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#include "FractureProcessor.h"
#include "NvBlastExtAuthoringCollisionBuilder.h"
#include <iostream>
#include "PxPhysicsAPI.h"
#include "NvBlastTkFramework.h"
#include "NvBlastExtAuthoringFractureTool.h"
#include "SimpleRandomGenerator.h"
#include "NvBlastExtAuthoringBondGenerator.h"
#include "NvBlastTypes.h"
#include "NvBlastIndexFns.h"
#include "NvBlast.h"
#include <ctime>
using namespace Nv::Blast;
void loggingCallback(int type, const char* msg, const char* file, int line)
{
(void)type;
std::cout << msg << " FILE:" << file << " Line: " << line << "\n";
}
FractureProcessor::FractureProcessor()
{
initPhysX();
Nv::Blast::TkFrameworkDesc frameworkDesc =
{
&g_errorCallback,
&g_allocator
};
framework = NvBlastTkFrameworkCreate(frameworkDesc);
if (framework == nullptr)
{
std::cout << "Failed to create TkFramework" << std::endl;
return;
}
}
FractureProcessor::~FractureProcessor()
{
releasePhysX();
if (framework != nullptr)
{
framework->release();
}
}
void FractureProcessor::buildPhysicsChunks(const std::vector<std::vector<Nv::Blast::Triangle>>& chunkGeometry, std::vector<Nv::Blast::ExtPxAssetDesc::ChunkDesc>& outPhysicsChunks, std::vector<Nv::Blast::ExtPxAssetDesc::SubchunkDesc>& outPhysicsSubchunks)
{
Nv::Blast::ConvexMeshBuilder collisionBuilder(cooking, &physics->getPhysicsInsertionCallback());
outPhysicsChunks.resize(chunkGeometry.size());
outPhysicsSubchunks.resize(chunkGeometry.size());
for (uint32_t i = 0; i < chunkGeometry.size(); ++i)
{
std::vector<physx::PxVec3> vertices;
for (uint32_t p = 0; p < chunkGeometry[i].size(); ++p)
{
vertices.push_back(chunkGeometry[i][p].a.p);
vertices.push_back(chunkGeometry[i][p].b.p);
vertices.push_back(chunkGeometry[i][p].c.p);
}
outPhysicsSubchunks[i].transform = physx::PxTransform(physx::PxIdentity);
outPhysicsSubchunks[i].geometry = physx::PxConvexMeshGeometry(collisionBuilder.buildConvexMesh(vertices));
outPhysicsChunks[i].isStatic = false;
outPhysicsChunks[i].subchunkCount = 1;
outPhysicsChunks[i].subchunks = &outPhysicsSubchunks[i];
}
}
std::shared_ptr<FractureResult> FractureProcessor::fractureMesh(std::shared_ptr<Nv::Blast::Mesh> sourceMesh, const FractureSettings &settings)
{
// Create FractureTool
std::cout << "Fracture tool initialization" << std::endl;
std::vector<NvBlastChunkDesc> chunkDesc;
std::vector<NvBlastBondDesc> bondDescs;
std::vector<std::vector<Nv::Blast::Triangle> > chunkMeshes;
std::vector<bool> isSupport;
Nv::Blast::FractureTool fTool(loggingCallback);
fTool.setSourceMesh(sourceMesh.get());
SimpleRandomGenerator rnd;
rnd.seed((int32_t)time(nullptr)); // Keep the same seed to have reproducible results.
std::cout << "Fracturing..." << std::endl;
VoronoiSitesGenerator stGenerator(sourceMesh.get(), &rnd);
switch (settings.mode)
{
case 'c':
stGenerator.clusteredSitesGeneration(settings.clusterCount, settings.cellsCount, settings.clusterRadius);
fTool.voronoiFracturing(0, stGenerator.getVoronoiSites(), false);
break;
case 's':
{
SlicingConfiguration slConfig;
slConfig.x_slices = settings.slicingX;
slConfig.y_slices = settings.slicingY;
slConfig.z_slices = settings.slicingZ;
slConfig.angle_variations = settings.angleVariation;
slConfig.offset_variations = settings.offsetVariation;
fTool.slicing(0, slConfig, false, &rnd);
break;
}
case 'v':
stGenerator.uniformlyGenerateSitesInMesh(settings.cellsCount);
fTool.voronoiFracturing(0, stGenerator.getVoronoiSites(), false);
break;
default:
std::cout << "Not supported mode" << std::endl;
return nullptr;
}
std::cout << "Creating geometry" << std::endl;
fTool.finalizeFracturing();
chunkMeshes.resize(fTool.getChunkList().size());
isSupport.resize(fTool.getChunkList().size());
for (uint32_t i = 0; i < fTool.getChunkList().size(); ++i)
{
fTool.getBaseMesh(i, chunkMeshes[i]);
isSupport[i] = fTool.getChunkList()[i].isLeaf;
}
BlastBondGenerator bondGenerator(cooking, &physics->getPhysicsInsertionCallback());
BondGenerationConfig cnf;
cnf.bondMode = BondGenerationConfig::EXACT;
bondGenerator.buildDescFromInternalFracture(&fTool, isSupport, bondDescs, chunkDesc);
// const uint32_t chunkCount = static_cast<uint32_t>(chunkDesc.size());
