63 lines
1.2 KiB
JavaScript
63 lines
1.2 KiB
JavaScript
"use strict";
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class Point {
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constructor(type, x, y) {
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this.type = type;
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this.x = x;
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this.y = y;
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}
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get on() {
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throw new Error("Unreachable");
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}
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get cubic() {
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throw new Error("Unreachable");
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}
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add(z2) {
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return this.addScale(1, z2);
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}
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addScale(scale, z2) {
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return new Point(this.type, this.x + scale * z2.x, this.y + scale * z2.y);
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}
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mix(scale, z2) {
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return new Point(
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this.type,
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this.x + scale * (z2.x - this.x),
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this.y + scale * (z2.y - this.y)
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);
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}
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scale(t) {
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return new Point(this.type, t * this.x, t * this.y);
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}
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round(d) {
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return new Point(this.type, Math.round(d * this.x) / d, Math.round(d * this.y) / d);
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}
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static from(type, z) {
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return new Point(type, z.x || 0, z.y || 0);
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}
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static fromXY(type, x, y) {
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return new Point(type, x || 0, y || 0);
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}
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static transformed(tfm, z) {
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return Point.transformedXY(tfm, z.type, z.x, z.y);
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}
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static transformedXY(tfm, type, x, y) {
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return new Point(
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type,
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x * tfm.xx + y * tfm.yx + tfm.x || 0,
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x * tfm.xy + y * tfm.yy + tfm.y || 0
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);
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}
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static translated(z, dx, dy) {
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return new Point(z.type, z.x + dx || 0, z.y + dy || 0);
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}
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}
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Point.Type = {
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Corner: 0,
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CubicStart: 1,
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CubicEnd: 2,
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Quadratic: 3
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};
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module.exports = Point;
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