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CloudsController.cpp
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CloudsController.cpp
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/////////////////////////////////////////////////////////////////////////////////////////////
// Copyright 2017 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or imlied.
// See the License for the specific language governing permissions and
// limitations under the License.
/////////////////////////////////////////////////////////////////////////////////////////////
#include "StdAfx.h"
#include "CloudsController.h"
#include "Structures.fxh"
#include "Visibility.h"
#include "ShaderMacroHelper.h"
#include "IGFXExtensionsHelper.h"
// This helper template function traverses the 3D cloud lattice
template<typename CProc>
void TraverseCloudLattice(const UINT iNumRings,
const UINT iInnerRingDim,
const UINT iRingExtension,
const UINT iNumLayers,
CProc Proc)
{
UINT iRingDimension = iInnerRingDim + 2*iRingExtension;
assert( (iInnerRingDim % 4) == 0 );
for(int iRing = iNumRings-1; iRing >= 0; --iRing)
{
for(UINT iRow = 0; iRow < iRingDimension; ++iRow)
{
UINT iFirstQuart = iRingExtension + iInnerRingDim*1/4;
UINT iThirdQuart = iRingExtension + iInnerRingDim*3/4;
UINT iStartCol[2] = {0, iThirdQuart };
UINT iEndCol[2] = {iFirstQuart, iRingDimension};
if( !(iRing > 0 && iRow >= iFirstQuart && iRow < iThirdQuart) )
iStartCol[1] = iEndCol[0];
for(int i=0; i < _countof(iStartCol); ++i)
for(UINT iCol = iStartCol[i]; iCol < iEndCol[i]; ++iCol)
for(UINT iLayer = 0; iLayer < iNumLayers; ++iLayer)
Proc(iCol, iRow, iRing, iLayer);
}
}
}
CCloudsController::CCloudsController() :
m_strEffectPath(L"fx\\Clouds.fx"),
m_strPreprocessingEffectPath(L"fx\\Preprocessing.fx"),
m_uiCloudDensityTexWidth(1024),
m_uiCloudDensityTexHeight(1024),
m_bPSOrderingAvailable(false),
m_f3PrevLightDir(0,0,0)
{
}
CCloudsController::~CCloudsController()
{
}
void RenderQuad(ID3D11DeviceContext *pd3dDeviceCtx,
CRenderTechnique &State,
int iWidth = 0, int iHeight = 0,
int iTopLeftX = 0, int iTopLeftY = 0,
int iNumInstances = 1);
// This method handles resize event
void CCloudsController::OnResize(ID3D11Device *pDevice,
UINT uiWidth, UINT uiHeight)
{
m_uiBackBufferWidth = uiWidth;
m_uiBackBufferHeight = uiHeight;
UINT uiDownscaledWidth = m_uiBackBufferWidth /m_CloudAttribs.uiDownscaleFactor;
UINT uiDownscaledHeight = m_uiBackBufferHeight/m_CloudAttribs.uiDownscaleFactor;
m_CloudAttribs.uiBackBufferWidth = m_uiBackBufferWidth;
m_CloudAttribs.uiBackBufferHeight = m_uiBackBufferHeight;
m_CloudAttribs.uiDownscaledBackBufferWidth = uiDownscaledWidth;
m_CloudAttribs.uiDownscaledBackBufferHeight = uiDownscaledHeight;
m_CloudAttribs.fBackBufferWidth = (float)m_uiBackBufferWidth;
m_CloudAttribs.fBackBufferHeight = (float)m_uiBackBufferHeight;
m_CloudAttribs.fDownscaledBackBufferWidth = (float)uiDownscaledWidth;
m_CloudAttribs.fDownscaledBackBufferHeight = (float)uiDownscaledHeight;
// Release existing resources
m_ptex2DScreenCloudColorSRV.Release();
m_ptex2DScreenCloudColorRTV.Release();
m_ptex2DScrSpaceCloudTransparencySRV.Release();
m_ptex2DScrSpaceCloudTransparencyRTV.Release();
m_ptex2DScrSpaceDistToCloudSRV.Release();
m_ptex2DScrSpaceDistToCloudRTV.Release();
m_ptex2DDownscaledScrCloudColorSRV.Release();
m_ptex2DDownscaledScrCloudColorRTV.Release();
m_ptex2DDownscaledScrCloudTransparencySRV.Release();
m_ptex2DDownscaledScrCloudTransparencyRTV.Release();
m_ptex2DDownscaledScrDistToCloudSRV.Release();
m_ptex2DDownscaledScrDistToCloudRTV.Release();
m_pbufParticleLayersSRV.Release();
m_pbufParticleLayersUAV.Release();
m_pbufClearParticleLayers.Release();
// Create screen space cloud color buffer
D3D11_TEXTURE2D_DESC ScreenCloudColorTexDesc =
{
m_uiBackBufferWidth, //UINT Width;
m_uiBackBufferHeight, //UINT Height;
1, //UINT MipLevels;
1, //UINT ArraySize;
DXGI_FORMAT_R11G11B10_FLOAT, //DXGI_FORMAT Format;
{1,0}, //DXGI_SAMPLE_DESC SampleDesc;
D3D11_USAGE_DEFAULT, //D3D11_USAGE Usage;
D3D11_BIND_RENDER_TARGET | D3D11_BIND_SHADER_RESOURCE, //UINT BindFlags;
0, //UINT CPUAccessFlags;
0, //UINT MiscFlags;
};
HRESULT hr;
CComPtr<ID3D11Texture2D> ptex2DScreenCloudColor;
V( pDevice->CreateTexture2D(&ScreenCloudColorTexDesc, nullptr, &ptex2DScreenCloudColor) );
V( pDevice->CreateShaderResourceView(ptex2DScreenCloudColor, nullptr, &m_ptex2DScreenCloudColorSRV) );
V( pDevice->CreateRenderTargetView(ptex2DScreenCloudColor, nullptr, &m_ptex2DScreenCloudColorRTV) );
if( m_CloudAttribs.uiDownscaleFactor > 1 )
{
// Create downscaled screen space cloud color buffer
D3D11_TEXTURE2D_DESC DownscaledScreenCloudColorTexDesc = ScreenCloudColorTexDesc;
DownscaledScreenCloudColorTexDesc.Width /= m_CloudAttribs.uiDownscaleFactor;
DownscaledScreenCloudColorTexDesc.Height /= m_CloudAttribs.uiDownscaleFactor;
CComPtr<ID3D11Texture2D> ptex2DDownscaledScrCloudColor;
V( pDevice->CreateTexture2D(&DownscaledScreenCloudColorTexDesc, nullptr, &ptex2DDownscaledScrCloudColor) );
V( pDevice->CreateShaderResourceView(ptex2DDownscaledScrCloudColor, nullptr, &m_ptex2DDownscaledScrCloudColorSRV) );
V( pDevice->CreateRenderTargetView(ptex2DDownscaledScrCloudColor, nullptr, &m_ptex2DDownscaledScrCloudColorRTV) );
}
{
// Create screen space cloud transparency buffer
D3D11_TEXTURE2D_DESC ScreenTransparencyTexDesc = ScreenCloudColorTexDesc;
