FByteBulkData* UBodySetup::GetCookedData(FName Format)
{
if (IsTemplate())
{
return NULL;
}
IInterface_CollisionDataProvider* CDP = Cast<IInterface_CollisionDataProvider>(GetOuter());
// If there is nothing to cook or if we are reading data from a cooked package for an asset with no collision,
// we want to return here
if ((AggGeom.ConvexElems.Num() == 0 && CDP == NULL) || !bHasCookedCollisionData)
{
return NULL;
}
FFormatContainer* UseCookedData = CookedFormatDataOverride ? CookedFormatDataOverride : &CookedFormatData;
bool bContainedData = UseCookedData->Contains(Format);
FByteBulkData* Result = &UseCookedData->GetFormat(Format);
#if WITH_PHYSX
if (!bContainedData)
{
if (FPlatformProperties::RequiresCookedData())
{
UE_LOG(LogPhysics, Error, TEXT("Attempt to build physics data for %s when we are unable to. This platform requires cooked packages."), *GetPathName());
}
if (AggGeom.ConvexElems.Num() == 0 && (CDP == NULL || CDP->ContainsPhysicsTriMeshData(bMeshCollideAll) == false))
{
return NULL;
}
#if WITH_RUNTIME_PHYSICS_COOKING || WITH_EDITOR
TArray<uint8> OutData;
FDerivedDataPhysXCooker* DerivedPhysXData = new FDerivedDataPhysXCooker(Format, this);
if (DerivedPhysXData->CanBuild())
{
#if WITH_EDITOR
GetDerivedDataCacheRef().GetSynchronous(DerivedPhysXData, OutData);
#elif WITH_RUNTIME_PHYSICS_COOKING
DerivedPhysXData->Build(OutData);
#endif
if (OutData.Num())
{
Result->Lock(LOCK_READ_WRITE);
FMemory::Memcpy(Result->Realloc(OutData.Num()), OutData.GetData(), OutData.Num());
Result->Unlock();
}
}
else
#endif
{
UE_LOG(LogPhysics, Warning, TEXT("Attempt to build physics data for %s when we are unable to."), *GetPathName());
}
}
#endif // WITH_PHYSX
check(Result);
return Result->GetBulkDataSize() > 0 ? Result : NULL; // we don't return empty bulk data...but we save it to avoid thrashing the DDC
}
bool FDerivedDataPhysXCooker::ShouldGenerateTriMeshData(bool InUseAllTriData)
{
check(Cooker != NULL);
IInterface_CollisionDataProvider* CDP = Cast<IInterface_CollisionDataProvider>(CollisionDataProvider);
const bool bPerformCook = ( CDP != NULL ) ? CDP->ContainsPhysicsTriMeshData(InUseAllTriData) : false;
return bPerformCook;
}
bool FDerivedDataPhysXCooker::BuildTriMesh( TArray<uint8>& OutData, bool bInMirrored, bool InUseAllTriData )
{
check(Cooker != NULL);
bool bResult = false;
FTriMeshCollisionData TriangleMeshDesc;
IInterface_CollisionDataProvider* CDP = Cast<IInterface_CollisionDataProvider>(CollisionDataProvider);
check(CDP != NULL); // It's all been checked before getting into this function
bool bHaveTriMeshData = CDP->GetPhysicsTriMeshData(&TriangleMeshDesc, InUseAllTriData);
if(bHaveTriMeshData)
{
// If any of the below checks gets hit this usually means
// IInterface_CollisionDataProvider::ContainsPhysicsTriMeshData did not work properly.
