Modifying AllanR's Angry Birds arc trail project to follow non-physics based gravity.

The title is a bit odd so let me try to explain. In Angry Birds Space when the player is about to shoot a bird a small arc trajectory is shown to them. It's affected by the gravity fields in the game, along with steam and water.

AllanR has made a really good trajectory arc example, and I'm trying to see if I can make it be affected by things other than the physics gravity itself.

GIFs to properly illustrate what I mean:

My previous attempt didn't exactly work out, as it made the trail glitch out, so if there is a solution to this, I'd like to hear it.

Link to AllanR's capx (works in C3): rieperts.com/games/forum/angry_birds.capx

Based on the example you´d have to check each dot if it overlaps one of the non-gravity zones and adjust accordingly. I have no idea if this can be done in an accurate manner. If it can be done it will be tricky.

You could pre-fire an invisible bird and track the trajectory but that takes time waiting for the ivisible bird to move (and timescale + physics doesn´t work) so probably not a good option either.