X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FMain%2Fviewer.hxx;h=291f4a4913ace6bb19dbb4764d5579caf5002061;hb=2119db35c3f596268e2ee21d3cd8c359a85cd1ed;hp=7c1a5e58d27cb39f38f110bd23bbb64f7c015c09;hpb=efe559ead40d99e8834138b62060080117de317f;p=flightgear.git diff --git a/src/Main/viewer.hxx b/src/Main/viewer.hxx index 7c1a5e58d..291f4a491 100644 --- a/src/Main/viewer.hxx +++ b/src/Main/viewer.hxx @@ -2,6 +2,8 @@ // // Written by Curtis Olson, started August 1997. // overhaul started October 2000. +// partially rewritten by Jim Wilson jim@kelcomaine.com using interface +// by David Megginson March 2002 // // Copyright (C) 1997 - 2000 Curtis L. Olson - curt@flightgear.org // @@ -32,322 +34,366 @@ #include #include +#include #include // plib include #include "fgfs.hxx" - #define FG_FOV_MIN 0.1 #define FG_FOV_MAX 179.9 +enum fgViewType { + FG_LOOKFROM = 0, + FG_LOOKAT = 1 +}; -/** - * Representation of a single viewpoint in the FlightGear world. - */ -class FGViewPoint -{ -public: - FGViewPoint (); - virtual ~FGViewPoint (); +// Define a structure containing view information +class FGViewer : public FGSubsystem { - /** - * Set the geodetic position for the view point. - */ - virtual void setPosition (double lon_deg, double lat_deg, double alt_ft); +public: + enum fgScalingType { // nominal Field Of View actually applies to ... + FG_SCALING_WIDTH, // window width + FG_SCALING_MAX // max(width, height) + // FG_SCALING_G_MEAN, // geometric_mean(width, height) + // FG_SCALING_INDEPENDENT // whole screen + }; - /** - * Get the longitude in degrees. - */ - virtual double getLongitude_deg () const { return _lon_deg; } + // Constructor + FGViewer( fgViewType Type, bool from_model, int from_model_index, + bool at_model, int at_model_index, + double x_offset_m, double y_offset_m, double z_offset_m, + double heading_offset_deg, double pitch_offset_deg, + double roll_offset_deg, double fov_deg, + double target_x_offset_m, double target_y_offset_m, + double target_z_offset_m, double near_m ); - /** - * Get the latitude in degrees. - */ - virtual double getLatitude_deg () const { return _lat_deg; } + // Destructor + virtual ~FGViewer( void ); - /** - * Get the altitude in feet ASL. - */ - virtual double getAltitudeASL_ft () const { return _alt_ft; } + ////////////////////////////////////////////////////////////////////// + // Part 1: standard FGSubsystem implementation. + ////////////////////////////////////////////////////////////////////// - /** - * Get the absolute view position in fgfs coordinates. - */ - virtual const double * getAbsoluteViewPos () const; + virtual void init (); + virtual void bind (); + virtual void unbind (); + void update (double dt); - /** - * Get the relative view position in fgfs coordinates. - * - * The position is relative to the scenery centre. - */ - virtual const float * getRelativeViewPos () const; + ////////////////////////////////////////////////////////////////////// + // Part 2: user settings. + ////////////////////////////////////////////////////////////////////// + virtual fgViewType getType() const { return _type; } + virtual void setType( int type ); + + // Reference geodetic position of view from position... + // These are the actual aircraft position (pilot in + // pilot view, model in model view). + // FIXME: the model view position (ie target positions) + // should be in the model class. + virtual double getLongitude_deg () const { return _lon_deg; } + virtual double getLatitude_deg () const { return _lat_deg; } + virtual double getAltitudeASL_ft () const { return _alt_ft; } + virtual void setLongitude_deg (double lon_deg); + virtual void setLatitude_deg (double lat_deg); + virtual void setAltitude_ft (double alt_ft); + virtual void setPosition (double lon_deg, double lat_deg, double alt_ft); + + // Reference geodetic target position... + virtual double getTargetLongitude_deg () const { return _target_lon_deg; } + virtual double getTargetLatitude_deg () const { return _target_lat_deg; } + virtual double getTargetAltitudeASL_ft () const { return _target_alt_ft; } + virtual void setTargetLongitude_deg (double lon_deg); + virtual void setTargetLatitude_deg (double lat_deg); + virtual void setTargetAltitude_ft (double alt_ft); + virtual void setTargetPosition (double lon_deg, double lat_deg, double alt_ft); + + + + + // Position offsets from reference + // These offsets position they "eye" in the scene according to a given + // location. For example in pilot view they are used to position the + // head inside the aircraft. + // Note that in pilot view these are applied "before" the orientation + // rotations (see below) so that the orientation rotations have the + // effect of the pilot staying in his seat and "looking out" in + // different directions. + // In chase view these are applied "after" the application of the + // orientation rotations listed below. This has the effect of the + // eye moving around and "looking at" the object (model) from + // different angles. + virtual double getXOffset_m () const { return _x_offset_m; } + virtual double getYOffset_m () const { return _y_offset_m; } + virtual double getZOffset_m () const { return _z_offset_m; } + virtual double getTargetXOffset_m () const { return _target_x_offset_m; } + virtual double getTargetYOffset_m () const { return _target_y_offset_m; } + virtual double getTargetZOffset_m () const { return _target_z_offset_m; } + virtual void setXOffset_m (double x_offset_m); + virtual void setYOffset_m (double y_offset_m); + virtual void setZOffset_m (double z_offset_m); + virtual void setTargetXOffset_m (double x_offset_m); + virtual void setTargetYOffset_m (double y_offset_m); + virtual void setTargetZOffset_m (double z_offset_m); + virtual void setPositionOffsets (double x_offset_m, + double y_offset_m, + double z_offset_m); + + + + + // Reference orientation rotations... + // These are rotations that represent the plane attitude effect on + // the view (in Pilot view). IE The view frustrum rotates as the plane + // turns, pitches, and rolls. + // In model view (lookat/chaseview) these end up changing the angle that + // the eye is looking at the ojbect (ie the model). + // FIXME: the FGModel class should have its own version of these so that + // it can generate it's own model rotations. + virtual double getRoll_deg () const { return _roll_deg; } + virtual double getPitch_deg () const {return _pitch_deg; } + virtual double getHeading_deg () const {return _heading_deg; } + virtual void setRoll_deg (double roll_deg); + virtual void setPitch_deg (double pitch_deg); + virtual void setHeading_deg (double heading_deg); + virtual void setOrientation (double roll_deg, double pitch_deg, double heading_deg); + virtual double getTargetRoll_deg () const { return _target_roll_deg; } + virtual double getTargetPitch_deg () const {return _target_pitch_deg; } + virtual double getTargetHeading_deg () const {return _target_heading_deg; } + virtual void setTargetRoll_deg (double roll_deg); + virtual void setTargetPitch_deg (double pitch_deg); + virtual void setTargetHeading_deg (double heading_deg); + virtual void setTargetOrientation (double roll_deg, double pitch_deg, double heading_deg); + + + + + // Orientation offsets rotations from reference orientation. + // Goal settings are for smooth transition from prior + // offset when changing view direction. + // These offsets are in ADDITION to the orientation rotations listed + // above. + // In pilot view they are applied after the position offsets in order to + // give the effect of the pilot looking around. + // In lookat view they are applied before the position offsets so that + // the effect is the eye moving around looking at the object (ie the model) + // from different angles. + virtual double getRollOffset_deg () const { return _roll_offset_deg; } + virtual double getPitchOffset_deg () const { return _pitch_offset_deg; } + virtual double getHeadingOffset_deg () const { return _heading_offset_deg; } + virtual double getGoalRollOffset_deg () const { return _goal_roll_offset_deg; } + virtual double