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Y rotation incrementally
I havent really got a clue about how to do this , although i know it must be simple all my somewhat impotent attempts have failed. It seems a perfect situation for using a simple expession (and learning a little about how to write them ) if any kind soul is prepared to help me.
Here goes.I have a Character in 3D which i want to rotate by -180 on the y axis (revealing the character behind it). The rotation is over say 5 frames. Then I wish to hold this postion for 15 frames and rotate through -180 again.Then hold then rotate for about 10 seconds on total . Whilst it would be easy to keyframe it manually adding -180 each time it seem ideal for writing an expression, BUT how ??????
Thanks
MP
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4 Replies
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How about just keyframe one complete cycle and then use a loopOut(“cycle”) expression?
Dan
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DOH !!!
thanks Dan, sometimes it just seems more fun to overcomplicate things.
Loop out cycle works fine. But if say my complete rotation was in smaller increments how could i save myself the keyframing. I lokked at the answers below to animating the hand of a clock but it didnt help me much.
Anyway many thanks
Chris
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OK – say you wanted it to rotate -30 over 5 frames, hold hold 15 frames, repeat forever. Something like this should do the trick:
rotateAmount = -30;
rotateFrames = 5;
holdFrames = 15;
f = Math.round(time/thisComp.frameDuration);
period = Math.floor(f / (rotateFrames + holdFrames))
phase = f%(rotateFrames + holdFrames);
rotateAmount * period + linear(phase,0,rotateFrames,0,rotateAmount)Dan
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Thank you very much
i will look into this
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