Unreal Engine Issues
Unreal Engine Issues
GeometryCollectionActor SetSimulatePhysics false does not stop Physics Simulation
UE - Simulation - Physics - Nov 28, 2024If the GeometryCollectionActor (GCA) is simulating physics, calling SetSimulatePhysics(false) does not stop the simulation. If the simulation is paused, calling SetSimulatePhysics(true) does as expe ...
Geometry Collection crashing BP Simulation when set to enable Physics via Event Graph
UE - Simulation - Physics - Destruction - Dec 2, 2022Reproduced 3/3 times, issue also occurs in //UE5/Release-5.0 - CL 20979098 Binary. Confirmed NOT a Regression. Issue does not occur when user Simulates in level viewport, nor when geometry collecti ...
Changing the state of a PrimitiveComponent->BodyInstance while SetSimulatePhysics(false) updates the game thread but does not update the physics behavior
UE - Simulation - Physics - Nov 21, 2024Changing the state of a PrimitiveComponent->BodyInstance while SetSimulatePhysics(false) updates the game thread but does not update the physics behavior. In the repro project provided (see addl in ...
Scaled Geometry Collection made from non-basic Static Mesh Crashes Editor
UE - Simulation - Physics - Destruction - Nov 14, 2022Reproduced 3/3 times. So far tested with the Chair and Statue from the Blank Template Editor Default level. Error Reads as follows:Assertion failed: IsValid() [File:D:\build\++UE5\Sync\Engine\Source ...
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 ...
Enabling Collision on a Spline Mesh component with a Static Mesh assigned causes an assertion to fail while executing in a package
UE - Simulation - Physics - May 4, 2022Enabling Collision on a Spline Mesh component with a Static Mesh assigned causes an assertion to fail while executing in a package. This does NOT occur if you play in editor. Repro Rate: 4/4 Teste ...
Crash calling destroy actor for Geometry Collection while it's simulating
UE - Simulation - Physics - Destruction - May 12, 2020Crash occurs when user call Destroy Actor on a Geometry Collection Actor. This seems to only occur while the actor is simulating. If called while on the ground, it doesn't seem to occur. ...
Vehicle Template with Thruster Configuration will be affected by force relative to the distance from the origin
UE - Simulation - Physics - Mar 18, 2025Vehicle Template vehicle with added Thruster Configuration to its VehicleMovementComponent will be affected by force relative to the distance from the origin. At around 200000 the force is enough to ...
[AI] Incorrect collision for USplineMeshComponent
UE - Framework - Apr 15, 2024The collision for a spline mesh can be calculated incorrectly. The issue appears to be when Alpha is out of range when calculating the slice transforms at splice offsets. ...
Geometry Collection Cache Mode recording that has shattered on the ground shows that Collection Freeze when switched to Play and simulating again
UE - Simulation - Physics - Oct 24, 2022Cache Mode: record seems to simulate fine, in Cache Mode: Play, the object does not simulate fracturing Repro Rate: 5/5 ...