public static string WriteB3dm(string path, B3dm b3dm)
{
var header_length = 28;
b3dm.B3dmHeader.ByteLength = b3dm.GlbData.Length + header_length + b3dm.FeatureTableJson.Length + b3dm.BatchTableJson.Length + b3dm.BatchTableBinary.Length + b3dm.FeatureTableBinary.Length;
b3dm.B3dmHeader.FeatureTableJsonByteLength = b3dm.FeatureTableJson.Length;
b3dm.B3dmHeader.BatchTableJsonByteLength = b3dm.BatchTableJson.Length;
b3dm.B3dmHeader.FeatureTableBinaryByteLength = b3dm.FeatureTableBinary.Length;
b3dm.B3dmHeader.BatchTableBinaryByteLength = b3dm.BatchTableBinary.Length;
var fileStream = File.Open(path, FileMode.Create);
var binaryWriter = new BinaryWriter(fileStream);
binaryWriter.Write(b3dm.B3dmHeader.AsBinary());
binaryWriter.Write(Encoding.UTF8.GetBytes(b3dm.FeatureTableJson));
if (b3dm.FeatureTableBinary != null)
{
binaryWriter.Write(b3dm.FeatureTableBinary);
}
binaryWriter.Write(Encoding.UTF8.GetBytes(b3dm.BatchTableJson));
if (b3dm.BatchTableBinary != null)
{
binaryWriter.Write(b3dm.BatchTableBinary);
}
binaryWriter.Write(b3dm.GlbData);
binaryWriter.Flush();
binaryWriter.Close();
return(fileStream.Name);
}
static void Pack(PackOptions o)
{
Console.WriteLine($"Action: Pack");
Console.WriteLine($"Input: {o.Input}");
var f = File.ReadAllBytes(o.Input);
var batchFile = Path.GetFileNameWithoutExtension(o.Input) + ".batch";
var b3dm = new B3dm.Tile.B3dm(f);
if (File.Exists(batchFile))
{
Console.WriteLine($"Input batch file: {batchFile}");
var batchTableJson = File.ReadAllLines(batchFile);
b3dm.FeatureTableJson = batchTableJson[0];
b3dm.BatchTableJson = batchTableJson[1];
}
var b3dmfile = (o.Output == string.Empty ? Path.GetFileNameWithoutExtension(o.Input) + ".b3dm" : o.Output);
if (File.Exists(b3dmfile) && !o.Force)
{
Console.WriteLine($"File {b3dmfile} already exists. Specify -f or --force to overwrite existing files.");
}
else
{
B3dmWriter.WriteB3dm(b3dmfile, b3dm);
Console.WriteLine("B3dm created " + b3dmfile);
}
}
static void Main(string[] args)
{
Console.WriteLine("Sample conversion from glb to b3dm.");
var inputfile = @"testfixtures/building.glb";
var buildingGlb = File.ReadAllBytes(inputfile);
var b3dm = new B3dm.Tile.B3dm(buildingGlb);
B3dmWriter.WriteB3dm($"building.b3dm", b3dm);
Console.WriteLine($"File building.b3dm is written...");
Console.WriteLine($"Press any key to continue...");
Console.ReadKey();
}
private static void WriteTiles(NpgsqlConnection conn, string geometryTable, string geometryColumn, string idcolumn, double[] translation, Node node, string outputPath, string colorColumn = "", string attributesColumn = "")
{
if (node.Features.Count > 0)
{
counter++;
var subset = (from f in node.Features select(f.Id)).ToArray();
var geometries = BoundingBoxRepository.GetGeometrySubset(conn, geometryTable, geometryColumn, idcolumn, translation, subset, colorColumn, attributesColumn);
var triangleCollection = GetTriangles(geometries);
var bytes = GlbCreator.GetGlb(triangleCollection);
var b3dm = new B3dm.Tile.B3dm(bytes);
var featureTable = new FeatureTable();
featureTable.BATCH_LENGTH = geometries.Count;
b3dm.FeatureTableJson = JsonConvert.SerializeObject(featureTable);
if (attributesColumn != string.Empty)
{
var batchtable = new BatchTable();
var allattributes = new List <object>();
foreach (var geom in geometries)
{
// only take the first now....
