Tag and Collider errors (c#)

Questions & Answers
1

I’m trying to limit jumping in this script to only jumping from objects with the “ground” tag but unity comes up with this error.

Assets/PlayeController.cs(19,39): error CS0120: An object reference is required to access non-static member `UnityEngine.Collision.collider'

here is my script

using UnityEngine;
using System.Collections;

public class PlayeController : MonoBehaviour {
		
		public float speed;
		public float jumpHeight;

		private Rigidbody rb;
		private bool isGrounded;

		void Start ()
		{
			rb = GetComponent<Rigidbody>();
		}

		void OnCollisionStay (Collision collisionInfo)
		{
			if (Collision.other.CompareTag("ground")) 
				{
				isGrounded = true;
				}
		}
	
		void OnCollisionExit (Collision collisionInfo)
		{
		isGrounded = false;
		}
		
		void FixedUpdate ()
		{
			float moveHorizontal = Input.GetAxis ("Horizontal");
			
			Vector3 movement = new Vector3 (moveHorizontal, 0.0f, 0.0f);
			
			rb.AddForce (movement * speed);
			
			bool jumpy = Input.GetKeyDown ("up");

			if (jumpy && isGrounded) 
			{
				Vector3 jumping = new Vector3 (0.0f, jumpHeight, 0.0f);
			
				rb.AddForce (jumping * speed);
			}
		}
	}

the problem is with the if(collision.other.compareTag(“ground”)) line but I’m not sure what unity wants me to do here.

2

It looks like you are trying to access a static collider property, when you should be using your referenced argument. I believe it should be:

collisionInfo.other.CompareTag("ground"))

If that does not work, maybe you are missing a component?

3

void OnCollisionStay (Collision collisionInfo)
{
if (collisionInfo.CompareTag(“ground”))
{
isGrounded = true;
}
}

Just trying to reference the Collision class instead of the collisionInfo object