rotating an arc shape in 3D?

rstorm

rstorm

Active member
i have an arc shape layer that is part of a logo and i need to make it rotate via by the two end points of the arc, if that makes sense. basically what the arc represents is a jump rope in the logo. i want to animate it like someone is jump roping. i was able to rotate the arc in 3D already but it rotates on the z-axis on only 1 anchor point. how can i make it rotate on 2 anchor points?
i tried using the puppet tool which could work but i am not after that more natural 'warped' look it gives. i was hoping to just rotate the arc/rope in 3D around the stick figure graphic.

thanks,

rstorm
 
Not too sure if this is what you want (I not sure if I got the gist of your verbal description)...

You can rotate only on 1 anchor point. So one way around this might be to split your arc in 1/2 (i.e. a mirror image of sorts) , so that it exists on 2 layers, and move the anchor point of the 2nd layer to the far vertex
 
What do you mean two anchor points? Can you give an example of something you've seen? A jump rope would be something (in AE world) that would rotate around one anchor point.

Not sure I really understand the premise, but what about rotating it around one anchor point, pre-comping it, then rotating THAT around another anchor point?
 
cut the rope in half ; so left side is 1 layer , with left anchor point and right side is another separate layer, with right anchor point

I'm not sure what his "arc" looks like, but if this is to be done in 3D , I would use a 3D app like 3DSMax or Cinema4D . Because when the "rope" or "arc" is rotated and you see it edge on, you will see that it's a 2D layer in 2.5D space.
 
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If you're trying to animate an arc as if it's a jump rope, then you should only need 1 anchor point. Basically think of a full circle with the anchor point directly in the center. Then cut the circle in half, giving yourself the arc. Use the original anchor point and just rotate it on the x axis (or y, i often confuse the 2). Make sure your arc is a 3D layer. Also turn on motion blur to help sell the effect better. It will also make your layer appear less flat.

But if you're looking for a more realistic rope, then you really should use a 3D app.
 
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