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spinning wheels

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Gabi Bucataruspinning wheels
by on Jul 31, 2013 at 7:30:29 pm

Hi Gang!

I have a more strategic question on how to make the 3 wheels (in the middle of the logo) spin around their own center as well as the three wheel group spin around on its center.



1. I do have the logo in a illustrator format. How should I import the .ai file - as composition with cropped layer (AE CS4)?

2. Should I precomp the wheel, make it spin then use it to make the three wheel group, precomp that and make it revolve around its center?

I played with it a little in AE and the issue I am having is to match the layer anchor centers with the wheel centers.

Curious of your suggestions...

thanks!
Gabi


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Gabi BucataruRe: spinning wheels
by on Jul 31, 2013 at 8:48:54 pm

Ok, folks I managed to have this working... partially:



I am using the loopOut("offset") on each wheel's rotation property with two keyframes set at the beginning and end of time (0 degrees and 359 respectively).

The problem is that the wheel that should actually follow the logical group movement is not spinning if I set a negative rotation degree on the end keyframe.

All the others are spinning happily but... in the wrong direction.

I am subcomping the group of three wheels, and then each wheel separately.
One interesting aspect is that in the wheels group subcomp the problem wheel is spinning just fine.
It's in the main comp where I use loopOut("offset") on the wheels group subcomp rotation the problem wheel with the negative rotation is stuck.

Thanks!
gabi


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Tudor "Ted" JelescuRe: spinning wheels
by on Aug 1, 2013 at 6:54:27 am

I am a bit unsure as to why you are pre-compositing your elements. This should be quite straightforward: import ai file with cropped layers, double check the anchor point, create a Null with the anchor point in the center of the 3 wheels, link rotation property from all wheels to this Null, add offset and / or negative in the expression and animate away the rotation of the Null.

Tudor "Ted" Jelescu
Senior VFX Artist


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Gabi BucataruRe: spinning wheels
by on Aug 2, 2013 at 4:33:39 pm

Tudor!

Thank you! This is very clever.

So, I got this far:

1. Centered the wheel layer anchor points and duplicated it 2 more times.
2. Arranged the 3 wheels and pickwicked each of their rotation property to the null's rotation property.

When I rotate the null they are spinning nicely around their axes.

I got stuck here:

- How to spin the 3-wheels group around the center axis
- where to place the loopOut("offset") to loop the animation

thanks!

gabi


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Tudor "Ted" JelescuRe: spinning wheels
by on Aug 3, 2013 at 2:41:02 pm

Here's a quick test I did - hope it helps.

6364_gearsrotationtestfolder.zip

Tudor "Ted" Jelescu
Senior VFX Artist


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Tudor "Ted" JelescuRe: spinning wheels
by on Aug 3, 2013 at 2:46:23 pm

It just dawned on me that you may not have the latest AE - so here's a CS6 version of the project:

6365_gearsrotationtestcopycs6folder.zip

Tudor "Ted" Jelescu
Senior VFX Artist


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Gabi BucataruRe: spinning wheels
by on Aug 4, 2013 at 2:17:24 am

Tudo!!!

Thanks a bunch! this is exactly IT! You nailed it with such simplicity! And thanks for the CS6 version indeed :-)

cheers!
Gabi


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