Unity3d Terrain Generation Instantiates to much prefabs - algorithm

Question

I've got a block of code in my 'Update()' function wich gets the active chunk in my scene, when it has found that chunk, it passes those coordinates to the 'generateFromMiddleOfChunk()' function. That function will generate all the chunks in a 3 radius around the player, it does that with 25 'Instantiate()' functions and a formula. But it only should instantiate the chunks where there isn't already a chunk. It doesn't do that, if anyone could take a look at my code, I would greatly appreciate that. I'm sorry for the very repetetive code and alot of Debug.Log() functions. Every help is greatly appreciated, thank you very much.
Jordi,
I've got this block of code in my Update() function:
function Update() {
var gameObjects : GameObject[] = FindObjectsOfType(GameObject) as GameObject[];
for (var i = 0; i < gameObjects.length ; i++) {
if(gameObjects[i].name.Substring(0,6) == "ACTIVE")
if(gameObjects[i].tag != "Player") {
var xco = gameObjects[i].transform.position.x;
var yco = gameObjects[i].transform.position.y;
var zco = gameObjects[i].transform.position.z;
Debug.Log(xco.ToString()+yco.ToString()+zco.ToString());
generateFromMiddleOfChunk(xco, yco, zco);
}
}
}
This block of codes get the chunk in my scene and gets its x, y and z coordinates, it passes those coordinates to the generateFromMiddleOfChunk() function. This function looks like this:
function generateFromMiddleOfChunk(xco : int, yco : int, zco : int) {
//V1
chunk1 = "Chunk (" + xco.ToString() + ", " + yco.ToString() + ", " + zco.ToString() + ")";
chunk2 = "Chunk (" + (xco + chunkWidth).ToString() + ", " + yco.ToString() + ", " + (zco+chunkWidth).ToString() + ")";
chunk3 = "Chunk (" + (xco + chunkWidth).ToString() + ", " + yco.ToString() + ", " + zco.ToString() + ")";
chunk4 = "Chunk (" + (xco + chunkWidth).ToString() + ", " + yco.ToString() + ", " + (zco * -1).ToString() + ")";
chunk5 = "Chunk (" + (xco + chunkWidth * -1).ToString() + ", " + yco.ToString() + ", " + (zco+chunkWidth).ToString() + ")";
chunk6 = "Chunk (" + (xco + chunkWidth * -1).ToString() + ", " + yco.ToString() + ", " + zco.ToString() + ")";
chunk7 = "Chunk (" + (xco + chunkWidth * -1).ToString() + ", " + yco.ToString() + ", " + (zco * -1).ToString() + ")";
chunk8 = "Chunk (" + xco.ToString() + ", " + yco.ToString() + ", " + (zco + chunkWidth).ToString() + ")";
chunk9 = "Chunk (" + xco.ToString() + ", " + yco.ToString() + ", " + (zco * -1).ToString() + ")";
chunk10= "Chunk (" + (xco + chunkWidth * -2).ToString() + ", " + yco.ToString() + ", " + (zco + 2 * chunkWidth).ToString() + ")";
chunk11= "Chunk (" + (xco + chunkWidth * -2).ToString() + ", " + yco.ToString() + ", " + (zco + chunkWidth).ToString() + ")";
chunk12= "Chunk (" + (xco + chunkWidth * -2).ToString() + ", " + yco.ToString() + ", " + zco.ToString() + ")";
chunk13= "Chunk (" + (xco + chunkWidth * -2).ToString() + ", " + yco.ToString() + ", " + (zco * -1).ToString() + ")";
chunk14= "Chunk (" + (xco + chunkWidth * -2).ToString() + ", " + yco.ToString() + ", " + (zco + -2 * chunkWidth).ToString() + ")";
chunk15= "Chunk (" + (xco + chunkWidth * -1).ToString() + ", " + yco.ToString() + ", " + (zco + 2 * chunkWidth).ToString() + ")";
chunk16= "Chunk (" + (xco + chunkWidth * -1).ToString() + ", " + yco.ToString() + ", " + (zco + -2 * chunkWidth).ToString() + ")";
chunk17= "Chunk (" + xco.ToString() + ", " + yco.ToString() + ", " + (zco + 2 * chunkWidth).ToString() + ")";
