Unreal Engine Issues
Unreal Engine Issues
Geometry collection - source geometry not updating and reset bug
UE - Simulation - Physics - Aug 17, 2023This issue was reported by a customer trying to modify the static meshes of a GeometryCollection. After removing some meshes from the Geometry Source, he used the Reset button to apply the changes t ...
After attach a component to a simulated component by socket miss collisions
UE - Simulation - Physics - Jun 9, 2023If attaches a StaticMeshComponent with collision active to another actor with a SkeletalMeshComponent simulating physics by socket name the StaticMeshComponent miss collision for simulation. Chec ...
Chaos Vehicles - Wheel physics bounds staying in spawn location on server
UE - Simulation - Physics - Jun 9, 2023Vehicle wheel shapes on the server appear to detach from the vehicle and remain at their spawn point when running a networked game. The clients physics representation is ok and as expected, i.e. whe ...
GeometryCollectionComponent take +1 frame to be marked as dirty
UE - Simulation - Physics - May 25, 2023Debugging the code I have been able to verify that in GeometryCollectionComponent.cpp line:2318, the if condition happens every two frames. I think DynamicCollection is not setting all the frames a ...
SetAllBodiesBelowPhysicsDisabled functionality appears to leave bodies behind that raycasts can still interact with.
UE - Simulation - Physics - May 9, 2023From UDN We use SetAllBodiesBelowPhysicsDisabled() to disable some bodies of our Vehicle. However by drawing the disabled bodies' particles position, we found those particles stay where they disab ...
Cable Actor resets to initial end point position when moving the actor while Attach End is disabled
UE - Simulation - Physics - Apr 4, 2023This is a regression. Tested in //UE5/Release-5.1 CL23901901 Additionally, I placed the cable actor in a sequencer then keyed several changes in position. The Cable actor had the same behavior of r ...
OnComponentHit Event is not triggered when hit by a spawned actor with simulate physics enabled for WheeledVehiclePawn with BoxCollison
UE - Simulation - Physics - Feb 20, 2023BoxCollison's OnComponentHit event is not triggered when BoxCollison hits a spawned actor with simulate physics enabled. The event is triggered if the same actor has been placed in the level beforeh ...
Trace to complex collision returns incorrect PhysicalMaterial
UE - Simulation - Physics - Dec 15, 2022In ConvertQueryImpactHitImp, MaterialIndex is looked up from InternalFaceIndex, but FTriangleMeshImplicitObject:: MaterialIndices is an array by ExternalFaceIndex, so it returns incorrect material i ...
[CrashReport]UnrealEditor-Chaos!Chaos::FPhysicsSolverBase::GetExternalDataLock_External() [PhysicsSolverBase.h:677]
UE - Simulation - Physics - Nov 29, 2022Generated from CrashReporter ...
SetOneWayInteraction functionality has no effect on the simulation
UE - Simulation - Physics - Nov 11, 2022Calling SetOneWayInteraction on a BodyInstance has no effect within the physics engine. The state of the flag is passed in to Chaos but nothing actually uses the value once it is there. It is expe ...