package btools.mapcreator;

import btools.util.DiffCoderDataInputStream;
import btools.util.DiffCoderDataOutputStream;

/**
 * Container for node data on the preprocessor level
 *
 * @author ab
 */
public class NodeData extends MapCreatorBase
{
  public long nid;
  public int ilon;
  public int ilat;
  public byte[] description;
  public short selev = Short.MIN_VALUE;

  public NodeData( long id, double lon, double lat )
  {
    nid = id;
    ilat = (int)( ( lat + 90. )*1000000. + 0.5);
    ilon = (int)( ( lon + 180. )*1000000. + 0.5);
  }

  public NodeData( DiffCoderDataInputStream dis ) throws Exception
  {
    nid  = dis.readDiffed( 0 );
    ilon = (int)dis.readDiffed( 1 );
    ilat = (int)dis.readDiffed( 2 );
    int mode = dis.readByte();
    if ( ( mode & 1 ) != 0 ) { int dlen = dis.readShort(); description = new byte[dlen]; dis.readFully( description ); }
    if ( ( mode & 2 ) != 0 ) selev = dis.readShort();
  }

  public void writeTo( DiffCoderDataOutputStream dos ) throws Exception  
  {
    dos.writeDiffed( nid,  0 );
    dos.writeDiffed( ilon, 1 );
    dos.writeDiffed( ilat, 2 );
    int mode = (description == null ? 0 : 1 ) | ( selev == Short.MIN_VALUE ? 0 : 2 );
    dos.writeByte( (byte) mode);
    if ( ( mode & 1 ) != 0 ) { dos.writeShort( description.length ); dos.write( description ); }
    if ( ( mode & 2 ) != 0 ) dos.writeShort( selev );
  }
}