How to check for collisions

Question

I feel like this should be really simple but I'm struggling to find out how to do it;

I have a player (KinematicBody2D with a collision shape 2D) and an enemy (with the exact same child nodes), and in the player script I want to check whether the two collide so I can damage the player. What is the easiest way to do this?

Answer 1

I think the piece of the puzzle you might be reaching for is that moveandcollide actually returns a KinematicCollision2D object which contains the object it collided with

for example:

  var kb2d = self.move_and_collide(velocity*delta)
  if (kb2d):
        print("collided with" + str(kb2d.collider_id))

for more detail check out the page at http://docs.godotengine.org/en/3.0/classes/class_kinematiccollision2d.html#class-kinematiccollision2d

Comments

There is also a section in "Tutorials" all about using kinematic bodies:
http://docs.godotengine.org/en/latest/tutorials/physics/using_kinematic_body_2d.html

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For whatever reason changing my moveandslide to moveandcollide is really not working for me. Is there any way to check collisions while still using moveandslide?

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You can use either. move_and_collide() returns a KinematicCollision2D. If you're using move_and_slide() you need to use get_slide_count() and get_slide_collision(), which also returns a KinematicCollision2D.

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Okay I'm using that but it's only returning my player colliding with the ground and not when it collides with the enemy.

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Nevermind, working now. But how do I check what object it is the KinematicCollision2D is related to? At the moment it's just returning a number.

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Nevermind again hahaha. Got it all working. Cheers for the help