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Caustics.cpp
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/***************************************************************************
# Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of NVIDIA CORPORATION nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
***************************************************************************/
#include "Caustics.h"
#include "Scene/Model/Model.h"
static const glm::vec4 kClearColor(0.f, 0.f, 0.f, 1);
static const std::string kDefaultScene = "Caustics/ring.fscene";
std::string to_string(const vec3& v)
{
std::string s;
s += "(" + std::to_string(v.x) + ", " + std::to_string(v.y) + ", " + std::to_string(v.z) + ")";
return s;
}
const FileDialogFilterVec settingFilter = { {"ini", "Scene Setting File"} };
void Caustics::onGuiRender(Gui* pGui)
{
pGui->addCheckBox("Ray Trace", mRayTrace);
if (pGui->addButton("Load Scene"))
{
std::string filename;
if (openFileDialog(Scene::kFileExtensionFilters, filename))
{
loadScene(filename, gpFramework->getTargetFbo().get());
loadShader();
}
}
if (pGui->addButton("Load Scene Settings"))
{
std::string filename;
if (openFileDialog(settingFilter, filename))
{
loadSceneSetting(filename);
}
}
if (pGui->addButton("Save Scene Settings"))
{
std::string filename;
if (saveFileDialog(settingFilter, filename))
{
saveSceneSetting(filename);
}
}
if (pGui->addButton("Update Shader"))
{
loadShader();
}
if (pGui->beginGroup("Display", true))
{
{
Gui::DropdownList debugModeList;
debugModeList.push_back({ 0, "Rasterize" });
debugModeList.push_back({ 1, "Depth" });
debugModeList.push_back({ 2, "Normal" });
debugModeList.push_back({ 3, "Diffuse" });
debugModeList.push_back({ 4, "Specular" });
debugModeList.push_back({ 5, "Photon" });
debugModeList.push_back({ 6, "World" });
debugModeList.push_back({ 7, "Roughness" });
debugModeList.push_back({ 8, "Ray Info" });
debugModeList.push_back({ 9, "Raytrace" });
debugModeList.push_back({ 10, "Avg. Screen Area" });
debugModeList.push_back({ 11, "Screen Area Std. Variance" });
debugModeList.push_back({ 12, "Photon Count" });
debugModeList.push_back({ 13, "Photon Total Count" });
debugModeList.push_back({ 14, "Ray count Mipmap" });
pGui->addDropdown("Composite mode", debugModeList, (uint32_t&)mDebugMode);
}
pGui->addFloatVar("Max Pixel Value", mMaxPixelArea, 0, 1000000000, 5.f);
pGui->addFloatVar("Max Photon Count", mMaxPhotonCount, 0, 1000000000, 5.f);
pGui->addIntVar("Ray Count Mipmap", mRayCountMipIdx, 0, 11);
{
Gui::DropdownList debugModeList;
debugModeList.push_back({ 1, "x1" });
debugModeList.push_back({ 2, "x2" });
debugModeList.push_back({ 4, "x4" });
debugModeList.push_back({ 8, "x8" });
debugModeList.push_back({ 16, "x16" });
pGui->addDropdown("Ray Tex Scale", debugModeList, (uint32_t&)mRayTexScaleFactor);
}
pGui->endGroup();
}
if (pGui->beginGroup("Photon Trace", true))
{
{
Gui::DropdownList debugModeList;
debugModeList.push_back({ 0, "Fixed Resolution" });
debugModeList.push_back({ 1, "Adaptive Resolution" });
debugModeList.push_back({ 2, "None" });
debugModeList.push_back({ 3, "Adaptive Resolution With Ray Mipmap" });
pGui->addDropdown("Trace Type", debugModeList, (uint32_t&)mTraceType);
}
{
Gui::DropdownList debugModeList;
debugModeList.push_back({ 0, "Ray Differential" });
debugModeList.push_back({ 1, "Ray Cone" });
debugModeList.push_back({ 2, "None" });
pGui->addDropdown("Ray Type", debugModeList, (uint32_t&)mPhotonTraceMacro);
}
{
Gui::DropdownList debugModeList;
debugModeList.push_back({ 64, "64" });
debugModeList.push_back({ 128, "128" });
debugModeList.push_back({ 256, "256" });
debugModeList.push_back({ 512, "512" });
debugModeList.push_back({ 1024, "1024" });
debugModeList.push_back({ 2048, "2048" });
pGui->addDropdown("Dispatch Size", debugModeList, (uint32_t&)mDispatchSize);
}
{
Gui::DropdownList debugModeList;
debugModeList.push_back({ 0, "Avg Square" });
debugModeList.push_back({ 1, "Avg Length" });
debugModeList.push_back({ 2, "Max Square" });
debugModeList.push_back({ 3, "Exact Area" });
pGui->addDropdown("Area Type", debugModeList, (uint32_t&)mAreaType);
}
pGui->addFloatVar("Intensity", mIntensity, 0, 10, 0.1f);
pGui->addFloatVar("Emit size", mEmitSize, 0, 1000, 1);
pGui->addFloatVar("Rough Threshold", mRoughThreshold, 0, 1, 0.01f);
pGui->addIntVar("Max Trace Depth", mMaxTraceDepth, 0, 30);
pGui->addFloatVar("IOR Override", mIOROveride, 0, 3, 0.01f);
pGui->addCheckBox("ID As Color", mColorPhoton);
pGui->addIntVar("Photon ID Scale", mPhotonIDScale);
pGui->addFloatVar("Min Trace Luminance", mTraceColorThreshold, 0, 10,0.005f);
pGui->addFloatVar("Min Cull Luminance", mCullColorThreshold, 0, 10000, 0.001f);
pGui->addFloatVar("Max Pixel Radius", mMaxPhotonPixelRadius, 0, 5000, 1.f);
pGui->addCheckBox("Update Photon", mUpdatePhoton);
pGui->endGroup();
}
if (pGui->beginGroup("Adaptive Resolution", true))
{
{
Gui::DropdownList debugModeList;
debugModeList.push_back({ 0, "Random" });
debugModeList.push_back({ 1, "Grid" });
