/usr/include/osgEarthUtil/LODBlending is in libosgearth-dev 2.5.0+dfsg-2+b2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
* Copyright 2008-2012 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 OSGEARTHUTIL_LOD_BLENDING_H
#define OSGEARTHUTIL_LOD_BLENDING_H
#include <osgEarthUtil/Common>
#include <osgEarth/TerrainEffect>
#include <osg/Uniform>
#include <osg/Node>
#include <osg/observer_ptr>
namespace osgEarth { namespace Util
{
/**
* Terrain effect that blends terrain levels of detail for a
* smooth transition effect. Operates on elevation data and
* image data.
*
* Known limitation: LOD blending requires either (a) a fully-textured
* terrain, by way of a base layer that completely covers the map; or
* (b) a transparent globe color. It will not work properly with
* untextures (but colored) terrain tiles.
*/
class OSGEARTHUTIL_EXPORT LODBlending : public TerrainEffect
{
public:
/** construct a new blending effect */
LODBlending();
/** Sets the delay (in seconds) between the time the tile appears
and when it starts its transition */
void setDelay( float value );
float getDelay() const { return _delay.get(); }
/** Sets the duration of the transition */
void setDuration( float value );
float getDuration() const { return _duration.get(); }
/** Vertical scale factor to apply to elevation */
void setVerticalScale( float value );
float getVerticalScale() const { return _vscale.get(); }
public: // TerrainEffect interface
void onInstall(TerrainEngineNode* engine);
void onUninstall(TerrainEngineNode* engine);
public: // serialization
LODBlending(const Config& conf);
void mergeConfig(const Config& conf);
virtual Config getConfig() const;
protected:
virtual ~LODBlending() { }
void init();
optional<float> _delay;
optional<float> _duration;
optional<float> _vscale;
osg::ref_ptr<osg::Uniform> _delayUniform;
osg::ref_ptr<osg::Uniform> _durationUniform;
osg::ref_ptr<osg::Uniform> _vscaleUniform;
};
} } // namespace osgEarth::Util
#endif // OSGEARTHUTIL_LOD_BLENDING_H
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