public void GenerateMesh()
{
VoxelMeshGen meshGen = new VoxelMeshGen();
meshGen.width = width;
meshGen.height = height;
meshGen.depth = depth;
meshGen.voxelSize = voxelSize;
meshGen.palette = palette.colors;
meshGen.blocks = GetBlocks3DArray();
meshGen.blocksFront = null; //new int[meshGen.width, meshGen.height, meshGen.depth];
meshGen.blocksBack = null; //new int[meshGen.width, meshGen.height, meshGen.depth];
meshGen.blocksTop = null; //new int[meshGen.width, meshGen.height, meshGen.depth];
meshGen.blocksBottom = null; //new int[meshGen.width, meshGen.height, meshGen.depth];
meshGen.blocksRight = null; //new int[meshGen.width, meshGen.height, meshGen.depth];
meshGen.blocksLeft = null; //new int[meshGen.width, meshGen.height, meshGen.depth];
MeshBuilder.Generate(ref meshGen);
mesh = meshGen.outMesh;
}
static bool IsBlockHovered(VoxelMeshGen meshGen, int x, int y, int z, Direction direction)
{
bool hovered = false;
switch (direction)
{
case Direction.Front: {
if (z + 1 < meshGen.depth)
{
hovered = meshGen.blocks[x, y, z + 1] != 0;
}
else if (z + 1 >= meshGen.depth)
{
if (meshGen.blocksFront != null)
{
hovered = meshGen.blocksFront[x, y, 0] != 0;
}
}
} break;
case Direction.Back: {
if (z - 1 >= 0)
{
hovered = meshGen.blocks[x, y, z - 1] != 0;
}
else if (z - 1 < 0)
{
if (meshGen.blocksBack != null)
{
hovered = meshGen.blocksBack[x, y, meshGen.depth - 1] != 0;
}
}
} break;
case Direction.Top: {
if (y + 1 < meshGen.height)
{
hovered = meshGen.blocks[x, y + 1, z] != 0;
}
else if (y + 1 >= meshGen.height)
{
if (meshGen.blocksTop != null)
{
hovered = meshGen.blocksTop[x, 0, z] != 0;
}
}
} break;
case Direction.Bottom: {
if (y - 1 >= 0)
{
hovered = meshGen.blocks[x, y - 1, z] != 0;
}
else if (y - 1 < 0)
{
if (meshGen.blocksBottom != null)
{
hovered = meshGen.blocksBottom[x, meshGen.height - 1, z] != 0;
}
}
} break;
case Direction.Right: {
if (x + 1 < meshGen.width)
{
hovered = meshGen.blocks[x + 1, y, z] != 0;
}
else if (x + 1 >= meshGen.width)
{
if (meshGen.blocksRight != null)
{
hovered = meshGen.blocksRight[0, y, z] != 0;
}
}
} break;
case Direction.Left: {
if (x - 1 >= 0)
{
hovered = meshGen.blocks[x - 1, y, z] != 0;
}
else if (x - 1 < 0)
{
if (meshGen.blocksLeft != null)
{
hovered = meshGen.blocksLeft[meshGen.width - 1, y, z] != 0;
}
}
} break;
}
return(hovered);
}
public static void Generate(ref VoxelMeshGen meshGen)
{
if (meshGen.voxelSize == 0.0f)
{
Debug.LogError("Wrong voxel size. It's cannot be 0");
return;
}
List <Vector3> positions = new List <Vector3>();
List <Vector3> normals = new List <Vector3>();
List <Color> colors = new List <Color>();
List <int> indices = new List <int>();
int[,,] blocksUsed = new int[meshGen.width, meshGen.height, meshGen.depth];
float voxelSize = meshGen.voxelSize;
float voxelHalfSize = meshGen.voxelSize / 2.0f;
for (int x = 0; x < meshGen.width; ++x)
{
for (int y = 0; y < meshGen.height; ++y)
{
for (int z = 0; z < meshGen.depth; ++z)
{
int currentBlock = meshGen.blocks[x, y, z];
