// $Id$
+#include <Aircraft/aircraft.hxx>
+#include <Main/bfi.hxx>
#include <Navaids/ilslist.hxx>
#include <Navaids/navlist.hxx>
+#include <Time/event.hxx>
#include "radiostack.hxx"
+/**
+ * Boy, this is ugly! Make the VOR range vary by altitude difference.
+ */
+static inline double
+kludgeRange (double stationElev, double aircraftElev, double nominalRange)
+{
+ // Assume that the nominal range (usually
+ // 50nm) applies at a 5,000 ft difference.
+ // Just a wild guess!
+ double factor = ((aircraftElev*METER_TO_FEET) - stationElev) / 1000.0;
+ double range = fabs(nominalRange * factor);
+
+ // Clamp the range to keep it sane; for
+ // now, never less than 25% or more than
+ // 500% of nominal range.
+ if (range < nominalRange/4.0) {
+ range = nominalRange/4.0;
+ } else if (range > nominalRange*5.0) {
+ range = nominalRange*5.0;
+ }
+
+ return range;
+}
+
FGRadioStack *current_radiostack;
+// periodic radio station search wrapper
+static void fgRadioSearch( void ) {
+ current_radiostack->search();
+}
+
// Constructor
FGRadioStack::FGRadioStack() {
+ nav1_radial = 0.0;
+ nav1_dme_dist = 0.0;
+ nav2_radial = 0.0;
+ nav2_dme_dist = 0.0;
need_update = true;
+ longitudeVal = fgGetValue("/position/longitude");
+ latitudeVal = fgGetValue("/position/latitude");
+ altitudeVal = fgGetValue("/position/altitude");
}
// Destructor
-FGRadioStack::~FGRadioStack() {
+FGRadioStack::~FGRadioStack()
+{
+ unbind(); // FIXME: should be called externally
}
-// Update nav/adf radios based on current postition
-void FGRadioStack::update( double lon, double lat, double elev ) {
+void
+FGRadioStack::init ()
+{
+ search();
+ update();
+
+ // Search radio database once per second
+ global_events.Register( "fgRadioSearch()", fgRadioSearch,
+ fgEVENT::FG_EVENT_READY, 1000);
+}
+
+void
+FGRadioStack::bind ()
+{
+ // User inputs
+ fgTie("/radios/nav1/frequencies/selected", this,
+ &FGRadioStack::get_nav1_freq, &FGRadioStack::set_nav1_freq);
+ fgTie("/radios/nav1/frequencies/standby", this,
+ &FGRadioStack::get_nav1_alt_freq, &FGRadioStack::set_nav1_alt_freq);
+ fgTie("/radios/nav1/radials/selected", this,
+ &FGRadioStack::get_nav1_sel_radial,
+ &FGRadioStack::set_nav1_sel_radial);
+
+ // Radio outputs
+ fgTie("/radios/nav1/radials/actual", this, &FGRadioStack::get_nav1_radial);
+ fgTie("/radios/nav1/to-flag", this, &FGRadioStack::get_nav1_to_flag);
+ fgTie("/radios/nav1/from-flag", this, &FGRadioStack::get_nav1_from_flag);
+ fgTie("/radios/nav1/in-range", this, &FGRadioStack::get_nav1_inrange);
+ fgTie("/radios/nav1/dme/distance", this, &FGRadioStack::get_nav1_dme_dist);
+ fgTie("/radios/nav1/dme/in-range", this,
+ &FGRadioStack::get_nav1_dme_inrange);
+ fgTie("/radios/nav1/heading-needle-deflection", this,
+ &FGRadioStack::get_nav1_heading_needle_deflection);
+ fgTie("/radios/nav1/gs-needle-deflection", this,
+ &FGRadioStack::get_nav1_gs_needle_deflection);
+
+ // User inputs
