terrain_stg.hxx

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// scenery.hxx -- data structures and routines for managing scenery.
//
// Written by Curtis Olson, started May 1997.
//
// Copyright (C) 1997  Curtis L. Olson  - http://www.flightgear.org/~curt
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU 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
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
// $Id$
 
 
#ifndef _TERRAIN_STG_HXX
#define _TERRAIN_STG_HXX
 
 
#ifndef __cplusplus                                                          
# error This library requires C++
#endif                                   
 
#include <osg/ref_ptr>
#include <osg/Switch>
 
#include <simgear/compiler.h>
#include <simgear/math/SGMath.hxx>
#include <simgear/scene/model/particles.hxx>
#include <simgear/structure/subsystem_mgr.hxx>
 
#include "terrain.hxx"
#include "SceneryPager.hxx"
#include "tilemgr.hxx"
 
namespace simgear {
class BVHMaterial;
}
 
// Define a structure containing global scenery parameters
class FGStgTerrain : public FGTerrain
{
public:
 
    FGStgTerrain();
    virtual ~FGStgTerrain();
 
    // Implementation of SGSubsystem.
    void init ( osg::Group* terrain );
    void reinit();
    void shutdown ();
    void bind ();
    void unbind ();
    void update (double dt);

    bool get_elevation_m(const SGGeod& geod, double& alt,
                         const simgear::BVHMaterial** material,
                         const osg::Node* butNotFrom = 0);

    bool get_cart_elevation_m(const SGVec3d& pos, double max_altoff,
                              double& elevation,
                              const simgear::BVHMaterial** material,
                              const osg::Node* butNotFrom = 0);

    bool get_cart_ground_intersection(const SGVec3d& start, const SGVec3d& dir,
                                      SGVec3d& nearestHit,
                                      const osg::Node* butNotFrom = 0);
    
    bool scenery_available(const SGGeod& position, double range_m);
 
    // tile mgr api
    bool schedule_scenery(const SGGeod& position, double range_m, double duration=0.0);
    void materialLibChanged();
    
    static const char* staticSubsystemClassId() { return "scenery"; }
 
private:
    // tile manager
    FGTileMgr _tilemgr;
    
    // terrain branch of scene graph
    osg::ref_ptr<osg::Group> terrain_branch;
    
    bool _inited;
};
 
#endif // _TERRAIN_STG_HXX