Dx = ClipperLib.ClipperBase.horizontal;
|
|
else e.Dx = (e.Delta.X) / (e.Delta.Y);
|
|
};
|
|
ClipperLib.ClipperBase.prototype.InsertLocalMinima = function (newLm)
|
|
{
|
|
if (this.m_MinimaList === null)
|
|
{
|
|
this.m_MinimaList = newLm;
|
|
}
|
|
else if (newLm.Y >= this.m_MinimaList.Y)
|
|
{
|
|
newLm.Next = this.m_MinimaList;
|
|
this.m_MinimaList = newLm;
|
|
}
|
|
else
|
|
{
|
|
var tmpLm = this.m_MinimaList;
|
|
while (tmpLm.Next !== null && (newLm.Y < tmpLm.Next.Y))
|
|
tmpLm = tmpLm.Next;
|
|
newLm.Next = tmpLm.Next;
|
|
tmpLm.Next = newLm;
|
|
}
|
|
};
|
|
ClipperLib.ClipperBase.prototype.PopLocalMinima = function ()
|
|
{
|
|
if (this.m_CurrentLM === null)
|
|
return;
|
|
this.m_CurrentLM = this.m_CurrentLM.Next;
|
|
};
|
|
ClipperLib.ClipperBase.prototype.ReverseHorizontal = function (e)
|
|
{
|
|
//swap horizontal edges' top and bottom x's so they follow the natural
|
|
//progression of the bounds - ie so their xbots will align with the
|
|
//adjoining lower edge. [Helpful in the ProcessHorizontal() method.]
|
|
var tmp = e.Top.X;
|
|
e.Top.X = e.Bot.X;
|
|
e.Bot.X = tmp;
|
|
if (use_xyz)
|
|
{
|
|
tmp = e.Top.Z;
|
|
e.Top.Z = e.Bot.Z;
|
|
e.Bot.Z = tmp;
|
|
}
|
|
};
|
|
ClipperLib.ClipperBase.prototype.Reset = function ()
|
|
{
|
|
this.m_CurrentLM = this.m_MinimaList;
|
|
if (this.m_CurrentLM == null)
|
|
return;
|
|
//ie nothing to process
|
|
//reset all edges ...
|
|
var lm = this.m_MinimaList;
|
|
while (lm != null)
|
|
{
|
|
var e = lm.LeftBound;
|
|
if (e != null)
|
|
{
|
|
//e.Curr = e.Bot;
|
|
e.Curr.X = e.Bot.X;
|
|
e.Curr.Y = e.Bot.Y;
|
|
e.Side = ClipperLib.EdgeSide.esLeft;
|
|
e.OutIdx = ClipperLib.ClipperBase.Unassigned;
|
|
}
|
|
e = lm.RightBound;
|
|
if (e != null)
|
|
{
|
|
//e.Curr = e.Bot;
|
|
e.Curr.X = e.Bot.X;
|
|
e.Curr.Y = e.Bot.Y;
|
|
e.Side = ClipperLib.EdgeSide.esRight;
|
|
e.OutIdx = ClipperLib.ClipperBase.Unassigned;
|
|
}
|
|
lm = lm.Next;
|
|
}
|
|
};
|
|
ClipperLib.Clipper = function (InitOptions) // public Clipper(int InitOptions = 0)
|
|
{
|
|
if (typeof (InitOptions) == "undefined") InitOptions = 0;
|
|
this.m_PolyOuts = null;
|
|
this.m_ClipType = ClipperLib.ClipType.ctIntersection;
|
|
this.m_Scanbeam = null;
|
|
this.m_ActiveEdges = null;
|
|
this.m_SortedEdges = null;
|
|
this.m_IntersectList = null;
|
|
this.m_IntersectNodeComparer = null;
|
|
this.m_ExecuteLocked = false;
|
|
this.m_ClipFillType = ClipperLib.PolyFillType.pftEvenOdd;
|
|
this.m_SubjFillType = ClipperLib.PolyFillType.pftEvenOdd;
|
|
this.m_Joins = null;
|
|
this.m_GhostJoins = null;
|
|
this.m_UsingPolyTree = false;
|
|
this.ReverseSolution = false;
|
|
this.StrictlySimple = false;
|
|
ClipperLib.ClipperBase.call(this);
|
|
this.m_Scanbeam = null;
|
|
this.m_ActiveEdges = null;
|
|
this.m_SortedEdges = null;
|
|
this.m_IntersectList = new Array();
|
|
this.m_IntersectNodeComparer = ClipperLib.MyIntersectNodeSort.Compare;
|
|
this.m_ExecuteLocked = false;
|
|
this.m_UsingPolyTree = false;
|
|
this.m_PolyOuts = new Array();
|
|
this.m_Joins = new Array();
|
|
this.m_GhostJoins = new Array();
|
|
this.ReverseSolution = (1 & InitOptions) !== 0;
|
|
this.StrictlySimple = (2 & InitOptions) !== 0;
|
|
this.PreserveCollinear = (4 & InitOptions) !== 0;
|
|
if (use_xyz)
|
|
{
|
|
this.ZFillFunction = null; // function (IntPoint vert1, IntPoint vert2, ref IntPoint intersectPt);
|
|
}
|
|
};
|
|
ClipperLib.Clipper.ioReverseSolution = 1;
|
|
ClipperLib.Clipper.ioStrictlySimple = 2;
|
|
ClipperLib.Clipper.ioPreserveCollinear = 4;
|
|
|
|
ClipperLib.Clipper.prototype.Clear = function ()
|
|
{
|
|
if (this.m_edges.length === 0)
|
|
return;
|
|
//avoids problems with ClipperBase destructor
|
|
this.DisposeAllPolyPts();
|
|
ClipperLib.ClipperBase.prototype.Clear.call(this);
|
|
};
|
|
|
|
ClipperLib.Clipper.prototype.DisposeScanbeamList = function ()
|
|
{
|
|
while (this.m_Scanbeam !== null)
|
|
{
|
|
var sb2 = this.m_Scanbeam.Next;
|
|
this.m_Scanbeam = null;
|
|
this.m_Scanbeam = sb2;
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.Reset = function ()
|
|
{
|
|
ClipperLib.ClipperBase.prototype.Reset.call(this);
|
|
this.m_Scanbeam = null;
|
|
this.m_ActiveEdges = null;
|
|
this.m_SortedEdges = null;
|
|
|
|
var lm = this.m_MinimaList;
|
|
while (lm !== null)
|
|
{
|
|
this.InsertScanbeam(lm.Y);
|
|
lm = lm.Next;
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.InsertScanbeam = function (Y)
|
|
{
|
|
if (this.m_Scanbeam === null)
|
|
{
|
|
this.m_Scanbeam = new ClipperLib.Scanbeam();
|
|
this.m_Scanbeam.Next = null;
|
|
this.m_Scanbeam.Y = Y;
|
|
}
|
|
else if (Y > this.m_Scanbeam.Y)
|
|
{
|
|
var newSb = new ClipperLib.Scanbeam();
|
|
newSb.Y = Y;
|
|
newSb.Next = this.m_Scanbeam;
|
|
this.m_Scanbeam = newSb;
|
|
}
|
|
else
|
|
{
|
|
var sb2 = this.m_Scanbeam;
|
|
while (sb2.Next !== null && (Y <= sb2.Next.Y))
|
|
sb2 = sb2.Next;
|
|
if (Y == sb2.Y)
|
|
return;
|
|
//ie ignores duplicates
|
|
var newSb = new ClipperLib.Scanbeam();
|
|
newSb.Y = Y;
|
|
newSb.Next = sb2.Next;
|
|
sb2.Next = newSb;
|
|
}
|
|
};
|
|
// ************************************
|
|
ClipperLib.Clipper.prototype.Execute = function ()
|
|
{
|
|
var a = arguments,
|
|
alen = a.length,
|
|
ispolytree = a[1] instanceof ClipperLib.PolyTree;
|
|
if (alen == 4 && !ispolytree) // function (clipType, solution, subjFillType, clipFillType)
|
|
{
|
|
var clipType = a[0],
|
|
solution = a[1],
|
|
subjFillType = a[2],
|
|
clipFillType = a[3];
|
|
if (this.m_ExecuteLocked)
|
|
return false;
|
|
if (this.m_HasOpenPaths)
|
|
//ClipperLib.Error("Error: PolyTree struct is need for open path clipping.");
|
|
this.m_ExecuteLocked = true;
|
|
ClipperLib.Clear(solution);
|
|
this.m_SubjFillType = subjFillType;
|
|
this.m_ClipFillType = clipFillType;
|
|
this.m_ClipType = clipType;
|
|
this.m_UsingPolyTree = false;
|
|
try
|
|
{
|
|
var succeeded = this.ExecuteInternal();
|
|
//build the return polygons ...
|
|
if (succeeded) this.BuildResult(solution);
|
|
}
|
|
finally
|
|
{
|
|
this.DisposeAllPolyPts();
|
|
this.m_ExecuteLocked = false;
|
|
}
|
|
return succeeded;
|
|
}
|
|
else if (alen == 4 && ispolytree) // function (clipType, polytree, subjFillType, clipFillType)
|
|
{
|
|
var clipType = a[0],
|
|
polytree = a[1],
|
|
subjFillType = a[2],
|
|
clipFillType = a[3];
|
|
if (this.m_ExecuteLocked)
|
|
return false;
|
|
this.m_ExecuteLocked = true;
|
|
this.m_SubjFillType = subjFillType;
|
|
this.m_ClipFillType = clipFillType;
|
|
this.m_ClipType = clipType;
|
|
this.m_UsingPolyTree = true;
|
|
try
|
|
{
|
|
var succeeded = this.ExecuteInternal();
|
|
//build the return polygons ...
|
|
if (succeeded) this.BuildResult2(polytree);
|
|
}
|
|
finally
|
|
{
|
|
this.DisposeAllPolyPts();
|
|
this.m_ExecuteLocked = false;
|
|
}
|
|
return succeeded;
|
|
}
|
|
else if (alen == 2 && !ispolytree) // function (clipType, solution)
|
|
{
|
|
var clipType = a[0],
|
|
solution = a[1];
|
|
return this.Execute(clipType, solution, ClipperLib.PolyFillType.pftEvenOdd, ClipperLib.PolyFillType.pftEvenOdd);
|
|
}
|
|
else if (alen == 2 && ispolytree) // function (clipType, polytree)
|
|
{
|
|
var clipType = a[0],
|
|
polytree = a[1];
|
|
return this.Execute(clipType, polytree, ClipperLib.PolyFillType.pftEvenOdd, ClipperLib.PolyFillType.pftEvenOdd);
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.FixHoleLinkage = function (outRec)
|
|
{
|
|
//skip if an outermost polygon or
|
|
//already already points to the correct FirstLeft ...
|
|
if (outRec.FirstLeft === null || (outRec.IsHole != outRec.FirstLeft.IsHole && outRec.FirstLeft.Pts !== null))
|
|
return;
|
|
var orfl = outRec.FirstLeft;
|
|
while (orfl !== null && ((orfl.IsHole == outRec.IsHole) || orfl.Pts === null))
|
|
orfl = orfl.FirstLeft;
|
|
outRec.FirstLeft = orfl;
|
|
};
|
|
ClipperLib.Clipper.prototype.ExecuteInternal = function ()
|
|
{
|
|
try
|
|
{
|
|
this.Reset();
|
|
if (this.m_CurrentLM === null)
|
|
return false;
|
|
var botY = this.PopScanbeam();
|
|
do {
|
|
this.InsertLocalMinimaIntoAEL(botY);
|
|
ClipperLib.Clear(this.m_GhostJoins);
|
|
this.ProcessHorizontals(false);
|
|
if (this.m_Scanbeam === null)
|
|
break;
|
|
var topY = this.PopScanbeam();
|
|
//console.warn("botY:" + botY + ", topY:" + topY);
|
|
if (!this.ProcessIntersections(botY, topY))
|
|
return false;
|
|
this.ProcessEdgesAtTopOfScanbeam(topY);
|
|
botY = topY;
|
|
}
|
|
while (this.m_Scanbeam !== null || this.m_CurrentLM !== null)
|
|
//fix orientations ...
|
|
for (var i = 0, ilen = this.m_PolyOuts.length; i < ilen; i++)
|
|
{
|
|
var outRec = this.m_PolyOuts[i];
|
|
if (outRec.Pts === null || outRec.IsOpen)
|
|
continue;
|
|
if ((outRec.IsHole ^ this.ReverseSolution) == (this.Area(outRec) > 0))
|
|
this.ReversePolyPtLinks(outRec.Pts);
|
|
}
|
|
this.JoinCommonEdges();
|
|
for (var i = 0, ilen = this.m_PolyOuts.length; i < ilen; i++)
|
|
{
|
|
var outRec = this.m_PolyOuts[i];
|
|
if (outRec.Pts !== null && !outRec.IsOpen)
|
|
this.FixupOutPolygon(outRec);
|
|
}
|
|
if (this.StrictlySimple)
|
|
this.DoSimplePolygons();
|
|
return true;
|
|
}
|
|
finally
|
|
{
|
|
ClipperLib.Clear(this.m_Joins);
|
|
ClipperLib.Clear(this.m_GhostJoins);
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.PopScanbeam = function ()
|
|
{
|
|
var Y = this.m_Scanbeam.Y;
|
|
var sb2 = this.m_Scanbeam;
|
|
this.m_Scanbeam = this.m_Scanbeam.Next;
|
|
sb2 = null;
|
|
return Y;
|
|
};
|
|
ClipperLib.Clipper.prototype.DisposeAllPolyPts = function ()
|
|
{
|
|
for (var i = 0, ilen = this.m_PolyOuts.length; i < ilen; ++i)
|
|
this.DisposeOutRec(i);
|
|
ClipperLib.Clear(this.m_PolyOuts);
|
|
};
|
|
ClipperLib.Clipper.prototype.DisposeOutRec = function (index)
|
|
{
|
|
var outRec = this.m_PolyOuts[index];
|
|
if (outRec.Pts !== null)
|
|
this.DisposeOutPts(outRec.Pts);
|
|
outRec = null;
|
|
this.m_PolyOuts[index] = null;
|
|
};
|
|
ClipperLib.Clipper.prototype.DisposeOutPts = function (pp)
|
|
{
|
|
if (pp === null)
|
|
return;
|
|
var tmpPp = null;
|
|
pp.Prev.Next = null;
|
|
while (pp !== null)
|
|
{
|
|
tmpPp = pp;
|
|
pp = pp.Next;
|
|
tmpPp = null;
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.AddJoin = function (Op1, Op2, OffPt)
|
|
{
|
|
var j = new ClipperLib.Join();
|
|
j.OutPt1 = Op1;
|
|
j.OutPt2 = Op2;
|
|
//j.OffPt = OffPt;
|
|
j.OffPt.X = OffPt.X;
|
|
j.OffPt.Y = OffPt.Y;
|
|
this.m_Joins.push(j);
|
|
};
|
|
ClipperLib.Clipper.prototype.AddGhostJoin = function (Op, OffPt)
|
|
{
|
|
var j = new ClipperLib.Join();
|
|
j.OutPt1 = Op;
|
|
//j.OffPt = OffPt;
|
|
j.OffPt.X = OffPt.X;
|
|
j.OffPt.Y = OffPt.Y;
|
|
this.m_GhostJoins.push(j);
|
|
};
|
|
if (use_xyz)
|
|
{
|
|
ClipperLib.Clipper.prototype.SetZ = function (pt, e)
|
|
{
|
|
pt.Z = 0;
|
|
if (this.ZFillFunction !== null)
|
|
{
|
|
//put the 'preferred' point as first parameter ...
|
|
if (e.OutIdx < 0)
|
|
this.ZFillFunction(e.Bot, e.Top, pt); //outside a path so presume entering
|
|
else
|
|
this.ZFillFunction(e.Top, e.Bot, pt); //inside a path so presume exiting
|
|
}
|
|
};
|
|
//------------------------------------------------------------------------------
|
|
}
|
|
ClipperLib.Clipper.prototype.InsertLocalMinimaIntoAEL = function (botY)
|
|
{
|
|
while (this.m_CurrentLM !== null && (this.m_CurrentLM.Y == botY))
|
|
{
|
|
var lb = this.m_CurrentLM.LeftBound;
|
|
var rb = this.m_CurrentLM.RightBound;
|
|
this.PopLocalMinima();
|
|
var Op1 = null;
|
|
if (lb === null)
|
|
{
|
|
this.InsertEdgeIntoAEL(rb, null);
|
|
this.SetWindingCount(rb);
|
|
if (this.IsContributing(rb))
|
|
Op1 = this.AddOutPt(rb, rb.Bot);
|
|
}
|
|
else if (rb == null)
|
|
{
|
|
this.InsertEdgeIntoAEL(lb, null);
|
|
this.SetWindingCount(lb);
|
|
if (this.IsContributing(lb))
|
|
Op1 = this.AddOutPt(lb, lb.Bot);
|
|
this.InsertScanbeam(lb.Top.Y);
|
|
}
|
|
else
|
|
{
|
|
this.InsertEdgeIntoAEL(lb, null);
|
|
this.InsertEdgeIntoAEL(rb, lb);
|
|
this.SetWindingCount(lb);
|
|
rb.WindCnt = lb.WindCnt;
|
|
rb.WindCnt2 = lb.WindCnt2;
|
|
if (this.IsContributing(lb))
|
|
Op1 = this.AddLocalMinPoly(lb, rb, lb.Bot);
|
|
this.InsertScanbeam(lb.Top.Y);
|
|
}
|
|
if (rb != null)
|
|
{
|
|
if (ClipperLib.ClipperBase.IsHorizontal(rb))
|
|
this.AddEdgeToSEL(rb);
|
|
else
|
|
this.InsertScanbeam(rb.Top.Y);
|
|
}
|
|
if (lb == null || rb == null) continue;
|
|
//if output polygons share an Edge with a horizontal rb, they'll need joining later ...
|
|
if (Op1 !== null && ClipperLib.ClipperBase.IsHorizontal(rb) && this.m_GhostJoins.length > 0 && rb.WindDelta !== 0)
|
|
{
|
|
for (var i = 0, ilen = this.m_GhostJoins.length; i < ilen; i++)
|
|
{
|
|
//if the horizontal Rb and a 'ghost' horizontal overlap, then convert
|
|
//the 'ghost' join to a real join ready for later ...
|
|
var j = this.m_GhostJoins[i];
|
|
if (this.HorzSegmentsOverlap(j.OutPt1.Pt, j.OffPt, rb.Bot, rb.Top))
|
|
this.AddJoin(j.OutPt1, Op1, j.OffPt);
|
|
}
|
|
}
|
|
if (lb.OutIdx >= 0 && lb.PrevInAEL !== null &&
|
|
lb.PrevInAEL.Curr.X == lb.Bot.X &&
|
|
lb.PrevInAEL.OutIdx >= 0 &&
|
|
ClipperLib.ClipperBase.SlopesEqual(lb.PrevInAEL, lb, this.m_UseFullRange) &&
|
|
lb.WindDelta !== 0 && lb.PrevInAEL.WindDelta !== 0)
|
|
{
|
|
var Op2 = this.AddOutPt(lb.PrevInAEL, lb.Bot);
|
|
this.AddJoin(Op1, Op2, lb.Top);
|
|
}
|
|
if (lb.NextInAEL != rb)
|
|
{
|
|
if (rb.OutIdx >= 0 && rb.PrevInAEL.OutIdx >= 0 &&
|
|
ClipperLib.ClipperBase.SlopesEqual(rb.PrevInAEL, rb, this.m_UseFullRange) &&
|
|
rb.WindDelta !== 0 && rb.PrevInAEL.WindDelta !== 0)
|
|
{
|
|
var Op2 = this.AddOutPt(rb.PrevInAEL, rb.Bot);
|
|
this.AddJoin(Op1, Op2, rb.Top);
|
|
}
|
|
var e = lb.NextInAEL;
|
|
if (e !== null)
|
|
while (e != rb)
|
|
{
|
|
//nb: For calculating winding counts etc, IntersectEdges() assumes
|
|
//that param1 will be to the right of param2 ABOVE the intersection ...
