# 一花一世界

今天好奇绘制玫瑰花的过程，摘录如下：

<html>
<title>玫瑰花</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<style type="text/css">#wangking {position:absolute; width:100%; height:100%; text-align:center;}</style>
<body>
<div style="text-align:center">
<h1>一花一世界</h1>
</div>
<div id="wangking">
<canvas id="meiGuiImage">
</canvas>
<script>
let canvasTag = document.getElementById('meiGuiImage');
let drawEnv = canvasTag.getContext('2d');
with(m=Math)
C=cos,S=sin,P=pow,R=random;
canvasTag.width=canvasTag.height=f=500;
h=-250;
function printImage(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 < 1) {
if (c > 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+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]
}
}
function drawMeiGui() {
for (i=0; i < 1e4; i++) {
if (s=printImage(R(), R(), i%46/.74)) {
z=s[2];x=~~(s[0]*f/z-h);
y=~~(s[1]*f/z-h);
if (!m[q=y*f+x]|m[q]>z) {
m[q]=z;
drawEnv.fillStyle="rgb("+~(s[3]*h)+","+~(s[4]*h)+","+~(s[3]*s[3]*-80)+")";
drawEnv.fillRect(x,y,1,1);
}
}
}
}
setInterval('drawMeiGui()', 0)
</script>
</div>
</body>
</html>

posted @ 2021-01-06 22:51  晒太阳的兔子很忙  阅读(163)  评论(0编辑  收藏  举报