const int32 NumIndices = TriangleMeshDesc.Indices.Num();
const int32 NumVerts = TriangleMeshDesc.Vertices.Num();
if(NumIndices == 0 || NumVerts == 0 || TriangleMeshDesc.MaterialIndices.Num() > NumIndices)
{
UE_LOG(LogPhysics, Warning, TEXT("FDerivedDataPhysXCooker::BuildTriMesh: Triangle data from '%s' invalid (%d verts, %d indices)."), *CollisionDataProvider->GetPathName(), NumVerts, NumIndices );
return bResult;
}
TArray<FVector>* MeshVertices = NULL;
TArray<FVector> MirroredVerts;
if( bInMirrored )
{
MirroredVerts.AddUninitialized(NumVerts);
for(int32 VertIdx=0; VertIdx<NumVerts; VertIdx++)
{
MirroredVerts[VertIdx] = TriangleMeshDesc.Vertices[VertIdx] * FVector(-1,1,1);
}
MeshVertices = &MirroredVerts;
}
else
{
MeshVertices = &TriangleMeshDesc.Vertices;
}
UE_LOG(LogPhysics, Log, TEXT("Cook TriMesh: %s (FlipX: %d)"), *CollisionDataProvider->GetPathName(), bInMirrored);
bool bPerPolySkeletalMesh = false;
if (USkeletalMesh* SkeletalMesh = Cast<USkeletalMesh>(CollisionDataProvider))
{
ensure(SkeletalMesh->bEnablePerPolyCollision);
bPerPolySkeletalMesh = true;
}
bResult = Cooker->CookTriMesh( Format, *MeshVertices, TriangleMeshDesc.Indices, TriangleMeshDesc.MaterialIndices, bInMirrored ? !TriangleMeshDesc.bFlipNormals : TriangleMeshDesc.bFlipNormals, OutData, bPerPolySkeletalMesh );
if( !bResult )
{
UE_LOG(LogPhysics, Warning, TEXT("Failed to cook TriMesh: %s (FlipX:%d)."), *CollisionDataProvider->GetPathName(), bInMirrored );
}
}
return bResult;
}
FDerivedDataNavCollisionCooker::FDerivedDataNavCollisionCooker(FName InFormat, UNavCollision* InInstance)
: NavCollisionInstance(InInstance)
, CollisionDataProvider( NULL )
, Format( InFormat )
{
check(NavCollisionInstance != NULL);
CollisionDataProvider = NavCollisionInstance->GetOuter();
DataGuid = NavCollisionInstance->GetGuid();
IInterface_CollisionDataProvider* CDP = Cast<IInterface_CollisionDataProvider>(CollisionDataProvider);
if (CDP)
{
CDP->GetMeshId(MeshId);
}
}
FDerivedDataPhysXCooker::FDerivedDataPhysXCooker( FName InFormat, UBodySetup* InBodySetup )
: BodySetup( InBodySetup )
, CollisionDataProvider( NULL )
, Format( InFormat )
, Cooker( NULL )
{
check( BodySetup != NULL );
CollisionDataProvider = BodySetup->GetOuter();
DataGuid = BodySetup->BodySetupGuid;
bGenerateNormalMesh = BodySetup->bGenerateNonMirroredCollision;
bGenerateMirroredMesh = BodySetup->bGenerateMirroredCollision;
IInterface_CollisionDataProvider* CDP = Cast<IInterface_CollisionDataProvider>(CollisionDataProvider);
if (CDP)
{
CDP->GetMeshId(MeshId);
}
InitCooker();
}
int32 FDerivedDataPhysXCooker::BuildTriMesh( TArray<uint8>& OutData, bool InUseAllTriData )
{
check(Cooker != NULL);
bool bResult = false;
FTriMeshCollisionData TriangleMeshDesc;
IInterface_CollisionDataProvider* CDP = Cast<IInterface_CollisionDataProvider>(CollisionDataProvider);
check(CDP != NULL); // It's all been checked before getting into this function
bool bHaveTriMeshData = CDP->GetPhysicsTriMeshData(&TriangleMeshDesc, InUseAllTriData);
if(bHaveTriMeshData)
{
// If any of the below checks gets hit this usually means
// IInterface_CollisionDataProvider::ContainsPhysicsTriMeshData did not work properly.
const int32 NumIndices = TriangleMeshDesc.Indices.Num();
const int32 NumVerts = TriangleMeshDesc.Vertices.Num();
if(NumIndices == 0 || NumVerts == 0 || TriangleMeshDesc.MaterialIndices.Num() > NumIndices)
{
UE_LOG(LogPhysics, Warning, TEXT("FDerivedDataPhysXCooker::BuildTriMesh: Triangle data from '%s' invalid (%d verts, %d indices)."), *CollisionDataProvider->GetPathName(), NumVerts, NumIndices );
return bResult;
}
TArray<FVector>* MeshVertices = NULL;
MeshVertices = &TriangleMeshDesc.Vertices;
UE_LOG(LogPhysics, Log, TEXT("Cook TriMesh: %s"), *CollisionDataProvider->GetPathName());
bool bDeformableMesh = CollisionDataProvider->IsA(USplineMeshComponent::StaticClass());
if (USkeletalMesh* SkeletalMesh = Cast<USkeletalMesh>(CollisionDataProvider))
{
ensure(SkeletalMesh->bEnablePerPolyCollision);
bDeformableMesh = true;
}
bResult = Cooker->CookTriMesh( Format, RuntimeCookFlags, *MeshVertices, TriangleMeshDesc.Indices, TriangleMeshDesc.MaterialIndices, TriangleMeshDesc.bFlipNormals, OutData, bDeformableMesh );
if( !bResult )
{
UE_LOG(LogPhysics, Warning, TEXT("Failed to cook TriMesh: %s."), *CollisionDataProvider->GetPathName());
}
}
return bResult == true ? 1 : 0; //the cooker only generates 1 or 0 trimeshes. We return an int because we support multiple trimeshes for welding and we might want to do this per static mesh in the future.
}
bool FDerivedDataPhysXCooker::ShouldGenerateNegXTriMeshData()
{
IInterface_CollisionDataProvider* CDP = Cast<IInterface_CollisionDataProvider>(CollisionDataProvider);
const bool bWantsNegX = ( CDP != NULL ) ? CDP->WantsNegXTriMesh() : false;
return bWantsNegX;
}