chunk18= "Chunk (" + xco.ToString() + ", " + yco.ToString() + ", " + (zco + -2 * chunkWidth).ToString() + ")";
chunk19= "Chunk (" + (xco + chunkWidth).ToString() + ", " + yco.ToString() + ", " + (zco + 2 * chunkWidth).ToString() + ")";
chunk20= "Chunk (" + (xco + chunkWidth).ToString() + ", " + yco.ToString() + ", " + (zco + -2 * chunkWidth).ToString() + ")";
chunk21= "Chunk (" + (xco + 2 * chunkWidth).ToString() + ", " + yco.ToString() + ", " + (zco + 2 * chunkWidth).ToString() + ")";
chunk22= "Chunk (" + (xco + 2 * chunkWidth).ToString() + ", " + yco.ToString() + ", " + (zco + chunkWidth).ToString() + ")";
chunk23= "Chunk (" + (xco + 2 * chunkWidth).ToString() + ", " + yco.ToString() + ", " + zco.ToString() + ")";
chunk24= "Chunk (" + (xco + 2 * chunkWidth).ToString() + ", " + yco.ToString() + ", " + (zco * -1).ToString() + ")";
chunk25= "Chunk (" + (xco + 2 * chunkWidth).ToString() + ", " + yco.ToString() + ", " + (zco + -2 * chunkWidth).ToString() + ")";
var chunksInScene : GameObject[] = FindObjectsOfType(GameObject) as GameObject[];
for (var i = 0; i < chunksInScene.length ; i++) {
if(chunksInScene[i].name.Substring(0,5) == "Chunk" || chunksInScene[i].name.Substring(0,5) == "_TERR" || chunksInScene[i].name.Substring(0,5) == "ACTIV") {
if(chunksInScene[i].tag != "Player") {
var oldXco = chunksInScene[i].transform.position.x;
var oldYco = chunksInScene[i].transform.position.y;
var oldZco = chunksInScene[i].transform.position.z;
oldChunk1 = "Chunk (" + oldXco.ToString() + ", " + oldYco.ToString() + ", " + oldZco.ToString() + ")";
oldChunk2 = "Chunk (" + (oldXco + chunkWidth).ToString() + ", " + oldYco.ToString() + ", " + (oldZco+chunkWidth).ToString() + ")";
oldChunk3 = "Chunk (" + (oldXco + chunkWidth).ToString() + ", " + oldYco.ToString() + ", " + oldZco.ToString() + ")";
oldChunk4 = "Chunk (" + (oldXco + chunkWidth).ToString() + ", " + oldYco.ToString() + ", " + (oldZco * -1).ToString() + ")";
oldChunk5 = "Chunk (" + (oldXco + chunkWidth * -1).ToString() + ", " + oldYco.ToString() + ", " + (oldZco+chunkWidth).ToString() + ")";
oldChunk6 = "Chunk (" + (oldXco + chunkWidth * -1).ToString() + ", " + oldYco.ToString() + ", " + oldZco.ToString() + ")";
oldChunk7 = "Chunk (" + (oldXco + chunkWidth * -1).ToString() + ", " + oldYco.ToString() + ", " + (oldZco * -1).ToString() + ")";
oldChunk8 = "Chunk (" + oldXco.ToString() + ", " + oldYco.ToString() + ", " + (oldZco + chunkWidth).ToString() + ")";
oldChunk9 = "Chunk (" + oldXco.ToString() + ", " + oldYco.ToString() + ", " + (oldZco * -1).ToString() + ")";
oldChunk10= "Chunk (" + (oldXco + chunkWidth * -2).ToString() + ", " + oldYco.ToString() + ", " + (oldZco + 2 * chunkWidth).ToString() + ")";
oldChunk11= "Chunk (" + (oldXco + chunkWidth * -2).ToString() + ", " + oldYco.ToString() + ", " + (oldZco + chunkWidth).ToString() + ")";
oldChunk12= "Chunk (" + (oldXco + chunkWidth * -2).ToString() + ", " + oldYco.ToString() + ", " + oldZco.ToString() + ")";
oldChunk13= "Chunk (" + (oldXco + chunkWidth * -2).ToString() + ", " + oldYco.ToString() + ", " + (oldZco * -1).ToString() + ")";
oldChunk14= "Chunk (" + (oldXco + chunkWidth * -2).ToString() + ", " + oldYco.ToString() + ", " + (oldZco + -2 * chunkWidth).ToString() + ")";
oldChunk15= "Chunk (" + (oldXco + chunkWidth * -1).ToString() + ", " + oldYco.ToString() + ", " + (oldZco + 2 * chunkWidth).ToString() + ")";
oldChunk16= "Chunk (" + (oldXco + chunkWidth * -1).ToString() + ", " + oldYco.ToString() + ", " + (oldZco + -2 * chunkWidth).ToString() + ")";
