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