cast a ray to hit an object in the center of the screen

Question

Okay, I need to set up a ray so that when it is cast from the camera it will hit/destroy what is currently in the center of the screen, and nothing else along the way. Currently, I can cast a ray from the camera, and it will destroy what it hits, but it doesn't hit what's at the center of the screen, and instead hits a bunch of other stuff. My code goes as follows:

 var speed : float = 6.0;
 var jumpSpeed : float = 8.0;
 var gravity : float = 20.0;
 var rotSpeed : float = 5.0;
 var latTarget : Transform;
 var latRotSpeed : float = 5.0;
 public var reach : float = 10;
 var currentTarget :Transform;
 var cameraPos : Transform;
 var target : Transform;
 
 
 
     private var moveDirection : Vector3 = Vector3.zero;
 
     function Start() {
 
     }
 
     function Update() {
 
         var hit : RaycastHit;
 
         var fwd : Vector3 = cameraPos.TransformDirection(Vector3.forward);
 
         var ray : Ray = Camera.main.ViewportPointToRay (Vector3(0.5,0.5,0));
 
         var controller : CharacterController = GetComponent.<CharacterController>();
         if (controller.isGrounded) {
             // We are grounded, so recalculate
             // move direction directly from axes
 
             moveDirection = Vector3(Input.GetAxis("Horizontal"), 0,Input.GetAxis("Vertical"));
             moveDirection = transform.TransformDirection(moveDirection);
             moveDirection *= speed;
 
             if (Input.GetButton ("Jump")) {
                 moveDirection.y = jumpSpeed;
             }
         }
         transform.RotateAround(target.position, Vector3.up, Input.GetAxis("Mouse X")*rotSpeed);
         transform.RotateAround(latTarget.position, Vector3.left, Input.GetAxis("Mouse Y")*(latRotSpeed));
         //if (transform.eulerAngles.
 
 
         transform.eulerAngles.z = 0;
         // Apply gravity
         moveDirection.y -= gravity * Time.deltaTime;
 
 
 
         // Move the controller
         controller.Move(moveDirection * Time.deltaTime);
         if (Physics.Raycast(ray, hit, reach))
         {
             if(Input.GetMouseButton(1)){
                 Destroy(hit.transform.gameObject);
                 Debug.Log("I'm hitting something");
             }
         }
     }

Thank you for your help, in advance.

Answer 1

From what I understood is you are trying to create first person game where you shoot with the center of your screen

You should rewrite your - var ray : Ray = Camera.main.ViewportPointToRay (Vector3(0.5,0.5,0));

To this: var ray : Ray = Camera.main.ViewportToWorldPoint (new Vector3(0.5f, 0.5f, 0.0f));

Here is how you can implement it fully.

if (//Here you can put the key/button the player needs to press in order to fire or some other checks for ammo ,etc.. ) {

         // Create a vector at the center of our camera's viewport
         Vector3 rayOrigin = fpsCam.ViewportToWorldPoint (new Vector3(0.5f, 0.5f, 0.0f));

         // Declare a raycast hit to store information about what our raycast has hit
         RaycastHit hit;

         // Check if our raycast has hit anything
         if (Physics.Raycast (rayOrigin, fpsCam.transform.forward, out hit, weaponRange))
         {
             // Rest of your code - what to do when raycast hits anything

         }
     }
 }`

cast a ray to hit an object in the center of the screen

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