1 files changed, 264 insertions, 0 deletions
diff --git a/NvBlast/tools/AuthoringTool/src/FractureProcessor.cpp b/NvBlast/tools/AuthoringTool/src/FractureProcessor.cpp
new file mode 100644
index 0000000..75307d9
--- /dev/null
+++ b/NvBlast/tools/AuthoringTool/src/FractureProcessor.cpp
@@ -0,0 +1,264 @@
+#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;
+}