ScreenTransparencyTexDesc.Format = DXGI_FORMAT_R8_UNORM;
CComPtr<ID3D11Texture2D> ptex2DScreenTransparency;
V( pDevice->CreateTexture2D(&ScreenTransparencyTexDesc, nullptr, &ptex2DScreenTransparency) );
V( pDevice->CreateShaderResourceView(ptex2DScreenTransparency, nullptr, &m_ptex2DScrSpaceCloudTransparencySRV) );
V( pDevice->CreateRenderTargetView(ptex2DScreenTransparency, nullptr, &m_ptex2DScrSpaceCloudTransparencyRTV) );
if( m_CloudAttribs.uiDownscaleFactor > 1 )
{
// Create downscaled screen space cloud transparency buffer
ScreenTransparencyTexDesc.Width /= m_CloudAttribs.uiDownscaleFactor;
ScreenTransparencyTexDesc.Height /= m_CloudAttribs.uiDownscaleFactor;
CComPtr<ID3D11Texture2D> ptex2DDownscaledScrTransparency;
V( pDevice->CreateTexture2D(&ScreenTransparencyTexDesc, nullptr, &ptex2DDownscaledScrTransparency) );
V( pDevice->CreateShaderResourceView(ptex2DDownscaledScrTransparency, nullptr, &m_ptex2DDownscaledScrCloudTransparencySRV) );
V( pDevice->CreateRenderTargetView(ptex2DDownscaledScrTransparency, nullptr, &m_ptex2DDownscaledScrCloudTransparencyRTV) );
}
}
{
// Create screen space distance to cloud buffer
D3D11_TEXTURE2D_DESC ScreenDistToCloudTexDesc = ScreenCloudColorTexDesc;
ScreenDistToCloudTexDesc.Format = DXGI_FORMAT_R32_FLOAT; // We need only the closest distance to camera
CComPtr<ID3D11Texture2D> ptex2DScrSpaceDistToCloud;
V( pDevice->CreateTexture2D(&ScreenDistToCloudTexDesc, nullptr, &ptex2DScrSpaceDistToCloud) );
V( pDevice->CreateShaderResourceView(ptex2DScrSpaceDistToCloud, nullptr, &m_ptex2DScrSpaceDistToCloudSRV) );
V( pDevice->CreateRenderTargetView(ptex2DScrSpaceDistToCloud, nullptr, &m_ptex2DScrSpaceDistToCloudRTV) );
if( m_CloudAttribs.uiDownscaleFactor > 1 )
{
// Create downscaled screen space distance to cloud buffer
ScreenDistToCloudTexDesc.Width /= m_CloudAttribs.uiDownscaleFactor;
ScreenDistToCloudTexDesc.Height /= m_CloudAttribs.uiDownscaleFactor;
CComPtr<ID3D11Texture2D> ptex2DDownscaledScrDistToCloud;
V( pDevice->CreateTexture2D(&ScreenDistToCloudTexDesc, nullptr, &ptex2DDownscaledScrDistToCloud) );
V( pDevice->CreateShaderResourceView(ptex2DDownscaledScrDistToCloud, nullptr, &m_ptex2DDownscaledScrDistToCloudSRV) );
V( pDevice->CreateRenderTargetView(ptex2DDownscaledScrDistToCloud, nullptr, &m_ptex2DDownscaledScrDistToCloudRTV) );
}
}
if( m_bPSOrderingAvailable )
{
int iNumElements = (m_uiBackBufferWidth / m_CloudAttribs.uiDownscaleFactor) *
(m_uiBackBufferHeight / m_CloudAttribs.uiDownscaleFactor) *
m_CloudAttribs.uiNumParticleLayers;
D3D11_BUFFER_DESC ParticleLayersBufDesc =
{
iNumElements * sizeof(SParticleLayer), //UINT ByteWidth;
D3D11_USAGE_DEFAULT, //D3D11_USAGE Usage;
D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_UNORDERED_ACCESS, //UINT BindFlags;
0, //UINT CPUAccessFlags;
D3D11_RESOURCE_MISC_BUFFER_STRUCTURED, //UINT MiscFlags;
sizeof(SParticleLayer) //UINT StructureByteStride;
};
CComPtr<ID3D11Buffer> pbufParticleLayers;
V(pDevice->CreateBuffer( &ParticleLayersBufDesc, nullptr, &pbufParticleLayers));
D3D11_SHADER_RESOURCE_VIEW_DESC SRVDesc;
ZeroMemory(&SRVDesc, sizeof(SRVDesc));
SRVDesc.Format = DXGI_FORMAT_UNKNOWN;
SRVDesc.ViewDimension = D3D11_SRV_DIMENSION_BUFFER;
SRVDesc.Buffer.FirstElement = 0;
SRVDesc.Buffer.NumElements = iNumElements;
V(pDevice->CreateShaderResourceView( pbufParticleLayers, &SRVDesc, &m_pbufParticleLayersSRV));
D3D11_UNORDERED_ACCESS_VIEW_DESC UAVDesc;
UAVDesc.Format = DXGI_FORMAT_UNKNOWN;
UAVDesc.ViewDimension = D3D11_UAV_DIMENSION_BUFFER;
UAVDesc.Buffer.FirstElement = 0;
UAVDesc.Buffer.NumElements = iNumElements;
UAVDesc.Buffer.Flags = 0;
V(pDevice->CreateUnorderedAccessView( pbufParticleLayers, &UAVDesc, &m_pbufParticleLayersUAV));
std::vector<SParticleLayer> ClearLayers(iNumElements);
ParticleLayersBufDesc.Usage = D3D11_USAGE_IMMUTABLE;
ParticleLayersBufDesc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
D3D11_SUBRESOURCE_DATA InitData = {&ClearLayers[0],0,0};
V(pDevice->CreateBuffer( &ParticleLayersBufDesc, &InitData, &m_pbufClearParticleLayers));
}
}
// This method renders maximum density mip map
void CCloudsController::RenderMaxDensityMip( ID3D11Device *pDevice,
ID3D11DeviceContext *pDeviceContext,
ID3D11Texture2D *ptex2DMaxDensityMipMap,
ID3D11Texture2D *ptex2DTmpMaxDensityMipMap,
const D3D11_TEXTURE2D_DESC &MaxCloudDensityMipDesc )
{
HRESULT hr;
CD3DShaderMacroHelper Macros;
DefineMacros(Macros);
Macros.Finalize();
// Create techniques
CRenderTechnique RenderMaxDensityLevel0Tech;
RenderMaxDensityLevel0Tech.SetDeviceAndContext(pDevice, pDeviceContext);
RenderMaxDensityLevel0Tech.CreateVGPShadersFromFile(m_strEffectPath, "ScreenSizeQuadVS", nullptr, "RenderMaxMipLevel0PS", Macros);
RenderMaxDensityLevel0Tech.SetDS( m_pdsDisableDepth );
RenderMaxDensityLevel0Tech.SetRS( m_prsSolidFillNoCull );
RenderMaxDensityLevel0Tech.SetBS( m_pbsDefault );
CRenderTechnique RenderCoarseMaxMipLevelTech;
RenderCoarseMaxMipLevelTech.SetDeviceAndContext(pDevice, pDeviceContext);
RenderCoarseMaxMipLevelTech.CreateVGPShadersFromFile(m_strEffectPath, "ScreenSizeQuadVS", nullptr, "RenderCoarseMaxMipLevelPS", Macros);
RenderCoarseMaxMipLevelTech.SetDS( m_pdsDisableDepth );
RenderCoarseMaxMipLevelTech.SetRS( m_prsSolidFillNoCull );
RenderCoarseMaxMipLevelTech.SetBS( m_pbsDefault );
CComPtr<ID3D11RenderTargetView> pOrigRTV;
