forked from zhurui/management
37 lines
1.0 KiB
JavaScript
37 lines
1.0 KiB
JavaScript
var smoothSpline = require("./smoothSpline");
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var smoothBezier = require("./smoothBezier");
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function buildPath(ctx, shape, closePath) {
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var points = shape.points;
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var smooth = shape.smooth;
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if (points && points.length >= 2) {
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if (smooth && smooth !== 'spline') {
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var controlPoints = smoothBezier(points, smooth, closePath, shape.smoothConstraint);
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ctx.moveTo(points[0][0], points[0][1]);
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var len = points.length;
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for (var i = 0; i < (closePath ? len : len - 1); i++) {
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var cp1 = controlPoints[i * 2];
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var cp2 = controlPoints[i * 2 + 1];
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var p = points[(i + 1) % len];
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ctx.bezierCurveTo(cp1[0], cp1[1], cp2[0], cp2[1], p[0], p[1]);
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}
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} else {
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if (smooth === 'spline') {
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points = smoothSpline(points, closePath);
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}
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ctx.moveTo(points[0][0], points[0][1]);
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for (var 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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}
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exports.buildPath = buildPath; |