const uint32_t bondCount = static_cast<uint32_t>(bondDescs.size());
if (bondCount == 0)
{
std::cout << "Can't create bonds descriptors..." << std::endl;
return nullptr;
}
return finalizeMeshProcessing(chunkDesc, bondDescs, chunkMeshes);
}
std::shared_ptr<FractureResult> FractureProcessor::finalizeMeshProcessing(std::vector<NvBlastChunkDesc> chunkDesc, std::vector<NvBlastBondDesc> bondDescs, std::vector<std::vector<Nv::Blast::Triangle> > chunkMeshes)
{
const uint32_t chunkCount = static_cast<uint32_t>(chunkDesc.size());
const uint32_t bondCount = static_cast<uint32_t>(bondDescs.size());
// order chunks, build map
std::vector<uint32_t> chunkReorderInvMap;
{
std::vector<uint32_t> chunkReorderMap(chunkCount);
std::vector<char> scratch(chunkCount * sizeof(NvBlastChunkDesc));
NvBlastEnsureAssetExactSupportCoverage(chunkDesc.data(), chunkCount, scratch.data(), loggingCallback);
NvBlastBuildAssetDescChunkReorderMap(chunkReorderMap.data(), chunkDesc.data(), chunkCount, scratch.data(), loggingCallback);
NvBlastApplyAssetDescChunkReorderMapInplace(chunkDesc.data(), chunkCount, bondDescs.data(), bondCount, chunkReorderMap.data(), scratch.data(), loggingCallback);
chunkReorderInvMap.resize(chunkReorderMap.size());
Nv::Blast::invertMap(chunkReorderInvMap.data(), chunkReorderMap.data(), static_cast<unsigned int>(chunkReorderMap.size()));
}
std::shared_ptr<FractureResult> result = std::make_shared<FractureResult>();
// get result geometry
result->resultGeometry.resize(chunkMeshes.size());
//std::vector<std::vector<Triangle>> resultGeometry(chunkMeshes.size());
for (uint32_t i = 0; i < chunkMeshes.size(); ++i)
{
uint32_t chunkIndex = chunkReorderInvMap[i];
result->resultGeometry[i] = chunkMeshes[chunkIndex];
}
float maxX = INT32_MIN;
float maxY = INT32_MIN;
float maxZ = INT32_MIN;
float minX = INT32_MAX;
float minY = INT32_MAX;
float minZ = INT32_MAX;
for (uint32_t i = 0; i < bondDescs.size(); i++)
{
NvBlastBondDesc bondDesc = bondDescs[i];
minX = std::min(minX, bondDesc.bond.centroid[0]);
maxX = std::max(maxX, bondDesc.bond.centroid[0]);
minY = std::min(minY, bondDesc.bond.centroid[1]);
maxY = std::max(maxY, bondDesc.bond.centroid[1]);
minZ = std::min(minZ, bondDesc.bond.centroid[2]);
maxZ = std::max(maxZ, bondDesc.bond.centroid[2]);
}
std::cout << "Bond bounds: " << std::endl;
std::cout << "MIN: " << minX << ", " << minY << ", " << minZ << std::endl;
std::cout << "MAX: " << maxX << ", " << maxY << ", " << maxZ << std::endl;
// prepare physics data (convexes)
std::vector<Nv::Blast::ExtPxAssetDesc::ChunkDesc> physicsChunks(chunkCount);
std::vector<Nv::Blast::ExtPxAssetDesc::SubchunkDesc> physicsSubchunks;
buildPhysicsChunks(result->resultGeometry, physicsChunks, physicsSubchunks);
// build and serialize ExtPhysicsAsset
Nv::Blast::ExtPxAssetDesc descriptor;
descriptor.bondCount = bondCount;
descriptor.bondDescs = bondDescs.data();
descriptor.chunkCount = chunkCount;
descriptor.chunkDescs = chunkDesc.data();
descriptor.bondFlags = nullptr;
descriptor.pxChunks = physicsChunks.data();
result->resultPhysicsAsset = std::shared_ptr<Nv::Blast::ExtPxAsset>(Nv::Blast::ExtPxAsset::create(descriptor, *framework), [=](Nv::Blast::ExtPxAsset* asset)
{
asset->release();
});
std::cout << "Done" << std::endl;
return result;
}
bool FractureProcessor::initPhysX()
{
foundation = PxCreateFoundation(PX_FOUNDATION_VERSION, g_allocator, g_errorCallback);
if (!foundation)
{
std::cout << "Can't init PhysX foundation" << std::endl;
return false;
}
physx::PxTolerancesScale scale;
physics = PxCreatePhysics(PX_PHYSICS_VERSION, *foundation, scale, true);
if (!physics)
{
std::cout << "Can't create Physics" << std::endl;
return false;
}
physx::PxCookingParams cookingParams(scale);
cookingParams.buildGPUData = true;
cooking = PxCreateCooking(PX_PHYSICS_VERSION, physics->getFoundation(), cookingParams);
if (!cooking)
{
std::cout << "Can't create Cooking" << std::endl;
return false;
}
return true;
}
void FractureProcessor::releasePhysX()
{
cooking->release();
cooking = 0;
physics->release();
physics = 0;
foundation->release();
foundation = 0;
}
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