117 lines
4.1 KiB
Plaintext
117 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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#pragma once
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#include <osgEarth/Common>
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#include <osgEarth/ElevationLayer>
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#include <osgEarth/ElevationPool>
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#include <osgEarth/LayerReference>
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#include <osgEarth/FeatureSource>
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#include <osgEarth/Session>
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#include <osgEarth/StyleSheet>
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namespace osgEarth { namespace Contrib
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{
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/**
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* Elevation layer that overlays modified elevation samples intended to
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* flatten the terrain around vector features. The use case is to make
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* roads flat or prevent rivers and lakes from sloping with the terrain.
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*/
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class OSGEARTH_EXPORT FlatteningLayer : public ElevationLayer
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{
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public:
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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_LAYER(FeatureSource, featureSource);
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OE_OPTION_VECTOR(ConfigOptions, filters);
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OE_OPTION_LAYER(StyleSheet, styleSheet);
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OE_OPTION(NumericExpression, lineWidth, 10);
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OE_OPTION(NumericExpression, bufferWidth, 20);
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OE_OPTION(bool, fill, false);
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virtual Config getConfig() const;
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private:
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void fromConfig(const Config&);
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};
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public:
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META_Layer(osgEarth, FlatteningLayer, Options, ElevationLayer, FlattenedElevation);
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//! Feature source layer to get features from
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void setFeatureSource(FeatureSource* layer);
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FeatureSource* getFeatureSource() const { return options().featureSource().getLayer(); }
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//! Style sheet for optional scripting
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void setStyleSheet(StyleSheet* layer);
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StyleSheet* getStyleSheet() const { return options().styleSheet().getLayer(); }
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//! For line features, the width around the line to flatten
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void setLineWidth(const NumericExpression& value);
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const NumericExpression& getLineWidth() const;
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//! Width of the buffer between the flattened terrain and the natural terrain,
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//! which will serve as a transition area.
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void setBufferWidth(const NumericExpression& value);
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const NumericExpression& getBufferWidth() const;
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//! Whether to write all samples (default=false) with source elev instead of
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//! writing NO_DATA_VALUE where no features exist
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void setFill(const bool& value);
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const bool& getFill() const;
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public: // ElevationLayer
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void init() override;
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Status openImplementation() override;
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Config getConfig() const override;
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protected: // ElevationLayer
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GeoHeightField createHeightFieldImplementation(
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const TileKey& key,
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ProgressCallback* progress) const override;
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//! called by the map when this layer is added
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void addedToMap(const class Map*) override;
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//! called by the map when this layer is removed
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void removedFromMap(const class Map*) override;
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protected:
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virtual ~FlatteningLayer();
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private:
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osg::ref_ptr<ElevationPool> _pool;
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mutable ElevationPool::WorkingSet _elevWorkingSet;
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osg::ref_ptr<Session> _session;
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FeatureFilterChain _filterChain;
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GeoHeightField createFromFeatures(const TileKey& key, ProgressCallback* progress) const;
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GeoHeightField createFromSDF(const TileKey& key, ProgressCallback* progress) const;
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};
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} }
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OSGEARTH_SPECIALIZE_CONFIG(osgEarth::Contrib::FlatteningLayer::Options);
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