ParagonTime ParagonTime - 1 year ago 68
C# Question

Having some issues with procedurally generating a map

I'm building a very simple 2d tile map. It just spawns a few different grass tiles in random locations here's what it looks like:

public int tileHeight; //y
public int tileWidth; //x
int tileHeightCounter;
int tileWidthCounter;

public GameObject[] floorTiles;

void Start(){
tileHeightCounter = 0;
tileWidthCounter = 0;

while(tileHeightCounter < tileHeight){
Vector3 tileSpawnPoint = new Vector3 (tileWidthCounter, tileHeightCounter, 0);

GameObject groundTiles = (GameObject)Instantiate (floorTiles[Random.Range(0, floorTiles.Length)], tileSpawnPoint, Quaternion.identity);
groundTiles.transform.parent = transform;

if (tileWidthCounter == tileWidth) {
tileWidthCounter = 0;


I've run into two problems- say your tileHeight is 10 and your tileWidth is also 10 then the map it generates should be a 10x10 with 100 total tiles randomly distributed.

Instead two weird things are occurring the first is that if your map is 10x10 it actually generates a 10x9 meaning it stops one layer short on the y axis. The second is a grid(grass tile) is being created at 0,0 but the rest of the map is being created with at least x being 1 meaning that the map has a single tile attached to the bottom left sticking out.

I'm a bit confused as to whats going on here or how to fix it. Any help is much appreciated.

Answer Source

The issue is that you're using a < less than, so once it actually hits the tileHeight it exits the loop one iteration too early. Make it <=.

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