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ComponentVelocity gets serialized, even though it is not accessible in the details panel

Somehow, some StaticMeshActors started to behave strange. I then realized by copying the actor and pasting into Notepad, that it stores a property "ComponentVelocity" on the StaticMeshComponent with some very high values, even though I certainly assume this is not the intention, as this value is not modifiable either per instance or in the default values.

The StaticMeshComponent's t3d text looks like this:

      Begin Object Name="StaticMeshComponent0"
         StaticMesh=StaticMesh'/Engine/BasicShapes/Cube.Cube'
         StaticMeshDerivedDataKey="STATICMESH_..."
         BodyInstance=(Scale3D=(X=2.000000,Y=2.000000,Z=0.250000),MassInKg=177.827942)
         RelativeLocation=(X=25000.000000,Y=200.000000,Z=5580.000000)
         Mobility=Movable
         RelativeScale3D=(X=2.000000,Y=2.000000,Z=0.250000)
         ComponentVelocity=(X=0.000000,Y=0.000000,Z=260393.031250) <-- WHY THIS ??
      End Object
      StaticMeshComponent=StaticMeshComponent0
      RootComponent=StaticMeshComponent0
      ActorLabel="Lift_2"
   End Actor
Product Version: UE 4.8
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asked Jul 20 '15 at 12:13 PM in Bug Reports

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qimmer
1 1 3

avatar image Lovecraft_K ♦♦ STAFF Jul 20 '15 at 04:00 PM

Hi qimmer -

Thank you for your report. We have assigned this issue to a member of our support staff, and they will begin investigation as soon as possible. If we are unable to reproduce the issue, or we need additional information, our staff member will comment here with additional questions. Otherwise, we will post an ‘Answer’ once we have logged the issue in our bug database or we have a solution for it.

In the meantime, please be sure to review our suggestions for how to report a bug, and feel free to edit your post if you have additional information to provide: https://answers.unrealengine.com/questions/12363/how-do-i-report-a-bug.html

Thank you -

Eric Ketchum

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Hi qimmer,

I've tried to reproduce this in our internal build of 4.9, but I'm not seeing this when I place a static mesh (CubeMesh) from the first person template content.

I've set the mesh to be movable as well as indicated by your file above.

  • Is this only happening with some meshes, or all?

  • Has this affected your assets in any discernible way?

Thank you!

Tim

My test asset viewed in Notepad:

 Begin Map Name=/Game/DM_Pkgd_Flicker_Test
    Begin Level NAME=PersistentLevel
       Begin Actor Class=StaticMeshActor Name=CubeMesh_4 Archetype=StaticMeshActor'/Script/Engine.Default__StaticMeshActor'
          Begin Object Class=StaticMeshComponent Name="StaticMeshComponent0" Archetype=StaticMeshComponent'Default__StaticMeshActor:StaticMeshComponent0'
          End Object
          Begin Object Name="StaticMeshComponent0"
             StaticMesh=StaticMesh'/Game/FirstPersonBP/Meshes/CubeMesh.CubeMesh'
             
             BodyInstance=(Scale3D=(X=5.000000,Y=5.000000,Z=5.000000),CollisionProfileName="BlockAllDynamic",MassInKg=816.016296,ObjectType=ECC_WorldDynamic)
             RelativeLocation=(X=-850.000000,Y=-110.000000,Z=360.000000)
             RelativeScale3D=(X=5.000000,Y=5.000000,Z=5.000000)
             Mobility=Movable
          End Object
          StaticMeshComponent=StaticMeshComponent0
          RootComponent=StaticMeshComponent0
          ActorLabel="CubeMesh"
       End Actor
    End Level
 Begin Surface
 End Surface
 End Map
 


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answered Jul 20 '15 at 09:47 PM

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Tim Hobson ♦♦ STAFF
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