virtual bool CookConvex(FName Format, const TArray<FVector>& SrcBuffer, TArray<uint8>& OutBuffer, bool bDeformableMesh = false) const override
{
#if WITH_PHYSX
PxPlatform::Enum PhysXFormat = PxPlatform::ePC;
bool bIsPhysXFormatValid = GetPhysXFormat(Format, PhysXFormat);
check(bIsPhysXFormatValid);
PxConvexMeshDesc PConvexMeshDesc;
PConvexMeshDesc.points.data = SrcBuffer.GetData();
PConvexMeshDesc.points.count = SrcBuffer.Num();
PConvexMeshDesc.points.stride = sizeof(FVector);
if (bDeformableMesh)
{
PConvexMeshDesc.flags = PxConvexFlag::eCOMPUTE_CONVEX | PxConvexFlag::eINFLATE_CONVEX;
}
else
{
PConvexMeshDesc.flags = PxConvexFlag::eCOMPUTE_CONVEX;
}
// Set up cooking
const PxCookingParams Params = PhysXCooking->getParams();
PxCookingParams NewParams = Params;
NewParams.targetPlatform = PhysXFormat;
if (bDeformableMesh)
{
// Meshes which can be deformed need different cooking parameters to inhibit vertex welding and add an extra skin around the collision mesh for safety.
// We need to set the meshWeldTolerance to zero, even when disabling 'clean mesh' as PhysX will attempt to perform mesh cleaning anyway according to this meshWeldTolerance
// if the convex hull is not well formed.
// Set the skin thickness as a proportion of the overall size of the mesh as PhysX's internal tolerances also use the overall size to calculate the epsilon used.
const FBox Bounds(SrcBuffer);
const float MaxExtent = (Bounds.Max - Bounds.Min).Size();
NewParams.skinWidth = MaxExtent / 512.0f;
NewParams.meshPreprocessParams = PxMeshPreprocessingFlags(PxMeshPreprocessingFlag::eDISABLE_CLEAN_MESH);
NewParams.areaTestEpsilon = 0.0f;
NewParams.meshWeldTolerance = 0.0f;
PhysXCooking->setParams(NewParams);
}
// Cook the convex mesh to a temp buffer
TArray<uint8> CookedMeshBuffer;
FPhysXOutputStream Buffer(&CookedMeshBuffer);
bool Result = PhysXCooking->cookConvexMesh(PConvexMeshDesc, Buffer);
// Return default cooking params to normal
if (bDeformableMesh)
{
PhysXCooking->setParams(Params);
}
if( Result && CookedMeshBuffer.Num() > 0 )
{
// Append the cooked data into cooked buffer
OutBuffer.Append( CookedMeshBuffer );
return true;
}
#endif // WITH_PHYSX
return false;
}
//////// GAME-LEVEL RIGID BODY PHYSICS STUFF ///////
void InitGamePhys()
{
#if WITH_BOX2D
FPhysicsIntegration2D::InitializePhysics();
#endif
#if WITH_PHYSX
// Do nothing if SDK already exists
if(GPhysXFoundation != NULL)
{
return;
}
// Make sure
LoadPhysXModules();
// Create Foundation
GPhysXAllocator = new FPhysXAllocator();
FPhysXErrorCallback* ErrorCallback = new FPhysXErrorCallback();
GPhysXFoundation = PxCreateFoundation(PX_PHYSICS_VERSION, *GPhysXAllocator, *ErrorCallback);
check(GPhysXFoundation);
#if PHYSX_MEMORY_STATS
// Want names of PhysX allocations
GPhysXFoundation->setReportAllocationNames(true);
#endif
// Create profile manager
GPhysXProfileZoneManager = &PxProfileZoneManager::createProfileZoneManager(GPhysXFoundation);
check(GPhysXProfileZoneManager);
// Create Physics
PxTolerancesScale PScale;
PScale.length = CVarToleranceScaleLength.GetValueOnGameThread();
PScale.mass = CVarTolerenceScaleMass.GetValueOnGameThread();
PScale.speed = CVarToleranceScaleSpeed.GetValueOnGameThread();
GPhysXSDK = PxCreatePhysics(PX_PHYSICS_VERSION, *GPhysXFoundation, PScale, false, GPhysXProfileZoneManager);
check(GPhysXSDK);
GPhysCommandHandler = new FPhysCommandHandler();
FCoreUObjectDelegates::PreGarbageCollect.AddRaw(GPhysCommandHandler, &FPhysCommandHandler::Flush);
// Init Extensions
PxInitExtensions(*GPhysXSDK);
#if WITH_VEHICLE
PxInitVehicleSDK(*GPhysXSDK);
#endif
//Turn on PhysX 3.3 unified height field collision detection.
