Unity: Crosshair

CrossHair

using UnityEngine;
using System.Collections;
 
public class CrossHair : MonoBehaviour {
    
    
    // Use this for initialization
    
    public enum preset { none, shotgunPreset, crysisPreset }
    public preset crosshairPreset = preset.none;
    
    public bool showCrosshair = true;
    public Texture2D verticalTexture ;
    public Texture2D horizontalTexture ;
    
    //Size of boxes
    public float cLength = 10.0f;
    public float cWidth = 3.0f;
    
    //Spreed setup
    public float minSpread = 45.0f;
    public float maxSpread = 250.0f;
    public float spreadPerSecond = 150.0f;
    
    //Rotation
    public float rotAngle = 0.0f;
    public float rotSpeed = 0.0f;
    
    [HideInInspector] public Texture2D temp;
    [HideInInspector] public float spread;
    
    void Start ()
    {
        crosshairPreset = preset.none;
    }
    
    void Update()
    {
            //Used just for test (weapon script should change spread).
            if(Input.GetKey(KeyCode.K)) spread += spreadPerSecond * Time.deltaTime;
            else spread -= spreadPerSecond * 2 * Time.deltaTime;   
           
            //Rotation
            rotAngle += rotSpeed * Time.deltaTime;
    }
    
    void OnGUI(){
            if(showCrosshair && verticalTexture && horizontalTexture){
                       GUIStyle verticalT = new GUIStyle();
                       GUIStyle horizontalT = new GUIStyle();
                    verticalT.normal.background = verticalTexture;
                    horizontalT.normal.background = horizontalTexture;
                    spread = Mathf.Clamp(spread, minSpread, maxSpread);
                    Vector2 pivot = new Vector2(Screen.width/2, Screen.height/2);
                   
                    if(crosshairPreset == preset.crysisPreset){
                           
                            GUI.Box(new Rect((Screen.width - 2)/2, (Screen.height - spread)/2 - 14, 2, 14), temp, horizontalT);
                            GUIUtility.RotateAroundPivot(45,pivot);
                            GUI.Box(new Rect((Screen.width + spread)/2, (Screen.height - 2)/2, 14, 2), temp, verticalT);
                            GUIUtility.RotateAroundPivot(0,pivot);
                            GUI.Box(new Rect((Screen.width - 2)/2, (Screen.height + spread)/2, 2, 14), temp, horizontalT);
                    }
                   
                    if(crosshairPreset == preset.shotgunPreset){
                   
                            GUIUtility.RotateAroundPivot(45,pivot);
                           
                            //Horizontal
                            GUI.Box(new Rect((Screen.width - 14)/2, (Screen.height - spread)/2 - 3, 14, 3), temp, horizontalT);
                            GUI.Box(new Rect((Screen.width - 14)/2, (Screen.height + spread)/2, 14, 3), temp, horizontalT);
                            //Vertical
                            GUI.Box(new Rect((Screen.width - spread)/2 - 3, (Screen.height - 14)/2, 3, 14), temp, verticalT);
                            GUI.Box(new Rect((Screen.width + spread)/2, (Screen.height - 14)/2, 3, 14), temp, verticalT);
                    }
                   
                    if(crosshairPreset == preset.none){
                   
                            GUIUtility.RotateAroundPivot(rotAngle%360,pivot);
                           
                            //Horizontal
                            GUI.Box(new Rect((Screen.width - cWidth)/2, (Screen.height - spread)/2 - cLength, cWidth, cLength), temp, horizontalT);
                            GUI.Box(new Rect((Screen.width - cWidth)/2, (Screen.height + spread)/2, cWidth, cLength), temp, horizontalT);
                            //Vertical
                            GUI.Box(new Rect((Screen.width - spread)/2 - cLength, (Screen.height - cWidth)/2, cLength, cWidth), temp, verticalT);
                            GUI.Box(new Rect((Screen.width + spread)/2, (Screen.height - cWidth)/2, cLength, cWidth), temp, verticalT);
                    }
            }
    }
}

OneManArmy
http://armedunity.com/topic/1729-dynamic-crosshair-script/