public override NodeContent Import(string filename, ContentImporterContext context)
{
VoxelContent voxel = null;
if (Path.GetExtension(filename) == ".vox")
{
VoxImporter voxelImporter = new VoxImporter();
voxel = voxelImporter.ImportVox(filename, context);
}
else
{
throw new InvalidContentException("File type not supported.");
}
voxel.MarkSharedSides();
voxel.RemoveHiddenBlocks();
NodeContent output = VoxelProcess(voxel, context);
return(output);
}
/// <summary>
/// Import a VOX file as Model
/// </summary>
private NodeContent VoxelProcess(VoxelContent voxel, ContentImporterContext context)
{
XYZI[] voxels = voxel.Voxels;
uint[] palette = voxel.Palette;
var scale = voxel.RealSize / voxel.GridSize;
Vector3 centerOffset = new Vector3(1f, 0f, 1f) * (voxel.RealSize / -2f);
var corner000 = new Point3(0, 0, 0);
var corner100 = new Point3(1, 0, 0);
var corner010 = new Point3(0, 1, 0);
var corner110 = new Point3(1, 1, 0);
var corner001 = new Point3(0, 0, 1);
var corner101 = new Point3(1, 0, 1);
var corner011 = new Point3(0, 1, 1);
var corner111 = new Point3(1, 1, 1);
var Forward = Vector3.Forward;
var Backward = Vector3.Backward;
var Left = Vector3.Left;
var Right = Vector3.Right;
var Up = Vector3.Up;
var Down = Vector3.Down;
for (int i = 0; i < voxels.Length; i++)
{
var pt000 = voxels[i].Point.Add(ref corner000);
var pt100 = voxels[i].Point.Add(ref corner100);
var pt010 = voxels[i].Point.Add(ref corner010);
var pt110 = voxels[i].Point.Add(ref corner110);
var pt001 = voxels[i].Point.Add(ref corner001);
var pt101 = voxels[i].Point.Add(ref corner101);
var pt011 = voxels[i].Point.Add(ref corner011);
var pt111 = voxels[i].Point.Add(ref corner111);
// back
var p0 = pt000.ToVector3();
var p1 = pt100.ToVector3();
var p2 = pt010.ToVector3();
var p3 = pt110.ToVector3();
// front
var p4 = pt001.ToVector3();
var p5 = pt101.ToVector3();
var p6 = pt011.ToVector3();
var p7 = pt111.ToVector3();
Vector3.Multiply(ref p0, ref scale, out p0); Vector3.Add(ref p0, ref centerOffset, out p0);
Vector3.Multiply(ref p1, ref scale, out p1); Vector3.Add(ref p1, ref centerOffset, out p1);
Vector3.Multiply(ref p2, ref scale, out p2); Vector3.Add(ref p2, ref centerOffset, out p2);
Vector3.Multiply(ref p3, ref scale, out p3); Vector3.Add(ref p3, ref centerOffset, out p3);
Vector3.Multiply(ref p4, ref scale, out p4); Vector3.Add(ref p4, ref centerOffset, out p4);
Vector3.Multiply(ref p5, ref scale, out p5); Vector3.Add(ref p5, ref centerOffset, out p5);
Vector3.Multiply(ref p6, ref scale, out p6); Vector3.Add(ref p6, ref centerOffset, out p6);
Vector3.Multiply(ref p7, ref scale, out p7); Vector3.Add(ref p7, ref centerOffset, out p7);
vertex.Color.PackedValue = palette[voxels[i].ColorIndex];
if ((voxels[i].SharedSides & Sides.Forward) == 0)
{
vertex.Normal = Forward;
AddVertex(ref p1);
AddVertex(ref p3);
AddVertex(ref p0);
AddVertex(ref p0);
AddVertex(ref p3);
AddVertex(ref p2);
}
if ((voxels[i].SharedSides & Sides.Backward) == 0)
{
vertex.Normal = Backward;
AddVertex(ref p4);
AddVertex(ref p6);
AddVertex(ref p5);
AddVertex(ref p5);
AddVertex(ref p6);
AddVertex(ref p7);
}
if ((voxels[i].SharedSides & Sides.Left) == 0)
{
vertex.Normal = Left;
