//
// Written by Curtis Olson, started April 1998.
//
-// Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu
+// Copyright (C) 1998 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
//
// 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.
//
// $Id$
# include <config.h>
#endif
-#ifdef HAVE_WINDOWS_H
-# include <windows.h>
-#endif
-
-#include <GL/glut.h>
-#include <simgear/xgl.h>
+#include <simgear/compiler.h>
-#include <plib/sg.h> // plib include
-
-#include <simgear/interpolater.hxx>
-#include <simgear/point3d.hxx>
+#include <simgear/props/props.hxx>
+#include <simgear/structure/subsystem_mgr.hxx>
+#include <simgear/math/interpolater.hxx>
// Define a structure containing the global lighting parameters
-class fgLIGHT {
+class FGLight : public SGSubsystem
+{
- // Lighting look up tables (based on sun angle with local horizon)
- fgINTERPTABLE *ambient_tbl;
- fgINTERPTABLE *diffuse_tbl;
- fgINTERPTABLE *sky_tbl;
+private:
-public:
+ /*
+ * Lighting look up tables (based on sun angle with local horizon)
+ */
+ SGInterpTable *_ambient_tbl, *_diffuse_tbl, *_specular_tbl;
+ SGInterpTable *_sky_tbl;
- ///////////////////////////////////////////////////////////
- // position of the sun in various forms
+ /**
+ * position of the sun and moon in various forms
+ */
// in geocentric coordinates
- double sun_lon, sun_gc_lat;
-
- // in cartesian coordiantes
- Point3D fg_sunpos;
+ double _sun_lon, _sun_lat;
+ double _moon_lon, _moon_gc_lat;
// (in view coordinates)
- sgVec4 sun_vec;
+ SGVec4f _sun_vec, _moon_vec;
// inverse (in view coordinates)
- sgVec4 sun_vec_inv;
+ SGVec4f _sun_vec_inv, _moon_vec_inv;
- // the angle between the sun and the local horizontal (in radians)
- double sun_angle;
+ // the angle between the celestial object and the local horizontal
+ // (in radians)
+ double _sun_angle, _moon_angle;
+ double _prev_sun_angle;
// the rotation around our vertical axis of the sun (relative to
// due south with positive numbers going in the counter clockwise
// direction.) This is the direction we'd need to face if we
- // wanted to travel towards the sun.
- double sun_rotation;
-
- ///////////////////////////////////////////////////////////
- // Have the same for the moon. Useful for having some light at night
- // and stuff. I (Durk) also want to use this for adding similar
- // coloring effects to the moon as I did to the sun.
- ///////////////////////////////////////////////////////////
- // position of the moon in various forms
-
- // in geocentric coordinates
- double moon_lon, moon_gc_lat;
+ // wanted to travel towards celestial object.
+ double _sun_rotation, _moon_rotation;
+
+ /**
+ * Derived lighting values
+ */
+
+ // ambient, diffuse and specular component
+ SGVec4f _scene_ambient;
+ SGVec4f _scene_diffuse;
+ SGVec4f _scene_specular;
+ SGVec4f _scene_chrome;
+
+ // clear sky, fog and cloud color
+ SGVec4f _sky_color;
+ SGVec4f _fog_color;
+ SGVec4f _cloud_color;
+
+ // clear sky and fog color adjusted for sunset effects
+ SGVec4f _adj_fog_color;
+ SGVec4f _adj_sky_color;
+
+ // input parameters affected by the weather system
+ float _saturation;
+ float _scattering;
+ float _overcast;
+
+ double _dt_total;
+
+ void update_sky_color ();
+ void update_adj_fog_color ();
+
+ void updateSunPos();
+
+ // properties for chrome light; not a tie because I want to fire
+ // property listeners when the values change.
+ SGPropertyNode_ptr _chromeProps[4];
+public:
- // in cartesian coordiantes
- Point3D fg_moonpos;
+ FGLight ();
+ virtual ~FGLight ();
- // (in view coordinates)
- GLfloat moon_vec[4];
+ virtual void init ();
+ virtual void reinit ();
+ virtual void bind ();
+ virtual void unbind ();
+ virtual void update ( double dt );
- // inverse (in view coordinates)
- GLfloat moon_vec_inv[4];
- // the angle between the moon and the local horizontal (in radians)
- double moon_angle;
+ // Color related functions
- // the rotation around our vertical axis of the moon (relative to
- // due south with positive numbers going in the counter clockwise
- // direction.) This is the direction we'd need to face if we
- // wanted to travel towards the sun.
- double moon_rotation;
+ inline const SGVec4f& scene_ambient () const { return _scene_ambient; }
+ inline const SGVec4f& scene_diffuse () const { return _scene_diffuse; }
+ inline const SGVec4f& scene_specular () const { return _scene_specular; }
+ inline const SGVec4f& scene_chrome () const { return _scene_chrome; }
- ///////////////////////////////////////////////////////////
- // Derived lighting values
+ inline const SGVec4f& sky_color () const { return _sky_color; }
+ inline const SGVec4f& cloud_color () const { return _cloud_color; }
+ inline const SGVec4f& adj_fog_color () const { return _adj_fog_color; }
+ inline const SGVec4f& adj_sky_color () const { return _adj_sky_color; }
- // ambient component
- GLfloat scene_ambient[3];
+ // Sun related functions
- // diffuse component
- GLfloat scene_diffuse[3];
+ inline double get_sun_angle () const { return _sun_angle; }
+ inline void set_sun_angle (double a) { _sun_angle = a; }
- // fog color
- GLfloat fog_color[4];
+ inline double get_sun_rotation () const { return _sun_rotation; }
+ inline void set_sun_rotation (double r) { _sun_rotation = r; }
- // fog color adjusted for sunset effects
- GLfloat adj_fog_color[4];
+ inline double get_sun_lon () const { return _sun_lon; }
+ inline void set_sun_lon (double l) { _sun_lon = l; }
- // clear screen color
- GLfloat sky_color[4];
+ inline double get_sun_lat () const { return _sun_lat; }
+ inline void set_sun_lat (double l) { _sun_lat = l; }
- // Constructor
- fgLIGHT( void );
+ inline SGVec4f& sun_vec () { return _sun_vec; }
+ inline SGVec4f& sun_vec_inv () { return _sun_vec_inv; }
- // initialize lighting tables
- void Init( void );
- // update lighting parameters based on current sun position
- void Update( void);
+ // Moon related functions
- // calculate fog color adjusted for sunrise/sunset effects
- void UpdateAdjFog( void );
+ inline double get_moon_angle () const { return _moon_angle; }
+ inline void set_moon_angle (double a) { _moon_angle = a; }
- // Destructor
- ~fgLIGHT( void );
-};
+ inline double get_moon_rotation () const { return _moon_rotation; }
+ inline void set_moon_rotation (double r) { _moon_rotation = r; }
+ inline double get_moon_lon () const { return _moon_lon; }
+ inline void set_moon_lon (double l) { _moon_lon = l; }
-// Global shared light parameter structure
-extern fgLIGHT cur_light_params;
+ inline double get_moon_gc_lat () const { return _moon_gc_lat; }
+ inline void set_moon_gc_lat (double l) { _moon_gc_lat = l; }
+ inline const SGVec4f& moon_vec () const { return _moon_vec; }
+ inline const SGVec4f& moon_vec_inv () const { return _moon_vec_inv; }
+};
#endif // _LIGHT_HXX
+
projects / flightgear.git / blobdiff