Sector.js
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/**
* 扇形
* @module zrender/graphic/shape/Sector
*/
import Path from '../Path';
import fixClipWithShadow from '../helper/fixClipWithShadow';
export default Path.extend({
type: 'sector',
shape: {
cx: 0,
cy: 0,
r0: 0,
r: 0,
startAngle: 0,
endAngle: Math.PI * 2,
clockwise: true
},
brush: fixClipWithShadow(Path.prototype.brush),
buildPath: function (ctx, shape) {
var x = shape.cx;
var y = shape.cy;
var r0 = Math.max(shape.r0 || 0, 0);
var r = Math.max(shape.r, 0);
var startAngle = shape.startAngle;
var endAngle = shape.endAngle;
var clockwise = shape.clockwise;
var unitX = Math.cos(startAngle);
var unitY = Math.sin(startAngle);
ctx.moveTo(unitX * r0 + x, unitY * r0 + y);
ctx.lineTo(unitX * r + x, unitY * r + y);
ctx.arc(x, y, r, startAngle, endAngle, !clockwise);
ctx.lineTo(
Math.cos(endAngle) * r0 + x,
Math.sin(endAngle) * r0 + y
);
if (r0 !== 0) {
ctx.arc(x, y, r0, endAngle, startAngle, clockwise);
}
ctx.closePath();
}
});