pGui->addDropdown("Sample Placement", debugModeList, (uint32_t&)mSamplePlacement);
}
pGui->addFloatVar("Luminance Threshold", mPixelLuminanceThreshold, 0.01f, 10.0, 0.01f);
pGui->addFloatVar("Photon Size Threshold", mMinPhotonPixelSize, 1.f, 1000.0f, 0.1f);
pGui->addFloatVar("Smooth Weight", mSmoothWeight, 0, 10.0f, 0.001f);
pGui->addFloatVar("Proportional Gain", mUpdateSpeed, 0, 1, 0.01f);
pGui->addFloatVar("Variance Gain", mVarianceGain, 0, 10, 0.0001f);
pGui->addFloatVar("Derivative Gain", mDerivativeGain, -10, 10, 0.1f);
pGui->addFloatVar("Max Task Per Pixel", mMaxTaskCountPerPixel, 1.0, 1000000, 5);
pGui->endGroup();
}
if (pGui->beginGroup("Smooth Photon", false))
{
pGui->addCheckBox("Remove Isolated Photon", mRemoveIsolatedPhoton);
pGui->addCheckBox("Enable Median Filter", mMedianFilter);
pGui->addFloatVar("Normal Threshold", mNormalThreshold, 0.01f, 1.0, 0.01f);
pGui->addFloatVar("Distance Threshold", mDistanceThreshold, 0.1f, 100.0f, 0.1f);
pGui->addFloatVar("Planar Threshold", mPlanarThreshold, 0.01f, 10.0, 0.1f);
pGui->addFloatVar("Trim Direction Threshold", trimDirectionThreshold, 0, 1);
pGui->addIntVar("Min Neighbour Count", mMinNeighbourCount, 0, 8);
pGui->endGroup();
}
if (pGui->beginGroup("Photon Splatting", true))
{
{
Gui::DropdownList debugModeList;
debugModeList.push_back({ 0, "Scatter" });
debugModeList.push_back({ 1, "Gather" });
debugModeList.push_back({ 2, "None" });
pGui->addDropdown("Density Estimation", debugModeList, (uint32_t&)mScatterOrGather);
}
pGui->addFloatVar("Splat size", mSplatSize, 0, 100, 0.01f);
pGui->addFloatVar("Kernel Power", mKernelPower, 0.01f, 10.f, 0.01f);
if(pGui->beginGroup("Scatter Parameters", false))
{
pGui->addFloatVar("Z Tolerance", mZTolerance, 0.001f, 1, 0.001f);
pGui->addFloatVar("Scatter Normal Threshold", mScatterNormalThreshold, 0.01f, 1.0, 0.01f);
pGui->addFloatVar("Scatter Distance Threshold", mScatterDistanceThreshold, 0.1f, 10.0f, 0.1f);
pGui->addFloatVar("Scatter Planar Threshold", mScatterPlanarThreshold, 0.01f, 10.0, 0.1f);
pGui->addFloatVar("Max Anisotropy", mMaxAnisotropy, 1, 100, 0.1f);
{
Gui::DropdownList debugModeList;
debugModeList.push_back({ 0, "Quad" });
debugModeList.push_back({ 1, "Sphere" });
pGui->addDropdown("Photon Geometry", debugModeList, (uint32_t&)mScatterGeometry);
}
{
Gui::DropdownList debugModeList;
debugModeList.push_back({ 0, "Kernel" });
debugModeList.push_back({ 1, "Solid" });
debugModeList.push_back({ 2, "Shaded" });
pGui->addDropdown("Photon Display Mode", debugModeList, (uint32_t&)mPhotonDisplayMode);
}
{
Gui::DropdownList debugModeList;
debugModeList.push_back({ 0, "Anisotropic" });
debugModeList.push_back({ 1, "Isotropic" });
debugModeList.push_back({ 2, "Photon Mesh" });
debugModeList.push_back({ 3, "Screen Dot" });
pGui->addDropdown("Photon mode", debugModeList, (uint32_t&)mPhotonMode);
}
pGui->endGroup();
}
if(pGui->beginGroup("Gather Parameters", false))
{
pGui->addFloatVar("Gather Depth Radius", mDepthRadius, 0, 10, 0.01f);
pGui->addFloatVar("Gather Min Color", mMinGatherColor, 0, 2, 0.001f);
pGui->addCheckBox("Gather Show Tile Count", mShowTileCount);
pGui->addIntVar("Gather Tile Count Scale", mTileCountScale, 0, 1000);
pGui->endGroup();
}
pGui->endGroup();
}
if (pGui->beginGroup("Temporal Filter", true))
{
pGui->addCheckBox("Enable Filter", mTemporalFilter);
pGui->addFloatVar("Filter Weight", mFilterWeight, 0.0f, 1.0f, 0.001f);
pGui->addFloatVar("Jitter", mJitter, 0, 2, 0.01f);
pGui->addFloatVar("Normal Filter Strength", mTemporalNormalKernel, 0.0001f, 10, 0.01f);
pGui->addFloatVar("Depth Filter Strength", mTemporalDepthKernel, 0.0001f, 10, 0.01f);
pGui->endGroup();
}
if (pGui->beginGroup("Composite", true))
{
{
int oldResRatio = mCausticsMapResRatio;
Gui::DropdownList debugModeList;
debugModeList.push_back({ 1, "x 1" });
debugModeList.push_back({ 2, "x 1/2" });
debugModeList.push_back({ 4, "x 1/4" });
debugModeList.push_back({ 8, "x 1/8" });
pGui->addDropdown("Caustics Resolution", debugModeList, (uint32_t&)mCausticsMapResRatio);
if (oldResRatio != mCausticsMapResRatio)
{
createCausticsMap();
}
}
pGui->addCheckBox("Filter Caustics Map", mFilterCausticsMap);
pGui->addFloatVar("UV Kernel", mUVKernel, 0.0f, 1000.f, 0.1f);
pGui->addFloatVar("Depth Kernel", mZKernel, 0.0f, 1000.f, 0.1f);
pGui->addFloatVar("Normal Kernel", mNormalKernel, 0.0f, 1000.f, 0.1f);
pGui->endGroup();
}
mLightDirection = vec3(
cos(mLightAngle.x) * sin(mLightAngle.y),
cos(mLightAngle.y),
sin(mLightAngle.x) * sin(mLightAngle.y));
if (pGui->beginGroup("Light", true))
{
pGui->addFloat2Var("Light Angle", mLightAngle, -FLT_MAX, FLT_MAX, 0.01f);
if (mpScene)
{
auto light0 = dynamic_cast<DirectionalLight*>(mpScene->getLight(0).get());
light0->setWorldDirection(mLightDirection);
}
pGui->addFloat2Var("Light Angle Speed", mLightAngleSpeed, -FLT_MAX, FLT_MAX, 0.001f);
mLightAngle += mLightAngleSpeed*0.01f;
pGui->endGroup();
}
if (pGui->beginGroup("Camera"))
{
mpCamera->renderUI(pGui);
pGui->endGroup();
}
}
void Caustics::loadScene(const std::string& filename, const Fbo* pTargetFbo)
{