|
|
this.IntersectEdges(rb, e, lb.Curr, false);
|
|
//order important here
|
|
e = e.NextInAEL;
|
|
}
|
|
}
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.InsertEdgeIntoAEL = function (edge, startEdge)
|
|
{
|
|
if (this.m_ActiveEdges === null)
|
|
{
|
|
edge.PrevInAEL = null;
|
|
edge.NextInAEL = null;
|
|
this.m_ActiveEdges = edge;
|
|
}
|
|
else if (startEdge === null && this.E2InsertsBeforeE1(this.m_ActiveEdges, edge))
|
|
{
|
|
edge.PrevInAEL = null;
|
|
edge.NextInAEL = this.m_ActiveEdges;
|
|
this.m_ActiveEdges.PrevInAEL = edge;
|
|
this.m_ActiveEdges = edge;
|
|
}
|
|
else
|
|
{
|
|
if (startEdge === null)
|
|
startEdge = this.m_ActiveEdges;
|
|
while (startEdge.NextInAEL !== null && !this.E2InsertsBeforeE1(startEdge.NextInAEL, edge))
|
|
startEdge = startEdge.NextInAEL;
|
|
edge.NextInAEL = startEdge.NextInAEL;
|
|
if (startEdge.NextInAEL !== null)
|
|
startEdge.NextInAEL.PrevInAEL = edge;
|
|
edge.PrevInAEL = startEdge;
|
|
startEdge.NextInAEL = edge;
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.E2InsertsBeforeE1 = function (e1, e2)
|
|
{
|
|
if (e2.Curr.X == e1.Curr.X)
|
|
{
|
|
if (e2.Top.Y > e1.Top.Y)
|
|
return e2.Top.X < ClipperLib.Clipper.TopX(e1, e2.Top.Y);
|
|
else
|
|
return e1.Top.X > ClipperLib.Clipper.TopX(e2, e1.Top.Y);
|
|
}
|
|
else
|
|
return e2.Curr.X < e1.Curr.X;
|
|
};
|
|
ClipperLib.Clipper.prototype.IsEvenOddFillType = function (edge)
|
|
{
|
|
if (edge.PolyTyp == ClipperLib.PolyType.ptSubject)
|
|
return this.m_SubjFillType == ClipperLib.PolyFillType.pftEvenOdd;
|
|
else
|
|
return this.m_ClipFillType == ClipperLib.PolyFillType.pftEvenOdd;
|
|
};
|
|
ClipperLib.Clipper.prototype.IsEvenOddAltFillType = function (edge)
|
|
{
|
|
if (edge.PolyTyp == ClipperLib.PolyType.ptSubject)
|
|
return this.m_ClipFillType == ClipperLib.PolyFillType.pftEvenOdd;
|
|
else
|
|
return this.m_SubjFillType == ClipperLib.PolyFillType.pftEvenOdd;
|
|
};
|
|
ClipperLib.Clipper.prototype.IsContributing = function (edge)
|
|
{
|
|
var pft, pft2;
|
|
if (edge.PolyTyp == ClipperLib.PolyType.ptSubject)
|
|
{
|
|
pft = this.m_SubjFillType;
|
|
pft2 = this.m_ClipFillType;
|
|
}
|
|
else
|
|
{
|
|
pft = this.m_ClipFillType;
|
|
pft2 = this.m_SubjFillType;
|
|
}
|
|
switch (pft)
|
|
{
|
|
case ClipperLib.PolyFillType.pftEvenOdd:
|
|
if (edge.WindDelta === 0 && edge.WindCnt != 1)
|
|
return false;
|
|
break;
|
|
case ClipperLib.PolyFillType.pftNonZero:
|
|
if (Math.abs(edge.WindCnt) != 1)
|
|
return false;
|
|
break;
|
|
case ClipperLib.PolyFillType.pftPositive:
|
|
if (edge.WindCnt != 1)
|
|
return false;
|
|
break;
|
|
default:
|
|
if (edge.WindCnt != -1)
|
|
return false;
|
|
break;
|
|
}
|
|
switch (this.m_ClipType)
|
|
{
|
|
case ClipperLib.ClipType.ctIntersection:
|
|
switch (pft2)
|
|
{
|
|
case ClipperLib.PolyFillType.pftEvenOdd:
|
|
case ClipperLib.PolyFillType.pftNonZero:
|
|
return (edge.WindCnt2 !== 0);
|
|
case ClipperLib.PolyFillType.pftPositive:
|
|
return (edge.WindCnt2 > 0);
|
|
default:
|
|
return (edge.WindCnt2 < 0);
|
|
}
|
|
case ClipperLib.ClipType.ctUnion:
|
|
switch (pft2)
|
|
{
|
|
case ClipperLib.PolyFillType.pftEvenOdd:
|
|
case ClipperLib.PolyFillType.pftNonZero:
|
|
return (edge.WindCnt2 === 0);
|
|
case ClipperLib.PolyFillType.pftPositive:
|
|
return (edge.WindCnt2 <= 0);
|
|
default:
|
|
return (edge.WindCnt2 >= 0);
|
|
}
|
|
case ClipperLib.ClipType.ctDifference:
|
|
if (edge.PolyTyp == ClipperLib.PolyType.ptSubject)
|
|
switch (pft2)
|
|
{
|
|
case ClipperLib.PolyFillType.pftEvenOdd:
|
|
case ClipperLib.PolyFillType.pftNonZero:
|
|
return (edge.WindCnt2 === 0);
|
|
case ClipperLib.PolyFillType.pftPositive:
|
|
return (edge.WindCnt2 <= 0);
|
|
default:
|
|
return (edge.WindCnt2 >= 0);
|
|
}
|
|
else
|
|
switch (pft2)
|
|
{
|
|
case ClipperLib.PolyFillType.pftEvenOdd:
|
|
case ClipperLib.PolyFillType.pftNonZero:
|
|
return (edge.WindCnt2 !== 0);
|
|
case ClipperLib.PolyFillType.pftPositive:
|
|
return (edge.WindCnt2 > 0);
|
|
default:
|
|
return (edge.WindCnt2 < 0);
|
|
}
|
|
case ClipperLib.ClipType.ctXor:
|
|
if (edge.WindDelta === 0)
|
|
switch (pft2)
|
|
{
|
|
case ClipperLib.PolyFillType.pftEvenOdd:
|
|
case ClipperLib.PolyFillType.pftNonZero:
|
|
return (edge.WindCnt2 === 0);
|
|
case ClipperLib.PolyFillType.pftPositive:
|
|
return (edge.WindCnt2 <= 0);
|
|
default:
|
|
return (edge.WindCnt2 >= 0);
|
|
}
|
|
else
|
|
return true;
|
|
}
|
|
return true;
|
|
};
|
|
ClipperLib.Clipper.prototype.SetWindingCount = function (edge)
|
|
{
|
|
var e = edge.PrevInAEL;
|
|
//find the edge of the same polytype that immediately preceeds 'edge' in AEL
|
|
while (e !== null && ((e.PolyTyp != edge.PolyTyp) || (e.WindDelta === 0)))
|
|
e = e.PrevInAEL;
|
|
if (e === null)
|
|
{
|
|
edge.WindCnt = (edge.WindDelta === 0 ? 1 : edge.WindDelta);
|
|
edge.WindCnt2 = 0;
|
|
e = this.m_ActiveEdges;
|
|
//ie get ready to calc WindCnt2
|
|
}
|
|
else if (edge.WindDelta === 0 && this.m_ClipType != ClipperLib.ClipType.ctUnion)
|
|
{
|
|
edge.WindCnt = 1;
|
|
edge.WindCnt2 = e.WindCnt2;
|
|
e = e.NextInAEL;
|
|
//ie get ready to calc WindCnt2
|
|
}
|
|
else if (this.IsEvenOddFillType(edge))
|
|
{
|
|
//EvenOdd filling ...
|
|
if (edge.WindDelta === 0)
|
|
{
|
|
//are we inside a subj polygon ...
|
|
var Inside = true;
|
|
var e2 = e.PrevInAEL;
|
|
while (e2 !== null)
|
|
{
|
|
if (e2.PolyTyp == e.PolyTyp && e2.WindDelta !== 0)
|
|
Inside = !Inside;
|
|
e2 = e2.PrevInAEL;
|
|
}
|
|
edge.WindCnt = (Inside ? 0 : 1);
|
|
}
|
|
else
|
|
{
|
|
edge.WindCnt = edge.WindDelta;
|
|
}
|
|
edge.WindCnt2 = e.WindCnt2;
|
|
e = e.NextInAEL;
|
|
//ie get ready to calc WindCnt2
|
|
}
|
|
else
|
|
{
|
|
//nonZero, Positive or Negative filling ...
|
|
if (e.WindCnt * e.WindDelta < 0)
|
|
{
|
|
//prev edge is 'decreasing' WindCount (WC) toward zero
|
|
//so we're outside the previous polygon ...
|
|
if (Math.abs(e.WindCnt) > 1)
|
|
{
|
|
//outside prev poly but still inside another.
|
|
//when reversing direction of prev poly use the same WC
|
|
if (e.WindDelta * edge.WindDelta < 0)
|
|
edge.WindCnt = e.WindCnt;
|
|
else
|
|
edge.WindCnt = e.WindCnt + edge.WindDelta;
|
|
}
|
|
else
|
|
edge.WindCnt = (edge.WindDelta === 0 ? 1 : edge.WindDelta);
|
|
}
|
|
else
|
|
{
|
|
//prev edge is 'increasing' WindCount (WC) away from zero
|
|
//so we're inside the previous polygon ...
|
|
if (edge.WindDelta === 0)
|
|
edge.WindCnt = (e.WindCnt < 0 ? e.WindCnt - 1 : e.WindCnt + 1);
|
|
else if (e.WindDelta * edge.WindDelta < 0)
|
|
edge.WindCnt = e.WindCnt;
|
|
else
|
|
edge.WindCnt = e.WindCnt + edge.WindDelta;
|
|
}
|
|
edge.WindCnt2 = e.WindCnt2;
|
|
e = e.NextInAEL;
|
|
//ie get ready to calc WindCnt2
|
|
}
|
|
//update WindCnt2 ...
|
|
if (this.IsEvenOddAltFillType(edge))
|
|
{
|
|
//EvenOdd filling ...
|
|
while (e != edge)
|
|
{
|
|
if (e.WindDelta !== 0)
|
|
edge.WindCnt2 = (edge.WindCnt2 === 0 ? 1 : 0);
|
|
e = e.NextInAEL;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
//nonZero, Positive or Negative filling ...
|
|
while (e != edge)
|
|
{
|
|
edge.WindCnt2 += e.WindDelta;
|
|
e = e.NextInAEL;
|
|
}
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.AddEdgeToSEL = function (edge)
|
|
{
|
|
//SEL pointers in PEdge are reused to build a list of horizontal edges.
|
|
//However, we don't need to worry about order with horizontal edge processing.
|
|
if (this.m_SortedEdges === null)
|
|
{
|
|
this.m_SortedEdges = edge;
|
|
edge.PrevInSEL = null;
|
|
edge.NextInSEL = null;
|
|
}
|
|
else
|
|
{
|
|
edge.NextInSEL = this.m_SortedEdges;
|
|
edge.PrevInSEL = null;
|
|
this.m_SortedEdges.PrevInSEL = edge;
|
|
this.m_SortedEdges = edge;
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.CopyAELToSEL = function ()
|
|
{
|
|
var e = this.m_ActiveEdges;
|
|
this.m_SortedEdges = e;
|
|
while (e !== null)
|
|
{
|
|
e.PrevInSEL = e.PrevInAEL;
|
|
e.NextInSEL = e.NextInAEL;
|
|
e = e.NextInAEL;
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.SwapPositionsInAEL = function (edge1, edge2)
|
|
{
|
|
//check that one or other edge hasn't already been removed from AEL ...
|
|
if (edge1.NextInAEL == edge1.PrevInAEL || edge2.NextInAEL == edge2.PrevInAEL)
|
|
return;
|
|
if (edge1.NextInAEL == edge2)
|
|
{
|
|
var next = edge2.NextInAEL;
|
|
if (next !== null)
|
|
next.PrevInAEL = edge1;
|
|
var prev = edge1.PrevInAEL;
|
|
if (prev !== null)
|
|
prev.NextInAEL = edge2;
|
|
edge2.PrevInAEL = prev;
|
|
edge2.NextInAEL = edge1;
|
|
edge1.PrevInAEL = edge2;
|
|
edge1.NextInAEL = next;
|
|
}
|
|
else if (edge2.NextInAEL == edge1)
|
|
{
|
|
var next = edge1.NextInAEL;
|
|
if (next !== null)
|
|
next.PrevInAEL = edge2;
|
|
var prev = edge2.PrevInAEL;
|
|
if (prev !== null)
|
|
prev.NextInAEL = edge1;
|
|
edge1.PrevInAEL = prev;
|
|
edge1.NextInAEL = edge2;
|
|
edge2.PrevInAEL = edge1;
|
|
edge2.NextInAEL = next;
|
|
}
|
|
else
|
|
{
|
|
var next = edge1.NextInAEL;
|
|
var prev = edge1.PrevInAEL;
|
|
edge1.NextInAEL = edge2.NextInAEL;
|
|
if (edge1.NextInAEL !== null)
|
|
edge1.NextInAEL.PrevInAEL = edge1;
|
|
edge1.PrevInAEL = edge2.PrevInAEL;
|
|
if (edge1.PrevInAEL !== null)
|
|
edge1.PrevInAEL.NextInAEL = edge1;
|
|
edge2.NextInAEL = next;
|
|
if (edge2.NextInAEL !== null)
|
|
edge2.NextInAEL.PrevInAEL = edge2;
|
|
edge2.PrevInAEL = prev;
|
|
if (edge2.PrevInAEL !== null)
|
|
edge2.PrevInAEL.NextInAEL = edge2;
|
|
}
|
|
if (edge1.PrevInAEL === null)
|
|
this.m_ActiveEdges = edge1;
|
|
else if (edge2.PrevInAEL === null)
|
|
this.m_ActiveEdges = edge2;
|
|
};
|
|
ClipperLib.Clipper.prototype.SwapPositionsInSEL = function (edge1, edge2)
|
|
{
|
|
if (edge1.NextInSEL === null && edge1.PrevInSEL === null)
|
|
return;
|
|
if (edge2.NextInSEL === null && edge2.PrevInSEL === null)
|
|
return;
|
|
if (edge1.NextInSEL == edge2)
|
|
{
|
|
var next = edge2.NextInSEL;
|
|
if (next !== null)
|
|
next.PrevInSEL = edge1;
|
|
var prev = edge1.PrevInSEL;
|
|
if (prev !== null)
|
|
prev.NextInSEL = edge2;
|
|
edge2.PrevInSEL = prev;
|
|
edge2.NextInSEL = edge1;
|
|
edge1.PrevInSEL = edge2;
|
|
edge1.NextInSEL = next;
|
|
}
|
|
else if (edge2.NextInSEL == edge1)
|
|
{
|
|
var next = edge1.NextInSEL;
|
|
if (next !== null)
|
|
next.PrevInSEL = edge2;
|
|
var prev = edge2.PrevInSEL;
|
|
if (prev !== null)
|
|
prev.NextInSEL = edge1;
|
|
edge1.PrevInSEL = prev;
|
|
edge1.NextInSEL = edge2;
|
|
edge2.PrevInSEL = edge1;
|
|
edge2.NextInSEL = next;
|
|
}
|
|
else
|
|
{
|
|
var next = edge1.NextInSEL;
|
|
var prev = edge1.PrevInSEL;
|
|
edge1.NextInSEL = edge2.NextInSEL;
|
|
if (edge1.NextInSEL !== null)
|
|
edge1.NextInSEL.PrevInSEL = edge1;
|
|
edge1.PrevInSEL = edge2.PrevInSEL;
|
|
if (edge1.PrevInSEL !== null)
|
|
edge1.PrevInSEL.NextInSEL = edge1;
|
|
edge2.NextInSEL = next;
|
|
if (edge2.NextInSEL !== null)
|
|
edge2.NextInSEL.PrevInSEL = edge2;
|
|
edge2.PrevInSEL = prev;
|
|
if (edge2.PrevInSEL !== null)
|
|
edge2.PrevInSEL.NextInSEL = edge2;
|
|
}
|
|
if (edge1.PrevInSEL === null)
|
|
this.m_SortedEdges = edge1;
|
|
else if (edge2.PrevInSEL === null)
|
|
this.m_SortedEdges = edge2;
|
|
};
|
|
ClipperLib.Clipper.prototype.AddLocalMaxPoly = function (e1, e2, pt)
|
|
{
|
|
this.AddOutPt(e1, pt);
|
|
if (e2.WindDelta == 0) this.AddOutPt(e2, pt);
|
|
if (e1.OutIdx == e2.OutIdx)
|
|
{
|
|
e1.OutIdx = -1;
|
|
e2.OutIdx = -1;
|
|
}
|
|
else if (e1.OutIdx < e2.OutIdx)
|
|
this.AppendPolygon(e1, e2);
|
|
else
|
|
this.AppendPolygon(e2, e1);
|
|
};
|
|
ClipperLib.Clipper.prototype.AddLocalMinPoly = function (e1, e2, pt)
|
|
{
|
|
var result;
|
|
var e, prevE;
|
|
if (ClipperLib.ClipperBase.IsHorizontal(e2) || (e1.Dx > e2.Dx))
|
|
{
|
|
result = this.AddOutPt(e1, pt);
|
|
e2.OutIdx = e1.OutIdx;
|
|
e1.Side = ClipperLib.EdgeSide.esLeft;
|
|
e2.Side = ClipperLib.EdgeSide.esRight;
|
|
e = e1;
|
|
if (e.PrevInAEL == e2)
|
|
prevE = e2.PrevInAEL;
|
|
else
|
|
prevE = e.PrevInAEL;
|
|
}
|
|
else
|
|
{
|
|
result = this.AddOutPt(e2, pt);
|
|
e1.OutIdx = e2.OutIdx;
|
|
e1.Side = ClipperLib.EdgeSide.esRight;
|
|
e2.Side = ClipperLib.EdgeSide.esLeft;
|
|
e = e2;
|
|
if (e.PrevInAEL == e1)
|
|
prevE = e1.PrevInAEL;
|
|
else
|
|
prevE = e.PrevInAEL;
|
|
}
|
|
if (prevE !== null && prevE.OutIdx >= 0 && (ClipperLib.Clipper.TopX(prevE, pt.Y) == ClipperLib.Clipper.TopX(e, pt.Y)) && ClipperLib.ClipperBase.SlopesEqual(e, prevE, this.m_UseFullRange) && (e.WindDelta !== 0) && (prevE.WindDelta !== 0))
|
|
{
|
|
var outPt = this.AddOutPt(prevE, pt);
|
|
this.AddJoin(result, outPt, e.Top);
|
|
}
|
|
return result;
|
|
};
|
|
ClipperLib.Clipper.prototype.CreateOutRec = function ()
|
|
{
|
|
var result = new ClipperLib.OutRec();
|
|
result.Idx = -1;
|
|
result.IsHole = false;
|
|
result.IsOpen = false;
|
|
result.FirstLeft = null;
|
|
result.Pts = null;
|
|
result.BottomPt = null;
|
|
result.PolyNode = null;
|
|
this.m_PolyOuts.push(result);
|
|
result.Idx = this.m_PolyOuts.length - 1;
|
|
return result;
|
|
};
|
|
ClipperLib.Clipper.prototype.AddOutPt = function (e, pt)
|
|
{
|
|
var ToFront = (e.Side == ClipperLib.EdgeSide.esLeft);
|
|
if (e.OutIdx < 0)
|
|
{
|
|
var outRec = this.CreateOutRec();
|
|
outRec.IsOpen = (e.WindDelta === 0);
|
|
var newOp = new ClipperLib.OutPt();
|
|
outRec.Pts = newOp;
|
|
newOp.Idx = outRec.Idx;
|
|
//newOp.Pt = pt;
|
|
newOp.Pt.X = pt.X;
|
|
newOp.Pt.Y = pt.Y;
|
|
newOp.Next = newOp;
|
|
newOp.Prev = newOp;
|
|
if (!outRec.IsOpen)
|
|
this.SetHoleState(e, outRec);
|
|
if (use_xyz)
|
|
{
|
|
if (ClipperLib.IntPoint.op_Equality(pt, e.Bot))
|
|
{
|
|
//newOp.Pt = e.Bot;
|
|
newOp.Pt.X = e.Bot.X;
|
|
newOp.Pt.Y = e.Bot.Y;
|
|
newOp.Pt.Z = e.Bot.Z;
|
|
}
|
|
else if (ClipperLib.IntPoint.op_Equality(pt, e.Top))
|
|
{
|
|
//newOp.Pt = e.Top;
|
|
newOp.Pt.X = e.Top.X;
|
|
newOp.Pt.Y = e.Top.Y;
|
|
newOp.Pt.Z = e.Top.Z;
|
|
}
|
|
else
|
|
this.SetZ(newOp.Pt, e);
|
|
}
|
|
e.OutIdx = outRec.Idx;
|
|
//nb: do this after SetZ !
|
|
return newOp;
|
|
}
|
|
else
|
|
{
|
|
var outRec = this.m_PolyOuts[e.OutIdx];
|
|
//OutRec.Pts is the 'Left-most' point & OutRec.Pts.Prev is the 'Right-most'
|
|
var op = outRec.Pts;
|
|
if (ToFront && ClipperLib.IntPoint.op_Equality(pt, op.Pt))
|
|
return op;
|
|
else if (!ToFront && ClipperLib.IntPoint.op_Equality(pt, op.Prev.Pt))
|
|
return op.Prev;
|
|
var newOp = new ClipperLib.OutPt();
|
|
newOp.Idx = outRec.Idx;
|
|
//newOp.Pt = pt;
|
|
newOp.Pt.X = pt.X;
|
|
newOp.Pt.Y = pt.Y;
|
|
newOp.Next = op;
|
|
newOp.Prev = op.Prev;
|
|
newOp.Prev.Next = newOp;
|
|
op.Prev = newOp;
|
|
if (ToFront)
|
|
outRec.Pts = newOp;
|
|
if (use_xyz)
|
|
{
|
|
if (ClipperLib.IntPoint.op_Equality(pt, e.Bot))
|
|
{
|
|
//newOp.Pt = e.Bot;
|
|
newOp.Pt.X = e.Bot.X;
|
|
newOp.Pt.Y = e.Bot.Y;
|
|
newOp.Pt.Z = e.Bot.Z;
|
|
}
|
|
else if (ClipperLib.IntPoint.op_Equality(pt, e.Top))
|
|
{
|
|
//newOp.Pt = e.Top;
|
|
newOp.Pt.X = e.Top.X;
|
|
newOp.Pt.Y = e.Top.Y;
|
|
newOp.Pt.Z = e.Top.Z;
|
|
}
|
|
else
|
|
this.SetZ(newOp.Pt, e);
|
|
}
|
|
return newOp;
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.SwapPoints = function (pt1, pt2)
|
|
{
|
|
var tmp = new ClipperLib.IntPoint(pt1.Value);
|
|
//pt1.Value = pt2.Value;
|
|
pt1.Value.X = pt2.Value.X;
|
|
pt1.Value.Y = pt2.Value.Y;
|
|
//pt2.Value = tmp;
|
|
pt2.Value.X = tmp.X;
|
|
pt2.Value.Y = tmp.Y;
|
|
};
|
|
ClipperLib.Clipper.prototype.HorzSegmentsOverlap = function (Pt1a, Pt1b, Pt2a, Pt2b)
|
|
{
|
|
//precondition: both segments are horizontal
|
|
if ((Pt1a.X > Pt2a.X) == (Pt1a.X < Pt2b.X))
|
|
return true;
|
|
else if ((Pt1b.X > Pt2a.X) == (Pt1b.X < Pt2b.X))
|
|
return true;
|
|
else if ((Pt2a.X > Pt1a.X) == (Pt2a.X < Pt1b.X))
|
|
return true;
|
|
else if ((Pt2b.X > Pt1a.X) == (Pt2b.X < Pt1b.X))
|
|
return true;
|
|
else if ((Pt1a.X == Pt2a.X) && (Pt1b.X == Pt2b.X))
|
|
return true;
|
|
else if ((Pt1a.X == Pt2b.X) && (Pt1b.X == Pt2a.X))
|
|
return true;
|
|
else
|
|
return false;
|
|
};
|
|
ClipperLib.Clipper.prototype.InsertPolyPtBetween = function (p1, p2, pt)
|
|
{
|
|
var result = new ClipperLib.OutPt();
|
|
//result.Pt = pt;
|
|
result.Pt.X = pt.X;
|
|
result.Pt.Y = pt.Y;
|
|
if (p2 == p1.Next)
|
|
{
|
|
p1.Next = result;
|
|
p2.Prev = result;
|
|
result.Next = p2;
|
|
result.Prev = p1;
|
|
}
|
|
else
|
|
{
|
|
p2.Next = result;
|
|
p1.Prev = result;
|
|
result.Next = p1;
|
|
result.Prev = p2;
|
|
}
|
|
return result;
|
|
};
|
|
ClipperLib.Clipper.prototype.SetHoleState = function (e, outRec)
|
|
{
|
|
var isHole = false;
|
|
var e2 = e.PrevInAEL;
|
|
while (e2 !== null)
|
|
{
|
|
if (e2.OutIdx >= 0 && e2.WindDelta != 0)
|
|
{
|
|
isHole = !isHole;
|
|
if (outRec.FirstLeft === null)
|
|
outRec.FirstLeft = this.m_PolyOuts[e2.OutIdx];
|
|
}
|
|
e2 = e2.PrevInAEL;
|
|
}
|
|
if (isHole)
|
|
outRec.IsHole = true;
|
|
};
|
|
ClipperLib.Clipper.prototype.GetDx = function (pt1, pt2)
|
|
{
|
|
if (pt1.Y == pt2.Y)
|
|
return ClipperLib.ClipperBase.horizontal;
|
|
else
|
|
return (pt2.X - pt1.X) / (pt2.Y - pt1.Y);
|
|
};
|
|
ClipperLib.Clipper.prototype.FirstIsBottomPt = function (btmPt1, btmPt2)
|
|
{
|
|
var p = btmPt1.Prev;
|
|
while ((ClipperLib.IntPoint.op_Equality(p.Pt, btmPt1.Pt)) && (p != btmPt1))
|
|
p = p.Prev;
|
|
var dx1p = Math.abs(this.GetDx(btmPt1.Pt, p.Pt));
|
|
p = btmPt1.Next;
|
|
while ((ClipperLib.IntPoint.op_Equality(p.Pt, btmPt1.Pt)) && (p != btmPt1))
|
|
p = p.Next;
|
|
var dx1n = Math.abs(this.GetDx(btmPt1.Pt, p.Pt));
|
|
p = btmPt2.Prev;
|
|
while ((ClipperLib.IntPoint.op_Equality(p.Pt, btmPt2.Pt)) && (p != btmPt2))
|
|
p = p.Prev;
|
|
var dx2p = Math.abs(this.GetDx(btmPt2.Pt, p.Pt));
|
|
p = btmPt2.Next;
|
|
while ((ClipperLib.IntPoint.op_Equality(p.Pt, btmPt2.Pt)) && (p != btmPt2))
|
|
p = p.Next;
|
|
var dx2n = Math.abs(this.GetDx(btmPt2.Pt, p.Pt));
|
|
return (dx1p >= dx2p && dx1p >= dx2n) || (dx1n >= dx2p && dx1n >= dx2n);
|
|
};
|
|
ClipperLib.Clipper.prototype.GetBottomPt = function (pp)
|
|
{
|
|
var dups = null;
|
|
var p = pp.Next;
|
|
while (p != pp)
|
|
{
|
|
if (p.Pt.Y > pp.Pt.Y)
|
|
{
|
|
pp = p;
|
|
dups = null;
|
|
}
|
|
else if (p.Pt.Y == pp.Pt.Y && p.Pt.X <= pp.Pt.X)
|
|
{
|
|
if (p.Pt.X < pp.Pt.X)
|
|
{
|
|
dups = null;
|
|
pp = p;
|
|
}
|
|
else
|
|
{
|
|
if (p.Next != pp && p.Prev != pp)
|
|
dups = p;
|
|
}
|
|
}
|
|
p = p.Next;
|
|
}
|
|
if (dups !== null)
|
|
{
|
|
//there appears to be at least 2 vertices at bottomPt so ...
|
|
while (dups != p)
|
|
{
|
|
if (!this.FirstIsBottomPt(p, dups))
|
|
pp = dups;
|
|
dups = dups.Next;
|
|
while (ClipperLib.IntPoint.op_Inequality(dups.Pt, pp.Pt))
|
|
dups = dups.Next;
|
|
}
|
|
}
|
|
return pp;
|
|
};
|
|
ClipperLib.Clipper.prototype.GetLowermostRec = function (outRec1, outRec2)
|
|
{
|
|
//work out which polygon fragment has the correct hole state ...
|
|
if (outRec1.BottomPt === null)
|
|
outRec1.BottomPt = this.GetBottomPt(outRec1.Pts);
|
|
if (outRec2.BottomPt === null)
|
|
outRec2.BottomPt = this.GetBottomPt(outRec2.Pts);
|
|
var bPt1 = outRec1.BottomPt;
|
|
var bPt2 = outRec2.BottomPt;
|
|
if (bPt1.Pt.Y > bPt2.Pt.Y)
|
|
return outRec1;
|
|
else if (bPt1.Pt.Y < bPt2.Pt.Y)
|
|
return outRec2;
|
|
else if (bPt1.Pt.X < bPt2.Pt.X)
|
|
return outRec1;
|
|
else if (bPt1.Pt.X > bPt2.Pt.X)
|
|
return outRec2;
|
|
else if (bPt1.Next == bPt1)
|
|
return outRec2;
|
|
else if (bPt2.Next == bPt2)
|
|
return outRec1;
|
|
else if (this.FirstIsBottomPt(bPt1, bPt2))
|
|
return outRec1;
|
|
else
|
|
return outRec2;
|
|
};
|
|
ClipperLib.Clipper.prototype.Param1RightOfParam2 = function (outRec1, outRec2)
|
|
{
|
|
do {
|
|
outRec1 = outRec1.FirstLeft;
|
|
if (outRec1 == outRec2)
|
|
return true;
|
|
}
|
|
while (outRec1 !== null)
|
|
return false;
|
|
};
|
|
ClipperLib.Clipper.prototype.GetOutRec = function (idx)
|
|
{
|
|
var outrec = this.m_PolyOuts[idx];
|
|
while (outrec != this.m_PolyOuts[outrec.Idx])
|
|
outrec = this.m_PolyOuts[outrec.Idx];
|
|
return outrec;
|
|
};
|
|
ClipperLib.Clipper.prototype.AppendPolygon = function (e1, e2)
|
|
{
|
|
//get the start and ends of both output polygons ...
|
|
var outRec1 = this.m_PolyOuts[e1.OutIdx];
|
|
var outRec2 = this.m_PolyOuts[e2.OutIdx];
|
|
var holeStateRec;
|
|
if (this.Param1RightOfParam2(outRec1, outRec2))
|
|
holeStateRec = outRec2;
|
|
else if (this.Param1RightOfParam2(outRec2, outRec1))
|
|
holeStateRec = outRec1;
|
|
else
|
|
holeStateRec = this.GetLowermostRec(outRec1, outRec2);
|
|
var p1_lft = outRec1.Pts;
|
|
var p1_rt = p1_lft.Prev;
|
|
var p2_lft = outRec2.Pts;
|
|
var p2_rt = p2_lft.Prev;
|
|
var side;
|
|
//join e2 poly onto e1 poly and delete pointers to e2 ...
|
|
if (e1.Side == ClipperLib.EdgeSide.esLeft)
|
|
{
|
|
if (e2.Side == ClipperLib.EdgeSide.esLeft)
|
|
{
|
|
//z y x a b c
|
|
this.ReversePolyPtLinks(p2_lft);
|
|
p2_lft.Next = p1_lft;
|
|
p1_lft.Prev = p2_lft;
|
|
p1_rt.Next = p2_rt;
|
|
p2_rt.Prev = p1_rt;
|
|
outRec1.Pts = p2_rt;
|
|
}
|
|
else
|
|
{
|
|
//x y z a b c
|
|
p2_rt.Next = p1_lft;
|
|
p1_lft.Prev = p2_rt;
|
|
p2_lft.Prev = p1_rt;
|
|
p1_rt.Next = p2_lft;
|
|
outRec1.Pts = p2_lft;
|
|
}
|
|
side = ClipperLib.EdgeSide.esLeft;
|
|
}
|
|
else
|
|
{
|
|
if (e2.Side == ClipperLib.EdgeSide.esRight)
|
|
{
|
|
//a b c z y x
|
|
this.ReversePolyPtLinks(p2_lft);
|
|
p1_rt.Next = p2_rt;
|
|
p2_rt.Prev = p1_rt;
|
|
p2_lft.Next = p1_lft;
|
|
p1_lft.Prev = p2_lft;
|
|
}
|
|
else
|
|
{
|
|
//a b c x y z
|
|
p1_rt.Next = p2_lft;
|
|
p2_lft.Prev = p1_rt;
|
|
p1_lft.Prev = p2_rt;
|
|
p2_rt.Next = p1_lft;
|
|
}
|
|
side = ClipperLib.EdgeSide.esRight;
|
|
}
|
|
outRec1.BottomPt = null;
|
|
if (holeStateRec == outRec2)
|
|
{
|
|
if (outRec2.FirstLeft != outRec1)
|
|
outRec1.FirstLeft = outRec2.FirstLeft;
|
|
outRec1.IsHole = outRec2.IsHole;
|
|
}
|
|
outRec2.Pts = null;
|
|
outRec2.BottomPt = null;
|
|
outRec2.FirstLeft = outRec1;
|
|
var OKIdx = e1.OutIdx;
|
|
var ObsoleteIdx = e2.OutIdx;
|
|
e1.OutIdx = -1;
|
|
//nb: safe because we only get here via AddLocalMaxPoly
|
|
e2.OutIdx = -1;
|
|
var e = this.m_ActiveEdges;
|
|
while (e !== null)
|
|
{
|
|
if (e.OutIdx == ObsoleteIdx)
|
|
{
|
|
e.OutIdx = OKIdx;
|
|
e.Side = side;
|
|
break;
|
|
}
|
|
e = e.NextInAEL;
|
|
}
|
|
outRec2.Idx = outRec1.Idx;
|
|
};
|
|
ClipperLib.Clipper.prototype.ReversePolyPtLinks = function (pp)
|
|
{
|
|
if (pp === null)
|
|
return;
|
|
var pp1;
|
|
var pp2;
|
|
pp1 = pp;
|
|
do {
|
|
pp2 = pp1.Next;
|
|
pp1.Next = pp1.Prev;
|
|
pp1.Prev = pp2;
|
|
pp1 = pp2;
|
|
}
|
|
while (pp1 != pp)
|
|
};
|
|
ClipperLib.Clipper.SwapSides = function (edge1, edge2)
|
|
{
|
|
var side = edge1.Side;
|
|
edge1.Side = edge2.Side;
|
|
edge2.Side = side;
|
|
};
|
|
ClipperLib.Clipper.SwapPolyIndexes = function (edge1, edge2)
|
|
{
|
|
var outIdx = edge1.OutIdx;
|
|
edge1.OutIdx = edge2.OutIdx;
|
|
edge2.OutIdx = outIdx;
|
|
};
|
|
ClipperLib.Clipper.prototype.IntersectEdges = function (e1, e2, pt, protect)
|
|
{
|
|
//e1 will be to the left of e2 BELOW the intersection. Therefore e1 is before
|
|
//e2 in AEL except when e1 is being inserted at the intersection point ...
|
|
var e1stops = !protect && e1.NextInLML === null &&
|
|
e1.Top.X == pt.X && e1.Top.Y == pt.Y;
|
|
var e2stops = !protect && e2.NextInLML === null &&
|
|
e2.Top.X == pt.X && e2.Top.Y == pt.Y;
|
|
var e1Contributing = (e1.OutIdx >= 0);
|
|
var e2Contributing = (e2.OutIdx >= 0);
|
|
if (use_lines)
|
|
{
|
|
//if either edge is on an OPEN path ...
|
|
if (e1.WindDelta === 0 || e2.WindDelta === 0)
|
|
{
|
|
//ignore subject-subject open path intersections UNLESS they
|
|
//are both open paths, AND they are both 'contributing maximas' ...
|
|
if (e1.WindDelta === 0 && e2.WindDelta === 0)
|
|
{
|
|
if ((e1stops || e2stops) && e1Contributing && e2Contributing)
|
|
this.AddLocalMaxPoly(e1, e2, pt);
|
|
}
|
|
//if intersecting a subj line with a subj poly ...
|
|
else if (e1.PolyTyp == e2.PolyTyp &&
|
|
e1.WindDelta != e2.WindDelta && this.m_ClipType == ClipperLib.ClipType.ctUnion)
|
|
{
|
|
if (e1.WindDelta === 0)
|
|
{
|
|
if (e2Contributing)
|
|
{
|
|
this.AddOutPt(e1, pt);
|
|
if (e1Contributing)
|
|
e1.OutIdx = -1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (e1Contributing)
|
|
{
|
|
this.AddOutPt(e2, pt);
|
|
if (e2Contributing)
|
|
e2.OutIdx = -1;
|
|
}
|
|
}
|
|
}
|
|
else if (e1.PolyTyp != e2.PolyTyp)
|
|
{
|
|
if ((e1.WindDelta === 0) && Math.abs(e2.WindCnt) == 1 &&
|
|
(this.m_ClipType != ClipperLib.ClipType.ctUnion || e2.WindCnt2 === 0))
|
|
{
|
|
this.AddOutPt(e1, pt);
|
|
if (e1Contributing)
|
|
e1.OutIdx = -1;
|
|
}
|
|
else if ((e2.WindDelta === 0) && (Math.abs(e1.WindCnt) == 1) &&
|
|
(this.m_ClipType != ClipperLib.ClipType.ctUnion || e1.WindCnt2 === 0))
|
|
{
|
|
this.AddOutPt(e2, pt);
|
|
if (e2Contributing)
|
|
e2.OutIdx = -1;
|
|
}
|
|
}
|
|
if (e1stops)
|
|
if (e1.OutIdx < 0)
|
|
this.DeleteFromAEL(e1);
|
|
else
|
|
ClipperLib.Error("Error intersecting polylines");
|
|
if (e2stops)
|
|
if (e2.OutIdx < 0)
|
|
this.DeleteFromAEL(e2);
|
|
else
|
|
ClipperLib.Error("Error intersecting polylines");
|
|
return;
|
|
}
|
|
}
|
|
//update winding counts...
|
|
//assumes that e1 will be to the Right of e2 ABOVE the intersection
|
|
if (e1.PolyTyp == e2.PolyTyp)
|
|
{
|
|
if (this.IsEvenOddFillType(e1))
|
|
{
|
|
var oldE1WindCnt = e1.WindCnt;
|
|
e1.WindCnt = e2.WindCnt;
|
|
e2.WindCnt = oldE1WindCnt;
|
|
}
|
|
else
|
|
{
|
|
if (e1.WindCnt + e2.WindDelta === 0)
|
|
e1.WindCnt = -e1.WindCnt;
|
|
else
|
|
e1.WindCnt += e2.WindDelta;
|
|
if (e2.WindCnt - e1.WindDelta === 0)
|
|
e2.WindCnt = -e2.WindCnt;
|
|
else
|
|
e2.WindCnt -= e1.WindDelta;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (!this.IsEvenOddFillType(e2))
|
|
e1.WindCnt2 += e2.WindDelta;
|
|
else
|
|
e1.WindCnt2 = (e1.WindCnt2 === 0) ? 1 : 0;
|
|
if (!this.IsEvenOddFillType(e1))
|
|
e2.WindCnt2 -= e1.WindDelta;
|
|
else
|
|
e2.WindCnt2 = (e2.WindCnt2 === 0) ? 1 : 0;
|
|
}
|
|
var e1FillType, e2FillType, e1FillType2, e2FillType2;
|
|
if (e1.PolyTyp == ClipperLib.PolyType.ptSubject)
|
|
{
|
|
e1FillType = this.m_SubjFillType;
|
|
e1FillType2 = this.m_ClipFillType;
|
|
}
|
|
else
|
|
{
|
|
e1FillType = this.m_ClipFillType;
|
|
e1FillType2 = this.m_SubjFillType;
|
|
}
|
|
if (e2.PolyTyp == ClipperLib.PolyType.ptSubject)
|
|
{
|
|
e2FillType = this.m_SubjFillType;
|
|
e2FillType2 = this.m_ClipFillType;
|
|
}
|
|
else
|
|
{
|
|
e2FillType = this.m_ClipFillType;
|
|
e2FillType2 = this.m_SubjFillType;
|
|
}
|
|
var e1Wc, e2Wc;
|
|
switch (e1FillType)
|
|
{
|
|
case ClipperLib.PolyFillType.pftPositive:
|
|
e1Wc = e1.WindCnt;
|
|
break;
|
|
case ClipperLib.PolyFillType.pftNegative:
|
|
e1Wc = -e1.WindCnt;
|
|
break;
|
|
default:
|
|
e1Wc = Math.abs(e1.WindCnt);
|
|
break;
|
|
}
|
|
switch (e2FillType)
|
|
{
|
|
case ClipperLib.PolyFillType.pftPositive:
|
|
e2Wc = e2.WindCnt;
|
|
break;
|
|
case ClipperLib.PolyFillType.pftNegative:
|
|
e2Wc = -e2.WindCnt;
|
|
break;
|
|
default:
|
|
e2Wc = Math.abs(e2.WindCnt);
|
|
break;
|
|
}
|
|
if (e1Contributing && e2Contributing)
|
|
{
|
|
if (e1stops || e2stops || (e1Wc !== 0 && e1Wc != 1) || (e2Wc !== 0 && e2Wc != 1) ||
|
|
(e1.PolyTyp != e2.PolyTyp && this.m_ClipType != ClipperLib.ClipType.ctXor))
|
|
this.AddLocalMaxPoly(e1, e2, pt);
|
|
else
|
|
{
|
|
this.AddOutPt(e1, pt);
|
|
this.AddOutPt(e2, pt);
|
|
ClipperLib.Clipper.SwapSides(e1, e2);
|
|
ClipperLib.Clipper.SwapPolyIndexes(e1, e2);
|
|
}
|
|
}
|
|
else if (e1Contributing)
|
|
{
|
|
if (e2Wc === 0 || e2Wc == 1)
|
|
{
|
|
this.AddOutPt(e1, pt);
|
|
ClipperLib.Clipper.SwapSides(e1, e2);
|
|
ClipperLib.Clipper.SwapPolyIndexes(e1, e2);
|
|
}
|
|
}
|
|
else if (e2Contributing)
|
|
{
|
|
if (e1Wc === 0 || e1Wc == 1)
|
|
{
|
|
this.AddOutPt(e2, pt);
|
|
ClipperLib.Clipper.SwapSides(e1, e2);
|
|
ClipperLib.Clipper.SwapPolyIndexes(e1, e2);
|
|
}
|
|
}
|
|
else if ((e1Wc === 0 || e1Wc == 1) &&
|
|
(e2Wc === 0 || e2Wc == 1) && !e1stops && !e2stops)
|
|
{
|
|
//neither edge is currently contributing ...
|
|
var e1Wc2, e2Wc2;
|
|
switch (e1FillType2)
|
|
{
|
|
case ClipperLib.PolyFillType.pftPositive:
|
|
e1Wc2 = e1.WindCnt2;
|
|
break;
|
|
case ClipperLib.PolyFillType.pftNegative:
|
|
e1Wc2 = -e1.WindCnt2;
|
|
break;
|
|
default:
|
|
e1Wc2 = Math.abs(e1.WindCnt2);
|
|
break;
|
|
}
|
|
switch (e2FillType2)
|
|
{
|
|
case ClipperLib.PolyFillType.pftPositive:
|
|
e2Wc2 = e2.WindCnt2;
|
|
break;
|
|
case ClipperLib.PolyFillType.pftNegative:
|
|
e2Wc2 = -e2.WindCnt2;
|
|
break;
|
|
default:
|
|
e2Wc2 = Math.abs(e2.WindCnt2);
|
|
break;
|
|
}
|
|
if (e1.PolyTyp != e2.PolyTyp)
|
|
this.AddLocalMinPoly(e1, e2, pt);
|
|
else if (e1Wc == 1 && e2Wc == 1)
|
|
switch (this.m_ClipType)
|
|
{
|
|
case ClipperLib.ClipType.ctIntersection:
|
|
if (e1Wc2 > 0 && e2Wc2 > 0)
|
|
this.AddLocalMinPoly(e1, e2, pt);
|
|
break;
|
|
case ClipperLib.ClipType.ctUnion:
|
|
if (e1Wc2 <= 0 && e2Wc2 <= 0)
|
|
this.AddLocalMinPoly(e1, e2, pt);
|
|
break;
|
|
case ClipperLib.ClipType.ctDifference:
|
|
if (((e1.PolyTyp == ClipperLib.PolyType.ptClip) && (e1Wc2 > 0) && (e2Wc2 > 0)) ||
|
|
((e1.PolyTyp == ClipperLib.PolyType.ptSubject) && (e1Wc2 <= 0) && (e2Wc2 <= 0)))
|
|
this.AddLocalMinPoly(e1, e2, pt);
|
|
break;
|
|
case ClipperLib.ClipType.ctXor:
|
|
this.AddLocalMinPoly(e1, e2, pt);
|
|
break;
|
|
}
|
|
else
|
|
ClipperLib.Clipper.SwapSides(e1, e2);
|
|
}
|
|
if ((e1stops != e2stops) &&
|
|
((e1stops && (e1.OutIdx >= 0)) || (e2stops && (e2.OutIdx >= 0))))
|
|
{
|
|
ClipperLib.Clipper.SwapSides(e1, e2);
|
|
ClipperLib.Clipper.SwapPolyIndexes(e1, e2);
|
|
}
|
|
//finally, delete any non-contributing maxima edges ...
|
|
if (e1stops)
|
|
this.DeleteFromAEL(e1);
|
|
if (e2stops)
|
|
this.DeleteFromAEL(e2);
|
|
};
|
|
ClipperLib.Clipper.prototype.DeleteFromAEL = function (e)
|
|
{
|
|
var AelPrev = e.PrevInAEL;
|
|
var AelNext = e.NextInAEL;
|
|
if (AelPrev === null && AelNext === null && (e != this.m_ActiveEdges))
|
|
return;
|
|
//already deleted
|
|
if (AelPrev !== null)
|
|
AelPrev.NextInAEL = AelNext;
|
|
else
|
|
this.m_ActiveEdges = AelNext;
|
|
if (AelNext !== null)
|
|
AelNext.PrevInAEL = AelPrev;
|
|
e.NextInAEL = null;
|
|
e.PrevInAEL = null;
|
|
};
|
|
ClipperLib.Clipper.prototype.DeleteFromSEL = function (e)
|
|
{
|
|
var SelPrev = e.PrevInSEL;
|
|
var SelNext = e.NextInSEL;
|
|
if (SelPrev === null && SelNext === null && (e != this.m_SortedEdges))
|
|
return;
|
|
//already deleted
|
|
if (SelPrev !== null)
|
|
SelPrev.NextInSEL = SelNext;
|
|
else
|
|
this.m_SortedEdges = SelNext;
|
|
if (SelNext !== null)
|
|
SelNext.PrevInSEL = SelPrev;
|
|
e.NextInSEL = null;
|
|
e.PrevInSEL = null;
|
|
};
|
|
ClipperLib.Clipper.prototype.UpdateEdgeIntoAEL = function (e)
|
|
{
|
|
if (e.NextInLML === null)
|
|
ClipperLib.Error("UpdateEdgeIntoAEL: invalid call");
|
|
var AelPrev = e.PrevInAEL;
|
|
var AelNext = e.NextInAEL;
|
|
e.NextInLML.OutIdx = e.OutIdx;
|
|
if (AelPrev !== null)
|
|
AelPrev.NextInAEL = e.NextInLML;
|
|
else
|
|
this.m_ActiveEdges = e.NextInLML;
|
|
if (AelNext !== null)
|
|
AelNext.PrevInAEL = e.NextInLML;
|
|
e.NextInLML.Side = e.Side;
|
|
e.NextInLML.WindDelta = e.WindDelta;
|
|
e.NextInLML.WindCnt = e.WindCnt;
|
|
e.NextInLML.WindCnt2 = e.WindCnt2;
|
|
e = e.NextInLML;
|
|
// e.Curr = e.Bot;
|
|
e.Curr.X = e.Bot.X;
|
|
e.Curr.Y = e.Bot.Y;
|
|
e.PrevInAEL = AelPrev;
|
|
e.NextInAEL = AelNext;
|
|
if (!ClipperLib.ClipperBase.IsHorizontal(e))
|
|
this.InsertScanbeam(e.Top.Y);
|
|
return e;
|
|
};
|
|
ClipperLib.Clipper.prototype.ProcessHorizontals = function (isTopOfScanbeam)
|
|
{
|
|
var horzEdge = this.m_SortedEdges;
|
|
while (horzEdge !== null)
|
|
{
|
|
this.DeleteFromSEL(horzEdge);
|
|
this.ProcessHorizontal(horzEdge, isTopOfScanbeam);
|
|
horzEdge = this.m_SortedEdges;
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.GetHorzDirection = function (HorzEdge, $var)
|
|
{
|
|
if (HorzEdge.Bot.X < HorzEdge.Top.X)
|
|
{
|
|
$var.Left = HorzEdge.Bot.X;
|
|
$var.Right = HorzEdge.Top.X;
|
|
$var.Dir = ClipperLib.Direction.dLeftToRight;
|
|
}
|
|
else
|
|
{
|
|
$var.Left = HorzEdge.Top.X;
|
|
$var.Right = HorzEdge.Bot.X;
|
|
$var.Dir = ClipperLib.Direction.dRightToLeft;
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.PrepareHorzJoins = function (horzEdge, isTopOfScanbeam)
|
|
{
|
|
//get the last Op for this horizontal edge
|
|
//the point may be anywhere along the horizontal ...
|
|
var outPt = this.m_PolyOuts[horzEdge.OutIdx].Pts;
|
|
if (horzEdge.Side != ClipperLib.EdgeSide.esLeft)
|
|
outPt = outPt.Prev;
|
|
//First, match up overlapping horizontal edges (eg when one polygon's
|
|
//intermediate horz edge overlaps an intermediate horz edge of another, or
|
|
//when one polygon sits on top of another) ...
|
|
//for (var i = 0, ilen = this.m_GhostJoins.length; i < ilen; ++i) {
|
|
// var j = this.m_GhostJoins[i];
|
|
// if (this.HorzSegmentsOverlap(j.OutPt1.Pt, j.OffPt, horzEdge.Bot, horzEdge.Top))
|
|
// this.AddJoin(j.OutPt1, outPt, j.OffPt);
|
|
//}
|
|
|
|
//Also, since horizontal edges at the top of one SB are often removed from
|
|
//the AEL before we process the horizontal edges at the bottom of the next,
|
|
//we need to create 'ghost' Join records of 'contrubuting' horizontals that
|
|
//we can compare with horizontals at the bottom of the next SB.
|
|
if (isTopOfScanbeam)
|
|
if (ClipperLib.IntPoint.op_Equality(outPt.Pt, horzEdge.Top))
|
|
this.AddGhostJoin(outPt, horzEdge.Bot);
|
|
else
|
|
this.AddGhostJoin(outPt, horzEdge.Top);
|
|
};
|
|
ClipperLib.Clipper.prototype.ProcessHorizontal = function (horzEdge, isTopOfScanbeam)
|
|
{
|
|
var $var = {Dir: null, Left: null, Right: null};
|
|
this.GetHorzDirection(horzEdge, $var);
|
|
var dir = $var.Dir;
|
|
var horzLeft = $var.Left;
|
|
var horzRight = $var.Right;
|
|
|
|
var eLastHorz = horzEdge,
|
|
eMaxPair = null;
|
|
while (eLastHorz.NextInLML !== null && ClipperLib.ClipperBase.IsHorizontal(eLastHorz.NextInLML))
|
|
eLastHorz = eLastHorz.NextInLML;
|
|
if (eLastHorz.NextInLML === null)
|
|
eMaxPair = this.GetMaximaPair(eLastHorz);
|
|
for (;;)
|
|
{
|
|
var IsLastHorz = (horzEdge == eLastHorz);
|
|
var e = this.GetNextInAEL(horzEdge, dir);
|
|
while (e !== null)
|
|
{
|
|
//Break if we've got to the end of an intermediate horizontal edge ...
|
|
//nb: Smaller Dx's are to the right of larger Dx's ABOVE the horizontal.
|
|
if (e.Curr.X == horzEdge.Top.X && horzEdge.NextInLML !== null && e.Dx < horzEdge.NextInLML.Dx)
|
|
break;
|
|
var eNext = this.GetNextInAEL(e, dir);
|
|
//saves eNext for later
|
|
if ((dir == ClipperLib.Direction.dLeftToRight && e.Curr.X <= horzRight) || (dir == ClipperLib.Direction.dRightToLeft && e.Curr.X >= horzLeft))
|
|
{
|
|
|
|
if (horzEdge.OutIdx >= 0 && horzEdge.WindDelta != 0)
|
|
this.PrepareHorzJoins(horzEdge, isTopOfScanbeam);
|
|
|
|
//so far we're still in range of the horizontal Edge but make sure
|
|
//we're at the last of consec. horizontals when matching with eMaxPair
|
|
if (e == eMaxPair && IsLastHorz)
|
|
{
|
|
if (dir == ClipperLib.Direction.dLeftToRight)
|
|
this.IntersectEdges(horzEdge, e, e.Top, false);
|
|
else
|
|
this.IntersectEdges(e, horzEdge, e.Top, false);
|
|
if (eMaxPair.OutIdx >= 0)
|
|
ClipperLib.Error("ProcessHorizontal error");
|
|
return;
|
|
}
|
|
else if (dir == ClipperLib.Direction.dLeftToRight)
|
|
{
|
|
var Pt = new ClipperLib.IntPoint(e.Curr.X, horzEdge.Curr.Y);
|
|
this.IntersectEdges(horzEdge, e, Pt, true);
|
|
}
|
|
else
|
|
{
|
|
var Pt = new ClipperLib.IntPoint(e.Curr.X, horzEdge.Curr.Y);
|
|
this.IntersectEdges(e, horzEdge, Pt, true);
|
|
}
|
|
this.SwapPositionsInAEL(horzEdge, e);
|
|
}
|
|
else if ((dir == ClipperLib.Direction.dLeftToRight && e.Curr.X >= horzRight) || (dir == ClipperLib.Direction.dRightToLeft && e.Curr.X <= horzLeft))
|
|
break;
|
|
e = eNext;
|
|
}
|
|
//end while
|
|
if (horzEdge.OutIdx >= 0 && horzEdge.WindDelta !== 0)
|
|
this.PrepareHorzJoins(horzEdge, isTopOfScanbeam);
|
|
if (horzEdge.NextInLML !== null && ClipperLib.ClipperBase.IsHorizontal(horzEdge.NextInLML))
|
|
{
|
|
horzEdge = this.UpdateEdgeIntoAEL(horzEdge);
|
|
if (horzEdge.OutIdx >= 0)
|
|
this.AddOutPt(horzEdge, horzEdge.Bot);
|
|
|
|
var $var = {Dir: dir, Left: horzLeft, Right: horzRight};
|
|
this.GetHorzDirection(horzEdge, $var);
|
|
dir = $var.Dir;
|
|
horzLeft = $var.Left;
|
|
horzRight = $var.Right;
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
//end for (;;)
|
|
if (horzEdge.NextInLML !== null)
|
|
{
|
|
if (horzEdge.OutIdx >= 0)
|
|
{
|
|
var op1 = this.AddOutPt(horzEdge, horzEdge.Top);
|
|
horzEdge = this.UpdateEdgeIntoAEL(horzEdge);
|
|
if (horzEdge.WindDelta === 0)
|
|
return;
|
|
//nb: HorzEdge is no longer horizontal here
|
|
var ePrev = horzEdge.PrevInAEL;
|
|
var eNext = horzEdge.NextInAEL;
|
|
if (ePrev !== null && ePrev.Curr.X == horzEdge.Bot.X &&
|
|
ePrev.Curr.Y == horzEdge.Bot.Y && ePrev.WindDelta !== 0 &&
|
|
(ePrev.OutIdx >= 0 && ePrev.Curr.Y > ePrev.Top.Y &&
|
|
ClipperLib.ClipperBase.SlopesEqual(horzEdge, ePrev, this.m_UseFullRange)))
|
|
{
|
|
var op2 = this.AddOutPt(ePrev, horzEdge.Bot);
|
|
this.AddJoin(op1, op2, horzEdge.Top);
|
|
}
|
|
else if (eNext !== null && eNext.Curr.X == horzEdge.Bot.X &&
|
|
eNext.Curr.Y == horzEdge.Bot.Y && eNext.WindDelta !== 0 &&
|
|
eNext.OutIdx >= 0 && eNext.Curr.Y > eNext.Top.Y &&
|
|
ClipperLib.ClipperBase.SlopesEqual(horzEdge, eNext, this.m_UseFullRange))
|
|
{
|
|
var op2 = this.AddOutPt(eNext, horzEdge.Bot);
|
|
this.AddJoin(op1, op2, horzEdge.Top);
|
|
}
|
|
}
|
|
else horzEdge = this.UpdateEdgeIntoAEL(horzEdge);
|
|
}
|
|
else if (eMaxPair !== null)
|
|
{
|
|
if (eMaxPair.OutIdx >= 0)
|
|
{
|
|
if (dir == ClipperLib.Direction.dLeftToRight)
|
|
this.IntersectEdges(horzEdge, eMaxPair, horzEdge.Top, false);
|
|
else
|
|
this.IntersectEdges(eMaxPair, horzEdge, horzEdge.Top, false);
|
|
if (eMaxPair.OutIdx >= 0)
|
|
ClipperLib.Error("ProcessHorizontal error");
|
|
}
|
|
else
|
|
{
|
|
this.DeleteFromAEL(horzEdge);
|
|
this.DeleteFromAEL(eMaxPair);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (horzEdge.OutIdx >= 0)
|
|
this.AddOutPt(horzEdge, horzEdge.Top);
|
|
this.DeleteFromAEL(horzEdge);
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.GetNextInAEL = function (e, Direction)
|
|
{
|
|
return Direction == ClipperLib.Direction.dLeftToRight ? e.NextInAEL : e.PrevInAEL;
|
|
};
|
|
ClipperLib.Clipper.prototype.IsMinima = function (e)
|
|
{
|
|
return e !== null && (e.Prev.NextInLML != e) && (e.Next.NextInLML != e);
|
|
};
|
|
ClipperLib.Clipper.prototype.IsMaxima = function (e, Y)
|
|
{
|
|
return (e !== null && e.Top.Y == Y && e.NextInLML === null);
|
|
};
|
|
ClipperLib.Clipper.prototype.IsIntermediate = function (e, Y)
|
|
{
|
|
return (e.Top.Y == Y && e.NextInLML !== null);
|
|
};
|
|
ClipperLib.Clipper.prototype.GetMaximaPair = function (e)
|
|
{
|
|
var result = null;
|
|
if ((ClipperLib.IntPoint.op_Equality(e.Next.Top, e.Top)) && e.Next.NextInLML === null)
|
|
result = e.Next;
|
|
else if ((ClipperLib.IntPoint.op_Equality(e.Prev.Top, e.Top)) && e.Prev.NextInLML === null)
|
|
result = e.Prev;
|
|
if (result !== null && (result.OutIdx == -2 || (result.NextInAEL == result.PrevInAEL && !ClipperLib.ClipperBase.IsHorizontal(result))))
|
|
return null;
|
|
return result;
|
|
};
|
|
ClipperLib.Clipper.prototype.ProcessIntersections = function (botY, topY)
|
|
{
|
|
if (this.m_ActiveEdges == null)
|
|
return true;
|
|
try
|
|
{
|
|
this.BuildIntersectList(botY, topY);
|
|
if (this.m_IntersectList.length == 0)
|
|
return true;
|
|
if (this.m_IntersectList.length == 1 || this.FixupIntersectionOrder())
|
|
this.ProcessIntersectList();
|
|
else
|
|
return false;
|
|
}
|
|
catch ($$e2)
|
|
{
|
|
this.m_SortedEdges = null;
|
|
this.m_IntersectList.length = 0;
|
|
ClipperLib.Error("ProcessIntersections error");
|
|
}
|
|
this.m_SortedEdges = null;
|
|
return true;
|
|
};
|
|
ClipperLib.Clipper.prototype.BuildIntersectList = function (botY, topY)
|
|
{
|
|
if (this.m_ActiveEdges === null)
|
|
return;
|
|
//prepare for sorting ...
|
|
var e = this.m_ActiveEdges;
|
|
//console.warn(JSON.stringify(JSON.decycle( e )));
|
|
this.m_SortedEdges = e;
|
|
while (e !== null)
|
|
{
|
|
e.PrevInSEL = e.PrevInAEL;
|
|
e.NextInSEL = e.NextInAEL;
|
|
e.Curr.X = ClipperLib.Clipper.TopX(e, topY);
|
|
e = e.NextInAEL;
|
|
}
|
|
//bubblesort ...
|
|
var isModified = true;
|
|
while (isModified && this.m_SortedEdges !== null)
|
|
{
|
|
isModified = false;
|
|
e = this.m_SortedEdges;
|
|
while (e.NextInSEL !== null)
|
|
{
|
|
var eNext = e.NextInSEL;
|
|
var pt = new ClipperLib.IntPoint();
|
|
//console.warn("e.Curr.X: " + e.Curr.X + " eNext.Curr.X" + eNext.Curr.X);
|
|
if (e.Curr.X > eNext.Curr.X)
|
|
{
|
|
if (!this.IntersectPoint(e, eNext, pt) && e.Curr.X > eNext.Curr.X + 1)
|
|
{
|
|
//console.warn("e.Curr.X: "+JSON.stringify(JSON.decycle( e.Curr.X )));
|
|
//console.warn("eNext.Curr.X+1: "+JSON.stringify(JSON.decycle( eNext.Curr.X+1)));
|
|
ClipperLib.Error("Intersection error");
|
|
}
|
|
if (pt.Y > botY)
|
|
{
|
|
pt.Y = botY;
|
|
if (Math.abs(e.Dx) > Math.abs(eNext.Dx))
|
|
pt.X = ClipperLib.Clipper.TopX(eNext, botY);
|
|
else
|
|
pt.X = ClipperLib.Clipper.TopX(e, botY);
|
|
}
|
|
var newNode = new ClipperLib.IntersectNode();
|
|
newNode.Edge1 = e;
|
|
newNode.Edge2 = eNext;
|
|
//newNode.Pt = pt;
|
|
newNode.Pt.X = pt.X;
|
|
newNode.Pt.Y = pt.Y;
|
|
this.m_IntersectList.push(newNode);
|
|
this.SwapPositionsInSEL(e, eNext);
|
|
isModified = true;
|
|
}
|
|
else
|
|
e = eNext;
|
|
}
|
|
if (e.PrevInSEL !== null)
|
|
e.PrevInSEL.NextInSEL = null;
|
|
else
|
|
break;
|
|
}
|
|
this.m_SortedEdges = null;
|
|
};
|
|
ClipperLib.Clipper.prototype.EdgesAdjacent = function (inode)
|
|
{
|
|
return (inode.Edge1.NextInSEL == inode.Edge2) || (inode.Edge1.PrevInSEL == inode.Edge2);
|
|
};
|
|
ClipperLib.Clipper.IntersectNodeSort = function (node1, node2)
|
|
{
|
|
//the following typecast is safe because the differences in Pt.Y will
|
|
//be limited to the height of the scanbeam.
|
|
return (node2.Pt.Y - node1.Pt.Y);
|
|
};
|
|
ClipperLib.Clipper.prototype.FixupIntersectionOrder = function ()
|
|
{
|
|
//pre-condition: intersections are sorted bottom-most first.
|
|
//Now it's crucial that intersections are made only between adjacent edges,
|
|
//so to ensure this the order of intersections may need adjusting ...
|
|
this.m_IntersectList.sort(this.m_IntersectNodeComparer);
|
|
this.CopyAELToSEL();
|
|
var cnt = this.m_IntersectList.length;
|
|
for (var i = 0; i < cnt; i++)
|
|
{
|
|
if (!this.EdgesAdjacent(this.m_IntersectList[i]))
|
|
{
|
|
var j = i + 1;
|
|
while (j < cnt && !this.EdgesAdjacent(this.m_IntersectList[j]))
|
|
j++;
|
|
if (j == cnt)
|
|
return false;
|
|
var tmp = this.m_IntersectList[i];
|
|
this.m_IntersectList[i] = this.m_IntersectList[j];
|
|
this.m_IntersectList[j] = tmp;
|
|
}
|
|
this.SwapPositionsInSEL(this.m_IntersectList[i].Edge1, this.m_IntersectList[i].Edge2);
|
|
}
|
|
return true;
|
|
};
|
|
ClipperLib.Clipper.prototype.ProcessIntersectList = function ()
|
|
{
|
|
for (var i = 0, ilen = this.m_IntersectList.length; i < ilen; i++)
|
|
{
|
|
var iNode = this.m_IntersectList[i];
|
|
this.IntersectEdges(iNode.Edge1, iNode.Edge2, iNode.Pt, true);
|
|
this.SwapPositionsInAEL(iNode.Edge1, iNode.Edge2);
|
|
}
|
|
this.m_IntersectList.length = 0;
|
|
};
|
|
/*
|
|
--------------------------------
|
|
Round speedtest: http://jsperf.com/fastest-round
|
|
--------------------------------
|
|
*/
|
|
var R1 = function (a)
|
|
{
|
|
return a < 0 ? Math.ceil(a - 0.5) : Math.round(a)
|
|
};
|
|
var R2 = function (a)
|
|
{
|
|
return a < 0 ? Math.ceil(a - 0.5) : Math.floor(a + 0.5)
|
|
};
|
|
var R3 = function (a)
|
|
{
|
|
return a < 0 ? -Math.round(Math.abs(a)) : Math.round(a)
|
|
};
|
|
var R4 = function (a)
|
|
{
|
|
if (a < 0)
|
|
{
|
|
a -= 0.5;
|
|
return a < -2147483648 ? Math.ceil(a) : a | 0;
|
|
}
|
|
else
|
|
{
|
|
a += 0.5;
|
|
return a > 2147483647 ? Math.floor(a) : a | 0;
|
|
}
|
|
};
|
|
if (browser.msie) ClipperLib.Clipper.Round = R1;
|
|
else if (browser.chromium) ClipperLib.Clipper.Round = R3;
|
|
else if (browser.safari) ClipperLib.Clipper.Round = R4;
|
|
else ClipperLib.Clipper.Round = R2; // eg. browser.chrome || browser.firefox || browser.opera
|
|
ClipperLib.Clipper.TopX = function (edge, currentY)
|
|
{
|
|
//if (edge.Bot == edge.Curr) console.warn ("edge.Bot = edge.Curr");
|
|
//if (edge.Bot == edge.Top) console.warn ("edge.Bot = edge.Top");
|
|
if (currentY == edge.Top.Y)
|
|
return edge.Top.X;
|
|
return edge.Bot.X + ClipperLib.Clipper.Round(edge.Dx * (currentY - edge.Bot.Y));
|
|
};
|
|
ClipperLib.Clipper.prototype.IntersectPoint = function (edge1, edge2, ip)
|
|
{
|
|
ip.X = 0;
|
|
ip.Y = 0;
|
|
var b1, b2;
|
|
//nb: with very large coordinate values, it's possible for SlopesEqual() to
|
|
//return false but for the edge.Dx value be equal due to double precision rounding.
|
|
if (ClipperLib.ClipperBase.SlopesEqual(edge1, edge2, this.m_UseFullRange) || edge1.Dx == edge2.Dx)
|
|
{
|
|
if (edge2.Bot.Y > edge1.Bot.Y)
|
|
{
|
|
ip.X = edge2.Bot.X;
|
|
ip.Y = edge2.Bot.Y;
|
|
}
|
|
else
|
|
{
|
|
ip.X = edge1.Bot.X;
|
|
ip.Y = edge1.Bot.Y;
|
|
}
|
|
return false;
|
|
}
|
|
else if (edge1.Delta.X === 0)
|
|
{
|
|
ip.X = edge1.Bot.X;
|
|
if (ClipperLib.ClipperBase.IsHorizontal(edge2))
|
|
{
|
|
ip.Y = edge2.Bot.Y;
|
|
}
|
|
else
|
|
{
|
|
b2 = edge2.Bot.Y - (edge2.Bot.X / edge2.Dx);
|
|
ip.Y = ClipperLib.Clipper.Round(ip.X / edge2.Dx + b2);
|
|
}
|
|
}
|
|
else if (edge2.Delta.X === 0)
|
|
{
|
|
ip.X = edge2.Bot.X;
|
|
if (ClipperLib.ClipperBase.IsHorizontal(edge1))
|
|
{
|
|
ip.Y = edge1.Bot.Y;
|
|
}
|
|
else
|
|
{
|
|
b1 = edge1.Bot.Y - (edge1.Bot.X / edge1.Dx);
|
|
ip.Y = ClipperLib.Clipper.Round(ip.X / edge1.Dx + b1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
b1 = edge1.Bot.X - edge1.Bot.Y * edge1.Dx;
|
|
b2 = edge2.Bot.X - edge2.Bot.Y * edge2.Dx;
|
|
var q = (b2 - b1) / (edge1.Dx - edge2.Dx);
|
|
ip.Y = ClipperLib.Clipper.Round(q);
|
|
if (Math.abs(edge1.Dx) < Math.abs(edge2.Dx))
|
|
ip.X = ClipperLib.Clipper.Round(edge1.Dx * q + b1);
|
|
else
|
|
ip.X = ClipperLib.Clipper.Round(edge2.Dx * q + b2);
|
|
}
|
|
if (ip.Y < edge1.Top.Y || ip.Y < edge2.Top.Y)
|
|
{
|
|
if (edge1.Top.Y > edge2.Top.Y)
|
|
{
|
|
ip.Y = edge1.Top.Y;
|
|
ip.X = ClipperLib.Clipper.TopX(edge2, edge1.Top.Y);
|
|
return ip.X < edge1.Top.X;
|
|
}
|
|
else
|
|
ip.Y = edge2.Top.Y;
|
|
if (Math.abs(edge1.Dx) < Math.abs(edge2.Dx))
|
|
ip.X = ClipperLib.Clipper.TopX(edge1, ip.Y);
|
|
else
|
|
ip.X = ClipperLib.Clipper.TopX(edge2, ip.Y);
|
|
}
|
|
return true;
|
|
};
|
|
ClipperLib.Clipper.prototype.ProcessEdgesAtTopOfScanbeam = function (topY)
|
|
{
|
|
var e = this.m_ActiveEdges;
|
|
while (e !== null)
|
|
{
|
|
//1. process maxima, treating them as if they're 'bent' horizontal edges,
|
|
// but exclude maxima with horizontal edges. nb: e can't be a horizontal.
|
|
var IsMaximaEdge = this.IsMaxima(e, topY);
|
|
if (IsMaximaEdge)
|
|
{
|
|
var eMaxPair = this.GetMaximaPair(e);
|
|
IsMaximaEdge = (eMaxPair === null || !ClipperLib.ClipperBase.IsHorizontal(eMaxPair));
|
|
}
|
|
if (IsMaximaEdge)
|
|
{
|
|
var ePrev = e.PrevInAEL;
|
|
this.DoMaxima(e);
|
|
if (ePrev === null)
|
|
e = this.m_ActiveEdges;
|
|
else
|
|
e = ePrev.NextInAEL;
|
|
}
|
|
else
|
|
{
|
|
//2. promote horizontal edges, otherwise update Curr.X and Curr.Y ...
