File size: 2,754 Bytes
7fd553e | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 | // Copyright Epic Games, Inc. All Rights Reserved.
#include "Chaos/TriangleMeshImplicitObject.h"
#include "Engine/StaticMesh.h"
#include "PhysicsEngine/BodySetup.h"
#include "UObject/UObjectIterator.h"
class FOutputDevice;
class UWorld;
namespace LyraEditorUtilities
{
//////////////////////////////////////////////////////////////////////////
// returns true if the mesh has one or more degenerate triangles
bool CheckMeshDataForProblem(const Chaos::FTriangleMeshImplicitObject::ParticlesType& Particles, const Chaos::FTrimeshIndexBuffer& Elements)
{
// Internal helper because the index buffer type is templated
auto CheckTris = [&](const auto& Elements, int32 NumTriangles)
{
using VecType = Chaos::FTriangleMeshImplicitObject::ParticleVecType;
for (int32 FaceIdx = 0; FaceIdx < NumTriangles; ++FaceIdx)
{
const VecType& A = Particles.GetX(Elements[FaceIdx][0]);
const VecType& B = Particles.GetX(Elements[FaceIdx][1]);
const VecType& C = Particles.GetX(Elements[FaceIdx][2]);
const VecType AB = B - A;
const VecType AC = C - A;
VecType Normal = VecType::CrossProduct(AB, AC);
if (Normal.SafeNormalize() < SMALL_NUMBER)
{
return true;
}
}
return false;
};
const int32 NumTriangles = Elements.GetNumTriangles();
if (Elements.RequiresLargeIndices())
{
return CheckTris(Elements.GetLargeIndexBuffer(), NumTriangles);
}
else
{
return CheckTris(Elements.GetSmallIndexBuffer(), NumTriangles);
}
}
void CheckChaosMeshCollision(FOutputDevice& Ar)
{
for (UStaticMesh* MeshAsset : TObjectRange<UStaticMesh>())
{
if (UBodySetup* BodySetup = MeshAsset->GetBodySetup())
{
for (const Chaos::FTriangleMeshImplicitObjectPtr& TriMesh : BodySetup->TriMeshGeometries)
{
if (Chaos::FTriangleMeshImplicitObject* TriMeshData = TriMesh.GetReference())
{
if (CheckMeshDataForProblem(TriMeshData->Particles(), TriMeshData->Elements()))
{
UE_LOG(LogConsoleResponse, Warning, TEXT("Mesh asset %s has one or more degenerate triangles in collision data"), *GetPathNameSafe(MeshAsset));
}
}
}
}
}
}
FAutoConsoleCommandWithWorldArgsAndOutputDevice GCheckChaosMeshCollisionCmd(
TEXT("Lyra.CheckChaosMeshCollision"),
TEXT("Usage:\n")
TEXT(" Lyra.CheckChaosMeshCollision\n")
TEXT("\n")
TEXT("It will check Chaos collision data for all *loaded* static mesh assets for any degenerate triangles"),
FConsoleCommandWithWorldArgsAndOutputDeviceDelegate::CreateStatic(
[](const TArray<FString>& Params, UWorld* World, FOutputDevice& Ar)
{
CheckChaosMeshCollision(Ar);
}));
//////////////////////////////////////////////////////////////////////////
}; // End of namespace
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