79 lines
2.0 KiB
Plaintext
79 lines
2.0 KiB
Plaintext
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Shader "PostEffect/RadialBlurShader"
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{
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Properties
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{
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_MainTex ("Texture", 2D) = "white" {}
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_IterationNumber("IterationNumber", Int) = 16
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_Intensity("Intensity", float) = 0.1
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_OffsetX("OffsetX", float) = 0.5
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_OffsetY("OffsetY", float) = 0.5
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}
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CGINCLUDE
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uniform sampler2D _MainTex;
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uniform float _Intensity;
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uniform float _OffsetX;
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uniform float _OffsetY;
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uniform int _IterationNumber;
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//uniform float _BlurFactor; //模糊强度（0-0.05）
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//uniform float4 _BlurCenter; //模糊中心点xy值（0-1）屏幕空间
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#include "UnityCG.cginc"
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//#define SAMPLE_COUNT 16 //迭代次数
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fixed4 frag(v2f_img i) : SV_Target
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{
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////模糊方向为模糊中点指向边缘（当前像素点），而越边缘该值越大，越模糊
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//float2 dir = i.uv - _BlurCenter.xy;
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//float4 outColor = 0;
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////采样SAMPLE_COUNT次
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//for (int j = 0; j < SAMPLE_COUNT; ++j)
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//{
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// //计算采样uv值：正常uv值+从中间向边缘逐渐增加的采样距离
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// float2 uv = i.uv - _BlurFactor * dir * j;
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// outColor += tex2D(_MainTex, uv);
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//}
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////取平均值
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//outColor /= SAMPLE_COUNT;
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//return outColor;
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float2 center = float2(_OffsetX, _OffsetY);
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float2 uv = i.uv;
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uv -= center;
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float4 color = float4(0.0, 0.0, 0.0, 0.0);
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_Intensity *= 0.085;
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float scale = 1;
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for (int j = 1; j < _IterationNumber; ++j)
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{
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color += tex2D(_MainTex, uv * scale + center);
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scale = 1 + (float(j * _Intensity));
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}
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color /= (float)_IterationNumber;
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return color;
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}
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ENDCG
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SubShader
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{
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Pass
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{
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ZTest Always
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Cull Off
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ZWrite Off
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Fog{ Mode off }
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//调用CG函数
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CGPROGRAM
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//使效率更高的编译宏
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#pragma fragmentoption ARB_precision_hint_fastest
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//vert_img是在UnityCG.cginc中定义好的，当后处理vert阶段计算常规，可以直接使用自带的vert_img
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#pragma vertex vert_img
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#pragma fragment frag
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ENDCG
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}
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}
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Fallback off
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}
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