I am trying to animate a shape key oscillating between -1 and 1 by driving it with the expression "sin(frame)".
I would expect that to result in the shape key value being "0" at frame 0 and 180, a value of "1" at frame 90, and a value of "-1" at frame 270.
Instead, I am getting a very rapid oscillation which never becomes negative, and has bizarre values that I wouldn't expect. The sin of 1° is 0.017, so I would think the sin of 1 frame is 0.017, but instead it is resulting in 0.841.
Thank you for your help! -Ben