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Problem getting one object to "orbit" around another

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Joseph M. MorganProblem getting one object to "orbit" around another
by on Nov 3, 2005 at 12:03:05 am

I created a nice logo in the Zax plugin (AE 6.5, Zax Pro AE). I thought it would be a really nice effect to create two simple spheres and then have them "orbit" the logo. I can't get it work. The spheres fly about wildly, even though I was very meticulous about trying to ensure they would rotate ( oposite of one another ) correctly. I suspect I am trying too hard.

So, I created a new project with the Earth-Moon concept. I created the beginning keyframes, and "orbited" the moon half-way around the earth half way through the comp (creating keyframes there). Then I set keyframes at the end to match that of the first ( so the moon ends up at it starting point at the end of the comp ). The moon orbited nicely to the halfway point, but then reversed to its starting point, rather than continuing around behind it.

So, I created keyframes 3/4 of the way, then "orbited" the moon to roughly half-way behind the earth, thinking it would choose the closest path. Nope. It now orbits 3/4 of the way, then reverses it's path back around front to the starting point. As an experiment, I put keyframes one frame before the end and "orbited" the moon to just before the starting point. Amazingly, it orbits smoothly, and then quickly reverses itself.

How do I create a "correct" smooth orbit?

Joe


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SergeRe: Problem getting one object to "orbit" around another
by on Nov 3, 2005 at 12:09:08 am

Hi,

Send me your project: serge at nyc-visual dot com

Don't include the textures just the aep.

Salut.
Serge


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Joseph M. MorganRe: Problem getting one object to "orbit" around another
by on Nov 3, 2005 at 12:19:01 am

The earth and moon one, or the logo. If the logo, will you need the .ai files for the various 3D objects withn it?


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sergeRe: Problem getting one object to "orbit" around another
by on Nov 3, 2005 at 12:27:35 am

The ai files are not necessary as long as you already opened them in Invigorator they will show up once I open your aep.

Salut.
Serge


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sergeNew e-mail address
by on Nov 3, 2005 at 12:50:16 am

Joseph, Please discard the e-mail address I gave you and send your project to [serge_01 at msn dot com]
Sorry for that but my server is down for the moment.
I will check your file as soon as my render is done.
Salut.
Serge


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sergeMini Tut inside
by on Nov 3, 2005 at 3:39:56 am

Hi Joe,

I had a look at your project and quickly made the following tutorial for you:
http://www.nyc-visual.com/common_pivot.mov

Let me know if you still have questions.

Salut.
Serge


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Joseph M. MorganRe: Mini Tut inside
by on Nov 3, 2005 at 3:55:39 am

Thanks Serge... As I suspected, I was trying way too hard.

I should be able to get it now.

Thanks again
Joe


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