+ fgTie("/radios/nav2/frequencies/selected", this,
+ &FGRadioStack::get_nav2_freq, &FGRadioStack::set_nav2_freq);
+ fgTie("/radios/nav2/frequencies/standby", this,
+ &FGRadioStack::get_nav2_alt_freq, &FGRadioStack::set_nav2_alt_freq);
+ fgTie("/radios/nav2/radials/selected", this,
+ &FGRadioStack::get_nav2_sel_radial,
+ &FGRadioStack::set_nav2_sel_radial);
+
+ // Radio outputs
+ fgTie("/radios/nav2/radials/actual", this, &FGRadioStack::get_nav2_radial);
+ fgTie("/radios/nav2/to-flag", this, &FGRadioStack::get_nav2_to_flag);
+ fgTie("/radios/nav2/from-flag", this, &FGRadioStack::get_nav2_from_flag);
+ fgTie("/radios/nav2/in-range", this, &FGRadioStack::get_nav2_inrange);
+ fgTie("/radios/nav2/dme/distance", this, &FGRadioStack::get_nav2_dme_dist);
+ fgTie("/radios/nav2/dme/in-range", this,
+ &FGRadioStack::get_nav2_dme_inrange);
+ fgTie("/radios/nav2/heading-needle-deflection", this,
+ &FGRadioStack::get_nav2_heading_needle_deflection);
+ fgTie("/radios/nav2/gs-needle-deflection", this,
+ &FGRadioStack::get_nav2_gs_needle_deflection);
+
+ // User inputs
+ fgTie("/radios/adf/frequencies/selected", this,
+ &FGRadioStack::get_adf_freq, &FGRadioStack::set_adf_freq);
+ fgTie("/radios/adf/frequencies/standby", this,
+ &FGRadioStack::get_adf_alt_freq, &FGRadioStack::set_adf_alt_freq);
+ fgTie("/radios/adf/rotation", this,
+ &FGRadioStack::get_adf_rotation, &FGRadioStack::set_adf_rotation);
+}
+
+void
+FGRadioStack::unbind ()
+{
+ fgUntie("/radios/nav1/frequencies/selected");
+ fgUntie("/radios/nav1/frequencies/standby");
+ fgUntie("/radios/nav1/radials/actual");
+ fgUntie("/radios/nav1/radials/selected");
+ fgUntie("/radios/nav1/to-flag");
+ fgUntie("/radios/nav1/from-flag");
+ fgUntie("/radios/nav1/in-range");
+ fgUntie("/radios/nav1/dme/distance");
+ fgUntie("/radios/nav1/dme/in-range");
+ fgUntie("/radios/nav1/heading-needle-deflection");
+ fgUntie("/radios/nav1/gs-needle-deflection");
+
+ fgUntie("/radios/nav2/frequencies/selected");
+ fgUntie("/radios/nav2/frequencies/standby");
+ fgUntie("/radios/nav2/radials/actual");
+ fgUntie("/radios/nav2/radials/selected");
+ fgUntie("/radios/nav2/to-flag");
+ fgUntie("/radios/nav2/from-flag");
+ fgUntie("/radios/nav2/in-range");
+ fgUntie("/radios/nav2/dme/distance");
+ fgUntie("/radios/nav2/dme/in-range");
+ fgUntie("/radios/nav2/heading-needle-deflection");
+ fgUntie("/radios/nav2/gs-needle-deflection");
+
+ fgUntie("/radios/adf/frequencies/selected");
+ fgUntie("/radios/adf/frequencies/standby");
+ fgUntie("/radios/adf/rotation");
+}
+
+// Search the database for the current frequencies given current location
+void
+FGRadioStack::update()
+{
+ double lon = longitudeVal->getDoubleValue() * DEG_TO_RAD;
+ double lat = latitudeVal->getDoubleValue() * DEG_TO_RAD;
+ double elev = altitudeVal->getDoubleValue() * FEET_TO_METER;
+
need_update = false;
+ Point3D aircraft = sgGeodToCart( Point3D( lon, lat, elev ) );
+ Point3D station;
