68 lines
1.6 KiB
Text
68 lines
1.6 KiB
Text
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Shader "Hidden/Akvfx/Unproject"
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{
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CGINCLUDE
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#include "UnityCG.cginc"
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texture2D _ColorTexture;
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texture2D _DepthTexture;
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StructuredBuffer<float> _XYTable;
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float _MaxDepth;
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void Vertex(
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float4 position : POSITION,
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out float4 positionOut : SV_Position,
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inout float2 texCoord : TEXCOORD0
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)
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{
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positionOut = UnityObjectToClipPos(position);
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}
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void Fragment(
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float4 position : SV_Position,
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float2 texCoord : TEXCOORD0,
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out float4 colorOut : SV_Target0,
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out float4 positionOut : SV_Target1
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)
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{
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uint w, h;
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_ColorTexture.GetDimensions(w, h);
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// Texture index
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uint tx = texCoord.x * w;
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uint ty = texCoord.y * h;
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// Color sample
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float4 color = _ColorTexture[uint2(tx, ty)];
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// Depth sample (int16 -> float)
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int d0 = _DepthTexture[uint2(tx * 2 + 0, ty)] * 255;
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int d1 = _DepthTexture[uint2(tx * 2 + 1, ty)] * 255;
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float depth = (float)(d0 + (d1 << 8)) / 1000;
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float mask = depth > 0 && depth < _MaxDepth;
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float z = lerp(_MaxDepth, depth, mask);
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// XY table lookup
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uint xy_i = (tx + ty * w) * 2;
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float2 xy = float2(_XYTable[xy_i], -_XYTable[xy_i + 1]);
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// MRT output write
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colorOut = float4(color.rgb, mask);
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positionOut = float4(xy * z, z, mask);
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}
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ENDCG
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SubShader
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{
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Cull Off ZWrite Off ZTest Always
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Pass
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{
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CGPROGRAM
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#pragma vertex Vertex
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#pragma fragment Fragment
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ENDCG
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}
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}
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}
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