- /sim/model/h-rotation renamed to /sim/model/heading-offset-deg

[flightgear.git] / src / Main / viewer.hxx

diff --git a/src/Main/viewer.hxx b/src/Main/viewer.hxx
index 8475b24c37b6a17fbe9e3adf9a1932f4872d390d..107401a373fa572b73e82251c09718a63caaa104 100644 (file)
--- a/src/Main/viewer.hxx
+++ b/src/Main/viewer.hxx
@@ -68,6 +68,7 @@ protected:
     // the current view offset angle from forward (rotated about the
     // view_up vector)
     double view_offset;
+    bool reverse_view_offset;
 
     // the goal view offset angle  (used for smooth view changes)
     double goal_view_offset;
@@ -89,6 +90,9 @@ protected:
     // translated to scenery.center
     sgVec3 zero_elev;
 
+    // height ASL of the terrain for our current view position
+    // (future?) double ground_elev;
+
     // pilot offset from center of gravity.  The X axis is positive
     // out the tail, Y is out the right wing, and Z is positive up.
     // Distances in meters of course.
@@ -112,7 +116,7 @@ protected:
     inline void set_clean() { dirty = false; }
 
     // Update the view volume, position, and orientation
-    virtual void update();
+    virtual void update() = 0;
 
 public:
 
@@ -138,6 +142,15 @@ public:
     inline void set_goal_view_offset( double a) {
        set_dirty();
        goal_view_offset = a;
+       while ( goal_view_offset < 0 ) {
+           goal_view_offset += 360.0;
+       }
+       while ( goal_view_offset > 360.0 ) {
+           goal_view_offset -= 360.0;
+       }
+    }
+    inline void set_reverse_view_offset( bool val ) {
+       reverse_view_offset = val;
     }
     inline void set_geod_view_pos( double lon, double lat, double alt ) {
        // data should be in radians and meters asl
@@ -165,6 +178,7 @@ public:
     inline double get_fov() const { return fov; }
     inline double get_win_ratio() const { return win_ratio; }
     inline double get_view_offset() const { return view_offset; }
+    inline bool get_reverse_view_offset() const { return reverse_view_offset; }
     inline double get_goal_view_offset() const { return goal_view_offset; }
     inline double *get_geod_view_pos() { return geod_view_pos; }
     inline float *get_pilot_offset() { return pilot_offset; }
@@ -185,6 +199,11 @@ public:
        if ( dirty ) { update(); }
        return zero_elev;
     }
+    // (future?)
+    // inline double get_ground_elev() {
+    //  if ( dirty ) { update(); }
+    // return ground_elev;
+    // }
     inline float *get_surface_south() {
        if ( dirty ) { update(); }
        return surface_south;