//This approach shares the collision detection code between meshes and height fields such that height fields behave identically to the equivalent terrain created as a mesh.
//This approach facilitates mixing the use of height fields and meshes in the application with no tangible difference in collision behavior between the two approaches
PxRegisterUnifiedHeightFields(*GPhysXSDK);
#if WITH_PHYSICS_COOKING || WITH_RUNTIME_PHYSICS_COOKING
// Create Cooking
PxCookingParams PCookingParams(PScale);
PCookingParams.meshWeldTolerance = 0.1f; // Weld to 1mm precision
PCookingParams.meshPreprocessParams = PxMeshPreprocessingFlags(PxMeshPreprocessingFlag::eWELD_VERTICES | PxMeshPreprocessingFlag::eREMOVE_UNREFERENCED_VERTICES | PxMeshPreprocessingFlag::eREMOVE_DUPLICATED_TRIANGLES);
PCookingParams.targetPlatform = PxPlatform::ePC;
//PCookingParams.meshCookingHint = PxMeshCookingHint::eCOOKING_PERFORMANCE;
//PCookingParams.meshSizePerformanceTradeOff = 0.0f;
GPhysXCooking = PxCreateCooking(PX_PHYSICS_VERSION, *GPhysXFoundation, PCookingParams);
check(GPhysXCooking);
#endif
#if WITH_APEX
// Build the descriptor for the APEX SDK
NxApexSDKDesc ApexDesc;
ApexDesc.physXSDK = GPhysXSDK; // Pointer to the PhysXSDK
ApexDesc.cooking = GPhysXCooking; // Pointer to the cooking library
ApexDesc.renderResourceManager = &GApexNullRenderResourceManager; // We will not be using the APEX rendering API, so just use a dummy render resource manager
ApexDesc.resourceCallback = &GApexResourceCallback; // The resource callback is how APEX asks the application to find assets when it needs them
// Create the APEX SDK
NxApexCreateError ErrorCode;
GApexSDK = NxCreateApexSDK(ApexDesc, &ErrorCode);
check(ErrorCode == APEX_CE_NO_ERROR);
check(GApexSDK);
#if APEX_STATICALLY_LINKED
// We need to instantiate the module if we have statically linked them
// Otherwise all createModule functions will fail
instantiateModuleDestructible();
#if WITH_APEX_CLOTHING
instantiateModuleClothing();
#endif
#if WITH_APEX_LEGACY
instantiateModuleLegacy();
#endif
#endif
// 1 legacy module for all in APEX 1.3
// Load the only 1 legacy module
#if WITH_APEX_LEGACY
GApexModuleLegacy = GApexSDK->createModule("Legacy");
check(GApexModuleLegacy);
#endif // WITH_APEX_LEGACY
// Load APEX Destruction module
GApexModuleDestructible = static_cast<NxModuleDestructible*>(GApexSDK->createModule("Destructible"));
check(GApexModuleDestructible);
// Set Destructible module parameters
NxParameterized::Interface* ModuleParams = GApexModuleDestructible->getDefaultModuleDesc();
// ModuleParams contains the default module descriptor, which may be modified here before calling the module init function
GApexModuleDestructible->init(*ModuleParams);
// Disabling dynamic LOD
GApexModuleDestructible->setLODEnabled(false);
// Set chunk report for fracture effect callbacks
GApexModuleDestructible->setChunkReport(&GApexChunkReport);
GApexModuleDestructible->setMaxDynamicChunkIslandCount((physx::PxU32)FMath::Max(CVarAPEXMaxDestructibleDynamicChunkIslandCount.GetValueOnGameThread(), 0));
GApexModuleDestructible->setMaxChunkCount((physx::PxU32)FMath::Max(CVarAPEXMaxDestructibleDynamicChunkCount.GetValueOnGameThread(), 0));
GApexModuleDestructible->setSortByBenefit(CVarAPEXSortDynamicChunksByBenefit.GetValueOnGameThread() != 0);
GApexModuleDestructible->setChunkReportSendChunkStateEvents(true);
// APEX 1.3 to preserve 1.2 behavior
GApexModuleDestructible->setUseLegacyDamageRadiusSpread(true);
GApexModuleDestructible->setUseLegacyChunkBoundsTesting(true);
#if WITH_APEX_CLOTHING
// Load APEX Clothing module
GApexModuleClothing = static_cast<NxModuleClothing*>(GApexSDK->createModule("Clothing"));
check(GApexModuleClothing);
// Set Clothing module parameters
ModuleParams = GApexModuleClothing->getDefaultModuleDesc();
// Can be tuned for switching between more memory and more spikes.
