Question Confused about BoxCasting distance

Hello,

I am trying to make a box-cast that would be quite thin and just stick out a little from my box collider, something looking like this:


Here's my code:

Code (CSharp):

1. Vector3 center = _bodyCollider.bounds.center;
2.     Vector2 size = new Vector2(0.05f, 0.63f);
3.          
4.     float distance =
5.         (_bodyCollider.bounds.size.x / 2)
6.         - (size.x / 2)
7.         + Physics2D.defaultContactOffset + 0.1f;
8.  
9.     var hit = Physics2D.BoxCast(
10.         center,
11.         size,
12.         0,
13.         Vector2.right,
14.         distance,
15.         LayerMask.GetMask("Sols"));

But the cast catches collisions way too far altough my calculation seems pretty alright to me, or at least with only a minor difference. I think i'm missing something about this distance. I tried a code found somewhere to visualize boxcasts but it didn't give accurate results.

 

Are you maybe confusing BoxCast and BoxCollider/ BoxCollider2D?

A BoxCast is like a RayCast but with an actually hitbox, as in, it does not only hit if the ray line goes through something but rather it hits if the projected box-ray hits something
There are also a few more differences between BoxCast and RayCast but essentially, both look ahead to see if somewhere between the starting position and the max distance they have to go through another object

if you just want to listen to colliders within your green rectangle from the first image, you want a BoxCollider2D not a BoxCast

 

Yes, you were right indeed, thank you very much!