public static Mesh Mesh(Chunk chunk, Chunks chunks, int tileRows, float tileSize, List <Vertice> verticeList, bool transparent)
{
var m = new Mesh();
var vertices = new List <Vector3> ();
var uvs = new List <Vector2> ();
var uv2s = new List <Vector2> ();
var triangles = new List <int> ();
var normals = new List <Vector3> ();
var coord = new [] { 0, 0, 0 };
var offset = new Vector3(0.5f, 0.5f, 0.5f);
int index;
int textureId;
int f;
Vector2 uvOffset;
for (var d = 0; d < 3; d++)
{
var u = (d + 1) % 3;
var v = (d + 2) % 3;
var normalCoord = new [] { 0, 0, 0 };
normalCoord [d] += 1;
var normal = new Vector3(normalCoord [0], normalCoord [1], normalCoord [2]);
normalCoord [d] *= -1;
var normal2 = new Vector3(normalCoord [0], normalCoord [1], normalCoord [2]);
for (var x = -1; x < chunk.size; x++)
{
for (var y = 0; y < chunk.size; y++)
{
for (var z = 0; z < chunk.size; z++)
{
coord [d] = x;
coord [u] = y;
coord [v] = z;
var a = (x == -1)
? chunks.Get(coord [0] + chunk.origin [0], coord [1] + chunk.origin [1], coord [2] + chunk.origin [2])
: chunk.Get(coord [0], coord [1], coord [2]);
coord [d] += 1;
var b = coord [d] == chunk.size
? chunks.Get(coord [0] + chunk.origin [0], coord [1] + chunk.origin [1], coord [2] + chunk.origin [2])
: chunk.Get(coord [0], coord [1], coord [2]);
if (x == -1 && b == null)
{
continue;
}
else if (coord [d] == chunk.size && a == null)
{
continue;
}
var front = false;
var back = false;
if (transparent)
{
front = a != null && a.transparent && b == null;
back = b != null && b.transparent && a == null;
}
else
{
front = a != null && !a.transparent && (b == null || b.transparent);
back = b != null && !b.transparent && (a == null || a.transparent);
}
if (!front && !back)
{
continue;
}
var v1 = new Vector3(coord[0], coord[1], coord[2]) - offset;
coord [u] += 1;
var v2 = new Vector3(coord[0], coord[1], coord[2]) - offset;
coord [v] += 1;
var v3 = new Vector3(coord[0], coord[1], coord[2]) - offset;
coord [u] -= 1;
var v4 = new Vector3(coord[0], coord[1], coord[2]) - offset;
index = vertices.Count;
var n = front ? normal : normal2;
normals.Add(n);
normals.Add(n);
normals.Add(n);
normals.Add(n);
vertices.Add(v1);
vertices.Add(v2);
vertices.Add(v3);
vertices.Add(v4);
f = d * 2 + (front ? 1 : 0);
var voxel = front ? a : b;
textureId = voxel.textureIds[f];
uvOffset = Tilesets.GetOffset(textureId, tileRows);
var up = voxel.up;
var upD = (int)(up / 2);
Vector2 uv1, uv2, uv3, uv4;
if (u * 2 == up)
{
uv4 = new Vector2(uvOffset.x, uvOffset.y);
uv1 = new Vector2(uvOffset.x + tileSize, uvOffset.y);
uv2 = new Vector2(uvOffset.x + tileSize, uvOffset.y - tileSize);
uv3 = new Vector2(uvOffset.x, uvOffset.y - tileSize);
}
else if (u * 2 + 1 == up)
{
uv2 = new Vector2(uvOffset.x, uvOffset.y);
uv3 = new Vector2(uvOffset.x + tileSize, uvOffset.y);
uv4 = new Vector2(uvOffset.x + tileSize, uvOffset.y - tileSize);
uv1 = new Vector2(uvOffset.x, uvOffset.y - tileSize);
}
else if (v * 2 == up)
{
uv1 = new Vector2(uvOffset.x, uvOffset.y);
uv2 = new Vector2(uvOffset.x + tileSize, uvOffset.y);
uv3 = new Vector2(uvOffset.x + tileSize, uvOffset.y - tileSize);
uv4 = new Vector2(uvOffset.x, uvOffset.y - tileSize);
}
else if (v * 2 + 1 == up)
{
uv1 = new Vector2(uvOffset.x, uvOffset.y - tileSize);
uv2 = new Vector2(uvOffset.x + tileSize, uvOffset.y - tileSize);
uv3 = new Vector2(uvOffset.x + tileSize, uvOffset.y);
uv4 = new Vector2(uvOffset.x, uvOffset.y);
}
else
{
uv1 = new Vector2(uvOffset.x, uvOffset.y);
uv2 = new Vector2(uvOffset.x + tileSize, uvOffset.y);
uv3 = new Vector2(uvOffset.x + tileSize, uvOffset.y - tileSize);
uv4 = new Vector2(uvOffset.x, uvOffset.y - tileSize);
}
uvs.Add(uv1);
uvs.Add(uv2);
uvs.Add(uv3);
uvs.Add(uv4);
if (verticeList != null)
{
var c = front ? a.coord : b.coord;
verticeList.Add(
new Vertice(v1, index, f, c, new Vector2(0, 0), chunk.id));
verticeList.Add(
new Vertice(v2, index + 1, f, c, new Vector2(1, 0), chunk.id));
verticeList.Add(
new Vertice(v3, index + 2, f, c, new Vector2(1, 1), chunk.id));
verticeList.Add(
new Vertice(v4, index + 3, f, c, new Vector2(0, 1), chunk.id));
}
if (front)
{
triangles.AddRange(new [] { 0 + index, 1 + index, 2 + index, 0 + index, 2 + index, 3 + index });
}
else
{
triangles.AddRange(new [] { 0 + index, 2 + index, 1 + index, 0 + index, 3 + index, 2 + index });
}
var mCoord = new MCoord(front ? x + 1 : x, y - 1, z - 1, d);
var s00 = getV(chunks, mCoord.add(0, 0, 0), chunk.origin);
var s01 = getV(chunks, mCoord.add(0, 1, 0), chunk.origin);
var s02 = getV(chunks, mCoord.add(0, 2, 0), chunk.origin);
var s10 = getV(chunks, mCoord.add(0, 0, 1), chunk.origin);
// var s11 = getV(chunks, mCoord.add (0, 1, 1), chunk.origin);
var s12 = getV(chunks, mCoord.add(0, 2, 1), chunk.origin);
var s20 = getV(chunks, mCoord.add(0, 0, 2), chunk.origin);
var s21 = getV(chunks, mCoord.add(0, 1, 2), chunk.origin);
var s22 = getV(chunks, mCoord.add(0, 2, 2), chunk.origin);
uv2s.Add(new Vector2(vertexAO(s10, s01, s00), 0));
uv2s.Add(new Vector2(vertexAO(s01, s12, s02), 0));
uv2s.Add(new Vector2(vertexAO(s12, s21, s22), 0));
uv2s.Add(new Vector2(vertexAO(s21, s10, s20), 0));
}
}
}
}
m.vertices = vertices.ToArray();
m.uv = uvs.ToArray();
m.uv2 = uv2s.ToArray();
m.triangles = triangles.ToArray();
m.normals = normals.ToArray();
return(m);
}
private static int getV(Chunks chunks, MCoord mCoord, int[] origin)
{
var vector = mCoord.vector;
return(chunks.Get(vector.x + origin[0], vector.y + origin[1], vector.z + origin[2]) != null ? 1 : 0);
}