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#jira UETOOL-3823 #rb lonnie.li #preflight 617b1aea5794a500014f544a #ROBOMERGE-AUTHOR: michael.balzer #ROBOMERGE-SOURCE: CL 17972239 in //UE5/Release-5.0/... via CL 17972248 #ROBOMERGE-BOT: STARSHIP (Release-Engine-Staging -> Release-Engine-Test) (v885-17909292) #ROBOMERGE[STARSHIP]: UE5-Main [CL 17972256 by michael balzer in ue5-release-engine-test branch]
109 lines
4.1 KiB
C++
109 lines
4.1 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "AssetUtils/MeshDescriptionUtil.h"
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#include "Engine/StaticMesh.h"
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#include "Engine/Classes/Components/StaticMeshComponent.h"
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#include "StaticMeshAttributes.h"
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#include "StaticMeshOperations.h"
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void UE::MeshDescription::InitializeAutoGeneratedAttributes(FMeshDescription& Mesh, const FMeshBuildSettings* BuildSettings)
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{
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check(BuildSettings);
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// if the build settings don't indicate calculated normals/tangents, we will assume they are good
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if (BuildSettings->bRecomputeNormals || BuildSettings->bRecomputeTangents)
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{
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// check if any are invalid
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bool bHasInvalidNormals, bHasInvalidTangents;
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FStaticMeshOperations::AreNormalsAndTangentsValid(Mesh, bHasInvalidNormals, bHasInvalidTangents);
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// if neither are invalid we are not going to recompute
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if (bHasInvalidNormals || bHasInvalidTangents)
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{
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FStaticMeshAttributes Attributes(Mesh);
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if (!Attributes.GetTriangleNormals().IsValid() || !Attributes.GetTriangleTangents().IsValid())
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{
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// If these attributes don't exist, create them and compute their values for each triangle
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FStaticMeshOperations::ComputeTriangleTangentsAndNormals(Mesh);
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}
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EComputeNTBsFlags ComputeNTBsOptions = EComputeNTBsFlags::BlendOverlappingNormals;
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ComputeNTBsOptions |= BuildSettings->bRecomputeNormals ? EComputeNTBsFlags::Normals : EComputeNTBsFlags::None;
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ComputeNTBsOptions |= BuildSettings->bRecomputeTangents ? EComputeNTBsFlags::Tangents : EComputeNTBsFlags::None;
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ComputeNTBsOptions |= BuildSettings->bUseMikkTSpace ? EComputeNTBsFlags::UseMikkTSpace : EComputeNTBsFlags::None;
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ComputeNTBsOptions |= BuildSettings->bComputeWeightedNormals ? EComputeNTBsFlags::WeightedNTBs : EComputeNTBsFlags::None;
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ComputeNTBsOptions |= BuildSettings->bRemoveDegenerates ? EComputeNTBsFlags::IgnoreDegenerateTriangles : EComputeNTBsFlags::None;
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FStaticMeshOperations::ComputeTangentsAndNormals(Mesh, ComputeNTBsOptions);
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}
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}
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}
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void UE::MeshDescription::InitializeAutoGeneratedAttributes(FMeshDescription& Mesh, UStaticMesh* StaticMesh, int32 SourceLOD)
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{
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#if WITH_EDITOR
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if (ensureMsgf(SourceLOD < StaticMesh->GetNumSourceModels(), TEXT("InitializeMeshDescription requested LOD index greater than num available in UStaticMesh")))
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{
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const FStaticMeshSourceModel& SourceModel = StaticMesh->GetSourceModel(SourceLOD);
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InitializeAutoGeneratedAttributes(Mesh, &SourceModel.BuildSettings);
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}
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#else
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ensureMsgf(false, TEXT("InitializeMeshDescription requires Editor-only SourceModel field of UStaticMesh"));
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#endif
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}
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void UE::MeshDescription::InitializeAutoGeneratedAttributes(FMeshDescription& Mesh, UActorComponent* StaticMeshComponent, int32 SourceLOD)
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{
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#if WITH_EDITOR
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if (Cast<UStaticMeshComponent>(StaticMeshComponent) != nullptr)
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{
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UStaticMesh* StaticMesh = Cast<UStaticMeshComponent>(StaticMeshComponent)->GetStaticMesh();
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if (ensure(StaticMesh != nullptr))
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{
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InitializeAutoGeneratedAttributes(Mesh, StaticMesh, SourceLOD);
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}
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}
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#else
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//ensureMsgf(false, TEXT("InitializeMeshDescription requires Editor-only SourceModel field of UStaticMesh"));
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#endif
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}
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void UE::MeshDescription::ConfigureBuildSettings(UStaticMesh* StaticMesh, int32 SourceLOD, FStaticMeshBuildSettingChange NewSettings)
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{
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#if WITH_EDITOR
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if (ensureMsgf(SourceLOD < StaticMesh->GetNumSourceModels(), TEXT("ConfigureBuildSettings requested LOD index greater than num available in UStaticMesh")))
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{
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FStaticMeshSourceModel& SourceModel = StaticMesh->GetSourceModel(SourceLOD);
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if (NewSettings.AutoGeneratedNormals != EBuildSettingBoolChange::NoChange)
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{
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SourceModel.BuildSettings.bRecomputeNormals =
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(NewSettings.AutoGeneratedNormals == EBuildSettingBoolChange::Disable) ? false : true;
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}
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if (NewSettings.AutoGeneratedTangents != EBuildSettingBoolChange::NoChange)
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{
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SourceModel.BuildSettings.bRecomputeTangents =
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(NewSettings.AutoGeneratedTangents == EBuildSettingBoolChange::Disable) ? false : true;
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}
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if (NewSettings.UseMikkTSpaceTangents != EBuildSettingBoolChange::NoChange)
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{
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SourceModel.BuildSettings.bUseMikkTSpace =
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(NewSettings.UseMikkTSpaceTangents == EBuildSettingBoolChange::Disable) ? false : true;
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}
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}
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#else
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// just ignore?
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#endif
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} |