oldChunk17= "Chunk (" + oldXco.ToString() + ", " + oldYco.ToString() + ", " + (oldZco + 2 * chunkWidth).ToString() + ")";
oldChunk18= "Chunk (" + oldXco.ToString() + ", " + oldYco.ToString() + ", " + (oldZco + -2 * chunkWidth).ToString() + ")";
oldChunk19= "Chunk (" + (oldXco + chunkWidth).ToString() + ", " + oldYco.ToString() + ", " + (oldZco + 2 * chunkWidth).ToString() + ")";
oldChunk20= "Chunk (" + (oldXco + chunkWidth).ToString() + ", " + oldYco.ToString() + ", " + (oldZco + -2 * chunkWidth).ToString() + ")";
oldChunk21= "Chunk (" + (oldXco + 2 * chunkWidth).ToString() + ", " + oldYco.ToString() + ", " + (oldZco + 2 * chunkWidth).ToString() + ")";
oldChunk22= "Chunk (" + (oldXco + 2 * chunkWidth).ToString() + ", " + oldYco.ToString() + ", " + (oldZco + chunkWidth).ToString() + ")";
oldChunk23= "Chunk (" + (oldXco + 2 * chunkWidth).ToString() + ", " + oldYco.ToString() + ", " + oldZco.ToString() + ")";
oldChunk24= "Chunk (" + (oldXco + 2 * chunkWidth).ToString() + ", " + oldYco.ToString() + ", " + (oldZco * -1).ToString() + ")";
oldChunk25= "Chunk (" + (oldXco + 2 * chunkWidth).ToString() + ", " + oldYco.ToString() + ", " + (oldZco + -2 * chunkWidth).ToString() + ")";
}
}
}
if(oldChunk1.Equals(chunk1)){load1 = false;}
if(oldChunk2.Equals(chunk2)){load2 = false;}
if(oldChunk3.Equals(chunk3)){load3 = false;}
if(oldChunk4.Equals(chunk4)){load4 = false;}
if(oldChunk5.Equals(chunk5)){load5 = false;}
if(oldChunk6.Equals(chunk6)){load6 = false;}
if(oldChunk7.Equals(chunk7)){load7 = false;}
if(oldChunk8.Equals(chunk8)){load8 = false;}
if(oldChunk9.Equals(chunk9)){load9 = false;}
if(oldChunk10.Equals(chunk10)){load10 = false;}
if(oldChunk11.Equals(chunk11)){load11 = false;}
if(oldChunk12.Equals(chunk12)){load12 = false;}
if(oldChunk13.Equals(chunk13)){load13 = false;}
if(oldChunk14.Equals(chunk14)){load14 = false;}
if(oldChunk15.Equals(chunk15)){load15 = false;}
if(oldChunk16.Equals(chunk16)){load16 = false;}
if(oldChunk17.Equals(chunk17)){load17 = false;}
if(oldChunk18.Equals(chunk18)){load18 = false;}
if(oldChunk19.Equals(chunk19)){load19 = false;}
if(oldChunk20.Equals(chunk20)){load20 = false;}
if(oldChunk21.Equals(chunk21)){load21 = false;}
if(oldChunk22.Equals(chunk22)){load22 = false;}
if(oldChunk23.Equals(chunk23)){load23 = false;}
if(oldChunk24.Equals(chunk24)){load24 = false;}
if(oldChunk25.Equals(chunk25)){load25 = false;}
Debug.Log("1" + chunk1 + oldChunk1 + load1);
Debug.Log("2" + chunk2 + oldChunk2 + load2);
Debug.Log("3" + chunk3 + oldChunk3 + load3);
Debug.Log("4" + chunk4 + oldChunk4 + load4);
Debug.Log("5" + chunk5 + oldChunk5 + load5);
Debug.Log("6" + chunk6 + oldChunk6 + load6);
Debug.Log("7" + chunk7 + oldChunk7 + load7);
Debug.Log("8" + chunk8 + oldChunk8 + load8);
Debug.Log("9" + chunk9 + oldChunk9 + load9);
Debug.Log("10" + chunk10 + oldChunk10 + load10);
Debug.Log("11" + chunk11 + oldChunk11 + load11);
Debug.Log("12" + chunk12 + oldChunk12 + load12);
Debug.Log("13" + chunk13 + oldChunk13 + load13);
Debug.Log("14" + chunk14 + oldChunk14 + load14);
Debug.Log("15" + chunk15 + oldChunk15 + load15);
Debug.Log("16" + chunk16 + oldChunk16 + load16);
Debug.Log("17" + chunk17 + oldChunk17 + load17);
Debug.Log("18" + chunk18 + oldChunk18 + load18);
Debug.Log("19" + chunk19 + oldChunk19 + load19);
Debug.Log("20" + chunk20 + oldChunk20 + load20);
Debug.Log("21" + chunk21 + oldChunk21 + load21);
Debug.Log("22" + chunk22 + oldChunk22 + load22);
Debug.Log("23" + chunk23 + oldChunk23 + load23);
