public SQuantizedExtent3D(Extent3D extent)
{
_min = new SQuantizedPoint3D((int)extent.MinX, (int)extent.MinY, (int)extent.MinZ);
_max = new SQuantizedPoint3D((int)extent.MaxX, (int)extent.MaxY, (int)extent.MaxZ);
}
public LasHeader(BinaryReader reader)
{
var length = reader.BaseStream.Length;
if (length < MinHeaderSize[LasVersion.LAS_1_0])
{
throw new Exception("Invalid format: header too short");
}
if (Encoding.ASCII.GetString(reader.ReadBytes(FileSignature.Length)) != FileSignature)
{
throw new Exception("Invalid format: signature does not match");
}
_fileSourceId = reader.ReadUInt16();
_globalEncoding = reader.ReadLasGlobalEncoding();
_projectId = reader.ReadLasProjectId();
_version = reader.ReadLasVersionInfo();
_systemIdentifier = reader.ReadBytes(32).ToAsciiString();
_generatingSoftware = reader.ReadBytes(32).ToAsciiString();
_fileCreationDayOfYear = reader.ReadUInt16();
_fileCreationYear = reader.ReadUInt16();
_headerSize = reader.ReadUInt16();
_offsetToPointData = reader.ReadUInt32();
var minHeaderSize = MinHeaderSize[_version.Version];
if (length < minHeaderSize)
{
throw new Exception("Invalid format: header too short for version");
}
if (minHeaderSize > _headerSize)
{
throw new Exception("Invalid format: header size incorrect");
}
_numberOfVariableLengthRecords = reader.ReadUInt32();
_pointDataRecordFormat = reader.ReadByte();
_pointDataRecordLength = reader.ReadUInt16();
_legacyNumberOfPointRecords = reader.ReadUInt32();
_legacyNumberOfPointsByReturn = reader.ReadUInt32Array(5);
_quantization = reader.ReadSQuantization3D();
_extent = reader.ReadExtent3D();
if (_version.Version >= LasVersion.LAS_1_3)
{
_startOfWaveformDataPacketRecord = reader.ReadUInt64();
}
if (_version.Version >= LasVersion.LAS_1_4)
{
_startOfFirstExtendedVariableLengthRecord = reader.ReadUInt64();
_numberOfExtendedVariableLengthRecords = reader.ReadUInt32();
_numberOfPointRecords = reader.ReadUInt64();
_numberOfPointsByReturn = reader.ReadUInt64Array(15);
}
else
{
_numberOfPointRecords = _legacyNumberOfPointRecords;
_numberOfPointsByReturn = new ulong[15];
for (var i = 0; i < _legacyNumberOfPointsByReturn.Length; i++)
{
_numberOfPointsByReturn[i] = _legacyNumberOfPointsByReturn[i];
}
}
// This doesn't apply to LAZ files
//ulong pointDataRegionLength = (ulong)length - _offsetToPointData;
//if (pointDataRegionLength < _pointDataRecordLength * PointCount)
// throw new Exception("Invalid format: point data region is not the expected size");
}
