void
CoordsArg::addCoord( int32 lat, int32 lon, TileMap& tileMap )
{
if ( m_startCoordIdx == MAX_UINT32 ) {
m_allCoords = &tileMap.coordsRef();
m_startCoordIdx = m_allCoords->size();
m_endCoordIdx = m_allCoords->size();
}
TileMapCoord coord( lat, lon );
// Snap the coordinate to a pixel in the tile map.
tileMap.snapCoordToPixel( coord );
// Check that we're not adding duplicate coordinates.
if ( size() > 0 ) {
const TileMapCoord& lastCoord = back();
if ( lastCoord != coord ) {
// Not duplicated. Add.
push_back( coord );
}
} else {
// First coordinate. Add.
push_back( coord );
}
}
bool
CoordsArg::load( BitBuffer& buf, TileMap& tileMap,
const TileFeatureArg* prevArg )
{
const TileMapCoord* referenceCoord = &(tileMap.getReferenceCoord());
// Check if the previous coords last coordinate can be used as
// reference.
if ( prevArg != NULL ) {
// Use previous feature's last coordinate as reference.
const CoordsArg* prevCoordsArg =
static_cast<const CoordsArg*> ( prevArg );
MC2_ASSERT( prevCoordsArg->size() > 0 );
#ifndef SLIM_TILE_COORDS
referenceCoord = &(prevCoordsArg->back());
#else
referenceCoord = &(prevCoordsArg->back(tileMap));
#endif
}
// Write the number of coordinates.
int nbrBitsCoordSize = buf.readNextBits( 4 );
uint16 nbrCoords = buf.readNextBits( nbrBitsCoordSize );
if ( nbrCoords == 0 ) {
return true;
}
mc2dbg8 << "CoordsArg::load" << endl;
mc2dbg8 << "referenceCoord = "
<< referenceCoord->getLon()
<< ", " <<
referenceCoord->getLat()
<< ", mc2scale = "
<< tileMap.getMC2Scale()
<< endl;
// Nbr bits needed for start diff.
int nbrStartDiffBits = buf.readNextBits( 4 );
// Read startLatDiff.
int16 startLatDiff = buf.readNextSignedBits( nbrStartDiffBits );
// Read startLonDiff.
int16 startLonDiff = buf.readNextSignedBits( nbrStartDiffBits );
mc2dbg8 << "nbrStartDiffBits = " << nbrStartDiffBits << endl;
mc2dbg8 << " startLatDiff = " << startLatDiff << ", startLonDiff = "
<< startLonDiff << endl;
// Read bitsPerLatDiff.
int bitsPerLatDiff = buf.readNextBits( 4 );
// Read bitsPerLonDiff.
int bitsPerLonDiff = buf.readNextBits( 4 );
// Set the coordinates
TileMapCoords* allCoords = &(tileMap.coordsRef());
m_startCoordIdx = allCoords->size();
m_endCoordIdx = allCoords->size() + nbrCoords;
// Calculate the starting coordinate.
int32 prevLat = startLatDiff * tileMap.getMC2Scale() +
referenceCoord->getLat();
int32 prevLon = startLonDiff * tileMap.getMC2Scale() +
referenceCoord->getLon();
allCoords->push_back( TileMapCoord( prevLat, prevLon ) );
// Read the rest of the coords.
for ( int i = 1; i < nbrCoords; ++i ) {
// Lat
int16 latDiff = buf.readNextSignedBits( bitsPerLatDiff );
int32 curLat = latDiff * tileMap.getMC2Scale() + prevLat;
// Lon
int16 lonDiff = buf.readNextSignedBits( bitsPerLonDiff );
int32 curLon = lonDiff * tileMap.getMC2Scale() + prevLon;
mc2dbg8 << "diff " << latDiff << ", " << lonDiff << endl;
mc2dbg8 << "coord " << curLat << ", " << curLon << endl;
// Update prev coordinates.
prevLat = curLat;
prevLon = curLon;
// Set the coord.
allCoords->push_back( TileMapCoord( curLat, curLon ) );
}
// Oopendate de bundingboex.
for( uint32 h = m_startCoordIdx; h < m_endCoordIdx; ++h ) {
m_bbox.update( (*allCoords)[h].getLat(),
(*allCoords)[h].getLon(), false );
}
#ifndef SLIM_TILE_COORDS
m_allCoords = allCoords;
#endif
return true;
}
TileMapCoords::const_iterator
CoordsArg::end( TileMap& tileMap ) const
{
return tileMap.coordsRef().begin() + m_endCoordIdx;
}
TileMapCoords::iterator
CoordsArg::begin( TileMap& tileMap )
{
return tileMap.coordsRef().begin() + m_startCoordIdx;
}