[SCENE GRAPH VERSE] Mesh entered and exited event doesn’t fire on custom Static Mesh, but works on native UEFN Cube

[YanSteinhaus]

I’m using Scene Graph Verse and testing mesh_component.EntityEnteredEvent with the same code on two different meshes:

• a native UEFN Cube

• a custom Static Mesh capsule created in UEFN’s Modeling Mode.

The code works perfectly with the native Cube, but with my custom capsuleSM the EntityEnteredEvent is never fired.

I also confirmed that the mesh component is being found correctly in code, so the issue does not seem to be in the Verse logic itself.

What the code does

When one target entity touches another, the target should move to a new position to avoid overlapping the other entity. This is part of an aim-training mode where targets must respawn in a new location when they overlap.

The expected behavior is:

• entity A touches entity B

• EntityEnteredEvent fires

• the target runs ChangeHittedPosition()

• the target is repositioned so it does not overlap another target

What is happening

• The code works with the native UEFN Cube

• The same code does not work with my custom Static Mesh capsuleSM

• EntityEnteredEvent never fires on the custom mesh

• The mesh component is found correctly in code

• The mesh_component settings are already enabled:

  • Enabled = true

  • Collidable = true

  • Queryable = true

  • Visible = true

Code used

verse fortshoot_colision_vcomponent

using { /Verse.org }
using { /Verse.org/Native }
using { /Verse.org/SceneGraph }
using { /Verse.org/Simulation }
using { /UnrealEngine.com/BasicShapes }

fortshoot_colision_vcomponent<public> := class<final_super>(component):

    OnBeginSimulation<override>():void =
        (super:)OnBeginSimulation()

        if (MeshComponent := Entity.GetComponent[mesh_component]):
            Print("boxmesh_colision_vcomponent: mesh found")
            MeshComponent.EntityEnteredEvent.Subscribe(OnMeshEntered)
        else:
            Print("boxmesh_colision_vcomponent: mesh not found")

    OnMeshEntered(OtherEntity:entity):void =
#The print below no longer runs on the custom mesh. The code works fine with the native UEFN 'cube' mesh, so the problem isn't here on verse
        Print("boxmesh_colision_vcomponent: EntityEnteredEvent shooted")

        if (ShotgunComp := Entity.GetComponent[fortnite_shotgun_targetvcomponent]):
            Print("boxmesh_colision_vcomponent: shotgun component found")
            ShotgunComp.ChangeHittedPosition() 
        else:
            Print("boxmesh_colision_vcomponent: shotgun component not found")

verse fortnite_shotgun_targetvcomponent

using { /Fortnite.com/Devices }
using { /Fortnite.com/Characters }
using { /Verse.org/Simulation }
using { /Verse.org/SpatialMath }
using { /Verse.org/SceneGraph }
using { /UnrealEngine.com/Temporary/SpatialMath }
using { /Verse.org/Random }
using { /UnrealEngine.com/BasicShapes }

fortnite_shotgun_targetvcomponent<public> := class<final_super>(component):

    @editable
    var MaxTranslation<public>:float = 200.0

    OnBeginSimulation<override>():void =
        (super:)OnBeginSimulation()

    ChangeHittedPosition():void=
        HitEntity := Self.Entity
        if(Parent := HitEntity.GetParent[]):
            ParentTransform := Parent.GetGlobalTransform()

            RandomLeft := GetRandomFloat(-MaxTranslation, MaxTranslation)
            RandomUp := GetRandomFloat(-MaxTranslation, MaxTranslation)

            NewTranslation := ParentTransform.Translation + (/Verse.org/SpatialMath:)vector3{Forward := 0.0, Left := RandomLeft, Up := RandomUp}

            NewTransform := (/Verse.org/SpatialMath:)transform{
                Translation := NewTranslation
                Rotation := ParentTransform.Rotation
                Scale := ParentTransform.Scale
            }

            HitEntity.SetGlobalTransform(NewTransform)

What I need to know

I want to understand the exact configuration used by the native UEFN Cube so I can make my custom capsuleSM behave the same way.

Specifically:

• which Static Mesh Editor collision settings are required

• which settings allow EntityEnteredEvent to fire correctly on a custom Static Mesh

In short: the same code works on the native Cube, so I need to know how to configure my custom capsuleSM so it produces the same overlap behavior and EntityEnteredEvent starts firing correctly.

[EnebzVerse]

Can you verify that the mesh has a collision mesh to it? To check this, open the mesh asset, click the eye button, and check off “Simple Collision” and “Complex Collision”.

[YanSteinhaus]

@EnebzVerse

Can you verify that the mesh has a collision mesh to it? To check this, open the mesh asset, click the eye button, and check off “Simple Collision” and “Complex Collision”.

Yes, I checked that—the mesh asset has both Simple Collision and Complex Collision enabled (eye icon toggled).

Other scripts targeting this also rely on collision, and they work fine.

The core issue: Targets must never overlap when swapping positions. This logic works perfectly with the native “cube” mesh, but fails on my custom CapsuleSM (from modeling mode) or custom box. The EnteredEvent simply doesn’t fire on custom meshes.