|
|
if (this.IsIntermediate(e, topY) && ClipperLib.ClipperBase.IsHorizontal(e.NextInLML))
|
|
{
|
|
e = this.UpdateEdgeIntoAEL(e);
|
|
if (e.OutIdx >= 0)
|
|
this.AddOutPt(e, e.Bot);
|
|
this.AddEdgeToSEL(e);
|
|
}
|
|
else
|
|
{
|
|
e.Curr.X = ClipperLib.Clipper.TopX(e, topY);
|
|
e.Curr.Y = topY;
|
|
}
|
|
if (this.StrictlySimple)
|
|
{
|
|
var ePrev = e.PrevInAEL;
|
|
if ((e.OutIdx >= 0) && (e.WindDelta !== 0) && ePrev !== null &&
|
|
(ePrev.OutIdx >= 0) && (ePrev.Curr.X == e.Curr.X) &&
|
|
(ePrev.WindDelta !== 0))
|
|
{
|
|
var op = this.AddOutPt(ePrev, e.Curr);
|
|
var op2 = this.AddOutPt(e, e.Curr);
|
|
this.AddJoin(op, op2, e.Curr);
|
|
//StrictlySimple (type-3) join
|
|
}
|
|
}
|
|
e = e.NextInAEL;
|
|
}
|
|
}
|
|
//3. Process horizontals at the Top of the scanbeam ...
|
|
this.ProcessHorizontals(true);
|
|
//4. Promote intermediate vertices ...
|
|
e = this.m_ActiveEdges;
|
|
while (e !== null)
|
|
{
|
|
if (this.IsIntermediate(e, topY))
|
|
{
|
|
var op = null;
|
|
if (e.OutIdx >= 0)
|
|
op = this.AddOutPt(e, e.Top);
|
|
e = this.UpdateEdgeIntoAEL(e);
|
|
//if output polygons share an edge, they'll need joining later ...
|
|
var ePrev = e.PrevInAEL;
|
|
var eNext = e.NextInAEL;
|
|
if (ePrev !== null && ePrev.Curr.X == e.Bot.X &&
|
|
ePrev.Curr.Y == e.Bot.Y && op !== null &&
|
|
ePrev.OutIdx >= 0 && ePrev.Curr.Y > ePrev.Top.Y &&
|
|
ClipperLib.ClipperBase.SlopesEqual(e, ePrev, this.m_UseFullRange) &&
|
|
(e.WindDelta !== 0) && (ePrev.WindDelta !== 0))
|
|
{
|
|
var op2 = this.AddOutPt(ePrev, e.Bot);
|
|
this.AddJoin(op, op2, e.Top);
|
|
}
|
|
else if (eNext !== null && eNext.Curr.X == e.Bot.X &&
|
|
eNext.Curr.Y == e.Bot.Y && op !== null &&
|
|
eNext.OutIdx >= 0 && eNext.Curr.Y > eNext.Top.Y &&
|
|
ClipperLib.ClipperBase.SlopesEqual(e, eNext, this.m_UseFullRange) &&
|
|
(e.WindDelta !== 0) && (eNext.WindDelta !== 0))
|
|
{
|
|
var op2 = this.AddOutPt(eNext, e.Bot);
|
|
this.AddJoin(op, op2, e.Top);
|
|
}
|
|
}
|
|
e = e.NextInAEL;
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.DoMaxima = function (e)
|
|
{
|
|
var eMaxPair = this.GetMaximaPair(e);
|
|
if (eMaxPair === null)
|
|
{
|
|
if (e.OutIdx >= 0)
|
|
this.AddOutPt(e, e.Top);
|
|
this.DeleteFromAEL(e);
|
|
return;
|
|
}
|
|
var eNext = e.NextInAEL;
|
|
var use_lines = true;
|
|
while (eNext !== null && eNext != eMaxPair)
|
|
{
|
|
this.IntersectEdges(e, eNext, e.Top, true);
|
|
this.SwapPositionsInAEL(e, eNext);
|
|
eNext = e.NextInAEL;
|
|
}
|
|
if (e.OutIdx == -1 && eMaxPair.OutIdx == -1)
|
|
{
|
|
this.DeleteFromAEL(e);
|
|
this.DeleteFromAEL(eMaxPair);
|
|
}
|
|
else if (e.OutIdx >= 0 && eMaxPair.OutIdx >= 0)
|
|
{
|
|
this.IntersectEdges(e, eMaxPair, e.Top, false);
|
|
}
|
|
else if (use_lines && e.WindDelta === 0)
|
|
{
|
|
if (e.OutIdx >= 0)
|
|
{
|
|
this.AddOutPt(e, e.Top);
|
|
e.OutIdx = -1;
|
|
}
|
|
this.DeleteFromAEL(e);
|
|
if (eMaxPair.OutIdx >= 0)
|
|
{
|
|
this.AddOutPt(eMaxPair, e.Top);
|
|
eMaxPair.OutIdx = -1;
|
|
}
|
|
this.DeleteFromAEL(eMaxPair);
|
|
}
|
|
else
|
|
ClipperLib.Error("DoMaxima error");
|
|
};
|
|
ClipperLib.Clipper.ReversePaths = function (polys)
|
|
{
|
|
for (var i = 0, len = polys.length; i < len; i++)
|
|
polys[i].reverse();
|
|
};
|
|
ClipperLib.Clipper.Orientation = function (poly)
|
|
{
|
|
return ClipperLib.Clipper.Area(poly) >= 0;
|
|
};
|
|
ClipperLib.Clipper.prototype.PointCount = function (pts)
|
|
{
|
|
if (pts === null)
|
|
return 0;
|
|
var result = 0;
|
|
var p = pts;
|
|
do {
|
|
result++;
|
|
p = p.Next;
|
|
}
|
|
while (p != pts)
|
|
return result;
|
|
};
|
|
ClipperLib.Clipper.prototype.BuildResult = function (polyg)
|
|
{
|
|
ClipperLib.Clear(polyg);
|
|
for (var i = 0, ilen = this.m_PolyOuts.length; i < ilen; i++)
|
|
{
|
|
var outRec = this.m_PolyOuts[i];
|
|
if (outRec.Pts === null)
|
|
continue;
|
|
var p = outRec.Pts.Prev;
|
|
var cnt = this.PointCount(p);
|
|
if (cnt < 2)
|
|
continue;
|
|
var pg = new Array(cnt);
|
|
for (var j = 0; j < cnt; j++)
|
|
{
|
|
pg[j] = p.Pt;
|
|
p = p.Prev;
|
|
}
|
|
polyg.push(pg);
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.BuildResult2 = function (polytree)
|
|
{
|
|
polytree.Clear();
|
|
//add each output polygon/contour to polytree ...
|
|
//polytree.m_AllPolys.set_Capacity(this.m_PolyOuts.length);
|
|
for (var i = 0, ilen = this.m_PolyOuts.length; i < ilen; i++)
|
|
{
|
|
var outRec = this.m_PolyOuts[i];
|
|
var cnt = this.PointCount(outRec.Pts);
|
|
if ((outRec.IsOpen && cnt < 2) || (!outRec.IsOpen && cnt < 3))
|
|
continue;
|
|
this.FixHoleLinkage(outRec);
|
|
var pn = new ClipperLib.PolyNode();
|
|
polytree.m_AllPolys.push(pn);
|
|
outRec.PolyNode = pn;
|
|
pn.m_polygon.length = cnt;
|
|
var op = outRec.Pts.Prev;
|
|
for (var j = 0; j < cnt; j++)
|
|
{
|
|
pn.m_polygon[j] = op.Pt;
|
|
op = op.Prev;
|
|
}
|
|
}
|
|
//fixup PolyNode links etc ...
|
|
//polytree.m_Childs.set_Capacity(this.m_PolyOuts.length);
|
|
for (var i = 0, ilen = this.m_PolyOuts.length; i < ilen; i++)
|
|
{
|
|
var outRec = this.m_PolyOuts[i];
|
|
if (outRec.PolyNode === null)
|
|
continue;
|
|
else if (outRec.IsOpen)
|
|
{
|
|
outRec.PolyNode.IsOpen = true;
|
|
polytree.AddChild(outRec.PolyNode);
|
|
}
|
|
else if (outRec.FirstLeft !== null && outRec.FirstLeft.PolyNode != null)
|
|
outRec.FirstLeft.PolyNode.AddChild(outRec.PolyNode);
|
|
else
|
|
polytree.AddChild(outRec.PolyNode);
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.FixupOutPolygon = function (outRec)
|
|
{
|
|
//FixupOutPolygon() - removes duplicate points and simplifies consecutive
|
|
//parallel edges by removing the middle vertex.
|
|
var lastOK = null;
|
|
outRec.BottomPt = null;
|
|
var pp = outRec.Pts;
|
|
for (;;)
|
|
{
|
|
if (pp.Prev == pp || pp.Prev == pp.Next)
|
|
{
|
|
this.DisposeOutPts(pp);
|
|
outRec.Pts = null;
|
|
return;
|
|
}
|
|
//test for duplicate points and collinear edges ...
|
|
if ((ClipperLib.IntPoint.op_Equality(pp.Pt, pp.Next.Pt)) || (ClipperLib.IntPoint.op_Equality(pp.Pt, pp.Prev.Pt)) ||
|
|
(ClipperLib.ClipperBase.SlopesEqual(pp.Prev.Pt, pp.Pt, pp.Next.Pt, this.m_UseFullRange) &&
|
|
(!this.PreserveCollinear || !this.Pt2IsBetweenPt1AndPt3(pp.Prev.Pt, pp.Pt, pp.Next.Pt))))
|
|
{
|
|
lastOK = null;
|
|
var tmp = pp;
|
|
pp.Prev.Next = pp.Next;
|
|
pp.Next.Prev = pp.Prev;
|
|
pp = pp.Prev;
|
|
tmp = null;
|
|
}
|
|
else if (pp == lastOK)
|
|
break;
|
|
else
|
|
{
|
|
if (lastOK === null)
|
|
lastOK = pp;
|
|
pp = pp.Next;
|
|
}
|
|
}
|
|
outRec.Pts = pp;
|
|
};
|
|
ClipperLib.Clipper.prototype.DupOutPt = function (outPt, InsertAfter)
|
|
{
|
|
var result = new ClipperLib.OutPt();
|
|
//result.Pt = outPt.Pt;
|
|
result.Pt.X = outPt.Pt.X;
|
|
result.Pt.Y = outPt.Pt.Y;
|
|
result.Idx = outPt.Idx;
|
|
if (InsertAfter)
|
|
{
|
|
result.Next = outPt.Next;
|
|
result.Prev = outPt;
|
|
outPt.Next.Prev = result;
|
|
outPt.Next = result;
|
|
}
|
|
else
|
|
{
|
|
result.Prev = outPt.Prev;
|
|
result.Next = outPt;
|
|
outPt.Prev.Next = result;
|
|
outPt.Prev = result;
|
|
}
|
|
return result;
|
|
};
|
|
ClipperLib.Clipper.prototype.GetOverlap = function (a1, a2, b1, b2, $val)
|
|
{
|
|
if (a1 < a2)
|
|
{
|
|
if (b1 < b2)
|
|
{
|
|
$val.Left = Math.max(a1, b1);
|
|
$val.Right = Math.min(a2, b2);
|
|
}
|
|
else
|
|
{
|
|
$val.Left = Math.max(a1, b2);
|
|
$val.Right = Math.min(a2, b1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (b1 < b2)
|
|
{
|
|
$val.Left = Math.max(a2, b1);
|
|
$val.Right = Math.min(a1, b2);
|
|
}
|
|
else
|
|
{
|
|
$val.Left = Math.max(a2, b2);
|
|
$val.Right = Math.min(a1, b1);
|
|
}
|
|
}
|
|
return $val.Left < $val.Right;
|
|
};
|
|
ClipperLib.Clipper.prototype.JoinHorz = function (op1, op1b, op2, op2b, Pt, DiscardLeft)
|
|
{
|
|
var Dir1 = (op1.Pt.X > op1b.Pt.X ? ClipperLib.Direction.dRightToLeft : ClipperLib.Direction.dLeftToRight);
|
|
var Dir2 = (op2.Pt.X > op2b.Pt.X ? ClipperLib.Direction.dRightToLeft : ClipperLib.Direction.dLeftToRight);
|
|
if (Dir1 == Dir2)
|
|
return false;
|
|
//When DiscardLeft, we want Op1b to be on the Left of Op1, otherwise we
|
|
//want Op1b to be on the Right. (And likewise with Op2 and Op2b.)
|
|
//So, to facilitate this while inserting Op1b and Op2b ...
|
|
//when DiscardLeft, make sure we're AT or RIGHT of Pt before adding Op1b,
|
|
//otherwise make sure we're AT or LEFT of Pt. (Likewise with Op2b.)
|
|
if (Dir1 == ClipperLib.Direction.dLeftToRight)
|
|
{
|
|
while (op1.Next.Pt.X <= Pt.X &&
|
|
op1.Next.Pt.X >= op1.Pt.X && op1.Next.Pt.Y == Pt.Y)
|
|
op1 = op1.Next;
|
|
if (DiscardLeft && (op1.Pt.X != Pt.X))
|
|
op1 = op1.Next;
|
|
op1b = this.DupOutPt(op1, !DiscardLeft);
|
|
if (ClipperLib.IntPoint.op_Inequality(op1b.Pt, Pt))
|
|
{
|
|
op1 = op1b;
|
|
//op1.Pt = Pt;
|
|
op1.Pt.X = Pt.X;
|
|
op1.Pt.Y = Pt.Y;
|
|
op1b = this.DupOutPt(op1, !DiscardLeft);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
while (op1.Next.Pt.X >= Pt.X &&
|
|
op1.Next.Pt.X <= op1.Pt.X && op1.Next.Pt.Y == Pt.Y)
|
|
op1 = op1.Next;
|
|
if (!DiscardLeft && (op1.Pt.X != Pt.X))
|
|
op1 = op1.Next;
|
|
op1b = this.DupOutPt(op1, DiscardLeft);
|
|
if (ClipperLib.IntPoint.op_Inequality(op1b.Pt, Pt))
|
|
{
|
|
op1 = op1b;
|
|
//op1.Pt = Pt;
|
|
op1.Pt.X = Pt.X;
|
|
op1.Pt.Y = Pt.Y;
|
|
op1b = this.DupOutPt(op1, DiscardLeft);
|
|
}
|
|
}
|
|
if (Dir2 == ClipperLib.Direction.dLeftToRight)
|
|
{
|
|
while (op2.Next.Pt.X <= Pt.X &&
|
|
op2.Next.Pt.X >= op2.Pt.X && op2.Next.Pt.Y == Pt.Y)
|
|
op2 = op2.Next;
|
|
if (DiscardLeft && (op2.Pt.X != Pt.X))
|
|
op2 = op2.Next;
|
|
op2b = this.DupOutPt(op2, !DiscardLeft);
|
|
if (ClipperLib.IntPoint.op_Inequality(op2b.Pt, Pt))
|
|
{
|
|
op2 = op2b;
|
|
//op2.Pt = Pt;
|
|
op2.Pt.X = Pt.X;
|
|
op2.Pt.Y = Pt.Y;
|
|
op2b = this.DupOutPt(op2, !DiscardLeft);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
while (op2.Next.Pt.X >= Pt.X &&
|
|
op2.Next.Pt.X <= op2.Pt.X && op2.Next.Pt.Y == Pt.Y)
|
|
op2 = op2.Next;
|
|
if (!DiscardLeft && (op2.Pt.X != Pt.X))
|
|
op2 = op2.Next;
|
|
op2b = this.DupOutPt(op2, DiscardLeft);
|
|
if (ClipperLib.IntPoint.op_Inequality(op2b.Pt, Pt))
|
|
{
|
|
op2 = op2b;
|
|
//op2.Pt = Pt;
|
|
op2.Pt.X = Pt.X;
|
|
op2.Pt.Y = Pt.Y;
|
|
op2b = this.DupOutPt(op2, DiscardLeft);
|
|
}
|
|
}
|
|
if ((Dir1 == ClipperLib.Direction.dLeftToRight) == DiscardLeft)
|
|
{
|
|
op1.Prev = op2;
|
|
op2.Next = op1;
|
|
op1b.Next = op2b;
|
|
op2b.Prev = op1b;
|
|
}
|
|
else
|
|
{
|
|
op1.Next = op2;
|
|
op2.Prev = op1;
|
|
op1b.Prev = op2b;
|
|
op2b.Next = op1b;
|
|
}
|
|
return true;
|
|
};
|
|
ClipperLib.Clipper.prototype.JoinPoints = function (j, outRec1, outRec2)
|
|
{
|
|
var op1 = j.OutPt1,
|
|
op1b = new ClipperLib.OutPt();
|
|
var op2 = j.OutPt2,
|
|
op2b = new ClipperLib.OutPt();
|
|
//There are 3 kinds of joins for output polygons ...
|
|
//1. Horizontal joins where Join.OutPt1 & Join.OutPt2 are a vertices anywhere
|
|
//along (horizontal) collinear edges (& Join.OffPt is on the same horizontal).
|
|
//2. Non-horizontal joins where Join.OutPt1 & Join.OutPt2 are at the same
|
|
//location at the Bottom of the overlapping segment (& Join.OffPt is above).
|
|
//3. StrictlySimple joins where edges touch but are not collinear and where
|
|
//Join.OutPt1, Join.OutPt2 & Join.OffPt all share the same point.
|
|
var isHorizontal = (j.OutPt1.Pt.Y == j.OffPt.Y);
|
|
if (isHorizontal && (ClipperLib.IntPoint.op_Equality(j.OffPt, j.OutPt1.Pt)) && (ClipperLib.IntPoint.op_Equality(j.OffPt, j.OutPt2.Pt)))
|
|
{
|
|
//Strictly Simple join ...
|
|
op1b = j.OutPt1.Next;
|
|
while (op1b != op1 && (ClipperLib.IntPoint.op_Equality(op1b.Pt, j.OffPt)))
|
|
op1b = op1b.Next;
|
|
var reverse1 = (op1b.Pt.Y > j.OffPt.Y);
|
|
op2b = j.OutPt2.Next;
|
|
while (op2b != op2 && (ClipperLib.IntPoint.op_Equality(op2b.Pt, j.OffPt)))
|
|
op2b = op2b.Next;
|
|
var reverse2 = (op2b.Pt.Y > j.OffPt.Y);
|
|
if (reverse1 == reverse2)
|
|
return false;
|
|
if (reverse1)
|
|
{
|
|
op1b = this.DupOutPt(op1, false);
|
|
op2b = this.DupOutPt(op2, true);
|
|
op1.Prev = op2;
|
|
op2.Next = op1;
|
|
op1b.Next = op2b;
|
|
op2b.Prev = op1b;
|
|
j.OutPt1 = op1;
|
|
j.OutPt2 = op1b;
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
op1b = this.DupOutPt(op1, true);
|
|
op2b = this.DupOutPt(op2, false);
|
|
op1.Next = op2;
|
|
op2.Prev = op1;
|
|
op1b.Prev = op2b;
|
|
op2b.Next = op1b;
|
|
j.OutPt1 = op1;
|
|
j.OutPt2 = op1b;
|
|
return true;
|
|
}
|
|
}
|
|
else if (isHorizontal)
|
|
{
|
|
//treat horizontal joins differently to non-horizontal joins since with
|
|
//them we're not yet sure where the overlapping is. OutPt1.Pt & OutPt2.Pt
|
|
//may be anywhere along the horizontal edge.
|
|
op1b = op1;
|
|
while (op1.Prev.Pt.Y == op1.Pt.Y && op1.Prev != op1b && op1.Prev != op2)
|
|
op1 = op1.Prev;
|
|
while (op1b.Next.Pt.Y == op1b.Pt.Y && op1b.Next != op1 && op1b.Next != op2)
|
|
op1b = op1b.Next;
|
|
if (op1b.Next == op1 || op1b.Next == op2)
|
|
return false;
|
|
//a flat 'polygon'
|
|
op2b = op2;
|
|
while (op2.Prev.Pt.Y == op2.Pt.Y && op2.Prev != op2b && op2.Prev != op1b)
|
|
op2 = op2.Prev;
|
|
while (op2b.Next.Pt.Y == op2b.Pt.Y && op2b.Next != op2 && op2b.Next != op1)
|
|
op2b = op2b.Next;
|
|
if (op2b.Next == op2 || op2b.Next == op1)
|
|
return false;
|
|
//a flat 'polygon'
|
|
//Op1 -. Op1b & Op2 -. Op2b are the extremites of the horizontal edges
|
|
|
|
var $val = {Left: null, Right: null};
|
|
if (!this.GetOverlap(op1.Pt.X, op1b.Pt.X, op2.Pt.X, op2b.Pt.X, $val))
|
|
return false;
|
|
var Left = $val.Left;
|
|
var Right = $val.Right;
|
|
|
|
//DiscardLeftSide: when overlapping edges are joined, a spike will created
|
|
//which needs to be cleaned up. However, we don't want Op1 or Op2 caught up
|
|
//on the discard Side as either may still be needed for other joins ...
|
|
var Pt = new ClipperLib.IntPoint();
|
|
var DiscardLeftSide;
|
|
if (op1.Pt.X >= Left && op1.Pt.X <= Right)
|
|
{
|
|
//Pt = op1.Pt;
|
|
Pt.X = op1.Pt.X;
|
|
Pt.Y = op1.Pt.Y;
|
|
DiscardLeftSide = (op1.Pt.X > op1b.Pt.X);
|
|
}
|
|
else if (op2.Pt.X >= Left && op2.Pt.X <= Right)
|
|
{
|
|
//Pt = op2.Pt;
|
|
Pt.X = op2.Pt.X;
|
|
Pt.Y = op2.Pt.Y;
|
|
DiscardLeftSide = (op2.Pt.X > op2b.Pt.X);
|
|
}
|
|
else if (op1b.Pt.X >= Left && op1b.Pt.X <= Right)
|
|
{
|
|
//Pt = op1b.Pt;
|
|
Pt.X = op1b.Pt.X;
|
|
Pt.Y = op1b.Pt.Y;
|
|
DiscardLeftSide = op1b.Pt.X > op1.Pt.X;
|
|
}
|
|
else
|
|
{
|
|
//Pt = op2b.Pt;
|
|
Pt.X = op2b.Pt.X;
|
|
Pt.Y = op2b.Pt.Y;
|
|
DiscardLeftSide = (op2b.Pt.X > op2.Pt.X);
|
|
}
|
|
j.OutPt1 = op1;
|
|
j.OutPt2 = op2;
|
|
return this.JoinHorz(op1, op1b, op2, op2b, Pt, DiscardLeftSide);
|
|
}
|
|
else
|
|
{
|
|
//nb: For non-horizontal joins ...
|
|
// 1. Jr.OutPt1.Pt.Y == Jr.OutPt2.Pt.Y
|
|
// 2. Jr.OutPt1.Pt > Jr.OffPt.Y
|
|
//make sure the polygons are correctly oriented ...
