<!DOCTYPE html>
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<head>
<title>three.js webgl - geometry - extrude shapes from geodata</title>
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<style>
body {
font-family: Monospace;
background-color: #f0f0f0;
margin: 0px;
overflow: hidden;
}
</style>
</head>
<body>
<canvas id="debug" style="position:absolute; left:100px"></canvas>
<script>
'use strict';
</script>
<script type="text/javascript" src="../build/three.min.js"></script>
<script src="js/libs/stats.min.js"></script>
<script>
// From d3-threeD.js
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
function d3threeD(exports) {
const DEGS_TO_RADS = Math.PI / 180, UNIT_SIZE = 100;
const DIGIT_0 = 48, DIGIT_9 = 57, COMMA = 44, SPACE = 32, PERIOD = 46, MINUS = 45;
exports.transformSVGPath =
function transformSVGPath(pathStr) {
var path = new THREE.Shape();
var idx = 1, len = pathStr.length, activeCmd,
x = 0, y = 0, nx = 0, ny = 0, firstX = null, firstY = null,
x1 = 0, x2 = 0, y1 = 0, y2 = 0,
rx = 0, ry = 0, xar = 0, laf = 0, sf = 0, cx, cy;
function eatNum() {
var sidx, c, isFloat = false, s;
// eat delims
while (idx < len) {
c = pathStr.charCodeAt(idx);
if (c !== COMMA && c !== SPACE)
break;
idx++;
}
if (c === MINUS)
sidx = idx++;
else
sidx = idx;
// eat number
while (idx < len) {
c = pathStr.charCodeAt(idx);
if (DIGIT_0 <= c && c <= DIGIT_9) {
idx++;
continue;
}
else if (c === PERIOD) {
idx++;
isFloat = true;
continue;
}
s = pathStr.substring(sidx, idx);
return isFloat ? parseFloat(s) : parseInt(s);
}
s = pathStr.substring(sidx);
return isFloat ? parseFloat(s) : parseInt(s);
}
function nextIsNum() {
var c;
// do permanently eat any delims...
while (idx < len) {
c = pathStr.charCodeAt(idx);
if (c !== COMMA && c !== SPACE)
break;
idx++;
}
c = pathStr.charCodeAt(idx);
return (c === MINUS || (DIGIT_0 <= c && c <= DIGIT_9));
}
var canRepeat;
activeCmd = pathStr[0];
while (idx <= len) {
canRepeat = true;
switch (activeCmd) {
// moveto commands, become lineto's if repeated
case 'M':
x = eatNum();
y = eatNum();
path.moveTo(x, y);
activeCmd = 'L';
firstX = x;
firstY = y;
break;
case 'm':
x += eatNum();
y += eatNum();
path.moveTo(x, y);
activeCmd = 'l';
firstX = x;
firstY = y;
break;
case 'Z':
case 'z':
canRepeat = false;
if (x !== firstX || y !== firstY)
path.lineTo(firstX, firstY);
break;
// - lines!
case 'L':
case 'H':
case 'V':
nx = (activeCmd === 'V') ? x : eatNum();
ny = (activeCmd === 'H') ? y : eatNum();
path.lineTo(nx, ny);
x = nx;
y = ny;
break;
case 'l':
case 'h':
case 'v':
nx = (activeCmd === 'v') ? x : (x + eatNum());
ny = (activeCmd === 'h') ? y : (y + eatNum());
path.lineTo(nx, ny);
x = nx;
y = ny;
break;
// - cubic bezier
case 'C':
x1 = eatNum(); y1 = eatNum();
case 'S':
if (activeCmd === 'S') {
x1 = 2 * x - x2; y1 = 2 * y - y2;
}
x2 = eatNum();
y2 = eatNum();
nx = eatNum();
ny = eatNum();
path.bezierCurveTo(x1, y1, x2, y2, nx, ny);
x = nx; y = ny;
break;
case 'c':
x1 = x + eatNum();
y1 = y + eatNum();
case 's':
if (activeCmd === 's') {
x1 = 2 * x - x2;
y1 = 2 * y - y2;
}
x2 = x + eatNum();
y2 = y + eatNum();
nx = x + eatNum();
ny = y + eatNum();
path.bezierCurveTo(x1, y1, x2, y2, nx, ny);
x = nx; y = ny;
break;
// - quadratic bezier
case 'Q':
x1 = eatNum(); y1 = eatNum();
case 'T':
if (activeCmd === 'T') {
x1 = 2 * x - x1;
y1 = 2 * y - y1;
}
nx = eatNum();
ny = eatNum();
path.quadraticCurveTo(x1, y1, nx, ny);
x = nx;
y = ny;
break;
case 'q':
x1 = x + eatNum();
y1 = y + eatNum();
case 't':
if (activeCmd === 't') {
x1 = 2 * x - x1;
y1 = 2 * y - y1;
}
nx = x + eatNum();
ny = y + eatNum();
path.quadraticCurveTo(x1, y1, nx, ny);
x = nx; y = ny;
break;
// - elliptical arc
case 'A':
rx = eatNum();
ry = eatNum();
xar = eatNum() * DEGS_TO_RADS;
laf = eatNum();
sf = eatNum();
nx = eatNum();
ny = eatNum();
if (rx !== ry) {
console.warn("Forcing elliptical arc to be a circular one :(",
rx, ry);
}
// SVG implementation notes does all the math for us! woo!
