Viewpoint Collision Issue

[kmkm]

Hello,

I have created an fMRI task in which the user navigates forward and is stopped by colliding with an invisible torus. The collision with the torus pauses navigation and brings up a screen with text. After a keypress, the screen and torus go away and navigation is reenabled.

This was all working well when I was using a joystick, but now I have switched to keyboard 6DOF navigation and on some trials the viewpoint continues to move even after it has collided with the torus. I have attached the code below. I realize it is probably very messy, but I would appreciate any help you can give.

Thanks,
Kelly


[Note, after the end screen with the "+" you must press "t" to continue"