player can stick to wall

Questions & Answers
1

If the player jumps into a wall and keeps holding the d or a key(depending what side of the game the wall is on) they will just stick to the wall.

Is there any code that could prevent this?

my code for the player:

using UnityEngine;
using System.Collections;

public class PlayerController : MonoBehaviour 
{
	public float speed;
	public float jumpSpeed;

	bool grounded = false;
	public Transform groundcheck;
	float groundRadius = 0.2f;
	public LayerMask whatIsGround;

	void FixedUpdate()
	{
		grounded = Physics2D.OverlapCircle (groundcheck.position, groundRadius, whatIsGround);

		if(Input.GetKey(KeyCode.D))
		{
			rigidbody2D.velocity = new Vector2 (speed, rigidbody2D.velocity.y);
		}
		else if(Input.GetKey(KeyCode.A))
		{
			rigidbody2D.velocity = new Vector2 (speed*-1, rigidbody2D.velocity.y);
		}
		else
		{
			rigidbody2D.velocity = new Vector2 (0, rigidbody2D.velocity.y);
		}
	}

	void Update()
	{
		if(grounded && Input.GetKeyDown(KeyCode.W))
		{
			rigidbody2D.AddForce (new Vector2 (0, jumpSpeed));
		}
	}
}

Thanks in advance.

3

I had the same problem, but in a 3D platformer.

Try reading up on Physics Materials. What was happening in my case was that the velocity vector I was applying to my character kept pushing him into the wall, and the friction between the wall collider and my character collider made him “stick”.

What I ended up doing is creating custom physics materials for my wall colliders and my character collider, which solved the problem (essentially I turned friction to be super low for those surfaces). Once you create a new physics material, you can add it on the actual collider component on your GameObject.

Hope that helps!

2

I think you could prevent this with using rigidBody2D.AddForce().

Alternatively, because I know why you dont’t want to use AddForce :P, you can just check, like you check if you are grounded, if you touch a wall. If so don’t apply any velocity.