How can you prevent a RigidBody2d from moving on x axis?

Question

I'm making a 2d platformer and I wanted to add a physics based button, but I got stuck when I couldn't make the moving part go only up and down.

Comments

Can you show us your script?

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I don't really have a script yet. I wanted to start with this moving part, because my plan was to check the local coordinates of it and based on that information make it activate other things like doors.

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Well but you probably have a moving script already where you faced that problem right?

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I don't. I wanted to use the rigidbody2ds physics to move it up and down. I set the gravity_scale to negative and made an invisible stopper above it. I then realised that I need it to not move sideways.

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Okay, I made it, but it surely is not perfect. From the players perspective it could be weird that a button bounces them back a bit (or bounces other rigidbody2d) + in an edge case if you collide with it at enough high velocity it will go flying to the side. Also I would really like to not unnecessarily overwork the engine.

extends RigidBody2D
onready var start = position

func _integrate_forces(state):
    if position != start:
        state.set_linear_velocity(Vector2((start.x - position.x) * 400, state.get_linear_velocity().y))

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You can fix that issue by creating a different layer for the physics based button that isn't masked by the other rigidbodies(the button cant mask them either)

Answer 1

If there aren't any movement already, i'd call (my movement variable here).x = 0 not sure if this helps or not.

Comments

Unfortunately it just slows it down for some reason. I think one frame it moves and the other it stops and that cycle repeats. Thank you for help anyways