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Viewing file:     Rose.js (1.08 KB)      -rw-r--r--

/**
 * 玫瑰线
 * @module zrender/graphic/shape/Rose
 */

import Path from '../Path';

var sin = Math.sin;
var cos = Math.cos;
var radian = Math.PI / 180;

export default 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);
            }
        }
    }
});