CComPtr<ID3D11DepthStencilView> pOrigDSV;
pDeviceContext->OMGetRenderTargets(1, &pOrigRTV, &pOrigDSV);
D3D11_VIEWPORT OrigViewPort;
UINT iNumOldViewports = 1;
pDeviceContext->RSGetViewports(&iNumOldViewports, &OrigViewPort);
UINT uiCurrMipWidth = MaxCloudDensityMipDesc.Width;
UINT uiCurrMipHeight = MaxCloudDensityMipDesc.Height;
for(UINT uiMip = 0; uiMip < MaxCloudDensityMipDesc.MipLevels; ++uiMip)
{
D3D11_RENDER_TARGET_VIEW_DESC RTVDesc;
RTVDesc.Format = MaxCloudDensityMipDesc.Format;
RTVDesc.ViewDimension = D3D11_RTV_DIMENSION_TEXTURE2D;
RTVDesc.Texture2D.MipSlice = uiMip;
CComPtr<ID3D11RenderTargetView> ptex2DTmpMaxDensityMipMapRTV;
V(pDevice->CreateRenderTargetView(ptex2DTmpMaxDensityMipMap, &RTVDesc, &ptex2DTmpMaxDensityMipMapRTV));
pDeviceContext->OMSetRenderTargets(1, &ptex2DTmpMaxDensityMipMapRTV.p, nullptr);
ID3D11SamplerState *pSamplers[] = {m_psamPointWrap};
pDeviceContext->PSSetSamplers(2, _countof(pSamplers), pSamplers);
m_CloudAttribs.f4Parameter.x = (float)uiMip;
UpdateConstantBuffer(pDeviceContext, m_pcbGlobalCloudAttribs, &m_CloudAttribs, sizeof(m_CloudAttribs));
ID3D11Buffer *pCBs[] = {m_pcbGlobalCloudAttribs};
pDeviceContext->PSSetConstantBuffers(0, _countof(pCBs), pCBs);
if(uiMip == 0)
{
ID3D11ShaderResourceView *pSRVs[] = {m_ptex2DCloudDensitySRV};
pDeviceContext->PSSetShaderResources(1, _countof(pSRVs), pSRVs);
}
else
{
ID3D11ShaderResourceView *pSRVs[] = {m_ptex2DMaxDensityMipMapSRV};
pDeviceContext->PSSetShaderResources(3, _countof(pSRVs), pSRVs);
}
RenderQuad(pDeviceContext, uiMip == 0 ? RenderMaxDensityLevel0Tech : RenderCoarseMaxMipLevelTech, uiCurrMipWidth, uiCurrMipHeight);
pDeviceContext->CopySubresourceRegion(ptex2DMaxDensityMipMap, uiMip, 0,0,0, ptex2DTmpMaxDensityMipMap, uiMip, nullptr);
uiCurrMipWidth /= 2;
uiCurrMipHeight /= 2;
}
assert( uiCurrMipWidth == 0 && uiCurrMipHeight == 0 );
pDeviceContext->OMSetRenderTargets(1, &pOrigRTV.p, pOrigDSV);
pDeviceContext->RSSetViewports(iNumOldViewports, &OrigViewPort);
}
// Auxiliary method which creates a buffer and views
HRESULT CCloudsController::CreateBufferAndViews(ID3D11Device *pDevice,
const D3D11_BUFFER_DESC &BuffDesc,
D3D11_SUBRESOURCE_DATA *pInitData,
ID3D11Buffer**ppBuffer,
ID3D11ShaderResourceView **ppSRV,
ID3D11UnorderedAccessView **ppUAV,
UINT UAVFlags /*= 0*/)
{
HRESULT hr;
CComPtr< ID3D11Buffer > ptmpBuffer;
if( ppBuffer == nullptr )
ppBuffer = &ptmpBuffer;
V_RETURN(pDevice->CreateBuffer( &BuffDesc, pInitData, ppBuffer));
if( ppSRV )
{
assert( BuffDesc.MiscFlags & D3D11_RESOURCE_MISC_BUFFER_STRUCTURED );
D3D11_SHADER_RESOURCE_VIEW_DESC SRVDesc;
ZeroMemory(&SRVDesc, sizeof(SRVDesc));
SRVDesc.Format = DXGI_FORMAT_UNKNOWN;
SRVDesc.ViewDimension = D3D11_SRV_DIMENSION_BUFFER;
SRVDesc.Buffer.FirstElement = 0;
SRVDesc.Buffer.NumElements = BuffDesc.ByteWidth / BuffDesc.StructureByteStride;
V_RETURN(pDevice->CreateShaderResourceView( *ppBuffer, &SRVDesc, ppSRV));
}
if( ppUAV )
{
assert( BuffDesc.MiscFlags & D3D11_RESOURCE_MISC_BUFFER_STRUCTURED );
D3D11_UNORDERED_ACCESS_VIEW_DESC UAVDesc;
UAVDesc.Format = DXGI_FORMAT_UNKNOWN;
UAVDesc.ViewDimension = D3D11_UAV_DIMENSION_BUFFER;
UAVDesc.Buffer.FirstElement = 0;
UAVDesc.Buffer.NumElements = BuffDesc.ByteWidth / BuffDesc.StructureByteStride;
UAVDesc.Buffer.Flags = UAVFlags;
V_RETURN(pDevice->CreateUnorderedAccessView( *ppBuffer, &UAVDesc, ppUAV));
}
return S_OK;
}
// Method crates particle buffers
HRESULT CCloudsController::CreateParticleDataBuffer(ID3D11Device *pDevice)
{
m_CloudAttribs.uiRingDimension = m_CloudAttribs.uiInnerRingDim + m_CloudAttribs.uiRingExtension*2;
// Populate cell locations array
m_PackedCellLocations.clear();
m_PackedCellLocations.reserve(m_CloudAttribs.uiRingDimension * m_CloudAttribs.uiRingDimension * m_CloudAttribs.uiNumRings);
TraverseCloudLattice(m_CloudAttribs.uiNumRings, m_CloudAttribs.uiInnerRingDim, m_CloudAttribs.uiRingExtension, 1,
[&](UINT i, UINT j, UINT ring, UINT layer)
{
m_PackedCellLocations.push_back( PackParticleIJRing(i,j,ring, layer) );
}
);
m_CloudAttribs.uiNumCells = (UINT)m_PackedCellLocations.size();
// Populate particle locations array
m_PackedParticleLocations.clear();
m_PackedParticleLocations.reserve(m_CloudAttribs.uiNumCells * m_CloudAttribs.uiMaxLayers);
TraverseCloudLattice(m_CloudAttribs.uiNumRings, m_CloudAttribs.uiInnerRingDim, m_CloudAttribs.uiRingExtension, m_CloudAttribs.uiMaxLayers,
[&](UINT i, UINT j, UINT ring, UINT layer)
{
m_PackedParticleLocations.push_back( PackParticleIJRing(i,j,ring, layer) );
}
);
m_CloudAttribs.uiMaxParticles = (UINT)m_PackedParticleLocations.size();
HRESULT hr;
// Create cloud cell attributes buffer
{
D3D11_BUFFER_DESC CloudGridBuffDesc =
{
m_CloudAttribs.uiNumCells * sizeof(SCloudCellAttribs), //UINT ByteWidth;
D3D11_USAGE_DEFAULT, //D3D11_USAGE Usage;
D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_UNORDERED_ACCESS, //UINT BindFlags;
0, //UINT CPUAccessFlags;
D3D11_RESOURCE_MISC_BUFFER_STRUCTURED, //UINT MiscFlags;
sizeof(SCloudCellAttribs) //UINT StructureByteStride;
};
m_pbufCloudGridSRV.Release();
m_pbufCloudGridUAV.Release();
V( CreateBufferAndViews( pDevice, CloudGridBuffDesc, nullptr, nullptr, &m_pbufCloudGridSRV, &m_pbufCloudGridUAV ) );
}
// Create particle attributes buffer
{
D3D11_BUFFER_DESC ParticleBuffDesc =
{
m_CloudAttribs.uiMaxParticles * sizeof(SParticleAttribs), //UINT ByteWidth;
