/usr/include/osgEarthSymbology/AltitudeSymbol is in libosgearth-dev 2.5.0+dfsg-2+b2.
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/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
* Copyright 2008-2013 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 OSGEARTHSYMBOLOGY_ALTITUDE_SYMBOL_H
#define OSGEARTHSYMBOLOGY_ALTITUDE_SYMBOL_H 1
#include <osgEarthSymbology/Symbol>
#include <osgEarthSymbology/Expression>
namespace osgEarth { namespace Symbology
{
/**
* Symbol that conveys information about altitude and terrain interaction
*/
class OSGEARTHSYMBOLOGY_EXPORT AltitudeSymbol : public Symbol
{
public:
/**
* Controls if/how models are clamped to the terrain
*/
enum Clamping
{
/** Do not clamp Z values to the terrain (but still apply the offset, if applicable) */
CLAMP_NONE,
/** Sample the terrain under the point, and set the feature's Z to the terrain height,
ignoring and discarding the feature's original Z value. */
CLAMP_TO_TERRAIN,
/** Sample the terrain under the point, and ADD the terrain height to the feature's
pre-existing Z value. */
CLAMP_RELATIVE_TO_TERRAIN,
/** The feature has a attribute value that describes its height above "height zero",
which is typically the ellipsoid or MSL. While this will not actually modify the
feature's geometry, it will install ... */
CLAMP_ABSOLUTE
};
/**
* Clamping technique - when and where to do clamping.
*/
enum Technique
{
/** Clamp geometry to the map model's elevation data. */
TECHNIQUE_MAP,
/** Clamp geometry to the terrain's scene graph. */
TECHNIQUE_SCENE,
/** Clamp geometry to the terrain as they are rendered by the GPU. */
TECHNIQUE_GPU,
/** Clamp geometry at draw time using projective texturing. */
TECHNIQUE_DRAPE
};
/**
* Binding - at what granularity the clamping is performed
*/
enum Binding
{
/** Clamp every vertex independently */
BINDING_VERTEX,
/** Clamp to the centroid of the entire geometry */
BINDING_CENTROID
};
public:
META_Symbol(AltitudeSymbol);
AltitudeSymbol( const Config& conf =Config() );
/** How to clamp instances to the terrain (default is CLAMP_NONE) */
optional<Clamping>& clamping() { return _clamping; }
const optional<Clamping>& clamping() const { return _clamping; }
/** Method of terrain following to use (default is TECHNIQUE_MAP) */
optional<Technique>& technique() { return _technique; }
const optional<Technique>& technique() const { return _technique; }
/** Terrain resolution at which to perform clamping (in map units) */
optional<float>& clampingResolution() { return _resolution; }
const optional<float>& clampingResolution() const { return _resolution; }
/** Granularity at which to clamp a geometry */
optional<Binding>& binding() { return _binding; }
const optional<Binding>& binding() const { return _binding; }
/** Vertical offset of geometry after clamping */
optional<NumericExpression>& verticalOffset() { return _verticalOffset; }
const optional<NumericExpression>& verticalOffset() const { return _verticalOffset; }
/** Vertical scale factor to apply to geometry's Z after clamping. */
optional<NumericExpression>& verticalScale() { return _verticalScale; }
const optional<NumericExpression>& verticalScale() const { return _verticalScale; }
public:
virtual Config getConfig() const;
virtual void mergeConfig( const Config& conf );
static void parseSLD(const Config& c, class Style& style);
protected:
virtual ~AltitudeSymbol() { }
optional<Clamping> _clamping;
optional<Technique> _technique;
optional<Binding> _binding;
optional<float> _resolution;
optional<NumericExpression> _verticalOffset;
optional<NumericExpression> _verticalScale;
};
} } // namespace osgEarth::Symbology
#endif // OSGEARTH_SYMBOLOGY_SYMBOL_H
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