Ghost collision bug

Davision
Tue, 27 Sep 2016 13:19:02 +0000
World Creation

I’m getting a bug where a collision gets traced that does not exist there. The ghost collision does not show up with show collision and the actor of that collision is placed elsewhere but it gets traced in that location where it is not located.
This is a welded child actor and it happens randomly with one of the child actors. That ghost collision seems to be stuck for forever, moving the actor of which the ghost collision is from does not move the ghost collision. The actor which has that ghost collision can still be traced normally and move normally, so it has 2 collisions, the regular collision and the stuck ghost collision. The ghost collision is also colliding with physics.

I think it is related to the attaching and welding of child actor collisions of which a bug has been fixed in 4.13 which might now created this new bug instead of it.
Here are my posts related to that bug:

Unreal Engine Forums – 24 May 16

Heavy performance killing bug with physics

It appears this bug can reduce the framerate to 0fps! I'm using a physics handle for grabbing objects and throwing them. These objects consists of actors which have just simple box collisions that are welded together. So like ca 10 box actors welded...

Unreal Engine Forums – 28 Dec 15

Physics Handle is broken

The component Physics Handle is hardly use able in its current state: Set Target Rotation doesn’t seem to do anything, the grabbed component will always spin around no matter what you do. When you try to force it to rotate with the player the result...

It would be much appreciated if this can be fixed in a new 4.13 version since I would really like to get this working after all this time and this bug is much more game breaking then the last one.

11 posts - 4 participants