public VOXCruncher(int begin_x, int end_x, int begin_y, int end_y, int begin_z, int end_z, VOXVisiableFaces _faces, VOXMaterial _material)
{
begin.x = begin_x;
begin.y = begin_y;
begin.z = begin_z;
end.x = end_x;
end.y = end_y;
end.z = end_z;
material = _material;
faces = _faces;
}
public VOXModel CalcVoxelCruncher(VoxData chunk, Color32[] palette)
{
var crunchers = new VOXCruncher[chunk.count];
var faces = new VOXVisiableFaces(true, true, true, true, true, true);
int n = 0;
for (int i = 0; i < chunk.x; ++i)
{
for (int j = 0; j < chunk.y; ++j)
{
for (int k = 0; k < chunk.z; ++k)
{
var m = chunk.voxels[i, j, k];
if (m != int.MaxValue)
{
crunchers[n++] = new VOXCruncher(i, i, j, j, k, k, faces, m);
}
}
}
}
return(new VOXModel(crunchers));
}
public static void CreateCubeMesh16x16(ref Vector3[] vertices, ref Vector3[] normals, ref Vector2[] uv, ref int[] triangles, ref int index, VOXVisiableFaces faces, Vector3 translate, Vector3 scale, uint palette)
{
bool[] visiable = new bool[] { faces.left, faces.right, faces.top, faces.bottom, faces.front, faces.back };
float s = 1.0f / 16.0f;
float a = 0 + 1.0f / 32.0f;
float b = s - 1.0f / 32.0f;
for (int i = 0; i < 6; i++)
{
if (!visiable[i])
{
continue;
}
for (int n = index * 4, k = 0; k < 4; k++, n++)
{
Vector3 v = _positions[i, k] * 0.5f;
v.x *= scale.x;
v.y *= scale.y;
v.z *= scale.z;
v += translate;
float du = (palette % 16) * s;
float dv = (palette / 16) * s;
Vector2 coord;
coord.x = du + (_uvs[i, k].x > 0 ? b : a);
coord.y = dv + (_uvs[i, k].y > 0 ? b : a);
vertices[n] = v;
normals[n] = _normals[i];
uv[n] = coord;
}
for (int j = index * 6, k = 0; k < 6; k++, j++)
{
triangles[j] = index * 4 + _indices[i, k];
}
index++;
}
}
public VOXModel CalcVoxelCruncher(VoxData chunk, Color32[] palette)
{
var crunchers = new List <VOXCruncher>();
var dims = new int[] { chunk.x, chunk.y, chunk.z };
var alloc = System.Math.Max(dims[0], System.Math.Max(dims[1], dims[2]));
var mask = new int[alloc * alloc];
var map = chunk.voxels;
for (var d = 0; d < 3; ++d)
{
var u = (d + 1) % 3;
var v = (d + 2) % 3;
var x = new int[3] {
0, 0, 0
};
var q = new int[3] {
0, 0, 0
};
q[d] = 1;
var faces = new VOXVisiableFaces(false, false, false, false, false, false);
for (x[d] = -1; x[d] < dims[d];)
{
var n = 0;
for (x[v] = 0; x[v] < dims[v]; ++x[v])
{
for (x[u] = 0; x[u] < dims[u]; ++x[u])
{
var a = x[d] >= 0 ? map[x[0], x[1], x[2]] : VOXMaterial.MaxValue;
var b = x[d] < dims[d] - 1 ? map[x[0] + q[0], x[1] + q[1], x[2] + q[2]] : VOXMaterial.MaxValue;
if (a != b)
{
if (a == VOXMaterial.MaxValue)
{
mask[n++] = b;
}
else if (b == VOXMaterial.MaxValue)
{
mask[n++] = -a;
}
else
{
mask[n++] = -b;
}
}
else
{
mask[n++] = VOXMaterial.MaxValue;
}
}
}
++x[d];
n = 0;
for (var j = 0; j < dims[v]; ++j)
{
for (var i = 0; i < dims[u];)
{
var c = mask[n];
if (c == VOXMaterial.MaxValue)
{
++i; ++n;
continue;
}
var w = 1;
var h = 1;
var k = 0;
for (; (i + w) < dims[u] && c == mask[n + w]; ++w)
{
}
var done = false;
for (; (j + h) < dims[v]; ++h)
{
for (k = 0; k < w; ++k)
{
if (c != mask[n + k + h * dims[u]])
{
done = true;
break;
}
}
if (done)
{
break;
}
}
x[u] = i; x[v] = j;
var du = new int[3] {
0, 0, 0
};
var dv = new int[3] {
0, 0, 0
};
du[u] = w;
dv[v] = h;
var v1 = new Vector3(x[0], x[1], x[2]);
