Unity 2D: How to add List of Collider2D inside of an if statement condition?-CodePudding

I have a list of Collider2D filled with a bunch of Collider2D's and I want to check to see if the player collides with any of the colliders added from the Unity editor in this list. Something like this snippet here:

using UnityEngine;
public class PlayerScript : MonoBehaviour
{
    private Rigidbody PlayerRB;
    public List<Collider2D> GroundCOlliders;
    public bool IsGrounded;
    
    private void Start()
    {
        PlayerRB = GetComponent<Rigidbody2D>();
        GroundColliders = new List<Collider2D>();
    }
    private void Update()
    {
        if (PlayerRB.IsTouching(GroundColliders))
        {
            IsGrounded = true;
        }
    }
}

CodePudding user response：

The typical solution is to cast a very short ray from the player's feet downwards and seeing if it hits one of the ground colliders. Consider adding a Ground tag or even layer to check against instead of holding a list of ground colliders. Something like:

// Note the use of FixedUpdate over regular Update for physics-related calculations.
private void FixedUpdate()
{
    RaycastHit hit;
    if (Physics.Raycast(playerFeetPosition, Vector3.down, out hit, 0.25f) && hit.collider.CompareTag("Ground"))
    {
        IsGrounded = true;
    }
    else
    {
        IsGrounded = false;
    }
}

EDIT: I realize that my solution doesn't directly answer your question, but rather assumes that I know what you really want and how to do it better. For a more direct solution to your problem, look into the Physics.OverlapX family of functions.

CodePudding user response：

if you are checking ground you use checkbox, and for the colliders you can use layerMask

Vector3 playerFeetPosition;
Vector3 playerBaseSize;
layermask groundmask;

private void FixedUpdate()
{
    RaycastHit hit;
    if ( Physics.CheckBox(playerFeetPosition, playerBaseSize,Quaternion.identity, groundmask)
    {
        IsGrounded = true;
    }
    else
    {
        IsGrounded = false;
    }
}