mpScene = RtScene::loadFromFile(filename, RtBuildFlags::None, Model::LoadFlags::None);
if (!mpScene) return;
mpQuad = Model::createFromFile("Caustics/quad.obj");
mpSphere = Model::createFromFile("Caustics/sphere.obj");
Model::SharedPtr pModel = mpScene->getModel(0);
float radius = pModel->getRadius();
mpCamera = mpScene->getActiveCamera();
assert(mpCamera);
mCamController.attachCamera(mpCamera);
Sampler::Desc samplerDesc;
samplerDesc.setFilterMode(Sampler::Filter::Linear, Sampler::Filter::Linear, Sampler::Filter::Linear);
Sampler::SharedPtr pSampler = Sampler::create(samplerDesc);
pModel->bindSamplerToMaterials(pSampler);
// Update the controllers
mCamController.setCameraSpeed(radius * 0.2f);
auto sceneBBox = mpScene->getBoundingBox();
float sceneRadius = sceneBBox.getSize().length() * 0.5f;
//mCamController.setModelParams(mpScene->getCenter(), sceneRadius, sceneRadius);
float nearZ = std::max(0.1f, pModel->getRadius() / 750.0f);
float farZ = radius * 10;
mpCamera->setDepthRange(nearZ, farZ);
mpCamera->setAspectRatio((float)pTargetFbo->getWidth() / (float)pTargetFbo->getHeight());
mpGaussianKernel = Texture::createFromFile("Caustics/gaussian.png", true, false);
mpUniformNoise = Texture::createFromFile("Caustics/uniform.png", true, false);
}
Caustics::PhotonTraceShader Caustics::getPhotonTraceShader()
{
uint flag = photonMacroToFlags();
auto pIter = mPhotonTraceShaderList.find(flag);
if (pIter == mPhotonTraceShaderList.end())
{
RtProgram::Desc desc;
desc.addShaderLibrary("PhotonTrace.rt.hlsl");
desc.setRayGen("rayGen");
desc.addHitGroup(0, "primaryClosestHit", "");
desc.addMiss(0, "primaryMiss");
switch (mPhotonTraceMacro)
{
case Caustics::RAY_DIFFERENTIAL:
desc.addDefine("RAY_DIFFERENTIAL", "1");
break;
case Caustics::RAY_CONE:
desc.addDefine("RAY_CONE", "1");
break;
case Caustics::RAY_NONE:
desc.addDefine("RAY_NONE", "1");
break;
default:
break;
}
switch (mTraceType)
{
case Caustics::TRACE_FIXED:
desc.addDefine("TRACE_FIXED", "1");
break;
case Caustics::TRACE_ADAPTIVE:
desc.addDefine("TRACE_ADAPTIVE", "1");
break;
case Caustics::TRACE_NONE:
desc.addDefine("TRACE_NONE", "1");
break;
case Caustics::TRACE_ADAPTIVE_RAY_MIP_MAP:
desc.addDefine("TRACE_ADAPTIVE_RAY_MIP_MAP", "1");
break;
default:
break;
}
//photonTraceProgDesc.addHitGroup(1, "", "shadowAnyHit");
//photonTraceProgDesc.addMiss(1, "shadowMiss");
auto pPhotonTraceProgram = RtProgram::create(desc, 80U);
auto pPhotonTraceState = RtState::create();
pPhotonTraceState->setProgram(pPhotonTraceProgram);
auto pPhotonTraceVars = RtProgramVars::create(pPhotonTraceProgram, mpScene);
//mpPhotonTraceRenderer = RtSceneRenderer::create(mpScene);
mPhotonTraceShaderList[flag] = { pPhotonTraceProgram , pPhotonTraceVars ,pPhotonTraceState };
}
return mPhotonTraceShaderList[flag];
}
void Caustics::loadSceneSetting(std::string path)
{
std::ifstream file(path, std::ios::in);
if (!file)
{
return;
}
file >> mLightAngle.x >> mLightAngle.y;
float3 camOri, camTarget;
file >> camOri.x >> camOri.y >> camOri.z;
file >> camTarget.x >> camTarget.y >> camTarget.z;
mpCamera->setPosition(camOri);
mpCamera->setTarget(camTarget);
}
void Caustics::saveSceneSetting(std::string path)
{
if (path.find(".ini") == std::string::npos)
{
path += ".ini";
}
std::ofstream file(path, std::ios::out);
if (!file)
{
return;
}
file << mLightAngle.x << " " << mLightAngle.y << std::endl;
float3 camOri = mpCamera->getPosition();
float3 camTarget = mpCamera->getTarget();
file << camOri.x << " " << camOri.y << " " << camOri.z << std::endl;
file << camTarget.x << " " << camTarget.y << " " << camTarget.z << std::endl;
}
void Caustics::createCausticsMap()
{
uint32_t width = mpRtOut->getWidth();
uint32_t height = mpRtOut->getHeight();
uint2 dim(width / mCausticsMapResRatio, height / mCausticsMapResRatio);
auto pPhotonMapTex = Texture::create2D(dim.x, dim.y, ResourceFormat::RGBA16Float, 1, 1, nullptr, Resource::BindFlags::RenderTarget | Resource::BindFlags::ShaderResource | Resource::BindFlags::UnorderedAccess);
auto depthTex = Texture::create2D(dim.x, dim.y, ResourceFormat::D24UnormS8, 1, 1, nullptr, Resource::BindFlags::DepthStencil);
mpCausticsFbo[0] = Fbo::create({ pPhotonMapTex }, depthTex);
pPhotonMapTex = Texture::create2D(dim.x, dim.y, ResourceFormat::RGBA16Float, 1, 1, nullptr, Resource::BindFlags::RenderTarget | Resource::BindFlags::ShaderResource | Resource::BindFlags::UnorderedAccess);
mpCausticsFbo[1] = Fbo::create({ pPhotonMapTex }, depthTex);
}
void Caustics::createGBuffer(int width, int height, GBuffer& gbuffer)
{
gbuffer.mpDepthTex = Texture::create2D(width, height, ResourceFormat::D24UnormS8, 1, 1, nullptr, Resource::BindFlags::DepthStencil | Resource::BindFlags::ShaderResource);
gbuffer.mpNormalTex = Texture::create2D(width, height, ResourceFormat::RGBA16Float, 1, 1, nullptr, Resource::BindFlags::RenderTarget | Resource::BindFlags::ShaderResource);
gbuffer.mpDiffuseTex = Texture::create2D(width, height, ResourceFormat::RGBA16Float, 1, 1, nullptr, Resource::BindFlags::RenderTarget | Resource::BindFlags::ShaderResource);
