/usr/include/osgEarth/AlphaEffect 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 OSGEARTH_ALPHA_EFFECT_H
#define OSGEARTH_ALPHA_EFFECT_H
#include <osgEarth/Common>
#include <osg/StateSet>
#include <osg/Uniform>
#include <osg/observer_ptr>
namespace osgEarth
{
/**
* Shader effect that lets you adjust the alpha channel.
*/
class OSGEARTH_EXPORT AlphaEffect : public osg::Referenced
{
public:
/** constructs a new effect */
AlphaEffect();
/** contructs a new effect and attaches it to a stateset. */
AlphaEffect(osg::StateSet* stateset);
public:
/** The alpha channel value [0..1] */
void setAlpha(float value);
float getAlpha() const;
public:
/** attach this effect to a stateset. */
void attach(osg::StateSet* stateset);
/** detach this effect from any attached statesets. */
void detach();
/** detach this effect from a stateset. */
void detach(osg::StateSet* stateset);
protected:
virtual ~AlphaEffect();
typedef std::list< osg::observer_ptr<osg::StateSet> > StateSetList;
StateSetList _statesets;
osg::ref_ptr<osg::Uniform> _alphaUniform;
void init();
};
} // namespace osgEarth::Util
#endif // OSGEARTH_ALPHA_EFFECT_H
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