ItaPoly
矩形库上的GLSL片段着色对于分形，过滤器，raymarch等的经验有用。
用法
<!DOCTYPE html >
< html >
< head >
< meta charset =" UTF-8 " >
< title > </ title >
< style >
</ style >
</ head >
< body >
< script id =" frag " type =" x-shader/x-fragment " >
// Your fragment shader here
# ifdef GL_ES
precision mediump float ;
# endif
uniform float time ;
uniform vec2 resolutio
