I'm working on a project right now involving space ships flying in space. What I would LIKE to do is to animate their positions, and have the rotation change based on their flight path. My plan is to use a driver to set the rotation to the atan of the change in y over the change in x. However, in selecting variables, I only have access to the object's current position, not it's position relative to where it was in the last frame. The bonus point is that once I've gotten its Z-axis rotation fixed, I want to use that information to drive its X-axis rotation to create a banking effect, but this would also be based on the change in rotation, not it's current rotation.
So. As I'm creating expressions for the drivers, is there a way to access a property value from the previous frame, or to directly read the change in a value between the last frame and this?
Any help would be appreciated. Thank you!
Animation tools, character animation, non linear animation
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