Collaboration diagram for osgEarth::Features::GriddingPolicy:

Public Types
enum	CullingTechnique { CULL_BY_CROPPING, CULL_BY_CENTROID }
Public Member Functions
	GriddingPolicy (const Config &conf=Config())
bool	enabled () const
virtual Config	getConfig () const
virtual void	fromConfig (const Config &conf)
optional< double > &	cellSize ()
const optional< double > &	cellSize () const
optional< CullingTechnique > &	cullingTechnique ()
const optional < CullingTechnique > &	cullingTechnique () const
optional< bool > &	spatializeGroups ()
const optional< bool > &	spatializeGroups () const
optional< bool > &	clusterCulling ()
const optional< bool > &	clusterCulling () const
Protected Attributes
optional< double >	_cellSize
optional< CullingTechnique >	_cullingTechnique
optional< bool >	_spatializeGroups
optional< bool >	_clusterCulling

Detailed Description

Defines how to grid and crop feature data when creating a model.

Definition at line 35 of file FeatureGridder.

Member Enumeration Documentation

enum osgEarth::Features::GriddingPolicy::CullingTechnique

Enumerator:

CULL_BY_CROPPING
CULL_BY_CENTROID

Definition at line 38 of file FeatureGridder.

        {
            /* crop a feature's shape to the oundaries of the grid cell;
               default for lines */
            CULL_BY_CROPPING,   

            /* include a feature in the cell only if its centroid is in the cell;
               default for polygons and points */
            CULL_BY_CENTROID
        };

Constructor & Destructor Documentation

GriddingPolicy::GriddingPolicy ( const Config & conf = Config() )

Definition at line 36 of file FeatureGridder.cpp.

                                                   :
_cellSize( DBL_MAX ),
_cullingTechnique( GriddingPolicy::CULL_BY_CENTROID ),
_spatializeGroups( true ),
_clusterCulling( false )
{
    fromConfig( conf );
}

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Member Function Documentation

optional<double>& osgEarth::Features::GriddingPolicy::cellSize ( ) [inline]

The maximum size (width and height) of each square grid cell.

Definition at line 61 of file FeatureGridder.

{ return _cellSize; }

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const optional<double>& osgEarth::Features::GriddingPolicy::cellSize ( ) const [inline]

Definition at line 62 of file FeatureGridder.

{ return _cellSize; }

const optional<bool>& osgEarth::Features::GriddingPolicy::clusterCulling ( ) const [inline]

Definition at line 74 of file FeatureGridder.

{ return _clusterCulling; }

optional<bool>& osgEarth::Features::GriddingPolicy::clusterCulling ( ) [inline]

Whether to install cluster cullers on the grid cell nodes

Definition at line 73 of file FeatureGridder.

{ return _clusterCulling; }

optional<CullingTechnique>& osgEarth::Features::GriddingPolicy::cullingTechnique ( ) [inline]

The technique to use to figure out how to include a feature in a cell.

Definition at line 65 of file FeatureGridder.

{ return _cullingTechnique; }

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const optional<CullingTechnique>& osgEarth::Features::GriddingPolicy::cullingTechnique ( ) const [inline]

Definition at line 66 of file FeatureGridder.

{ return _cullingTechnique; }

bool osgEarth::Features::GriddingPolicy::enabled ( ) const [inline]

Definition at line 52 of file FeatureGridder.

{ return _cellSize.isSet() && *_cellSize > 0.0; }

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void GriddingPolicy::fromConfig ( const Config & conf ) [virtual]

Definition at line 66 of file FeatureGridder.cpp.

{
    conf.getIfSet( PROP_CELL_SIZE, _cellSize );

    // read the culling technique
    if ( conf.hasValue( PROP_CULLING_TECHNIQUE ) ) {
        if ( conf.value( PROP_CULLING_TECHNIQUE ) == "crop" )
            _cullingTechnique = CULL_BY_CROPPING;
        else if ( conf.value( PROP_CULLING_TECHNIQUE ) == "centroid" )
            _cullingTechnique = CULL_BY_CENTROID;
    }

    // spatial optimization
    conf.getIfSet<bool>( PROP_SPATIALIZE_GROUPS, _spatializeGroups );

    // cluster culling
    conf.getIfSet<bool>( PROP_CLUSTER_CULLING, _clusterCulling );
}

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Config GriddingPolicy::getConfig ( ) const [virtual]

Definition at line 46 of file FeatureGridder.cpp.

{
    Config conf;

    conf.updateIfSet( PROP_CELL_SIZE, _cellSize );

    if ( _cullingTechnique.isSet() ) {
        if ( _cullingTechnique == CULL_BY_CROPPING )
            conf.update( PROP_CULLING_TECHNIQUE, "crop" );
        else if ( _cullingTechnique == CULL_BY_CENTROID )
            conf.update( PROP_CULLING_TECHNIQUE, "centroid" );
    }

    conf.updateIfSet( PROP_SPATIALIZE_GROUPS, _spatializeGroups );
    conf.updateIfSet( PROP_CLUSTER_CULLING, _clusterCulling );

    return conf;        
}