/* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
 * Copyright 2015 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_SPLAT_BIOME_SELECTOR_CALLBACK
#define OSGEARTH_SPLAT_BIOME_SELECTOR_CALLBACK 1

#include "Biome"
#include <osg/NodeCallback>
#include <osg/Polytope>

namespace osgEarth { namespace Splat
{
    /**
     * Cull callback that applies the approprate stateset based on what
     * it determines to be the active Biome.
     */
    class BiomeSelector : public osg::NodeCallback
    {
    public:
        BiomeSelector(
            const BiomeVector&           biomes,
            const SplatTextureDefVector& textureDefs,
            osg::StateSet*               basicStateSet,
            int                          textureImageUnit);

    public: // osg::NodeCallback

        void operator()(osg::Node* node, osg::NodeVisitor* nv);

    protected:
        BiomeVector                                _biomes;
        std::vector< osg::ref_ptr<osg::StateSet> > _stateSets;
        std::vector< osg::Polytope >               _topes;
    };

} } // namespace osgEarth::Splat

#endif // OSGEARTH_SPLAT_BIOME_SELECTOR_CALLBACK
