Arc.js
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/**
* 圆弧
* @module zrender/graphic/shape/Arc
*/
import Path from '../Path';
export default Path.extend({
type: 'arc',
shape: {
cx: 0,
cy: 0,
r: 0,
startAngle: 0,
endAngle: Math.PI * 2,
clockwise: true
},
style: {
stroke: '#000',
fill: null
},
buildPath: function (ctx, shape) {
var x = shape.cx;
var y = shape.cy;
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 * r + x, unitY * r + y);
ctx.arc(x, y, r, startAngle, endAngle, !clockwise);
}
});