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Camera problem in rolling ball game with custom gravity direction (gimbal lock?)

So, I've been working on creating a rolling ball game with a dynamic gravity system and have run into a problem.

I trace to the ground to get the angle of the floor the pawn is on and with "make rotation from axes" create a new rotation for the camera so that the new ground is the new "down" direction. The problem is now that if I try to move the camera it moves relative to the world and not relative to the new plane.

Here's a small video to illustrate the problem: https://www.youtube.com/watch?v=lv5x_IdLYt0 And here's my blueprint: http://imgur.com/a/YxMQw

I guess what I am looking for is a camera control scheme that moves the camera relative to a custom plane, but I can't get it to work. I tried implementing this: https://answers.unrealengine.com/storage/temp/42501-upvectorzero.jpg but it didnt work.

Product Version: UE 4.12
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asked Jun 12 '16 at 03:10 PM in Blueprint Scripting

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