/* -*-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.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* 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_ENGINE_KEY_NODE_FACTORY
#define OSGEARTH_ENGINE_KEY_NODE_FACTORY 1

#include "Common"
#include <osgEarth/TileKey>
#include <osgEarth/Progress>
#include <osg/Node>

using namespace osgEarth;

namespace osgEarth { namespace Drivers { namespace MPTerrainEngine
{
    /**
    * Factory object that can create a scene graph given a TileKey.
    */
    class KeyNodeFactory : public osg::Referenced
    {
    public:

        /**
        * Creates a node for a tile key.
        */
        virtual osg::Node* createNode(
            const TileKey&    key, 
            bool              accumulate,
            bool              setupChildren,
            ProgressCallback* progress ) =0;


    protected:
        KeyNodeFactory();

        /** dtor */
        virtual ~KeyNodeFactory() { }
    };

} } } // namespace osgEarth::Drivers::MPTerrainEngine

#endif // OSGEARTH_ENGINE_KEY_NODE_FACTORY
