Unreal Engine Issues
Unreal Engine Issues
It's possible to create a locked state on a rigidbody by creating a TransientField that will keep the rigdbody Sleeping even after it leaves the Field's area of influence
UE - Simulation - Physics - Sep 5, 2024The licensee found a way to lock the state of a rigidbody as PBDRigid->ObjectState() == EObjectStateType::Sleeping by subjecting it to a particular transient field composed of a RadialFalloff and a ...
Physics Linear Velocity functions from UPrimitiveComponent always return (0,0,0) velocity
UE - Simulation - Physics - Jul 30, 2024In Unreal Engine version 5.4, all Physics Linear Velocity functions inside PrimitiveComponent class are returning always a velocity of (0,0,0), even if the Body Instances are moving. This was workin ...
In UE 5.4, some config variables are not getting saved correctly, due to the new User/Editor rules.
UE - Simulation - Physics - Jul 24, 2024A lot of properties are not getting saved correctly to custom configuration files. This looks like that it can be cause by the FConfigContext::PerformLoad function. New conditionals have been added ...
Geometry Collections don't support any collision visualization modes (Collision, CollisionVisibility or CollisionPawn)
UE - Simulation - Physics - Jun 27, 2024Geometry collection objects do not display any collision visualization, either collision color or wireframe overlay when the view mode is set to Player Collision or Collision Visibility or when the ...
Get Velocity nodes with a specified bone return incorrect values
UE - Simulation - Physics - Jun 10, 2024Please note that a similar issue exists [Link Removed], however it is not the same, as this issue requires a bone to be specified in the node to occur. Leaving the Bone Name field as None or Root pr ...
City Sample vehicle does not always produce an EndOverlap Event
UE - Simulation - Physics - Apr 23, 2024Reported on UDN: Something in the setup of the City Sample vehicles means that if a vehicle starts inside a Box Collider Component then it won't generate an EndOverlap when exiting. Vehicles in ge ...
Clustering GeometryCollections in sleep state forces them to awake
UE - Simulation - Physics - Mar 27, 2024The sleep state will be overwritten in ClusterUnionManager::UpdateAllClusterUnionProperties. Clustering using AClusterUnionActor results the same behavior as well. ...
The AABBTree spatial acceleration structure goes off-sync when physics substepping is enabled in a "low" framerate environment.
UE - Simulation - Physics - Mar 15, 2024When you enable the physics substepping, if you run the console command p.Chaos.Solver.DebugDrawSpatialAccelerationStructure 1, you can see how does not follow the physical object. The user that rep ...
GeometryCollection clustered by ClusteredGroupIndex does not respect child's gravity setup
UE - Simulation - Physics - Mar 7, 2024Following code works as a workaround void FClusterUnionManager::HandleAddOperation(FClusterUnionIndex ClusterIndex, const TArray<FPBDRigidParticleHandle*>& Particles, bool bReleaseClustersFirst) ...
Nanite enabled Geometry Collection is not simulated by ChaosCache in package application
UE - Simulation - Physics - Feb 19, 2024When using ChaosCacheManager to simulate destruction of a GeometryCollection, destruction is not simulated when Nanite is ON for the GeometryCollection. In the editor, destruction is simulated rega ...