Aollero/building impostor texture (#6379)
* Impostor texture SceneCapture component * SceneComponment distance issue solved with ortho camera * Dynamic Scene Component Creation * Procedural material duplication for new building * Generate Impostor Geometry * Impostor texture SceneCapture component * SceneComponment distance issue solved with ortho camera * Dynamic Scene Component Creation * Procedural material duplication for new building * Generate Impostor Geometry * Style updated * Update ProceduralBuildingUtilities.h * Ubuntu error fixed --------- Co-authored-by: aollero <aollero@cvc.uab.cat>
This commit is contained in:
adrian-ollero
GitHub
parent
a9819fa289
commit
89a4cf29fc
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@ -4,16 +4,88 @@
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#include "ProceduralBuildingUtilities.h"
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#include "AssetRegistryModule.h"
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#include "Components/SceneCaptureComponent2D.h"
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#include "Components/StaticMeshComponent.h"
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#include "Engine/TextureRenderTarget2D.h"
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#include "FileHelpers.h"
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#include "GameFramework/Actor.h"
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#include "IMeshMergeUtilities.h"
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#include "Materials/MaterialInstanceConstant.h"
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#include "MeshMergeModule.h"
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#include "ProceduralMeshComponent.h"
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#include "UObject/Class.h"
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#include "UObject/UObjectGlobals.h"
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void AProceduralBuildingUtilities::GenerateImpostor()
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void AProceduralBuildingUtilities::GenerateImpostorTexture(const FVector& BuildingSize)
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{
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// Not implemented yet.
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USceneCaptureComponent2D* Camera = NewObject<USceneCaptureComponent2D>(
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this, USceneCaptureComponent2D::StaticClass(), TEXT("ViewProjectionCaptureComponent"));
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Camera->AttachToComponent(
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GetRootComponent(),
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FAttachmentTransformRules::SnapToTargetNotIncludingScale,
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FName("ViewProjectionCaptureComponentName"));
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AddInstanceComponent(Camera);
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Camera->OnComponentCreated();
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Camera->RegisterComponent();
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check(Camera!=nullptr);
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Camera->ProjectionType = ECameraProjectionMode::Orthographic;
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Camera->PrimitiveRenderMode = ESceneCapturePrimitiveRenderMode::PRM_UseShowOnlyList;
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Camera->CaptureSource = ESceneCaptureSource::SCS_BaseColor;
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if(Camera->ShowOnlyActors.Num() == 0)
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{
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Camera->ShowOnlyActors.Add(this);
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}
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SetTargetTextureToSceneCaptureComponent(Camera);
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check(Camera->TextureTarget != nullptr);
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// FRONT View
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RenderImpostorView(Camera, BuildingSize, EBuildingCameraView::FRONT);
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// LEFT View
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RenderImpostorView(Camera, BuildingSize, EBuildingCameraView::LEFT);
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// BACK View
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RenderImpostorView(Camera, BuildingSize, EBuildingCameraView::BACK);
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// RIGHT View
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RenderImpostorView(Camera, BuildingSize, EBuildingCameraView::RIGHT);
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Camera->DestroyComponent();
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}
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UProceduralMeshComponent* AProceduralBuildingUtilities::GenerateImpostorGeometry(const FVector& BuildingSize)
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{
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// Spawn procedural mesh actor / component
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UProceduralMeshComponent* Mesh = NewObject<UProceduralMeshComponent>(
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this, UProceduralMeshComponent::StaticClass(), TEXT("LOD Impostor Mesh"));
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Mesh->AttachToComponent(
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GetRootComponent(),
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FAttachmentTransformRules::SnapToTargetNotIncludingScale,
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FName("LOD Impostor Mesh"));
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AddInstanceComponent(Mesh);
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Mesh->OnComponentCreated();
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Mesh->RegisterComponent();
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check(Mesh != nullptr)
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// FRONT View
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CreateBuildingImpostorGeometryForView(Mesh, BuildingSize, EBuildingCameraView::FRONT);
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// LEFT View
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CreateBuildingImpostorGeometryForView(Mesh, BuildingSize, EBuildingCameraView::LEFT);
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// BACK View
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CreateBuildingImpostorGeometryForView(Mesh, BuildingSize, EBuildingCameraView::BACK);
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// RIGHT View
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CreateBuildingImpostorGeometryForView(Mesh, BuildingSize, EBuildingCameraView::RIGHT);