Debug.Log("24" + chunk24 + oldChunk24 + load24);
Debug.Log("25" + chunk25 + oldChunk25 + load25);
/*
//V1
if(load1){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco, yco, zco), Quaternion.identity);}
//V2
if(load2){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + chunkWidth, yco, zco + chunkWidth), Quaternion.identity);}
if(load3){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + chunkWidth, yco, zco), Quaternion.identity);}
if(load4){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + chunkWidth, yco, zco * -1), Quaternion.identity);}
if(load5){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + chunkWidth * -1, yco, zco + chunkWidth), Quaternion.identity);}
if(load6){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + chunkWidth * -1, yco, zco), Quaternion.identity);}
if(load7){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + chunkWidth * -1, yco, zco * -1), Quaternion.identity);}
if(load8){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco, yco, zco + chunkWidth), Quaternion.identity);}
if(load9){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco, yco, zco * -1), Quaternion.identity);}
//V3
if(load10){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + chunkWidth * -2, yco, zco + 2 * chunkWidth), Quaternion.identity);}
if(load11){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + chunkWidth * -2, yco, zco + chunkWidth), Quaternion.identity);}
if(load12){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + chunkWidth * -2, yco, zco), Quaternion.identity);}
if(load13){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + chunkWidth * -2, yco, zco * -1), Quaternion.identity);}
if(load14){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + chunkWidth * -2, yco, zco + -2 * chunkWidth), Quaternion.identity);}
if(load15){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + chunkWidth * -1, yco, zco + 2 * chunkWidth), Quaternion.identity);}
if(load16){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + chunkWidth * -1, yco, zco + -2 * chunkWidth), Quaternion.identity);}
if(load17){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco, yco, zco + 2 * chunkWidth), Quaternion.identity);}
if(load18){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco, yco, zco + -2 * chunkWidth), Quaternion.identity);}
if(load19){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + chunkWidth, yco, zco + 2 * chunkWidth), Quaternion.identity);}
if(load20){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + chunkWidth, yco, zco + -2 * chunkWidth), Quaternion.identity);}
if(load21){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + 2 * chunkWidth, yco, zco + 2 * chunkWidth), Quaternion.identity);}
if(load22){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + 2 * chunkWidth, yco, zco + chunkWidth), Quaternion.identity);}
if(load23){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + 2 * chunkWidth, yco, zco), Quaternion.identity);}
if(load24){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + 2 * chunkWidth, yco, zco * -1), Quaternion.identity);}
if(load25){Instantiate(terrains[Random.Range(0,terrains.length)], Vector3(xco + 2 * chunkWidth, yco, zco + -2 * chunkWidth), Quaternion.identity);}
*/
}

Answer 1

http://answers.unity3d.com/questions/177931/tutorial-minecraft-chunks.html
This is a link to the UnityAnswers with a tutorial on how to chunk in Unity3D . You can look ther efor more information ,and hopefully an answer to your quetsion.