This is a trending crash coming out of the 4.18 release. Users have not provided any descriptions of their actions when the crash occurred.
The error message and callstack closely matches to past Jiras, [Link Removed], [Link Removed], [Link Removed]
Source Context
1942 FVector FMath::ComputeBaryCentric2D(const FVector& Point, const FVector& A, const FVector& B, const FVector& C) 1943 { 1944 // Compute the normal of the triangle 1945 const FVector TriNorm = (B-A) ^ (C-A); 1946 1947 //check collinearity of A,B,C 1948 check(TriNorm.SizeSquared() > SMALL_NUMBER && "Collinear points in FMath::ComputeBaryCentric2D()"); 1949 1950 ***** const FVector N = TriNorm.GetSafeNormal(); 1951 1952 // Compute twice area of triangle ABC 1953 const float AreaABCInv = 1.0f / (N | TriNorm); 1954 1955 // Compute a contribution 1956 const float AreaPBC = N | ((B-Point) ^ (C-Point)); 1957 const float a = AreaPBC * AreaABCInv; 1958 1959 // Compute b contribution 1960 const float AreaPCA = N | ((C-Point) ^ (A-Point)); 1961 const float b = AreaPCA * AreaABCInv; 1962 1963 // Compute c contribution 1964 return FVector(a, b, 1.0f - a - b); 1965 }
repro steps currently unknown
Assertion failed: TriNorm.SizeSquared() > SMALL_NUMBER && "Collinear points in FMath::ComputeBaryCentric2D()" [File:D:\Build\++UE4+Release-4.18+Compile\Sync\Engine\Source\Runtime\Core\Private\Math\UnrealMath.cpp] [Line: 1949] UE4Editor_Core!FMath::ComputeBaryCentric2D() [unrealmath.cpp:1951] UE4Editor_Core!FMath::SegmentTriangleIntersection() [unrealmath.cpp:1681] UE4Editor_MeshPaint!FMeshPaintGeometryAdapterForSkeletalMeshes::LineTraceComponent() [meshpaintskeletalmeshadapter.cpp:223] UE4Editor_MeshPaintMode!FPaintModePainter::GetHitResult() [paintmodepainter.cpp:572] UE4Editor_MeshPaint!IMeshPainter::RenderInteractorWidget() [imeshpainter.cpp:174] UE4Editor_MeshPaint!IMeshPainter::RenderInteractors() [imeshpainter.cpp:41] UE4Editor_MeshPaintMode!FPaintModePainter::Render() [paintmodepainter.cpp:126] UE4Editor_MeshPaint!IMeshPaintEdMode::Render() [imeshpaintmode.cpp:379] UE4Editor_UnrealEd!FEditorModeTools::Render() [editormodemanager.cpp:837] UE4Editor_UnrealEd!FEditorViewportClient::Draw() [editorviewportclient.cpp:3591] UE4Editor_UnrealEd!FLevelEditorViewportClient::Draw() [leveleditorviewport.cpp:4012] UE4Editor_Renderer!FSceneRenderer::FSceneRenderer() [scenerendering.cpp:1398] UE4Editor_Renderer!FDeferredShadingSceneRenderer::FDeferredShadingSceneRenderer() [deferredshadingrenderer.cpp:217] UE4Editor_Renderer!FSceneRenderer::CreateSceneRenderer() [scenerendering.cpp:1766] UE4Editor_Renderer!FRendererModule::BeginRenderingViewFamily() [scenerendering.cpp:2246] UE4Editor_UnrealEd!FEditorViewportClient::Draw() [editorviewportclient.cpp:3460] UE4Editor_Engine!FViewport::Draw() [unrealclient.cpp:1207] UE4Editor_UnrealEd!UEditorEngine::UpdateSingleViewportClient() [editorengine.cpp:2046] UE4Editor_UnrealEd!UEditorEngine::Tick() [editorengine.cpp:1791] UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [unrealedengine.cpp:396] UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:3296] UE4Editor!GuardedMain() [launch.cpp:166] UE4Editor!GuardedMainWrapper() [launchwindows.cpp:134] UE4Editor!WinMain() [launchwindows.cpp:210] UE4Editor!__scrt_common_main_seh() [exe_common.inl:253] kernel32!BaseThreadInitThunk() ntdll!RtlUserThreadStart()
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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-51917 in the post.
| 0 |
| Component | UE - Simulation - Physics - Character |
|---|---|
| Affects Versions | 4.18 |
| Target Fix | 4.18.1 |
| Fix Commit | 3743601 |
|---|
| Created | Nov 2, 2017 |
|---|---|
| Resolved | Nov 8, 2017 |
| Updated | Apr 27, 2018 |
| 4447 - klorberg |