IsGrounded skipping frames. Only returns true every second or third frame.

I've spent quite some time wondering why I couldn't get IsGrounded to work.
So I tried using Raycast instead but still getting the same results.
If anyone out there has some wisdom please do share.

Thaks in advance.... and here's my code

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class KnightController : MonoBehaviour
6. {
7.  
8.     public float speed = 4f;
9.     public float rotSpeed = 80f;
10.     public float rot = 0f;
11.     public float gravity = 8f;
12.  
13.     Vector3 moveDir = Vector3.zero;
14.  
15.     CharacterController controller;
16.     Animator anim;
17.  
18.     private Collider coll;
19.  
20.     void Start()
21.     {
22.         coll = GetComponent<Collider>();
23.         controller = GetComponent<CharacterController> ();
24.         anim = GetComponent<Animator> ();
25.     }
26.  
27.     // Update is called once per frame
28.     void Update()
29.     {
30.      
31.         if(Grounded())
32.         {
33.             Debug.Log("Is_Grounded");
34.             if(Input.GetKey("up"))
35.             {
36.                 Debug.Log("arrow_key_pressed");
37.                 moveDir = new Vector3(0, 0, 1);
38.                 moveDir *= speed;
39.             }
40.             if(Input.GetKeyUp("up"))
41.             {
42.                 Debug.Log("WORKING");
43.                 moveDir = new Vector3(0, 0, 0);
44.             }  
45.         }
46.  
47.  
48.         //moveDir.y -= gravity * Time.deltaTime;
49.         controller.Move(moveDir * Time.deltaTime);
50.  
51.         bool Grounded()
52.         {
53.             return Physics.Raycast(transform.position, Vector3.down, coll.bounds.extents.y + 0.3f);
54.         }
55.  
56.     }
57. }

 

You must use Physics.Raycast() in FixedUpdate() and store the result in a variable for later use in your Update() or other function.