standing up after crouching?

I have a crouching script that just changes the player's hight. It's really simple. My one problem is, when I try standing up while underneath an object, you phase right through it and cant move. How can I make my game so that if your head will touch, you wont be able to stand back up? Here's my script...

Code (JavaScript):

1. var LeftTexture :GameObject;
2. var RightTexture :GameObject;
3. var player : CharacterController;
4. var hitBox : CapsuleCollider;
5. var standHeight : float = 2.5;
6. var crouchHeight : float = 1.5;
7. var smooth : float = 0;
8. var crouchTimer : Light;
9. var soundSpeed : float = 0;
10. var cam : GameObject;
11. var standCamera : float = 0;
12. var crouchCamera : float = -1.5;
13. var footsteps : AudioSource;
14. function Update () {
15.     if (Input.GetButtonDown ("Crouch"))
16.         if( LeftTexture.activeSelf){
17.             RightTexture.SetActive (true);
18.             LeftTexture.SetActive (false);
19.         }
20.         else if (RightTexture.activeSelf){
21.             LeftTexture.SetActive (true);
22.             RightTexture.SetActive (false);
23.         }
24.     if (LeftTexture.activeSelf)
25.     {
26.         player.height = crouchHeight;
27.         hitBox.height = crouchHeight;
28.     }
29.     if (RightTexture.activeSelf)
30.     {
31.         player.height = player.height = Mathf.Lerp(player.height,standHeight,Time.deltaTime*smooth);
32.         hitBox.height = hitBox.height = Mathf.Lerp(hitBox.height,standHeight,Time.deltaTime*smooth);
33.     }
34.  
35.     if (crouchTimer.GetComponent.<Light>().intensity > 0)
36.     {
37.         footsteps.enabled = false;
38.     }
39.  
40.     if (crouchTimer.GetComponent.<Light>().intensity == 0)
41.     {
42.         footsteps.enabled = true;
43.     }
44.        
45.     if (Input.GetButtonDown ("Crouch"))
46.     {
47.         crouchTimer.GetComponent.<Light>().intensity = 1;
48.     }
49.        
50.    
51.     crouchTimer.GetComponent.<Light>().intensity -= 0.1 * Time.deltaTime / soundSpeed;
52. }

 

Before you change the height of your capsules, you should check first by using Physics.CheckCapsule.
https://docs.unity3d.com/ScriptReference/Physics.CheckCapsule.html

If the capsule check clears and there is enough room you go ahead with changing the height. If the capsule check fails and something is in the way, then don't change the height.

 

I looked at the page. How can I make my code have those be checked. Like...

Code (CSharp):

1. if(blankety blankety blank)
2. {
3. crouchOn.SetActive(true);
4. }

What you I put behind the if statement?