Question boxcast not working?

i'm trying to add collision to my character in 3D, and for some reason my boxcast is not returning true even though I have the ground layer set to "ground", and whatisGround is set to the proper ground layer mask.

Here's my script

Code (CSharp):

1. public class PlayerMovement : MonoBehaviour {
2.  
3.     public Collider m_Collider;
4.     public RaycastHit m_Hit;
5.  
6.     public void Awake ( ) {
7.         m_Collider = GetComponent <Collider> ( );
8.     }
9.  
10.     public bool IsGrounded ( ) {
11.  
12.         // Fetch the center of the Collider volume
13.         m_Center = m_Collider.bounds.center;
14.  
15.         // Fetch the size of the Collider volume
16.         m_Size = m_Collider.bounds.size;
17.  
18.         m_SizeY = ( ( m_Size.y / 2.0f ) + 0.01f );
19.  
20.         m_Min = m_Collider.bounds.min;
21.         m_Max = m_Collider.bounds.max;
22.  
23.         var colliderExtentsY = m_Collider.bounds.extents.y;
24.         var rayPosition = ( m_Center );
25.         var rayDirection = ( -transform.up * m_SizeY );
26.  
27.         isGrounded = Physics.BoxCast (
28.             rayPosition, m_Size,
29.             rayDirection, out m_Hit,
30.             transform.rotation, m_MaxDistance,
31.             whatIsGround
32.         );
33.  
34.         return isGrounded;
35.  
36.     }
37.  
38.     public void Update ( ) {
39.  
40.         Debug.Log (
41.             $"IsGrounded ( ) : { IsGrounded ( ) }"
42.         );
43.  
44.     }
45.  
46. }

Any help is absolutely appreciated!

 

You probably want to use OverlapBox, not BoxCast. If BoxCast (or any of the casts) are already overlapping a collider it won't count as 'hitting' it.

 

It's not overlapping any collider. it's overlapping a layer mask ( ground ).

 

I don't see any problem with using Boxcast. I will try Overlap, but right now I just want to know how to properly use Boxcast in my example.

 

I'm teaching myself casting collision methods though. So I would like to know how to fix what I already have.

 

You've been told plenty. If your box cast starts already overlapping with the ground, it won't detect a hit with the ground.

It goes without saying that the ground needs to have a collider on it too.