protected void collectGeometryKeys(QuadMap qmap, QuadKeyList geom_keys)
{
// the starting LOD is the best fit the the cell size:
uint top_lod = getTopLod(qmap, map_layer);
foreach (MapLayerLevelOfDetail i in map_layer.getLevels())
{
MapLayerLevelOfDetail level_def = i;
uint lod = top_lod + level_def.getDepth();
// get the extent of tiles that we will build based on the AOI:
uint cell_xmin, cell_ymin, cell_xmax, cell_ymax;
qmap.getCells(
map_layer.getAreaOfInterest(), lod,
cell_xmin, cell_ymin, cell_xmax, cell_ymax);
for (uint y = cell_ymin; y <= cell_ymax; y++)
{
for (uint x = cell_xmin; x <= cell_xmax; x++)
{
QuadKey key = new QuadKey(x, y, lod, qmap);
for (uint k = 0; k < 4; k++)
{
geom_keys.push_back(key.createSubKey(k));
}
}
}
}
}
static uint getTopLod(QuadMap qmap, MapLayer map_layer)
{
int bottom_lod = qmap.getBestLodForCellsOfSize(map_layer.getCellWidth(), map_layer.getCellHeight());
uint max_depth = map_layer.getMaxDepth();
long top_lod = Math.Max(0, bottom_lod - max_depth);
return((uint)top_lod);
}
// MapLayerCompiler interface
public virtual Profile createProfile()
{
// determine the output SRS:
SpatialReference out_srs = map_layer.getOutputSRS(getSession(), terrain_srs);
if (out_srs == null)
{
//osgGIS.warn() << "Unable to figure out the output SRS; aborting." << std.endl;
return(null);
}
// figure out the bounds of the compilation area and create a Q map. We want a sqaure AOI..maybe
GeoExtent aoi = map_layer.getAreaOfInterest();
if (aoi == null)
{
//osgGIS.warn() << "Invalid area of interest in the map layer - no data?" << std.endl;
return(null);
}
QuadMap qmap;
if (out_srs.isGeocentric())
{
// for a geocentric map, use a modified GEO quadkey:
// (yes, that MIN_LAT of -180 is correct...we want a square)
qmap = new QuadMap(new GeoExtent(-180.0, -180.0, 180.0, 90.0, Registry.SRSFactory().createWGS84()));
}
else
{
double max_span = Math.Max(aoi.getWidth(), aoi.getHeight());
GeoPoint sw = aoi.getSouthwest();
GeoPoint ne = new GeoPoint(sw.x() + max_span, sw.y() + max_span, aoi.getSRS());
qmap = new QuadMap(new GeoExtent(sw, ne));
}
#if TODO
qmap.setStringStyle(QuadMap.STYLE_LOD_QUADKEY);
#endif
// osgGIS.notice()
// << "QMAP: " << std.endl
// << " Top LOD = " << getTopLod( qmap, map_layer.get() ) << std.endl
// << " Depth = " << map_layer.getMaxDepth() << std.endl
// << " Extent = " << qmap.getBounds().toString() << ", w=" << qmap.getBounds().getWidth() << ", h=" << qmap.getBounds().getHeight() << std.endl
// << std.endl;
return(new QuadTreeProfile(qmap));
}
public QuadKey(uint cell_x, uint cell_y, uint lod, QuadMap map);
public QuadKey(string key_string, QuadMap map);
public QuadMap(QuadMap rhs);
public QuadTreeProfile(QuadMap _qmap)
: base()
{
qmap = _qmap;
}