/**
* Creates a static mesh object from raw triangle data.
*/
UStaticMesh* CreateStaticMesh(struct FRawMesh& RawMesh,TArray<UMaterialInterface*>& Materials,UObject* InOuter,FName InName)
{
// Create the UStaticMesh object.
FStaticMeshComponentRecreateRenderStateContext RecreateRenderStateContext(FindObject<UStaticMesh>(InOuter,*InName.ToString()));
UStaticMesh* StaticMesh = new(InOuter,InName,RF_Public|RF_Standalone) UStaticMesh(FPostConstructInitializeProperties());
// Add one LOD for the base mesh
FStaticMeshSourceModel* SrcModel = new(StaticMesh->SourceModels) FStaticMeshSourceModel();
SrcModel->RawMeshBulkData->SaveRawMesh(RawMesh);
StaticMesh->Materials = Materials;
int32 NumSections = StaticMesh->Materials.Num();
// Set up the SectionInfoMap to enable collision
for (int32 SectionIdx = 0; SectionIdx < NumSections; ++SectionIdx)
{
FMeshSectionInfo Info = StaticMesh->SectionInfoMap.Get(0, SectionIdx);
Info.MaterialIndex = SectionIdx;
Info.bEnableCollision = true;
StaticMesh->SectionInfoMap.Set(0, SectionIdx, Info);
}
StaticMesh->Build();
StaticMesh->MarkPackageDirty();
return StaticMesh;
}
FReply FProceduralMeshComponentDetails::ClickedOnConvertToStaticMesh()
{
// Find first selected ProcMeshComp
UProceduralMeshComponent* ProcMeshComp = GetFirstSelectedProcMeshComp();
if (ProcMeshComp != nullptr)
{
FString NewNameSuggestion = FString(TEXT("ProcMesh"));
FString PackageName = FString(TEXT("/Game/Meshes/")) + NewNameSuggestion;
FString Name;
FAssetToolsModule& AssetToolsModule = FModuleManager::LoadModuleChecked<FAssetToolsModule>("AssetTools");
AssetToolsModule.Get().CreateUniqueAssetName(PackageName, TEXT(""), PackageName, Name);
TSharedPtr<SDlgPickAssetPath> PickAssetPathWidget =
SNew(SDlgPickAssetPath)
.Title(LOCTEXT("ConvertToStaticMeshPickName", "Choose New StaticMesh Location"))
.DefaultAssetPath(FText::FromString(PackageName));
if (PickAssetPathWidget->ShowModal() == EAppReturnType::Ok)
{
// Get the full name of where we want to create the physics asset.
FString UserPackageName = PickAssetPathWidget->GetFullAssetPath().ToString();
FName MeshName(*FPackageName::GetLongPackageAssetName(UserPackageName));
// Check if the user inputed a valid asset name, if they did not, give it the generated default name
if (MeshName == NAME_None)
{
// Use the defaults that were already generated.
UserPackageName = PackageName;
MeshName = *Name;
}
// Raw mesh data we are filling in
FRawMesh RawMesh;
// Materials to apply to new mesh
TArray<UMaterialInterface*> MeshMaterials;
const int32 NumSections = ProcMeshComp->GetNumSections();
int32 VertexBase = 0;
for (int32 SectionIdx = 0; SectionIdx < NumSections; SectionIdx++)
{
FProcMeshSection* ProcSection = ProcMeshComp->GetProcMeshSection(SectionIdx);
// Copy verts
for (FProcMeshVertex& Vert : ProcSection->ProcVertexBuffer)
{
RawMesh.VertexPositions.Add(Vert.Position);
}
// Copy 'wedge' info
int32 NumIndices = ProcSection->ProcIndexBuffer.Num();
for (int32 IndexIdx=0; IndexIdx < NumIndices; IndexIdx++)
{
int32 Index = ProcSection->ProcIndexBuffer[IndexIdx];
RawMesh.WedgeIndices.Add(Index + VertexBase);
FProcMeshVertex& ProcVertex = ProcSection->ProcVertexBuffer[Index];
FVector TangentX = ProcVertex.Tangent.TangentX;
FVector TangentZ = ProcVertex.Normal;
FVector TangentY = (TangentX ^ TangentZ).GetSafeNormal() * (ProcVertex.Tangent.bFlipTangentY ? -1.f : 1.f);
RawMesh.WedgeTangentX.Add(TangentX);
RawMesh.WedgeTangentY.Add(TangentY);
RawMesh.WedgeTangentZ.Add(TangentZ);
RawMesh.WedgeTexCoords[0].Add(ProcVertex.UV0);
RawMesh.WedgeColors.Add(ProcVertex.Color);
}
// copy face info
int32 NumTris = NumIndices / 3;
for (int32 TriIdx=0; TriIdx < NumTris; TriIdx++)
{
RawMesh.FaceMaterialIndices.Add(SectionIdx);
RawMesh.FaceSmoothingMasks.Add(0); // Assume this is ignored as bRecomputeNormals is false
}
// Remember material
MeshMaterials.Add(ProcMeshComp->GetMaterial(SectionIdx));
// Update offset for creating one big index/vertex buffer
VertexBase += ProcSection->ProcVertexBuffer.Num();
}
// If we got some valid data.
if (RawMesh.VertexPositions.Num() > 3 && RawMesh.WedgeIndices.Num() > 3)
{
// Then find/create it.
