X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FScenery%2Fscenery.hxx;h=bd976ba231ce82121a8ce1895528aa7fe8821bf6;hb=674a295896a1e56d605f39874262d6f146a586a3;hp=baf9cce2267062e5e530d26ee509ed04ce6494d3;hpb=1294aed4650ec2aacef27a7fdeb2f4e012516ca0;p=flightgear.git

diff --git a/src/Scenery/scenery.hxx b/src/Scenery/scenery.hxx
index baf9cce22..bd976ba23 100644
--- a/src/Scenery/scenery.hxx
+++ b/src/Scenery/scenery.hxx
@@ -2,7 +2,7 @@
 //
 // 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
@@ -16,7 +16,7 @@
 //
 // 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.
 //
 // $Id$
 
@@ -29,41 +29,90 @@
 # error This library requires C++
 #endif                                   
 
+#include <osg/ref_ptr>
+#include <osg/Group>
 
-#include <simgear/math/point3d.hxx>
+#include <simgear/compiler.h>
+#include <simgear/math/SGMath.hxx>
+#include <simgear/structure/subsystem_mgr.hxx>
 
+#include "SceneryPager.hxx"
 
-// Define a structure containing global scenery parameters
-struct fgSCENERY {
-    // center of current scenery chunk
-    Point3D center;
-
-    // next center of current scenery chunk
-    Point3D next_center;
-
-    // angle of sun relative to current local horizontal
-    double sun_angle;
+class SGMaterial;
 
-    // elevation of terrain at our current lat/lon (based on the
-    // actual drawn polygons)
-    double cur_elev;
+// Define a structure containing global scenery parameters
+class FGScenery : public SGSubsystem {
+
+    // scene graph
+    osg::ref_ptr<osg::Group> scene_graph;
+    osg::ref_ptr<osg::Group> terrain_branch;
+    osg::ref_ptr<osg::Group> models_branch;
+    osg::ref_ptr<osg::Group> aircraft_branch;
+
+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(const SGGeod& geod, double& alt,
+                         const SGMaterial** material,
+                         const osg::Node* butNotFrom = 0);
+
+    /// 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 SGVec3d& pos, double max_altoff,
+                              double& elevation, const SGMaterial** material,
+                              const osg::Node* butNotFrom = 0);
+
+    /// 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 SGVec3d& start, const SGVec3d& dir,
+                                      SGVec3d& nearestHit,
+                                      const osg::Node* butNotFrom = 0);
+
+    osg::Group *get_scene_graph () const { return scene_graph.get(); }
+    osg::Group *get_terrain_branch () const { return terrain_branch.get(); }
+    osg::Group *get_models_branch () const { return models_branch.get(); }
+    osg::Group *get_aircraft_branch () const { return aircraft_branch.get(); }
+
+    /// Returns true if scenery is avaliable for the given lat, lon position
+    /// within a range of range_m.
+    /// lat and lon are expected to be in degrees.
+    bool scenery_available(const SGGeod& position, double range_m);
+
+    // Static because access to the pager is needed before the rest of
+    // the scenery is initialized.
+    static flightgear::SceneryPager* getPagerSingleton();
 };
 
-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