koobas.hobune.stream
When generating a procedural voxel mesh, i get something weird.
Okay, so this is my code
#pragma strict
var ChunkPrefab : GameObject;
var World : int[,,];
var WorldSize : Vector3;
var WorldRandomizer : int;
var HeightMultiplier : int;
var LastChunk : GameObject;
var LastMesh : Mesh;
var LastFaces : boolean[];
var LastVerts : Array;
var LastTriangles : Array;
var VertsAmount : int;
function Create () {
WorldRandomizer = Random.Range(0, 999999);
World = new int[WorldSize.x, WorldSize.y, WorldSize.z];
for(var x : float = 0; x < WorldSize.x; x++) {
for(var z : float = 0; z < WorldSize.z; z++) {
World[x, PerlinCalculations(x, z), z] = 1;
}
}
LoadChunk(0, 0);
}
function PerlinCalculations (x : float, z: float) {
return(Mathf.RoundToInt(Mathf.PerlinNoise(WorldRandomizer+x/HeightMultiplier, WorldRandomizer+z/HeightMultiplier)*HeightMultiplier));
}
function LoadChunk(x : double, z : double) {
// 0 top
// 1 front
// 2 bot
// 3 back
// 4 left
// 5 right
LastChunk = GameObject.Instantiate(ChunkPrefab);
LastChunk.transform.position = new Vector3(x*8, z*8);
LastMesh = LastChunk.GetComponent.<MeshFilter>().mesh;
LastVerts = new Array ();
LastTriangles = new Array ();
VertsAmount = 0;
for(var cx : int = 0; cx < 8; cx++) {
for(var cz : int = 0; cz < 8; cz++) {
for(var cy : int = 0; cy < WorldSize.y; cy++) {
if(World[cx + x, cy, cz + z] == 1) {
LastFaces = new boolean[6];
//World edge faces
if(cy == WorldSize.y - 1) {
LastFaces[0] = true;
}
else {
if(World[cx + x, cy + 1, cz + z] == 1) {} else {
LastFaces[0] = true;
}
}
if(cx == 0) {
Debug.Log("Test");
LastFaces[1] = true;
}
else {
if(World[cx + x - 1, cy, cz + z] == 1) {} else {
LastFaces[1] = true;
}
}
if(cy == 0) {
LastFaces[2] = true;
}
else {
if(World[cx + x, cy - 1, cz + z] == 1) {} else {
LastFaces[2] = true;
}
}
if(cx == WorldSize.x - 1) {
LastFaces[3] = true;
}
else {
if(World[cx + x + 1, cy, cz + z] == 1) {} else {
LastFaces[3] = true;
}
}
if(cz == 0) {
LastFaces[4] = true;
}
else {
if(World[cx + x, cy, cz + z - 1] == 1) {} else {
LastFaces[4] = true;
}
}
if(cz == WorldSize.z - 1) {
LastFaces[5] = true;
}
else {
if(World[cx + x, cy, cz + z + 1] == 1) {} else {
LastFaces[5] = true;
}
}
CreateVox(new Vector3(cx + x, cy, cz + z));
}
}
}
}
LastMesh.Clear ();
LastMesh.vertices = LastVerts;
LastMesh.triangles = LastTriangles;
LastMesh.Optimize ();
LastMesh.RecalculateNormals();
}
function CreateVox (Place : Vector3) {
LastVerts.Add(new Vector3(Place.x + 0, Place.y + 0, Place.z + 0));
LastVerts.Add(new Vector3(Place.x + 0, Place.y + 1, Place.z + 0));
LastVerts.Add(new Vector3(Place.x + 1, Place.y + 1, Place.z + 0));
LastVerts.Add(new Vector3(Place.x + 1, Place.y + 0, Place.z + 0));
LastVerts.Add(new Vector3(Place.x + 0, Place.y + 0, Place.z + 1));
LastVerts.Add(new Vector3(Place.x + 0, Place.y + 1, Place.z + 1));
LastVerts.Add(new Vector3(Place.x + 1, Place.y + 1, Place.z + 1));
LastVerts.Add(new Vector3(Place.x + 1, Place.y + 0, Place.z + 1));
if(LastFaces[0]) {
LastTriangles.Add(2+VertsAmount);
LastTriangles.Add(1+VertsAmount);
LastTriangles.Add(5+VertsAmount);
LastTriangles.Add(6+VertsAmount);
LastTriangles.Add(2+VertsAmount);
LastTriangles.Add(5+VertsAmount);
}
if(LastFaces[1]) {
LastTriangles.Add(0+VertsAmount);
LastTriangles.Add(1+VertsAmount);
LastTriangles.Add(2+VertsAmount);
LastTriangles.Add(2+VertsAmount);
LastTriangles.Add(3+VertsAmount);
LastTriangles.Add(0+VertsAmount);
}
if(LastFaces[2]) {
LastTriangles.Add(0+VertsAmount);
LastTriangles.Add(3+VertsAmount);
LastTriangles.Add(4+VertsAmount);
LastTriangles.Add(3+VertsAmount);
LastTriangles.Add(7+VertsAmount);
LastTriangles.Add(4+VertsAmount);
}
if(LastFaces[3]) {
LastTriangles.Add(6+VertsAmount);
LastTriangles.Add(5+VertsAmount);
LastTriangles.Add(7+VertsAmount);
LastTriangles.Add(7+VertsAmount);
LastTriangles.Add(5+VertsAmount);
LastTriangles.Add(4+VertsAmount);
}
if(LastFaces[4]) {
LastTriangles.Add(5+VertsAmount);
LastTriangles.Add(1+VertsAmount);
LastTriangles.Add(4+VertsAmount);
LastTriangles.Add(4+VertsAmount);
LastTriangles.Add(1+VertsAmount);
LastTriangles.Add(0+VertsAmount);
}
if(LastFaces[5]) {
LastTriangles.Add(2+VertsAmount);
LastTriangles.Add(6+VertsAmount);
LastTriangles.Add(3+VertsAmount);
LastTriangles.Add(6+VertsAmount);
LastTriangles.Add(7+VertsAmount);
LastTriangles.Add(3+VertsAmount);
}
VertsAmount+= 8;
}
ChunkPrefab is just a simple GameObject with a MeshFilter and a MeshRenderer. And I'm getting something like this: 
Please, help!
Best Answer
The main problem with the code is that you have flipped x and z axis. For instance if 1 is front face then you should be checking World[cx, cy, cz+1] instead of World[cx + x - 1, cy, cz + z]. Allr 4 x/z checks need to be checked.
The strange shading is because in unity normals are per vertex so a vertex that is on 3 faces will have a normal that is the average of the normal of the faces. To fix the shading you should make 4 vertices per face so 4*6 vertices per cube.
Finally you are making alot of vertices that aren't being used. Since you probably need 4 vertices per face anyways just generate then with the triangles.
Oh, thanks. I don't why i did that stupid mistake. Another question, to unload the chunks should i just destroy the GameObject?
