58 lines
1.6 KiB
Plaintext
58 lines
1.6 KiB
Plaintext
Shader "Hidden/OIT/WBOITBlend"
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{
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SubShader
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{
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ZTest Always Cull Back ZWrite Off Fog { Mode Off }
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Pass
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{
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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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struct v2f
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{
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float2 uv : TEXCOORD0;
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float4 vertex : SV_POSITION;
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};
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sampler2D _CameraColorTex;
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sampler2D _AccumTex;
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sampler2D _RevealageTex;
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v2f vert (uint vertexID: SV_VertexID)
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{
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v2f o;
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float2 uv = float2((vertexID << 1) & 2, vertexID & 2);
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// 如果 ZWrite Off，在 gl 下 CCW 逆时针环绕，dx 默认 CW 顺时针环绕，需要 uv.xy = uv.yx;
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float4 pos = float4(uv * 2.0 - 1.0, UNITY_NEAR_CLIP_VALUE, 1.0);
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#ifdef UNITY_PRETRANSFORM_TO_DISPLAY_ORIENTATION
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pos = ApplyPretransformRotation(pos);
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#endif
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#if UNITY_UV_STARTS_AT_TOP
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uv = float2((vertexID << 1) & 2, 1.0 - (vertexID & 2));
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#endif
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o.vertex = pos;
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o.uv = uv;
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return o;
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}
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fixed4 frag (v2f i) : SV_Target
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{
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fixed4 background = tex2D(_CameraColorTex, i.uv);
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float4 accum = tex2D(_AccumTex, i.uv);
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float r = tex2D(_RevealageTex, i.uv).r;
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fixed4 col = float4(accum.rgb / clamp(accum.a, 1e-4, 5e4), r);
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return (1.0 - col.a) * col + col.a * background;
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}
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ENDCG
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}
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}
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}
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