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Holding y axis whilst bezier curving x and z axis’
Hi guys,
This might be just me missing something really simple, but is it possible to hold the y axis (say at 540) whilst still manipulating the x and z axis’. I know you can separate the position properties in the animation dropdown, but you loose the ability to use the bezier handles.
The problem I have is that when I use the bezier handles to make a smooth animation I find the y axis bobs up and down annoyingly on either side of my keyframe. Not normally a problem, but I’m animating a null along a path (as the camera point of interest), and if it moves on the Y it wrecks the look. The only way I can get the bezier handles to not do Y bend this is to use the ‘top’ view and work the handles from there… (the same way I use to get rid of the boomerang effect)
Would an expression help me out here do you think? Forcing the Y to a set figure?
Although I’ve been using After Effects for 8 years or so, I’m self taught and I always have the sneaky suspicion I’ve missed something from the basic’s book! Sorry if I have.
Thanks guys,
SamCS6
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3 Replies
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[Sam Freeman] “Would an expression help me out here do you think? Forcing the Y to a set figure?”
Nice approach. Alt-click the position stopwatch and enter the following expression:
[transform.position[0],transform.position.key(1)[1],transform.position[2]]This expression works with your keyframes, always use the current values for X and Z, and it will always the value for Y from the first keyframe on the layer.
Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog – What I’m thinking when my workstation’s thinking
Creative Cow Forum Host: Live & Stage Events -
Thanks Walter – as always, you’re the man!
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You’re welcome, Sam.
I should mention that this expression will not affect the motion path itself — that’s driven by the key frames — so the motion path will show Y axis movement that will not occur in preview or render. Working with this expression may be a little confusing unless you keep that in mind.
Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog – What I’m thinking when my workstation’s thinking
Creative Cow Forum Host: Live & Stage Events
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