if (currentBlock <= 0)
{
continue;
}
Color blockColor = meshGen.palette[currentBlock - 1];
if (!IsBlockHovered(meshGen, x, y, z, Direction.Front))
{
if ((blocksUsed[x, y, z] & (int)Direction.Front) == 0)
{
int numBlocksY = 0;
int numBlocksX = 0;
for (int _y = y; _y < meshGen.height; ++_y)
{
bool failed = false;
for (int _x = x; _x < meshGen.width; ++_x)
{
if (_y == y)
{
if (meshGen.blocks[_x, _y, z] == currentBlock && !IsBlockHovered(meshGen, _x, _y, z, Direction.Front))
{
++numBlocksX;
}
else
{
break;
}
}
else
{
if (meshGen.blocks[_x, _y, z] != currentBlock || IsBlockHovered(meshGen, _x, _y, z, Direction.Front))
{
failed = true;
break;
}
}
}
if (failed)
{
break;
}
++numBlocksY;
}
for (int _x = x; _x < x + numBlocksX; ++_x)
{
for (int _y = y; _y < y + numBlocksY; ++_y)
{
blocksUsed[_x, _y, z] |= (int)Direction.Front;
}
}
// geometry
positions.Add(new Vector3((x * voxelSize) - voxelHalfSize, (y * voxelSize) - voxelHalfSize, (z * voxelSize) + voxelHalfSize));
positions.Add(new Vector3((x * voxelSize) - voxelHalfSize, (y * voxelSize) + voxelHalfSize + (voxelSize * numBlocksY - voxelSize), (z * voxelSize) + voxelHalfSize));
positions.Add(new Vector3((x * voxelSize) + voxelHalfSize + (numBlocksX * voxelSize - voxelSize), (y * voxelSize) + voxelHalfSize + (voxelSize * numBlocksY - voxelSize), (z * voxelSize) + voxelHalfSize));
positions.Add(new Vector3((x * voxelSize) + voxelHalfSize + (numBlocksX * voxelSize - voxelSize), (y * voxelSize) - voxelHalfSize, (z * voxelSize) + voxelHalfSize));
normals.Add(new Vector3(0, 0, 1));
normals.Add(new Vector3(0, 0, 1));
normals.Add(new Vector3(0, 0, 1));
normals.Add(new Vector3(0, 0, 1));
colors.Add(blockColor);
colors.Add(blockColor);
colors.Add(blockColor);
colors.Add(blockColor);
int startVertexIndex = positions.Count - 4;
indices.Add(startVertexIndex + 0);
indices.Add(startVertexIndex + 2);
indices.Add(startVertexIndex + 1);
indices.Add(startVertexIndex + 3);
indices.Add(startVertexIndex + 2);
indices.Add(startVertexIndex + 0);
}
}
if (!IsBlockHovered(meshGen, x, y, z, Direction.Back))
{
if ((blocksUsed[x, y, z] & (int)Direction.Back) == 0)
{
int numBlocksY = 0;
int numBlocksX = 0;
for (int _y = y; _y < meshGen.height; ++_y)
{
bool failed = false;
for (int _x = x; _x < meshGen.width; ++_x)
{
if (_y == y)
{
if (meshGen.blocks[_x, _y, z] == currentBlock && !IsBlockHovered(meshGen, _x, _y, z, Direction.Back))
{
++numBlocksX;
}
else
{
break;
}
}
else
{
if (meshGen.blocks[_x, _y, z] != currentBlock || IsBlockHovered(meshGen, _x, _y, z, Direction.Back))
{
failed = true;
break;
}
}
}
if (failed)
{
break;
}
++numBlocksY;
}
for (int _x = x; _x < x + numBlocksX; ++_x)
{
for (int _y = y; _y < y + numBlocksY; ++_y)
{
blocksUsed[_x, _y, z] |= (int)Direction.Back;
}
}
// geometry
positions.Add(new Vector3((x * voxelSize) - voxelHalfSize, (y * voxelSize) - voxelHalfSize, (z * voxelSize) - voxelHalfSize));
positions.Add(new Vector3((x * voxelSize) - voxelHalfSize, (y * voxelSize) + voxelHalfSize + (voxelSize * numBlocksY - voxelSize), (z * voxelSize) - voxelHalfSize));
