New to Unity3d - NullReferenceException

Question

Hello everyone. Im new to Unity3d programming and I wanted to know whats going wrong on my code. Ive got this error but I dont know why actually:

NullReferenceException: Object reference not set to an instance of an object.

ChangeColor.cs

using UnityEngine; using System.Collections;

public class ChangeColor : MonoBehaviour {

 public Color corAcesa, corApagada;
 public int numeroCubo;
 public GameManagerAula2 gameManager;

 public void OnMouseDown() {
     if(gameManager.getTurno()==1) {
         gameManager.setNumeroDoCubo(getNumeroCubo());
         StartCoroutine(acenderCor());
     }
 }

 public IEnumerator acenderCor() {

     renderer.material.color=getCorAcesa();
     yield return new WaitForSeconds(0.5f);
     renderer.material.color=getCorApagada();
 }

 public int getNumeroCubo() {
     return this.numeroCubo;
 }

 public Color getCorAcesa() {
     return this.corAcesa;
 }

 public Color getCorApagada() {
     return this.corApagada;
 }

 public void iniciaCubo() {
     renderer.material.color=this.getCorApagada();
 }

 public void resetaCubo() {
     renderer.material.color=Color.black;
 }

}

GameManagerAula2.cs

using UnityEngine; using System.Collections; using System.Collections.Generic;

public class GameManagerAula2 : MonoBehaviour {

 public List&lt;ChangeColor&gt; listaCubo; //lista dos cubos
 public List&lt;int&gt; ordem;             //ordem dos cubos
 public int cubo;                    //cubo selecionado
 public int numeroTurno=0;           //numero do turno
 public int turno=0;                 //0=computer, 1=player

 void Start() {
     iniciaCor();
     StartCoroutine(turnoComputador());
 }

 public IEnumerator turnoComputador() {

     cubo=Random.Range(0,4);
     ordem.Add(cubo);

     //adicionar tempo a primeira jogada
     if (numeroTurno==0) {
         yield return new WaitForSeconds(1.5f);
     }

     foreach (int i in this.ordem) {
         StartCoroutine(listaCubo[i].acenderCor());
         yield return new WaitForSeconds(1.5f);
     }

     mudaTurnoJogador();
     StartCoroutine(turnoJogador());
     yield return 0;
 }

 public IEnumerator turnoJogador() {

     while(cubo==-1) {
         yield return 0;
     }

     //acerto
     if(ordem[numeroTurno]==cubo) {
         cubo=-1;
         incrementaNumeroTurno();
         if(numeroTurno==ordem.Count) {
             resetaNumeroTurno();
             mudaTurnoComputador();
             StartCoroutine(turnoComputador());
         }
         else {
             mudaTurnoJogador();
             StartCoroutine(turnoJogador());
         }           
     }
     //erro
     else {
         resetaJogo();
         yield return new WaitForSeconds(2);
         iniciaCor();
         StartCoroutine(turnoComputador());
     }

     yield return 0;
 }

 public int getTurno() {
     return this.turno;
 }

 public void mudaTurnoComputador() {
     this.turno = 0;
 }

 public void mudaTurnoJogador() {
     this.turno = 1;
 }

 public void resetaNumeroTurno() {
     this.numeroTurno = 0;
 }

 public void incrementaNumeroTurno() {
     this.numeroTurno++;
 }

 public void setNumeroDoCubo(int numeroDoCubo) {
     this.cubo = numeroDoCubo;
 }

 public void iniciaCor() {
     for(int i=0;i&lt;=3;i++) {
         listaCubo[i].iniciaCubo();
     }
 }

 public void resetaCor() {
     for(int i=0;i&lt;=3;i++) {
         listaCubo[i].resetaCubo();
     }
 }

 public void resetaOrdem() {
     this.ordem.Clear();
 }

 public void resetaJogo() {
     this.mudaTurnoComputador();
     this.resetaOrdem();
     this.resetaCor();
 }

}

Ive got the get/set on GameManagerAula2 class. I followed an example where that would works but as I coded I just realized that something is wrong and I really dont know why. This is no serious business work or something like that, its just some exercise from some Unity3d classes Im having (but since there are some days left until next class I`m asking it here).

This is a little game where the pc chooses a random cube (4 cubes) and wait for the player to click on it. Then the pc plays again and choose the previous cube +1, (...) rinse and repeat.

I know the game isnt ready yet but this error is freaking me out because I cant test the click.

Thanks in advance.

Answer 1

Best Answer

Answer by Henrique Vilela · May 06, 2011 at 04:04 AM

Looks like you forgot to set the variables corAcesa, corApagada and/or gameManager though the inspector. Am I right?

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ncgty · May 06, 2011 at 01:26 PM 0

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actually I did the corAcesa, corApagada and also numero, but yeah you lighten me up.. I didn`t set the game$$anonymous$$anager thru the inspector. ><

so silly but it was soo late I coudldnt think of that.. thanks.

New to Unity3d - NullReferenceException

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