40 lines
1.1 KiB
TypeScript
40 lines
1.1 KiB
TypeScript
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///<reference path="./Shape.ts" />
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class Polygon extends Shape {
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public points: Vector2[];
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constructor(vertCount: number, radius: number){
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super();
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this.setPoints(Polygon.buildSymmertricalPolygon(vertCount, radius));
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}
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public setPoints(points: Vector2[]){
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this.points = points;
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this.recalculateCenterAndEdgeNormals();
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}
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public recalculateCenterAndEdgeNormals(){
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}
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public static findPolygonCenter(points: Vector2[]){
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let x = 0, y = 0;
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for (let i = 0; i < points.length; i++){
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x += points[i].x;
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y += points[i].y;
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}
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return new Vector2(x / points.length, y / points.length);
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}
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public static buildSymmertricalPolygon(vertCount: number, radius: number){
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let verts = new Vector2[vertCount];
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for (let i = 0; i < vertCount; i ++){
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let a = 2 * Math.PI * (i / vertCount);
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verts[i] = new Vector2(Math.cos(a), Math.sign(a) * radius);
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}
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return verts;
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}
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}
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