Improve animate with callback function as argument

[simon-milleto]

Hello! I'm starting to have a look into Motion One and it looks fantastic! I have specific use case where I want to animate a Three.js object.
As I understood I can use the animate function with a callback function as argument and have the progress of my animation like this:

animate(
  (progress) => {
    console.log(progress);
  }
);

So it gives a value between 0 and 1 relative to the current progress of the animation. It's already great but I wanted to ask if some improvements are possible and also wanted.
For example:

• Allow spring interpolation (as I experienced, spring interpolations are not supported for progress callback)
• Start value and end value, for now it just interpolate value from 0 to 1, maybe it would be nice to have a start value and the end value wanted (e.g. for my use case I wanted to update my value from 5 to 100, I know I can compute this value thanks to the progress value but maybe it can be great to have this built-in)
• In addition of previous point, instead of the current progress, give the current value

Here is few ideas for the use case that I encountered, but I don't know if the goal of this library is to animate values like this