Convert Camera Animation to World Animation

[fccool]

I have a unique need to convert camera animation into world group animation.   I've heard about this done in tracking, just don't know the correct search term.   Basically need to have scene animated around the camera from camera that's animated around the scene.

Thank you for any input.

[joojaa]

Its just the inverse transformation of the camera to the group*. You can do this by re jigging (instead of connecting to the matrix connect to inverse matrix) the connections in a parent constraint.

Then bake down the keys. As a result the keys will not make sense in graphs anymore tough, so you will loose the ease of use in the graph editor tough (no you cant just convert the individual keys, interpolation is affected im afraid). So you may want to keep the original.

• this rresults in stationary camera looking in -z direction

PS: by the way each and every time you refresh a viewport and render anything, something alonmg this gets done. So the computer is doing this multiple times each second anyway.

[fccool]

Thank for the tip!  I don't think loosing the keys is a problem, since the cam animation is pretty much locked.  Just need to transfer the animation to our OpenGL app that does not support camera rotation import, so need to rig my way around it.  I've never actually dove into the details...  but just to get it right...

1)  I have camera animation
2)  Constrain a group to the animation via parent constrain
3)  re-wire parentMatrix to ParentInverseMatrix using connection editor

Am I on the right track?

Thank you for your help, once again.