bd028579
 易尊强
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/**
* 水滴形状
*/
import Path, { PathProps } from '../Path';
export class DropletShape {
cx = 0
cy = 0
width = 0
height = 0
}
export interface DropletProps extends PathProps {
shape?: Partial<DropletShape>
}
class Droplet extends Path<DropletProps> {
shape: DropletShape
constructor(opts?: DropletProps) {
super(opts);
}
getDefaultShape() {
return new DropletShape();
}
buildPath(ctx: CanvasRenderingContext2D, shape: DropletShape) {
const x = shape.cx;
const y = shape.cy;
const a = shape.width;
const b = shape.height;
ctx.moveTo(x, y + a);
ctx.bezierCurveTo(
x + a,
y + a,
x + a * 3 / 2,
y - a / 3,
x,
y - b
);
ctx.bezierCurveTo(
x - a * 3 / 2,
y - a / 3,
x - a,
y + a,
x,
y + a
);
ctx.closePath();
}
}
Droplet.prototype.type = 'droplet';
export default Droplet;
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