osgEarth 2.1.1

/home/cube/sources/osgearth/src/osgEarthFeatures/ScatterFilter

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00001 /* -*-c++-*- */
00002 /* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
00003  * Copyright 2008-2010 Pelican Mapping
00004  * http://osgearth.org
00005  *
00006  * osgEarth is free software; you can redistribute it and/or modify
00007  * it under the terms of the GNU Lesser General Public License as published by
00008  * the Free Software Foundation; either version 2 of the License, or
00009  * (at your option) any later version.
00010  *
00011  * This program is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  * GNU Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public License
00017  * along with this program.  If not, see <http://www.gnu.org/licenses/>
00018  */
00019 
00020 #ifndef OSGEARTHFEATURES_SCATTER_FILTER_H
00021 #define OSGEARTHFEATURES_SCATTER_FILTER_H 1
00022 
00023 #include <osgEarthFeatures/Common>
00024 #include <osgEarthFeatures/Filter>
00025 #include <osgEarth/Random>
00026 
00027 namespace osgEarth { namespace Features
00028 {
00029     using namespace osgEarth;
00030     using namespace osgEarth::Symbology;
00031 
00037     class OSGEARTHFEATURES_EXPORT ScatterFilter : public FeatureFilter
00038     {
00039     public:
00040         // Call this determine whether this filter is available.
00041         static bool isSupported() { return true; }
00042 
00043     public:
00044         ScatterFilter();
00045 
00047         void setDensity( float value ) { _density = value; }
00048         float getDensity() const { return _density; }
00049 
00051         void setRandom( bool value ) { _random = value; }
00052         bool getRandom() const { return _random; }
00053 
00055         void setRandomSeed( unsigned value ) { _randomSeed = value; }
00056         unsigned getRandomSeed() const { return _randomSeed; }
00057 
00058     public:
00060         virtual FilterContext push( FeatureList& input, FilterContext& context );
00061 
00062     protected:
00063         void polyScatter(
00064             const Geometry*         input,
00065             const SpatialReference* inputSRS,
00066             const FilterContext&    context, 
00067             PointSet*               output);
00068 
00069         void lineScatter(
00070             const Geometry*         input,
00071             const SpatialReference* inputSRS,
00072             const FilterContext&    context, 
00073             PointSet*               output);
00074 
00075     private:
00076         float    _density;
00077         bool     _random;
00078         unsigned _randomSeed;
00079         Random   _prng;
00080     };
00081 
00082 } } // namespace osgEarth::Features
00083 
00084 #endif // OSGEARTHFEATURES_SUBSTITUTE_MODEL_FILTER_H
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