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https://github.com/izzy2lost/UnrealEngineUWP.git
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ef2256631b
* reduced order of SH (faster but a bit more blurry) * DirectionalOcclusion (disabled by default, can be enabled in PostProcessSettings, affects SkyLight and ReflectionEnvironments but not AmbientCube) * Material BlockGI feature * Spotlight support * Uses AsyncCompute on XboxOne as optimization (order is not optimized yet) [CL 2553823 by Martin Mittring in Main branch]
100 lines
2.2 KiB
Plaintext
100 lines
2.2 KiB
Plaintext
//-----------------------------------------------------------------------------
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// File: LPVClear.usf
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//
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// Summary: Shader to clear an LPV volume
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//
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// Created: 2013-03-01
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//
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// Author: mailto:benwood@microsoft.com
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//
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// Copyright (C) Microsoft. All rights reserved.
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//-----------------------------------------------------------------------------
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/*------------------------------------------------------------------------------
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Compile time parameters:
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------------------------------------------------------------------------------*/
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#include "Common.usf"
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#include "LPVWriteCommon.usf"
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#include "LPVGeometryVolumeCommon.usf"
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//------------------------------------------------------------------------------
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#define CLEAR_EDGES 0
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//------------------------------------------------------------------------------
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[numthreads(4,4,4)]
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void CSClear(uint3 DTid : SV_DispatchThreadID)
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{
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uint i = GetGridAddress( DTid );
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#if REFINE_OVER_TIME
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int3 idx = DTid;
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int3 scrollVec = int3(LpvWrite.mOldGridOffset) - int3(LpvWrite.mLpvGridOffset);
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idx += scrollVec;
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float maxExtent = MaxGridExtent( (float3)idx );
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float mul = PREV_FRAME_MULTIPLIER;
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idx = clamp( idx, int3(0,0,0), int3(31,31,31) );
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int sourceCell = GetGridAddress( idx );
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LPVCell cell = ReadLpvCell( sourceCell );
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mul *= LpvWrite.ClearMultiplier;
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// corruption detection (workaround for brightlodge lighting corruption)
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{
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if ( isnan( cell.AO ) || isinf( cell.AO ) )
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{
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mul = 0.0f;
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}
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[unroll]
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for ( int i=0; i<9; i++ )
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{
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float df = dot( cell.coeffs[i], float3(1.0f,1.0f,1.0f) );
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if ( isnan( df ) || isinf( df ) )
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{
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mul = 0.0f;
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}
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}
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}
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////@TODO: add a separate shader for this
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[branch]
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if ( mul == 0.0f ) // This is needed in order to fix QNANs
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{
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ClearCell( cell );
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}
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else
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{
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MultiplyCellCoeffs( cell, mul );
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}
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#if CLEAR_EDGES
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if ( maxExtent > 13.5 && false )
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{
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ClearCell( cell );
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cell.AO = 0.5;
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}
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#endif
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WriteLpvCell( cell, i );
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#else // !REFINE_OVER_TIME
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LPVCell cell;
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ClearCell( cell );
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WriteLpvCell( cell, i );
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#endif
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}
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//------------------------------------------------------------------------------
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[numthreads(4,4,4)]
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void CSClearGeometryVolume(uint3 DTid : SV_DispatchThreadID)
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{
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uint i = GetGridAddress( DTid );
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ClearGvCell( i );
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}
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