NxParameterized::setParamU32(*ModuleParams, "maxUnusedPhysXResources", 5);
// If true, let fetch results tasks run longer than the fetchResults call.
// Setting to true could not ensure same finish timing with Physx simulation phase
NxParameterized::setParamBool(*ModuleParams, "asyncFetchResults", false);
// ModuleParams contains the default module descriptor, which may be modified here before calling the module init function
GApexModuleClothing->init(*ModuleParams);
#endif //WITH_APEX_CLOTHING
#endif // #if WITH_APEX
#endif // WITH_PHYSX
}
//////// GAME-LEVEL RIGID BODY PHYSICS STUFF ///////
void InitGamePhys()
{
#if WITH_BOX2D
FPhysicsIntegration2D::InitializePhysics();
#endif
#if WITH_PHYSX
// Do nothing if SDK already exists
if(GPhysXFoundation != NULL)
{
return;
}
// Make sure
LoadPhysXModules();
// Create Foundation
GPhysXAllocator = new FPhysXAllocator();
FPhysXErrorCallback* ErrorCallback = new FPhysXErrorCallback();
GPhysXFoundation = PxCreateFoundation(PX_FOUNDATION_VERSION, *GPhysXAllocator, *ErrorCallback);
check(GPhysXFoundation);
#if PHYSX_MEMORY_STATS
// Want names of PhysX allocations
GPhysXFoundation->setReportAllocationNames(true);
#endif
// Create profile manager
GPhysXVisualDebugger = PxCreatePvd(*GPhysXFoundation);
check(GPhysXVisualDebugger);
// Create Physics
PxTolerancesScale PScale;
PScale.length = CVarToleranceScaleLength.GetValueOnGameThread();
PScale.speed = CVarToleranceScaleSpeed.GetValueOnGameThread();
GPhysXSDK = PxCreatePhysics(PX_PHYSICS_VERSION, *GPhysXFoundation, PScale, false, GPhysXVisualDebugger);
check(GPhysXSDK);
FPhysxSharedData::Initialize();
GPhysCommandHandler = new FPhysCommandHandler();
GPreGarbageCollectDelegateHandle = FCoreUObjectDelegates::PreGarbageCollect.AddRaw(GPhysCommandHandler, &FPhysCommandHandler::Flush);
// Init Extensions
PxInitExtensions(*GPhysXSDK, GPhysXVisualDebugger);
#if WITH_VEHICLE
PxInitVehicleSDK(*GPhysXSDK);
#endif
if (CVarUseUnifiedHeightfield.GetValueOnGameThread())
{
//Turn on PhysX 3.3 unified height field collision detection.
//This approach shares the collision detection code between meshes and height fields such that height fields behave identically to the equivalent terrain created as a mesh.
//This approach facilitates mixing the use of height fields and meshes in the application with no tangible difference in collision behavior between the two approaches except that
//heightfield thickness is not supported for unified heightfields.
PxRegisterUnifiedHeightFields(*GPhysXSDK);
}
else
{
PxRegisterHeightFields(*GPhysXSDK);
}
if( FParse::Param( FCommandLine::Get(), TEXT( "PVD" ) ) )
{
PvdConnect(TEXT("localhost"), true);
}
#if WITH_PHYSICS_COOKING || WITH_RUNTIME_PHYSICS_COOKING
// Create Cooking
PxCookingParams PCookingParams(PScale);
PCookingParams.meshWeldTolerance = 0.1f; // Weld to 1mm precision
PCookingParams.meshPreprocessParams = PxMeshPreprocessingFlags(PxMeshPreprocessingFlag::eWELD_VERTICES);
// Force any cooking in PhysX or APEX to use older incremental hull method
// This is because the new 'quick hull' method can generate degenerate geometry in some cases (very thin meshes etc.)
