/home/cube/sources/osgearth/src/osgEarthDrivers/engine_seamless/GeoPatch

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/* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
 * Copyright 2010 Pelican Ventures, Inc.
 * 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 SEAMLESS_GEOPATCH
#define SEAMLESS_GEOPATCH 1
// Patch subclass for the Geographic (whole earth) patch
// implementation.

#include "Patch"

#include <osg/Vec3>
#include <osg/Vec2d>

#include <osgEarth/TileKey>

namespace seamless
{
class Geographic;

class GeoPatch : public Patch
{
public:
    GeoPatch();
    GeoPatch(const osgEarth::TileKey& key);
    GeoPatch(const GeoPatch& rhs,
             const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY);

    META_Node(seamless, GeoPatch);

    virtual float getEdgeError(const osg::Vec3& eye, int edge);
    void setGeographic(Geographic*);
    Geographic* getGeographic() const;
protected:
    int _face;
    double _edgeLengths[4];
    osg::Vec2d _faceCoords[4];
};

}
#endif