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expression mapping rotation to scale
Hi,
I’m havibng a bit of difficulty trying figure out and expression for an animation I am working on.
I have set an object to wiggle in scale on the y axis, but I want to set a rotation parameter to the scale value wherein the larger the object is, the faster the object rotates (indefinitiely, on a loop). I was thinking I need to set a loop out expression from 0 to 360 degrees and somehow attatch the speed of the loop to the scale of the object. But I can’t figure out how to do it.
Any help would be greatly appreciated.
Thanks in advance,
-Adrian
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2 Replies
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You need some kind of multiplier that you drive using the scale. Thri this:
scale_Y=thisLayer.scale[1]; //actual Y scale of object
max_scale=100; //maximum allowed scale of object
min_scale=0; //minimum allowed scale of objectrotation_base=20; //constant basic permanent rotation
rotation_factor_max=5; //maximum multiplier for rotation
rotation_factor_min=1; //maximum multiplier for rotationrotation_factor=linear(scale_Y,min_scale,max_scale,rotation_factor_min, rotation_factor_max); //remaps scale to derive a actual multiplier
my_rotation=time*rotation_base*rotation_factor; //actual rotation driven by time
[my_rotation]
Cheers
Mylenium
[Pour Myl
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Thanks a lot. I’ll give that one a try. Looks like it may be what i need.
-AW
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