//PCookingParams.convexMeshCookingType = PxConvexMeshCookingType::eINFLATION_INCREMENTAL_HULL;
PCookingParams.targetPlatform = PxPlatform::ePC;
//PCookingParams.meshCookingHint = PxMeshCookingHint::eCOOKING_PERFORMANCE;
//PCookingParams.meshSizePerformanceTradeOff = 0.0f;
GPhysXCooking = PxCreateCooking(PX_PHYSICS_VERSION, *GPhysXFoundation, PCookingParams);
check(GPhysXCooking);
#endif
#if WITH_APEX
// Build the descriptor for the APEX SDK
apex::ApexSDKDesc ApexDesc;
ApexDesc.foundation = GPhysXFoundation; // Pointer to the PxFoundation
ApexDesc.physXSDK = GPhysXSDK; // Pointer to the PhysXSDK
ApexDesc.cooking = GPhysXCooking; // Pointer to the cooking library
ApexDesc.renderResourceManager = &GApexNullRenderResourceManager; // We will not be using the APEX rendering API, so just use a dummy render resource manager
ApexDesc.resourceCallback = &GApexResourceCallback; // The resource callback is how APEX asks the application to find assets when it needs them
#if PLATFORM_MAC
FString DylibFolder = FPaths::EngineDir() / TEXT("Binaries/ThirdParty/PhysX/");
ANSICHAR* DLLLoadPath = (ANSICHAR*)FMemory::Malloc(DylibFolder.Len() + 1);
FCStringAnsi::Strcpy(DLLLoadPath, DylibFolder.Len() + 1, TCHAR_TO_UTF8(*DylibFolder));
ApexDesc.dllLoadPath = DLLLoadPath;
#endif
// Create the APEX SDK
apex::ApexCreateError ErrorCode;
GApexSDK = apex::CreateApexSDK(ApexDesc, &ErrorCode);
check(ErrorCode == APEX_CE_NO_ERROR);
check(GApexSDK);
#if PLATFORM_MAC
FMemory::Free(DLLLoadPath);
#endif
#if UE_BUILD_SHIPPING
GApexSDK->setEnableApexStats(false);
#endif
#if APEX_STATICALLY_LINKED
// We need to instantiate the module if we have statically linked them
// Otherwise all createModule functions will fail
instantiateModuleDestructible();
#if WITH_APEX_CLOTHING
instantiateModuleClothing();
#endif
#if WITH_APEX_LEGACY
instantiateModuleLegacy();
#endif
#endif
// 1 legacy module for all in APEX 1.3
// Load the only 1 legacy module
#if WITH_APEX_LEGACY
GApexModuleLegacy = GApexSDK->createModule("Legacy");
check(GApexModuleLegacy);
#endif // WITH_APEX_LEGACY
// Load APEX Destruction module
GApexModuleDestructible = static_cast<apex::ModuleDestructible*>(GApexSDK->createModule("Destructible"));
check(GApexModuleDestructible);
// Set Destructible module parameters
NvParameterized::Interface* ModuleParams = GApexModuleDestructible->getDefaultModuleDesc();
// ModuleParams contains the default module descriptor, which may be modified here before calling the module init function
GApexModuleDestructible->init(*ModuleParams);
// Set chunk report for fracture effect callbacks
GApexModuleDestructible->setChunkReport(&GApexChunkReport);
GApexModuleDestructible->setMaxDynamicChunkIslandCount((physx::PxU32)FMath::Max(CVarAPEXMaxDestructibleDynamicChunkIslandCount.GetValueOnGameThread(), 0));
GApexModuleDestructible->setMaxChunkCount((physx::PxU32)FMath::Max(CVarAPEXMaxDestructibleDynamicChunkCount.GetValueOnGameThread(), 0));
GApexModuleDestructible->setSortByBenefit(CVarAPEXSortDynamicChunksByBenefit.GetValueOnGameThread() != 0);
GApexModuleDestructible->scheduleChunkStateEventCallback(apex::DestructibleCallbackSchedule::FetchResults);
// APEX 1.3 to preserve 1.2 behavior
GApexModuleDestructible->setUseLegacyDamageRadiusSpread(true);
GApexModuleDestructible->setUseLegacyChunkBoundsTesting(true);
#if WITH_APEX_CLOTHING
// Load APEX Clothing module
GApexModuleClothing = static_cast<apex::ModuleClothing*>(GApexSDK->createModule("Clothing"));
check(GApexModuleClothing);
// Set Clothing module parameters
ModuleParams = GApexModuleClothing->getDefaultModuleDesc();
// Can be tuned for switching between more memory and more spikes.
