public unsafe override void read(laszip_point item)
{
if (instream.Read(buffer, 0, 30) != 30)
throw new EndOfStreamException();
fixed(byte *pBuffer = buffer)
{
LAStempReadPoint14 *p14 = (LAStempReadPoint14 *)pBuffer;
item.X = p14->x;
item.Y = p14->y;
item.Z = p14->z;
item.intensity = p14->intensity;
if (p14->number_of_returns_of_given_pulse > 7)
{
if (p14->return_number > 6)
{
if (p14->return_number >= p14->number_of_returns_of_given_pulse)
{
item.number_of_returns_of_given_pulse = 7;
}
else
{
item.number_of_returns_of_given_pulse = 6;
}
}
else
{
item.return_number = p14->return_number;
}
item.number_of_returns_of_given_pulse = 7;
}
else
{
item.return_number = p14->return_number;
item.number_of_returns_of_given_pulse = p14->number_of_returns_of_given_pulse;
}
item.scan_direction_flag = p14->scan_direction_flag;
item.edge_of_flight_line = p14->edge_of_flight_line;
item.classification = (byte)((p14->classification_flags << 5) | (p14->classification & 31));
item.scan_angle_rank = MyDefs.I8_CLAMP(MyDefs.I16_QUANTIZE(p14->scan_angle * 0.006));
item.user_data = p14->user_data;
item.point_source_ID = p14->point_source_ID;
item.extended_scanner_channel = p14->scanner_channel;
item.extended_classification_flags = (byte)(p14->classification_flags & 8); // TODO Häää?
item.extended_classification = p14->classification;
item.extended_return_number = p14->return_number;
item.extended_number_of_returns_of_given_pulse = p14->number_of_returns_of_given_pulse;
item.extended_scan_angle = p14->scan_angle;
item.gps_time = p14->gps_time;
}
}
public unsafe override bool write(laszip_point item)
{
fixed(byte *pBuffer = buffer)
{
LAStempWritePoint14 *p14 = (LAStempWritePoint14 *)pBuffer;
p14->x = item.X;
p14->y = item.Y;
p14->z = item.Z;
p14->intensity = item.intensity;
p14->scan_direction_flag = item.scan_direction_flag;
p14->edge_of_flight_line = item.edge_of_flight_line;
p14->classification = (byte)(item.classification & 31);
p14->user_data = item.user_data;
p14->point_source_ID = item.point_source_ID;
if (item.extended_point_type != 0)
{
p14->classification_flags = (byte)(item.extended_classification_flags | (item.classification >> 5));
if (item.extended_classification > 31)
{
p14->classification = item.extended_classification;
}
p14->scanner_channel = item.extended_scanner_channel;
p14->return_number = item.extended_return_number;
p14->number_of_returns_of_given_pulse = item.extended_number_of_returns_of_given_pulse;
p14->scan_angle = item.extended_scan_angle;
}
else
{
p14->classification_flags = (byte)(item.classification >> 5);
p14->scanner_channel = 0;
p14->return_number = item.return_number;
p14->number_of_returns_of_given_pulse = item.number_of_returns_of_given_pulse;
p14->scan_angle = MyDefs.I16_QUANTIZE(item.scan_angle_rank / 0.006f);
}
p14->gps_time = item.gps_time;
}
try
{
outstream.Write(buffer, 0, 30);
}
catch
{
return(false);
}
return(true);
}
