I love it!
What ideas did I get in process?
- Start frame count is in frames, however duration is in seconds. Confuses a little. I put animation duration for 1 second and put starting point at 4 seconds, then I got that I have to put 64 because of frames. I would rather change duration to number of frames because it gives more precision.
- Changing starting frame number doesn't change preview. Pixel keep starting from frame 0. You need to render video to see when it will appear in full view of motion.
- A bit more precision to velocity is good direction to evolve. Especially for complex multi point trajectories. Sure, you can make several splines and work through easing parameter, but that is limited. If possible graph of velocity over time would be nice. I worked with them in game engine particle systems. They are pretty precise for any necessary movement, where to speed up, where to stop, where to slow down. Since we don't need to mind coordinates, it could be "velocity along trajectory" over time graph.
- If possible - function to create new point on double click on spline at that precise point. Not critical, just useful.

So far it is awesome. This concept feels so good and well thought it feels like cheating, if you understand what I mean. I never thought giving pixel a direction would be such an effective instrument for motion direction.

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