[1.12.2] controllable camera

I'm trying to let the player control an invisible dummy entity (from first person, i.e. just a camera).

I'm using setRenderViewEntity() to set it, and intercepting MovementInput to move it. 

The only problem I'm having, aside from some choppy movement issues, is that I can't seem to get the camera to rotate properly. I can't seem to find an event that handles mouse movement (as opposed to mouse button presses).. I've tried copying the players rotationYaw / rotationPitch, but after I've done setRenderViewEntity(), they seem to stay static. Any ideas? Or if anyone knows where mouse movement is processed into rotationYaw/rotationPitch for the player so I can look at the code for it and see if its doable to copy it somewhere?

Edited August 2, 20196 yr by stepsword