D3D11_USAGE_DEFAULT, //D3D11_USAGE Usage;
D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_UNORDERED_ACCESS, //UINT BindFlags;
0, //UINT CPUAccessFlags;
D3D11_RESOURCE_MISC_BUFFER_STRUCTURED, //UINT MiscFlags;
sizeof(SParticleAttribs) //UINT StructureByteStride;
};
m_pbufCloudParticlesSRV.Release();
m_pbufCloudParticlesUAV.Release();
V( CreateBufferAndViews( pDevice, ParticleBuffDesc, nullptr, nullptr, &m_pbufCloudParticlesSRV, &m_pbufCloudParticlesUAV ) );
}
// Create buffer for storing particle lighting info
{
D3D11_BUFFER_DESC LightingBuffDesc =
{
m_CloudAttribs.uiMaxParticles * sizeof(SCloudParticleLighting), //UINT ByteWidth;
D3D11_USAGE_DEFAULT, //D3D11_USAGE Usage;
D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_UNORDERED_ACCESS, //UINT BindFlags;
0, //UINT CPUAccessFlags;
D3D11_RESOURCE_MISC_BUFFER_STRUCTURED, //UINT MiscFlags;
sizeof(SCloudParticleLighting) //UINT StructureByteStride;
};
m_pbufParticlesLightingSRV.Release();
m_pbufParticlesLightingUAV.Release();
V( CreateBufferAndViews( pDevice, LightingBuffDesc, nullptr, nullptr, &m_pbufParticlesLightingSRV, &m_pbufParticlesLightingUAV) );
}
// Create buffer for storing cell locations
{
D3D11_BUFFER_DESC PackedCellLocationsBuffDesc =
{
m_CloudAttribs.uiNumCells * sizeof(UINT), //UINT ByteWidth;
D3D11_USAGE_IMMUTABLE, //D3D11_USAGE Usage;
D3D11_BIND_SHADER_RESOURCE, //UINT BindFlags;
0, //UINT CPUAccessFlags;
D3D11_RESOURCE_MISC_BUFFER_STRUCTURED, //UINT MiscFlags;
sizeof(UINT) //UINT StructureByteStride;
};
m_pbufPackedCellLocationsSRV.Release();
D3D11_SUBRESOURCE_DATA InitData = {&m_PackedCellLocations[0], 0, 0};
CreateBufferAndViews( pDevice, PackedCellLocationsBuffDesc, &InitData, nullptr, &m_pbufPackedCellLocationsSRV, nullptr);
}
// Create buffer for storing unordered list of valid cell
{
D3D11_BUFFER_DESC ValidCellsBuffDesc =
{
m_CloudAttribs.uiNumCells * sizeof(UINT),//UINT ByteWidth;
D3D11_USAGE_DEFAULT, //D3D11_USAGE Usage;
D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_UNORDERED_ACCESS, //UINT BindFlags;
0, //UINT CPUAccessFlags;
D3D11_RESOURCE_MISC_BUFFER_STRUCTURED, //UINT MiscFlags;
sizeof(UINT) //UINT StructureByteStride;
};
m_pbufValidCellsUnorderedList.Release();
m_pbufValidCellsUnorderedListSRV.Release();
m_pbufValidCellsUnorderedListUAV.Release();
V( CreateBufferAndViews( pDevice, ValidCellsBuffDesc, nullptr, &m_pbufValidCellsUnorderedList, &m_pbufValidCellsUnorderedListSRV, &m_pbufValidCellsUnorderedListUAV, D3D11_BUFFER_UAV_FLAG_APPEND) );
m_pbufVisibleCellsUnorderedListSRV.Release();
m_pbufVisibleCellsUnorderedListUAV.Release();
V( CreateBufferAndViews( pDevice, ValidCellsBuffDesc, nullptr, nullptr, &m_pbufVisibleCellsUnorderedListSRV, &m_pbufVisibleCellsUnorderedListUAV, D3D11_BUFFER_UAV_FLAG_APPEND) );
}
{
D3D11_BUFFER_DESC VisibleParticlesBuffDesc =
{
m_CloudAttribs.uiMaxParticles * sizeof(SParticleIdAndDist), //UINT ByteWidth;
D3D11_USAGE_DEFAULT, //D3D11_USAGE Usage;
D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_UNORDERED_ACCESS, //UINT BindFlags;
0, //UINT CPUAccessFlags;
D3D11_RESOURCE_MISC_BUFFER_STRUCTURED, //UINT MiscFlags;
sizeof(SParticleIdAndDist) //UINT StructureByteStride;
};
m_pbufVisibleParticlesUnorderedListSRV.Release();
m_pbufVisibleParticlesUnorderedListUAV.Release();
V(CreateBufferAndViews(pDevice, VisibleParticlesBuffDesc, nullptr, nullptr, &m_pbufVisibleParticlesUnorderedListSRV, &m_pbufVisibleParticlesUnorderedListUAV, D3D11_BUFFER_UAV_FLAG_APPEND));
m_pbufVisibleParticlesSortedListSRV.Release();
m_pbufVisibleParticlesSortedListUAV.Release();
V(CreateBufferAndViews(pDevice, VisibleParticlesBuffDesc, nullptr, nullptr, &m_pbufVisibleParticlesSortedListSRV, &m_pbufVisibleParticlesSortedListUAV));
m_pbufVisibleParticlesMergedListSRV.Release();
m_pbufVisibleParticlesMergedListUAV.Release();
V(CreateBufferAndViews(pDevice, VisibleParticlesBuffDesc, nullptr, nullptr, &m_pbufVisibleParticlesMergedListSRV, &m_pbufVisibleParticlesMergedListUAV));
}
// Create buffer for storing streamed out list of visible particles
{
D3D11_BUFFER_DESC SerializedParticlesBuffDesc =
{
m_CloudAttribs.uiMaxParticles * sizeof(UINT), //UINT ByteWidth;
D3D11_USAGE_DEFAULT, //D3D11_USAGE Usage;
D3D11_BIND_UNORDERED_ACCESS | D3D11_BIND_VERTEX_BUFFER, //UINT BindFlags;
0, //UINT CPUAccessFlags;
0, //UINT MiscFlags;
0 //UINT StructureByteStride;
};
m_pbufSerializedVisibleParticles.Release();
m_pbufSerializedVisibleParticlesUAV.Release();
V(pDevice->CreateBuffer( &SerializedParticlesBuffDesc, nullptr, &m_pbufSerializedVisibleParticles));
D3D11_UNORDERED_ACCESS_VIEW_DESC UAVDesc;
UAVDesc.Format = DXGI_FORMAT_R32_UINT;
UAVDesc.ViewDimension = D3D11_UAV_DIMENSION_BUFFER;
UAVDesc.Buffer.FirstElement = 0;
UAVDesc.Buffer.NumElements = SerializedParticlesBuffDesc.ByteWidth / sizeof(UINT);
UAVDesc.Buffer.Flags = 0;
V(pDevice->CreateUnorderedAccessView( m_pbufSerializedVisibleParticles, &UAVDesc, &m_pbufSerializedVisibleParticlesUAV));
}
{
m_ptex3DCellDensitySRV.Release();
m_ptex3DCellDensityUAV.Release();
m_ptex3DLightAttenuatingMassSRV.Release();
m_ptex3DLightAttenuatingMassUAV.Release();
D3D11_TEXTURE3D_DESC Tex3DDesc =
{
m_CloudAttribs.uiRingDimension * m_CloudAttribs.uiDensityBufferScale, //UINT Width;
m_CloudAttribs.uiRingDimension * m_CloudAttribs.uiDensityBufferScale, //UINT Height;
