How can I make this for loop go down to the next row when done with 3?(READ FULL)

Questions & Answers
1

I have a for loop that makes buttons in a crate. I need it to be so that when the for loop makes 3 buttons, the buttons begin to start on the next row using the variable buttonHeight * cnt to control how far down they go. Can anyone help me out here?
Heres the script.
using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class OpenCrateScript : MonoBehaviour 
{
	static public bool lootCrateOpen = false;
	public float maxDistance;

	public Texture2D CrateWindow;
	public GUIStyle CrateSlotStyle;
	public GUIStyle CrateButtons;


	private List<Item> lootItems;
	private int buttonWidth = 78;
	private int buttonHeight = 78;
	void Start () 
	{
		maxDistance = 2.0f;
		lootItems = new List<Item> ();
		Populate ();
	}
	void Update ()
	{
		if (craftingMenu.craftingMenuOn == true || BuildingMenu.buildingMenuOn == true) 
		{
			lootCrateOpen = false;
		}
		if (Input.GetKeyUp(KeyCode.E) && lootCrateOpen == false) {
			RaycastHit hit;
			if (Physics.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition), out hit)) {
				if (hit.collider.CompareTag("Loot Crate") && Vector3.Distance(hit.collider.transform.position, transform.position) <= maxDistance) {
					lootCrateOpen = true;

				}
			}
		}
		else if (Input.GetKeyUp(KeyCode.E) && lootCrateOpen == true)
			{
				lootCrateOpen = false;
				inventorySystem.inventoryOn = false;
				inventorySystem.toolbarOn = false;
			}
		if (inventorySystem.inventoryOn == true && Input.GetKeyUp (KeyCode.E)) 
		{
			lootCrateOpen = false;
		}

	}
	void OnGUI()
	{
		if (lootCrateOpen == true) 
		{
			GUI.BeginGroup(new Rect(760,30,600,750), CrateWindow);
				for(int cnt = 0; cnt < lootItems.Count; cnt++)
					{
						GUI.Button (new Rect(buttonWidth * cnt,78,buttonWidth,buttonHeight),cnt.ToString(),CrateSlotStyle);
					}
			GUI.EndGroup();
			inventorySystem.inventoryOn = true;
			inventorySystem.toolbarOn = true;
		}
	}
	void OnMouseEnter()
	{

	}
	private void Populate()
	{
		for (int cnt = 0; cnt < 25; cnt++) 
		{
			lootItems.Add (new Item());
		}
	}
}

Tell me if you need more information! And thanks for any help.

2

You’ve got 2 options, use modulo or use 2 for loops

int offsetX = 100; //position for first button on X axis
int offsetY = 40; //position for first button on Y axis
int buttonWidth = 32;
int buttonHeight = 32;

modulo:

int totalButtons = 18;
int maxCols = 6;

for(int i = 0; i < totalButtons; i++){
   Rect r = new Rect ((i % maxCols) * buttonWidth + offsetX, (int)i / maxCols * buttonHeight + offsetY, buttonWidth, buttonHeight);
   //draw button using Rect r
}

two for loops:

int maxRows = 3;
int maxCols = 6;

int offsetX = 100; //start drawing on X axis from 100
    int offsetY = 40; //start drawing on Y axis from 40
    for(y = 0; y < maxRows; y++){
       for(x = 0; x < maxCols; x++){
          Rect r = new Rect (x * buttonWidth + offsetX, y * buttonHeight + offsetY, buttonWidth, buttonHeight);
          //draw button using Rect r
       }
    }

Both of these should draw 18 buttons in a 6 x 3 grid