// http://www.w3.org/TR/SVG/implnote.html#ArcImplementationNotes
// step1, using x1 as x1'
x1 = Math.cos(xar) * (x - nx) / 2 + Math.sin(xar) * (y - ny) / 2;
y1 = -Math.sin(xar) * (x - nx) / 2 + Math.cos(xar) * (y - ny) / 2;
// step 2, using x2 as cx'
var norm = Math.sqrt(
(rx*rx * ry*ry - rx*rx * y1*y1 - ry*ry * x1*x1) /
(rx*rx * y1*y1 + ry*ry * x1*x1));
if (laf === sf)
norm = -norm;
x2 = norm * rx * y1 / ry;
y2 = norm * -ry * x1 / rx;
// step 3
cx = Math.cos(xar) * x2 - Math.sin(xar) * y2 + (x + nx) / 2;
cy = Math.sin(xar) * x2 + Math.cos(xar) * y2 + (y + ny) / 2;
var u = new THREE.Vector2(1, 0),
v = new THREE.Vector2((x1 - x2) / rx,
(y1 - y2) / ry);
var startAng = Math.acos(u.dot(v) / u.length() / v.length());
if (u.x * v.y - u.y * v.x < 0)
startAng = -startAng;
// we can reuse 'v' from start angle as our 'u' for delta angle
u.x = (-x1 - x2) / rx;
u.y = (-y1 - y2) / ry;
var deltaAng = Math.acos(v.dot(u) / v.length() / u.length());
// This normalization ends up making our curves fail to triangulate...
if (v.x * u.y - v.y * u.x < 0)
deltaAng = -deltaAng;
if (!sf && deltaAng > 0)
deltaAng -= Math.PI * 2;
if (sf && deltaAng < 0)
deltaAng += Math.PI * 2;
path.absarc(cx, cy, rx, startAng, startAng + deltaAng, sf);
x = nx;
y = ny;
break;
default:
throw new Error("weird path command: " + activeCmd);
}
// just reissue the command
if (canRepeat && nextIsNum())
continue;
activeCmd = pathStr[idx++];
}
return path;
}
}
var $d3g = {};
d3threeD($d3g);
</script>
<script>
/// Part from g0v/twgeojson
/// Graphic Engine and Geo Data Init Functions
var addGeoObject = function( group, svgObject ) {
var i,j, len, len1;
var path, mesh, color, material, amount, simpleShapes, simpleShape, shape3d, x, toAdd, results = [];
var thePaths = svgObject.paths;
var theAmounts = svgObject.amounts;
var theColors = svgObject.colors;
var theCenter = svgObject.center;
len = thePaths.length;
for (i = 0; i < len; ++i) {
path = $d3g.transformSVGPath( thePaths[i] );
color = new THREE.Color( theColors[i] );
material = new THREE.MeshLambertMaterial({
color: color,
emissive: color,
});
amount = theAmounts[i];
simpleShapes = path.toShapes(true);
len1 = simpleShapes.length;
for (j = 0; j < len1; ++j) {
simpleShape = simpleShapes[j];
shape3d = simpleShape.extrude({
amount: amount,
bevelEnabled: false
});
mesh = new THREE.Mesh(shape3d, material);
mesh.rotation.x = Math.PI;
mesh.translateZ( - amount - 1);
mesh.translateX( - theCenter.x);
mesh.translateY( - theCenter.y);
group.add(mesh);
}
}
};
var init3d = function(){
/// Global : renderer
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setClearColor( 0xb0b0b0 );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
/// Global : scene
scene = new THREE.Scene();
/// Global : camera
camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 1000 );
camera.position.set( 0, 0, 200 );
/// Global : group
group = new THREE.Group();
scene.add( group );
/// direct light
var light = new THREE.DirectionalLight( 0x404040 );
light.position.set( 0.75, 0.75, 1.0 ).normalize();
scene.add( light );
/// ambient light
var ambientLight = new THREE.AmbientLight(0x404040);
scene.add( ambientLight );
/// backgroup grids
var helper = new THREE.GridHelper( 80, 10 );
helper.rotation.x = Math.PI / 2;
group.add( helper );
var obj = initSVGObject();
addGeoObject( group, obj );
};
var initSVGObject = function() {
var obj = {};
/// The geo data from Taipei City, Keelung City, Taipei County in SVG form
obj.paths = [
/// Taipei City
"M366.2182,108.9780 L368.0329,110.3682 L367.5922,112.4411 L369.9258,116.0311 L368.9827,117.3543 " +
"L371.5686,119.8491 L370.5599,121.7206 L372.9314,124.8009 L368.8889,126.7603 L369.2695,130.7622 " +
"L366.1499,130.3388 L363.4698,128.1161 L362.9256,125.6018 L360.8153,126.4025 L360.2968,124.3588 " +
"L361.9519,121.1623 L360.4475,118.7162 L358.1163,117.8678 L358.7094,115.7577 L361.6243,112.4576 Z",
/// Keelung City
"M380.2689,113.3850 L383.5604,114.2370 L383.7404,114.2386 L385.4082,115.6247 L384.9725,117.4631 " +
"L381.6681,117.9439 L383.0209,121.0914 L379.4649,122.7061 L373.4987,118.8487 L372.0980,114.7589 " +
"L377.9716,112.0707 Z",
/// Taipei County
"M359.4486,155.6690 L357.0422,152.7420 L355.1688,148.0173 L357.1186,145.8045 L354.1323,141.2242 " +
"L351.1807,141.6609 L348.9387,140.5372 L349.5415,137.8396 L347.5174,136.1694 L347.6299,129.2327 " +
"L351.4192,128.8067 L354.2518,125.3113 L352.5805,121.8038 L349.3190,120.9429 L344.3277,116.7676 " +
"L350.9772,115.1221 L354.5759,112.5371 L354.5667,110.6949 L357.4098,105.7489 L362.3963,101.8443 " +
"L364.4415,101.0819 L364.5314,101.0828 L364.6209,101.1230 L364.7698,101.2029 L368.1221,101.5115 " +
"L371.7216,104.1338 L372.2958,106.7261 L375.5949,109.6971 L377.0415,108.8875 L377.0737,108.6526 " +
"L377.4037,108.6165 L376.8840,109.7091 L376.7323,109.9037 L377.9416,112.0705 L371.7970,114.8736 " +
"L374.0935,119.4031 L380.7848,122.7963 L382.6529,121.9897 L381.5792,117.8256 L385.0339,117.3069 " +
"L385.4082,115.6247 L388.7014,116.3969 L389.8697,116.6024 L390.0206,116.4860 L391.0396,116.6118 " +
"L394.6665,116.9929 L394.4694,119.2255 L394.3172,119.4987 L395.3792,121.8977 L395.2728,124.0526 " +
"L397.2123,125.6350 L401.1709,126.2516 L401.2612,126.2130 L401.4086,126.6060 L400.1992,127.7733 " +
"L399.7769,128.0446 L399.6247,128.3179 L398.1779,129.0521 L394.2418,129.2969 L388.7324,130.9385 " +
"L389.2782,134.0003 L383.7237,137.0111 L381.7445,139.9336 L379.7001,139.9546 L376.1539,143.0580 " +
"L371.3022,144.1094 L368.6009,146.5914 L368.7361,151.1399 L363.6153,154.4980 " +
/// Taipei County hole.
