META-INF.assets.rjzjh.zrender.graphic.shape.Sector.js Maven / Gradle / Ivy
/**
* 扇形
* @module zrender/graphic/shape/Sector
*/
// FIXME clockwise seems wrong
define(function (require) {
return require('../Path').extend({
type: 'sector',
shape: {
cx: 0,
cy: 0,
r0: 0,
r: 0,
startAngle: 0,
endAngle: Math.PI * 2,
clockwise: true
},
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();
}
});
});