getGoalPitchOffset_deg () const { return _goal_pitch_offset_deg; } + virtual double getGoalHeadingOffset_deg () const {return _goal_heading_offset_deg; } + virtual void setRollOffset_deg (double roll_offset_deg); + virtual void setPitchOffset_deg (double pitch_offset_deg); + virtual void setHeadingOffset_deg (double heading_offset_deg); + virtual void setGoalRollOffset_deg (double goal_roll_offset_deg); + virtual void setGoalPitchOffset_deg (double goal_pitch_offset_deg); + virtual void setGoalHeadingOffset_deg (double goal_heading_offset_deg); + virtual void setOrientationOffsets (double roll_offset_deg, + double heading_offset_deg, + double pitch_offset_deg); - /** - * Get the absolute zero-elevation view position in fgfs coordinates. - */ - virtual const float * getZeroElevViewPos () const; -private: - void recalc () const; + ////////////////////////////////////////////////////////////////////// + // Part 3: output vectors and matrices in FlightGear coordinates. + ////////////////////////////////////////////////////////////////////// - mutable sgdVec3 _absolute_view_pos; - mutable sgVec3 _relative_view_pos; - mutable sgVec3 _zero_elev_view_pos; + // Vectors and positions... + + // Get zero view_pos + virtual float * get_view_pos() {if ( _dirty ) { recalc(); } return _view_pos; } + // Get the absolute view position in fgfs coordinates. + virtual double * get_absolute_view_pos (); + // Get zero elev + virtual float * get_zero_elev() {if ( _dirty ) { recalc(); } return _zero_elev; } + // Get world up vector + virtual float *get_world_up() {if ( _dirty ) { recalc(); } return _world_up; } + // Get the relative (to scenery center) view position in fgfs coordinates. + virtual float * getRelativeViewPos (); + // Get the absolute zero-elevation view position in fgfs coordinates. + virtual float * getZeroElevViewPos (); + // Get surface east vector + virtual float *get_surface_east() { if ( _dirty ) { recalc(); } return _surface_east; } + // Get surface south vector + virtual float *get_surface_south() {if ( _dirty ) { recalc(); } return _surface_south; } + + // Matrices... + virtual const sgVec4 *get_VIEW() { if ( _dirty ) { recalc(); } return VIEW; } + virtual const sgVec4 *get_UP() { if ( _dirty ) { recalc(); } return UP; } - bool _dirty; - double _lon_deg; - double _lat_deg; - double _alt_ft; + ////////////////////////////////////////////////////////////////////// + // Part 4: View and frustrum data setters and getters + ////////////////////////////////////////////////////////////////////// -}; + virtual void set_fov( double fov_deg ) { + _fov_deg = fov_deg; + } + virtual double get_fov() const { return _fov_deg; } + virtual double get_h_fov(); // Get horizontal fov, in degrees. + virtual double get_v_fov(); // Get vertical fov, in degrees. + virtual void set_aspect_ratio( double r ) { + _aspect_ratio = r; + } + virtual double get_aspect_ratio() const { return _aspect_ratio; } -// Define a structure containing view information -class FGViewer { + virtual double getNear_m () const { return _ground_level_nearplane_m; } + inline void setNear_m (double near_m) { + _ground_level_nearplane_m = near_m; + } -public: + ////////////////////////////////////////////////////////////////////// + // Part 5: misc setters and getters + ////////////////////////////////////////////////////////////////////// - enum fgViewType { - FG_RPH = 0, - FG_LOOKAT = 1, - FG_HPR = 2 - }; + inline void set_dirty() { _dirty = true; } + inline void set_clean() { _dirty = false; } + + // return eye location... + virtual FGLocation * getFGLocation () const { return _location; } - enum fgScalingType { // nominal Field Of View actually applies to ... - FG_SCALING_WIDTH, // window width - FG_SCALING_MAX, // max(width, height) - // FG_SCALING_G_MEAN, // geometric_mean(width, height) - // FG_SCALING_INDEPENDENT // whole screen - }; private: - // flag forcing a recalc of derived view parameters - bool dirty; + ////////////////////////////////////////////////////////////////// + // private data // + ////////////////////////////////////////////////////////////////// -protected: + // flag forcing a recalc of derived view parameters + bool _dirty; + + mutable sgdVec3 _absolute_view_pos; + mutable sgVec3 _relative_view_pos; + mutable sgVec3 _zero_elev_view_pos; + + double _lon_deg; + double _lat_deg; + double _alt_ft; + double _target_lon_deg; + double _target_lat_deg; + double _target_alt_ft; + + double _roll_deg; + double _pitch_deg; + double _heading_deg; + double _target_roll_deg; + double _target_pitch_deg; + double _target_heading_deg; + + // Position offsets from FDM origin. The X axis is positive + // out the tail, Y is out the right wing, and Z is positive up. + // distance in meters + double _x_offset_m; + double _y_offset_m; + double _z_offset_m; + + // Target offsets from FDM origin (for "lookat" targets) The X + // axis is positive out the tail, Y is out the right wing, and Z + // is positive up. distance in meters + double _target_x_offset_m; + double _target_y_offset_m; + double _target_z_offset_m; + + + // orientation offsets from reference (_goal* are for smoothed transitions) + double _roll_offset_deg; + double _pitch_offset_deg; + double _heading_offset_deg; + double _goal_roll_offset_deg; + double _goal_pitch_offset_deg; + double _goal_heading_offset_deg; + + // used to set nearplane when at ground level for this view + double _ground_level_nearplane_m; fgViewType _type; - fgScalingType scalingType; + fgScalingType _scaling_type; - FGViewPoint view_point; + // view is looking from a model + bool _from_model; + int _from_model_index; // number of model (for multi model) - // the nominal field of view (angle, in degrees) - double fov; + // view is looking at a model + bool _at_model; + int _at_model_index; // number of model (for multi model) - // ratio of window width and height; height = width * aspect_ratio - double aspect_ratio; + FGLocation * _location; + FGLocation * _target_location; - // 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; - - // the view tilt angles - double view_tilt; - double goal_view_tilt; + // the nominal field of view (angle, in degrees) + double _fov_deg; - // geodetic view position - sgdVec3 geod_view_pos; + // ratio of window width and height; height = width * aspect_ratio + double _aspect_ratio; - // absolute view position in earth coordinates - sgdVec3 abs_view_pos; + bool _reverse_view_offset; // view position in opengl world coordinates (this is the // abs_view_pos translated to scenery.center) - sgVec3 view_pos; - - // radius to sea level from center of the earth (m) - double sea_level_radius; + sgVec3 _view_pos; // cartesion coordinates of current lon/lat if at sea level // 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. - sgVec3 pilot_offset; + sgVec3 _zero_elev; // surface vector heading south - sgVec3 surface_south; + sgVec3 _surface_south; // surface vector heading east (used to unambiguously align sky // with sun) - sgVec3 surface_east; + sgVec3 _surface_east; // world up vector (normal to the plane tangent to the earth's // surface at the spot we are directly above - sgVec3 world_up; + sgVec3 _world_up; - // sg versions of our friendly matrices - sgMat4 VIEW, VIEW_ROT, UP; + // up vector for the view (usually point straight up through the + // top of the aircraft + sgVec3 _view_up; - inline void set_dirty() { dirty = true; } - inline void set_clean() { dirty = false; } - - // Update the view volume, position, and orientation - virtual void update() = 0; - -public: - - // Constructor - FGViewer( void ); - - // Destructor - virtual ~FGViewer( void ); - - virtual void init (); - virtual void bind (); - virtual void unbind (); - virtual void update (int dt); - - ////////////////////////////////////////////////////////////////////// - // setter functions - ////////////////////////////////////////////////////////////////////// - - inline void set_fov( double fov_deg ) { - fov = fov_deg; - } - - inline void set_aspect_ratio( double r ) { - aspect_ratio = r; - } - inline void set_view_offset( double a ) { - set_dirty(); - view_offset = a; - } - inline void inc_view_offset( double amt ) { + // sg versions of our friendly matrices + sgMat4 VIEW, UP; + sgMat4 LOCAL, ATLOCAL, TRANS, LARC_TO_SSG; + + // Transformation matrix for the view direction offset relative to + // the AIRCRAFT matrix + sgMat4 VIEW_OFFSET; + + ////////////////////////////////////////////////////////////////// + // private functions // + ////////////////////////////////////////////////////////////////// + + void recalc (); + void recalcLookFrom(); + void recalcLookAt(); + void copyLocationData(); + void updateFromModelLocation (FGLocation * location); + void updateAtModelLocation (FGLocation * location); + void recalcOurOwnLocation (FGLocation * location, double lon_deg, double lat_deg, double alt_ft, + double roll_deg, double pitch_deg, double heading_deg); + + // add to _heading_offset_deg + inline void incHeadingOffset_deg( double amt ) { set_dirty(); - view_offset += amt; + _heading_offset_deg += amt; } - inline void set_goal_view_offset( double a) { + + // add to _pitch_offset_deg + inline void incPitchOffset_deg( double amt ) { set_dirty(); - goal_view_offset = a; - while ( goal_view_offset < 0.0 ) { - goal_view_offset += SGD_2PI; - } - while ( goal_view_offset > SGD_2PI ) { - goal_view_offset -= SGD_2PI; - } + _pitch_offset_deg += amt; } + inline void set_reverse_view_offset( bool val ) { - reverse_view_offset = val; - } - inline void set_view_tilt( double a ) { - set_dirty(); - view_tilt = a; + _reverse_view_offset = val; } - inline void inc_view_tilt( double amt ) { - set_dirty(); - view_tilt += amt; - } - inline void set_goal_view_tilt( double a) { - set_dirty(); - goal_view_tilt = a; - while ( goal_view_tilt < 0 ) { - goal_view_tilt += 360.0; - } - while ( goal_view_tilt > 360.0 ) { - goal_view_tilt -= 360.0; - } - } - inline void set_geod_view_pos( double lon, double lat, double alt ) { - // data should be in radians and meters asl - set_dirty(); - // cout << "set_geod_view_pos = " << lon << ", " << lat << ", " << alt - // << endl; - sgdSetVec3( geod_view_pos, lon, lat, alt ); - } - inline void set_pilot_offset( float x, float y, float z ) { - set_dirty(); - sgSetVec3( pilot_offset, x, y, z ); - } - inline void set_sea_level_radius( double r ) { - // data should be in meters from the center of the earth - set_dirty(); - sea_level_radius = r; - } - - ////////////////////////////////////////////////////////////////////// - // accessor functions - ////////////////////////////////////////////////////////////////////// - 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_aspect_ratio() const { return aspect_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_view_tilt() const { return view_tilt; } - inline double get_goal_view_tilt() const { return goal_view_tilt; } - inline double *get_geod_view_pos() { return geod_view_pos; } - inline float *get_pilot_offset() { return pilot_offset; } - inline double get_sea_level_radius() const { return sea_level_radius; } - // Get horizontal field of view angle, in degrees. - double get_h_fov(); - // Get vertical field of view angle, in degrees. - double get_v_fov(); - ////////////////////////////////////////////////////////////////////// - // derived values accessor functions - ////////////////////////////////////////////////////////////////////// - inline double *get_abs_view_pos() { - if ( dirty ) { update(); } - return abs_view_pos; - } - inline float *get_view_pos() { - if ( dirty ) { update(); } - return view_pos; - } - inline float *get_zero_elev() { - 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; - } - inline float *get_surface_east() { - if ( dirty ) { update(); } - return surface_east; - } - inline float *get_world_up() { - if ( dirty ) { update(); } - return world_up; - } - inline const sgVec4 *get_VIEW() { - if ( dirty ) { update(); } - return VIEW; - } - inline const sgVec4 *get_VIEW_ROT() { - if ( dirty ) { update(); } - return VIEW_ROT; - } - inline const sgVec4 *get_UP() { - if ( dirty ) { update(); } - return UP; - } }; #endif // _VIEWER_HXX - -