UPackage* Package = CreatePackage(NULL, *UserPackageName);
check(Package);
// Create StaticMesh object
UStaticMesh* StaticMesh = NewObject<UStaticMesh>(Package, MeshName, RF_Public | RF_Standalone);
StaticMesh->InitResources();
StaticMesh->LightingGuid = FGuid::NewGuid();
// Add source to new StaticMesh
FStaticMeshSourceModel* SrcModel = new (StaticMesh->SourceModels) FStaticMeshSourceModel();
SrcModel->BuildSettings.bRecomputeNormals = false;
SrcModel->BuildSettings.bRecomputeTangents = false;
SrcModel->BuildSettings.bRemoveDegenerates = false;
SrcModel->BuildSettings.bUseHighPrecisionTangentBasis = false;
SrcModel->BuildSettings.bUseFullPrecisionUVs = false;
SrcModel->BuildSettings.bGenerateLightmapUVs = true;
SrcModel->BuildSettings.SrcLightmapIndex = 0;
SrcModel->BuildSettings.DstLightmapIndex = 1;
SrcModel->RawMeshBulkData->SaveRawMesh(RawMesh);
// Copy materials to new mesh
for (UMaterialInterface* Material : MeshMaterials)
{
StaticMesh->StaticMaterials.Add(FStaticMaterial(Material));
}
// Build mesh from source
StaticMesh->Build(false);
StaticMesh->PostEditChange();
// Notify asset registry of new asset
FAssetRegistryModule::AssetCreated(StaticMesh);
}
}
}
return FReply::Handled();
}
FReply FRuntimeMeshComponentDetails::ClickedOnConvertToStaticMesh()
{
// Find first selected RuntimeMeshComp
URuntimeMeshComponent* RuntimeMeshComp = GetFirstSelectedRuntimeMeshComp();
if (RuntimeMeshComp != nullptr)
{
FString NewNameSuggestion = FString(TEXT("RuntimeMeshComp"));
FString PackageName = FString(TEXT("/Game/Meshes/")) + NewNameSuggestion;
FString Name;
FAssetToolsModule& AssetToolsModule = FModuleManager::LoadModuleChecked<FAssetToolsModule>("AssetTools");
AssetToolsModule.Get().CreateUniqueAssetName(PackageName, TEXT(""), PackageName, Name);
TSharedPtr<SDlgPickAssetPath> PickAssetPathWidget =
SNew(SDlgPickAssetPath)
.Title(LOCTEXT("ConvertToStaticMeshPickName", "Choose New StaticMesh Location"))
.DefaultAssetPath(FText::FromString(PackageName));
if (PickAssetPathWidget->ShowModal() == EAppReturnType::Ok)
{
// Get the full name of where we want to create the physics asset.
FString UserPackageName = PickAssetPathWidget->GetFullAssetPath().ToString();
FName MeshName(*FPackageName::GetLongPackageAssetName(UserPackageName));
// Check if the user inputed a valid asset name, if they did not, give it the generated default name
if (MeshName == NAME_None)
{
// Use the defaults that were already generated.
