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statistical encoding

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Arndt 2015-10-11 19:27:33 +02:00
parent f8dee5b7d1
commit ccf6641bad
41 changed files with 4543 additions and 1965 deletions
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75
brouter-mapaccess/src/main/java/btools/mapaccess/OsmLink.java
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@ -5,6 +5,8 @@
*/
package btools.mapaccess;
import btools.util.ByteDataReader;
public class OsmLink
{
@ -14,32 +16,77 @@ public class OsmLink
*/
public byte[] descriptionBitmap;
/**
* The target is either the next link or the target node
*/
public OsmNode targetNode;
public OsmLink next;
public byte[] firsttransferBytes;
public OsmLinkHolder firstlinkholder = null;
final public OsmTransferNode decodeFirsttransfer()
public byte[] geometry;
public boolean counterLinkWritten;
public boolean hasNewGeometry; // preliminary
public byte state;
public void setGeometry( byte[] geometry )
{
return firsttransferBytes == null ? null : OsmTransferNode.decode( firsttransferBytes );
this.geometry = geometry;
hasNewGeometry = true;
}
final public OsmTransferNode decodeFirsttransfer( OsmNode sourceNode )
{
if ( geometry == null ) return null;
if ( hasNewGeometry )
{
OsmTransferNode firstTransferNode = null;
OsmTransferNode lastTransferNode = null;
OsmNode startnode = counterLinkWritten ? targetNode : sourceNode;
ByteDataReader r = new ByteDataReader( geometry );
int olon = startnode.ilon;
int olat = startnode.ilat;
int oselev = startnode.selev;
while ( r.hasMoreData() )
{
OsmTransferNode trans = new OsmTransferNode();
trans.ilon = olon + r.readVarLengthSigned();
trans.ilat = olat + r.readVarLengthSigned();
trans.descriptionBitmap = descriptionBitmap;
trans.selev = (short)(oselev + r.readVarLengthSigned());
olon = trans.ilon;
olat = trans.ilat;
oselev = trans.selev;
if ( counterLinkWritten ) // reverse chaining
{
trans.next = firstTransferNode;
firstTransferNode = trans;
}
else
{
if ( lastTransferNode == null )
{
firstTransferNode = trans;
}
else
{
lastTransferNode.next = trans;
}
lastTransferNode = trans;
}
}
return firstTransferNode;
}
return OsmTransferNode.decode( geometry );
}
final public void encodeFirsttransfer( OsmTransferNode firsttransfer )
{
if ( firsttransfer == null ) firsttransferBytes = null;
else firsttransferBytes = OsmTransferNode.encode( firsttransfer );
if ( firsttransfer == null ) geometry = null;
else geometry = OsmTransferNode.encode( firsttransfer );
}
public boolean counterLinkWritten;
public byte state;
public OsmLinkHolder firstlinkholder = null;
final public void addLinkHolder( OsmLinkHolder holder )
{
if ( firstlinkholder != null ) { holder.setNextForLink( firstlinkholder ); }