Help with moving player using rb.velocity

Hello everyone, I am having a bit of an issue trying to swap from using transform.Translate to rigidbody.velocity for player movement.

It seems that my player moves okayish, a little juttery at times, but it also no longer seems to hit the ground?

I have a isGrounded bool, set off a few meters above the correct ground.

Note that groundCheckObject is an empty gameobject placed at the players.

Code (CSharp):

1.  
2. private void Move()
3.     {
4.         // Grounded
5.         isGrounded = Physics.CheckSphere(groundCheckObject.position, groundCheckDistance, groundMask);
6.  
7.         if (isGrounded && velocity.y < 0)
8.         {
9.             velocity.y = -2f;
10.             // Sticks us to the ground
11.         }
12.  
13.  
14.  
15.         Vector3 inputDir = transform.right * moveDirection.x + transform.forward * moveDirection.y;
16.         inputDir = inputDir.normalized;
17.      
18.  
19.         // Not moving if we not grounded
20.         if (isGrounded)
21.         {
22.             // Sprint
23.             if (canSprint && wantToSprint)
24.             {
25.                 speedMultiplier = sprintMultiplier;
26.                 canDodge = false;
27.             }
28.             else
29.             {
30.                 speedMultiplier = initSpeedMult;
31.                 canDodge = true;
32.             }
33.  
34.             // Dodge
35.             if (canDodge && wantToDodge && moveDirection != Vector2.zero)
36.             {
37.                 speedMultiplier = dodgeMultiplier;
38.                 canSprint = false;
39.                 gameObject.GetComponent<PlayerAttack>().canAttack = false;
40.  
41.                 StartCoroutine(Dodge());
42.             }
43.             else
44.             {
45.                 speedMultiplier = initSpeedMult;
46.                 canSprint = true;
47.                 gameObject.GetComponent<PlayerAttack>().canAttack = true;
48.             }
49.  
50.             moveAmount = inputDir * moveSpeed * speedMultiplier;
51.         }
52.  
53.         moveAmount.y += gravity * Time.fixedDeltaTime;// *Time.fixedDeltaTime
54.         Debug.Log(moveAmount);
55.      
56.         gameObject.GetComponent<Rigidbody>().velocity = moveAmount;
57.  
58.         //velocity.y += gravity * Time.deltaTime;
59.     }
60.  

I also tried checking this using collisions:

Code (CSharp):

1.  
2. public void OnCollisionStay(Collision collision)
3.     {
4.  
5.         Debug.Log(collision.gameObject.tag);
6.     }

This outputs that the collider is hitting the ground, although it shouldn't be.

For reference I attached a photo of the capsule collider seemingly floating.

I was wondering if you guys could help me out with this? Also wondering if there are any immediate improvements you guys can see within my velocity code, since this is my first time putting together the information.

Thank you!

 

Here is the players rigidbody component and capsule collider if that is of any use

 

Figured it out, the mesh Collider on my ground plane was on convex and was messing with the collision height.

Does anyone know what convex is useful for?

 

If you want to attach a Rigidbody and have physics apply to something, the collider has to be a primitive (box, capsule, sphere) or Convex. So for example, if you want a chair to get knocked over, you could use a Box collider for best performance, but it would look better if the shape was more accurate.. which is why you might use Convex. However, do note that the more complex the mesh the worse it will be for performance, and it can't be more than [I think] like 255 vertices, but if you make it convex anyway it will skip any more than that when processing the mesh, but it won't crash (at least in my experience).