Unreal Engine Issues

Chaos : Rigid body sleeps when very small external force is applied by AddForce

When a small external force is applied to the rigid body, the VSmooth value is reset in the ResetVSmoothFromForces function. Since this function ignores the current velocity, a very small velocity ...

Chaos Cloth Self Collisions Spatial is slow when Tris are much smaller than thickness

This came via a UDN. Very small triangles can generate very small lods, which make query time really slow if your self collision thickness is significantly larger. You will do X^3 checks per query ...

Issue when sampling landscape height at a given location using Chaos::FHeightField::GetHeightAt

This is an issue reported from a licensee: When sample landscape height at a given location, it is likely we interpolate from the wrong triangle. [Image Removed] Details in: [Link Removed] ...

Chaos-enabled projects will disable Post Process Volume with sphere tessellation of 4 or higher

Assertion with Geometry Collection when play in simulate mode

Error message:Assertion failed: !HasAttribute(Name, Group) [File:D:\CHAOS\Engine\Source\Runtime\Experimental\Chaos\Public\GeometryCollection/ManagedArrayCollection.h] [Line: 121] ...

A welded hierarchy blocks updates to collision settings on all but the root primitive. Calling SetCollisionResponseToChannel on the children won't work.

A welded hierarchy blocks updates to collision settings on all but the root primitive. Calling SetCollisionResponseToChannel on the children won't work. The licensee noticed that IPhysicsProxyBase* ...

The Remove-On-Break feature, set on Fracture Mode on Geometry Collections, stops shrinking and shows strange behaviors

The Remove-On-Break (ROB) feature, set on Fracture Mode on Geometry Collections (GC), was supposed to make the particle shrink until it vanishes. When the GC goes to sleep the shrinking stops and sh ...

ChaosWheeledVehicleMovementComponent is breaking the const CDO contract and changes to the instances are being applied to the CDO

As described by the licensee, the const CDO contract is being broken on ChaosWheeledVehicleMovementComponent. The issue the licensee is facing is that by spawning cars with different configurations, ...

Assertion failed: Engine crushes when a geometry collection hits a landscape

This is because THeightField::PhiWithNormal has not been implemented yet. ...

Crash when destroying a geometry collection actor

When an actor with geometry collection is destroyed, the engine doesn't remove elements from array in the ChaosSolver So illegal references occurs. Removing element with following quick fix code ...