A long, long time ago, a bug was inadvertently introduced into the threaded

[flightgear.git] / src / Scenery / scenery.hxx

diff --git a/src/Scenery/scenery.hxx b/src/Scenery/scenery.hxx
index 847f2e3a4da4c25bcd7ed33dba6e40a6a77fd9a0..996eb8ddcfed7e8fd60a5e044711135450eaa3f4 100644 (file)
--- a/src/Scenery/scenery.hxx
+++ b/src/Scenery/scenery.hxx
@@ -105,14 +105,22 @@ public:
     /// 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,
+    bool get_cart_elevation_m(const sgdVec3& pos, double max_altoff,
                               double& radius, bool exact = false);
 
-    inline Point3D get_center() const { return center; }
-    void set_center( Point3D p );
+    /// 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 Point3D get_next_center() const { return next_center; }
-    inline void set_next_center( Point3D p ) { next_center = p; }
+    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; }