Prismáticos o mira telescópica en Unity 3d.

Saludos amigos, en esta ocasión os traigo un ejemplo de como crear unos prismáticos o mira telescópica para un arma.

Parte 1

Parte 2

#pragma strict

var camaraPrincipal : Camera;

var player : GameObject;
var marco : GameObject;

var activaPrismaticos : boolean = false;

var valorZoomInicial : int;
var valorZoom : int = 12;
var valorZoomMax : int = 15;
var valorZoomMin : int = 2;

var mensage : String = "";
var mensage2 : String = "";

function Start () {
 
 camaraPrincipal = Camera.main;
 valorZoomInicial = camaraPrincipal.camera.fieldOfView;
 DesactivaMarco ();
 rayoOn = false;
 
 
}

function Update () {
 
 
 if(Input.GetKeyDown (KeyCode.P)){
  SwitchPrismaticos ();
 }
 if(rayoOn){
  Rayo ();
  camaraPrincipal.camera.fieldOfView = valorZoom;
 }else{
  camaraPrincipal.camera.fieldOfView = valorZoomInicial;
 }
 
 LimitesZoom ();
 if(Input.GetButton ("Fire1") && rayoOn){
  MasZoom ();
 }
 if(Input.GetButton ("Fire2") && rayoOn){
  MenosZoom ();
 }
 
 BuscaTipoEnemigo ();
 BuscaTipoArma ();
 CreaArmaGUI ();
 
}

function OnGUI () {
 
 
 if(rayoOn){
  GUI.color = Color.green;
  GUI.Label (Rect (20, Screen.height - 40, 600, 20),"DISTANCIA: " + distancia + " m");
    }
 if(armaGUI != null){
  GUI.color = Color.green;
  GUI.Label (Rect (Screen.width - 60, Screen.height - 100, 100, 20),"" + mensage);
  GUI.Label (Rect (Screen.width - 60, Screen.height - 80, 100, 20),"" + mensage2);
 }
 
 
}

var rayoOn : boolean = false;
var longitudRayo : int = 100;
var col : Collider;
var tagObj : String;
var objeto : Transform;
var distancia : float;

function Rayo () {
 
 var ray = new Ray (camaraPrincipal.transform.position, camaraPrincipal.transform.forward);
 var hit : RaycastHit = new RaycastHit();
 if (Physics.Raycast (ray.origin, ray.direction,  hit, longitudRayo)){
  Debug.DrawRay (camaraPrincipal.transform.position, camaraPrincipal.transform.forward * longitudRayo, Color.red);
  col =  hit.collider;
  tagObj = col.transform.root.tag;
  objeto = col.transform.root;
  distancia = Mathf.RoundToInt(Vector3.Distance(player.transform.position, hit.point));
 }else{
  col =  null;
  tagObj = null;
  objeto = null;
  distancia = 0;
 }
 
}

function SwitchPrismaticos () {
 
 if(activaPrismaticos){
  activaPrismaticos = false;
  MotorOn ();
  DesactivaMarco ();
  rayoOn = false;
 }else{
  activaPrismaticos = true;
  MotorOff ();
  ActivaMarco ();
  rayoOn = true;
 }
}

function MotorOn () {
 
 if(player != null){
  var script : CharacterMotor = player.GetComponent("CharacterMotor");
  script.enabled = true;
 }
 
}

function MotorOff () {
 
 if(player != null){
  var script : CharacterMotor = player.GetComponent("CharacterMotor");
  script.enabled = false;
 }
 
}

function ActivaMarco () {
 
 if(marco != null){
  marco.renderer.enabled = true;
 }
 
}

function DesactivaMarco () {
 
 if(marco != null){
  marco.renderer.enabled = false;
 }
 
}

function MasZoom () {
 
 valorZoom += 1;
 
}

function MenosZoom () {
 
 valorZoom -= 1;
 
}

function LimitesZoom () {
 
 if(valorZoom < valorZoomMin){
  valorZoom = valorZoomMin;
 }
 if(valorZoom > valorZoomMax){
  valorZoom = valorZoomMax;
 }
 
}

enum TIPOENEMIGO {
 
 SinEnemigo = 0,
 Infanteria = 1,
 Artilleria = 2,
 Vehiculo = 3,
 
}

var _tipoEnemigo : TIPOENEMIGO;
var esEnemigo : boolean = false;

function BuscaTipoEnemigo () {
 
 if(objeto != null && objeto.GetComponent(Enemigo)){
  _tipoEnemigo = objeto.GetComponent(Enemigo)._tipoEnemigo;
  esEnemigo = true;
 }else if(objeto != null && !objeto.GetComponent(Enemigo)){
  _tipoEnemigo = TIPOENEMIGO.SinEnemigo;
  esEnemigo = false;
 }else if(objeto == null){
  _tipoEnemigo = TIPOENEMIGO.SinEnemigo;
  esEnemigo = false;
 }
 
}

var tieneArma : boolean = false;
var arma : Transform;

function BuscaTipoArma () {
 
 if(esEnemigo){
  if(_tipoEnemigo == TIPOENEMIGO.Infanteria){
   for (var child : Transform in objeto.transform) {
    if (child.CompareTag ("Arma")) {
     tieneArma = true;
     arma = child;
     break;
    }else{
     tieneArma = false;
     arma = null;
    }
   }
   escala = 0.006;
   mensage = "Arma: ";
   if(arma !=  null){
    mensage2 = "" + arma.gameObject.name;
   }
  }
  if(_tipoEnemigo == TIPOENEMIGO.Artilleria){
   arma = objeto.transform;
   tieneArma = true;
   escala = 0.002;
   mensage = "Artilleria: ";
   mensage2 = "" + arma.gameObject.name;
  }
  if(_tipoEnemigo == TIPOENEMIGO.Vehiculo){
   arma = objeto.transform;
   tieneArma = true;
   escala = 0.002;
   mensage = "Vehiculo: ";
   mensage2 = "" + arma.gameObject.name;
  }
  
 }else{
  tieneArma = false;
  arma = null;
 }
 
}

var armaGUI : Transform;
var posArmaGUI : Vector3;   // X = 0.04; Y = -0.025; Z = -0.01
var creadaArmaGUI : boolean = false;
var capaGUI : int;
var gradosRotacion : int = 45;
var escala : float = 0.006;

function CreaArmaGUI () {
 
 if(arma != null && !creadaArmaGUI){
  armaGUI = Instantiate (arma,marco.transform.position + posArmaGUI, Quaternion.identity);
  armaGUI.gameObject.layer = capaGUI;
  if(armaGUI.gameObject.collider){
   armaGUI.gameObject.collider.enabled = false;
  }
  for (var child : Transform in armaGUI) {
   child.gameObject.layer = capaGUI;
   if(child.gameObject.collider){
    child.gameObject.collider.enabled = false;
   }
  }
  armaGUI.parent = transform;
  armaGUI.localScale = Vector3(escala,escala,escala);
  creadaArmaGUI = true;
 }
 if(arma == null && armaGUI != null){
  Destroy (armaGUI.gameObject);
  armaGUI = null;
  creadaArmaGUI = false;
 }
 if(armaGUI != null){
  armaGUI.Rotate(Vector3.up * Time.deltaTime * gradosRotacion, Space.World);
 }
 
}