Making Z being able to go through terrain

First, not sure why it says "protected"lol. But anyway...

I got the Z key to let you high jump after pressing it, but how do I make it so he can go through terrain? For example, I have a layer called "ceiling", so you will be able to high jump through that. But I also need it to ignore the ground check or else pressing Z would cause him to fall through the floor hes on.

Code (CSharp):

1.  protected Rigidbody2D rBody;
2.  
3.     protected bool facingRight = true;
4.     protected float moveDir;
5.  
6.     public float spead;
7.     public float jumpForce; //how high the character jumps
8.     public float highJumpForce; //junps higher after pressing Z
9.  
10.     private float moveInput; //the key being pressed down
11.     private Rigidbody2D rb;
12.  
13.      private bool isGrounded;
14.     public Transform groundCheck;
15.     public float checkRadius;
16.     public LayerMask whatIsGround;
17.  
18.  
19.    void Start()
20.     {
21.         rb = GetComponent<Rigidbody2D>();
22.         //Set a starting velocity when our Game Starts (Set x to 1 for moving Right and -1 for moving Left)
23.         Vector3 DefaultVelocity = new Vector3(1 * spead, 0, 0);
24.         rb.velocity = DefaultVelocity;
25.         moveDir = spead;
26.  
27. }
28.  
29. //---------------------------------------------------------------------------------------------------------
30.  
31. void FixedUpdate()
32.     {
33.  
34.         //jump
35.         isGrounded = Physics2D.OverlapCircle(groundCheck.position, checkRadius, whatIsGround);
36.  
37.  
38.  
39.  
40.         //move left and right with left and right arrow keys
41.  
42.         moveInput = moveInput = Input.GetAxisRaw("Horizontal");  //moveInput = Input.GetAxis("Horizontal") caused him to brifely stop when hitting the arrow again.  So changed it to "GetAxisRaw" fixed it
43.  
44.  
45.  
46.         //True if there is no Input
47.         if (moveInput == 0f)
48.         {
49.  
50.             //We will try to use rb.velocity.x existing Velocity/Movement instead
51.  
52.             //True if our Object is already moving
53.             if (rb.velocity.x > 0f)    //True if Moving Right
54.                 moveInput = 1f;
55.             else if (rb.velocity.x < 0f)   //True if Moving Left
56.                 moveInput = -1f;
57.             //If both Statements failed, there is no Horizontal Movement
58.             //moveInput will continue to be at 0
59.         }
60.  
61.  
62.         //True if there is Input OR we managed to use the existing Velocity instead to fill the value of moveInput
63.         if (moveInput != 0f)
64.             //Continue as per normal
65.             rb.velocity = new Vector3(moveInput * spead, rb.velocity.y);
66.  
67.  
68.         if (facingRight == false && moveInput > 0)
69.         {
70.             Flip();
71.  
72.         }
73.  
74.  
75.         else if (facingRight == true && moveInput < 0)
76.         { //because he is moving left while facing right
77.             Flip();
78.         }
79.     }
80.     //------------------------------------------------------------------------
81.     public void Update()
82.     //press key to jump
83.  
84.     {
85.  
86.  
87.         float input = Input.GetAxis("Horizontal");
88.  
89.         if (input > 0 && moveDir < 0)
90.         {
91.             moveDir = spead;
92.             Flip();
93.         }
94.         else if (input < 0 && moveDir > 0)
95.         {
96.             moveDir = -spead;
97.             Flip();
98.         }
99.  
100.  
101.         //CODING THE SPACE BAR TO JUMP
102.  
103.         if (isGrounded && Input.GetKeyDown(KeyCode.Space))
104.         {
105.             rb.AddForce(Vector3.up * jumpForce);
106.             rb.velocity = Vector3.up * jumpForce;
107.             SoundManager.PlaySound("jump");
108.         }
109.  
110.         rb.velocity = new Vector2(moveDir, rb.velocity.y);
111.  
112.  
113.  
114.      //CODING THE Z KEY TO HIGH JUMP
115.         if(isGrounded && Input.GetKeyDown(KeyCode.Z))
116.     {
117.             rb.AddForce(Vector3.up * highJumpForce);
118.             rb.velocity = Vector3.up * highJumpForce;
119.         }
120.    }
121.  
122.  
123.  
124. void Flip() {
125.  
126.             facingRight = ! facingRight;
127.             Vector3 Scaler = transform.localScale;
128.             Scaler.x *= -1;
129.             transform.localScale = Scaler;
130.         }
131.  
132.  
133.     }
134.  
135.  

 

Maybe disable the character's collision box until it goes through the terrain?

 

I tried this, but it didnt work

Code (CSharp):

1.     public Transform BackgroundPrefab;
2.  
3.  
4.       if(isGrounded && Input.GetKeyDown(KeyCode.Z))
5.     {
6.             rb.AddForce(Vector3.up * highJumpForce);
7.             rb.velocity = Vector3.up * highJumpForce;
8.             Physics.IgnoreCollision(BackgroundPrefab.GetComponent<Collider>(), GetComponent<Collider>());
9.  
10.         }
11.    }
12.