/usr/include/osgEarthSymbology/MeshSubdivider 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_MESH_SUBDIVIDER
#define OSGEARTHSYMBOLOGY_MESH_SUBDIVIDER
#include <osgEarthSymbology/Common>
#include <osgEarth/GeoMath>
#include <osg/Geometry>
#include <osg/PrimitiveSet>
namespace osgEarth { namespace Symbology
{
/**
* Recursively subdivides (tesselates) a geocentric geometry mesh to the specified
* granularity. This class will densify a geocentric primitive to more accurately
* conform to the ellipsoidal surface of the earth, for example.
*/
class OSGEARTHSYMBOLOGY_EXPORT MeshSubdivider
{
public:
/**
* Construct a new subdivider.
* Optionally, provide localizer/delocalizer transforms that will take
* vertex locations in and out of world geocentric coordinates.
*/
MeshSubdivider(
const osg::Matrixd& world2local =osg::Matrixd::identity(),
const osg::Matrixd& local2world =osg::Matrixd::identity() );
/**
* Sets the maximum number elements in each generated primitive set.
*/
void setMaxElementsPerEBO( unsigned int value ) {
_maxElementsPerEBO = value; }
/**
* Subdivides an OSG geometry's primitives to the specified granularity.
* Granularity is an angle, specified in radians - it is the maximum
* allowable angle between two points in a triangle.
*
* This method will also coalesce all the polygonal primitive sets in the geometry
* into a single GL_TRIANGLES primitive.
*
* Note! This utility currently does nothing with repsect to the geometry's
* color or texture attributes, so it is best used prior to setting those.
*/
void run(
osg::Geometry& geom,
double granurality_radians,
GeoInterpolation interp =GEOINTERP_RHUMB_LINE );
protected:
osg::Matrixd _local2world, _world2local;
unsigned int _maxElementsPerEBO;
};
} } // namespace osgEarth::Symbology
#endif // OSGEARTHSYMBOLOGY_MESH_SUBDIVIDER
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