allattributes.Add(geom.Attributes[0]);
}
var item = new BatchTableItem();
item.Name = attributesColumn;
item.Values = allattributes.ToArray();
batchtable.BatchTableItems.Add(item);
var json = JsonConvert.SerializeObject(batchtable, new BatchTableJsonConverter(typeof(BatchTable)));
b3dm.BatchTableJson = json;
}
B3dmWriter.WriteB3dm($"{outputPath}/tiles/{node.Id}.b3dm", b3dm);
}
// and write children too
foreach (var subnode in node.Children)
{
var perc = Math.Round(((double)counter / Counter.Instance.Count) * 100, 2);
Console.Write($"\rProgress: tile {counter} - {perc.ToString("F")}%");
WriteTiles(conn, geometryTable, geometryColumn, idcolumn, translation, subnode, outputPath, colorColumn, attributesColumn);
}
}
public static B3dm ReadB3dm(BinaryReader reader)
{
var b3dmHeader = new B3dmHeader(reader);
var featureTableJson = Encoding.UTF8.GetString(reader.ReadBytes(b3dmHeader.FeatureTableJsonByteLength));
var featureTableBytes = reader.ReadBytes(b3dmHeader.FeatureTableBinaryByteLength);
var batchTableJson = Encoding.UTF8.GetString(reader.ReadBytes(b3dmHeader.BatchTableJsonByteLength));
var batchTableBytes = reader.ReadBytes(b3dmHeader.BatchTableBinaryByteLength);
var glbLength = b3dmHeader.ByteLength - b3dmHeader.Length;
var glbBuffer = reader.ReadBytes(glbLength);
var b3dm = new B3dm {
B3dmHeader = b3dmHeader,
GlbData = glbBuffer,
FeatureTableJson = featureTableJson,
FeatureTableBinary = featureTableBytes,
BatchTableJson = batchTableJson,
BatchTableBinary = batchTableBytes
};
return(b3dm);
}
public static B3dm ReadB3dm(Stream stream)
{
using (var reader = new BinaryReader(stream)) {
var b3dmHeader = new B3dmHeader(reader);
var featureTableJson = Encoding.UTF8.GetString(reader.ReadBytes(b3dmHeader.FeatureTableJsonByteLength));
var featureTableBytes = reader.ReadBytes(b3dmHeader.FeatureTableBinaryByteLength);
var batchTableJson = Encoding.UTF8.GetString(reader.ReadBytes(b3dmHeader.BatchTableJsonByteLength));
var batchTableBytes = reader.ReadBytes(b3dmHeader.BatchTableBinaryByteLength);
var glbLength = (int)(reader.BaseStream.Length - reader.BaseStream.Position);
var glbBuffer = reader.ReadBytes(glbLength);
var b3dm = new B3dm {
B3dmHeader = b3dmHeader,
GlbData = glbBuffer,
FeatureTableJson = featureTableJson,
FeatureTableBinary = featureTableBytes,
BatchTableJson = batchTableJson,
BatchTableBinary = batchTableBytes
};
return(b3dm);
}
}
private static void WriteTiles(NpgsqlConnection conn, string geometryTable, string geometryColumn, double[] translation, Node node, string outputPath, string colorColumn = "")
{
if (node.Features.Count > 0)
{
counter++;
var subset = (from f in node.Features select(f.Id)).ToArray();
var geometries = BoundingBoxRepository.GetGeometrySubset(conn, geometryTable, geometryColumn, translation, subset, colorColumn);
var triangleCollection = Triangulator.GetTriangles(geometries);
var bytes = GlbCreator.GetGlb(triangleCollection);
var b3dm = new B3dm.Tile.B3dm(bytes);
var featureTable = new FeatureTable();
featureTable.BATCH_LENGTH = geometries.Count;
b3dm.FeatureTableJson = JsonConvert.SerializeObject(featureTable);
var batchTable = new BatchTable();
var r = new Random();
var heights = new List <float>();
for (var i = 0; i < geometries.Count; i++)
{
heights.Add(r.Next(100));
}
batchTable.Height = heights.ToArray();
b3dm.BatchTableJson = JsonConvert.SerializeObject(batchTable);
B3dmWriter.WriteB3dm($"{outputPath}/tiles/{node.Id}.b3dm", b3dm);
}
// and write children too
foreach (var subnode in node.Children)
{
var perc = Math.Round(((double)counter / Counter.Instance.Count) * 100, 2);
Console.Write($"\rProgress: tile {counter} - {perc.ToString("F")}%");
WriteTiles(conn, geometryTable, geometryColumn, translation, subnode, outputPath, colorColumn);
}
}
public void WriteB3dm()
{
var buildingGlb = File.ReadAllBytes(@"1.glb");
var b3dm = new B3dm.Tile.B3dm(buildingGlb);
var res = b3dm.ToBytes();
}
