JavaScript 3 Arrays questions

Question

Hello guys, I want to start with Unity java script but I can`t understand it even after 2 years Action Script 3 coding. Can you help me? I want to create a 2d array of game objects, so I wrote this:

 public var grass:Transform;
 public var gameobj : GameObject[];
 
 function Start () {
 
     for (var y = 0.0; y < 10; y++) {
             for (var x = 0.0; x < 10; x++) {
                 var sample = Mathf.PerlinNoise(1, 1);
                 Instantiate(grass);
                 grass.transform.position = Vector3 (x, y, 0);
                 gameobj.Add(grass);
                 //Debug.Log();
             }
     }
     
 }
 
 function Update () {
 
 }

But it will not work, I don`t understand why. How do you correctly create game objects from library? How do you push them in arrays?

Answer 1

Answer by robertbu · Oct 04, 2014 at 10:12 PM

You are stuffing the prefab into the array, not the game object you create. Try this:

 import System.Collections.Generic;

 public var grass:Transform;
 private var myList : List.<GameObject> = new List.<GameObject>();
  
 function Start () {
  
     for (var y = 0.0; y < 10; y++) {
             for (var x = 0.0; x < 10; x++) {
                 var sample = Mathf.PerlinNoise(1, 1);
                 var go : GameObject = Instantiate(grass);
                 go.transform.position = Vector3 (x, y, 0);
                 gameobj.Add(go);
             }
     }
  
 }

Note that your PerlinNoise() will always return the same value the way it is currently being called.

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Rokzero · Oct 04, 2014 at 10:22 PM 0

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Hi, thank you for your answer. But I`m still getting errors here. CreateWorld.js(25,25): Error BCE0019: 'Add' is not a member of 'UnityEngine.GameObject[,]'. (BCE0019) (Assembly-UnityScript)

robertbu · Oct 04, 2014 at 10:26 PM 0

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You are right. Built-in arrays don't have an Add() method. You need to use a generic list. Here is a quick, untested rewrite. More about the various collections here:

http://wiki.unity3d.com/index.php?title=Which_Kind_Of_Array_Or_Collection_Should_I_Use%3F

Rokzero · Oct 04, 2014 at 10:33 PM 0

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Hmm, it is too difficult to understand it now, I think I need to start with simple things... Do you know any good tutorials for beginners like me?

JavaScript 3 Arrays questions

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