You could try adding the loopOut() expression to your keyframed property like so...

loopOut("continue", numKeyframes=0);

This will maintain the speed between the two keyframes as a constant speed until the layer ends.

David Torno
Visual Effects Artist & Supervisor
http://www.ghosttownmedia.com
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On May 22, 2012, at 6:22 PM, jarret langmeire <langmeire@gmail.com> wrote:

> Hi everyone,
>
> I've been trying to figure this out and have given up. I'm using a light as an emitter to send out pulses to various locations within a 3d space. I would like these pulses to travel at the same speed but can't figure out a way of doing this when I keyframe the light to a different location - in keyframe world the number of frames between the starting and ending position would obviously need to be further apart the longer the distance travelled in order to match the speed to a set of keyframes where the start and end point are closer together. I imagine there must be an expression that can handle this but alas, expressions are not my forté.
>
> Any help would be greatly appreciated,
>
> Jarret
>

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