gbuffer.mpSpecularTex = Texture::create2D(width, height, ResourceFormat::RGBA16Float, 1, 1, nullptr, Resource::BindFlags::RenderTarget | Resource::BindFlags::ShaderResource);
gbuffer.mpGPassFbo = Fbo::create({ gbuffer.mpNormalTex , gbuffer.mpDiffuseTex ,gbuffer.mpSpecularTex }, gbuffer.mpDepthTex);//Fbo::create2D(width, height, ResourceFormat::RGBA16Float, ResourceFormat::D24UnormS8);
}
int2 Caustics::getTileDim() const
{
int2 tileDim;
tileDim.x = (mpRtOut->getWidth() / mCausticsMapResRatio + mTileSize.x - 1) / mTileSize.x;
tileDim.y = (mpRtOut->getHeight() / mCausticsMapResRatio + mTileSize.y - 1) / mTileSize.y;
return tileDim;
}
float Caustics::resolutionFactor()
{
float2 res(mpRtOut->getWidth(), mpRtOut->getHeight());
float2 refRes(1920, 1080);
return glm::length(res) / glm::length(refRes);
}
void Caustics::loadShader()
{
// raytrace
RtProgram::Desc rtProgDesc;
rtProgDesc.addShaderLibrary("Caustics.rt.hlsl");
rtProgDesc.setRayGen("rayGen");
rtProgDesc.addHitGroup(0, "primaryClosestHit", "");
rtProgDesc.addMiss(0, "primaryMiss");
rtProgDesc.addHitGroup(1, "", "shadowAnyHit");
rtProgDesc.addMiss(1, "shadowMiss");
mpRaytraceProgram = RtProgram::create(rtProgDesc);
mpRtState = RtState::create();
mpRtState->setProgram(mpRaytraceProgram);
mpRtState->setMaxTraceRecursionDepth(3);
mpRtVars = RtProgramVars::create(mpRaytraceProgram, mpScene);
// clear draw argument program
mpDrawArgumentProgram = ComputeProgram::createFromFile("ResetDrawArgument.cs.hlsl", "main");
mpDrawArgumentState = ComputeState::create();
mpDrawArgumentState->setProgram(mpDrawArgumentProgram);
mpDrawArgumentVars = ComputeVars::create(mpDrawArgumentProgram.get());
// photon trace
mPhotonTraceShaderList.clear();
getPhotonTraceShader();
// composite rt
{
RtProgram::Desc desc;
desc.addShaderLibrary("CompositeRT.rt.hlsl");
desc.setRayGen("rayGen");
desc.addHitGroup(0, "primaryClosestHit", "");
desc.addHitGroup(1, "", "shadowAnyHit").addMiss(1, "shadowMiss");
desc.addMiss(0, "primaryMiss");
desc.addMiss(1, "shadowMiss");
mpCompositeRTProgram = RtProgram::create(desc,48);
mpCompositeRTState = RtState::create();
mpCompositeRTState->setProgram(mpCompositeRTProgram);
mpCompositeRTVars = RtProgramVars::create(mpCompositeRTProgram, mpScene);
}
// update ray density texture
mpUpdateRayDensityProgram = ComputeProgram::createFromFile("UpdateRayDensity.cs.hlsl", "updateRayDensityTex");
mpUpdateRayDensityState = ComputeState::create();
mpUpdateRayDensityState->setProgram(mpUpdateRayDensityProgram);
mpUpdateRayDensityVars = ComputeVars::create(mpUpdateRayDensityProgram.get());
// analyse trace result
mpAnalyseProgram = ComputeProgram::createFromFile("AnalyseTraceResult.cs.hlsl", "addPhotonTaskFromTexture");
mpAnalyseState = ComputeState::create();
mpAnalyseState->setProgram(mpAnalyseProgram);
mpAnalyseVars = ComputeVars::create(mpAnalyseProgram.get());
// generate ray count tex
mpGenerateRayCountProgram = ComputeProgram::createFromFile("GenerateRayCountMipmap.cs.hlsl", "generateMip0");
mpGenerateRayCountState = ComputeState::create();
mpGenerateRayCountState->setProgram(mpGenerateRayCountProgram);
mpGenerateRayCountVars = ComputeVars::create(mpGenerateRayCountProgram.get());
// generate ray count mip tex
mpGenerateRayCountMipProgram = ComputeProgram::createFromFile("GenerateRayCountMipmap.cs.hlsl", "generateMipLevel");
mpGenerateRayCountMipState = ComputeState::create();
mpGenerateRayCountMipState->setProgram(mpGenerateRayCountMipProgram);
mpGenerateRayCountMipVars = ComputeVars::create(mpGenerateRayCountMipProgram.get());
// smooth photon
mpSmoothProgram = ComputeProgram::createFromFile("SmoothPhoton.cs.hlsl", "main");
mpSmoothState = ComputeState::create();
mpSmoothState->setProgram(mpSmoothProgram);
mpSmoothVars = ComputeVars::create(mpSmoothProgram.get());
// allocate tile
const char* shaderEntries[] = { "OrthogonalizePhoton", "CountTilePhoton","AllocateMemory","StoreTilePhoton" };
for (int i = 0; i < GATHER_PROCESSING_SHADER_COUNT; i++)
{
mpAllocateTileProgram[i] = ComputeProgram::createFromFile("AllocateTilePhoton.cs.hlsl", shaderEntries[i]);
mpAllocateTileState[i] = ComputeState::create();
mpAllocateTileState[i]->setProgram(mpAllocateTileProgram[i]);
mpAllocateTileVars[i] = ComputeVars::create(mpAllocateTileProgram[i].get());
}
// photon gather
mpPhotonGatherProgram = ComputeProgram::createFromFile("PhotonGather.cs.hlsl", "main");
mpPhotonGatherState = ComputeState::create();
mpPhotonGatherState->setProgram(mpPhotonGatherProgram);
mpPhotonGatherVars = ComputeVars::create(mpPhotonGatherProgram.get());
// photon scatter
{
BlendState::Desc blendDesc;
blendDesc.setRtBlend(0, true);
blendDesc.setRtParams(0, BlendState::BlendOp::Add, BlendState::BlendOp::Add, BlendState::BlendFunc::One, BlendState::BlendFunc::One, BlendState::BlendFunc::One, BlendState::BlendFunc::One);
BlendState::SharedPtr scatterBlendState = BlendState::create(blendDesc);
mpPhotonScatterProgram = GraphicsProgram::createFromFile("PhotonScatter.ps.hlsl", "photonScatterVS", "photonScatterPS");
