How to fire a bullet in direction to a reticle

I have a prefab object called FireballMainCharacter, which is a rigidbody sphere with this script attached:

Code (CSharp):

1.  
2.     public class FireballMainCharacter : MonoBehaviour {
3.          // Use this for initialization
4.          public float speed=10.0f;
5.          public int damage=1;
6.          // Update is called once per frame
7.          void Update () {
8.              // Move the object forward along its z axis speed*unit/second.
9.          //this.gameObject.transform.Translate(0, 0, speed * Time.deltaTime);
10.          this.gameObject.transform.Translate(0, 0, speed * Time.deltaTime);
11.          }
12.          //Called when another object collides with this trigger
13.          void OnTriggerEnter( Collider other){
14.            
15.              PlayerCharacterElyEnemy player= other.GetComponent<PlayerCharacterElyEnemy>();
16.            
17.              //Check if other object is PlayerCharacter
18.              if( player!= null) {
19.                      Debug.Log("ElyEnmy: llamo a hurt" + player.name);
20.                      player.Hurt(damage);
21.                      //player.transform.Rotate(-75, 0, 0);
22.                  }
23.          //    Debug.Log("Other hit" + other.name);
24.     //        player.transform.Rotate(-75, 0, 0);
25.              //IMPORTANT: We have to destroy the fireball, once it has been collided with other object....before check with objects
26.              Destroy(this.gameObject);
27.          } // End OnTriggerEnd
28.        
29.     }

Know i have the main character with a GunEnd ( the point from i want to fire). I want to fire to a crosshair or reticle which is in half screen ( 3d game). The start point is good, but i can get the fireball to go to the reticle, the objectPoint

1. 
   
   Code (CSharp):

   1.     void Update () {
   2.              //Add && cam.name=Shooting camera to only shoot from shoot camera... && System.String.Equals(_camera.name,"ShootCamera")
   3.              if( Input.GetMouseButtonDown(0) && _camera.enabled == true )
   4.              {
   5.            
   6.                  Vector3 startPoint = gunHolder.transform.position;
   7.                  Vector3 objectpoint = new Vector3( _camera.pixelWidth/2, _camera.pixelHeight/2, 0);
   8.                
   9.                  _fireball = Instantiate(fireballPrefab) as GameObject;
   10.                
   11.                  //Place the fireball in front of the enemy and point in the same direction
   12.                  Vector3 directionToShoot = objectpoint-startPoint;
   13.                  _fireball.transform.position = startPoint;
   14.                  _fireball.transform.rotation = transform.rotation;
   15.              }

I cant get directionToShoot work as expected, now ive get that the fireball begins in the gunEnd ( gunHolder) which its ok, but it goes straight ahead not in the direction to the reticle.

Any help would be apreciated. The script i get as public variable the character, and the gunEnd and is attached to the ShootCamera

 

Your calculation of objectpoint is the issue; right now, it will always give the same world-space point. Instead, you'll want to do a raycast to find an object to shoot at.

Code (csharp):

1. Vector3 startPoint = gunHolder.transform.position;
2. Vector3 objectpoint;
3. RaycaastHit hit;
4. if(Physics.Raycast(_camera.transform.position, _camera.transform.forward, out hit, 100))
5.    objectpoint = hit.point;
6. else
7.    objectpoint = _camera.transform.position + camera.transform.forward * 100;
8.                
9. _fireball = Instantiate(fireballPrefab) as GameObject;
10.                
11. //Place the fireball in front of the enemy and point in the same direction
12. Vector3 directionToShoot = objectpoint-startPoint;
13. _fireball.transform.position = startPoint;
14. _fireball.transform.rotation = transform.rotation;

 

Thanks for the help is very close but didnt work, perhaps its a mistake because you dont use the objectpoint nor the directionShoot.... you only use the direction shoot as i guess...

Here is a demo whats happening:
https://drive.google.com/open?id=1ChibWZwoct-qbMVzw7DLa-goenqqmmO8