Implicit downcast from 'Object[]' to 'UnityEngine.GUITexture[]'

Question

Hi, i am very noob in Unity and in programming. I try to follow some tutorials but in one point of the track i get stuck with this error: Implicit downcast from 'Object[]' to 'UnityEngine.GUITexture[]'. InvalidCastException: Cannot cast from source type to destination type. Showlives..ctor () (at Assets/Juego Shooter/Scripts/Showlives.js:4)

I see that the problem is in the line 4 of my code but i don´t know what are wrong.

 #pragma strict
 
 var livetexture:Texture;//La textura que corresponde a las vidas restantes
 var lives:GUITexture[]=[null,null,null];//el numero de vidas
 var texto:GUIText;//El texto que indica fin de juego
 var texto2:GUIText;//El texto que indica las instrucciones
 
 function Update () {
     
     if(Globals.Lives==3)
     {
     lives[2].color.a=128;
     lives[1].color.a=128;
     lives[0].color.a=128;
     }
     
     if(Globals.Lives==2)
     {
     lives[2].color.a=0;
     lives[1].color.a=128;
     lives[0].color.a=128;
     }    
 
     if(Globals.Lives==1)
     {
     lives[2].color.a=0;
     lives[1].color.a=0;
     lives[0].color.a=128;
     }
 
     if(Globals.Lives==0)
     {//cuando el numero de vidas llega a 0, se muestra pantalla Game Over y si pulsamos boton asignado vamos a menu principal
     lives[2].color.a=0;
     lives[1].color.a=0;
     lives[0].color.a=0;
     texto.text="Game Over";
     texto2.text="Pulsa ESPACIO para Continuar";
         if(Input.GetButtonDown("Jump"))
         {
         Globals.Levels=0;
         Application.LoadLevel(Globals.Levels);
         }    
     }
 }

Answer 1

Answer by Benproductions1 · Mar 29, 2014 at 11:27 PM

Since null does not have a type, Unityscript can't infer the type of your array literal. To make Unityscript infer the type, you can explicitly state the type of null reference:

 var lives:Type[] = [null as Type];

For more simplicity, you can simply cast the entire stay to the type of array you need:

 var lives:Type[] = [null] as Type [];

But since you are just making a bunch of null reference, which are the default value for reference type arrays, you can simply make a new stay:

 var lives:Type[] = new Type[3];

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Implicit downcast from 'Object[]' to 'UnityEngine.GUITexture[]'

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