#include <plib/sg.h> // plib include
+#define FG_FOV_MIN 0.1
+#define FG_FOV_MAX 179.9
+
+
// Define a structure containing view information
class FGViewer {
fgViewType _type;
+ // the field of view in the x (width) direction
+ double fov;
+
+ // ratio of x and y fov's; fov(y) = fov(x) * win_ratio
+ double win_ratio;
+
// 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;
// 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.
inline void set_clean() { dirty = false; }
// Update the view volume, position, and orientation
- virtual void update();
+ virtual void update() = 0;
public:
//////////////////////////////////////////////////////////////////////
// setter functions
//////////////////////////////////////////////////////////////////////
+ inline void set_fov( double amount ) { fov = amount; }
+ inline void set_win_ratio( double r ) { win_ratio = r; }
inline void set_view_offset( double a ) {
set_dirty();
view_offset = a;
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
inline int get_type() const { return _type ; }
inline int is_a( int t ) const { return get_type() == t ; }
inline bool is_dirty() const { return dirty; }
+ 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; }
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;