Push into Two-Dimensional Array

Questions & Answers
1

Here is my two-dimensional array:

var terrainArray: int[,] = new int[gridRows, gridCols];

I want to be able to add an additional Row (or Column) to this Array at will, and populate it. How would I go about doing this?

Why?: I’m making an infinite tile-based Terrain generator, and as the player approaches the edge of the grid, a new row or column is made and generated on the fly.

Thank-you in advance for any help.

3

You can’t resize a 2D array. You can make a new array with a different size and copy the contents over, but that’s not really a good idea. It would be better to just keep the array the same size, and move content around as needed. So when the player approaches an edge, shift the contents so that the old stuff on the opposite edge is removed to make room for the new stuff.

2

I will use c# but it is pretty similar in JS.

using UnityEngine;
using System.Collections;

public class Test : MonoBehaviour {
	
	// Declare 2d array
	public int [,] Tablica;
	
	void Start () {
		// Set size 128x128
		Tablica = new int[128,128];
		// Write into array position 115,5 / value 987
		Tablica[115,5] = 987;
		// Read from array position 115,5 and print it as string
		print (Tablica[115,5].ToString());
	}
	
	void Update () {
		
	}
}