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frontend/node_modules/zrender/lib/graphic/shape/BezierCurve.js

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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;