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Rotation speed linked to motion return to zero
I found this old expression from JJ Gifford’s website.
Basically what I’d like to do is modify it so that my circles return to 0 when they’ve finished animating instead of ending up rotated all wonky. The circles are animating in the X position from point A to point B, then back again. Any thoughts?
circumference=width*( scale[0]/100)*Math.PI;distance=position[0];
(distance/circumference)*360
Jason Jantzen
vimeo.com/jasonj -
5 Replies
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Try this one:
circumference=width*( scale[0]/100)*Math.PI;
distance=position[0];
rot = (distance/circumference)*360
while (rot>360) {
rot -=360;
}
[rot]– – –
SXPER RENDER – After Effects Render Script
http://www.jxrgen.at/sxper-render-after-effects-script/ -
simpler:
circumference=width*( scale[0]/100)*Math.PI;
distance=position[0];
(distance/circumference)*360 % 360
– – –
SXPER RENDER – After Effects Render Script
http://www.jxrgen.at/sxper-render-after-effects-script/ -
Thanks for taking a crack at it! But it still ends up settling in a wonky rotation angle.
Jason Jantzen
vimeo.com/jasonj -
You might just need a reference position. Try changing you second line to this:
distance=position[0] – position.valueAtTime(inPoint)[0];
Dan
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Thanks Dan, but that gets the circle to start at 0 degrees and then roll forward the appropriate amount. What I’m trying to do is get the circle to end on 0 degrees. That way I can inflect any amount of bounce back using just the position and not worry about getting the rotation right.
Jason Jantzen
vimeo.com/jasonj
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