pls help I need a class that calculates the impact point of an arrow before it is fired

[Emran2]

For a mod, I need to know before throwing an arrow or spear where the arrow will land according to the game's calculations?
This method exists in the game, but I couldn't use it no matter what I tried.

If anyone has the knowledge, please write the code for me or guide me.

I want to implement this condition in the game:

If the arrow hits the collision player, it will hit the collision player.

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Edited March 13 by Emran2