Arrow Trajectory

Unity Engine
1

Help Board. I have an object arrow, which consists of 3 parts (rigidbody):
tip, shaft, tail. Movement arrow I give impulse, AddForce to the tip as he had mass, while the tail is resistance ,Drag.

What is the question: how can you make (one):
1 - Pre-flight trajectory
2 - Pre-hit area of the boom.

Since the arrow composite is the resistance Drag I do not know how to calculate the trajectory in physical formulas.

Thanks in advance.

2

Are you just using Unity’s rigid body drag? Also are you taking into account that drag scales with velocity?

3

Yes i use Unity rigid body drag.

4

Well then I believe in your trajectory calculation you could just subtract a constant value from your velocity vector to account for the drag.

5

Yes, exactly. I Get It. How to calculate the trajectory or area