+ double az1, az2, s;
+
+ if ( nav1_valid ) {
+ station = Point3D( nav1_x, nav1_y, nav1_z );
+ nav1_loc_dist = aircraft.distance3D( station );
+
+ if ( nav1_has_dme ) {
+ // staightline distance
+ station = Point3D( nav1_dme_x, nav1_dme_y, nav1_dme_z );
+ nav1_dme_dist = aircraft.distance3D( station );
+ } else {
+ nav1_dme_dist = 0.0;
+ }
+
+ if ( nav1_has_gs ) {
+ station = Point3D( nav1_gs_x, nav1_gs_y, nav1_gs_z );
+ nav1_gs_dist = aircraft.distance3D( station );
+ } else {
+ nav1_gs_dist = 0.0;
+ }
+
+ if ( nav1_loc_dist < nav1_effective_range * NM_TO_METER ) {
+ nav1_inrange = true;
+
+ // wgs84 heading
+ geo_inverse_wgs_84( elev, lat * RAD_TO_DEG, lon * RAD_TO_DEG,
+ nav1_loclat, nav1_loclon,
+ &az1, &az2, &s );
+ // cout << "az1 = " << az1 << " magvar = " << nav1_magvar << endl;
+ nav1_heading = az1 - nav1_magvar;
+ // Alex: nav1_heading = - (az1 - FGBFI::getMagVar() / RAD_TO_DEG);
+
+ // cout << " heading = " << nav1_heading
+ // << " dist = " << nav1_dist << endl;
+ } else {
+ nav1_inrange = false;
+ }
+
+ if ( nav1_loc ) {
+ } else {
+ nav1_radial = nav1_sel_radial;
+ }
+ } else {
+ nav1_inrange = false;
+ nav1_dme_dist = 0.0;
+ // cout << "not picking up vor. :-(" << endl;
+ }
+
+ if ( nav2_valid ) {
+ station = Point3D( nav2_x, nav2_y, nav2_z );
+ nav2_loc_dist = aircraft.distance3D( station );
+
+ if ( nav2_has_dme ) {
+ // staightline distance
+ station = Point3D( nav2_dme_x, nav2_dme_y, nav2_dme_z );
+ nav2_dme_dist = aircraft.distance3D( station );
+ } else {
+ nav2_dme_dist = 0.0;
+ }
+
+ if ( nav2_has_gs ) {
+ station = Point3D( nav2_gs_x, nav2_gs_y, nav2_gs_z );
+ nav2_gs_dist = aircraft.distance3D( station );
+ } else {
+ nav2_gs_dist = 0.0;
+ }
+
+ if ( nav2_loc_dist < nav2_effective_range * NM_TO_METER ) {
+ nav2_inrange = true;
+
+ // wgs84 heading
+ geo_inverse_wgs_84( elev, lat * RAD_TO_DEG, lon * RAD_TO_DEG,
+ nav2_loclat, nav2_loclon,
+ &az1, &az2, &s );
+ nav2_heading = az1 - nav2_magvar;
+ // Alex: nav2_heading = - (az1 - FGBFI::getMagVar() / RAD_TO_DEG);
+
+ // cout << " heading = " << nav2_heading
+ // << " dist = " << nav2_dist << endl;
+ } else {
+ nav2_inrange = false;
+ }
+
+ if ( !nav2_loc ) {
+ nav2_radial = nav2_sel_radial;
+ }
+ } else {
+ nav2_inrange = false;
+ // cout << "not picking up vor. :-(" << endl;
+ }
+
+ // adf
+ if ( adf_valid ) {
+ // staightline distance
+ station = Point3D( adf_x, adf_y, adf_z );
+ adf_dist = aircraft.distance3D( station );
+
+ if ( adf_dist < adf_effective_range * NM_TO_METER ) {
+ adf_inrange = true;
+
+ // wgs84 heading
+ geo_inverse_wgs_84( elev, lat * RAD_TO_DEG, lon * RAD_TO_DEG,
+ adf_lat, adf_lon,
+ &az1, &az2, &s );
+ adf_heading = az1;
+
+ // cout << " heading = " << nav2_heading
+ // << " dist = " << nav2_dist << endl;
+ } else {
+ adf_inrange = false;
+ }
+ } else {
+ adf_inrange = false;
+ }
+}
+
+
+// Update current nav/adf radio stations based on current postition
+void FGRadioStack::search ()
