mirror of https://bitbucket.org/CPMADevs/cnq3
72 lines
2.1 KiB
HLSL
72 lines
2.1 KiB
HLSL
/*
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===========================================================================
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Copyright (C) 2024 Gian 'myT' Schellenbaum
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This file is part of Challenge Quake 3 (CNQ3).
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Challenge Quake 3 is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Challenge Quake 3 is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Challenge Quake 3. If not, see <https://www.gnu.org/licenses/>.
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===========================================================================
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*/
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// volumetric lighting: temporal reprojection
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#include "common.hlsli"
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#include "scene_view.h.hlsli"
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#if defined(TYPE_FLOAT4)
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typedef float4 Type;
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#elif defined(TYPE_FLOAT)
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typedef float Type;
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#else
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#pragma message "define TYPE_FLOAT4 or TYPE_FLOAT"
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#endif
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cbuffer RootConstants
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{
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uint currTextureIndex;
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uint prevTextureIndex;
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uint prevTextureSamplerIndex;
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float alpha;
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}
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[numthreads(4, 4, 4)]
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void cs(uint3 id : SV_DispatchThreadID)
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{
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RWTexture3D<Type> currTexture = ResourceDescriptorHeap[currTextureIndex];
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uint3 textureSize = GetTextureSize(currTexture);
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if(any(id >= textureSize))
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{
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return;
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}
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SceneView scene = GetSceneView();
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Texture3D<Type> prevTexture = ResourceDescriptorHeap[prevTextureIndex];
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SamplerState prevTextureSampler = SamplerDescriptorHeap[prevTextureSamplerIndex];
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float3 tc = scene.FroxelReproject01(id, float3(textureSize));
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Type currValue = currTexture[id];
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float3 halfPixelSize = float3(0.5, 0.5, 0.5) / float3(textureSize);
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if(IsInRange(tc, halfPixelSize, float3(1, 1, 1) - halfPixelSize))
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{
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Type prevValue = prevTexture.SampleLevel(prevTextureSampler, tc, 0);
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Type finalValue = lerp(currValue, prevValue, alpha);
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if(any(finalValue != currValue))
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{
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currTexture[id] = finalValue;
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}
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}
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}
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