//
// 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
# error This library requires C++
#endif
+#include <list>
-#include <simgear/point3d.hxx>
+#include <plib/sg.h>
+
+#include <simgear/compiler.h>
+#include <simgear/structure/subsystem_mgr.hxx>
+#include <simgear/math/point3d.hxx>
+
+SG_USING_STD(list);
+
+class ssgRoot;
+class ssgBranch;
+class ssgPlacementTransform;
// Define a structure containing global scenery parameters
-struct fgSCENERY {
+class FGScenery : public SGSubsystem {
// center of current scenery chunk
Point3D center;
// 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;
+ // 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;
+
+ // list of all placement transform, used to move the scenery center on the fly.
+ typedef list<ssgPlacementTransform*> placement_list_type;
+ placement_list_type _placement_list;
+
+public:
+
+ FGScenery();
+ ~FGScenery();
+
+ // Implementation of SGSubsystem.
+ void init ();
+ void bind ();
+ void unbind ();
+ void update (double dt);
+
+ /// 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 ssgBranch *get_terrain_branch () const { return terrain_branch; }
+ inline void set_terrain_branch (ssgBranch * t) { terrain_branch = t; }
+
+ inline ssgRoot *get_gnd_lights_root () const {
+ return gnd_lights_root;
+ }
+ inline void set_gnd_lights_root (ssgRoot *r) {
+ gnd_lights_root = r;
+ }
+
+ inline ssgRoot *get_vasi_lights_root () const {
+ return vasi_lights_root;
+ }
+ inline void set_vasi_lights_root (ssgRoot *r) {
+ vasi_lights_root = r;
+ }
+
+ inline ssgRoot *get_rwy_lights_root () const {
+ return rwy_lights_root;
+ }
+ inline void set_rwy_lights_root (ssgRoot *r) {
+ rwy_lights_root = r;
+ }
+
+ inline ssgRoot *get_taxi_lights_root () const {
+ return taxi_lights_root;
+ }
+ inline void set_taxi_lights_root (ssgRoot *r) {
+ taxi_lights_root = r;
+ }
+
+ inline ssgBranch *get_models_branch () const {
+ return models_branch;
+ }
+ inline void set_models_branch (ssgBranch *t) {
+ models_branch = t;
+ }
+
+ inline ssgBranch *get_aircraft_branch () const {
+ return aircraft_branch;
+ }
+ inline void set_aircraft_branch (ssgBranch *t) {
+ aircraft_branch = t;
+ }
+
+ void register_placement_transform(ssgPlacementTransform *trans);
+ void unregister_placement_transform(ssgPlacementTransform *trans);
};
-extern struct fgSCENERY scenery;
-
-
-// Initialize the Scenery Management system
-int fgSceneryInit( void );
-
-
-// Tell the scenery manager where we are so it can load the proper
-// data, and build the proper structures.
-void fgSceneryUpdate(double lon, double lat, double elev);
-
-
-// Render out the current scene
-void fgSceneryRender( void );
-
#endif // _SCENERY_HXX
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