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import smoothBezier from './smoothBezier';
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import { VectorArray } from '../../core/vector';
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import PathProxy from '../../core/PathProxy';
|
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export function buildPath(
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ctx: CanvasRenderingContext2D | PathProxy,
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shape: {
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points: VectorArray[],
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smooth?: number
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smoothConstraint?: VectorArray[]
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},
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closePath: boolean
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) {
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const smooth = shape.smooth;
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let points = shape.points;
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if (points && points.length >= 2) {
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if (smooth) {
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const controlPoints = smoothBezier(
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points, smooth, closePath, shape.smoothConstraint
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);
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ctx.moveTo(points[0][0], points[0][1]);
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const len = points.length;
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for (let i = 0; i < (closePath ? len : len - 1); i++) {
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const cp1 = controlPoints[i * 2];
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const cp2 = controlPoints[i * 2 + 1];
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const p = points[(i + 1) % len];
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ctx.bezierCurveTo(
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cp1[0], cp1[1], cp2[0], cp2[1], p[0], p[1]
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);
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}
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}
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else {
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ctx.moveTo(points[0][0], points[0][1]);
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for (let i = 1, l = points.length; i < l; i++) {
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ctx.lineTo(points[i][0], points[i][1]);
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}
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}
|
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closePath && ctx.closePath();
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}
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}
|
