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85 行
1.6 KiB
85 行
1.6 KiB
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Shader "Hidden/SSAA" {
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Properties {
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_MainTex ("Base (RGB)", 2D) = "white" {}
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}
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// very simple & fast AA by Emmanuel Julien
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SubShader {
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Pass {
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ZTest Always Cull Off ZWrite Off
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#include "UnityCG.cginc"
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uniform sampler2D _MainTex;
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uniform float4 _MainTex_TexelSize;
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struct v2f {
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float4 pos : SV_POSITION;
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float2 uv[5] : TEXCOORD0;
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};
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v2f vert( appdata_img v ) {
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v2f o;
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o.pos = mul (UNITY_MATRIX_MVP, v.vertex);
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float2 uv = v.texcoord.xy;
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float w = 1.75;
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float2 up = float2(0.0, _MainTex_TexelSize.y) * w;
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float2 right = float2(_MainTex_TexelSize.x, 0.0) * w;
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o.uv[0].xy = uv - up;
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o.uv[1].xy = uv - right;
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o.uv[2].xy = uv + right;
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o.uv[3].xy = uv + up;
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o.uv[4].xy = uv;
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return o;
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}
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half4 frag (v2f i) : SV_Target
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{
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half4 outColor;
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float t = Luminance( tex2D( _MainTex, i.uv[0] ).xyz );
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float l = Luminance( tex2D( _MainTex, i.uv[1] ).xyz);
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float r = Luminance( tex2D( _MainTex, i.uv[2] ).xyz);
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float b = Luminance( tex2D( _MainTex, i.uv[3] ).xyz);
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half2 n = half2( -( t - b ), r - l );
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float nl = length( n );
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if ( nl < (1.0 / 16.0) )
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outColor = tex2D( _MainTex, i.uv[4] );
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else {
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n *= _MainTex_TexelSize.xy / nl;
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half4 o = tex2D( _MainTex, i.uv[4]);
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half4 t0 = tex2D( _MainTex, i.uv[4] + n * 0.5) * 0.9;
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half4 t1 = tex2D( _MainTex, i.uv[4] - n * 0.5) * 0.9;
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half4 t2 = tex2D( _MainTex, i.uv[4] + n) * 0.75;
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half4 t3 = tex2D( _MainTex, i.uv[4] - n) * 0.75;
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outColor = (o + t0 + t1 + t2 + t3) / 4.3;
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}
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return outColor;
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}
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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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