Grid generation

Learn to generate maps with a 2D grid.

2D Grid-Based Map Generation

Many strategy, puzzle, and roguelike titles are built on a 2D Grid matrix. Initializing int[,] map = new int[width, height]; allows assigning tile identities like grass, water, or wall to each cell.

int[,] map = new int[10, 10];
for (int x = 0; x < 10; x++) {
    for (int y = 0; y < 10; y++) {
        map[x, y] = 1; // 1 = Ground tile
    }
}

Nested for loops iterate across coordinates to generate the matrix layout.

Tile and Prefab Instantiation

Once the grid array is resolved, visual prefabs are spawned matching cell indices. Cell coordinates are scaled by tileSize to derive world positions.

Vector3 pos = new Vector3(x * tileSize, 0, y * tileSize);
Instantiate(tilePrefab, pos, Quaternion.identity);

This materializes the numeric memory matrix into an interactable world map.

Exercise Grid size configuration

Define a Start method. Inside, declare int gridBoyut = 16; and print "Grid boyutu: " + gridBoyut to the console.

Show example solution

using UnityEngine;

public class GridTester : MonoBehaviour
{
    void Start()
    {
        int gridBoyut = 16;
        Debug.Log("Grid boyutu: " + gridBoyut);
    }
}

Test yourself

Which data structure is best suited to store the tile type at each (x, y) cell coordinate on a 2D grid map?
- TextMeshPro font asset
- Rigidbody component
- AudioSource array
- Two-dimensional array (int[,])
Show answer

Two-dimensional array (int[,]) — Two-dimensional arrays (int[,]) natively represent row-and-column coordinates for grid cells.

Allocate grid matrix

int[,] gridMap = new int[____, height];

Show answer

int[,] gridMap = new int[width, height];

Grid map components

Grid

Cellular grid made of rows and columns
Tile

Tile piece placed into a grid cell
int[,]

Two-dimensional matrix data structure
tileSize

Physical distance spacing between cells

Next lesson: Dungeon generation

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