UserPackageName = PackageName;
MeshName = *Name;
}
// Raw mesh data we are filling in
FRawMesh RawMesh;
// Unique Materials to apply to new mesh
#if ENGINE_MAJOR_VERSION == 4 && ENGINE_MINOR_VERSION >= 14
TArray<FStaticMaterial> Materials;
#else
TArray<UMaterialInterface*> Materials;
#endif
bool bUseHighPrecisionTangents = false;
bool bUseFullPrecisionUVs = false;
const int32 NumSections = RuntimeMeshComp->GetNumSections();
int32 VertexBase = 0;
for (int32 SectionIdx = 0; SectionIdx < NumSections; SectionIdx++)
{
const IRuntimeMeshVerticesBuilder* Vertices;
const FRuntimeMeshIndicesBuilder* Indices;
RuntimeMeshComp->GetSectionMesh(SectionIdx, Vertices, Indices);
if (Vertices->HasHighPrecisionNormals())
{
bUseHighPrecisionTangents = true;
}
if (Vertices->HasHighPrecisionUVs())
{
bUseFullPrecisionUVs = true;
}
// Copy verts
Vertices->Seek(-1);
while (Vertices->MoveNext() < Vertices->Length())
{
RawMesh.VertexPositions.Add(Vertices->GetPosition());
}
// Copy 'wedge' info
Indices->Seek(0);
while (Indices->HasRemaining())
{
int32 Index = Indices->ReadOne();
RawMesh.WedgeIndices.Add(Index + VertexBase);
Vertices->Seek(Index);
FVector TangentX = Vertices->GetTangent();
FVector TangentZ = Vertices->GetNormal();
FVector TangentY = (TangentX ^ TangentZ).GetSafeNormal() * Vertices->GetNormal().W;
RawMesh.WedgeTangentX.Add(TangentX);
RawMesh.WedgeTangentY.Add(TangentY);
RawMesh.WedgeTangentZ.Add(TangentZ);
for (int UVIndex = 0; UVIndex < 8; UVIndex++)
{
if (!Vertices->HasUVComponent(UVIndex))
{
break;
}
RawMesh.WedgeTexCoords[UVIndex].Add(Vertices->GetUV(UVIndex));
}
RawMesh.WedgeColors.Add(Vertices->GetColor());
}
// Find a material index for this section.
UMaterialInterface* Material = RuntimeMeshComp->GetMaterial(SectionIdx);
#if ENGINE_MAJOR_VERSION == 4 && ENGINE_MINOR_VERSION >= 14
int32 MaterialIndex = Materials.AddUnique(FStaticMaterial(Material));
#else
int32 MaterialIndex = Materials.AddUnique(Material);
#endif
// copy face info
int32 NumTris = Indices->Length() / 3;
for (int32 TriIdx=0; TriIdx < NumTris; TriIdx++)
{
// Set the face material
RawMesh.FaceMaterialIndices.Add(MaterialIndex);
RawMesh.FaceSmoothingMasks.Add(0); // Assume this is ignored as bRecomputeNormals is false
}
// Update offset for creating one big index/vertex buffer
VertexBase += Vertices->Length();
}
// If we got some valid data.
if (RawMesh.VertexPositions.Num() >= 3 && RawMesh.WedgeIndices.Num() >= 3)
{
// Then find/create it.
UPackage* Package = CreatePackage(NULL, *UserPackageName);
check(Package);
// Create StaticMesh object
UStaticMesh* StaticMesh = NewObject<UStaticMesh>(Package, MeshName, RF_Public | RF_Standalone);
StaticMesh->InitResources();
StaticMesh->LightingGuid = FGuid::NewGuid();
// Add source to new StaticMesh
FStaticMeshSourceModel* SrcModel = new (StaticMesh->SourceModels) FStaticMeshSourceModel();
SrcModel->BuildSettings.bRecomputeNormals = false;
SrcModel->BuildSettings.bRecomputeTangents = false;
SrcModel->BuildSettings.bRemoveDegenerates = false;
SrcModel->BuildSettings.bUseHighPrecisionTangentBasis = bUseHighPrecisionTangents;
SrcModel->BuildSettings.bUseFullPrecisionUVs = bUseFullPrecisionUVs;
SrcModel->BuildSettings.bGenerateLightmapUVs = true;
SrcModel->BuildSettings.SrcLightmapIndex = 0;
SrcModel->BuildSettings.DstLightmapIndex = 1;
SrcModel->RawMeshBulkData->SaveRawMesh(RawMesh);
// Set the materials used for this static mesh
#if ENGINE_MAJOR_VERSION == 4 && ENGINE_MINOR_VERSION >= 14
StaticMesh->StaticMaterials = Materials;
int32 NumMaterials = StaticMesh->StaticMaterials.Num();
#else
StaticMesh->Materials = Materials;
int32 NumMaterials = StaticMesh->Materials.Num();
#endif
// Set up the SectionInfoMap to enable collision
for (int32 SectionIdx = 0; SectionIdx < NumMaterials; SectionIdx++)
{
FMeshSectionInfo Info = StaticMesh->SectionInfoMap.Get(0, SectionIdx);
Info.MaterialIndex = SectionIdx;
Info.bEnableCollision = true;
StaticMesh->SectionInfoMap.Set(0, SectionIdx, Info);
}
// Configure body setup for working collision.
StaticMesh->CreateBodySetup();
StaticMesh->BodySetup->CollisionTraceFlag = CTF_UseComplexAsSimple;
// Build mesh from source
StaticMesh->Build(false);
// Make package dirty.
StaticMesh->MarkPackageDirty();
StaticMesh->PostEditChange();
// Notify asset registry of new asset
FAssetRegistryModule::AssetCreated(StaticMesh);
}
}
}
return FReply::Handled();
}