+{
+ double lon = longitudeVal->getDoubleValue() * DEG_TO_RAD;
+ double lat = latitudeVal->getDoubleValue() * DEG_TO_RAD;
+ double elev = altitudeVal->getDoubleValue() * FEET_TO_METER;
+
// nav1
FGILS ils;
- if ( current_ilslist->query( lon, lat, elev, nav1_freq,
- &ils, &nav1_heading, &nav1_dist) ) {
- nav1_inrange = true;
- nav1_lon = ils.get_loclon();
- nav1_lat = ils.get_loclat();
+ FGNav nav;
+
+ if ( current_ilslist->query( lon, lat, elev, nav1_freq, &ils ) ) {
+ nav1_valid = true;
+ nav1_loc = true;
+ nav1_has_dme = ils.get_has_dme();
+ nav1_has_gs = ils.get_has_gs();
+
+ nav1_loclon = ils.get_loclon();
+ nav1_loclat = ils.get_loclat();
+ nav1_gslon = ils.get_gslon();
+ nav1_gslat = ils.get_gslat();
+ nav1_dmelon = ils.get_dmelon();
+ nav1_dmelat = ils.get_dmelat();
nav1_elev = ils.get_gselev();
+ nav1_magvar = 0;
+ nav1_effective_range = FG_ILS_DEFAULT_RANGE;
nav1_target_gs = ils.get_gsangle();
nav1_radial = ils.get_locheading();
- // cout << "Found a vor station in range" << endl;
+ while ( nav1_radial < 0.0 ) { nav1_radial += 360.0; }
+ while ( nav1_radial > 360.0 ) { nav1_radial -= 360.0; }
+ nav1_x = ils.get_x();
+ nav1_y = ils.get_y();
+ nav1_z = ils.get_z();
+ nav1_gs_x = ils.get_gs_x();
+ nav1_gs_y = ils.get_gs_y();
+ nav1_gs_z = ils.get_gs_z();
+ nav1_dme_x = ils.get_dme_x();
+ nav1_dme_y = ils.get_dme_y();
+ nav1_dme_z = ils.get_dme_z();
+ // cout << "Found an ils station in range" << endl;
// cout << " id = " << ils.get_locident() << endl;
- // cout << " heading = " << nav1_heading
- // << " dist = " << nav1_dist << endl;
+ } else if ( current_navlist->query( lon, lat, elev, nav1_freq, &nav ) ) {
+ nav1_valid = true;
+ nav1_loc = false;
+ nav1_has_dme = nav.get_has_dme();
+ nav1_has_gs = false;
+ nav1_loclon = nav.get_lon();
+ nav1_loclat = nav.get_lat();
+ nav1_elev = nav.get_elev();
+ nav1_magvar = nav.get_magvar();
+ nav1_effective_range = kludgeRange(nav1_elev, elev, nav.get_range());
+ nav1_target_gs = 0.0;
+ nav1_radial = nav1_sel_radial;
+ nav1_x = nav1_dme_x = nav.get_x();
+ nav1_y = nav1_dme_y = nav.get_y();
+ nav1_z = nav1_dme_z = nav.get_z();
+ // cout << "Found a vor station in range" << endl;
+ // cout << " id = " << nav.get_ident() << endl;
} else {
- nav1_inrange = false;
- cout << "not picking up vor. :-(" << endl;
+ nav1_valid = false;
+ nav1_radial = 0;
+ nav1_dme_dist = 0;
+ // cout << "not picking up vor1. :-(" << endl;
}
- // nav1
- FGNav nav;
- if ( current_navlist->query( lon, lat, elev, nav2_freq,
- &nav, &nav2_heading, &nav2_dist) ) {
- nav2_inrange = true;
- nav2_lon = nav.get_lon();
- nav2_lat = nav.get_lat();
+ if ( current_ilslist->query( lon, lat, elev, nav2_freq, &ils ) ) {
+ nav2_valid = true;
+ nav2_loc = true;
+ nav2_has_dme = ils.get_has_dme();
+ nav2_has_gs = ils.get_has_gs();
+
+ nav2_loclon = ils.get_loclon();
+ nav2_loclat = ils.get_loclat();
+ nav2_elev = ils.get_gselev();
+ nav2_magvar = 0;