m_CloudAttribs.uiMaxLayers * m_CloudAttribs.uiDensityBufferScale * m_CloudAttribs.uiNumRings, //UINT Depth;
1, //UINT MipLevels;
DXGI_FORMAT_R16_FLOAT, //DXGI_FORMAT Format;
D3D11_USAGE_DEFAULT, //D3D11_USAGE Usage;
D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_UNORDERED_ACCESS, //UINT BindFlags;
0, //UINT CPUAccessFlags;
0 //UINT MiscFlags;
};
// Accuracy of R8_UNORM is not sufficient to provide smooth animation
Tex3DDesc.Format = DXGI_FORMAT_R16_FLOAT;
CComPtr<ID3D11Texture3D> ptex3DCellDensity;
V(pDevice->CreateTexture3D( &Tex3DDesc, nullptr, &ptex3DCellDensity));
V(pDevice->CreateShaderResourceView( ptex3DCellDensity, nullptr, &m_ptex3DCellDensitySRV));
V(pDevice->CreateUnorderedAccessView( ptex3DCellDensity, nullptr, &m_ptex3DCellDensityUAV));
Tex3DDesc.Format = DXGI_FORMAT_R8_UNORM;
CComPtr<ID3D11Texture3D> ptex3DLightAttenuatingMass;
V(pDevice->CreateTexture3D( &Tex3DDesc, nullptr, &ptex3DLightAttenuatingMass));
V(pDevice->CreateShaderResourceView( ptex3DLightAttenuatingMass, nullptr, &m_ptex3DLightAttenuatingMassSRV));
V(pDevice->CreateUnorderedAccessView( ptex3DLightAttenuatingMass, nullptr, &m_ptex3DLightAttenuatingMassUAV));
}
return S_OK;
}
HRESULT CCloudsController::PrecomputParticleDensity(ID3D11Device *pDevice, ID3D11DeviceContext *pDeviceContext)
{
HRESULT hr;
int iNumStartPosZenithAngles = m_PrecomputedOpticalDepthTexDim.iNumStartPosZenithAngles;
int iNumStartPosAzimuthAngles = m_PrecomputedOpticalDepthTexDim.iNumStartPosAzimuthAngles;
int iNumDirectionZenithAngles = m_PrecomputedOpticalDepthTexDim.iNumDirectionZenithAngles;
int iNumDirectionAzimuthAngles= m_PrecomputedOpticalDepthTexDim.iNumDirectionAzimuthAngles;
D3D11_TEXTURE3D_DESC PrecomputedOpticalDepthTexDesc =
{
iNumStartPosZenithAngles, //UINT Width;
iNumStartPosAzimuthAngles, //UINT Height;
iNumDirectionZenithAngles * iNumDirectionAzimuthAngles, //UINT Depth;
5, //UINT MipLevels;
DXGI_FORMAT_R8_UNORM,//DXGI_FORMAT_R8G8_UNORM,//DXGI_FORMAT Format;
D3D11_USAGE_DEFAULT, //D3D11_USAGE Usage;
D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_RENDER_TARGET,//UINT BindFlags;
0,//UINT CPUAccessFlags;
D3D11_RESOURCE_MISC_GENERATE_MIPS //UINT MiscFlags;
};
CComPtr<ID3D11Texture3D> ptex3DPrecomputedParticleDensity;
V_RETURN( pDevice->CreateTexture3D(&PrecomputedOpticalDepthTexDesc, nullptr, &ptex3DPrecomputedParticleDensity));
m_ptex3DPrecomputedParticleDensitySRV.Release();
V_RETURN(pDevice->CreateShaderResourceView( ptex3DPrecomputedParticleDensity, nullptr, &m_ptex3DPrecomputedParticleDensitySRV));
if( !m_ComputeOpticalDepthTech.IsValid() )
{
CD3DShaderMacroHelper Macros;
DefineMacros(Macros);
Macros.AddShaderMacro("DENSITY_GENERATION_METHOD", m_CloudAttribs.uiDensityGenerationMethod);
Macros.Finalize();
m_ComputeOpticalDepthTech.SetDeviceAndContext(pDevice, pDeviceContext);
m_ComputeOpticalDepthTech.CreateVGPShadersFromFile(m_strPreprocessingEffectPath, "ScreenSizeQuadVS", nullptr, "PrecomputeOpticalDepthPS", Macros);
m_ComputeOpticalDepthTech.SetDS( m_pdsDisableDepth );
m_ComputeOpticalDepthTech.SetRS( m_prsSolidFillNoCull );
m_ComputeOpticalDepthTech.SetBS( m_pbsDefault );
}
CComPtr<ID3D11RenderTargetView> pOrigRTV;
CComPtr<ID3D11DepthStencilView> pOrigDSV;
pDeviceContext->OMGetRenderTargets(1, &pOrigRTV, &pOrigDSV);
D3D11_VIEWPORT OrigViewPort;
UINT iNumOldViewports = 1;
pDeviceContext->RSGetViewports(&iNumOldViewports, &OrigViewPort);
ID3D11Buffer *pCBs[] = {m_pcbGlobalCloudAttribs/*, RenderAttribs.pcMediaScatteringParams*/};
pDeviceContext->PSSetConstantBuffers(0, _countof(pCBs), pCBs);
ID3D11SamplerState *pSamplers[] = {m_psamLinearClamp, m_psamLinearWrap, m_psamPointWrap};
pDeviceContext->VSSetSamplers(0, _countof(pSamplers), pSamplers);
pDeviceContext->PSSetSamplers(0, _countof(pSamplers), pSamplers);
ID3D11ShaderResourceView *pSRVs[] =
{
m_ptex3DNoiseSRV,
};
for(UINT Slice = 0; Slice < PrecomputedOpticalDepthTexDesc.Depth; ++Slice)
{
D3D11_RENDER_TARGET_VIEW_DESC RTVDesc;
RTVDesc.Format = PrecomputedOpticalDepthTexDesc.Format;
RTVDesc.ViewDimension = D3D11_RTV_DIMENSION_TEXTURE3D;
RTVDesc.Texture3D.MipSlice = 0;
RTVDesc.Texture3D.FirstWSlice = Slice;
RTVDesc.Texture3D.WSize = 1;
CComPtr<ID3D11RenderTargetView> pSliceRTV;
V_RETURN(pDevice->CreateRenderTargetView( ptex3DPrecomputedParticleDensity, &RTVDesc, &pSliceRTV));
UINT uiDirectionZenith = Slice % iNumDirectionZenithAngles;
UINT uiDirectionAzimuth= Slice / iNumDirectionZenithAngles;
m_CloudAttribs.f4Parameter.x = ((float)uiDirectionZenith + 0.5f) / (float)iNumDirectionZenithAngles;
m_CloudAttribs.f4Parameter.y = ((float)uiDirectionAzimuth + 0.5f) / (float)iNumDirectionAzimuthAngles;
assert(0 < m_CloudAttribs.f4Parameter.x && m_CloudAttribs.f4Parameter.x < 1);
assert(0 < m_CloudAttribs.f4Parameter.y && m_CloudAttribs.f4Parameter.y < 1);
UpdateConstantBuffer(pDeviceContext, m_pcbGlobalCloudAttribs, &m_CloudAttribs, sizeof(m_CloudAttribs));
pDeviceContext->OMSetRenderTargets(1, &pSliceRTV.p, nullptr);
pDeviceContext->PSSetShaderResources(0, _countof(pSRVs), pSRVs);
RenderQuad(pDeviceContext, m_ComputeOpticalDepthTech, PrecomputedOpticalDepthTexDesc.Width, PrecomputedOpticalDepthTexDesc.Height);
}
// TODO: need to use proper filtering for coarser mip levels
pDeviceContext->GenerateMips( m_ptex3DPrecomputedParticleDensitySRV);
pDeviceContext->OMSetRenderTargets(1, &pOrigRTV.p, pOrigDSV);
