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Camera: Locking “point of interest” to “position”?
So I’ve got a project where a camera in 3d needs to be perfectly parallel to the layer it’s aiming directly at, as it moves about in the x and y axes. Apparently, in order to accomplish this, I must make sure the “point of interest” and “position” remain the same, in the x and y axes (while the z axis differs by some value, in accordance with the camera’s position relative to the layer it’s aimed at). Fine and good.
The trouble is that when I start messing around with the camera’s position in the timeline, these two values (point of interest, position) start going out of whack. Naturally this causes the ostensibly 2d layer to start rotating about in three dimensions. I can manually fix things keyframe by keyframe, but this is really no help when it comes to, say, fine adjustments made in the graph editor; adjustments made to the “point of interest” graph have no bearing on the “position” graph, and it’s frankly impossible to tweak both to be identical.
So I’m looking for a way to lock the two things together. This would have to be a lock which doesn’t touch the z axis, as it must needs differ. The method for this is no doubt a simple thing.
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4 Replies
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Never mind. Expressions, yeah yeah. Sorry. ;p
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Why not just turn point of interest auto-orientation off?
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Ahh, there we go. Yes, that did the trick. I figured it would be something built-in. Thanks.
Now I just need to figure out how to keep AE from decelerating and re-accelerating motion every time it comes to a keyframe. There has to be a way of forcing it to maintain smooth motion. Even Audition is more intuitive when it comes to these curves.
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Depending on the animation, you can right click on the keyframe and select “rove across time”. That action will even out the time on either side of the keyframe.
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8core MacPro, 3.0 GHZ, 10GB RAM, OSX 10.5.2
DualCore G5 2.0 GHZ, 2GB RAM, OSX 10.4.11AE7 on both for now.
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