NvParameterized::setParamU32(*ModuleParams, "maxUnusedPhysXResources", 5);
// If true, let fetch results tasks run longer than the fetchResults call.
// Setting to true could not ensure same finish timing with Physx simulation phase
NvParameterized::setParamBool(*ModuleParams, "asyncFetchResults", false);
// ModuleParams contains the default module descriptor, which may be modified here before calling the module init function
GApexModuleClothing->init(*ModuleParams);
#endif //WITH_APEX_CLOTHING
#endif // #if WITH_APEX
#endif // WITH_PHYSX
}
virtual EPhysXCookingResult CookConvex(FName Format, int32 RuntimeCookFlags, const TArray<FVector>& SrcBuffer, TArray<uint8>& OutBuffer, bool bDeformableMesh = false) const override
{
EPhysXCookingResult CookResult = EPhysXCookingResult::Failed;
#if WITH_PHYSX
PxPlatform::Enum PhysXFormat = PxPlatform::ePC;
bool bIsPhysXFormatValid = GetPhysXFormat(Format, PhysXFormat);
check(bIsPhysXFormatValid);
PxConvexMeshDesc PConvexMeshDesc;
PConvexMeshDesc.points.data = SrcBuffer.GetData();
PConvexMeshDesc.points.count = SrcBuffer.Num();
PConvexMeshDesc.points.stride = sizeof(FVector);
PConvexMeshDesc.flags = PxConvexFlag::eCOMPUTE_CONVEX;
// Set up cooking
const PxCookingParams Params = PhysXCooking->getParams();
PxCookingParams NewParams = Params;
NewParams.targetPlatform = PhysXFormat;
if(RuntimeCookFlags & ERuntimePhysxCookOptimizationFlags::SuppressFaceRemapTable)
{
NewParams.suppressTriangleMeshRemapTable = true;
}
if (bDeformableMesh)
{
// Meshes which can be deformed need different cooking parameters to inhibit vertex welding and add an extra skin around the collision mesh for safety.
// We need to set the meshWeldTolerance to zero, even when disabling 'clean mesh' as PhysX will attempt to perform mesh cleaning anyway according to this meshWeldTolerance
// if the convex hull is not well formed.
// Set the skin thickness as a proportion of the overall size of the mesh as PhysX's internal tolerances also use the overall size to calculate the epsilon used.
const FBox Bounds(SrcBuffer);
const float MaxExtent = (Bounds.Max - Bounds.Min).Size();
NewParams.meshPreprocessParams = PxMeshPreprocessingFlags(PxMeshPreprocessingFlag::eDISABLE_CLEAN_MESH);
NewParams.meshWeldTolerance = 0.0f;
}
PhysXCooking->setParams(NewParams);
// Cook the convex mesh to a temp buffer
TArray<uint8> CookedMeshBuffer;
FPhysXOutputStream Buffer(&CookedMeshBuffer);
if (PhysXCooking->cookConvexMesh(PConvexMeshDesc, Buffer))
{
CookResult = EPhysXCookingResult::Succeeded;
}
else
{
if (!(PConvexMeshDesc.flags & PxConvexFlag::eINFLATE_CONVEX))
{
// We failed to cook without inflating convex. Let's try again with inflation
//This is not ideal since it makes the collision less accurate. It's needed if given verts are extremely close.
PConvexMeshDesc.flags |= PxConvexFlag::eINFLATE_CONVEX;
if (PhysXCooking->cookConvexMesh(PConvexMeshDesc, Buffer))
{
CookResult = EPhysXCookingResult::SucceededWithInflation;
}
}
}
// Return default cooking params to normal
if (bDeformableMesh)
{
PhysXCooking->setParams(Params);
}
if (CookedMeshBuffer.Num() == 0)
{
CookResult = EPhysXCookingResult::Failed;
}
if (CookResult != EPhysXCookingResult::Failed)
{
// Append the cooked data into cooked buffer
OutBuffer.Append( CookedMeshBuffer );
}
#endif // WITH_PHYSX
return CookResult;
}
