|  | Re: Ugh Rotation Keyframe Problem by Mark D. VanHorn on May 20, 2012 at 4:47:37 am |
1. Select your Empty.
2. Press Shift + S + 4 to move the 3D Cursor to the Empty's center.
3. Create a bezier circle, the size of the orbit of your orbiting object at the same location of your Empty.
4. Make your orbiting object "Track To" the bezier circle.
5. Go to your Editing (F9) window and make the the Path Length "1", and select "3D" to make the circle transparent.
6. Create a second Empty directly above the first Empty.
7. Parent the bezier circle to the second Empty.
8. Place the 3D cursor back on the first Empty (see steps 1 and 2).
9. Select the Rotation/Scaling Pivot option and make the Pivot Point the 3D cusror.
10. Select both the second Empty and bezier circle and select "R" + "55" (rotate both objects 55 degrees around the 3D cursor).
11. Select just the bezier circle.
12. Open Transform Properties window.
13. If the "RotZ" value indicates "0.00". Set a rotation keyframe. If not, change "RotZ" value to "0.00", then set the rotation keyframe.
14. If your object completes a full circle at (e.g., 250 frames), go to Frame 250, change RotZ to "360", set another rotation keyframe.
Optional:
1. Open the IPO Curve Editor window
2. Select the bezier circle, a blue line in the IPO circle Editor should appear representing the rotation of your orbit. If it is S-shaped, proceed to step 3, if it is straight, go to step 4.
3. Select Curve->Interpolation->Linear. The blue line should straighten out, keeping your orbit smooth.
4. Select Curve->Extend Mode->Extrapolation
This keeps the orbit smooth and the rotation going as long as you want.
Mark
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