"M363.4600,128.3904 L366.6300,130.3829 L369.3732,129.3913 L369.5603,125.6695 L374.3989,125.1677 " +
"L370.8412,123.6440 L371.0684,118.8252 L369.0431,117.3157 L369.6882,115.7936 L367.8578,112.8749 " +
"L368.1217,110.4867 L366.5152,109.2554 L361.9554,112.3435 L358.1163,117.8678 L361.7218,120.2192 " +
"L360.7261,126.3232 L362.8064,125.5221 Z"];
obj.amounts = [ 19, 20, 21 ];
obj.colors = [ 0xC07000, 0xC08000, 0xC0A000 ];
obj.center = { x:365, y:125 };
return obj;
};
</script>
<script>
/// Events from extrude shapes example
function onWindowResize() {
windowHalfX = window.innerWidth / 2;
windowHalfY = window.innerHeight / 2;
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
};
function onDocumentMouseDown( event ) {
event.preventDefault();
document.addEventListener( 'mousemove', onDocumentMouseMove, false );
document.addEventListener( 'mouseup', onDocumentMouseUp, false );
document.addEventListener( 'mouseout', onDocumentMouseOut, false );
mouseXOnMouseDown = event.clientX - windowHalfX;
targetRotationOnMouseDown = targetRotation;
};
function onDocumentMouseMove( event ) {
mouseX = event.clientX - windowHalfX;
targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.02;
};
function onDocumentMouseUp( event ) {
document.removeEventListener( 'mousemove', onDocumentMouseMove, false );
document.removeEventListener( 'mouseup', onDocumentMouseUp, false );
document.removeEventListener( 'mouseout', onDocumentMouseOut, false );
};
function onDocumentMouseOut( event ) {
document.removeEventListener( 'mousemove', onDocumentMouseMove, false );
document.removeEventListener( 'mouseup', onDocumentMouseUp, false );
document.removeEventListener( 'mouseout', onDocumentMouseOut, false );
};
function onDocumentTouchStart( event ) {
if ( event.touches.length == 1 ) {
event.preventDefault();
mouseXOnMouseDown = event.touches[ 0 ].pageX - windowHalfX;
targetRotationOnMouseDown = targetRotation;
}
};
function onDocumentTouchMove( event ) {
if ( event.touches.length == 1 ) {
event.preventDefault();
mouseX = event.touches[ 0 ].pageX - windowHalfX;
targetRotation = targetRotationOnMouseDown + ( mouseX - mouseXOnMouseDown ) * 0.05;
}
};
function animate() {
/// compatibility : http://caniuse.com/requestanimationframe
requestAnimationFrame( animate );
render();
stats.update();
};
function render() {
group.rotation.y += ( targetRotation - group.rotation.y ) * 0.05;
renderer.render( scene, camera );
};
</script>
<script>
/// Main
var renderer, stats;
var scene, camera, group;
var targetRotation = 0;
var targetRotationOnMouseDown = 0;
var mouseX = 0;
var mouseXOnMouseDown = 0;
var windowHalfX = window.innerWidth / 2;
var windowHalfY = window.innerHeight / 2;
var container = document.createElement( 'div' );
document.body.appendChild( container );
var info = document.createElement( 'div' );
info.style.position = 'absolute';
info.style.top = '10px';
info.style.width = '100%';
info.style.textAlign = 'center';
info.innerHTML = 'Shapes Extrusion via Geo Data<br/>Drag to spin';
container.appendChild( info );
init3d();
container.appendChild( renderer.domElement );
stats = new Stats();
stats.domElement.style.position = 'absolute';
stats.domElement.style.top = '0px';
container.appendChild( stats.domElement );
document.addEventListener( 'mousedown', onDocumentMouseDown, false );
document.addEventListener( 'touchstart', onDocumentTouchStart, false );
document.addEventListener( 'touchmove', onDocumentTouchMove, false );
window.addEventListener( 'resize', onWindowResize, false );
animate();
</script>
</body>
</html>