39 lines
816 B
JavaScript
39 lines
816 B
JavaScript
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// Homogeneous2D.js
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// John Breaux 2022-07-01
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// 2D Homogeneous coordinate library
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"use strict"
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//
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// Classes
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//
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// Homogeneous2D: Stores a 2d vector or point in homogeneous coords
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class Homogeneous2D {
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constructor(x = 0, y = 0, w = 0) {
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this.x = x;
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this.y = y;
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this.w = w;
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}
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// Add with modify
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add_m(rhs) {
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if (rhs) {
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this.x += rhs.x;
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this.y += rhs.y;
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this.w += rhs.w;
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return this;
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}
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else return null;
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}
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// copy
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copy() {
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return new Homogeneous2D(this.x, this.y, this.w);
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}
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// create vector/point from 2d polar coordinates
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from_polar(r = 0, theta = 0, w = 0) {
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this.x = r * Math.cos(theta + Math.PI / 2);
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this.y = r * Math.sin(theta + Math.PI / 2);
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this.w = w;
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return this;
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}
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}
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