pDeviceContext->RSSetViewports(iNumOldViewports, &OrigViewPort);
return S_OK;
}
HRESULT CCloudsController::PrecomputeScatteringInParticle(ID3D11Device *pDevice, ID3D11DeviceContext *pDeviceContext)
{
HRESULT hr;
LPCTSTR SingleSctrTexPath = L"media\\SingleSctr.dds";
LPCTSTR MultipleSctrTexPath = L"media\\MultipleSctr.dds";
HRESULT hr1 = D3DX11CreateShaderResourceViewFromFile(pDevice, SingleSctrTexPath, nullptr, nullptr, &m_ptex3DSingleSctrInParticleLUT_SRV, nullptr);
HRESULT hr2 = D3DX11CreateShaderResourceViewFromFile(pDevice, MultipleSctrTexPath, nullptr, nullptr, &m_ptex3DMultipleSctrInParticleLUT_SRV, nullptr);
if( SUCCEEDED(hr1) && SUCCEEDED(hr2) )
return S_OK;
D3D11_TEXTURE3D_DESC PrecomputedScatteringTexDesc =
{
m_PrecomputedSctrInParticleLUTDim.iNumStartPosZenithAngles, //UINT Width;
m_PrecomputedSctrInParticleLUTDim.iNumViewDirAzimuthAngles, //UINT Height;
// We are only interested in rays going into the sphere, which is half of the total number of diections
m_PrecomputedSctrInParticleLUTDim.iNumViewDirZenithAngles/2, //UINT Depth;
1, //UINT MipLevels;
DXGI_FORMAT_R16_FLOAT,//DXGI_FORMAT Format;
D3D11_USAGE_DEFAULT, //D3D11_USAGE Usage;
D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_RENDER_TARGET,//UINT BindFlags;
0,//UINT CPUAccessFlags;
0 //UINT MiscFlags;
};
CComPtr<ID3D11Texture3D> ptex3DSingleScatteringInParticleLUT, ptex3DMultipleScatteringInParticleLUT;
V_RETURN( pDevice->CreateTexture3D(&PrecomputedScatteringTexDesc, nullptr, &ptex3DSingleScatteringInParticleLUT));
V_RETURN( pDevice->CreateTexture3D(&PrecomputedScatteringTexDesc, nullptr, &ptex3DMultipleScatteringInParticleLUT));
m_ptex3DSingleSctrInParticleLUT_SRV.Release();
m_ptex3DMultipleSctrInParticleLUT_SRV.Release();
V_RETURN(pDevice->CreateShaderResourceView( ptex3DSingleScatteringInParticleLUT, nullptr, &m_ptex3DSingleSctrInParticleLUT_SRV));
V_RETURN(pDevice->CreateShaderResourceView( ptex3DMultipleScatteringInParticleLUT, nullptr, &m_ptex3DMultipleSctrInParticleLUT_SRV));
D3D11_TEXTURE3D_DESC TmpScatteringTexDesc = PrecomputedScatteringTexDesc;
TmpScatteringTexDesc.Format = DXGI_FORMAT_R32_FLOAT;
TmpScatteringTexDesc.Depth = m_PrecomputedSctrInParticleLUTDim.iNumViewDirZenithAngles * m_PrecomputedSctrInParticleLUTDim.iNumDistancesFromCenter;
CComPtr<ID3D11Texture3D> ptex3DSingleSctr, ptex3DGatheredScatteringN, ptex3DSctrOrderN, ptex3DMultipeScattering;
V_RETURN( pDevice->CreateTexture3D(&TmpScatteringTexDesc, nullptr, &ptex3DSingleSctr));
V_RETURN( pDevice->CreateTexture3D(&TmpScatteringTexDesc, nullptr, &ptex3DGatheredScatteringN));
V_RETURN( pDevice->CreateTexture3D(&TmpScatteringTexDesc, nullptr, &ptex3DSctrOrderN));
V_RETURN( pDevice->CreateTexture3D(&TmpScatteringTexDesc, nullptr, &ptex3DMultipeScattering));
std::vector< CComPtr<ID3D11RenderTargetView> > ptex3DSingleSctrRTVs(TmpScatteringTexDesc.Depth);
std::vector< CComPtr<ID3D11RenderTargetView> > ptex3DGatheredScatteringN_RTVs(TmpScatteringTexDesc.Depth);
std::vector< CComPtr<ID3D11RenderTargetView> > ptex3DSctrOrderN_RTVs(TmpScatteringTexDesc.Depth);
std::vector< CComPtr<ID3D11RenderTargetView> > ptex3DMultipeScatteringRTVs(TmpScatteringTexDesc.Depth);
CComPtr<ID3D11ShaderResourceView> ptex3DSingleSctrSRV;
CComPtr<ID3D11ShaderResourceView> ptex3DGatheredScatteringN_SRV;
CComPtr<ID3D11ShaderResourceView> ptex3DSctrOrderN_SRV;
CComPtr<ID3D11ShaderResourceView> ptex3DMultipeScatteringSRV;
V_RETURN(pDevice->CreateShaderResourceView( ptex3DSingleSctr, nullptr, &ptex3DSingleSctrSRV));
V_RETURN(pDevice->CreateShaderResourceView( ptex3DGatheredScatteringN, nullptr, &ptex3DGatheredScatteringN_SRV));
V_RETURN(pDevice->CreateShaderResourceView( ptex3DSctrOrderN, nullptr, &ptex3DSctrOrderN_SRV));
V_RETURN(pDevice->CreateShaderResourceView( ptex3DMultipeScattering, nullptr, &ptex3DMultipeScatteringSRV));
for(UINT Slice = 0; Slice < TmpScatteringTexDesc.Depth; ++Slice)
{
D3D11_RENDER_TARGET_VIEW_DESC RTVDesc;
RTVDesc.ViewDimension = D3D11_RTV_DIMENSION_TEXTURE3D;
RTVDesc.Texture3D.MipSlice = 0;
RTVDesc.Texture3D.FirstWSlice = Slice;
RTVDesc.Texture3D.WSize = 1;
RTVDesc.Format = TmpScatteringTexDesc.Format;
V_RETURN(pDevice->CreateRenderTargetView( ptex3DSingleSctr, &RTVDesc, &ptex3DSingleSctrRTVs[Slice]) );
V_RETURN(pDevice->CreateRenderTargetView( ptex3DGatheredScatteringN, &RTVDesc, &ptex3DGatheredScatteringN_RTVs[Slice]));
V_RETURN(pDevice->CreateRenderTargetView( ptex3DSctrOrderN, &RTVDesc, &ptex3DSctrOrderN_RTVs[Slice]) );
V_RETURN(pDevice->CreateRenderTargetView( ptex3DMultipeScattering, &RTVDesc, &ptex3DMultipeScatteringRTVs[Slice]) );
}
if( !m_ComputeSingleSctrInParticleTech.IsValid() )
{
CD3DShaderMacroHelper Macros;
DefineMacros(Macros);
Macros.Finalize();
m_ComputeSingleSctrInParticleTech.SetDeviceAndContext(pDevice, pDeviceContext);
m_ComputeSingleSctrInParticleTech.CreateVGPShadersFromFile(m_strPreprocessingEffectPath, "ScreenSizeQuadVS", nullptr, "PrecomputeSingleSctrPS", Macros);
m_ComputeSingleSctrInParticleTech.SetDS( m_pdsDisableDepth );
m_ComputeSingleSctrInParticleTech.SetRS( m_prsSolidFillNoCull );
m_ComputeSingleSctrInParticleTech.SetBS( m_pbsDefault );
}
if( !m_RenderScatteringLUTSliceTech.IsValid() )
{
CD3DShaderMacroHelper Macros;
DefineMacros(Macros);
Macros.Finalize();
m_RenderScatteringLUTSliceTech.SetDeviceAndContext(pDevice, pDeviceContext);
