Can't build a Vector3 array

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TLDR: Anyone have a working solution for inserting Vector3's into an array?

Hello friends, I'm trying to build a Vector3 array to store a bunch of locations. I started by simply using

var positions = Vector3[]

However, I soon learned that you can't use .Push or .Add with Vector3 for whatever reason. So I searched and found this solution: [http://answers.unity3d.com/questions/60191/arraypush-for-vector3-or-how-to-add-items-to-vecto.html][1]

So I tried using his first sample code:

 import System.Collections.Generic;

  var positions = List.();

  function AddItem (var item : Vector3) {

       positions.Add(item);

However, Unity would give errors regarding an "Unexepected token" for the period on var positions = List.();. I tried to remove the period, and got this error: BCE0157: Generic types without all generic parameters defined cannot be instantiated. Thats about the limit of what I know about List, so I decided to try his next solution.

  var positions : Vector3[];

  function AddItem (var item : Vector3) : Vector3[] {

      var temp : Vector3[] = new Vector3[positions.Length + 1];

      temp[temp.Length - 1] = item;

      for(var i : int = 0; i < positions.Length; i++) {

           temp[i] = positions[i];

There were no errors on this code, however for whatever reason, this doesn't actually insert data into the positions array! I checked that the item parameter is passing through successfully on AddItem(), and it is. So its just not being stored in the array for whatever reason.

If anyone has a working solution to this, would be much appreciated! Thanks [1]: http://answers.unity3d.com/questions/60191/arraypush-for-vector3-or-how-to-add-items-to-vecto.html125

Answer 1

Best Answer

Answer by Jesus_Freak · Jun 30, 2011 at 08:17 AM

in your first code, just replace positions with:

 import System.Collections.Generic;
 
 var positions = List.<Vector3>();
 function AddItem(var item : Vector3) {
     positions.Add(item);
 }

that way, you can keep you var names. and that will work.

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Answer 2

Answer by GuyTidhar · Jun 30, 2011 at 08:16 AM

You can use "Array" (http://unity3d.com/support/documentation/ScriptReference/Array.html)

 var vectorArray : Array = new Array();
 function AddItem(item : Vector3)
 {
   vectorArray.Add(item);
 }

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coryl · Jun 30, 2011 at 08:47 AM 0

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Hi, I think this doesn't work. I'm running another function that will utilize the vectorArray[i] as a parameter. However, the parameter is set to a Vector3 type, and I think this type of array is just an Object type? Unity spits back: "The best overload for the method (..UnityEngine.Vector3)is not compatible with the argument list (..Object). Thanks for your help though!

Eric5h5 · Jun 30, 2011 at 03:42 PM 0

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Array is slow and not statically typed. List is much better.

GuyTidhar · Jun 30, 2011 at 04:49 PM 0

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I never use array. Work in C# anyways.

Can't build a Vector3 array

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