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return Mesh;
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// Cook new mesh to a static mesh
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// Assign as LOD or store on disk for manual import
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}
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void AProceduralBuildingUtilities::CookProceduralBuildingToMesh(const FString& DestinationPath, const FString& FileName)
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@ -40,6 +112,7 @@ void AProceduralBuildingUtilities::CookProceduralBuildingToMesh(const FString& D
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FString PackageName = DestinationPath + FileName;
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UPackage* NewPackage = CreatePackage(*PackageName);
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check(NewPackage);
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const IMeshMergeUtilities& MeshUtilities = FModuleManager::Get().LoadModuleChecked<IMeshMergeModule>("MeshMergeUtilities").GetUtilities();
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MeshUtilities.MergeComponentsToStaticMesh(
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@ -64,3 +137,292 @@ void AProceduralBuildingUtilities::CookProceduralBuildingToMesh(const FString& D
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true,
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SAVE_NoError);
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}
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void AProceduralBuildingUtilities::CookProceduralMeshToMesh(
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UProceduralMeshComponent* Mesh,
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const FString& DestinationPath,
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const FString& FileName)
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{
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FMeshDescription MeshDescription = BuildMeshDescription(Mesh);
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FString PackageName = DestinationPath + FileName;
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UPackage* NewPackage = CreatePackage(*PackageName);
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check(NewPackage);
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UStaticMesh* StaticMesh = NewObject<UStaticMesh>(NewPackage, *FileName, RF_Public | RF_Standalone);
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StaticMesh->InitResources();
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StaticMesh->LightingGuid = FGuid::NewGuid();
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FStaticMeshSourceModel& SrcModel = StaticMesh->AddSourceModel();
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SrcModel.BuildSettings.bRecomputeNormals = false;
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SrcModel.BuildSettings.bRecomputeTangents = false;
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SrcModel.BuildSettings.bRemoveDegenerates = false;
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SrcModel.BuildSettings.bUseHighPrecisionTangentBasis = false;
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SrcModel.BuildSettings.bUseFullPrecisionUVs = false;
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SrcModel.BuildSettings.bGenerateLightmapUVs = true;
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SrcModel.BuildSettings.SrcLightmapIndex = 0;
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SrcModel.BuildSettings.DstLightmapIndex = 1;
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StaticMesh->CreateMeshDescription(0, MoveTemp(MeshDescription));
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StaticMesh->CommitMeshDescription(0);
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if (!Mesh->bUseComplexAsSimpleCollision )
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{
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StaticMesh->CreateBodySetup();
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UBodySetup* NewBodySetup = StaticMesh->BodySetup;
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NewBodySetup->BodySetupGuid = FGuid::NewGuid();
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NewBodySetup->AggGeom.ConvexElems = Mesh->ProcMeshBodySetup->AggGeom.ConvexElems;
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NewBodySetup->bGenerateMirroredCollision = false;
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NewBodySetup->bDoubleSidedGeometry = true;
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NewBodySetup->CollisionTraceFlag = CTF_UseDefault;
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NewBodySetup->CreatePhysicsMeshes();
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}
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TSet<UMaterialInterface*> UniqueMaterials;
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const int32 NumSections = Mesh->GetNumSections();
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for (int32 SectionIdx = 0; SectionIdx < NumSections; SectionIdx++)
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{
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FProcMeshSection *ProcSection =
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Mesh->GetProcMeshSection(SectionIdx);
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UMaterialInterface *Material = Mesh->GetMaterial(SectionIdx);
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UniqueMaterials.Add(Material);
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}
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for (auto* Material : UniqueMaterials)
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{
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StaticMesh->StaticMaterials.Add(FStaticMaterial(Material));
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}
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StaticMesh->ImportVersion = EImportStaticMeshVersion::LastVersion;
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StaticMesh->Build(false);
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StaticMesh->PostEditChange();
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FAssetRegistryModule::AssetCreated(StaticMesh);
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UPackage::SavePackage(NewPackage,
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StaticMesh,
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EObjectFlags::RF_Public | EObjectFlags::RF_Standalone,
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*FileName,
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GError,
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nullptr,
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true,
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true,
