Comments

Jay Gladwell wrote on 8/4/2006, 4:17 AM

You could, using Track Motion, it would be awfully time consuming to do. Why not just buy a background that rotates?


Chienworks wrote on 8/4/2006, 4:22 AM
Pan/Crop makes this trivially easy. Zoom in slightly so that the frame will always be inside the background image no matter what the rotation angle is. Set a keyframe at the end and enter a rotation angle. The image will now spin as it plays.
Jay Gladwell wrote on 8/4/2006, 4:25 AM

Or...

Do what Kelly suggests.


bevross wrote on 8/4/2006, 7:15 AM
Wouldn't you also have to use Track Motion? Pan/crop to resize and rotation angle is found in Track Motion. "Trivally easy" to get basic motion but I suppose takes some experience to get beyond trivial effects.

Grazie wrote on 8/4/2006, 9:10 AM
I've been saving this till later today - before I go t'pub.

In the example it shows the Sunburst thingie having a rotating BUT perspective.

I've just done this with Sony Chequerboard and used Pan/Crop Rotation on the event AND 3-D Track Motion to give a Perspective .. and it is rotating.

. ..
Grazie wrote on 8/4/2006, 9:33 AM
Actually .. another way is to have 2 tracks.

T1 - Parent TM Track

T2 - Child Generated Media Event

On the GenMed Apply anything that will give you some form of Sunburst . .I'm using LensFlare

Apply Rotation and Perspective to T1, then T2 will spin its Sunburst Lensflare - it works. And looks much better than the sample! Good ole Vegas!
Chienworks wrote on 8/4/2006, 10:14 AM
bevross, I suppose you could use track motion if you want to. It's not necessary though. I find Pan/Crop to be more reliable for this sort of thing. Pan/Crop also loses less quality when zooming and resizing.
bevross wrote on 8/4/2006, 12:19 PM
Chienworks: Sorry, the mpg link given at the top of the topic doesn't open for me but I presumed the question was about 3D motion? Does Pan/Crop do 3D rotation?
grh wrote on 8/4/2006, 2:30 PM
Unfortunately, the angle in Pan/Crop has a limit of (IIRC) -1440 to 1440 degrees, or a total of 8 revolutions. I'm not sure if track motion is different.

FWIW, I could have these two backwards, but there's a limit in there somewhere.
Grazie wrote on 8/4/2006, 2:49 PM
If you want more then pull the event and it will loop!
Chienworks wrote on 8/4/2006, 6:01 PM
bevross, no, the sample was a simple 2D rotation.
Chienworks wrote on 8/4/2006, 6:06 PM
grh: that's not much of a limitation. Say you wanted the rotation to last 1/2 a second at 30fps ... set the first keyframe at 0 degrees and then set one at frame 14 at 336 degrees. Then repeat 0° and 336° at frames 15 and 29, etc. Or, to do a little less work, set -1440° at frame 0 and 1416° at frame 239, then repeat at frames 240 and 479, etc.

Oh, and set keyframe smoothness to 0.000 before you start putting in keyframes!
grh wrote on 8/5/2006, 11:08 AM
My point is that (1) there _is_ a maximum and minimum that should be kept in mind, and (2) +/- 4 rotations total seems somewhat arbitrary, with respect to integer vs. fixed point vs. floating point data formats or data types (32-bit integer vs single precision vs. double precision). There's no obvious reason, technically, to limit the rotation to 1440 degrees in either direction. IMHO. But yes, clearly, keyframes get around the issue.