m_RenderScatteringLUTSliceTech.CreateVGPShadersFromFile(m_strPreprocessingEffectPath, "ScreenSizeQuadVS", nullptr, "RenderScatteringLUTSlicePS", Macros);
m_RenderScatteringLUTSliceTech.SetDS( m_pdsDisableDepth );
m_RenderScatteringLUTSliceTech.SetRS( m_prsSolidFillNoCull );
m_RenderScatteringLUTSliceTech.SetBS( m_pbsDefault );
}
if( !m_GatherPrevSctrOrderTech.IsValid() )
{
CD3DShaderMacroHelper Macros;
DefineMacros(Macros);
Macros.Finalize();
m_GatherPrevSctrOrderTech.SetDeviceAndContext(pDevice, pDeviceContext);
m_GatherPrevSctrOrderTech.CreateVGPShadersFromFile(m_strPreprocessingEffectPath, "ScreenSizeQuadVS", nullptr, "GatherScatteringPS", Macros);
m_GatherPrevSctrOrderTech.SetDS( m_pdsDisableDepth );
m_GatherPrevSctrOrderTech.SetRS( m_prsSolidFillNoCull );
m_GatherPrevSctrOrderTech.SetBS( m_pbsDefault );
}
if( !m_ComputeScatteringOrderTech.IsValid() )
{
CD3DShaderMacroHelper Macros;
DefineMacros(Macros);
Macros.Finalize();
m_ComputeScatteringOrderTech.SetDeviceAndContext(pDevice, pDeviceContext);
m_ComputeScatteringOrderTech.CreateVGPShadersFromFile(m_strPreprocessingEffectPath, "ScreenSizeQuadVS", nullptr, "ComputeScatteringOrderPS", Macros);
m_ComputeScatteringOrderTech.SetDS( m_pdsDisableDepth );
m_ComputeScatteringOrderTech.SetRS( m_prsSolidFillNoCull );
m_ComputeScatteringOrderTech.SetBS( m_pbsDefault );
}
if( !m_AccumulateInscatteringTech.IsValid() )
{
CD3DShaderMacroHelper Macros;
DefineMacros(Macros);
Macros.Finalize();
m_AccumulateInscatteringTech.SetDeviceAndContext(pDevice, pDeviceContext);
m_AccumulateInscatteringTech.CreateVGPShadersFromFile(m_strPreprocessingEffectPath, "ScreenSizeQuadVS", nullptr, "AccumulateMultipleScattering", Macros);
m_AccumulateInscatteringTech.SetDS( m_pdsDisableDepth );
m_AccumulateInscatteringTech.SetRS( m_prsSolidFillNoCull );
D3D11_BLEND_DESC AdditiveBlendStateDesc;
ZeroMemory(&AdditiveBlendStateDesc, sizeof(AdditiveBlendStateDesc));
AdditiveBlendStateDesc.IndependentBlendEnable = FALSE;
for(int i=0; i< _countof(AdditiveBlendStateDesc.RenderTarget); i++)
AdditiveBlendStateDesc.RenderTarget[i].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL;
AdditiveBlendStateDesc.RenderTarget[0].BlendEnable = TRUE;
AdditiveBlendStateDesc.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD;
AdditiveBlendStateDesc.RenderTarget[0].BlendOpAlpha= D3D11_BLEND_OP_ADD;
AdditiveBlendStateDesc.RenderTarget[0].DestBlend = D3D11_BLEND_ONE;
AdditiveBlendStateDesc.RenderTarget[0].DestBlendAlpha= D3D11_BLEND_ONE;
AdditiveBlendStateDesc.RenderTarget[0].SrcBlend = D3D11_BLEND_ONE;
AdditiveBlendStateDesc.RenderTarget[0].SrcBlendAlpha= D3D11_BLEND_ONE;
CComPtr<ID3D11BlendState> pAdditiveBlendBS;
V_RETURN( pDevice->CreateBlendState( &AdditiveBlendStateDesc, &pAdditiveBlendBS) );
m_AccumulateInscatteringTech.SetBS( pAdditiveBlendBS );
}
CComPtr<ID3D11RenderTargetView> pOrigRTV;
CComPtr<ID3D11DepthStencilView> pOrigDSV;
pDeviceContext->OMGetRenderTargets(1, &pOrigRTV, &pOrigDSV);
D3D11_VIEWPORT OrigViewPort;
UINT iNumOldViewports = 1;
pDeviceContext->RSGetViewports(&iNumOldViewports, &OrigViewPort);
ID3D11Buffer *pCBs[] = {m_pcbGlobalCloudAttribs/*, RenderAttribs.pcMediaScatteringParams*/};
pDeviceContext->PSSetConstantBuffers(0, _countof(pCBs), pCBs);
ID3D11SamplerState *pSamplers[] = {m_psamLinearClamp, m_psamLinearWrap, m_psamPointWrap};
pDeviceContext->VSSetSamplers(0, _countof(pSamplers), pSamplers);
pDeviceContext->PSSetSamplers(0, _countof(pSamplers), pSamplers);
for(UINT Slice = 0; Slice < TmpScatteringTexDesc.Depth; ++Slice)
{
float Zero[4]={0,0,0,0};
pDeviceContext->ClearRenderTargetView(ptex3DMultipeScatteringRTVs[Slice], Zero);
}
// Precompute single scattering
for(UINT Slice = 0; Slice < TmpScatteringTexDesc.Depth; ++Slice)
{
UINT uiViewDirZenith = Slice % m_PrecomputedSctrInParticleLUTDim.iNumViewDirZenithAngles;
UINT uiDistFromCenter = Slice / m_PrecomputedSctrInParticleLUTDim.iNumViewDirZenithAngles;
m_CloudAttribs.f4Parameter.x = ((float)uiViewDirZenith + 0.5f) / (float)m_PrecomputedSctrInParticleLUTDim.iNumViewDirZenithAngles;
m_CloudAttribs.f4Parameter.y = ((float)uiDistFromCenter + 0.5f) / (float)m_PrecomputedSctrInParticleLUTDim.iNumDistancesFromCenter;
assert(0 < m_CloudAttribs.f4Parameter.x && m_CloudAttribs.f4Parameter.x < 1);
assert(0 < m_CloudAttribs.f4Parameter.y && m_CloudAttribs.f4Parameter.y < 1);
UpdateConstantBuffer(pDeviceContext, m_pcbGlobalCloudAttribs, &m_CloudAttribs, sizeof(m_CloudAttribs));
ID3D11RenderTargetView *pSliceRTV = ptex3DSingleSctrRTVs[Slice];
pDeviceContext->OMSetRenderTargets(1, &pSliceRTV, nullptr);
ID3D11ShaderResourceView *pSRVs[] =
{
m_ptex3DNoiseSRV,
};
pDeviceContext->PSSetShaderResources(0, _countof(pSRVs), pSRVs);
RenderQuad(pDeviceContext, m_ComputeSingleSctrInParticleTech, TmpScatteringTexDesc.Width, TmpScatteringTexDesc.Height);
}
// Number of scattering orders is chosen so as to obtain reasonable exitance through the particle surface
const int iMaxScatteringOrder = 18;
for(int iSctrOrder = 1; iSctrOrder < iMaxScatteringOrder; ++iSctrOrder)
{
for(int iPass = 0; iPass < 3; ++iPass)
{
// Gather scattering of previous order
for(UINT Slice = 0; Slice < TmpScatteringTexDesc.Depth; ++Slice)
{
if( iPass < 2 )
{
UINT uiViewDirZenith = Slice % m_PrecomputedSctrInParticleLUTDim.iNumViewDirZenithAngles;
