bd028579
 易尊强
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/**
* 圆环
*/
import Path, { PathProps } from '../Path';
export class RingShape {
cx = 0
cy = 0
r = 0
r0 = 0
}
export interface RingProps extends PathProps {
shape?: Partial<RingShape>
}
class Ring extends Path<RingProps> {
shape: RingShape
constructor(opts?: RingProps) {
super(opts);
}
getDefaultShape() {
return new RingShape();
}
buildPath(ctx: CanvasRenderingContext2D, shape: RingShape) {
const x = shape.cx;
const y = shape.cy;
const PI2 = Math.PI * 2;
ctx.moveTo(x + shape.r, y);
ctx.arc(x, y, shape.r, 0, PI2, false);
ctx.moveTo(x + shape.r0, y);
ctx.arc(x, y, shape.r0, 0, PI2, true);
}
}
Ring.prototype.type = 'ring';
export default Ring;
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