How to control 3d rotation axis?

TeetimeNC wrote on 10/1/2009, 7:27 AM

I am trying to do a simple 3d rotation, but can't get the desired result. When I rotate an event 180 degrees about the Y axis, the event appears to shift a bit along the X axis. I want it to rotate about its center. Any suggestions?

Here is an example of what it is doing: http://s697.photobucket.com/albums/vv334/teetime17/?action=view&current=3dPanelRotation.flv

Here is my setup. The only change at the keyframe is the Y rotation changes from 0 to 180.

EDIT: Changed "orientation" to "rotation"

Thx, Jerry

Comments

TheHappyFriar wrote on 10/1/2009, 9:00 AM

use the rotation instead, see if that works.

but it works, I've done it dozens of times before.

TeetimeNC wrote on 10/1/2009, 9:13 AM

Sorry, I meant rotation, not orientation. I did use rotation and if you look at my example clip, it clearly moves off axis during the rotation.

TheHappyFriar wrote on 10/1/2009, 10:41 AM

oh. that looks fine to me. odds are you're thinking it's wrong because of the perspective.

FrigidNDEditing wrote on 10/1/2009, 11:40 AM

I'd say, it could be an optical illusion because it's so close, and Vegas doesn't allow for a lens perspective modification. I'd actually put a vertical stripe in the middle and see if it actually moves left to right, or if it just looks that way.

Dave

TeetimeNC wrote on 10/1/2009, 11:51 AM

odds are you're thinking it's wrong because of the perspective.

Yes, you are right. The perspective is inappropriate for the effect I am trying to achieve. I want to have a matrix of cards that individually flip 180 degrees to display a message (sorta like the trick you've seen at football games where a section of the stadium holds cards over their head and on cue flip them to show a message.

I don't think there is a way to overcome the perspective in Vegas since there is no concept of a camera and lense which would allow me to place the card at a distance and zoom in to flatten the perspective. Looks like a job for After Effects.

Jerry

rs170a wrote on 10/1/2009, 12:53 PM

See if John Rofrano's tutorial called 3D Track Motion: Changing the Pivot Point is of any help.

Mike

FrigidNDEditing wrote on 10/1/2009, 1:29 PM

I'm pretty sure you're looking at something that would be far easier in AE of that there's no doubt. just export a PNG seq. back to vegas and then if you need to change small sections you can re-render only what needs to be changed and it will replace just those frames.

that's my standard AE + Vegas workflow, though Frameserving works well also.

Dave

TheHappyFriar wrote on 10/1/2009, 6:13 PM

if you want it at a distance, just move it back on the z.

or don't even mess with 3d & do 2d & shrink the whole track. It looks like it's farther back then.

Rory Cooper wrote on 10/1/2009, 10:41 PM

Jerry

I could not access your clip .
e-mail me a veg ..i can have a squizz and see if I can help in some way
roryc@tsogosun.com

I can visualize what you want to accomplish
Make your panels square in track motion this might lesson the distortion

Rory