I'm trying to make a clone of Super Crate Box (simple 2D platformer with shooting mechanics; just to learn Godot). I'm not sure how to implement the knockback effect when enemy gets hit by a bullet.
In order to check for collisions I use Area2D. The bullets checks for collision with the script like so:
func _on_Area2D_body_enter( body ):
if body.get_meta("type") == "enemy":
body.get_hit(5, (get_global_pos() - body.get_global_pos()).normalized() * 100)
On the enemy the
get_hit() function looks as follows:
func get_hit(dmg, force):
# print("Got hit with dmg: " + str(dmg) + "and force of: " + str(force))
health -= dmg
In this code the idea was to compute the difference in positions between the bullet and the enemy at the moment the bullet hits. I could then use this vector (or just it's horizontal part) to move the enemy back a bit. Unfortunately the computed vector is unreliable. Sometimes its horizontal (x) part is has opposite sign than expected.
To be honest I'm not sure I should be using Area2D and checking for its entering and leaving. The enemy and the bullet are KinematicBody2D. I don't need any elaborate physics in this game. Simple knockback seems like a job for a force impulse but that would require RigidBody2D... am I right?
How should I go about it? Should I stick to Area2D for collision checking?
Also I'm new so I hope I made this question as concise and as clear as possible and I did everything according to the rules. If not please let me know.