84 lines
1.6 KiB
JavaScript
84 lines
1.6 KiB
JavaScript
var Polyline = function(x,y) {
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var className = "Polyline";
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var points = [new Point(x,y)];
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function translate(x,y) {
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for (var i = 0; i < points.length; i++) {
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points[i].x += x;
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points[i].y += y;
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}
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}
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function rotate(degrees) {
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console.log('rotate: to be implemented')
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}
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function scale(scale) {
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for (var i = 0; i < points.length; i++) {
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points[i].x *= scale;
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points[i].y *= scale;
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}
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}
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function addVertex(x,y) {
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var p = new Point(x,y);
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points.push(p);
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}
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function getBoundingBox() {
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var box = new Rectangle(0,0,0,0);
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for (var i=0; i<points.length; i++) {
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if (i==0) box.set(points[i].x,points[i].y,0,0);
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else box.growToIncludePoint(points[i]);
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}
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return box;
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}
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function getWidth() {
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return getBoundingBox().getWidth();
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}
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function getHeight() {
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return getBoundingBox().getHeight();
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}
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function getPoints() {
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return points;
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}
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function getPerimeter() {
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var len = 0;
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for (var i = 1; i < points.length; i++) {
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len += points[i-1].distance(points[i]);
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}
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return len;
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}
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function clone() {
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var p = new Polyline(points[0].x,points[0].y);
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for (var i=1; i<points.length; i++) {
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p.getPoints().push(new Point(points[i].x, points[i].y));
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}
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return p;
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}
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function toString() {
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return points.join(", ");
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}
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return {
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translate: translate,
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rotate: rotate,
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scale: scale,
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addVertex: addVertex,
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getBoundingBox: getBoundingBox,
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getPerimeter: getPerimeter,
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getWidth: getWidth,
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getHeight: getHeight,
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getPoints: getPoints,
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clone: clone,
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toString: toString,
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}
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} |