var v2 = new Vector3(x[0] + du[0] + dv[0], x[1] + du[1] + dv[1], x[2] + du[2] + dv[2]);
v2.x = System.Math.Max(v2.x - 1, 0);
v2.y = System.Math.Max(v2.y - 1, 0);
v2.z = System.Math.Max(v2.z - 1, 0);
if (c > 0)
{
faces.front = d == 2;
faces.back = false;
faces.left = d == 0;
faces.right = false;
faces.top = false;
faces.bottom = d == 1;
}
else
{
c = -c;
faces.front = false;
faces.back = d == 2;
faces.left = false;
faces.right = d == 0;
faces.top = d == 1;
faces.bottom = false;
}
crunchers.Add(new VOXCruncher((byte)v1.x, (byte)(v2.x), (byte)(v1.y), (byte)(v2.y), (byte)(v1.z), (byte)(v2.z), faces, c));
for (var l = 0; l < h; ++l)
{
for (k = 0; k < w; ++k)
{
mask[n + k + l * dims[u]] = VOXMaterial.MaxValue;
}
}
i += w; n += w;
}
}
}
}
var array = new VOXCruncher[crunchers.Count];
int numbers = 0;
foreach (var it in crunchers)
{
array[numbers++] = it;
}
return(new VOXModel(array));
}
public static bool GetVisiableFaces(VOXMaterial[,,] map, Vector3Int bound, int x, int y, int z, VOXMaterial material, Color32[] palette, out VOXVisiableFaces faces)
{
VOXMaterial[] instanceID = new VOXMaterial[6] {
VOXMaterial.MaxValue, VOXMaterial.MaxValue, VOXMaterial.MaxValue, VOXMaterial.MaxValue, VOXMaterial.MaxValue, VOXMaterial.MaxValue
};
if (x >= 1)
{
instanceID[0] = map[(byte)(x - 1), y, z];
}
if (y >= 1)
{
instanceID[2] = map[x, (byte)(y - 1), z];
}
if (z >= 1)
{
instanceID[4] = map[x, y, (byte)(z - 1)];
}
if (x <= bound.x)
{
instanceID[1] = map[(byte)(x + 1), y, z];
}
if (y <= bound.y)
{
instanceID[3] = map[x, (byte)(y + 1), z];
}
if (z <= bound.z)
{
instanceID[5] = map[x, y, (byte)(z + 1)];
}
var alpha = palette[material].a;
if (alpha < 255)
{
bool f1 = (instanceID[0] == VOXMaterial.MaxValue) ? true : palette[instanceID[0]].a != alpha ? true : false;
bool f2 = (instanceID[1] == VOXMaterial.MaxValue) ? true : palette[instanceID[1]].a != alpha ? true : false;
bool f3 = (instanceID[2] == VOXMaterial.MaxValue) ? true : palette[instanceID[2]].a != alpha ? true : false;
bool f4 = (instanceID[3] == VOXMaterial.MaxValue) ? true : palette[instanceID[3]].a != alpha ? true : false;
bool f5 = (instanceID[4] == VOXMaterial.MaxValue) ? true : palette[instanceID[4]].a != alpha ? true : false;
bool f6 = (instanceID[5] == VOXMaterial.MaxValue) ? true : palette[instanceID[5]].a != alpha ? true : false;
faces.left = f1;
faces.right = f2;
faces.bottom = f3;
faces.top = f4;
faces.front = f5;
faces.back = f6;
}
else
{
bool f1 = (instanceID[0] == VOXMaterial.MaxValue) ? true : palette[instanceID[0]].a < 255 ? true : false;
bool f2 = (instanceID[1] == VOXMaterial.MaxValue) ? true : palette[instanceID[1]].a < 255 ? true : false;
bool f3 = (instanceID[2] == VOXMaterial.MaxValue) ? true : palette[instanceID[2]].a < 255 ? true : false;
bool f4 = (instanceID[3] == VOXMaterial.MaxValue) ? true : palette[instanceID[3]].a < 255 ? true : false;
bool f5 = (instanceID[4] == VOXMaterial.MaxValue) ? true : palette[instanceID[4]].a < 255 ? true : false;
bool f6 = (instanceID[5] == VOXMaterial.MaxValue) ? true : palette[instanceID[5]].a < 255 ? true : false;
faces.left = f1;
faces.right = f2;
faces.bottom = f3;
faces.top = f4;
faces.front = f5;
faces.back = f6;
}
return(faces.left | faces.right | faces.bottom | faces.top | faces.front | faces.back);
}
