[SCENE GRAPH] Set Local Transform Issue

Zablabior · May 12, 2026, 5:14am

Summary

If an entity has a defined entity origin, calling Set Local Transform will only work once. Any subsequent calls to this function will have no effect until a new entity origin is set using Set Origin.

After a new origin is defined, Set Local Transform can be applied again — but, once more, only for a single call.

using { /Fortnite.com/Devices }
using { /Verse.org/Simulation }
using { /Verse.org/SceneGraph }
using { /Verse.org/SpatialMath }
using { /UnrealEngine.com/Temporary/Diagnostics }
using { /UnrealEngine.com/Temporary/SpatialMath }



entity_local_transform_bug_report := class(creative_device):

    @editable OriginEntityTransformProp<private> : creative_prop = creative_prop{}

    OnBegin<override>()<suspends> : void =
        OriginEntity := Prefabs.PF_Sphere{}
        ChildEntity := Prefabs.PF_Cube{}
        OriginEntity.SetGlobalTransform(FromTransform(OriginEntityTransformProp.GetTransform()))
        ChildEntity.SetOrigin(entity_origin. Entity := OriginEntity)
        # First call.
        ChildEntity.SetLocalTransform((/Verse.org/SpatialMath:)transform{})
        (GetSimulationEntity[] or Err()).AddEntities(array{OriginEntity, ChildEntity})
        loop:
            Sleep(1.0)
            Print("Updating ChildEntity's local transform...")
            LocalTransform := ChildEntity.GetLocalTransform()
            # Subsequent calls do not work unless the origin is defined again.
            # ChildEntity.SetOrigin(entity_origin. Entity := OriginEntity)
            ChildEntity.SetLocalTransform of:
                (/Verse.org/SpatialMath:)transform:
                    Translation := 
                        (/Verse.org/SpatialMath:)vector3:
                            Up := LocalTransform.Translation.Up + 25.0

Please select what you are reporting on:

Creative

What Type of Bug are you experiencing?

Verse

Steps to Reproduce

1 - Create two entities.
2 - Set the origin of one of the entities to be based on the other (SetOrigin).
3 - Add both entities to the simulation.
3 - Call Set Local Transform on the “child” entity.
4 - Try call it again with a different transform.

Expected Result

All calls to Set Local Transform should take effect.

Observed Result

Only the first call to Set Local Transform takes effect.

Platform(s)

PC

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Video

Showing the problem:

Redefining the origin in every iteration of the loop: