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;
}
virtual bool CookTriMesh(FName Format, int32 RuntimeCookFlags, const TArray<FVector>& SrcVertices, const TArray<FTriIndices>& SrcIndices, const TArray<uint16>& SrcMaterialIndices, const bool FlipNormals, TArray<uint8>& OutBuffer, bool bDeformableMesh = false) const override
{
#if WITH_PHYSX
PxPlatform::Enum PhysXFormat = PxPlatform::ePC;
bool bIsPhysXFormatValid = GetPhysXFormat(Format, PhysXFormat);
check(bIsPhysXFormatValid);
PxTriangleMeshDesc PTriMeshDesc;
PTriMeshDesc.points.data = SrcVertices.GetData();
PTriMeshDesc.points.count = SrcVertices.Num();
PTriMeshDesc.points.stride = sizeof(FVector);
PTriMeshDesc.triangles.data = SrcIndices.GetData();
PTriMeshDesc.triangles.count = SrcIndices.Num();
PTriMeshDesc.triangles.stride = sizeof(FTriIndices);
PTriMeshDesc.materialIndices.data = SrcMaterialIndices.GetData();
PTriMeshDesc.materialIndices.stride = sizeof(PxMaterialTableIndex);
PTriMeshDesc.flags = FlipNormals ? PxMeshFlag::eFLIPNORMALS : (PxMeshFlags)0;
// Set up cooking
const PxCookingParams& Params = PhysXCooking->getParams();
PxCookingParams NewParams = Params;
NewParams.targetPlatform = PhysXFormat;
PxMeshPreprocessingFlags OldCookingFlags = NewParams.meshPreprocessParams;
if (RuntimeCookFlags & ERuntimePhysxCookOptimizationFlags::SuppressFaceRemapTable)
{
NewParams.suppressTriangleMeshRemapTable = true;
}
if (bDeformableMesh)
{
// In the case of a deformable mesh, we have to change the cook params
NewParams.meshPreprocessParams = PxMeshPreprocessingFlag::eDISABLE_CLEAN_MESH;
}
PhysXCooking->setParams(NewParams);
// Cook TriMesh Data
FPhysXOutputStream Buffer(&OutBuffer);
bool Result = PhysXCooking->cookTriangleMesh(PTriMeshDesc, Buffer);
if (bDeformableMesh) //restore old params
{
NewParams.meshPreprocessParams = OldCookingFlags;
PhysXCooking->setParams(NewParams);
}
return Result;
#else
return false;
#endif // WITH_PHYSX
}
virtual bool CookHeightField(FName Format, FIntPoint HFSize, float Thickness, const void* Samples, uint32 SamplesStride, TArray<uint8>& OutBuffer) const override
{
#if WITH_PHYSX
PxPlatform::Enum PhysXFormat = PxPlatform::ePC;
bool bIsPhysXFormatValid = GetPhysXFormat(Format, PhysXFormat);
check(bIsPhysXFormatValid);
PxHeightFieldDesc HFDesc;
HFDesc.format = PxHeightFieldFormat::eS16_TM;
HFDesc.nbColumns = HFSize.X;
HFDesc.nbRows = HFSize.Y;
HFDesc.samples.data = Samples;
HFDesc.samples.stride = SamplesStride;
HFDesc.flags = PxHeightFieldFlag::eNO_BOUNDARY_EDGES;
HFDesc.thickness = Thickness;
// Set up cooking
const PxCookingParams& Params = PhysXCooking->getParams();
PxCookingParams NewParams = Params;
NewParams.targetPlatform = PhysXFormat;
PhysXCooking->setParams(NewParams);
// Cook to a temp buffer
TArray<uint8> CookedBuffer;
FPhysXOutputStream Buffer(&CookedBuffer);
if (PhysXCooking->cookHeightField(HFDesc, Buffer) && CookedBuffer.Num() > 0)
{
// Append the cooked data into cooked buffer
OutBuffer.Append(CookedBuffer);
return true;
}
return false;
#else
return false;
#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;
}