C# Convert Vector3[] to Vector2[]

Questions & Answers
1

I tried looking for a specific Vector3 function that converts a Vector3 to a Vector2 but I wasn’t able to find anything named like toVector2() . Is there actually a function that converts a Vector3 to a Vector2 or will I need to create one from scratch?

3

Perhaps using extension methods in combination with Array.ConvertAll will be more close to your needs:

Add this extension to your script:

public static class MyVector3Extension
{
	public static Vector2[] toVector2Array (this Vector3[] v3)
	{
		return System.Array.ConvertAll<Vector3, Vector2> (v3, getV3fromV2);
	}
		
	public static Vector2 getV3fromV2 (Vector3 v3)
	{
		return new Vector2 (v3.x, v3.y);
	}
}

and use it like:

Vector2[] v2 = v3.toVector2Array ();

Here is an example enclosed:

using UnityEngine;
using System.Collections;

public class TestVectorConvert : MonoBehaviour
{
	// Use this for initialization
	void Start ()
	{
		Vector3[] v3 = new Vector3[5];
		for (int i = 0; i < 5; i++) {
			v3  *= new Vector3 (0.5f, 0.4f, 1.0f);*

  •  }*

  •  Vector2[] v2 = v3.toVector2 ();*

  •  for (int i = 0; i < 5; i++) {*

_ Debug.Log (v2 .ToString ());_
* }*
* }*

* // Update is called once per frame*
* void Update ()*
* {*

* }*
}

public static class MyVector3Extension
{
* public static Vector2[] toVector2 (this Vector3[] v3)*
* {*
* return System.Array.ConvertAll<Vector3, Vector2> (v3, getV3fromV2);*
* }*

* public static Vector2 getV3fromV2 (Vector3 v3)*
* {*
* return new Vector2 (v3.x, v3.y);*
* }*
}

2

There probably isn’t any so you can do you own:

Vector2[] ConvertArray(Vector3[] v3){
    Vector2 [] v2 = new Vector2[v3.Length];
    for(int i = 0; i <  v3.Length; i++){
        Vector3 tempV3 = v3*;*

v2 = new Vector2(tempV3.x, tempV3.y);
}
return v2;
}

4

the one liner way using linq library.

  using System.Linq;
         List<Vector3> v3positions = new List<Vector3>();
    
    
           List<Vector2> v2Positions => v3positions.Select((v3) => (Vector2)v3).ToList();