interpolation curve smoothness

danielgesmith

Having some issues with the smoothness of curves when interpolating between keyframes in the editor. Specifically, when i create 2 scale keyframes with an extreme curve (eg. both control points in bottom right corner - I'm trying to move something toward the "camera"), instead of a smooth scaling of my object, i see what looks like a series of jumps in scaling. ie. as if the curve is being broken down into a series of linear segments. Now, coincidentally, that's exactly what the curve window shows (if you look closely!), but i don't know if thats a UI issue with drawing curved lines, and may be unrelated. It's fairly subtle, and probably more noticeable if you slow down playback speed.

I'm using my own runtime, which doesn't display these jumping issues,so can't confirm whether its just an editor thing.

Hope this makes sense. Let me know if I need to explain better!

ps. An example animation that should show this is an image that scales from very small to very large, using an exponential type curve (both control points in the bottom right corner).

Daniel

danielgesmith

Søren

The curve is actually being broken down into linear segments, this makes it much easier to use at runtime. Would the problem you're having be fixed if the the curve was subdivided more times ? Don't know it it's trivial but maybe the amount of subdivisions could be a global setting.

danielgesmith

Thanks for the reply. Yeah, i think the more subdivisons there were , the more accurate it would be. So if it was a modifiable setting (and available to change in the editor) i imagine it would fix my problem.
Alternatively, i don't know if it'd be possible to vary the number of subdivisions used for each keyframe based on some estimate of the curve, uh, curviness.