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SAVE_NoError);
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}
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UMaterialInstanceConstant* AProceduralBuildingUtilities::GenerateBuildingMaterialAsset(
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const FString& DuplicateParentPath,
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const FString& DestinationPath,
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const FString& FileName)
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{
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const FString BaseMaterialSearchPath = DuplicateParentPath;
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const FString PackageName = DestinationPath + FileName;
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UMaterialInstanceConstant* ParentMaterial = LoadObject<UMaterialInstanceConstant>(nullptr, *BaseMaterialSearchPath);
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check(ParentMaterial != nullptr);
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UPackage* NewPackage = CreatePackage(*PackageName);
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FObjectDuplicationParameters Parameters(ParentMaterial, NewPackage);
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Parameters.DestName = FName(FileName);
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Parameters.DestClass = ParentMaterial->GetClass();
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Parameters.DuplicateMode = EDuplicateMode::Normal;
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Parameters.PortFlags = PPF_Duplicate;
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UMaterialInstanceConstant* DuplicatedMaterial = CastChecked<UMaterialInstanceConstant>(StaticDuplicateObjectEx(Parameters));
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const FString PackageFileName = FPackageName::LongPackageNameToFilename(
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PackageName,
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".uasset");
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UPackage::SavePackage(NewPackage, DuplicatedMaterial, EObjectFlags::RF_Public | EObjectFlags::RF_Standalone,
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*PackageFileName, GError, nullptr, true, true, SAVE_NoError);
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return DuplicatedMaterial;
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}
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void AProceduralBuildingUtilities::RenderImpostorView(
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USceneCaptureComponent2D* Camera,
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const FVector BuildingSize,
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const EBuildingCameraView View)
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{
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MoveCameraToViewPosition(Camera, BuildingSize, View);
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Camera->CaptureScene();
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UTextureRenderTarget2D* CameraRT = Camera->TextureTarget;
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UTexture2D* ViewTexture = CameraRT->ConstructTexture2D(GetWorld(), FString("View_").Append(FString::FromInt(View)), EObjectFlags::RF_NoFlags );
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BakeSceneCaptureRTToTextureAtlas(ViewTexture, View);
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}
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void AProceduralBuildingUtilities::MoveCameraToViewPosition(
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USceneCaptureComponent2D* Camera,
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const FVector BuildingSize,
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const EBuildingCameraView View)
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{
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const float BuildingHeight = BuildingSize.Z;
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float ViewAngle = 0.f;
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float BuildingWidth = 0.f;
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float BuildingDepth = 0.f;
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GetWidthDepthFromView(BuildingSize, View, BuildingWidth, BuildingDepth, ViewAngle);
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/* ORTHO */
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float ViewOrthoWidth = FMath::Max(BuildingWidth, BuildingHeight);
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Camera->OrthoWidth = ViewOrthoWidth;
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float CameraDistance = 0.5f * BuildingDepth + 1000.f;
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FVector NewCameraLocation(
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CameraDistance * FMath::Cos(FMath::DegreesToRadians(ViewAngle)),
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CameraDistance * FMath::Sin(FMath::DegreesToRadians(ViewAngle)),
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BuildingSize.Z / 2.0f);
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FRotator NewCameraRotation(0.0f, ViewAngle + 180.f, 0.0f);
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Camera->SetRelativeLocationAndRotation(NewCameraLocation, NewCameraRotation, false, nullptr, ETeleportType::None);
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}
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void AProceduralBuildingUtilities::CreateBuildingImpostorGeometryForView(
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UProceduralMeshComponent* Mesh,
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const FVector& BuildingSize,
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const EBuildingCameraView View)
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{
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// Create vertices based on Building Size
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TArray<FVector> Vertices;
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TArray<int32> Triangles;
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const float BuildingHeight = BuildingSize.Z;
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float BuildingWidth = 0.f;
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float BuildingDepth = 0.f;
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float ViewAngle = 0.f;
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GetWidthDepthFromView(BuildingSize, View, BuildingWidth, BuildingDepth, ViewAngle);
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FVector RotationAxis(0.0f, 0.0f, 1.0f);
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FVector OriginOffset(- 0.5f * BuildingDepth, - 0.5f * BuildingWidth, 0.0f);
