36 lines
1.6 KiB
JavaScript
36 lines
1.6 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.isBezierCurve = exports.BezierCurve = void 0;
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var vector_1 = require("./vector");
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var lerp = function (a, b, t) {
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return new vector_1.Vector(a.x + (b.x - a.x) * t, a.y + (b.y - a.y) * t);
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};
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var BezierCurve = /** @class */ (function () {
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function BezierCurve(start, startControl, endControl, end) {
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this.type = 1 /* BEZIER_CURVE */;
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this.start = start;
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this.startControl = startControl;
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this.endControl = endControl;
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this.end = end;
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}
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BezierCurve.prototype.subdivide = function (t, firstHalf) {
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var ab = lerp(this.start, this.startControl, t);
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var bc = lerp(this.startControl, this.endControl, t);
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var cd = lerp(this.endControl, this.end, t);
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var abbc = lerp(ab, bc, t);
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var bccd = lerp(bc, cd, t);
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var dest = lerp(abbc, bccd, t);
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return firstHalf ? new BezierCurve(this.start, ab, abbc, dest) : new BezierCurve(dest, bccd, cd, this.end);
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};
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BezierCurve.prototype.add = function (deltaX, deltaY) {
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return new BezierCurve(this.start.add(deltaX, deltaY), this.startControl.add(deltaX, deltaY), this.endControl.add(deltaX, deltaY), this.end.add(deltaX, deltaY));
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};
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BezierCurve.prototype.reverse = function () {
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return new BezierCurve(this.end, this.endControl, this.startControl, this.start);
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};
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return BezierCurve;
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}());
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exports.BezierCurve = BezierCurve;
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var isBezierCurve = function (path) { return path.type === 1 /* BEZIER_CURVE */; };
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exports.isBezierCurve = isBezierCurve;
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//# sourceMappingURL=bezier-curve.js.map
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