using UnityEngine;
using System.Collections;

public class Crosshair : MonoBehaviour
{

     public Texture2D tx;
     public float maxSize = 100.0F;
     public float minSize = 20.0F;
     public float changeSpeed = 0.1F;
     float tempRange = 0.0F;

    void Update()
  {
   if (Input.GetButton ("Fire1"))  
   {
          if (tempRange < maxSize)
          {
              tempRange += changeSpeed;
          }
   }
   else
   {
    if (tempRange > 0)
    {
     tempRange -= changeSpeed;
    }
   }
  }

     void OnGUI()
     {

         GUI.DrawTexture(new Rect(Screen.width / 2 - 35 - tempRange, Screen.height / 2-1, 20, 2), tx);// левая риска
   GUI.DrawTexture(new Rect(Screen.width / 2 + 15 + tempRange, Screen.height / 2-1, 20, 2), tx);// правая риска
   GUI.DrawTexture(new Rect(Screen.width / 2-1, Screen.height / 2 - 35 - tempRange, 2, 20), tx);// верхняя риска  
   GUI.DrawTexture(new Rect(Screen.width / 2-1, Screen.height / 2 + 15 + tempRange, 2, 20), tx);// нижняя риска  
     }

}