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38 lines
1.3 KiB
38 lines
1.3 KiB
#ifndef UNITY_PATH_TRACING_AOV_INCLUDED
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#define UNITY_PATH_TRACING_AOV_INCLUDED
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#include "Packages/com.unity.render-pipelines.high-definition/Runtime/RenderPipeline/PathTracing/Shaders/PathTracingPayload.hlsl"
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struct AOVData
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{
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float3 albedo;
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float3 normal;
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};
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bool NeedAOVData(PathPayload payload)
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{
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return payload.segmentID == 0 && IsOutputFlagOn(payload, OUTPUT_FLAG_AOV);
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}
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void WriteAOVData(AOVData aovData, float3 positionWS, inout PathPayload payload)
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{
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// Check if we have anything to write to the payload
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if (!NeedAOVData(payload))
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return;
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// Compute motion vector (from pixel coordinates and world position passed as inputs)
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float3 positionOS = TransformWorldToObject(positionWS);
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float4 prevPosWS = mul(GetPrevObjectToWorldMatrix(), float4(positionOS, 1.0));
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float4 prevClipPos = mul(UNITY_MATRIX_PREV_VP, prevPosWS);
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prevClipPos.xy /= prevClipPos.w;
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prevClipPos.y = -prevClipPos.y;
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float2 viewportSize = _ScreenSize.xy;
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float2 prevPixelCoord = (prevClipPos.xy * 0.5 + 0.5) * viewportSize;
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// Write final AOV values to the payload
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payload.aovMotionVector -= prevPixelCoord;
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payload.aovAlbedo = aovData.albedo;
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payload.aovNormal = aovData.normal;
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}
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#endif //UNITY_PATH_TRACING_AOV_INCLUDED
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