positions.Add(new Vector3((x * voxelSize) + voxelHalfSize + (numBlocksX * voxelSize - voxelSize), (y * voxelSize) + voxelHalfSize + (voxelSize * numBlocksY - voxelSize), (z * voxelSize) - voxelHalfSize));
positions.Add(new Vector3((x * voxelSize) + voxelHalfSize + (numBlocksX * voxelSize - voxelSize), (y * voxelSize) - voxelHalfSize, (z * voxelSize) - voxelHalfSize));
normals.Add(new Vector3(0, 0, -1));
normals.Add(new Vector3(0, 0, -1));
normals.Add(new Vector3(0, 0, -1));
normals.Add(new Vector3(0, 0, -1));
colors.Add(blockColor);
colors.Add(blockColor);
colors.Add(blockColor);
colors.Add(blockColor);
int startVertexIndex = positions.Count - 4;
indices.Add(startVertexIndex + 0);
indices.Add(startVertexIndex + 1);
indices.Add(startVertexIndex + 2);
indices.Add(startVertexIndex + 2);
indices.Add(startVertexIndex + 3);
indices.Add(startVertexIndex + 0);
}
}
if (!IsBlockHovered(meshGen, x, y, z, Direction.Top))
{
if ((blocksUsed[x, y, z] & (int)Direction.Top) == 0)
{
int numBlocksX = 0;
int numBlocksZ = 0;
for (int _x = x; _x < meshGen.width; ++_x)
{
bool failed = false;
for (int _z = z; _z < meshGen.depth; ++_z)
{
if (_x == x)
{
if (meshGen.blocks[_x, y, _z] == currentBlock && !IsBlockHovered(meshGen, _x, y, _z, Direction.Top))
{
++numBlocksZ;
}
else
{
break;
}
}
else
{
if (meshGen.blocks[_x, y, _z] != currentBlock || IsBlockHovered(meshGen, _x, y, _z, Direction.Top))
{
failed = true;
break;
}
}
}
if (failed)
{
break;
}
++numBlocksX;
}
for (int _x = x; _x < x + numBlocksX; ++_x)
{
for (int _z = z; _z < z + numBlocksZ; ++_z)
{
blocksUsed[_x, y, _z] |= (int)Direction.Top;
}
}
// geometry
positions.Add(new Vector3((x * voxelSize) - voxelHalfSize, (y * voxelSize) + voxelHalfSize, (z * voxelSize) - voxelHalfSize));
positions.Add(new Vector3((x * voxelSize) - voxelHalfSize, (y * voxelSize) + voxelHalfSize, (z * voxelSize) + voxelHalfSize + (numBlocksZ * voxelSize - voxelSize)));
positions.Add(new Vector3((x * voxelSize) + voxelHalfSize + (numBlocksX * voxelSize - voxelSize), (y * voxelSize) + voxelHalfSize, (z * voxelSize) + voxelHalfSize + (numBlocksZ * voxelSize - voxelSize)));
positions.Add(new Vector3((x * voxelSize) + voxelHalfSize + (numBlocksX * voxelSize - voxelSize), (y * voxelSize) + voxelHalfSize, (z * voxelSize) - voxelHalfSize));
normals.Add(new Vector3(0, 1, 0));
normals.Add(new Vector3(0, 1, 0));
normals.Add(new Vector3(0, 1, 0));
normals.Add(new Vector3(0, 1, 0));
colors.Add(blockColor);
colors.Add(blockColor);
colors.Add(blockColor);
colors.Add(blockColor);
int startVertexIndex = positions.Count - 4;
indices.Add(startVertexIndex + 0);
indices.Add(startVertexIndex + 1);
indices.Add(startVertexIndex + 2);
indices.Add(startVertexIndex + 2);
indices.Add(startVertexIndex + 3);
indices.Add(startVertexIndex + 0);
}
}
if (!IsBlockHovered(meshGen, x, y, z, Direction.Bottom))
{
if ((blocksUsed[x, y, z] & (int)Direction.Bottom) == 0)
{
int numBlocksX = 0;
