100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "Chaos/TriangleMeshImplicitObject.h"
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#include "Containers/Array.h"
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#include "Containers/UnrealString.h"
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#include "Delegates/Delegate.h"
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#include "Engine/StaticMesh.h"
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#include "HAL/IConsoleManager.h"
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#include "Logging/LogCategory.h"
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#include "Logging/LogMacros.h"
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#include "Math/UnrealMathSSE.h"
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#include "PhysicsEngine/BodySetup.h"
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#include "Templates/SharedPointer.h"
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#include "Trace/Detail/Channel.h"
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#include "UObject/UObjectBaseUtility.h"
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#include "UObject/UObjectIterator.h"
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class FOutputDevice;
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class UWorld;
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namespace LyraEditorUtilities
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{
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//////////////////////////////////////////////////////////////////////////
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// returns true if the mesh has one or more degenerate triangles
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bool CheckMeshDataForProblem(const Chaos::FTriangleMeshImplicitObject::ParticlesType& Particles, const Chaos::FTrimeshIndexBuffer& Elements)
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{
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// Internal helper because the index buffer type is templated
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auto CheckTris = [&](const auto& Elements, int32 NumTriangles)
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{
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using VecType = Chaos::FTriangleMeshImplicitObject::ParticleVecType;
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for (int32 FaceIdx = 0; FaceIdx < NumTriangles; ++FaceIdx)
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{
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const VecType& A = Particles.X(Elements[FaceIdx][0]);
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const VecType& B = Particles.X(Elements[FaceIdx][1]);
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const VecType& C = Particles.X(Elements[FaceIdx][2]);
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const VecType AB = B - A;
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const VecType AC = C - A;
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VecType Normal = VecType::CrossProduct(AB, AC);
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if (Normal.SafeNormalize() < SMALL_NUMBER)
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{
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return true;
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}
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}
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return false;
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};
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const int32 NumTriangles = Elements.GetNumTriangles();
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if (Elements.RequiresLargeIndices())
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{
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return CheckTris(Elements.GetLargeIndexBuffer(), NumTriangles);
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}
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else
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{
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return CheckTris(Elements.GetSmallIndexBuffer(), NumTriangles);
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}
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}
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void CheckChaosMeshCollision(FOutputDevice& Ar)
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{
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for (UStaticMesh* MeshAsset : TObjectRange<UStaticMesh>())
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{
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if (UBodySetup* BodySetup = MeshAsset->GetBodySetup())
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{
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for (const TSharedPtr<Chaos::FTriangleMeshImplicitObject, ESPMode::ThreadSafe>& TriMesh : BodySetup->ChaosTriMeshes)
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{
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if (Chaos::FTriangleMeshImplicitObject* TriMeshData = TriMesh.Get())
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{
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if (CheckMeshDataForProblem(TriMeshData->Particles(), TriMeshData->Elements()))
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{
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UE_LOG(LogConsoleResponse, Warning, TEXT("Mesh asset %s has one or more degenerate triangles in collision data"), *GetPathNameSafe(MeshAsset));
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}
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}
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}
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}
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}
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}
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FAutoConsoleCommandWithWorldArgsAndOutputDevice GCheckChaosMeshCollisionCmd(
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TEXT("Lyra.CheckChaosMeshCollision"),
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TEXT("Usage:\n")
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TEXT(" Lyra.CheckChaosMeshCollision\n")
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TEXT("\n")
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TEXT("It will check Chaos collision data for all *loaded* static mesh assets for any degenerate triangles"),
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FConsoleCommandWithWorldArgsAndOutputDeviceDelegate::CreateStatic(
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[](const TArray<FString>& Params, UWorld* World, FOutputDevice& Ar)
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{
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CheckChaosMeshCollision(Ar);
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}));
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//////////////////////////////////////////////////////////////////////////
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}; // End of namespace
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