It zooms out, pans to the side and toward the player.
Loop Center thing:
- arg2: zoom-out speed in tics (zooms out when entering the loop)
- arg3: zoom-in speed in tics (zooms in when exiting the loop)
- arg4: zoom-out distance in fracunits (multiply by 65536)
- arg5: angle to pan to the side of the loop in degrees fracunits (multiply by 65536)
- This will be flipped depending on where the camera was
facing before entering the loop.
- arg6: panning speed in degrees fracunits (multiply by 65536)
- arg7: panning acceleration in tics (camera gradually pans to side of loop)
- arg8: panning deceleration in tics (camera gradually pans back to normal)
- Players moving into a gate with a lot of momentum would
offset the origin point from its intended position
- Find intersection of player movement and gate
- Correct origin point between loop entry and exit by
interpolating the difference between player position on
entry and intersection point
