text: /**
   * 玫瑰线
   * @module zrender/graphic/shape/Rose
   */
  define(function (require) {
  
      var sin = Math.sin;
      var cos = Math.cos;
      var radian = Math.PI / 180;
  
      return require('../Path').extend({
  
          type: 'rose',
  
          shape: {
              cx: 0,
              cy: 0,
              r: [],
              k: 0,
              n: 1
          },
  
          style: {
              stroke: '#000',
              fill: null
          },
  
          buildPath: function (ctx, shape) {
              var x;
              var y;
              var R = shape.r;
              var r;
              var k = shape.k;
              var n = shape.n;
  
              var x0 = shape.cx;
              var y0 = shape.cy;
  
              ctx.moveTo(x0, y0);
  
              for (var i = 0, len = R.length; i < len ; i++) {
                  r = R[i];
  
                  for (var 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);
                  }
              }
          }
      });
  });
  