DepthStencilState::Desc dsDesc;
dsDesc.setDepthEnabled(false);
dsDesc.setDepthWriteMask(false);
auto depthStencilState = DepthStencilState::create(dsDesc);
RasterizerState::Desc rasterDesc;
rasterDesc.setCullMode(RasterizerState::CullMode::None);
static int32_t depthBias = -8;
static float slopeBias = -16;
rasterDesc.setDepthBias(depthBias, slopeBias);
auto rasterState = RasterizerState::create(rasterDesc);
mpPhotonScatterBlendState = GraphicsState::create();
mpPhotonScatterBlendState->setProgram(mpPhotonScatterProgram);
mpPhotonScatterBlendState->setBlendState(scatterBlendState);
mpPhotonScatterBlendState->setDepthStencilState(depthStencilState);
mpPhotonScatterBlendState->setRasterizerState(rasterState);
mpPhotonScatterNoBlendState = GraphicsState::create();
mpPhotonScatterNoBlendState->setProgram(mpPhotonScatterProgram);
mpPhotonScatterBlendState->setDepthStencilState(depthStencilState);
mpPhotonScatterNoBlendState->setRasterizerState(rasterState);
mpPhotonScatterVars = GraphicsVars::create(mpPhotonScatterProgram->getReflector());
}
// smooth photon
mpFilterProgram = ComputeProgram::createFromFile("TemporalFilter.cs.hlsl", "main");
mpFilterState = ComputeState::create();
mpFilterState->setProgram(mpFilterProgram);
mpFilterVars = ComputeVars::create(mpFilterProgram.get());
mpRtRenderer = RtSceneRenderer::create(mpScene);
mpRasterPass = RasterScenePass::create(mpScene, "Caustics.ps.hlsl", "", "main");
mpGPass = RasterScenePass::create(mpScene, "GPass.ps.hlsl", "", "gpassPS");
mpCompositePass = FullScreenPass::create("Composite.ps.hlsl");
Sampler::Desc samplerDesc;
samplerDesc.setFilterMode(Sampler::Filter::Linear, Sampler::Filter::Linear, Sampler::Filter::Linear);
samplerDesc.setAddressingMode(Sampler::AddressMode::Border, Sampler::AddressMode::Border, Sampler::AddressMode::Border);
mpLinearSampler = Sampler::create(samplerDesc);
samplerDesc.setFilterMode(Sampler::Filter::Point, Sampler::Filter::Point, Sampler::Filter::Point);
mpPointSampler = Sampler::create(samplerDesc);
}
Caustics::Caustics() {}
void Caustics::onLoad(RenderContext* pRenderContext)
{
if (gpDevice->isFeatureSupported(Device::SupportedFeatures::Raytracing) == false)
{
logErrorAndExit("Device does not support raytracing!");
}
loadScene(kDefaultScene, gpFramework->getTargetFbo().get());
loadSceneSetting("Data/init.ini");
loadShader();
}
void Caustics::setCommonVars(GraphicsVars* pVars, const Fbo* pTargetFbo)
{
ConstantBuffer::SharedPtr pCB = pVars->getConstantBuffer("PerFrameCB");
//pCB["invView"] = glm::inverse(mpCamera->getViewMatrix());
//pCB["viewportDims"] = vec2(pTargetFbo->getWidth(), pTargetFbo->getHeight());
//pCB["emitSize"] = mEmitSize;
//float fovY = focalLengthToFovY(mpCamera->getFocalLength(), Camera::kDefaultFrameHeight);
//pCB["tanHalfFovY"] = tanf(fovY * 0.5f);
//pCB["sampleIndex"] = mSampleIndex;
//pCB["useDOF"] = false;// mUseDOF;
}
void Caustics::setPerFrameVars(const Fbo* pTargetFbo)
{
PROFILE("setPerFrameVars");
{
GraphicsVars* pVars = mpRtVars->getGlobalVars().get();
ConstantBuffer::SharedPtr pCB = pVars->getConstantBuffer("PerFrameCB");
pCB["invView"] = glm::inverse(mpCamera->getViewMatrix());
pCB["viewportDims"] = vec2(pTargetFbo->getWidth(), pTargetFbo->getHeight());
float fovY = focalLengthToFovY(mpCamera->getFocalLength(), Camera::kDefaultFrameHeight);
pCB["tanHalfFovY"] = tanf(fovY * 0.5f);
pCB["sampleIndex"] = mSampleIndex;
pCB["useDOF"] = mUseDOF;
}
//setCommonVars(mpRtVars->getGlobalVars().get(), pTargetFbo);
mSampleIndex++;
}
float2 getRandomPoint(int i)
{
const double g = 1.32471795724474602596;
const double a1 = 1.0 / g;
const double a2 = 1.0 / (g * g);
double x = 0.5 + a1 * (i + 1);
double y = 0.5 + a2 * (i + 1);
float xF = float(x - floor(x));
float yF = float(y - floor(y));
return float2(xF, yF);
}
void Caustics::setPhotonTracingCommonVariable(Caustics::PhotonTraceShader& shader)
{
GraphicsVars* pVars = shader.mpPhotonTraceVars->getGlobalVars().get();
ConstantBuffer::SharedPtr pCB = pVars->getConstantBuffer("PerFrameCB");
float2 randomOffset = (getRandomPoint(mFrameCounter) * 2.0f - 1.0f) * mJitter;
pCB["invView"] = glm::inverse(mpCamera->getViewMatrix());
pCB["viewportDims"] = vec2(mpRtOut->getWidth(), mpRtOut->getHeight());
pCB["emitSize"] = mEmitSize;
pCB["roughThreshold"] = mRoughThreshold;
pCB["randomOffset"] = mTemporalFilter ? randomOffset : float2(0,0);
pCB["rayTaskOffset"] = mDispatchSize * mDispatchSize;
pCB["coarseDim"] = uint2(mDispatchSize, mDispatchSize);
pCB["maxDepth"] = mMaxTraceDepth;
pCB["iorOverride"] = mIOROveride;
pCB["colorPhotonID"] = (uint32_t)mColorPhoton;
pCB["photonIDScale"] = mPhotonIDScale;
pCB["traceColorThreshold"] = mTraceColorThreshold * (512 * 512) / (mDispatchSize * mDispatchSize);
pCB["cullColorThreshold"] = mCullColorThreshold / 255;
pCB["gAreaType"] = (uint32_t)mAreaType;
pCB["gIntensity"] = mIntensity / 1000;
pCB["gSplatSize"] = mSplatSize;
pCB["updatePhoton"] = (uint32_t)mUpdatePhoton;
pCB["gMaxScreenRadius"] = mMaxPhotonPixelRadius * resolutionFactor();
pCB["gMipmap"] = int(log(mDispatchSize) / log(2));