+ nav2_effective_range = FG_ILS_DEFAULT_RANGE;
+ nav2_target_gs = ils.get_gsangle();
+ nav2_radial = ils.get_locheading();
+ while ( nav2_radial < 0.0 ) { nav2_radial += 360.0; }
+ while ( nav2_radial > 360.0 ) { nav2_radial -= 360.0; }
+ nav2_x = ils.get_x();
+ nav2_y = ils.get_y();
+ nav2_z = ils.get_z();
+ nav2_gs_x = ils.get_gs_x();
+ nav2_gs_y = ils.get_gs_y();
+ nav2_gs_z = ils.get_gs_z();
+ nav2_dme_x = ils.get_dme_x();
+ nav2_dme_y = ils.get_dme_y();
+ nav2_dme_z = ils.get_dme_z();
+ // cout << "Found an ils station in range" << endl;
+ // cout << " id = " << ils.get_locident() << endl;
+ } else if ( current_navlist->query( lon, lat, elev, nav2_freq, &nav ) ) {
+ nav2_valid = true;
+ nav2_loc = false;
+ nav2_has_dme = nav.get_has_dme();
+ nav2_has_dme = false;
+ nav2_loclon = nav.get_lon();
+ nav2_loclat = nav.get_lat();
nav2_elev = nav.get_elev();
+ nav2_magvar = nav.get_magvar();
+ nav2_effective_range = kludgeRange(nav2_elev, elev, nav.get_range());
+ nav2_target_gs = 0.0;
+ nav2_radial = nav2_sel_radial;
+ nav2_x = nav2_dme_x = nav.get_x();
+ nav2_y = nav2_dme_y = nav.get_y();
+ nav2_z = nav2_dme_z = nav.get_z();
// cout << "Found a vor station in range" << endl;
// cout << " id = " << nav.get_ident() << endl;
- // cout << " heading = " << nav2_heading
- // << " dist = " << nav2_dist << endl;
} else {
- nav2_inrange = false;
- cout << "not picking up vor. :-(" << endl;
+ nav2_valid = false;
+ nav2_radial = 0;
+ nav2_dme_dist = 0;
+ // cout << "not picking up vor2. :-(" << endl;
}
// adf
- double junk;
- if ( current_navlist->query( lon, lat, elev, adf_freq,
- &nav, &adf_heading, &junk) ) {
- adf_inrange = true;
+ if ( current_navlist->query( lon, lat, elev, adf_freq, &nav ) ) {
+ adf_valid = true;
+
adf_lon = nav.get_lon();
adf_lat = nav.get_lat();
adf_elev = nav.get_elev();
+ adf_effective_range = kludgeRange(adf_elev, elev, nav.get_range());
+ adf_x = nav.get_x();
+ adf_y = nav.get_y();
+ adf_z = nav.get_z();
// cout << "Found an adf station in range" << endl;
// cout << " id = " << nav.get_ident() << endl;
- // cout << " heading = " << adf_heading
- // << " dist = " << junk << endl;
} else {
- adf_inrange = false;
- cout << "not picking up adf. :-(" << endl;
+ adf_valid = false;
+ // cout << "not picking up adf. :-(" << endl;
+ }
+}
+
+
+// return the amount of heading needle deflection, returns a value
+// clamped to the range of ( -10 , 10 )
+double FGRadioStack::get_nav1_heading_needle_deflection() const {
+ double r;
+
+ if ( nav1_inrange ) {
+ r = nav1_heading - nav1_radial;
+ // cout << "Radial = " << nav1_radial
+ // << " Bearing = " << nav1_heading << endl;
+
+ while ( r > 180.0 ) { r -= 360.0;}
+ while ( r < -180.0 ) { r += 360.0;}
+ if ( fabs(r) > 90.0 ) {
+ r = ( r<0.0 ? -r-180.0 : -r+180.0 );
+ if ( nav1_loc ) {
+ r = -r;
+ }
+ }
+
+ // According to Robin Peel, the ILS is 4x more sensitive than a vor
+ if ( nav1_loc ) { r *= 4.0; }
