HTML5中canvas如何绘制的玫瑰花效果

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代码如下:

var b = document.body;
var c = document.getElementsByTagName(‘canvas’)[0];
var a = c.getContext(‘2d’);
document.body.clientWidth;

// start of submission //
with (m = Math) C = cos, S = sin, P = pow, R = random; c.width = c.height = f = 500; h = -250; function p(a, b, c) { if (c > 60) return [S(a * 7) * (13 + 5 / (.2 + P(b * 4, 4))) – S(b) * 50, b * f + 50, 625 + C(a * 7) * (13 + 5 / (.2 + P(b * 4, 4))) + b * 400, a * 1 – b / 2, a]; A = a * 2 – 1; B = b * 2 – 1; if (A * A + B * B 37) { n = (j = c & 1) ? 6 : 4; o = .5 / (a + .01) + C(b * 125) * 3 – a * 300; w = b * h; return [o * C(n) + w * S(n) + j * 610 – 390, o * S(n) – w * C(n) + 550 – j * 350, 1180 + C(B + A) * 99 – j * 300, .4 – a * .1 + P(1 – B * B, -h * 6) * .15 – a * b * .4 + 免费云主机域名C(a + b) / 5 + P(C((o * (a + 1) + (B > 0 ? w : -w)) / 25), 30) * .1 * (1 – B * B), o / 1e3 + .7 – o * w * 3e-6] } if (c > 32) { c = c * 1.16 – .15; o = a * 45 – 20; w = b * b * h; z = o * S(c) + w * C(c) + 620; return [o * C(c) – w * S(c), 28 + C(B * .5) * 99 – b * b * b * 60 – z / 2 – h, z, (b * b * .3 + P((1 – (A * A)), 7) * .15 + .3) * b, b * .7] } o = A * (2 – b) * (80 – c * 2); w = 99 – C(A) * 120 – C(b) * (-h – c * 4.9) + C(P(1 – b, 7)) * 50 + c * 2; z = o * S(c) + w * C(c) + 700; return [o * C(c) – w * S(c), B * 99 – C(P(b, 7)) * 50 – c / 3 – z / 1.35 + 450, z, (1 – b / 1.2) * .9 + a * .1, P((1 – b), 20) / 4 + .05] } } setInterval(‘for(i=0;iz)m[q]=z,a.fillStyle=”rgb(“+~(s[3]*h)+”,”+~(s[4]*h)+”,”+~(s[3]*s[3]*-80)+”)”,a.fillRect(x,y,1,1)}’, 0)
// end of submission //

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