/**
* Gets the layer extent that this compiler will use. If this is set
* to GeoExtent.Infinite, that compiler will query the feature layer
* for its full extent and use that as the AOI.
*/
public GeoExtent getAreaOfInterest(FeatureLayer layer)
{
if (aoi_xmin < aoi_xmax && aoi_ymin < aoi_ymax)
{
return(new GeoExtent(aoi_xmin, aoi_ymin, aoi_xmax, aoi_ymax, layer.getSRS()));
}
else
{
return(layer.getExtent());
}
}
/**
* Pushes source data onto the level of detail queue. Levels of detail are
* interpreted from front to back.
*
* @param layer
* Feature layer from which to read source data
* @param graph
* Filter graph to use to build scene graph
* @param min_range
* Minimum visibility range of this level of detail
* @param max_range
* Maximum visibility range of this level of detail
* @param replace
* If true, this detail level will replace the ones before it. If false, it
* will join the scene graph without removing the previous levels.
* @param depth
* Level of detail depth (0 = top level)
* @param user_data
* User-defined data to pass to the cell compiler
*/
public void push(FeatureLayer layer,
FilterGraph graph,
Properties env_props,
ResourcePackager packager,
float min_range,
float max_range,
bool replace,
uint depth,
object user_data)
{
if (layer != null)
{
// update the automatic AOI:
if (!aoi_auto.isValid())
aoi_auto = layer.getExtent();
else
aoi_auto.expandToInclude(layer.getExtent());
// store the LOD definition:
levels.Add(new MapLayerLevelOfDetail(
layer, graph, env_props, packager, min_range, max_range, replace, depth, user_data));
grid_valid = false;
}
}