+ if ( r < -10.0 ) { r = -10.0; }
+ if ( r > 10.0 ) { r = 10.0; }
+ } else {
+ r = 0.0;
}
+
+ return r;
+}
+
+// return the amount of heading needle deflection, returns a value
+// clamped to the range of ( -10 , 10 )
+double FGRadioStack::get_nav2_heading_needle_deflection() const {
+ double r;
+
+ if ( nav2_inrange ) {
+ r = nav2_heading - nav2_radial;
+ // cout << "Radial = " << nav2_radial
+ // << " Bearing = " << nav2_heading << endl;
+
+ while (r> 180.0) r-=360.0;
+ while (r<-180.0) r+=360.0;
+ if ( fabs(r) > 90.0 )
+ r = ( r<0.0 ? -r-180.0 : -r+180.0 );
+ // According to Robin Peel, the ILS is 4x more sensitive than a vor
+ if ( nav2_loc ) r *= 4.0;
+ if ( r < -10.0 ) r = -10.0;
+ if ( r > 10.0 ) r = 10.0;
+ } else {
+ r = 0.0;
+ }
+
+ return r;
+}
+
+// return the amount of glide slope needle deflection (.i.e. the
+// number of degrees we are off the glide slope * 5.0
+double FGRadioStack::get_nav1_gs_needle_deflection() const {
+ if ( nav1_inrange && nav1_has_gs ) {
+ double x = nav1_gs_dist;
+ double y = (FGBFI::getAltitude() - nav1_elev) * FEET_TO_METER;
+ double angle = atan2( y, x ) * RAD_TO_DEG;
+ return (nav1_target_gs - angle) * 5.0;
+ } else {
+ return 0.0;
+ }
+}
+
+
+// return the amount of glide slope needle deflection (.i.e. the
+// number of degrees we are off the glide slope * 5.0
+double FGRadioStack::get_nav2_gs_needle_deflection() const {
+ if ( nav2_inrange && nav2_has_gs ) {
+ double x = nav2_gs_dist;
+ double y = (FGBFI::getAltitude() - nav2_elev) * FEET_TO_METER;
+ double angle = atan2( y, x ) * RAD_TO_DEG;
+ return (nav2_target_gs - angle) * 5.0;
+ } else {
+ return 0.0;
+ }
+}
+
+
+/**
+ * Return true if the NAV1 TO flag should be active.
+ */
+bool
+FGRadioStack::get_nav1_to_flag () const
+{
+ if (nav1_inrange) {
+ double offset = fabs(nav1_heading - nav1_radial);
+ if (nav1_loc)
+ return true;
+ else
+ return (offset <= 90.0 || offset >= 270.0);
+ } else {
+ return false;
+ }
+}
+
+
+/**
+ * Return true if the NAV1 FROM flag should be active.
+ */
+bool
+FGRadioStack::get_nav1_from_flag () const
+{
+ if (nav1_inrange) {
+ double offset = fabs(nav1_heading - nav1_radial);
+ if (nav1_loc)
+ return false;
+ else
+ return (offset > 90.0 && offset < 270.0);
+ } else {
+ return false;
+ }
+}
+
+
+/**
+ * Return true if the NAV2 TO flag should be active.
+ */
+bool
+FGRadioStack::get_nav2_to_flag () const
+{
+ if (nav2_inrange) {
+ double offset = fabs(nav2_heading - nav2_radial);
+ if (nav2_loc)
+ return true;
+ else
+ return (offset <= 90.0 || offset >= 270.0);
+ } else {
+ return false;
+ }
+}
+
+
+/**
+ * Return true if the NAV2 FROM flag should be active.
+ */
+bool
+FGRadioStack::get_nav2_from_flag () const
+{
+ if (nav2_inrange) {
+ double offset = fabs(nav2_heading - nav2_radial);
+ if (nav2_loc)
+ return false;
+ else
+ return (offset > 90.0 && offset < 270.0);
+ } else {
+ return false;
+ }
}
projects / flightgear.git / blobdiff