int numBlocksZ = 0;
for (int _x = x; _x < meshGen.width; ++_x)
{
bool failed = false;
for (int _z = z; _z < meshGen.depth; ++_z)
{
if (_x == x)
{
if (meshGen.blocks[_x, y, _z] == currentBlock && !IsBlockHovered(meshGen, _x, y, _z, Direction.Bottom))
{
++numBlocksZ;
}
else
{
break;
}
}
else
{
if (meshGen.blocks[_x, y, _z] != currentBlock || IsBlockHovered(meshGen, _x, y, _z, Direction.Bottom))
{
failed = true;
break;
}
}
}
if (failed)
{
break;
}
++numBlocksX;
}
for (int _x = x; _x < x + numBlocksX; ++_x)
{
for (int _z = z; _z < z + numBlocksZ; ++_z)
{
blocksUsed[_x, y, _z] |= (int)Direction.Bottom;
}
}
// geometry
positions.Add(new Vector3((x * voxelSize) - voxelHalfSize, (y * voxelSize) - voxelHalfSize, (z * voxelSize) - voxelHalfSize));
positions.Add(new Vector3((x * voxelSize) - voxelHalfSize, (y * voxelSize) - voxelHalfSize, (z * voxelSize) + voxelHalfSize + (numBlocksZ * voxelSize - voxelSize)));
positions.Add(new Vector3((x * voxelSize) + voxelHalfSize + (numBlocksX * voxelSize - voxelSize), (y * voxelSize) - voxelHalfSize, (z * voxelSize) + voxelHalfSize + (numBlocksZ * voxelSize - voxelSize)));
positions.Add(new Vector3((x * voxelSize) + voxelHalfSize + (numBlocksX * voxelSize - voxelSize), (y * voxelSize) - voxelHalfSize, (z * voxelSize) - voxelHalfSize));
normals.Add(new Vector3(0, -1, 0));
normals.Add(new Vector3(0, -1, 0));
normals.Add(new Vector3(0, -1, 0));
normals.Add(new Vector3(0, -1, 0));
colors.Add(blockColor);
colors.Add(blockColor);
colors.Add(blockColor);
colors.Add(blockColor);
int startVertexIndex = positions.Count - 4;
indices.Add(startVertexIndex + 0);
indices.Add(startVertexIndex + 2);
indices.Add(startVertexIndex + 1);
indices.Add(startVertexIndex + 3);
indices.Add(startVertexIndex + 2);
indices.Add(startVertexIndex + 0);
}
}
if (!IsBlockHovered(meshGen, x, y, z, Direction.Right))
{
if ((blocksUsed[x, y, z] & (int)Direction.Right) == 0)
{
int numBlocksY = 0;
int numBlocksZ = 0;
for (int _y = y; _y < meshGen.height; ++_y)
{
bool failed = false;
for (int _z = z; _z < meshGen.depth; ++_z)
{
if (_y == y)
{
if (meshGen.blocks[x, _y, _z] == currentBlock && !IsBlockHovered(meshGen, x, _y, _z, Direction.Right))
{
++numBlocksZ;
}
else
{
break;
}
}
else
{
if (meshGen.blocks[x, _y, _z] != currentBlock || IsBlockHovered(meshGen, x, _y, _z, Direction.Right))
{
failed = true;
break;
}
}
}
if (failed)
{
break;
}
++numBlocksY;
}
for (int _y = y; _y < y + numBlocksY; ++_y)
{
for (int _z = z; _z < z + numBlocksZ; ++_z)
{
blocksUsed[x, _y, _z] |= (int)Direction.Right;
}
}
// geometry
positions.Add(new Vector3((x * voxelSize) + voxelHalfSize, (y * voxelSize) - voxelHalfSize, (z * voxelSize) - voxelHalfSize));
positions.Add(new Vector3((x * voxelSize) + voxelHalfSize, (y * voxelSize) - voxelHalfSize, (z * voxelSize) + voxelHalfSize + (numBlocksZ * voxelSize - voxelSize)));
positions.Add(new Vector3((x * voxelSize) + voxelHalfSize, (y * voxelSize) + voxelHalfSize + (numBlocksY * voxelSize - voxelSize), (z * voxelSize) + voxelHalfSize + (numBlocksZ * voxelSize - voxelSize)));