|
|
op1b = op1.Next;
|
|
while ((ClipperLib.IntPoint.op_Equality(op1b.Pt, op1.Pt)) && (op1b != op1))
|
|
op1b = op1b.Next;
|
|
var Reverse1 = ((op1b.Pt.Y > op1.Pt.Y) || !ClipperLib.ClipperBase.SlopesEqual(op1.Pt, op1b.Pt, j.OffPt, this.m_UseFullRange));
|
|
if (Reverse1)
|
|
{
|
|
op1b = op1.Prev;
|
|
while ((ClipperLib.IntPoint.op_Equality(op1b.Pt, op1.Pt)) && (op1b != op1))
|
|
op1b = op1b.Prev;
|
|
if ((op1b.Pt.Y > op1.Pt.Y) || !ClipperLib.ClipperBase.SlopesEqual(op1.Pt, op1b.Pt, j.OffPt, this.m_UseFullRange))
|
|
return false;
|
|
}
|
|
op2b = op2.Next;
|
|
while ((ClipperLib.IntPoint.op_Equality(op2b.Pt, op2.Pt)) && (op2b != op2))
|
|
op2b = op2b.Next;
|
|
var Reverse2 = ((op2b.Pt.Y > op2.Pt.Y) || !ClipperLib.ClipperBase.SlopesEqual(op2.Pt, op2b.Pt, j.OffPt, this.m_UseFullRange));
|
|
if (Reverse2)
|
|
{
|
|
op2b = op2.Prev;
|
|
while ((ClipperLib.IntPoint.op_Equality(op2b.Pt, op2.Pt)) && (op2b != op2))
|
|
op2b = op2b.Prev;
|
|
if ((op2b.Pt.Y > op2.Pt.Y) || !ClipperLib.ClipperBase.SlopesEqual(op2.Pt, op2b.Pt, j.OffPt, this.m_UseFullRange))
|
|
return false;
|
|
}
|
|
if ((op1b == op1) || (op2b == op2) || (op1b == op2b) ||
|
|
((outRec1 == outRec2) && (Reverse1 == Reverse2)))
|
|
return false;
|
|
if (Reverse1)
|
|
{
|
|
op1b = this.DupOutPt(op1, false);
|
|
op2b = this.DupOutPt(op2, true);
|
|
op1.Prev = op2;
|
|
op2.Next = op1;
|
|
op1b.Next = op2b;
|
|
op2b.Prev = op1b;
|
|
j.OutPt1 = op1;
|
|
j.OutPt2 = op1b;
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
op1b = this.DupOutPt(op1, true);
|
|
op2b = this.DupOutPt(op2, false);
|
|
op1.Next = op2;
|
|
op2.Prev = op1;
|
|
op1b.Prev = op2b;
|
|
op2b.Next = op1b;
|
|
j.OutPt1 = op1;
|
|
j.OutPt2 = op1b;
|
|
return true;
|
|
}
|
|
}
|
|
};
|
|
ClipperLib.Clipper.GetBounds = function (paths)
|
|
{
|
|
var i = 0,
|
|
cnt = paths.length;
|
|
while (i < cnt && paths[i].length == 0) i++;
|
|
if (i == cnt) return new ClipperLib.IntRect(0, 0, 0, 0);
|
|
var result = new ClipperLib.IntRect();
|
|
result.left = paths[i][0].X;
|
|
result.right = result.left;
|
|
result.top = paths[i][0].Y;
|
|
result.bottom = result.top;
|
|
for (; i < cnt; i++)
|
|
for (var j = 0, jlen = paths[i].length; j < jlen; j++)
|
|
{
|
|
if (paths[i][j].X < result.left) result.left = paths[i][j].X;
|
|
else if (paths[i][j].X > result.right) result.right = paths[i][j].X;
|
|
if (paths[i][j].Y < result.top) result.top = paths[i][j].Y;
|
|
else if (paths[i][j].Y > result.bottom) result.bottom = paths[i][j].Y;
|
|
}
|
|
return result;
|
|
}
|
|
ClipperLib.Clipper.prototype.GetBounds2 = function (ops)
|
|
{
|
|
var opStart = ops;
|
|
var result = new ClipperLib.IntRect();
|
|
result.left = ops.Pt.X;
|
|
result.right = ops.Pt.X;
|
|
result.top = ops.Pt.Y;
|
|
result.bottom = ops.Pt.Y;
|
|
ops = ops.Next;
|
|
while (ops != opStart)
|
|
{
|
|
if (ops.Pt.X < result.left)
|
|
result.left = ops.Pt.X;
|
|
if (ops.Pt.X > result.right)
|
|
result.right = ops.Pt.X;
|
|
if (ops.Pt.Y < result.top)
|
|
result.top = ops.Pt.Y;
|
|
if (ops.Pt.Y > result.bottom)
|
|
result.bottom = ops.Pt.Y;
|
|
ops = ops.Next;
|
|
}
|
|
return result;
|
|
};
|
|
|
|
ClipperLib.Clipper.PointInPolygon = function (pt, path)
|
|
{
|
|
//returns 0 if false, +1 if true, -1 if pt ON polygon boundary
|
|
//http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.88.5498&rep=rep1&type=pdf
|
|
var result = 0,
|
|
cnt = path.length;
|
|
if (cnt < 3)
|
|
return 0;
|
|
var ip = path[0];
|
|
for (var i = 1; i <= cnt; ++i)
|
|
{
|
|
var ipNext = (i == cnt ? path[0] : path[i]);
|
|
if (ipNext.Y == pt.Y)
|
|
{
|
|
if ((ipNext.X == pt.X) || (ip.Y == pt.Y && ((ipNext.X > pt.X) == (ip.X < pt.X))))
|
|
return -1;
|
|
}
|
|
if ((ip.Y < pt.Y) != (ipNext.Y < pt.Y))
|
|
{
|
|
if (ip.X >= pt.X)
|
|
{
|
|
if (ipNext.X > pt.X)
|
|
result = 1 - result;
|
|
else
|
|
{
|
|
var d = (ip.X - pt.X) * (ipNext.Y - pt.Y) - (ipNext.X - pt.X) * (ip.Y - pt.Y);
|
|
if (d == 0)
|
|
return -1;
|
|
else if ((d > 0) == (ipNext.Y > ip.Y))
|
|
result = 1 - result;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (ipNext.X > pt.X)
|
|
{
|
|
var d = (ip.X - pt.X) * (ipNext.Y - pt.Y) - (ipNext.X - pt.X) * (ip.Y - pt.Y);
|
|
if (d == 0)
|
|
return -1;
|
|
else if ((d > 0) == (ipNext.Y > ip.Y))
|
|
result = 1 - result;
|
|
}
|
|
}
|
|
}
|
|
ip = ipNext;
|
|
}
|
|
return result;
|
|
};
|
|
|
|
ClipperLib.Clipper.prototype.PointInPolygon = function (pt, op)
|
|
{
|
|
//returns 0 if false, +1 if true, -1 if pt ON polygon boundary
|
|
//http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.88.5498&rep=rep1&type=pdf
|
|
var result = 0;
|
|
var startOp = op;
|
|
for (;;)
|
|
{
|
|
var poly0x = op.Pt.X,
|
|
poly0y = op.Pt.Y;
|
|
var poly1x = op.Next.Pt.X,
|
|
poly1y = op.Next.Pt.Y;
|
|
if (poly1y == pt.Y)
|
|
{
|
|
if ((poly1x == pt.X) || (poly0y == pt.Y && ((poly1x > pt.X) == (poly0x < pt.X))))
|
|
return -1;
|
|
}
|
|
if ((poly0y < pt.Y) != (poly1y < pt.Y))
|
|
{
|
|
if (poly0x >= pt.X)
|
|
{
|
|
if (poly1x > pt.X)
|
|
result = 1 - result;
|
|
else
|
|
{
|
|
var d = (poly0x - pt.X) * (poly1y - pt.Y) - (poly1x - pt.X) * (poly0y - pt.Y);
|
|
if (d == 0)
|
|
return -1;
|
|
if ((d > 0) == (poly1y > poly0y))
|
|
result = 1 - result;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (poly1x > pt.X)
|
|
{
|
|
var d = (poly0x - pt.X) * (poly1y - pt.Y) - (poly1x - pt.X) * (poly0y - pt.Y);
|
|
if (d == 0)
|
|
return -1;
|
|
if ((d > 0) == (poly1y > poly0y))
|
|
result = 1 - result;
|
|
}
|
|
}
|
|
}
|
|
op = op.Next;
|
|
if (startOp == op)
|
|
break;
|
|
}
|
|
return result;
|
|
};
|
|
|
|
ClipperLib.Clipper.prototype.Poly2ContainsPoly1 = function (outPt1, outPt2)
|
|
{
|
|
var op = outPt1;
|
|
do {
|
|
var res = this.PointInPolygon(op.Pt, outPt2);
|
|
if (res >= 0)
|
|
return res != 0;
|
|
op = op.Next;
|
|
}
|
|
while (op != outPt1)
|
|
return true;
|
|
};
|
|
ClipperLib.Clipper.prototype.FixupFirstLefts1 = function (OldOutRec, NewOutRec)
|
|
{
|
|
for (var i = 0, ilen = this.m_PolyOuts.length; i < ilen; i++)
|
|
{
|
|
var outRec = this.m_PolyOuts[i];
|
|
if (outRec.Pts !== null && outRec.FirstLeft == OldOutRec)
|
|
{
|
|
if (this.Poly2ContainsPoly1(outRec.Pts, NewOutRec.Pts))
|
|
outRec.FirstLeft = NewOutRec;
|
|
}
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.FixupFirstLefts2 = function (OldOutRec, NewOutRec)
|
|
{
|
|
for (var $i2 = 0, $t2 = this.m_PolyOuts, $l2 = $t2.length, outRec = $t2[$i2]; $i2 < $l2; $i2++, outRec = $t2[$i2])
|
|
if (outRec.FirstLeft == OldOutRec)
|
|
outRec.FirstLeft = NewOutRec;
|
|
};
|
|
ClipperLib.Clipper.ParseFirstLeft = function (FirstLeft)
|
|
{
|
|
while (FirstLeft != null && FirstLeft.Pts == null)
|
|
FirstLeft = FirstLeft.FirstLeft;
|
|
return FirstLeft;
|
|
};
|
|
ClipperLib.Clipper.prototype.JoinCommonEdges = function ()
|
|
{
|
|
for (var i = 0, ilen = this.m_Joins.length; i < ilen; i++)
|
|
{
|
|
var join = this.m_Joins[i];
|
|
var outRec1 = this.GetOutRec(join.OutPt1.Idx);
|
|
var outRec2 = this.GetOutRec(join.OutPt2.Idx);
|
|
if (outRec1.Pts == null || outRec2.Pts == null)
|
|
continue;
|
|
//get the polygon fragment with the correct hole state (FirstLeft)
|
|
//before calling JoinPoints() ...
|
|
var holeStateRec;
|
|
if (outRec1 == outRec2)
|
|
holeStateRec = outRec1;
|
|
else if (this.Param1RightOfParam2(outRec1, outRec2))
|
|
holeStateRec = outRec2;
|
|
else if (this.Param1RightOfParam2(outRec2, outRec1))
|
|
holeStateRec = outRec1;
|
|
else
|
|
holeStateRec = this.GetLowermostRec(outRec1, outRec2);
|
|
|
|
if (!this.JoinPoints(join, outRec1, outRec2)) continue;
|
|
|
|
if (outRec1 == outRec2)
|
|
{
|
|
//instead of joining two polygons, we've just created a new one by
|
|
//splitting one polygon into two.
|
|
outRec1.Pts = join.OutPt1;
|
|
outRec1.BottomPt = null;
|
|
outRec2 = this.CreateOutRec();
|
|
outRec2.Pts = join.OutPt2;
|
|
//update all OutRec2.Pts Idx's ...
|
|
this.UpdateOutPtIdxs(outRec2);
|
|
//We now need to check every OutRec.FirstLeft pointer. If it points
|
|
//to OutRec1 it may need to point to OutRec2 instead ...
|
|
if (this.m_UsingPolyTree)
|
|
for (var j = 0, jlen = this.m_PolyOuts.length; j < jlen - 1; j++)
|
|
{
|
|
var oRec = this.m_PolyOuts[j];
|
|
if (oRec.Pts == null || ClipperLib.Clipper.ParseFirstLeft(oRec.FirstLeft) != outRec1 || oRec.IsHole == outRec1.IsHole)
|
|
continue;
|
|
if (this.Poly2ContainsPoly1(oRec.Pts, join.OutPt2))
|
|
oRec.FirstLeft = outRec2;
|
|
}
|
|
if (this.Poly2ContainsPoly1(outRec2.Pts, outRec1.Pts))
|
|
{
|
|
//outRec2 is contained by outRec1 ...
|
|
outRec2.IsHole = !outRec1.IsHole;
|
|
outRec2.FirstLeft = outRec1;
|
|
//fixup FirstLeft pointers that may need reassigning to OutRec1
|
|
if (this.m_UsingPolyTree)
|
|
this.FixupFirstLefts2(outRec2, outRec1);
|
|
if ((outRec2.IsHole ^ this.ReverseSolution) == (this.Area(outRec2) > 0))
|
|
this.ReversePolyPtLinks(outRec2.Pts);
|
|
}
|
|
else if (this.Poly2ContainsPoly1(outRec1.Pts, outRec2.Pts))
|
|
{
|
|
//outRec1 is contained by outRec2 ...
|
|
outRec2.IsHole = outRec1.IsHole;
|
|
outRec1.IsHole = !outRec2.IsHole;
|
|
outRec2.FirstLeft = outRec1.FirstLeft;
|
|
outRec1.FirstLeft = outRec2;
|
|
//fixup FirstLeft pointers that may need reassigning to OutRec1
|
|
if (this.m_UsingPolyTree)
|
|
this.FixupFirstLefts2(outRec1, outRec2);
|
|
if ((outRec1.IsHole ^ this.ReverseSolution) == (this.Area(outRec1) > 0))
|
|
this.ReversePolyPtLinks(outRec1.Pts);
|
|
}
|
|
else
|
|
{
|
|
//the 2 polygons are completely separate ...
|
|
outRec2.IsHole = outRec1.IsHole;
|
|
outRec2.FirstLeft = outRec1.FirstLeft;
|
|
//fixup FirstLeft pointers that may need reassigning to OutRec2
|
|
if (this.m_UsingPolyTree)
|
|
this.FixupFirstLefts1(outRec1, outRec2);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
//joined 2 polygons together ...
|
|
outRec2.Pts = null;
|
|
outRec2.BottomPt = null;
|
|
outRec2.Idx = outRec1.Idx;
|
|
outRec1.IsHole = holeStateRec.IsHole;
|
|
if (holeStateRec == outRec2)
|
|
outRec1.FirstLeft = outRec2.FirstLeft;
|
|
outRec2.FirstLeft = outRec1;
|
|
//fixup FirstLeft pointers that may need reassigning to OutRec1
|
|
if (this.m_UsingPolyTree)
|
|
this.FixupFirstLefts2(outRec2, outRec1);
|
|
}
|
|
}
|
|
};
|
|
ClipperLib.Clipper.prototype.UpdateOutPtIdxs = function (outrec)
|
|
{
|
|
var op = outrec.Pts;
|
|
do {
|
|
op.Idx = outrec.Idx;
|
|
op = op.Prev;
|
|
}
|
|
while (op != outrec.Pts)
|
|
};
|
|
ClipperLib.Clipper.prototype.DoSimplePolygons = function ()
|
|
{
|
|
var i = 0;
|
|
while (i < this.m_PolyOuts.length)
|
|
{
|
|
var outrec = this.m_PolyOuts[i++];
|
|
var op = outrec.Pts;
|
|
if (op === null)
|
|
continue;
|
|
do //for each Pt in Polygon until duplicate found do ...
|
|
{
|
|
var op2 = op.Next;
|
|
while (op2 != outrec.Pts)
|
|
{
|
|
if ((ClipperLib.IntPoint.op_Equality(op.Pt, op2.Pt)) && op2.Next != op && op2.Prev != op)
|
|
{
|
|
//split the polygon into two ...
|
|
var op3 = op.Prev;
|
|
var op4 = op2.Prev;
|
|
op.Prev = op4;
|
|
op4.Next = op;
|
|
op2.Prev = op3;
|
|
op3.Next = op2;
|
|
outrec.Pts = op;
|
|
var outrec2 = this.CreateOutRec();
|
|
outrec2.Pts = op2;
|
|
this.UpdateOutPtIdxs(outrec2);
|
|
if (this.Poly2ContainsPoly1(outrec2.Pts, outrec.Pts))
|
|
{
|
|
//OutRec2 is contained by OutRec1 ...
|
|
outrec2.IsHole = !outrec.IsHole;
|
|
outrec2.FirstLeft = outrec;
|
|
}
|
|
else if (this.Poly2ContainsPoly1(outrec.Pts, outrec2.Pts))
|
|
{
|
|
//OutRec1 is contained by OutRec2 ...
|
|
outrec2.IsHole = outrec.IsHole;
|
|
outrec.IsHole = !outrec2.IsHole;
|
|
outrec2.FirstLeft = outrec.FirstLeft;
|
|
outrec.FirstLeft = outrec2;
|
|
}
|
|
else
|
|
{
|
|
//the 2 polygons are separate ...
|
|
outrec2.IsHole = outrec.IsHole;
|
|
outrec2.FirstLeft = outrec.FirstLeft;
|
|
}
|
|
op2 = op;
|
|
//ie get ready for the next iteration
|
|
}
|
|
op2 = op2.Next;
|
|
}
|
|
op = op.Next;
|
|
}
|
|
while (op != outrec.Pts)
|
|
}
|
|
};
|
|
ClipperLib.Clipper.Area = function (poly)
|
|
{
|
|
var cnt = poly.length;
|
|
if (cnt < 3)
|
|
return 0;
|
|
var a = 0;
|
|
for (var i = 0, j = cnt - 1; i < cnt; ++i)
|
|
{
|
|
a += (poly[j].X + poly[i].X) * (poly[j].Y - poly[i].Y);
|
|
j = i;
|
|
}
|
|
return -a * 0.5;
|
|
};
|
|
ClipperLib.Clipper.prototype.Area = function (outRec)
|
|
{
|
|
var op = outRec.Pts;
|
|
if (op == null)
|
|
return 0;
|
|
var a = 0;
|
|
do {
|
|
a = a + (op.Prev.Pt.X + op.Pt.X) * (op.Prev.Pt.Y - op.Pt.Y);
|
|
op = op.Next;
|
|
}
|
|
while (op != outRec.Pts)
|
|
return a * 0.5;
|
|
};
|
|
if (use_deprecated)
|
|
{
|
|
ClipperLib.Clipper.OffsetPaths = function (polys, delta, jointype, endtype, MiterLimit)
|
|
{
|
|
var result = new ClipperLib.Paths();
|
|
var co = new ClipperLib.ClipperOffset(MiterLimit, MiterLimit);
|
|
co.AddPaths(polys, jointype, endtype);
|
|
co.Execute(result, delta);
|
|
return result;
|
|
};
|
|
}
|
|
ClipperLib.Clipper.SimplifyPolygon = function (poly, fillType)
|
|
{
|
|
var result = new Array();
|
|
var c = new ClipperLib.Clipper(0);
|
|
c.StrictlySimple = true;
|
|
c.AddPath(poly, ClipperLib.PolyType.ptSubject, true);
|
|
c.Execute(ClipperLib.ClipType.ctUnion, result, fillType, fillType);
|
|
return result;
|
|
};
|
|
ClipperLib.Clipper.SimplifyPolygons = function (polys, fillType)
|
|
{
|
|
if (typeof (fillType) == "undefined") fillType = ClipperLib.PolyFillType.pftEvenOdd;
|
|
var result = new Array();
|
|
var c = new ClipperLib.Clipper(0);
|
|
c.StrictlySimple = true;
|
|
c.AddPaths(polys, ClipperLib.PolyType.ptSubject, true);
|
|
c.Execute(ClipperLib.ClipType.ctUnion, result, fillType, fillType);
|
|
return result;
|
|
};
|
|
ClipperLib.Clipper.DistanceSqrd = function (pt1, pt2)
|
|
{
|
|
var dx = (pt1.X - pt2.X);
|
|
var dy = (pt1.Y - pt2.Y);
|
|
return (dx * dx + dy * dy);
|
|
};
|
|
ClipperLib.Clipper.DistanceFromLineSqrd = function (pt, ln1, ln2)
|
|
{
|
|
//The equation of a line in general form (Ax + By + C = 0)
|
|
//given 2 points (x¹,y¹) & (x²,y²) is ...
|
|
//(y¹ - y²)x + (x² - x¹)y + (y² - y¹)x¹ - (x² - x¹)y¹ = 0
|
|
//A = (y¹ - y²); B = (x² - x¹); C = (y² - y¹)x¹ - (x² - x¹)y¹
|
|
//perpendicular distance of point (x³,y³) = (Ax³ + By³ + C)/Sqrt(A² + B²)
|
|
//see http://en.wikipedia.org/wiki/Perpendicular_distance
|
|
var A = ln1.Y - ln2.Y;
|
|
var B = ln2.X - ln1.X;
|
|
var C = A * ln1.X + B * ln1.Y;
|
|
C = A * pt.X + B * pt.Y - C;
|
|
return (C * C) / (A * A + B * B);
|
|
};
|
|
ClipperLib.Clipper.SlopesNearCollinear = function (pt1, pt2, pt3, distSqrd)
|
|
{
|
|
return ClipperLib.Clipper.DistanceFromLineSqrd(pt2, pt1, pt3) < distSqrd;
|
|
};
|
|
ClipperLib.Clipper.PointsAreClose = function (pt1, pt2, distSqrd)
|
|
{
|
|
var dx = pt1.X - pt2.X;
|
|
var dy = pt1.Y - pt2.Y;
|
|
return ((dx * dx) + (dy * dy) <= distSqrd);
|
|
};
|
|
//------------------------------------------------------------------------------
|
|
ClipperLib.Clipper.ExcludeOp = function (op)
|
|
{
|
|
var result = op.Prev;
|
|
result.Next = op.Next;
|
|
op.Next.Prev = result;
|
|
result.Idx = 0;
|
|
return result;
|
|
};
|
|
ClipperLib.Clipper.CleanPolygon = function (path, distance)
|
|
{
|
|
if (typeof (distance) == "undefined") distance = 1.415;
|
|
//distance = proximity in units/pixels below which vertices will be stripped.
|
|
//Default ~= sqrt(2) so when adjacent vertices or semi-adjacent vertices have
|
|
//both x & y coords within 1 unit, then the second vertex will be stripped.
