Procedural terrain bug?

Questions & Answers
1

My problem is that the first 9 tiles are generated wrong, the only difference in the function is that it instantiates the Plane instead of moving it.

First nine tiles, when the player is spawned:
[33382-screenshot+2014-10-07+19.35.03.png|33382]

The tiles, if the player moves to the side and return to the first nine generated tiles.
[33383-screenshot+2014-10-07+19.36.55.png|33383]
So the two pictures of tiles above show the “Same” tiles, A.K.A. the tiles have the same world position.

	var t : GameObject;
	var tmp = GameObject.Find("Chunk "+fromnx+","+fromnz);
	var ChunkPosX : float = terrainSize * nx;
    var ChunkPosZ : float = terrainSize * nz;
	if (fromnx == Mathf.Infinity && fromnz == Mathf.Infinity || tmp == null) {
		t = GameObject.Instantiate(plane, Vector3(ChunkPosX, 0, ChunkPosZ), Quaternion.identity);
	} else if (tmp != null) {
		t = tmp;
		t.transform.position = Vector3(ChunkPosX, 0, ChunkPosZ);
	}

First 9 tiles:

function GenerateStandardTiles(pp : Vector3) {
    //Player position divided by terrainSize(Width of terrain mesh)
	var tx = Mathf.RoundToInt(pp.x / terrainSize);
    var tz = Mathf.RoundToInt(pp.z / terrainSize);
	UpdateTile(Mathf.Infinity,Mathf.Infinity,tx,tz);
	UpdateTile(Mathf.Infinity,Mathf.Infinity,tx,tz + 1);
	UpdateTile(Mathf.Infinity,Mathf.Infinity,tx + 1,tz);
	UpdateTile(Mathf.Infinity,Mathf.Infinity,tx + 1,tz + 1);
	UpdateTile(Mathf.Infinity,Mathf.Infinity,tx - 1,tz);
	UpdateTile(Mathf.Infinity,Mathf.Infinity,tx - 1,tz + 1);
	UpdateTile(Mathf.Infinity,Mathf.Infinity,tx - 1,tz - 1);
	UpdateTile(Mathf.Infinity,Mathf.Infinity,tx + 1,tz - 1);
	UpdateTile(Mathf.Infinity,Mathf.Infinity,tx,tz - 1);
}

Tiles generated after:

function GC(x : int, z : int, pp : Vector3) {
    var tx = Mathf.RoundToInt(pp.x / terrainSize);
    var tz = Mathf.RoundToInt(pp.z / terrainSize);
	if (x == 1) {
		UpdateTile(tx - 2, tz, tx + 1, tz);
		UpdateTile(tx - 2, tz + 1, tx + 1, tz + 1);
		UpdateTile(tx - 2, tz - 1, tx + 1, tz - 1);
		status = "1x";
	}
	if (x == -1) {
		UpdateTile(tx + 2, tz, tx - 1, tz);
		UpdateTile(tx + 2, tz + 1, tx - 1, tz + 1);
		UpdateTile(tx + 2, tz - 1, tx - 1, tz - 1);
		status = "-1x";
	}
	if (z == 1) {
		UpdateTile(tx, tz - 2, tx, tz + 1);
		UpdateTile(tx + 1, tz - 2, tx + 1, tz + 1);
		UpdateTile(tx - 1, tz - 2, tx - 1, tz + 1);
		status = "1z";
	}
	if (z == -1) {
		UpdateTile(tx, tz + 2, tx, tz - 1);
		UpdateTile(tx + 1, tz + 2, tx + 1, tz - 1);
		UpdateTile(tx - 1, tz + 2, tx - 1, tz - 1);
		status = "-1z";
	}
}
2

Okay, I figured out the error, the Seed variable wasn’t set when the first tiles were generated, so the seed was 0 for the first 9 tiles and the “real” seed for the rest, which made the “bug” occur.