AddVertex(ref p2);
AddVertex(ref p6);
AddVertex(ref p0);
AddVertex(ref p0);
AddVertex(ref p6);
AddVertex(ref p4);
}
if ((voxels[i].SharedSides & Sides.Right) == 0)
{
vertex.Normal = Right;
AddVertex(ref p1);
AddVertex(ref p5);
AddVertex(ref p3);
AddVertex(ref p3);
AddVertex(ref p5);
AddVertex(ref p7);
}
if ((voxels[i].SharedSides & Sides.Up) == 0)
{
vertex.Normal = Up;
AddVertex(ref p7);
AddVertex(ref p6);
AddVertex(ref p3);
AddVertex(ref p3);
AddVertex(ref p6);
AddVertex(ref p2);
}
if ((voxels[i].SharedSides & Sides.Down) == 0)
{
vertex.Normal = Down;
AddVertex(ref p5);
AddVertex(ref p1);
AddVertex(ref p4);
AddVertex(ref p4);
AddVertex(ref p1);
AddVertex(ref p0);
}
}
MeshContent mesh = new MeshContent();
mesh.Name = "voxel";
for (int pi = 0; pi < this.vertices.Count; pi++)
{
mesh.Positions.Add(this.vertices[pi].Position);
}
var geom = new GeometryContent();
mesh.Geometry.Add(geom);
BasicMaterialContent material = new BasicMaterialContent();
geom.Material = material;
for (int pi = 0; pi < this.vertices.Count; pi++)
{
geom.Vertices.Add(pi);
}
for (int ii = 0; ii < this.indices.Count; ii++)
{
geom.Indices.Add(this.indices[ii]);
}
List <Vector3> normals = new List <Vector3>();
List <Color> colors = new List <Color>();
for (int vi = 0; vi < this.vertices.Count; vi++)
{
var vertex = vertices[vi];
normals.Add(vertex.Normal);
colors.Add(vertex.Color);
}
geom.Vertices.Channels.Add <Vector3>(VertexChannelNames.Normal(0), normals);
geom.Vertices.Channels.Add <Color>(VertexChannelNames.Color(0), colors);
return(mesh);
}
private VoxelContent ImportVox(BinaryReader reader, ContentIdentity contentIdentity, ContentImporterContext context)
{
VoxelContent output = null;
var header = new VoxHeader(reader);
var main = new Chunk(reader);
if (main.ChunkId != Chunk.MAIN)
{
throw new InvalidContentException("MAIN was expected");
}
var chunk = new Chunk(reader);
if (chunk.ChunkId == Chunk.PACK)
{
throw new InvalidContentException("PACK is not supported");
}
var chunkSIZE = chunk;
if (chunkSIZE.ChunkId != Chunk.SIZE)
{
throw new InvalidContentException("SIZE was expected");
}
int sizeX = reader.ReadInt32();
int sizeZ = reader.ReadInt32();
int sizeY = reader.ReadInt32();
var chunkXYZI = new Chunk(reader);
if (chunkXYZI.ChunkId != Chunk.XYZI)
{
throw new InvalidContentException("XYZI was expected");
}
var numVoxels = reader.ReadInt32();
XYZI[] voxels = new XYZI[numVoxels];
for (var i = 0; i < numVoxels; i++)
{
var x = reader.ReadByte();
var z = reader.ReadByte();
var y = reader.ReadByte();
var ColorIndex = reader.ReadByte();
z = (byte)(sizeZ - 1 - z);
voxels[i].Point = new Point3(x, y, z);
voxels[i].ColorIndex = ColorIndex;
}
uint[] palette = default_palette;
if (reader.BaseStream.Position < reader.BaseStream.Length)
{
chunk = new Chunk(reader);
if (chunk.ChunkId == Chunk.RGBA)
{
palette = new UInt32[256];
// color [0-254] are mapped to palette index [1-255]
for (int i = 1; i < 256; i++)
{
palette[i] = reader.ReadUInt32();
}
// the last color is not mapped
reader.ReadUInt32();
}
}
output = new VoxelContent()
{
GridSize = new Vector3(sizeX, sizeY, sizeZ),
Voxels = voxels,
Palette = palette,
};
return(output);
}