|
|
var cnt = path.length;
|
|
if (cnt == 0)
|
|
return new Array();
|
|
var outPts = new Array(cnt);
|
|
for (var i = 0; i < cnt; ++i)
|
|
outPts[i] = new ClipperLib.OutPt();
|
|
for (var i = 0; i < cnt; ++i)
|
|
{
|
|
outPts[i].Pt = path[i];
|
|
outPts[i].Next = outPts[(i + 1) % cnt];
|
|
outPts[i].Next.Prev = outPts[i];
|
|
outPts[i].Idx = 0;
|
|
}
|
|
var distSqrd = distance * distance;
|
|
var op = outPts[0];
|
|
while (op.Idx == 0 && op.Next != op.Prev)
|
|
{
|
|
if (ClipperLib.Clipper.PointsAreClose(op.Pt, op.Prev.Pt, distSqrd))
|
|
{
|
|
op = ClipperLib.Clipper.ExcludeOp(op);
|
|
cnt--;
|
|
}
|
|
else if (ClipperLib.Clipper.PointsAreClose(op.Prev.Pt, op.Next.Pt, distSqrd))
|
|
{
|
|
ClipperLib.Clipper.ExcludeOp(op.Next);
|
|
op = ClipperLib.Clipper.ExcludeOp(op);
|
|
cnt -= 2;
|
|
}
|
|
else if (ClipperLib.Clipper.SlopesNearCollinear(op.Prev.Pt, op.Pt, op.Next.Pt, distSqrd))
|
|
{
|
|
op = ClipperLib.Clipper.ExcludeOp(op);
|
|
cnt--;
|
|
}
|
|
else
|
|
{
|
|
op.Idx = 1;
|
|
op = op.Next;
|
|
}
|
|
}
|
|
if (cnt < 3)
|
|
cnt = 0;
|
|
var result = new Array(cnt);
|
|
for (var i = 0; i < cnt; ++i)
|
|
{
|
|
result[i] = new ClipperLib.IntPoint(op.Pt);
|
|
op = op.Next;
|
|
}
|
|
outPts = null;
|
|
return result;
|
|
};
|
|
ClipperLib.Clipper.CleanPolygons = function (polys, distance)
|
|
{
|
|
var result = new Array(polys.length);
|
|
for (var i = 0, ilen = polys.length; i < ilen; i++)
|
|
result[i] = ClipperLib.Clipper.CleanPolygon(polys[i], distance);
|
|
return result;
|
|
};
|
|
ClipperLib.Clipper.Minkowski = function (pattern, path, IsSum, IsClosed)
|
|
{
|
|
var delta = (IsClosed ? 1 : 0);
|
|
var polyCnt = pattern.length;
|
|
var pathCnt = path.length;
|
|
var result = new Array();
|
|
if (IsSum)
|
|
for (var i = 0; i < pathCnt; i++)
|
|
{
|
|
var p = new Array(polyCnt);
|
|
for (var j = 0, jlen = pattern.length, ip = pattern[j]; j < jlen; j++, ip = pattern[j])
|
|
p[j] = new ClipperLib.IntPoint(path[i].X + ip.X, path[i].Y + ip.Y);
|
|
result.push(p);
|
|
}
|
|
else
|
|
for (var i = 0; i < pathCnt; i++)
|
|
{
|
|
var p = new Array(polyCnt);
|
|
for (var j = 0, jlen = pattern.length, ip = pattern[j]; j < jlen; j++, ip = pattern[j])
|
|
p[j] = new ClipperLib.IntPoint(path[i].X - ip.X, path[i].Y - ip.Y);
|
|
result.push(p);
|
|
}
|
|
var quads = new Array();
|
|
for (var i = 0; i < pathCnt - 1 + delta; i++)
|
|
for (var j = 0; j < polyCnt; j++)
|
|
{
|
|
var quad = new Array();
|
|
quad.push(result[i % pathCnt][j % polyCnt]);
|
|
quad.push(result[(i + 1) % pathCnt][j % polyCnt]);
|
|
quad.push(result[(i + 1) % pathCnt][(j + 1) % polyCnt]);
|
|
quad.push(result[i % pathCnt][(j + 1) % polyCnt]);
|
|
if (!ClipperLib.Clipper.Orientation(quad))
|
|
quad.reverse();
|
|
quads.push(quad);
|
|
}
|
|
var c = new ClipperLib.Clipper(0);
|
|
c.AddPaths(quads, ClipperLib.PolyType.ptSubject, true);
|
|
c.Execute(ClipperLib.ClipType.ctUnion, result, ClipperLib.PolyFillType.pftNonZero, ClipperLib.PolyFillType.pftNonZero);
|
|
return result;
|
|
};
|
|
|
|
ClipperLib.Clipper.MinkowskiSum = function ()
|
|
{
|
|
var a = arguments,
|
|
alen = a.length;
|
|
if (alen == 3) // MinkowskiSum(Path pattern, path, pathIsClosed)
|
|
{
|
|
var pattern = a[0],
|
|
path = a[1],
|
|
pathIsClosed = a[2];
|
|
return ClipperLib.Clipper.Minkowski(pattern, path, true, pathIsClosed);
|
|
}
|
|
else if (alen == 4) // MinkowskiSum(pattern, paths, pathFillType, pathIsClosed)
|
|
{
|
|
var pattern = a[0],
|
|
paths = a[1],
|
|
pathFillType = a[2],
|
|
pathIsClosed = a[3];
|
|
var c = new ClipperLib.Clipper(),
|
|
tmp;
|
|
for (var i = 0, ilen = paths.length; i < ilen; ++i)
|
|
{
|
|
var tmp = ClipperLib.Clipper.Minkowski(pattern, paths[i], true, pathIsClosed);
|
|
c.AddPaths(tmp, ClipperLib.PolyType.ptSubject, true);
|
|
}
|
|
if (pathIsClosed) c.AddPaths(paths, ClipperLib.PolyType.ptClip, true);
|
|
var solution = new ClipperLib.Paths();
|
|
c.Execute(ClipperLib.ClipType.ctUnion, solution, pathFillType, pathFillType);
|
|
return solution;
|
|
}
|
|
};
|
|
|
|
ClipperLib.Clipper.MinkowskiDiff = function (pattern, path, pathIsClosed)
|
|
{
|
|
return ClipperLib.Clipper.Minkowski(pattern, path, false, pathIsClosed);
|
|
};
|
|
|
|
ClipperLib.Clipper.PolyTreeToPaths = function (polytree)
|
|
{
|
|
var result = new Array();
|
|
//result.set_Capacity(polytree.get_Total());
|
|
ClipperLib.Clipper.AddPolyNodeToPaths(polytree, ClipperLib.Clipper.NodeType.ntAny, result);
|
|
return result;
|
|
};
|
|
ClipperLib.Clipper.AddPolyNodeToPaths = function (polynode, nt, paths)
|
|
{
|
|
var match = true;
|
|
switch (nt)
|
|
{
|
|
case ClipperLib.Clipper.NodeType.ntOpen:
|
|
return;
|
|
case ClipperLib.Clipper.NodeType.ntClosed:
|
|
match = !polynode.IsOpen;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (polynode.m_polygon.length > 0 && match)
|
|
paths.push(polynode.m_polygon);
|
|
for (var $i3 = 0, $t3 = polynode.Childs(), $l3 = $t3.length, pn = $t3[$i3]; $i3 < $l3; $i3++, pn = $t3[$i3])
|
|
ClipperLib.Clipper.AddPolyNodeToPaths(pn, nt, paths);
|
|
};
|
|
ClipperLib.Clipper.OpenPathsFromPolyTree = function (polytree)
|
|
{
|
|
var result = new ClipperLib.Paths();
|
|
//result.set_Capacity(polytree.ChildCount());
|
|
for (var i = 0, ilen = polytree.ChildCount(); i < ilen; i++)
|
|
if (polytree.Childs()[i].IsOpen)
|
|
result.push(polytree.Childs()[i].m_polygon);
|
|
return result;
|
|
};
|
|
ClipperLib.Clipper.ClosedPathsFromPolyTree = function (polytree)
|
|
{
|
|
var result = new ClipperLib.Paths();
|
|
//result.set_Capacity(polytree.Total());
|
|
ClipperLib.Clipper.AddPolyNodeToPaths(polytree, ClipperLib.Clipper.NodeType.ntClosed, result);
|
|
return result;
|
|
};
|
|
Inherit(ClipperLib.Clipper, ClipperLib.ClipperBase);
|
|
ClipperLib.Clipper.NodeType = {
|
|
ntAny: 0,
|
|
ntOpen: 1,
|
|
ntClosed: 2
|
|
};
|
|
ClipperLib.ClipperOffset = function (miterLimit, arcTolerance)
|
|
{
|
|
if (typeof (miterLimit) == "undefined") miterLimit = 2;
|
|
if (typeof (arcTolerance) == "undefined") arcTolerance = ClipperLib.ClipperOffset.def_arc_tolerance;
|
|
this.m_destPolys = new ClipperLib.Paths();
|
|
this.m_srcPoly = new ClipperLib.Path();
|
|
this.m_destPoly = new ClipperLib.Path();
|
|
this.m_normals = new Array();
|
|
this.m_delta = 0;
|
|
this.m_sinA = 0;
|
|
this.m_sin = 0;
|
|
this.m_cos = 0;
|
|
this.m_miterLim = 0;
|
|
this.m_StepsPerRad = 0;
|
|
this.m_lowest = new ClipperLib.IntPoint();
|
|
this.m_polyNodes = new ClipperLib.PolyNode();
|
|
this.MiterLimit = miterLimit;
|
|
this.ArcTolerance = arcTolerance;
|
|
this.m_lowest.X = -1;
|
|
};
|
|
ClipperLib.ClipperOffset.two_pi = 6.28318530717959;
|
|
ClipperLib.ClipperOffset.def_arc_tolerance = 0.25;
|
|
ClipperLib.ClipperOffset.prototype.Clear = function ()
|
|
{
|
|
ClipperLib.Clear(this.m_polyNodes.Childs());
|
|
this.m_lowest.X = -1;
|
|
};
|
|
ClipperLib.ClipperOffset.Round = ClipperLib.Clipper.Round;
|
|
ClipperLib.ClipperOffset.prototype.AddPath = function (path, joinType, endType)
|
|
{
|
|
var highI = path.length - 1;
|
|
if (highI < 0)
|
|
return;
|
|
var newNode = new ClipperLib.PolyNode();
|
|
newNode.m_jointype = joinType;
|
|
newNode.m_endtype = endType;
|
|
//strip duplicate points from path and also get index to the lowest point ...
|
|
if (endType == ClipperLib.EndType.etClosedLine || endType == ClipperLib.EndType.etClosedPolygon)
|
|
while (highI > 0 && ClipperLib.IntPoint.op_Equality(path[0], path[highI]))
|
|
highI--;
|
|
//newNode.m_polygon.set_Capacity(highI + 1);
|
|
newNode.m_polygon.push(path[0]);
|
|
var j = 0,
|
|
k = 0;
|
|
for (var i = 1; i <= highI; i++)
|
|
if (ClipperLib.IntPoint.op_Inequality(newNode.m_polygon[j], path[i]))
|
|
{
|
|
j++;
|
|
newNode.m_polygon.push(path[i]);
|
|
if (path[i].Y > newNode.m_polygon[k].Y || (path[i].Y == newNode.m_polygon[k].Y && path[i].X < newNode.m_polygon[k].X))
|
|
k = j;
|
|
}
|
|
if ((endType == ClipperLib.EndType.etClosedPolygon && j < 2) || (endType != ClipperLib.EndType.etClosedPolygon && j < 0))
|
|
return;
|
|
this.m_polyNodes.AddChild(newNode);
|
|
//if this path's lowest pt is lower than all the others then update m_lowest
|
|
if (endType != ClipperLib.EndType.etClosedPolygon)
|
|
return;
|
|
if (this.m_lowest.X < 0)
|
|
this.m_lowest = new ClipperLib.IntPoint(0, k);
|
|
else
|
|
{
|
|
var ip = this.m_polyNodes.Childs()[this.m_lowest.X].m_polygon[this.m_lowest.Y];
|
|
if (newNode.m_polygon[k].Y > ip.Y || (newNode.m_polygon[k].Y == ip.Y && newNode.m_polygon[k].X < ip.X))
|
|
this.m_lowest = new ClipperLib.IntPoint(this.m_polyNodes.ChildCount() - 1, k);
|
|
}
|
|
};
|
|
ClipperLib.ClipperOffset.prototype.AddPaths = function (paths, joinType, endType)
|
|
{
|
|
for (var i = 0, ilen = paths.length; i < ilen; i++)
|
|
this.AddPath(paths[i], joinType, endType);
|
|
};
|
|
ClipperLib.ClipperOffset.prototype.FixOrientations = function ()
|
|
{
|
|
//fixup orientations of all closed paths if the orientation of the
|
|
//closed path with the lowermost vertex is wrong ...
|
|
if (this.m_lowest.X >= 0 && !ClipperLib.Clipper.Orientation(this.m_polyNodes.Childs()[this.m_lowest.X].m_polygon))
|
|
{
|
|
for (var i = 0; i < this.m_polyNodes.ChildCount(); i++)
|
|
{
|
|
var node = this.m_polyNodes.Childs()[i];
|
|
if (node.m_endtype == ClipperLib.EndType.etClosedPolygon || (node.m_endtype == ClipperLib.EndType.etClosedLine && ClipperLib.Clipper.Orientation(node.m_polygon)))
|
|
node.m_polygon.reverse();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (var i = 0; i < this.m_polyNodes.ChildCount(); i++)
|
|
{
|
|
var node = this.m_polyNodes.Childs()[i];
|
|
if (node.m_endtype == ClipperLib.EndType.etClosedLine && !ClipperLib.Clipper.Orientation(node.m_polygon))
|
|
node.m_polygon.reverse();
|
|
}
|
|
}
|
|
};
|
|
ClipperLib.ClipperOffset.GetUnitNormal = function (pt1, pt2)
|
|
{
|
|
var dx = (pt2.X - pt1.X);
|
|
var dy = (pt2.Y - pt1.Y);
|
|
if ((dx == 0) && (dy == 0))
|
|
return new ClipperLib.DoublePoint(0, 0);
|
|
var f = 1 / Math.sqrt(dx * dx + dy * dy);
|
|
dx *= f;
|
|
dy *= f;
|
|
return new ClipperLib.DoublePoint(dy, -dx);
|
|
};
|
|
ClipperLib.ClipperOffset.prototype.DoOffset = function (delta)
|
|
{
|
|
this.m_destPolys = new Array();
|
|
this.m_delta = delta;
|
|
//if Zero offset, just copy any CLOSED polygons to m_p and return ...
|
|
if (ClipperLib.ClipperBase.near_zero(delta))
|
|
{
|
|
//this.m_destPolys.set_Capacity(this.m_polyNodes.ChildCount);
|
|
for (var i = 0; i < this.m_polyNodes.ChildCount(); i++)
|
|
{
|
|
var node = this.m_polyNodes.Childs()[i];
|
|
if (node.m_endtype == ClipperLib.EndType.etClosedPolygon)
|
|
this.m_destPolys.push(node.m_polygon);
|
|
}
|
|
return;
|
|
}
|
|
//see offset_triginometry3.svg in the documentation folder ...
|
|
if (this.MiterLimit > 2)
|
|
this.m_miterLim = 2 / (this.MiterLimit * this.MiterLimit);
|
|
else
|
|
this.m_miterLim = 0.5;
|
|
var y;
|
|
if (this.ArcTolerance <= 0)
|
|
y = ClipperLib.ClipperOffset.def_arc_tolerance;
|
|
else if (this.ArcTolerance > Math.abs(delta) * ClipperLib.ClipperOffset.def_arc_tolerance)
|
|
y = Math.abs(delta) * ClipperLib.ClipperOffset.def_arc_tolerance;
|
|
else
|
|
y = this.ArcTolerance;
|
|
//see offset_triginometry2.svg in the documentation folder ...
|
|
var steps = 3.14159265358979 / Math.acos(1 - y / Math.abs(delta));
|
|
this.m_sin = Math.sin(ClipperLib.ClipperOffset.two_pi / steps);
|
|
this.m_cos = Math.cos(ClipperLib.ClipperOffset.two_pi / steps);
|
|
this.m_StepsPerRad = steps / ClipperLib.ClipperOffset.two_pi;
|
|
if (delta < 0)
|
|
this.m_sin = -this.m_sin;
|
|
//this.m_destPolys.set_Capacity(this.m_polyNodes.ChildCount * 2);
|
|
for (var i = 0; i < this.m_polyNodes.ChildCount(); i++)
|
|
{
|
|
var node = this.m_polyNodes.Childs()[i];
|
|
this.m_srcPoly = node.m_polygon;
|
|
var len = this.m_srcPoly.length;
|
|
if (len == 0 || (delta <= 0 && (len < 3 || node.m_endtype != ClipperLib.EndType.etClosedPolygon)))
|
|
continue;
|
|
this.m_destPoly = new Array();
|
|
if (len == 1)
|
|
{
|
|
if (node.m_jointype == ClipperLib.JoinType.jtRound)
|
|
{
|
|
var X = 1,
|
|
Y = 0;
|
|
for (var j = 1; j <= steps; j++)
|
|
{
|
|
this.m_destPoly.push(new ClipperLib.IntPoint(ClipperLib.ClipperOffset.Round(this.m_srcPoly[0].X + X * delta), ClipperLib.ClipperOffset.Round(this.m_srcPoly[0].Y + Y * delta)));
|
|
var X2 = X;
|
|
X = X * this.m_cos - this.m_sin * Y;
|
|
Y = X2 * this.m_sin + Y * this.m_cos;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
var X = -1,
|
|
Y = -1;
|
|
for (var j = 0; j < 4; ++j)
|
|
{
|
|
this.m_destPoly.push(new ClipperLib.IntPoint(ClipperLib.ClipperOffset.Round(this.m_srcPoly[0].X + X * delta), ClipperLib.ClipperOffset.Round(this.m_srcPoly[0].Y + Y * delta)));
|
|
if (X < 0)
|
|
X = 1;
|
|
else if (Y < 0)
|
|
Y = 1;
|
|
else
|
|
X = -1;
|
|
}
|
|
}
|
|
this.m_destPolys.push(this.m_destPoly);
|
|
continue;
|
|
}
|
|
//build m_normals ...
|
|
this.m_normals.length = 0;
|
|
//this.m_normals.set_Capacity(len);
|
|
for (var j = 0; j < len - 1; j++)
|
|
this.m_normals.push(ClipperLib.ClipperOffset.GetUnitNormal(this.m_srcPoly[j], this.m_srcPoly[j + 1]));
|
|
if (node.m_endtype == ClipperLib.EndType.etClosedLine || node.m_endtype == ClipperLib.EndType.etClosedPolygon)
|
|
this.m_normals.push(ClipperLib.ClipperOffset.GetUnitNormal(this.m_srcPoly[len - 1], this.m_srcPoly[0]));
|
|
else
|
|
this.m_normals.push(new ClipperLib.DoublePoint(this.m_normals[len - 2]));
|
|
if (node.m_endtype == ClipperLib.EndType.etClosedPolygon)
|
|
{
|
|
var k = len - 1;
|
|
for (var j = 0; j < len; j++)
|
|
k = this.OffsetPoint(j, k, node.m_jointype);
|
|
this.m_destPolys.push(this.m_destPoly);
|
|
}
|
|
else if (node.m_endtype == ClipperLib.EndType.etClosedLine)
|
|
{
|
|
var k = len - 1;
|
|
for (var j = 0; j < len; j++)
|
|
k = this.OffsetPoint(j, k, node.m_jointype);
|
|
this.m_destPolys.push(this.m_destPoly);
|
|
this.m_destPoly = new Array();
|
|
//re-build m_normals ...
|
|
var n = this.m_normals[len - 1];
|
|
for (var j = len - 1; j > 0; j--)
|
|
this.m_normals[j] = new ClipperLib.DoublePoint(-this.m_normals[j - 1].X, -this.m_normals[j - 1].Y);
|
|
this.m_normals[0] = new ClipperLib.DoublePoint(-n.X, -n.Y);
|
|
k = 0;
|
|
for (var j = len - 1; j >= 0; j--)
|
|
k = this.OffsetPoint(j, k, node.m_jointype);
|
|
this.m_destPolys.push(this.m_destPoly);
|
|
}
|
|
else
|
|
{
|
|
var k = 0;
|
|
for (var j = 1; j < len - 1; ++j)
|
|
k = this.OffsetPoint(j, k, node.m_jointype);
|
|
var pt1;
|
|
if (node.m_endtype == ClipperLib.EndType.etOpenButt)
|
|
{
|
|
var j = len - 1;
|
|
pt1 = new ClipperLib.IntPoint(ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].X + this.m_normals[j].X * delta), ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].Y + this.m_normals[j].Y * delta));
|
|
this.m_destPoly.push(pt1);
|
|
pt1 = new ClipperLib.IntPoint(ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].X - this.m_normals[j].X * delta), ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].Y - this.m_normals[j].Y * delta));
|
|
this.m_destPoly.push(pt1);
|
|
}
|
|
else
|
|
{
|
|
var j = len - 1;
|
|
k = len - 2;
|
|
this.m_sinA = 0;
|
|
this.m_normals[j] = new ClipperLib.DoublePoint(-this.m_normals[j].X, -this.m_normals[j].Y);
|
|
if (node.m_endtype == ClipperLib.EndType.etOpenSquare)
|
|
this.DoSquare(j, k);
|
|
else
|
|
this.DoRound(j, k);
|
|
}
|
|
//re-build m_normals ...
|
|
for (var j = len - 1; j > 0; j--)
|
|
this.m_normals[j] = new ClipperLib.DoublePoint(-this.m_normals[j - 1].X, -this.m_normals[j - 1].Y);
|
|
this.m_normals[0] = new ClipperLib.DoublePoint(-this.m_normals[1].X, -this.m_normals[1].Y);
|
|
k = len - 1;
|
|
for (var j = k - 1; j > 0; --j)
|
|
k = this.OffsetPoint(j, k, node.m_jointype);
|
|
if (node.m_endtype == ClipperLib.EndType.etOpenButt)
|
|
{
|
|
pt1 = new ClipperLib.IntPoint(ClipperLib.ClipperOffset.Round(this.m_srcPoly[0].X - this.m_normals[0].X * delta), ClipperLib.ClipperOffset.Round(this.m_srcPoly[0].Y - this.m_normals[0].Y * delta));
|
|
this.m_destPoly.push(pt1);
|
|
pt1 = new ClipperLib.IntPoint(ClipperLib.ClipperOffset.Round(this.m_srcPoly[0].X + this.m_normals[0].X * delta), ClipperLib.ClipperOffset.Round(this.m_srcPoly[0].Y + this.m_normals[0].Y * delta));
|
|
this.m_destPoly.push(pt1);
|
|
}
|
|
else
|
|
{
|
|
k = 1;
|
|
this.m_sinA = 0;
|
|
if (node.m_endtype == ClipperLib.EndType.etOpenSquare)
|
|
this.DoSquare(0, 1);
|
|
else
|
|
this.DoRound(0, 1);
|
|
}
|
|
this.m_destPolys.push(this.m_destPoly);
|
|
}
|
|
}
|
|
};
|
|
ClipperLib.ClipperOffset.prototype.Execute = function ()
|
|
{
|
|
var a = arguments,
|
|
ispolytree = a[0] instanceof ClipperLib.PolyTree;
|
|
if (!ispolytree) // function (solution, delta)
|
|
{
|
|
var solution = a[0],
|
|
delta = a[1];
|
|
ClipperLib.Clear(solution);
|
|
this.FixOrientations();
|
|
this.DoOffset(delta);
|
|
//now clean up 'corners' ...
|
|
var clpr = new ClipperLib.Clipper(0);
|
|
clpr.AddPaths(this.m_destPolys, ClipperLib.PolyType.ptSubject, true);
|
|
if (delta > 0)
|
|
{
|
|
clpr.Execute(ClipperLib.ClipType.ctUnion, solution, ClipperLib.PolyFillType.pftPositive, ClipperLib.PolyFillType.pftPositive);
|
|
}
|
|
else
|
|
{
|
|
var r = ClipperLib.Clipper.GetBounds(this.m_destPolys);
|
|
var outer = new ClipperLib.Path();
|
|
outer.push(new ClipperLib.IntPoint(r.left - 10, r.bottom + 10));
|
|
outer.push(new ClipperLib.IntPoint(r.right + 10, r.bottom + 10));
|
|
outer.push(new ClipperLib.IntPoint(r.right + 10, r.top - 10));
|
|
outer.push(new ClipperLib.IntPoint(r.left - 10, r.top - 10));
|
|
clpr.AddPath(outer, ClipperLib.PolyType.ptSubject, true);
|
|
clpr.ReverseSolution = true;
|
|
clpr.Execute(ClipperLib.ClipType.ctUnion, solution, ClipperLib.PolyFillType.pftNegative, ClipperLib.PolyFillType.pftNegative);
|
|
if (solution.length > 0)
|
|
solution.splice(0, 1);
|
|
}
|
|
//console.warn(JSON.stringify(solution));
|
|
}
|
|
else // function (polytree, delta)
|
|
{
|
|
var solution = a[0],
|
|
delta = a[1];
|
|
solution.Clear();
|
|
this.FixOrientations();
|
|
this.DoOffset(delta);
|
|
//now clean up 'corners' ...
|
|
var clpr = new ClipperLib.Clipper(0);
|
|
clpr.AddPaths(this.m_destPolys, ClipperLib.PolyType.ptSubject, true);
|
|
if (delta > 0)
|
|
{
|
|
clpr.Execute(ClipperLib.ClipType.ctUnion, solution, ClipperLib.PolyFillType.pftPositive, ClipperLib.PolyFillType.pftPositive);
|
|
}
|
|
else
|
|
{
|
|
var r = ClipperLib.Clipper.GetBounds(this.m_destPolys);
|
|
var outer = new ClipperLib.Path();
|
|
outer.push(new ClipperLib.IntPoint(r.left - 10, r.bottom + 10));
|
|
outer.push(new ClipperLib.IntPoint(r.right + 10, r.bottom + 10));
|
|
outer.push(new ClipperLib.IntPoint(r.right + 10, r.top - 10));
|
|
outer.push(new ClipperLib.IntPoint(r.left - 10, r.top - 10));
|
|
clpr.AddPath(outer, ClipperLib.PolyType.ptSubject, true);
|
|
clpr.ReverseSolution = true;
|
|
clpr.Execute(ClipperLib.ClipType.ctUnion, solution, ClipperLib.PolyFillType.pftNegative, ClipperLib.PolyFillType.pftNegative);
|
|
//remove the outer PolyNode rectangle ...
|
|
if (solution.ChildCount() == 1 && solution.Childs()[0].ChildCount() > 0)
|
|
{
|
|
var outerNode = solution.Childs()[0];
|
|
//solution.Childs.set_Capacity(outerNode.ChildCount);
|
|
solution.Childs()[0] = outerNode.Childs()[0];
|
|
for (var i = 1; i < outerNode.ChildCount(); i++)
|
|
solution.AddChild(outerNode.Childs()[i]);
|
|
}
|
|
else
|
|
solution.Clear();
|
|
}
|
|
}
|
|
};
|
|
ClipperLib.ClipperOffset.prototype.OffsetPoint = function (j, k, jointype)
|
|
{
|
|
this.m_sinA = (this.m_normals[k].X * this.m_normals[j].Y - this.m_normals[j].X * this.m_normals[k].Y);
|
|
if (this.m_sinA < 0.00005 && this.m_sinA > -0.00005)
|
|
return k;
|
|
else if (this.m_sinA > 1)
|
|
this.m_sinA = 1.0;
|
|
else if (this.m_sinA < -1)
|
|
this.m_sinA = -1.0;
|
|
if (this.m_sinA * this.m_delta < 0)
|
|
{
|
|
this.m_destPoly.push(new ClipperLib.IntPoint(ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].X + this.m_normals[k].X * this.m_delta),
|
|
ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].Y + this.m_normals[k].Y * this.m_delta)));
|
|
this.m_destPoly.push(new ClipperLib.IntPoint(this.m_srcPoly[j]));
|
|
this.m_destPoly.push(new ClipperLib.IntPoint(ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].X + this.m_normals[j].X * this.m_delta),
|
|
ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].Y + this.m_normals[j].Y * this.m_delta)));
|
|
}
|
|
else
|
|
switch (jointype)
|
|
{
|
|
case ClipperLib.JoinType.jtMiter:
|
|
{
|
|
var r = 1 + (this.m_normals[j].X * this.m_normals[k].X + this.m_normals[j].Y * this.m_normals[k].Y);
|
|
if (r >= this.m_miterLim)
|
|
this.DoMiter(j, k, r);
|
|
else
|
|
this.DoSquare(j, k);
|
|
break;
|
|
}
|
|
case ClipperLib.JoinType.jtSquare:
|
|
this.DoSquare(j, k);
|
|
break;
|
|
case ClipperLib.JoinType.jtRound:
|
|
this.DoRound(j, k);
|
|
break;
|
|
}
|
|
k = j;
|
|
return k;
|
|
};
|
|
ClipperLib.ClipperOffset.prototype.DoSquare = function (j, k)
|
|
{
|
|
var dx = Math.tan(Math.atan2(this.m_sinA,
|
|
this.m_normals[k].X * this.m_normals[j].X + this.m_normals[k].Y * this.m_normals[j].Y) / 4);
|
|
this.m_destPoly.push(new ClipperLib.IntPoint(
|
|
ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].X + this.m_delta * (this.m_normals[k].X - this.m_normals[k].Y * dx)),
|
|
ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].Y + this.m_delta * (this.m_normals[k].Y + this.m_normals[k].X * dx))));
|
|
this.m_destPoly.push(new ClipperLib.IntPoint(
|
|
ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].X + this.m_delta * (this.m_normals[j].X + this.m_normals[j].Y * dx)),
|
|
ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].Y + this.m_delta * (this.m_normals[j].Y - this.m_normals[j].X * dx))));
|
|
};
|
|
ClipperLib.ClipperOffset.prototype.DoMiter = function (j, k, r)
|
|
{
|
|
var q = this.m_delta / r;
|
|
this.m_destPoly.push(new ClipperLib.IntPoint(
|
|
ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].X + (this.m_normals[k].X + this.m_normals[j].X) * q),
|
|
ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].Y + (this.m_normals[k].Y + this.m_normals[j].Y) * q)));
|
|
};
|
|
ClipperLib.ClipperOffset.prototype.DoRound = function (j, k)
|
|
{
|
|
var a = Math.atan2(this.m_sinA,
|
|
this.m_normals[k].X * this.m_normals[j].X + this.m_normals[k].Y * this.m_normals[j].Y);
|
|
var steps = ClipperLib.Cast_Int32(ClipperLib.ClipperOffset.Round(this.m_StepsPerRad * Math.abs(a)));
|
|
var X = this.m_normals[k].X,
|
|
Y = this.m_normals[k].Y,
|
|
X2;
|
|
for (var i = 0; i < steps; ++i)
|
|
{
|
|
this.m_destPoly.push(new ClipperLib.IntPoint(
|
|
ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].X + X * this.m_delta),
|
|
ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].Y + Y * this.m_delta)));
|
|
X2 = X;
|
|
X = X * this.m_cos - this.m_sin * Y;
|
|
Y = X2 * this.m_sin + Y * this.m_cos;
|
|
}
|
|
this.m_destPoly.push(new ClipperLib.IntPoint(
|
|
ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].X + this.m_normals[j].X * this.m_delta),
|
|
ClipperLib.ClipperOffset.Round(this.m_srcPoly[j].Y + this.m_normals[j].Y * this.m_delta)));
|
|
};
|
|
ClipperLib.Error = function (message)
|
|
{
|
|
try
|
|
{
|
|
throw new Error(message);
|
|
}
|
|
catch (err)
|
|
{
|
|
console.warn(err.message);
|
|
}
|
|
};
|
|
// ---------------------------------
|
|
// JS extension by Timo 2013
|
|
ClipperLib.JS = {};
|
|
ClipperLib.JS.AreaOfPolygon = function (poly, scale)
|
|
{
|
|
if (!scale) scale = 1;
|
|
return ClipperLib.Clipper.Area(poly) / (scale * scale);
|
|
};
|
|
ClipperLib.JS.AreaOfPolygons = function (poly, scale)
|
|
{
|
|
if (!scale) scale = 1;
|
|
var area = 0;
|
|
for (var i = 0; i < poly.length; i++)
|
|
{
|
|
area += ClipperLib.Clipper.Area(poly[i]);
|
|
}
|
|
return area / (scale * scale);
|
|
};
|
|
ClipperLib.JS.BoundsOfPath = function (path, scale)
|
|
{
|
|
return ClipperLib.JS.BoundsOfPaths([path], scale);
|
|
};
|
|
ClipperLib.JS.BoundsOfPaths = function (paths, scale)
|
|
{
|
|
if (!scale) scale = 1;
|
|
var bounds = ClipperLib.Clipper.GetBounds(paths);
|
|
bounds.left /= scale;
|
|
bounds.bottom /= scale;
|
|
bounds.right /= scale;
|
|
bounds.top /= scale;
|
|
return bounds;
|
|
};
|
|
// Clean() joins vertices that are too near each other
|
|
// and causes distortion to offsetted polygons without cleaning
|
|
ClipperLib.JS.Clean = function (polygon, delta)
|
|
{
|
|
if (!(polygon instanceof Array)) return [];
|
|
var isPolygons = polygon[0] instanceof Array;
|
|
var polygon = ClipperLib.JS.Clone(polygon);
|
|
if (typeof delta != "number" || delta === null)
|
|
{
|
|
ClipperLib.Error("Delta is not a number in Clean().");
|
|
return polygon;
|
|
}
|
|
if (polygon.length === 0 || (polygon.length == 1 && polygon[0].length === 0) || delta < 0) return polygon;
|
|
if (!isPolygons) polygon = [polygon];
|
|
var k_length = polygon.length;
|
|
var len, poly, result, d, p, j, i;
|
|
var results = [];
|
|
for (var k = 0; k < k_length; k++)
|
|
{
|
|
poly = polygon[k];
|
|
len = poly.length;
|
|
if (len === 0) continue;
|
|
else if (len < 3)
|
|
{
|
|
result = poly;
|
|
results.push(result);
|
|
continue;
|
|
}
|
|
result = poly;
|
|
d = delta * delta;
|
|
//d = Math.floor(c_delta * c_delta);
|
|
p = poly[0];
|
|
j = 1;
|
|
for (i = 1; i < len; i++)
|
|
{
|
|
if ((poly[i].X - p.X) * (poly[i].X - p.X) +
|
|
(poly[i].Y - p.Y) * (poly[i].Y - p.Y) <= d)
|
|
continue;
|
|
result[j] = poly[i];
|
|
p = poly[i];
|
|
j++;
|
|
}
|
|
p = poly[j - 1];
|
|
if ((poly[0].X - p.X) * (poly[0].X - p.X) +
|
|
(poly[0].Y - p.Y) * (poly[0].Y - p.Y) <= d)
|
|
j--;
|
|
if (j < len)
|
|
result.splice(j, len - j);
|
|
if (result.length) results.push(result);
|
|
}
|
|
if (!isPolygons && results.length) results = results[0];
|
|
else if (!isPolygons && results.length === 0) results = [];
|
|
else if (isPolygons && results.length === 0) results = [
|
|
[]
|
|
];
|
|
return results;
|
|
}
|
|
// Make deep copy of Polygons or Polygon
|
|
// so that also IntPoint objects are cloned and not only referenced
|
|
// This should be the fastest way
|
|
ClipperLib.JS.Clone = function (polygon)
|
|
{
|
|
if (!(polygon instanceof Array)) return [];
|
|
if (polygon.length === 0) return [];
|
|
else if (polygon.length == 1 && polygon[0].length === 0) return [[]];
|
|
var isPolygons = polygon[0] instanceof Array;
|
|
if (!isPolygons) polygon = [polygon];
|
|
var len = polygon.length,
|
|
plen, i, j, result;
|
|
var results = new Array(len);
|
|
for (i = 0; i < len; i++)
|
|
{
|
|
plen = polygon[i].length;
|
|
result = new Array(plen);
|
|
for (j = 0; j < plen; j++)
|
|
{
|
|
result[j] = {
|
|
X: polygon[i][j].X,
|
|
Y: polygon[i][j].Y
|
|
};
|
|
}
|
|
results[i] = result;
|
|
}
|
|
if (!isPolygons) results = results[0];
|
|
return results;
|
|
};
|
|
// Removes points that doesn't affect much to the visual appearance.
|
|
// If middle point is at or under certain distance (tolerance) of the line segment between
|
|
// start and end point, the middle point is removed.
|
|
ClipperLib.JS.Lighten = function (polygon, tolerance)
|
|
{
|
|
if (!(polygon instanceof Array)) return [];
|
|
if (typeof tolerance != "number" || tolerance === null)
|
|
{
|
|
ClipperLib.Error("Tolerance is not a number in Lighten().")
|
|
return ClipperLib.JS.Clone(polygon);
|
|
}
|
|
if (polygon.length === 0 || (polygon.length == 1 && polygon[0].length === 0) || tolerance < 0)
|
|
{
|
|
return ClipperLib.JS.Clone(polygon);
|
|
}
|
|
if (!(polygon[0] instanceof Array)) polygon = [polygon];
|
|
var i, j, poly, k, poly2, plen, A, B, P, d, rem, addlast;
|
|
var bxax, byay, l, ax, ay;
|
|
var len = polygon.length;
|
|
var toleranceSq = tolerance * tolerance;
|
|
var results = [];
|
|
for (i = 0; i < len; i++)
|
|
{
|
|
poly = polygon[i];
|
|
plen = poly.length;
|
|
if (plen == 0) continue;
|
|
for (k = 0; k < 1000000; k++) // could be forever loop, but wiser to restrict max repeat count
|
|
{
|
|
poly2 = [];
|
|
plen = poly.length;
|
|
// the first have to added to the end, if first and last are not the same
|
|
// this way we ensure that also the actual last point can be removed if needed
|
|
if (poly[plen - 1].X != poly[0].X || poly[plen - 1].Y != poly[0].Y)
|
|
{
|
|
addlast = 1;
|
|
poly.push(
|
|
{
|
|
X: poly[0].X,
|
|
Y: poly[0].Y
|
|
});
|
|
plen = poly.length;
|
|
}
|
|
else addlast = 0;
|
|
rem = []; // Indexes of removed points
|
|
for (j = 0; j < plen - 2; j++)
|
|
{
|
|
A = poly[j]; // Start point of line segment
|
|
P = poly[j + 1]; // Middle point. This is the one to be removed.
|
|
B = poly[j + 2]; // End point of line segment
|
|
ax = A.X;
|
|
ay = A.Y;
|
|
bxax = B.X - ax;
|
|
byay = B.Y - ay;
|
|
if (bxax !== 0 || byay !== 0) // To avoid Nan, when A==P && P==B. And to avoid peaks (A==B && A!=P), which have lenght, but not area.
|
|
{
|
|
l = ((P.X - ax) * bxax + (P.Y - ay) * byay) / (bxax * bxax + byay * byay);
|
|
if (l > 1)
|
|
{
|
|
ax = B.X;
|
|
ay = B.Y;
|
|
}
|
|
else if (l > 0)
|
|
{
|
|
ax += bxax * l;
|
|
ay += byay * l;
|
|
}
|
|
}
|
|
bxax = P.X - ax;
|
|
byay = P.Y - ay;
|
|
d = bxax * bxax + byay * byay;
|
|
if (d <= toleranceSq)
|
|
{
|
|
rem[j + 1] = 1;
|
|
j++; // when removed, transfer the pointer to the next one
|
|
}
|
|
}
|
|
// add all unremoved points to poly2
|
|
poly2.push(
|
|
{
|
|
X: poly[0].X,
|
|
Y: poly[0].Y
|
|
});
|
|
for (j = 1; j < plen - 1; j++)
|
|
if (!rem[j]) poly2.push(
|
|
{
|
|
X: poly[j].X,
|
|
Y: poly[j].Y
|
|
});
|
|
poly2.push(
|
|
{
|
|
X: poly[plen - 1].X,
|
|
Y: poly[plen - 1].Y
|
|
});
|
|
// if the first point was added to the end, remove it
|
|
if (addlast) poly.pop();
|
|
// break, if there was not anymore removed points
|
|
if (!rem.length) break;
|
|
// else continue looping using poly2, to check if there are points to remove
|
|
else poly = poly2;
|
|
}
|
|
plen = poly2.length;
|
|
// remove duplicate from end, if needed
|
|
if (poly2[plen - 1].X == poly2[0].X && poly2[plen - 1].Y == poly2[0].Y)
|
|
{
|
|
poly2.pop();
|
|
}
|
|
if (poly2.length > 2) // to avoid two-point-polygons
|
|
results.push(poly2);
|
|
}
|
|
if (!polygon[0] instanceof Array) results = results[0];
|
|
if (typeof (results) == "undefined") results = [
|
|
[]
|
|
];
|
|
return results;
|
|
}
|
|
ClipperLib.JS.PerimeterOfPath = function (path, closed, scale)
|
|
{
|
|
if (typeof (path) == "undefined") return 0;
|
|
var sqrt = Math.sqrt;
|
|
var perimeter = 0.0;
|
|
var p1, p2, p1x = 0.0,
|
|
p1y = 0.0,
|
|
p2x = 0.0,
|
|
p2y = 0.0;
|
|
var j = path.length;
|
|
if (j < 2) return 0;
|
|
if (closed)
|
|
{
|
|
path[j] = path[0];
|
|
j++;
|
|
}
|
|
while (--j)
|
|
{
|
|
p1 = path[j];
|
|
p1x = p1.X;
|
|
p1y = p1.Y;
|
|
p2 = path[j - 1];
|
|
p2x = p2.X;
|
|
p2y = p2.Y;
|
|
perimeter += sqrt((p1x - p2x) * (p1x - p2x) + (p1y - p2y) * (p1y - p2y));
|
|
}
|
|
if (closed) path.pop();
|
|
return perimeter / scale;
|
|
};
|
|
ClipperLib.JS.PerimeterOfPaths = function (paths, closed, scale)
|
|
{
|
|
if (!scale) scale = 1;
|
|
var perimeter = 0;
|
|
for (var i = 0; i < paths.length; i++)
|
|
{
|
|
perimeter += ClipperLib.JS.PerimeterOfPath(paths[i], closed, scale);
|
|
}
|
|
return perimeter;
|
|
};
|
|
ClipperLib.JS.ScaleDownPath = function (path, scale)
|
|
{
|
|
var i, p;
|
|
if (!scale) scale = 1;
|
|
i = path.length;
|
|
while (i--)
|
|
{
|
|
p = path[i];
|
|
p.X = p.X / scale;
|
|
p.Y = p.Y / scale;
|
|
}
|
|
};
|
|
ClipperLib.JS.ScaleDownPaths = function (paths, scale)
|
|
{
|
|
var i, j, p, round = Math.round;
|
|
if (!scale) scale = 1;
|
|
i = paths.length;
|
|
while (i--)
|
|
{
|
|
j = paths[i].length;
|
|
while (j--)
|
|
{
|
|
p = paths[i][j];
|
|
p.X = p.X / scale;
|
|
p.Y = p.Y / scale;
|
|
}
|
|
}
|
|
};
|
|
ClipperLib.JS.ScaleUpPath = function (path, scale)
|
|
{
|
|
var i, p, round = Math.round;
|
|
if (!scale) scale = 1;
|
|
i = path.length;
|
|
while (i--)
|
|
{
|
|
p = path[i];
|
|
p.X = round(p.X * scale);
|
|
p.Y = round(p.Y * scale);
|
|
}
|
|
};
|
|
ClipperLib.JS.ScaleUpPaths = function (paths, scale)
|
|
{
|
|
var i, j, p, round = Math.round;
|
|
if (!scale) scale = 1;
|
|
i = paths.length;
|
|
while (i--)
|
|
{
|
|
j = paths[i].length;
|
|
while (j--)
|
|
{
|
|
p = paths[i][j];
|
|
p.X = round(p.X * scale);
|
|
p.Y = round(p.Y * scale);
|
|
}
|
|
}
|
|
};
|
|
ClipperLib.ExPolygons = function ()
|
|
{
|
|
return [];
|
|
}
|
|
ClipperLib.ExPolygon = function ()
|
|
{
|
|
this.outer = null;
|
|
this.holes = null;
|
|
};
|
|
ClipperLib.JS.AddOuterPolyNodeToExPolygons = function (polynode, expolygons)
|
|
{
|
|
var ep = new ClipperLib.ExPolygon();
|
|
ep.outer = polynode.Contour();
|
|
var childs = polynode.Childs();
|
|
var ilen = childs.length;
|
|
ep.holes = new Array(ilen);
|
|
var node, n, i, j, childs2, jlen;
|
|
for (i = 0; i < ilen; i++)
|
|
{
|
|
node = childs[i];
|
|
ep.holes[i] = node.Contour();
|
|
//Add outer polygons contained by (nested within) holes ...
|
|
for (j = 0, childs2 = node.Childs(), jlen = childs2.length; j < jlen; j++)
|
|
{
|
|
n = childs2[j];
|
|
ClipperLib.JS.AddOuterPolyNodeToExPolygons(n, expolygons);
|
|
}
|
|
}
|
|
expolygons.push(ep);
|
|
};
|
|
ClipperLib.JS.ExPolygonsToPaths = function (expolygons)
|
|
{
|
|
var a, i, alen, ilen;
|
|
var paths = new ClipperLib.Paths();
|
|
for (a = 0, alen = expolygons.length; a < alen; a++)
|
|
{
|
|
paths.push(expolygons[a].outer);
|
|
for (i = 0, ilen = expolygons[a].holes.length; i < ilen; i++)
|
|
{
|
|
paths.push(expolygons[a].holes[i]);
|
|
}
|
|
}
|
|
return paths;
|
|
}
|
|
ClipperLib.JS.PolyTreeToExPolygons = function (polytree)
|
|
{
|
|
var expolygons = new ClipperLib.ExPolygons();
|
|
var node, i, childs, ilen;
|
|
for (i = 0, childs = polytree.Childs(), ilen = childs.length; i < ilen; i++)
|
|
{
|
|
node = childs[i];
|
|
ClipperLib.JS.AddOuterPolyNodeToExPolygons(node, expolygons);
|
|
}
|
|
return expolygons;
|
|
};
|
|
})(); |