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| #include "Chaos/TriangleMeshImplicitObject.h"
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| #include "Engine/StaticMesh.h"
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| #include "PhysicsEngine/BodySetup.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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| bool CheckMeshDataForProblem(const Chaos::FTriangleMeshImplicitObject::ParticlesType& Particles, const Chaos::FTrimeshIndexBuffer& Elements)
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| {
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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.GetX(Elements[FaceIdx][0]);
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| const VecType& B = Particles.GetX(Elements[FaceIdx][1]);
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| const VecType& C = Particles.GetX(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 Chaos::FTriangleMeshImplicitObjectPtr& TriMesh : BodySetup->TriMeshGeometries)
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| {
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| if (Chaos::FTriangleMeshImplicitObject* TriMeshData = TriMesh.GetReference())
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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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