How to check if a 2D player collider is touching the ground/platform?

Questions & Answers
1

I’m trying to check if a player is touching the ground in order to turn on or off the jump script in a 2D platform game. I tried a few things but all of them seem to be failing. This is my recent attempt:

public Collider2D playerjumpcollider;
public Collider2D groundCollider;

void Start()
{
    playerjumpcollider = GameObject.FindGameObjectWithTag("Player").GetComponent<Collider2D>();
    groundCollider = GameObject.FindGameObjectWithTag("Ground").GetComponent<Collider2D>();
}

void Jump()
{
if (Input.GetButtonDown(“Jump”))
{
if (playerjumpcollider.IsTouching(groundCollider))
{
player.AddForce(new Vector2(0f, jumpForce), ForceMode2D.Impulse);
}
}
}

2

You can simply create a script that you attach to your player for example “PlayerCollision” :

public bool isGrounded = false;
void OnCollisionEnter2D(Collision2D col)
{
    if(col.gameObject.tag == "Ground"){
        isGrounded = true;
    }
}

void OnCollisionExit2D(Collision2D col)
{
    if(col.gameObject.tag == "Ground"){
        isGrounded = false;
    }
}

Then you would simply call the variable isGrounded using GetComponent().isGrounded;