//
// Written by Curtis Olson, started May 1997.
//
-// Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
+// 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
//
// 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// $Id$
# error This library requires C++
#endif
+#include <list>
+
#include <plib/sg.h>
+#include <simgear/compiler.h>
#include <simgear/structure/subsystem_mgr.hxx>
#include <simgear/math/point3d.hxx>
+#include <simgear/scene/model/placementtrans.hxx>
+#include <simgear/structure/ssgSharedPtr.hxx>
+SG_USING_STD(list);
class ssgRoot;
class ssgBranch;
+
// Define a structure containing global scenery parameters
class FGScenery : public SGSubsystem {
// center of current scenery chunk
// next center of current scenery chunk
Point3D next_center;
+ // FIXME this should be a views property
// angle of sun relative to current local horizontal
double sun_angle;
- // elevation of terrain at our current lat/lon (based on the
- // actual drawn polygons)
- double cur_elev;
-
- // the distance (radius) from the center of the earth to the
- // current scenery elevation point
- double cur_radius;
-
- // unit normal at point used to determine current elevation
- sgdVec3 cur_normal;
-
// SSG scene graph
- ssgRoot *scene_graph;
- ssgBranch *terrain_branch;
- ssgRoot *gnd_lights_root;
- ssgRoot *vasi_lights_root;
- ssgRoot *rwy_lights_root;
- ssgRoot *taxi_lights_root;
- ssgBranch *models_branch;
- ssgBranch *aircraft_branch;
+ ssgSharedPtr<ssgRoot> scene_graph;
+ ssgSharedPtr<ssgBranch> terrain_branch;
+ ssgSharedPtr<ssgRoot> gnd_lights_root;
+ ssgSharedPtr<ssgRoot> vasi_lights_root;
+ ssgSharedPtr<ssgRoot> rwy_lights_root;
+ ssgSharedPtr<ssgRoot> taxi_lights_root;
+ ssgSharedPtr<ssgBranch> models_branch;
+ ssgSharedPtr<ssgBranch> aircraft_branch;
+
+ // list of all placement transform, used to move the scenery center on the fly.
+ typedef list<ssgSharedPtr<ssgPlacementTransform> > placement_list_type;
+ placement_list_type _placement_list;
public:
void unbind ();
void update (double dt);
- inline double get_cur_elev() const { return cur_elev; }
- inline void set_cur_elev( double e ) { cur_elev = e; }
-
- inline Point3D get_center() const { return center; }
- inline void set_center( Point3D p ) { center = p; }
-
- inline Point3D get_next_center() const { return next_center; }
- inline void set_next_center( Point3D p ) { next_center = p; }
-
- inline void set_cur_radius( double r ) { cur_radius = r; }
- inline void set_cur_normal( sgdVec3 n ) { sgdCopyVec3( cur_normal, n ); }
+ /// Compute the elevation of the scenery at geodetic latitude lat,
+ /// geodetic longitude lon and not higher than max_alt.
+ /// If the exact flag is set to true, the scenery center is moved to
+ /// gain a higher accuracy of that query. The center is restored past
+ /// that to the original value.
+ /// The altitude hit is returned in the alt argument.
+ /// The method returns true if the scenery is available for the given
+ /// lat/lon pair. If there is no scenery for that point, the altitude
+ /// value is undefined.
+ /// All values are meant to be in meters or degrees.
+ bool get_elevation_m(double lat, double lon, double max_alt,
+ double& alt, bool exact = false);
+
+ /// Compute the elevation of the scenery beow the cartesian point pos.
+ /// you the returned scenery altitude is not higher than the position
+ /// pos plus an ofset given with max_altoff.
+ /// If the exact flag is set to true, the scenery center is moved to
+ /// gain a higher accuracy of that query. The center is restored past
+ /// that to the original value.
+ /// The altitude hit is returned in the alt argument.
+ /// The method returns true if the scenery is available for the given
+ /// lat/lon pair. If there is no scenery for that point, the altitude
+ /// value is undefined.
+ /// All values are meant to be in meters.
+ bool get_cart_elevation_m(const sgdVec3& pos, double max_altoff,
+ double& radius, bool exact = false);
+
+ /// Compute the nearest intersection point of the line starting from
+ /// start going in direction dir with the terrain.
+ /// The input and output values should be in cartesian coordinates in the
+ /// usual earth centered wgs84 coordiante system. Units are meters.
+ /// On success, true is returned.
+ bool get_cart_ground_intersection(const sgdVec3& start, const sgdVec3& dir,
+ sgdVec3& nearestHit, bool exact = false);
+
+ inline const Point3D& get_center() const { return center; }
+ void set_center( const Point3D& p );
+
+ inline const Point3D& get_next_center() const { return next_center; }
+ inline void set_next_center( const Point3D& p ) { next_center = p; }
inline ssgRoot *get_scene_graph () const { return scene_graph; }
inline void set_scene_graph (ssgRoot * s) { scene_graph = s; }
inline void set_aircraft_branch (ssgBranch *t) {
aircraft_branch = t;
}
+
+ void register_placement_transform(ssgPlacementTransform *trans);
+ void unregister_placement_transform(ssgPlacementTransform *trans);
};
projects / flightgear.git / blobdiff