bd028579
 易尊强
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import { __extends } from "tslib";
import Path from '../Path.js';
import * as vec2 from '../../core/vector.js';
import { quadraticSubdivide, cubicSubdivide, quadraticAt, cubicAt, quadraticDerivativeAt, cubicDerivativeAt } from '../../core/curve.js';
var out = [];
var BezierCurveShape = (function () {
function BezierCurveShape() {
this.x1 = 0;
this.y1 = 0;
this.x2 = 0;
this.y2 = 0;
this.cpx1 = 0;
this.cpy1 = 0;
this.percent = 1;
}
return BezierCurveShape;
}());
export { BezierCurveShape };
function someVectorAt(shape, t, isTangent) {
var cpx2 = shape.cpx2;
var cpy2 = shape.cpy2;
if (cpx2 != null || cpy2 != null) {
return [
(isTangent ? cubicDerivativeAt : cubicAt)(shape.x1, shape.cpx1, shape.cpx2, shape.x2, t),
(isTangent ? cubicDerivativeAt : cubicAt)(shape.y1, shape.cpy1, shape.cpy2, shape.y2, t)
];
}
else {
return [
(isTangent ? quadraticDerivativeAt : quadraticAt)(shape.x1, shape.cpx1, shape.x2, t),
(isTangent ? quadraticDerivativeAt : quadraticAt)(shape.y1, shape.cpy1, shape.y2, t)
];
}
}
var BezierCurve = (function (_super) {
__extends(BezierCurve, _super);
function BezierCurve(opts) {
return _super.call(this, opts) || this;
}
BezierCurve.prototype.getDefaultStyle = function () {
return {
stroke: '#000',
fill: null
};
};
BezierCurve.prototype.getDefaultShape = function () {
return new BezierCurveShape();
};
BezierCurve.prototype.buildPath = function (ctx, shape) {
var x1 = shape.x1;
var y1 = shape.y1;
var x2 = shape.x2;
var y2 = shape.y2;
var cpx1 = shape.cpx1;
var cpy1 = shape.cpy1;
var cpx2 = shape.cpx2;
var cpy2 = shape.cpy2;
var percent = shape.percent;
if (percent === 0) {
return;
}
ctx.moveTo(x1, y1);
if (cpx2 == null || cpy2 == null) {
if (percent < 1) {
quadraticSubdivide(x1, cpx1, x2, percent, out);
cpx1 = out[1];
x2 = out[2];
quadraticSubdivide(y1, cpy1, y2, percent, out);
cpy1 = out[1];
y2 = out[2];
}
ctx.quadraticCurveTo(cpx1, cpy1, x2, y2);
}
else {
if (percent < 1) {
cubicSubdivide(x1, cpx1, cpx2, x2, percent, out);
cpx1 = out[1];
cpx2 = out[2];
x2 = out[3];
cubicSubdivide(y1, cpy1, cpy2, y2, percent, out);
cpy1 = out[1];
cpy2 = out[2];
y2 = out[3];
}
ctx.bezierCurveTo(cpx1, cpy1, cpx2, cpy2, x2, y2);
}
};
BezierCurve.prototype.pointAt = function (t) {
return someVectorAt(this.shape, t, false);
};
BezierCurve.prototype.tangentAt = function (t) {
var p = someVectorAt(this.shape, t, true);
return vec2.normalize(p, p);
};
return BezierCurve;
}(Path));
;
BezierCurve.prototype.type = 'bezier-curve';
export default BezierCurve;
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