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Question by NewGuy · Feb 24, 2013 at 09:10 AM · fpszoomsniper

Sniper Demo: When zoom the raycast change its aim !

Hello everyone..

Im trying to create a sniper demo. Now im in the biggining stage where im focusing on coding the FPS.

Project Specification: Unity FPS Model. I use raycast to aim on collider hit. Camera is a chld object of FPS, camera has two child objects. Bullets and Sniper.

Camera Script

     private var baseFOV : float;
      
     function Start () {
     baseFOV = Camera.main.fieldOfView;
     }
      
     function Update () {
     if (Input.GetMouseButton(1)){
             Camera.main.fieldOfView = 3;
         }else{
             Camera.main.fieldOfView = baseFOV;
         }
     }

Another Script in the camera called CrossHair

            var crosshairTexture : Texture2D;
            var crosshairTextureZoomed : Texture2D;
         static var OriginalOn = true;
         public    var position : Rect;
                     
     function Start()
     {
         
         position = Rect((Screen.width - crosshairTexture.width) / 2, 
                         (Screen.height - crosshairTexture.height) /3, 
                         crosshairTexture.width, 
                         crosshairTexture.height);
 
     }
 
      function Update(){       
 
 
          if (Input.GetMouseButton(1)){
             
             position = Rect((Screen.width - crosshairTextureZoomed.width) / 2, 
                         (Screen.height - crosshairTextureZoomed.height) /3, 
                         crosshairTextureZoomed.width, 
                         crosshairTextureZoomed.height);
         
                 
                                 
         }else{
         position = Rect((Screen.width - crosshairTexture.width) / 2, 
                         (Screen.height - crosshairTexture.height) /3, 
                         crosshairTexture.width, 
                         crosshairTexture.height);        
         }
 
 
 
     }
                              
     function OnGUI()
     {
     
         if (Input.GetMouseButton(1)){
         
             GUI.DrawTexture(position, crosshairTextureZoomed);
         }else{
             if(OriginalOn == true)
             {
                 GUI.DrawTexture(position, crosshairTexture);
                 //yield WaitForSeconds ( 2 );
             }
         }
     }





Bullets Script

Raycast script to shoot.

My Issue.

I have manually centered the Raycast aim to the center of the screen (almost the center)

When i zoom using the right mouse click The Aim of of the camera shoots on the ground. When i go higher and aim it goes higher...

IM I USING THE RIGHT WAY IN CREATING A SNIPER CHARACTER ? If you have a better way or a method please share.

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avatar image $$anonymous$$ · Feb 24, 2013 at 12:53 PM 0
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Where is the Raycast part?

avatar image robertbu · Feb 24, 2013 at 03:49 PM 0
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You didn't include the Raycast code so it is difficult to figure out your problem. Note you can construct a ray from the center of the screen by using something like:

    var ray = Camera.main.ViewportPointToRay(Vector3(0.5, 0.5, 0));

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