auto rayGenVars = shader.mpPhotonTraceVars->getRayGenVars();
rayGenVars->setStructuredBuffer("gPhotonBuffer", mpPhotonBuffer);
rayGenVars->setStructuredBuffer("gRayTask", mpRayTaskBuffer);
rayGenVars->setStructuredBuffer("gRayArgument", mpRayArgumentBuffer);
rayGenVars->setStructuredBuffer("gPixelInfo", mpPixelInfoBuffer);
rayGenVars->setTexture("gUniformNoise", mpUniformNoise);
rayGenVars->setStructuredBuffer("gDrawArgument", mpDrawArgumentBuffer);
rayGenVars->setStructuredBuffer("gRayCountQuadTree", mpRayCountQuadTree);
rayGenVars->setTexture("gRayDensityTex", mpRayDensityTex);
auto hitVars = shader.mpPhotonTraceVars->getHitVars(0);
for (auto& hitVar : hitVars)
{
hitVar->setStructuredBuffer("gPixelInfo", mpPixelInfoBuffer);
hitVar->setStructuredBuffer("gPhotonBuffer", mpPhotonBuffer);
hitVar->setStructuredBuffer("gDrawArgument", mpDrawArgumentBuffer);
hitVar->setStructuredBuffer("gRayTask", mpRayTaskBuffer);
}
shader.mpPhotonTraceState->setMaxTraceRecursionDepth(1);
}
void Caustics::renderRT(RenderContext* pContext, Fbo::SharedPtr pTargetFbo)
{
PROFILE("renderRT");
//setPerFrameVars(pTargetFbo.get());
// reset data
uint32_t statisticsOffset = uint32_t(mFrameCounter % mpPhotonCountTex->getWidth());
int thisIdx = mFrameCounter % 2;
int lastIdx = 1- thisIdx;
GBuffer* gBuffer = mGBuffer + thisIdx;
GBuffer* gBufferLast = mGBuffer + lastIdx;
Fbo::SharedPtr causticsFbo = mpCausticsFbo[thisIdx];
Fbo::SharedPtr causticsFboLast = mpCausticsFbo[lastIdx];
if (mUpdatePhoton)
{
ConstantBuffer::SharedPtr pPerFrameCB = mpDrawArgumentVars["PerFrameCB"];
pPerFrameCB["initRayCount"] = uint(mDispatchSize * mDispatchSize);
pPerFrameCB["coarseDim"] = uint2(mDispatchSize, mDispatchSize);
pPerFrameCB["textureOffset"] = statisticsOffset;
pPerFrameCB["scatterGeoIdxCount"] = mScatterGeometry == SCATTER_GEOMETRY_QUAD ? 6U : 12U;
mpDrawArgumentVars->setStructuredBuffer("gDrawArgument", mpDrawArgumentBuffer);
mpDrawArgumentVars->setStructuredBuffer("gRayArgument", mpRayArgumentBuffer);
//mpDrawArgumentVars->setStructuredBuffer("gPhotonBuffer", mpPhotonBuffer);
mpDrawArgumentVars->setStructuredBuffer("gPixelInfo", mpPixelInfoBuffer);
mpDrawArgumentVars->setTexture("gPhotonCountTexture", mpPhotonCountTex);
pContext->dispatch(mpDrawArgumentState.get(), mpDrawArgumentVars.get(), uvec3(mDispatchSize/16, mDispatchSize / 16, 1));
}
// gpass
{
pContext->clearFbo(gBuffer->mpGPassFbo.get(), vec4(0, 0, 0, 1), 1.0, 0);
mpGPass->renderScene(pContext, gBuffer->mpGPassFbo);
}
// photon tracing
if (mTraceType != TRACE_NONE)
{
auto photonTraceShader = getPhotonTraceShader();
setPhotonTracingCommonVariable(photonTraceShader);
GraphicsVars* pVars = photonTraceShader.mpPhotonTraceVars->getGlobalVars().get();
ConstantBuffer::SharedPtr pCB = pVars->getConstantBuffer("PerFrameCB");
uvec3 resolution = mTraceType == TRACE_FIXED ? uvec3(mDispatchSize, mDispatchSize, 1) : uvec3(2048, 4096, 1);
mpRtRenderer->renderScene(pContext, photonTraceShader.mpPhotonTraceVars, photonTraceShader.mpPhotonTraceState, resolution, mpCamera.get());
}
// analysis output
if ( mUpdatePhoton)
{
if(mTraceType == TRACE_ADAPTIVE || mTraceType == TRACE_ADAPTIVE_RAY_MIP_MAP)
{
ConstantBuffer::SharedPtr pPerFrameCB = mpUpdateRayDensityVars["PerFrameCB"];
pPerFrameCB["coarseDim"] = int2(mDispatchSize, mDispatchSize);
pPerFrameCB["minPhotonPixelSize"] = mMinPhotonPixelSize * resolutionFactor();
pPerFrameCB["smoothWeight"] = mSmoothWeight;
pPerFrameCB["maxTaskPerPixel"] = (int)mMaxTaskCountPerPixel;
pPerFrameCB["updateSpeed"] = mUpdateSpeed;
pPerFrameCB["varianceGain"] = mVarianceGain;
pPerFrameCB["derivativeGain"] = mDerivativeGain;
mpUpdateRayDensityVars->setStructuredBuffer("gPixelInfo", mpPixelInfoBuffer);
mpUpdateRayDensityVars->setStructuredBuffer("gRayArgument", mpRayArgumentBuffer);
mpUpdateRayDensityVars->setTexture("gRayDensityTex", mpRayDensityTex);
static int groupSize = 16;
pContext->dispatch(mpUpdateRayDensityState.get(), mpUpdateRayDensityVars.get(), uvec3(mDispatchSize / groupSize, mDispatchSize / groupSize, 1));
}
if (mTraceType == TRACE_ADAPTIVE)
{
ConstantBuffer::SharedPtr pPerFrameCB = mpAnalyseVars["PerFrameCB"];
glm::mat4 wvp = mpCamera->getProjMatrix() * mpCamera->getViewMatrix();
pPerFrameCB["viewProjMat"] = wvp;// mpCamera->getViewProjMatrix();
pPerFrameCB["taskDim"] = int2(mDispatchSize, mDispatchSize);
pPerFrameCB["screenDim"] = int2(mpRtOut->getWidth(), mpRtOut->getHeight());
pPerFrameCB["normalThreshold"] = mNormalThreshold;
pPerFrameCB["distanceThreshold"] = mDistanceThreshold;
pPerFrameCB["planarThreshold"] = mPlanarThreshold;
pPerFrameCB["samplePlacement"] = (uint32_t)mSamplePlacement;
pPerFrameCB["pixelLuminanceThreshold"] = mPixelLuminanceThreshold;
pPerFrameCB["minPhotonPixelSize"] = mMinPhotonPixelSize * resolutionFactor();
static float2 offset(0.5, 0.5);
static float speed = 0.0f;
pPerFrameCB["randomOffset"] = offset;
offset += speed;
mpAnalyseVars->setStructuredBuffer("gPhotonBuffer", mpPhotonBuffer);
mpAnalyseVars->setStructuredBuffer("gRayArgument", mpRayArgumentBuffer);