positions.Add(new Vector3((x * voxelSize) + voxelHalfSize, (y * voxelSize) + voxelHalfSize + (numBlocksY * voxelSize - voxelSize), (z * voxelSize) - voxelHalfSize));
normals.Add(new Vector3(1, 0, 0));
normals.Add(new Vector3(1, 0, 0));
normals.Add(new Vector3(1, 0, 0));
normals.Add(new Vector3(1, 0, 0));
colors.Add(blockColor);
colors.Add(blockColor);
colors.Add(blockColor);
colors.Add(blockColor);
int startVertexIndex = positions.Count - 4;
indices.Add(startVertexIndex + 0);
indices.Add(startVertexIndex + 2);
indices.Add(startVertexIndex + 1);
indices.Add(startVertexIndex + 3);
indices.Add(startVertexIndex + 2);
indices.Add(startVertexIndex + 0);
}
}
if (!IsBlockHovered(meshGen, x, y, z, Direction.Left))
{
if ((blocksUsed[x, y, z] & (int)Direction.Left) == 0)
{
int numBlocksY = 0;
int numBlocksZ = 0;
for (int _y = y; _y < meshGen.height; ++_y)
{
bool failed = false;
for (int _z = z; _z < meshGen.depth; ++_z)
{
if (_y == y)
{
if (meshGen.blocks[x, _y, _z] == currentBlock && !IsBlockHovered(meshGen, x, _y, _z, Direction.Left))
{
++numBlocksZ;
}
else
{
break;
}
}
else
{
if (meshGen.blocks[x, _y, _z] != currentBlock || IsBlockHovered(meshGen, x, _y, _z, Direction.Left))
{
failed = true;
break;
}
}
}
if (failed)
{
break;
}
++numBlocksY;
}
for (int _y = y; _y < y + numBlocksY; ++_y)
{
for (int _z = z; _z < z + numBlocksZ; ++_z)
{
blocksUsed[x, _y, _z] |= (int)Direction.Left;
}
}
// geometry
positions.Add(new Vector3((x * voxelSize) - voxelHalfSize, (y * voxelSize) - voxelHalfSize, (z * voxelSize) - voxelHalfSize));
positions.Add(new Vector3((x * voxelSize) - voxelHalfSize, (y * voxelSize) - voxelHalfSize, (z * voxelSize) + voxelHalfSize + (numBlocksZ * voxelSize - voxelSize)));
positions.Add(new Vector3((x * voxelSize) - voxelHalfSize, (y * voxelSize) + voxelHalfSize + (numBlocksY * voxelSize - voxelSize), (z * voxelSize) + voxelHalfSize + (numBlocksZ * voxelSize - voxelSize)));
positions.Add(new Vector3((x * voxelSize) - voxelHalfSize, (y * voxelSize) + voxelHalfSize + (numBlocksY * voxelSize - voxelSize), (z * voxelSize) - voxelHalfSize));
normals.Add(new Vector3(-1, 0, 0));
normals.Add(new Vector3(-1, 0, 0));
normals.Add(new Vector3(-1, 0, 0));
normals.Add(new Vector3(-1, 0, 0));
colors.Add(blockColor);
colors.Add(blockColor);
colors.Add(blockColor);
colors.Add(blockColor);
int startVertexIndex = positions.Count - 4;
indices.Add(startVertexIndex + 0);
indices.Add(startVertexIndex + 1);
indices.Add(startVertexIndex + 2);
indices.Add(startVertexIndex + 2);
indices.Add(startVertexIndex + 3);
indices.Add(startVertexIndex + 0);
}
}
}
}
}
for (int i = 0; i < positions.Count; ++i)
{
positions[i] += new Vector3(voxelHalfSize, voxelHalfSize, voxelHalfSize);
}
Mesh mesh = new Mesh();
mesh.SetVertices(positions);
mesh.SetNormals(normals);
mesh.SetColors(colors);
mesh.SetIndices(indices.ToArray(), MeshTopology.Triangles, 0);
mesh.UploadMeshData(true);
meshGen.outMesh = mesh;
}
