100 lines
3.2 KiB
JavaScript
100 lines
3.2 KiB
JavaScript
import { __extends } from "tslib";
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import Path from '../Path.js';
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import * as vec2 from '../../core/vector.js';
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import { quadraticSubdivide, cubicSubdivide, quadraticAt, cubicAt, quadraticDerivativeAt, cubicDerivativeAt } from '../../core/curve.js';
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var out = [];
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var BezierCurveShape = (function () {
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function BezierCurveShape() {
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this.x1 = 0;
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this.y1 = 0;
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this.x2 = 0;
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this.y2 = 0;
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this.cpx1 = 0;
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this.cpy1 = 0;
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this.percent = 1;
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}
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return BezierCurveShape;
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}());
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export { BezierCurveShape };
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function someVectorAt(shape, t, isTangent) {
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var cpx2 = shape.cpx2;
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var cpy2 = shape.cpy2;
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if (cpx2 != null || cpy2 != null) {
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return [
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(isTangent ? cubicDerivativeAt : cubicAt)(shape.x1, shape.cpx1, shape.cpx2, shape.x2, t),
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(isTangent ? cubicDerivativeAt : cubicAt)(shape.y1, shape.cpy1, shape.cpy2, shape.y2, t)
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];
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}
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else {
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return [
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(isTangent ? quadraticDerivativeAt : quadraticAt)(shape.x1, shape.cpx1, shape.x2, t),
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(isTangent ? quadraticDerivativeAt : quadraticAt)(shape.y1, shape.cpy1, shape.y2, t)
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];
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}
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}
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var BezierCurve = (function (_super) {
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__extends(BezierCurve, _super);
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function BezierCurve(opts) {
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return _super.call(this, opts) || this;
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}
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BezierCurve.prototype.getDefaultStyle = function () {
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return {
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stroke: '#000',
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fill: null
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};
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};
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BezierCurve.prototype.getDefaultShape = function () {
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return new BezierCurveShape();
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};
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BezierCurve.prototype.buildPath = function (ctx, shape) {
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var x1 = shape.x1;
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var y1 = shape.y1;
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var x2 = shape.x2;
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var y2 = shape.y2;
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var cpx1 = shape.cpx1;
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var cpy1 = shape.cpy1;
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var cpx2 = shape.cpx2;
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var cpy2 = shape.cpy2;
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var percent = shape.percent;
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if (percent === 0) {
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return;
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}
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ctx.moveTo(x1, y1);
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if (cpx2 == null || cpy2 == null) {
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if (percent < 1) {
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quadraticSubdivide(x1, cpx1, x2, percent, out);
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cpx1 = out[1];
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x2 = out[2];
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quadraticSubdivide(y1, cpy1, y2, percent, out);
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cpy1 = out[1];
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y2 = out[2];
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}
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ctx.quadraticCurveTo(cpx1, cpy1, x2, y2);
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}
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else {
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if (percent < 1) {
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cubicSubdivide(x1, cpx1, cpx2, x2, percent, out);
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cpx1 = out[1];
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cpx2 = out[2];
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x2 = out[3];
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cubicSubdivide(y1, cpy1, cpy2, y2, percent, out);
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cpy1 = out[1];
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cpy2 = out[2];
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y2 = out[3];
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}
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ctx.bezierCurveTo(cpx1, cpy1, cpx2, cpy2, x2, y2);
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}
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};
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BezierCurve.prototype.pointAt = function (t) {
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return someVectorAt(this.shape, t, false);
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};
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BezierCurve.prototype.tangentAt = function (t) {
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var p = someVectorAt(this.shape, t, true);
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return vec2.normalize(p, p);
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};
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return BezierCurve;
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}(Path));
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;
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BezierCurve.prototype.type = 'bezier-curve';
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export default BezierCurve;
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