Join Angie Taylor for an in-depth discussion in this video Animating rotation, part of After Effects: Stereoscopic 3D Motion Graphics.
One way of making this look like 3D tracking is to add a little bit of animated rotation. And that's what we're going to do here. We're in stereo 3D O7 AEP which you can find in the project files folder. And we're inside O2B text track. And you'll see in here I've actually used 2D tracking just to track these objects onto this building. And what I'm going to do now is just give them a more 3D appearance. And we're going to just solo the CID outlines and the background movie.
And a really easy way of doing this is just to open up the rotation value by hitting R. And just making slight rotation adjustments to make it look as if it's the same perspective as the buildings. So you're basically looking at the uprights of the buildings and just checking that the uprights of the letters are kind of parallel to those. You probably want about 30 or 40 degrees as a kind of rough guide. Something like that will do. I've got about 34 degrees. Once you do the X rotation, then it's easy to do the Y rotation.
Now, you'll find if you try and do Y first, you get into all sorts of problems. So, what I'm going to do is I'm going to start with it at that angle as if it's along the edge of the building. And I'm going to set a keyframe for Y rotation, and also for X rotation. And Z rotation just in case I need to adjust them. I can always get rid of keyframes afterwards. And then we're going to go round. Now it takes a little bit of figuring out which direction it need to rotate in. We really need it to go in, and, if you just scrub to find out, we really need it to go in a positive direction.
As it rotates around so I'm going to scrub forwards. And try and figure out how much positive rotation it's going to need to get to there. And I'm going to scrub that round to about there where I reckon it's about right. And we'll just have a look at how that looks. So there we go it looks as if it's rotating now with the building. Now you can continue the rotation around, or there's a little expression that you can use to loop that, and to continue it. So I could go to my Expression menu, and if I go to Loop Out, I can change the word Cycle to Continue.
And we'll just remove the rest of that we don't need number of key frames. And you'll notice what happens now if I preview it. It will go through the animation that I've created and then when it gets to the end here, it will continue rotating at the same speed. So it should stay in line with the building. So now it really looks as if that is in the shot. Just by animating the rotation along with the position and scale just a little bit of manual key framing to do that. Now I'm going to continue working on that and the other layers just to perfect it a little bit.
And then we'll move on to the next step.
- Basic concepts of stereoscopic 3D
- Faking 3D tracking
- Adding effects, transparency, and styles
- Compositing stereo 3D footage
- Adjusting depth settings
- Applying finishing touches