/usr/include/osgEarth/ElevationLayer is in libosgearth-dev 2.9.0+dfsg-1.
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/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
* Copyright 2016 Pelican Mapping
* http://osgearth.org
*
* osgEarth is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
#ifndef OSGEARTH_ELEVATION_TERRAIN_LAYER_H
#define OSGEARTH_ELEVATION_TERRAIN_LAYER_H 1
#include <osgEarth/TerrainLayer>
#include <osg/MixinVector>
namespace osgEarth
{
/**
* Initialization and serialization options for an elevation layer.
*/
class OSGEARTH_EXPORT ElevationLayerOptions : public TerrainLayerOptions
{
public:
/** Constructs new elevation layer options. */
ElevationLayerOptions();
/** Deserializes new elevation layer options. */
ElevationLayerOptions(const ConfigOptions& options);
// Constructs new options with a layer name
ElevationLayerOptions(const std::string& name);
/** Constructs new elevation layer options, given the underlying driver options. */
ElevationLayerOptions(const std::string& name, const TileSourceOptions& driverOptions);
/** dtor */
virtual ~ElevationLayerOptions() { }
public:
optional<bool>& offset() { return _offset; }
const optional<bool>& offset() const { return _offset; }
/** Policy for dealing with NO_DATA values in elevation */
optional<ElevationNoDataPolicy>& noDataPolicy() { return _noDataPolicy; }
const optional<ElevationNoDataPolicy>& noDataPolicy() const { return _noDataPolicy; }
public:
virtual Config getConfig() const;
virtual void mergeConfig( const Config& conf );
private:
void fromConfig( const Config& conf );
void setDefaults();
optional<bool> _offset;
optional<ElevationNoDataPolicy> _noDataPolicy;
};
struct ElevationLayerCallback : public TerrainLayerCallback
{
//EMPTY
typedef void (ElevationLayerCallback::*MethodPtr)(class ElevationLayer*);
};
/**
* A map terrain layer containing elevation grid heightfields.
*/
class OSGEARTH_EXPORT ElevationLayer : public TerrainLayer
{
public:
META_Layer(osgEarth, ElevationLayer, ElevationLayerOptions);
/**
* Constructs a blank Elevation Layer;
* Use options() to set up before calling open or adding to a Map.
*/
ElevationLayer();
/**
* Constructs a new elevation layer with the specified options. It expects
* the layer options to contain a reference to the neccesary driver options.
*/
ElevationLayer( const ElevationLayerOptions& options );
/**
* Constructs a new elevation layer with the specific name and driver options.
* The layer will load its driver by using the tilesource options.
*/
ElevationLayer( const std::string& name, const TileSourceOptions& driverOptions );
/**
* Constructs a new elevation layer with the specified layer options and with a custom
* TileSource instance created by the user.
*
* Note: the ElevationLayerOptions contains a driver() member for configuring a
* TileSource. But in this constructor, you are passing in an existing TileSource,
* and thus the driver() member in ElevationLayerOptions will not be used.
*/
ElevationLayer( const ElevationLayerOptions& options, TileSource* tileSource );
/** dtor */
virtual ~ElevationLayer() { }
public: // methods
/**
* Creates a GeoHeightField for this layer that corresponds to the extents and LOD
* in the specified TileKey. The returned HeightField will always match the geospatial
* extents of that TileKey.
*
* @param key TileKey for which to create a heightfield.
*/
GeoHeightField createHeightField(const TileKey& key);
/**
* Creates a GeoHeightField for this layer that corresponds to the extents and LOD
* in the specified TileKey. The returned HeightField will always match the geospatial
* extents of that TileKey.
*
* @param key TileKey for which to create a heightfield.
* @param progress Callback for tracking progress and cancelation
*/
GeoHeightField createHeightField(const TileKey& key, ProgressCallback* progress);
/**
* Whether this layer contains offsets instead of absolute heights
*/
bool isOffset() const;
protected: // Layer
virtual void init();
protected:
// ctor called by a subclass that owns the options structure
ElevationLayer(ElevationLayerOptions* optionsPtr);
//! Subclass can override this by calling setTileSourceExpected(false).
//! You can create your own normal map, but usually ElevationLayer
//! will do this for you. Only do it if you really need to create
//! one by hand (for example, if you are compositing elevaition layers).
virtual void createImplementation(
const TileKey& key,
osg::ref_ptr<osg::HeightField>& out_hf,
osg::ref_ptr<NormalMap>& out_normalMap,
ProgressCallback* progress);
private:
mutable osg::ref_ptr<TileSource::HeightFieldOperation> _preCacheOp;
TileSource::HeightFieldOperation* getOrCreatePreCacheOp();
Threading::Mutex _mutex;
// creates a geoHF directly from the tile source
osg::HeightField* createHeightFieldFromTileSource(
const TileKey& key,
ProgressCallback* progress);
void assembleHeightField(
const TileKey& key,
osg::ref_ptr<osg::HeightField>& out_hf,
osg::ref_ptr<NormalMap>& out_normalMap,
ProgressCallback* progress);
};
/**
* Vector of elevation layers, with added methods.
*/
class OSGEARTH_EXPORT ElevationLayerVector : public osg::MixinVector< osg::ref_ptr<ElevationLayer> >
{
public:
/**
* Populates an existing height field (hf must already exist) with height
* values from the elevation layers.
*/
bool populateHeightFieldAndNormalMap(
osg::HeightField* hf,
NormalMap* normalMap,
const TileKey& key,
const Profile* haeProfile,
ElevationInterpolation interpolation,
ProgressCallback* progress ) const;
public:
/** Default ctor */
ElevationLayerVector();
/** Copy ctor */
ElevationLayerVector(const ElevationLayerVector& rhs);
};
} // namespace osgEarth
#endif // OSGEARTH_ELEVATION_TERRAIN_LAYER_H
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