38 lines
967 B
JavaScript
38 lines
967 B
JavaScript
var Point = function(x,y) {
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if (x===undefined) x = 0;
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if (y===undefined) y = 0;
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if (isNaN(x) || isNaN(y)) {
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console.warning("Point x or y isNaN: ",x,y);
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}
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this.x = x;
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this.y = y;
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}
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// Point.prototype.clone = function() { //not used since it easy to clone a point using 'new Point(org.x,org.y)'
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// return new Point(this.x, this.y);
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// }
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Point.prototype.distance = function(p) {
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var x1 = this.x;
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var y1 = this.y;
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var x2 = p.x;
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var y2 = p.y;
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return Math.sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
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}
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Point.prototype.rotate = function(radians,pivot) {
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if (pivot===undefined) pivot = new Point(0,0);
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var x = this.x;
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var y = this.y;
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var xrot = ((x-pivot.x)*Math.cos(radians) - (y-pivot.y)*Math.sin(radians)) + pivot.x;
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this.y = ((x-pivot.x)*Math.sin(radians) + (y-pivot.y)*Math.cos(radians)) + pivot.y;
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this.x = xrot;
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}
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Point.prototype.toString = function(p) {
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return this.x.toFixed(2) + "," + this.y.toFixed(2);
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}
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