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| var Path = require("../Path");
|
| /**
| * 正多边形
| * @module zrender/shape/Isogon
| */
| var PI = Math.PI;
| var sin = Math.sin;
| var cos = Math.cos;
|
| var _default = Path.extend({
| type: 'isogon',
| shape: {
| x: 0,
| y: 0,
| r: 0,
| n: 0
| },
| buildPath: function (ctx, shape) {
| var n = shape.n;
|
| if (!n || n < 2) {
| return;
| }
|
| var x = shape.x;
| var y = shape.y;
| var r = shape.r;
| var dStep = 2 * PI / n;
| var deg = -PI / 2;
| ctx.moveTo(x + r * cos(deg), y + r * sin(deg));
|
| for (var i = 0, end = n - 1; i < end; i++) {
| deg += dStep;
| ctx.lineTo(x + r * cos(deg), y + r * sin(deg));
| }
|
| ctx.closePath();
| return;
| }
| });
|
| module.exports = _default;
|
|