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// Vertices are created in local space, then offsetted to compensate origin and finally rotating
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// according to the ViewAngle
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Vertices.Add((FVector(0.0f, 0.0f, 0.0f) + OriginOffset).RotateAngleAxis(ViewAngle, RotationAxis));
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Vertices.Add((FVector(0.0f, 0.0f, BuildingHeight) + OriginOffset).RotateAngleAxis(ViewAngle, RotationAxis));
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Vertices.Add((FVector(0.0f, BuildingWidth, 0.0f) + OriginOffset).RotateAngleAxis(ViewAngle, RotationAxis));
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Vertices.Add((FVector(0.0f, BuildingWidth, BuildingHeight) + OriginOffset).RotateAngleAxis(ViewAngle, RotationAxis));
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Triangles.Add(0); Triangles.Add(2); Triangles.Add(1);
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Triangles.Add(2); Triangles.Add(3); Triangles.Add(1);
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TArray<FVector2D> UVs;
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CalculateViewGeometryUVs(BuildingWidth, BuildingHeight, View, UVs);
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TArray<FVector> Normals;
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Normals.Init(FVector(-1.0f, 0.0f, 0.0f).RotateAngleAxis(ViewAngle, RotationAxis), Vertices.Num());
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TArray<FLinearColor> Colors;
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Colors.Init(FLinearColor(0.0f, 0.0f, 0.0f, 1.0f), Vertices.Num());
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TArray<FProcMeshTangent> Tangents;
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// Tangents.Init(FProcMeshTangent(-1.0f, -1.0f, -1.0f).RotateAngleAxis(ViewAngle, RotationAxis), Vertices.Num());
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Tangents.Init(FProcMeshTangent(FVector(0.0f, 1.0f, 0.0f).RotateAngleAxis(ViewAngle, RotationAxis), false), Vertices.Num());
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Mesh->CreateMeshSection_LinearColor((int32)View, Vertices, Triangles, Normals, UVs, Colors, Tangents, false);
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}
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void AProceduralBuildingUtilities::GetWidthDepthFromView(
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const FVector& BuildingSize,
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const EBuildingCameraView View,
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float& OutWidth,
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float& OutDepth,
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float& OutViewAngle)
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{
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switch(View)
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{
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case EBuildingCameraView::FRONT:
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OutViewAngle = 0.0f;
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OutWidth = FMath::Abs(BuildingSize.Y);
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OutDepth = FMath::Abs(BuildingSize.X);
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break;
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case EBuildingCameraView::LEFT:
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OutViewAngle = 90.0f;
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OutWidth = FMath::Abs(BuildingSize.X);
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OutDepth = FMath::Abs(BuildingSize.Y);
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break;
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case EBuildingCameraView::BACK:
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OutViewAngle = 180.0f;
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OutWidth = FMath::Abs(BuildingSize.Y);
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OutDepth = FMath::Abs(BuildingSize.X);
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break;
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case EBuildingCameraView::RIGHT:
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OutViewAngle = 270.0f;
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OutWidth = FMath::Abs(BuildingSize.X);
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OutDepth = FMath::Abs(BuildingSize.Y);
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break;
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default:
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OutViewAngle = 0.0f;
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OutWidth = 0.0f;
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OutDepth = 0.0f;
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}
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}
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void AProceduralBuildingUtilities::CalculateViewGeometryUVs(
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const float BuildingWidth,
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const float BuildingHeight,
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const EBuildingCameraView View,
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TArray<FVector2D>& OutUVs)
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{
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// Calculate UVs from 0 to 1
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// ------------
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// | uv1 uv3 |
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// | uv0 uv2 |
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// ------------
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FVector2D OriginOffset;
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switch(View)
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{
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case EBuildingCameraView::FRONT:
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OriginOffset = FVector2D(0.3f, 0.3f);
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break;
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case EBuildingCameraView::LEFT:
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OriginOffset = FVector2D(0.3f, 0.4f);
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break;
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case EBuildingCameraView::BACK:
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OriginOffset = FVector2D(0.4f, 0.3f);
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break;
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case EBuildingCameraView::RIGHT:
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OriginOffset = FVector2D(0.4f, 0.4f);
