130 lines
4.1 KiB
Plaintext
130 lines
4.1 KiB
Plaintext
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/* -*-c++-*- */
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/* osgEarth - Geospatial SDK for OpenSceneGraph
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* Copyright 2020 Pelican Mapping
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* http://osgearth.org
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*
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* osgEarth is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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#ifndef OSGEARTH_UTIL_FRACTAL_ELEVATION_LAYER
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#define OSGEARTH_UTIL_FRACTAL_ELEVATION_LAYER 1
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#include <osgEarth/Common>
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#include <osgEarth/TileSource>
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#include <osgEarth/ElevationLayer>
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#include <osgEarth/LayerReference>
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#include <osgEarth/URI>
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#include <osgEarth/LandCover>
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#include <osgEarth/LandCoverLayer>
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namespace osgEarth { namespace Contrib
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{
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/**
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* Elevation layer that adds fractal noise offset values.
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*/
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class OSGEARTH_EXPORT FractalElevationLayer : public ElevationLayer
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{
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public:
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struct LandCoverMapping
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{
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std::string className;
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optional<float> amplitude;
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};
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typedef std::map<std::string, LandCoverMapping> LandCoverMap;
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public: // serialization
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class OSGEARTH_EXPORT Options : public ElevationLayer::Options {
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public:
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META_LayerOptions(osgEarth, Options, ElevationLayer::Options);
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OE_OPTION(float, frequency);
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OE_OPTION(float, persistence);
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OE_OPTION(float, lacunarity);
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OE_OPTION(unsigned, baseLOD);
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OE_OPTION(float, amplitude);
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OE_OPTION(LandCoverMap, landCoverMap);
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OE_OPTION(URI, noiseImageURI);
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virtual Config getConfig() const;
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private:
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void fromConfig(const Config& conf);
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};
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public:
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META_Layer(osgEarth, FractalElevationLayer, Options, ElevationLayer, FractalElevation);
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//! Simplex noise frequency
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void setFrequency(const float& value);
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const float& getFrequency() const;
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//! Simplex noise persistence
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void setPersistence(const float& value);
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const float& getPersistence() const;
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//! Simplex noise lacunarity
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void setLacunarity(const float& value);
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const float& getLacunarity() const;
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//! Reference LOD
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void setBaseLOD(const unsigned& value);
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const unsigned& getBaseLOD() const;
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//! Maximum change in elevation (total)
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void setAmplitude(const float& value);
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const float& getAmplitude() const;
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//! Mappings from land cover classes to amplitude values (optional)
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void setLandCoverMap(const LandCoverMap& value);
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const LandCoverMap& getLandCoverMap() const;
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//! URI of a noise texture to use to augment to simplex noise
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void setNoiseImageURI(const URI& value);
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const URI& getNodeImageURI() const;
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public: // ElevationLayer
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// opens the layer and returns the status
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virtual Status openImplementation();
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virtual void init();
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virtual Config getConfig() const;
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protected: // Layer
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// called by the map when this layer is added/removed
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virtual void addedToMap(const class Map*);
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virtual void removedFromMap(const class Map*);
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virtual GeoHeightField createHeightFieldImplementation(
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const TileKey& key,
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ProgressCallback* progress) const;
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protected:
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virtual ~FractalElevationLayer();
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LayerReference<LandCoverDictionary> _dictionary;
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LandCoverLayerVector _landCoverLayers;
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bool _debug;
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osg::ref_ptr<osg::Image> _noiseImage1;
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osg::ref_ptr<osg::Image> _noiseImage2;
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const LandCoverMapping* getMapping(const LandCoverClass*) const;
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};
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} }
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#endif // OSGEARTH_UTIL_FRACTAL_ELEVATION_LAYER
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