bd028579
 易尊强
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import { __extends } from "tslib";
import Path from '../Path.js';
var PI = Math.PI;
var cos = Math.cos;
var sin = Math.sin;
var StarShape = (function () {
function StarShape() {
this.cx = 0;
this.cy = 0;
this.n = 3;
this.r = 0;
}
return StarShape;
}());
export { StarShape };
var Star = (function (_super) {
__extends(Star, _super);
function Star(opts) {
return _super.call(this, opts) || this;
}
Star.prototype.getDefaultShape = function () {
return new StarShape();
};
Star.prototype.buildPath = function (ctx, shape) {
var n = shape.n;
if (!n || n < 2) {
return;
}
var x = shape.cx;
var y = shape.cy;
var r = shape.r;
var r0 = shape.r0;
if (r0 == null) {
r0 = n > 4
? r * cos(2 * PI / n) / cos(PI / n)
: r / 3;
}
var dStep = PI / n;
var deg = -PI / 2;
var xStart = x + r * cos(deg);
var yStart = y + r * sin(deg);
deg += dStep;
ctx.moveTo(xStart, yStart);
for (var i = 0, end = n * 2 - 1, ri = void 0; i < end; i++) {
ri = i % 2 === 0 ? r0 : r;
ctx.lineTo(x + ri * cos(deg), y + ri * sin(deg));
deg += dStep;
}
ctx.closePath();
};
return Star;
}(Path));
Star.prototype.type = 'star';
export default Star;
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