【OpenGL】Shader实例分析（八）- 彩色光圈

转发请保持地址：http://blog.youkuaiyun.com/stalendp/article/details/40690185

研究了一个彩色光圈效果，感觉挺不错的，分享给大家，效果如下：

代码如下：

Shader "shadertoy/TotalNoob" {  //https://www.shadertoy.com/view/XdlSDs
	Properties{
		iMouse ("Mouse Pos", Vector) = (100,100,0,0)
		iChannel0("iChannel0", 2D) = "white" {}  
		iChannelResolution0 ("iChannelResolution0", Vector) = (100,100,0,0)
	}
	  
	CGINCLUDE    
	 	#include "UnityCG.cginc"   
  		#pragma target 3.0      
  		#pragma glsl

  		#define vec2 float2
  		#define vec3 float3
  		#define vec4 float4
  		#define mat2 float2x2
  		#define iGlobalTime _Time.y
//  		#define mod fmod  // mod = sign*fmod
  		#define mix lerp
  		#define atan atan2
  		#define fract frac 
  		#define texture