91 lines
2.8 KiB
Plaintext
91 lines
2.8 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_GEOID_H
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#define OSGEARTH_GEOID_H 1
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#include <osgEarth/Common>
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#include <osgEarth/GeoCommon>
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#include <osgEarth/Bounds>
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#include <osgEarth/Units>
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#include <osg/Referenced>
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namespace osg
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{
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class HeightField;
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}
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namespace osgEarth
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{
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/**
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* An equipotential surface representing a gravitational model of the
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* planet's surface. Each value in the geoid's height field is an offset
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* from the reference ellipsoid.
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*/
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class OSGEARTH_EXPORT Geoid : public osg::Referenced
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{
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public:
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Geoid();
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/** dtor */
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virtual ~Geoid() { }
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/** Gets the readable name of this geoid. */
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void setName( const std::string& value );
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const std::string& getName() const { return _name; }
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/**
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* Sets the heightfield representing this geoid. The heightfield must be referenced
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* as a lat/long grid (with the origin and intervals in degrees).
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*/
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void setHeightField( osg::HeightField* hf );
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const osg::HeightField* getHeightField() const { return _hf.get(); }
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/**
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* Queries the geoid for the height offset at the specified geodetic
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* coordinates (in degrees).
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*/
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float getHeight(
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double lat_deg,
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double lon_deg,
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const RasterInterpolation& interp =INTERP_BILINEAR) const;
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/** The linear units in which height values are expressed. */
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const UnitsType& getUnits() const { return _units; }
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void setUnits( const UnitsType& value );
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/** Whether this is a valid object to use */
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bool isValid() const { return _valid; }
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/** True if two geoids are mathmatically equivalent. */
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bool isEquivalentTo( const Geoid& rhs ) const;
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private:
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std::string _name;
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UnitsType _units;
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bool _valid;
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Bounds _bounds;
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osg::ref_ptr<osg::HeightField> _hf;
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void validate();
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};
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}
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#endif // OSGEARTH_GEODATA_H
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