UINT uiDistFromCenter = Slice / m_PrecomputedSctrInParticleLUTDim.iNumViewDirZenithAngles;
m_CloudAttribs.f4Parameter.x = ((float)uiViewDirZenith + 0.5f) / (float)m_PrecomputedSctrInParticleLUTDim.iNumViewDirZenithAngles;
m_CloudAttribs.f4Parameter.y = ((float)uiDistFromCenter + 0.5f) / (float)m_PrecomputedSctrInParticleLUTDim.iNumDistancesFromCenter;
assert(0 < m_CloudAttribs.f4Parameter.x && m_CloudAttribs.f4Parameter.x < 1);
assert(0 < m_CloudAttribs.f4Parameter.y && m_CloudAttribs.f4Parameter.y < 1);
m_CloudAttribs.f4Parameter.w = (float)iSctrOrder;
}
else
{
m_CloudAttribs.f4Parameter.x = ((float)Slice + 0.5f) / (float)TmpScatteringTexDesc.Depth;
assert(0 < m_CloudAttribs.f4Parameter.x && m_CloudAttribs.f4Parameter.x < 1);
}
UpdateConstantBuffer(pDeviceContext, m_pcbGlobalCloudAttribs, &m_CloudAttribs, sizeof(m_CloudAttribs));
ID3D11RenderTargetView *pSliceRTV = nullptr;
CRenderTechnique *pTechnique = nullptr;
ID3D11ShaderResourceView *pSRVs[1] = {nullptr};
switch(iPass)
{
// Gather scattering of previous order
case 0:
pSRVs[0] = iSctrOrder > 1 ? ptex3DSctrOrderN_SRV : ptex3DSingleSctrSRV;
pSliceRTV = ptex3DGatheredScatteringN_RTVs[Slice];
pTechnique = &m_GatherPrevSctrOrderTech;
break;
// Compute current scattering order
case 1:
pSRVs[0] = ptex3DGatheredScatteringN_SRV;
pSliceRTV = ptex3DSctrOrderN_RTVs[Slice];
pTechnique = &m_ComputeScatteringOrderTech;
break;
// Accumulate current scattering order
case 2:
pSRVs[0] = ptex3DSctrOrderN_SRV;
pSliceRTV = ptex3DMultipeScatteringRTVs[Slice];
pTechnique = &m_AccumulateInscatteringTech;
break;
}
pDeviceContext->OMSetRenderTargets(1, &pSliceRTV, nullptr);
pDeviceContext->PSSetShaderResources(0, _countof(pSRVs), pSRVs);
RenderQuad(pDeviceContext, *pTechnique, TmpScatteringTexDesc.Width, TmpScatteringTexDesc.Height);
}
}
}
// Copy single and multiple scattering to the textures
for(UINT Slice = 0; Slice < PrecomputedScatteringTexDesc.Depth; ++Slice)
{
D3D11_RENDER_TARGET_VIEW_DESC RTVDesc;
RTVDesc.ViewDimension = D3D11_RTV_DIMENSION_TEXTURE3D;
RTVDesc.Texture3D.MipSlice = 0;
RTVDesc.Texture3D.FirstWSlice = Slice;
RTVDesc.Texture3D.WSize = 1;
RTVDesc.Format = PrecomputedScatteringTexDesc.Format;
CComPtr<ID3D11RenderTargetView> pSingleSctrSliceRTV, pMultSctrSliceRTV;
V_RETURN(pDevice->CreateRenderTargetView( ptex3DSingleScatteringInParticleLUT, &RTVDesc, &pSingleSctrSliceRTV));
V_RETURN(pDevice->CreateRenderTargetView( ptex3DMultipleScatteringInParticleLUT, &RTVDesc, &pMultSctrSliceRTV));
m_CloudAttribs.f4Parameter.x = ((float)Slice + 0.5f) / (float)PrecomputedScatteringTexDesc.Depth;
UpdateConstantBuffer(pDeviceContext, m_pcbGlobalCloudAttribs, &m_CloudAttribs, sizeof(m_CloudAttribs));
ID3D11RenderTargetView *pRTVs[] = {pSingleSctrSliceRTV, pMultSctrSliceRTV};
pDeviceContext->OMSetRenderTargets(_countof(pRTVs), pRTVs, nullptr);
ID3D11ShaderResourceView *pSRVs[] =
{
ptex3DSingleSctrSRV,
ptex3DMultipeScatteringSRV
};
pDeviceContext->PSSetShaderResources(0, _countof(pSRVs), pSRVs);
RenderQuad(pDeviceContext, m_RenderScatteringLUTSliceTech, PrecomputedScatteringTexDesc.Width, PrecomputedScatteringTexDesc.Height);
}
D3DX11SaveTextureToFile(pDeviceContext, ptex3DSingleScatteringInParticleLUT, D3DX11_IFF_DDS, SingleSctrTexPath);
D3DX11SaveTextureToFile(pDeviceContext, ptex3DMultipleScatteringInParticleLUT, D3DX11_IFF_DDS, MultipleSctrTexPath);
pDeviceContext->OMSetRenderTargets(1, &pOrigRTV.p, pOrigDSV);
pDeviceContext->RSSetViewports(iNumOldViewports, &OrigViewPort);
return S_OK;
}
float CubicInterpolate(float ym1, float y0, float y1, float y2, float x)
{
float b0 = 0*ym1 + 6*y0 + 0*y1 + 0*y2;
float b1 =-2*ym1 - 3*y0 + 6*y1 - 1*y2;
float b2 = 3*ym1 - 6*y0 + 3*y1 + 0*y2;
float b3 =-1*ym1 + 3*y0 - 3*y1 + 1*y2;
float x2 = x*x;
float x3 = x2*x;
return 1.f/6.f * (b0 + x*b1 + x2*b2 + x3*b3);
}
HRESULT CCloudsController::Create3DNoise(ID3D11Device *pDevice)
{
HRESULT hr;
// Create 3D noise
UINT uiMips = 8;
UINT uiDim = 1 << (uiMips-1);
D3D11_TEXTURE3D_DESC NoiseTexDesc =
{
uiDim, //UINT Width;
uiDim, //UINT Height;
uiDim, //UINT Depth;
uiMips, //UINT MipLevels;
DXGI_FORMAT_R8_UNORM,//DXGI_FORMAT Format;
D3D11_USAGE_DEFAULT, //D3D11_USAGE Usage;
D3D11_BIND_SHADER_RESOURCE,//UINT BindFlags;
0,//UINT CPUAccessFlags;
0//UINT MiscFlags;
};
size_t DataSize = 0;
for(UINT Mip=0; Mip < uiMips; ++Mip)
DataSize += (NoiseTexDesc.Width>>Mip) * (NoiseTexDesc.Height>>Mip) * (NoiseTexDesc.Depth>>Mip);
std::vector<float> NoiseData(DataSize);
#define NOISE(i,j,k) NoiseData[i + j * NoiseTexDesc.Width + k * (NoiseTexDesc.Width * NoiseTexDesc.Height)]
// Populate texture with random noise
UINT InitialStep = 8;
for(UINT i=0; i < NoiseTexDesc.Width; i+=InitialStep)
for(UINT j=0; j < NoiseTexDesc.Height; j+=InitialStep)
for(UINT k=0; k < NoiseTexDesc.Depth; k+=InitialStep)
NOISE(i,j,k) = (float)rand() / (float)RAND_MAX;
// Smooth rows
for(UINT i=0; i < NoiseTexDesc.Width; ++i)
for(UINT j=0; j < NoiseTexDesc.Height; j+=InitialStep)
for(UINT k=0; k < NoiseTexDesc.Depth; k+=InitialStep)
{
int i0 = (i/InitialStep)*InitialStep;
int im1 = i0-InitialStep;
if( im1 < 0 )im1 += NoiseTexDesc.Width;
int i1 = (i0+InitialStep) % NoiseTexDesc.Width;
int i2 = (i0+2*InitialStep) % NoiseTexDesc.Width;
NOISE(i,j,k) = CubicInterpolate( NOISE(im1,j,k), NOISE(i0,j,k), NOISE(i1,j,k), NOISE(i2,j,k), (float)(i-i0) / (float)InitialStep );
}
// Smooth columns