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break;
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default:
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OriginOffset = FVector2D(0.0f, 0.0f);
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}
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float WidthRatio = BuildingWidth / BuildingHeight;
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float HeightRatio = BuildingHeight / BuildingWidth;
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FVector2D X0, X1, X2, X3;
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if(WidthRatio < 1.0f)
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{
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// Fit Vertically
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X0 = FVector2D(0.05f - 0.05f * WidthRatio, 0.1f) + OriginOffset;
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X1 = FVector2D(0.05f - 0.05f * WidthRatio, 0.0f) + OriginOffset;
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X2 = FVector2D(0.05f + 0.05f * WidthRatio, 0.1f) + OriginOffset;
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X3 = FVector2D(0.05f + 0.05f * WidthRatio, 0.0f) + OriginOffset;
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}
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else
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{
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// Fit Horizontally
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X0 = FVector2D(0.0f, 0.05f + 0.05f * HeightRatio) + OriginOffset;
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X1 = FVector2D(0.0f, 0.05f - 0.05f * HeightRatio) + OriginOffset;
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X2 = FVector2D(0.1f, 0.05f + 0.05f * HeightRatio) + OriginOffset;
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X3 = FVector2D(0.1f, 0.05f - 0.05f * HeightRatio) + OriginOffset;
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}
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// Fix offset to fit in view quadrant
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OutUVs.Add(X0);
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OutUVs.Add(X1);
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OutUVs.Add(X2);
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OutUVs.Add(X3);
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}
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@ -6,7 +6,17 @@
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#include "EditorUtilityActor.h"
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#include "ProceduralBuildingUtilities.generated.h"
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struct FIntRect;
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class USceneCaptureComponent2D;
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class UTexture2D;
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UENUM(BlueprintType)
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enum EBuildingCameraView
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{
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FRONT,
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LEFT,
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BACK,
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RIGHT
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};
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/**
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*
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@ -17,10 +27,49 @@ class CARLATOOLS_API AProceduralBuildingUtilities : public AEditorUtilityActor
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GENERATED_BODY()
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public:
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UFUNCTION(BlueprintImplementableEvent, Category="Procedural Building Utilities")
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void BakeSceneCaptureRTToTextureAtlas(UTexture2D* SceneCaptureRT, EBuildingCameraView TargetView);
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UFUNCTION(BlueprintImplementableEvent, Category="Procedural Building Utilities")
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void SetTargetTextureToSceneCaptureComponent(USceneCaptureComponent2D* SceneCaptureComponent);
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UFUNCTION(BlueprintCallable, Category="Procedural Building Utilities")
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void GenerateImpostor();
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void GenerateImpostorTexture(const FVector& BuildingSize);
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UFUNCTION(BlueprintCallable, Category="Procedural Building Utilities")
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class UProceduralMeshComponent* GenerateImpostorGeometry(const FVector& BuildingSize);
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UFUNCTION(BlueprintCallable, Category="Procedural Building Utilities")
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void CookProceduralBuildingToMesh(const FString& DestinationPath, const FString& FileName);
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UFUNCTION(BlueprintCallable, Category="Procedural Building Utilities")
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void CookProceduralMeshToMesh(class UProceduralMeshComponent* Mesh, const FString& DestinationPath, const FString& FileName);
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UFUNCTION(BlueprintCallable, Category="Procedural Building Utilities")
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class UMaterialInstanceConstant* GenerateBuildingMaterialAsset(
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const FString& DuplicateParentPath,
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const FString& DestinationPath,
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const FString& FileName);
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private:
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void RenderImpostorView(USceneCaptureComponent2D* Camera, const FVector BuildingSize, const EBuildingCameraView View);
|
||||
void MoveCameraToViewPosition(USceneCaptureComponent2D* Camera, const FVector BuildingSize, const EBuildingCameraView View);
|
||||
|
||||
void CreateBuildingImpostorGeometryForView(
|
||||
class UProceduralMeshComponent* Mesh,
|
||||
const FVector& BuildingSize,
|
||||
const EBuildingCameraView View);
|
||||
|
||||
void GetWidthDepthFromView(
|
||||
const FVector& BuildingSize,
|
||||
const EBuildingCameraView View,
|
||||
float& OutWidth, float& OutDepth,
|
||||
float& OutViewAngle);
|
||||
|
||||
void CalculateViewGeometryUVs(
|
||||
const float BuildingWidth,
|
||||
const float BuildingHeight,
|
||||
const EBuildingCameraView View,
|
||||
TArray<FVector2D>& OutUVs);
|
||||
|
||||
};
|
||||
|
|
|
|||
Loading…
Reference in New Issue