@visactor/vrender-core/es/common/segment/curve/curve-context.js

```typescript import { xxx } from '@visactor/vrender-core'; ```

import { Point } from "@visactor/vutils";

import { LineCurve } from "./line";

import { CubicBezierCurve } from "./cubic-bezier";

import { QuadraticBezierCurve } from "./quadratic-bezier";

export class CurveContext {
    constructor(path) {
        this.path = path, this._lastX = this._lastY = this._startX = this._startY = 0;
    }
    moveTo(x, y) {
        return this._lastX = this._startX = x, this._lastY = this._startY = y, this;
    }
    lineTo(x, y) {
        const curve = this.addLinearCurve(x, y);
        this.path.addCurve(curve), this._lastX = x, this._lastY = y;
    }
    addLinearCurve(x, y) {
        return new LineCurve(new Point(this._lastX, this._lastY), new Point(x, y));
    }
    quadraticCurveTo(aCPx, aCPy, aX, aY) {
        const curve = new QuadraticBezierCurve(new Point(this._lastX, this._lastY), new Point(aCPx, aCPy), new Point(aX, aY));
        this.path.addCurve(curve), this._lastX = aX, this._lastY = aY;
    }
    bezierCurveTo(cp1x, cp1y, cp2x, cp2y, x, y) {
        const curve = new CubicBezierCurve(new Point(this._lastX, this._lastY), new Point(cp1x, cp1y), new Point(cp2x, cp2y), new Point(x, y));
        this.path.addCurve(curve), this._lastX = x, this._lastY = y;
    }
    arcTo(aX1, aY1, aX2, aY2, aRadius) {
        throw new Error("CurveContext不支持调用arcTo");
    }
    ellipse(aX, aY, xRadius, yRadius, aRotation, aStartAngle, aEndAngle, aClockwise) {
        throw new Error("CurveContext不支持调用ellipse");
    }
    rect(x, y, w, h) {
        throw new Error("CurveContext不支持调用rect");
    }
    arc(x, y, radius, startAngle, endAngle, counterclockwise) {
        throw new Error("CurveContext不支持调用arc");
    }
    closePath() {
        this.path.curves.length < 2 || this.lineTo(this._startX, this._startY);
    }
}
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