Issue with checking to see whether the Bounds value's of two game objects equal each other

Questions & Answers
1

Hi there,

So basically I have two game objects in a scene - one is just a rectangle shaped game object and the other is a wall. Both game object have BoxCollider2D components attached to them. The rectangle has a Dynamic Rigidbody2D attached to it.

Basically I have code that makes the rectangle travel horizontally to the right towards the wall. I have an if statement that states when the X value of the Bounds.Max position of the rectangle touches the X value of the Bounds.Min position of the wall a message should pop up in the console.

Here is the code that I have:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class PlayerNew : MonoBehaviour
{
    private Rigidbody2D _rb;
    private BoxCollider2D _col2D;
    private float X_force = 25f;
    public Vector2 newPosition;
    public Vector2 bottomRight;
   
    public Vector2 wallBoundsMin;
   
 
    // Start is called before the first frame update
    void Start()
    {
     
      _rb = GetComponent<Rigidbody2D>();  
      _col2D  = GetComponent<BoxCollider2D>();
      wallBoundsMin = GameObject.Find("Wall").GetComponent<BoxCollider2D>().bounds.min;
 
    }
 
    // Update is called once per frame
    void Update()
    {
       
        bottomRight = new Vector2(_col2D.bounds.max.x,_col2D.bounds.min.x);
       
 
 
        newPosition = new Vector2(X_force,0);
       _rb.MovePosition(_rb.position + newPosition * Time.deltaTime);
 
 
      if(bottomRight.x == wallBoundsMin.x){
        Debug.Log("Bounds have collided with one another");
      }
     
       
    }
}

However nothing appears in the console when the rectangle crosses the wall. But the message actually does appear in the console if I change the if statement to the following:

if(bottomRight.x >= wallBoundsMin.x){

I’m confused as to why the message wont appear when I just check to see when the two X value’s equate to one another? I don’t think I’ve written the code incorrectly? Here is a video of the issue:

Any help would be appreciated. Thanks

2

Floats are an inaccurate number. Don’t compare floats with ==. For example. 0001 and .0002 are not equal to a computer. So basically when the comparison is called they are both not exactly the same value. I think there is a way to ignore a certain level of discrepancy but you are probably better off just calling > or >=

Another example is if you divide 10f by 3 you might get 3.333332, or 3.333334 ect