Calling class outside of an object

Unity Engine
1

I have test CODE #1 to load strategy game information for map terrain and units. At anytime a player can exit to the main menu to load a new game. CODE #1 is in a separate class which requires no object.

CODE #1

using UnityEngine;
using System.Collections;

public class LoadCGN {
	
	//loads terrain data from file into array from random numbers.  Later this will be a file read.
	public void TerrainMap () {
		for(int x=0; x < Game.fullMapDimX; x++) {
			for(int y=0; y < Game.fullMapDimY; y++) {
			Game.terrainMap[x,y] = Random.Range(1,480);
			}
		}
	}
	
	public void UnitMap () {
		for(int x=0; x < Game.fullMapDimX; x++) {
			for(int y=0; y < Game.fullMapDimY; y++) {
			Game.unitMap[x,y] = Random.Range(1,8);
			}
		}
	}	
	
}

CODE #2 is suppose to load the data from the CODE#1 above and create the map mesh.

CODE #2

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

[RequireComponent(typeof(MeshFilter))]
[RequireComponent(typeof(MeshRenderer))]

public class TerrainMeshBuilder : MonoBehaviour
{
		//other code here
		LoadCGN.TerrainMap ();    //load map data
		//build mesh code here
}

I keep getting the error below and I can’t find a “laymen’s terms” answer on it via my research.

Assets/Scripts/TerrainMeshBuilder.cs(58,25): error CS0120: An object reference is required to access non-static member `LoadCGN.TerrainMap()’

2

Nevermind I figured it out myself accidentally.

public static void TerrainMap ()

public static void UnitMap ()

instead of

public void TerrainMap ()

public void UnitMap ()
3

Alternately, and without the use of statics-

LoadCGN cgn = new LoadCGN();
cgn.TerrainMap();
4

You can also make a reference variable to an object with the script and use,

var myObject; //assign publicly through inspector programmatically find the object in the scene using, GameObject.FindGameObjectWithTag(“Tag”);

myObject.GetComponent().CallMethod();

5

Thanks guys. I put both those in my notes. Procedural programmer getting use to OOP. Slowly I’m getting it.

6

The main thing is - you said LoadCGN “doesn’t require an object” when, in actuality, it is an object. :slight_smile: