Shameless plug: A friend of mine and I made a game[1] for a jam that works the other way around. The goal is to manually fiddle with the coefficients to recreate a given shape.
It gives an easy way to play with the coefficients and hopefully allows the player to gain some intuitions. For example how some combinations of frequencies lead to rotational symmetry and why negative frequencies are necessary.
It's not very polished, though. I made a mistake while writing the algorithm that checks whether the shape is matching. It causes some false negatives in certain situations. There might also be some issues with dragging the controls on Mac OS.
It gives an easy way to play with the coefficients and hopefully allows the player to gain some intuitions. For example how some combinations of frequencies lead to rotational symmetry and why negative frequencies are necessary.
It's not very polished, though. I made a mistake while writing the algorithm that checks whether the shape is matching. It causes some false negatives in certain situations. There might also be some issues with dragging the controls on Mac OS.
[1] https://coldiv.itch.io/fouriershaper