Stop character from falling/sticking to walls

Questions & Answers
1

Hello,

I am trying to make my character hang on a wall but I am facing 2 problems.

First problem is how do I know where my character is hanging at? The bottom, left/right side.
I am not sure how to get started with this.

My first thought was to put 3 different colliders and give them a name depending on the side there are on. But not sure if this is a good idea performance wise.

Second problem I encounter is how do I stop the character from falling down?
I figured this would be the easy part but I am stuck with it as I can’t figure out how to make a rigid body stop falling.

I have no idea how to handle the not falling part. First I tried to set gravity to zero on the object but that doesn’t work.

The code so far I have although very trail and error:

public class MovementScript : MonoBehaviour
{

	public float maxSpeed = 5f;

	public bool startJump = false;
	public bool isJumping = false;
	public bool isFalling = false;

	public float jumpForce = 150f;

	//public LayerMask whatIsGround;

	public bool hangingOnWall = false;
	public bool jumpOffWall = false;
	public float jumpDirection;

	void Start ()
	{
	
	}

	void FixedUpdate()
	{
		float move = Input.GetAxis("Horizontal");

		rigidbody2D.velocity = new Vector2 (move * maxSpeed, rigidbody2D.velocity.y);

		if(Input.GetButton ("Jump") && (!isFalling && !isJumping ) )
		{
			startJump = true;
		}

		if(hangingOnWall && move != 0)
		{
			jumpOffWall = true;
			jumpDirection = move;
		}

	}

	void Update ()
	{
		if(startJump)
		{
			rigidbody2D.AddForce(new Vector2(0,jumpForce));
			startJump = false;
		}

		if (rigidbody2D.velocity.y > 0)
		{
			isJumping = true;
			isFalling = false;
		}
		else if(rigidbody2D.velocity.y < 0)
		{ 
			isJumping = false;
			isFalling = true;
		}
		else
		{
			isJumping = false;
			isFalling = false;
		}

		if(hangingOnWall)
		{
		}

		if(jumpOffWall)
		{
			rigidbody2D.AddForce(new Vector2(jumpDirection,jumpForce));
			jumpOffWall = false;
			hangingOnWall = false;
			jumpDirection = 0f;
		}
	}

	void OnCollisionEnter2D(Collision2D collision)
	{
		if (collision.collider.gameObject.layer == LayerMask.NameToLayer("Ground"))
		{
			Debug.Log("on the ground");
		}
		if (collision.collider.gameObject.layer == LayerMask.NameToLayer("Walls"))
		{
			if(rigidbody2D.velocity.x == 0)
			{
				Debug.Log (rigidbody2D.velocity);
				hangingOnWall = true;
			}
		}
	}
}

Thanks in advance!

2

Hey there!

1 - About the performance using the colliders:
I’m not an expert about that, but I’m pretty sure that 3 colliders is no big deal :slight_smile: So if you are worried about perfomance, do it!

2 - Handling the ‘not falling’ part:
Why setting the gravity to 0 did not work? It should’ve. Could you describe what happened? The player kept falling, didn’t fall nor jumped off the wall…
Probably there is a logic problem with the flags (isHanging, isFalling, etc.).