bd028579
 易尊强
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/**
* 玫瑰线
* @module zrender/graphic/shape/Rose
*/
import Path, { PathProps } from '../Path';
const sin = Math.sin;
const cos = Math.cos;
const radian = Math.PI / 180;
export class RoseShape {
cx = 0
cy = 0
r: number[] = []
k = 0
n = 1
}
export interface RoseProps extends PathProps {
shape?: Partial<RoseShape>
}
class Rose extends Path<RoseProps> {
shape: RoseShape
constructor(opts?: RoseProps) {
super(opts);
}
getDefaultStyle() {
return {
stroke: '#000',
fill: null as string
};
}
getDefaultShape() {
return new RoseShape();
}
buildPath(ctx: CanvasRenderingContext2D, shape: RoseShape) {
const R = shape.r;
const k = shape.k;
const n = shape.n;
const x0 = shape.cx;
const y0 = shape.cy;
let x;
let y;
let r;
ctx.moveTo(x0, y0);
for (let i = 0, len = R.length; i < len; i++) {
r = R[i];
for (let j = 0; j <= 360 * n; j++) {
x = r
* sin(k / n * j % 360 * radian)
* cos(j * radian)
+ x0;
y = r
* sin(k / n * j % 360 * radian)
* sin(j * radian)
+ y0;
ctx.lineTo(x, y);
}
}
}
}
Rose.prototype.type = 'rose';
export default Rose;
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