mpAnalyseVars->setStructuredBuffer("gRayTask", mpRayTaskBuffer);
mpAnalyseVars->setStructuredBuffer("gPixelInfo", mpPixelInfoBuffer);
mpAnalyseVars->setTexture("gDepthTex", gBuffer->mpGPassFbo->getDepthStencilTexture());
mpAnalyseVars->setTexture("gRayDensityTex", mpRayDensityTex);
int2 groupSize(32, 16);
pContext->dispatch(mpAnalyseState.get(), mpAnalyseVars.get(), uvec3(mDispatchSize / groupSize.x, mDispatchSize / groupSize.y, 1));
}
else if (mTraceType == TRACE_ADAPTIVE_RAY_MIP_MAP)
{
int startMipLevel = int(log(mDispatchSize) / log(2)) - 1;
{
ConstantBuffer::SharedPtr pPerFrameCB = mpGenerateRayCountVars["PerFrameCB"];
pPerFrameCB["taskDim"] = int2(mDispatchSize, mDispatchSize);
pPerFrameCB["screenDim"] = int2(mpRtOut->getWidth(), mpRtOut->getHeight());
pPerFrameCB["mipLevel"] = startMipLevel;
mpGenerateRayCountVars->setStructuredBuffer("gRayArgument", mpRayArgumentBuffer);
mpGenerateRayCountVars->setTexture("gRayDensityTex", mpRayDensityTex);
mpGenerateRayCountVars->setStructuredBuffer("gRayCountQuadTree", mpRayCountQuadTree);
int2 groupSize(8, 8);
uvec3 blockCount(mDispatchSize / groupSize.x / 2, mDispatchSize / groupSize.y / 2, 1);
pContext->dispatch(mpGenerateRayCountState.get(), mpGenerateRayCountVars.get(), blockCount);
}
for (int mipLevel = startMipLevel - 1, dispatchSize = mDispatchSize / 4; mipLevel >= 0; mipLevel--, dispatchSize >>= 1)
{
ConstantBuffer::SharedPtr pPerFrameCB = mpGenerateRayCountMipVars["PerFrameCB"];
pPerFrameCB["taskDim"] = int2(mDispatchSize, mDispatchSize);
pPerFrameCB["screenDim"] = int2(mpRtOut->getWidth(), mpRtOut->getHeight());
pPerFrameCB["mipLevel"] = mipLevel;
mpGenerateRayCountMipVars->setStructuredBuffer("gRayArgument", mpRayArgumentBuffer);
mpGenerateRayCountMipVars->setTexture("gRayDensityTex", mpRayDensityTex);
mpGenerateRayCountMipVars->setStructuredBuffer("gRayCountQuadTree", mpRayCountQuadTree);
int2 groupSize(8, 8);
uvec3 blockCount((dispatchSize + groupSize.x - 1) / groupSize.x, (dispatchSize + groupSize.y - 1) / groupSize.y, 1);
pContext->dispatch(mpGenerateRayCountMipState.get(), mpGenerateRayCountMipVars.get(), blockCount);
}
}
}
// smooth photon
StructuredBuffer::SharedPtr photonBuffer = mpPhotonBuffer;
if (mRemoveIsolatedPhoton || mMedianFilter)
{
ConstantBuffer::SharedPtr pPerFrameCB = mpSmoothVars["PerFrameCB"];
glm::mat4 wvp = mpCamera->getProjMatrix() * mpCamera->getViewMatrix();
pPerFrameCB["viewProjMat"] = wvp;// mpCamera->getViewProjMatrix();
pPerFrameCB["taskDim"] = int2(mDispatchSize, mDispatchSize);
pPerFrameCB["screenDim"] = int2(mpRtOut->getWidth(), mpRtOut->getHeight());
pPerFrameCB["normalThreshold"] = mNormalThreshold;
pPerFrameCB["distanceThreshold"] = mDistanceThreshold;
pPerFrameCB["planarThreshold"] = mPlanarThreshold;
pPerFrameCB["pixelLuminanceThreshold"] = mPixelLuminanceThreshold;
pPerFrameCB["minPhotonPixelSize"] = mMinPhotonPixelSize * resolutionFactor();
pPerFrameCB["trimDirectionThreshold"] = trimDirectionThreshold;
pPerFrameCB["enableMedianFilter"] = uint32_t(mMedianFilter);
pPerFrameCB["removeIsolatedPhoton"] = uint32_t(mRemoveIsolatedPhoton);
pPerFrameCB["minNeighbourCount"] = mMinNeighbourCount;
mpSmoothVars->setStructuredBuffer("gSrcPhotonBuffer", mpPhotonBuffer);
mpSmoothVars->setStructuredBuffer("gDstPhotonBuffer", mpPhotonBuffer2);
mpSmoothVars->setStructuredBuffer("gRayArgument", mpRayArgumentBuffer);
mpSmoothVars->setStructuredBuffer("gRayTask", mpPixelInfoBuffer);
mpSmoothVars->setTexture("gDepthTex", gBuffer->mpGPassFbo->getDepthStencilTexture());
static int groupSize = 16;
pContext->dispatch(mpSmoothState.get(), mpSmoothVars.get(), uvec3(mDispatchSize / groupSize, mDispatchSize / groupSize, 1));
photonBuffer = mpPhotonBuffer2;
}
// photon scattering
if(mScatterOrGather == DENSITY_ESTIMATION_SCATTER)
{
pContext->clearRtv(causticsFbo->getColorTexture(0)->getRTV().get(), vec4(0, 0, 0, 0));
glm::mat4 wvp = mpCamera->getProjMatrix() * mpCamera->getViewMatrix();
glm::mat4 invP = glm::inverse(mpCamera->getProjMatrix());
ConstantBuffer::SharedPtr pPerFrameCB = mpPhotonScatterVars["PerFrameCB"];
pPerFrameCB["gWorldMat"] = glm::mat4();
pPerFrameCB["gWvpMat"] = wvp;
pPerFrameCB["gInvProjMat"] = invP;
pPerFrameCB["gEyePosW"] = mpCamera->getPosition();
pPerFrameCB["gSplatSize"] = mSplatSize;
pPerFrameCB["gPhotonMode"] = (uint)mPhotonMode;
pPerFrameCB["gKernelPower"] = mKernelPower;
pPerFrameCB["gShowPhoton"] = uint32_t(mPhotonDisplayMode);
pPerFrameCB["gLightDir"] = mLightDirection;
pPerFrameCB["taskDim"] = int2(mDispatchSize, mDispatchSize);
pPerFrameCB["screenDim"] = int2(mpRtOut->getWidth(), mpRtOut->getHeight());
pPerFrameCB["normalThreshold"] = mScatterNormalThreshold;
pPerFrameCB["distanceThreshold"] = mScatterDistanceThreshold;
pPerFrameCB["planarThreshold"] = mScatterPlanarThreshold;
pPerFrameCB["gMaxAnisotropy"] = mMaxAnisotropy;
pPerFrameCB["gCameraPos"] = mpCamera->getPosition();
pPerFrameCB["gZTolerance"] = mZTolerance;
pPerFrameCB["gResRatio"] = mCausticsMapResRatio;
mpPhotonScatterVars["gLinearSampler"] = mpLinearSampler;
