I've been experimenting with keyframe animation syncing flames to music and I had a few ideas for features.

- Interpolate to singularity/from singularity. If I had a number of flames in a file, it'd be useful to force a singularity in the middle of an animation. The singularities that occur during sheep animations are awesome, so it'd be cool to force a similar animation by either calling for it somehow or putting a element with a time and a type="singularity" and have the animation continue to interpolate (if possible) to the next non-singularity frame. I'm not sure how planned some effects in the interpolation are, but other types could be useful as well.

- Different rotation types. http://homepage.mac.com/rflicker/files/lua/sequenc3.lua (this is not mine, see http://www.twelfthnight.se/ff3/home.php) There are 3 different types of rotations in that script: one that is flam3's version, one where the triangle pivots around the origin, and one where the triangle rotates around its center of gravity.

Nutation is also demonstrated, where x, y, and o are modulated around their stated origin (i.e. no frame would be exactly as in the xml as those coefs define the center point for the nutation) at varying speeds.

- Varying the rotation per triangle. If we can use different rotation types, what about adding them to the xform rather than the flame as a whole? 1 could indicate 1 full rotation over nframes where 2 is 2 rotations and -1 is a counter-clockwise rotation. You could slide the rotation types into the xforms as well.

- If two keyframes are the same, make a loop with nframes=the number of frames between the two.

Thanks for reading :-)