mpPhotonScatterVars->setStructuredBuffer("gPhotonBuffer", photonBuffer);
mpPhotonScatterVars->setStructuredBuffer("gRayTask", mpPixelInfoBuffer);
mpPhotonScatterVars->setTexture("gDepthTex", gBuffer->mpGPassFbo->getDepthStencilTexture());
mpPhotonScatterVars->setTexture("gNormalTex", gBuffer->mpGPassFbo->getColorTexture(0));
mpPhotonScatterVars->setTexture("gDiffuseTex", gBuffer->mpGPassFbo->getColorTexture(1));
mpPhotonScatterVars->setTexture("gSpecularTex", gBuffer->mpGPassFbo->getColorTexture(2));
mpPhotonScatterVars->setTexture("gGaussianTex", mpGaussianKernel);
int instanceCount = mDispatchSize * mDispatchSize;
GraphicsState::SharedPtr scatterState;
if (mPhotonDisplayMode == 2)
{
scatterState = mpPhotonScatterNoBlendState;
}
else
{
scatterState = mpPhotonScatterBlendState;
}
if (mScatterGeometry == SCATTER_GEOMETRY_QUAD)
scatterState->setVao(mpQuad->getMesh(0)->getVao());
else
scatterState->setVao(mpSphere->getMesh(0)->getVao());
scatterState->setFbo(causticsFbo);
if (mPhotonMode == PHOTON_MODE_PHOTON_MESH)
{
pContext->drawIndexedInstanced(scatterState.get(), mpPhotonScatterVars.get(), 6, mDispatchSize* mDispatchSize, 0, 0, 0);
}
else
{
pContext->drawIndexedIndirect(scatterState.get(), mpPhotonScatterVars.get(), mpDrawArgumentBuffer.get(), 0);
}
}
else if (mScatterOrGather == DENSITY_ESTIMATION_GATHER)
{
int2 tileDim = getTileDim();
int dimX, dimY;
if (mTraceType == TRACE_FIXED)
{
dimX = mDispatchSize;
dimY = mDispatchSize;
}
else
{
int photonCount = MAX_PHOTON_COUNT;
int sqrtCount = int(sqrt(photonCount));
dimX = dimY = sqrtCount;
}
int blockSize = 32;
uvec3 dispatchDim[] = {
uvec3((dimX + blockSize - 1) / blockSize, (dimY + blockSize - 1) / blockSize, 1),
uvec3((dimX + blockSize - 1) / blockSize, (dimY + blockSize - 1) / blockSize, 1),
uvec3((tileDim.x + mTileSize.x - 1) / mTileSize.x,(tileDim.y + mTileSize.y - 1) / mTileSize.y,1),
uvec3((dimX + blockSize - 1) / blockSize, (dimY + blockSize - 1) / blockSize, 1)
};
// build tile data
int2 screenSize(mpRtOut->getWidth() / mCausticsMapResRatio, mpRtOut->getHeight() / mCausticsMapResRatio);
for (int i = 0; i < GATHER_PROCESSING_SHADER_COUNT; i++)
{
auto vars = mpAllocateTileVars[i];
auto states = mpAllocateTileState[i];
ConstantBuffer::SharedPtr pPerFrameCB = vars["PerFrameCB"];
glm::mat4 wvp = mpCamera->getProjMatrix() * mpCamera->getViewMatrix();
pPerFrameCB["gViewProjMat"] = wvp;// mpCamera->getViewProjMatrix();
pPerFrameCB["screenDim"] = screenSize;
pPerFrameCB["tileDim"] = tileDim;
pPerFrameCB["gSplatSize"] = mSplatSize;
pPerFrameCB["minColor"] = mMinGatherColor;
pPerFrameCB["blockCount"] = int2(dispatchDim[i].x, dispatchDim[i].y);
vars->setStructuredBuffer("gDrawArgument", mpDrawArgumentBuffer);
vars->setStructuredBuffer("gPhotonBuffer", photonBuffer);
vars->setStructuredBuffer("gTileInfo", mpTileIDInfoBuffer);
vars->setRawBuffer("gIDBuffer", mpIDBuffer);
vars->setRawBuffer("gIDCounter", mpIDCounterBuffer);
pContext->dispatch(states.get(), vars.get(), dispatchDim[i]);
}
// gathering
ConstantBuffer::SharedPtr pPerFrameCB = mpPhotonGatherVars["PerFrameCB"];
glm::mat4 wvp = mpCamera->getProjMatrix() * mpCamera->getViewMatrix();
pPerFrameCB["gInvViewProjMat"] = mpCamera->getInvViewProjMatrix();
pPerFrameCB["screenDim"] = screenSize;
pPerFrameCB["tileDim"] = tileDim;
pPerFrameCB["gSplatSize"] = mSplatSize;
pPerFrameCB["gDepthRadius"] = mDepthRadius;
pPerFrameCB["gShowTileCount"] = int(mShowTileCount);
pPerFrameCB["gTileCountScale"] = int(mTileCountScale);
pPerFrameCB["gKernelPower"] = mKernelPower;
pPerFrameCB["causticsMapResRatio"] = mCausticsMapResRatio;
mpPhotonGatherVars->setStructuredBuffer("gPhotonBuffer", photonBuffer);
mpPhotonGatherVars->setStructuredBuffer("gTileInfo", mpTileIDInfoBuffer);
mpPhotonGatherVars->setRawBuffer("gIDBuffer", mpIDBuffer);
mpPhotonGatherVars->setTexture("gDepthTex", gBuffer->mpGPassFbo->getDepthStencilTexture());
mpPhotonGatherVars->setTexture("gNormalTex", gBuffer->mpGPassFbo->getColorTexture(0));
mpPhotonGatherVars->setTexture("gPhotonTex", causticsFbo->getColorTexture(0));
uvec3 dispatchSize(
(screenSize.x + mTileSize.x - 1) / mTileSize.x,
(screenSize.y + mTileSize.y - 1) / mTileSize.y, 1);
pContext->dispatch(mpPhotonGatherState.get(), mpPhotonGatherVars.get(), dispatchSize);
}
// Temporal filter
if (mTemporalFilter)
{
static float4x4 lastViewProj;
static float4x4 lastProj;
float4x4 thisViewProj = mpCamera->getViewProjMatrix();
float4x4 thisProj = mpCamera->getProjMatrix();
float4x4 reproj = lastViewProj *glm::inverse(thisViewProj);
int2 causticsDim(causticsFbo->getWidth(), causticsFbo->getHeight());
ConstantBuffer::SharedPtr pPerFrameCB = mpFilterVars["PerFrameCB"];
pPerFrameCB["causticsDim"] = causticsDim;
pPerFrameCB["gBufferDim"] = int2(mpRtOut->getWidth(), mpRtOut->getHeight());
pPerFrameCB["blendWeight"] = mFilterWeight;
pPerFrameCB["reprojMatrix"] = reproj;
pPerFrameCB["invProjMatThis"] = glm::inverse(thisProj);
pPerFrameCB["invProjMatLast"] = glm::inverse(lastProj);
pPerFrameCB["normalKernel"] = mTemporalNormalKernel;