// $Id$
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdio.h> // snprintf
+
+#include <simgear/compiler.h>
+#include <simgear/math/sg_random.h>
+
+#include <Aircraft/aircraft.hxx>
#include <Navaids/ilslist.hxx>
+#include <Navaids/mkrbeacons.hxx>
#include <Navaids/navlist.hxx>
+#include <Time/FGEventMgr.hxx>
#include "radiostack.hxx"
+#include <string>
+SG_USING_STD(string);
+
FGRadioStack *current_radiostack;
+/**
+ * Boy, this is ugly! Make the VOR range vary by altitude difference.
+ */
+static 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*SG_METER_TO_FEET) - stationElev) / 5000.0;
+ 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;
+}
+
+
// Constructor
-FGRadioStack::FGRadioStack() {
- need_update = true;
+FGRadioStack::FGRadioStack() :
+ lon_node(fgGetNode("/position/longitude-deg", true)),
+ lat_node(fgGetNode("/position/latitude-deg", true)),
+ alt_node(fgGetNode("/position/altitude-ft", true)),
+ need_update(true),
+ dme_freq(0.0),
+ dme_dist(0.0),
+ dme_prev_dist(0.0),
+ dme_spd(0.0),
+ dme_ete(0.0),
+ outer_blink(false),
+ middle_blink(false),
+ inner_blink(false)
+{
+ SGPath path( globals->get_fg_root() );
+ SGPath term = path;
+ term.append( "Navaids/range.term" );
+ SGPath low = path;
+ low.append( "Navaids/range.low" );
+ SGPath high = path;
+ high.append( "Navaids/range.high" );
+
+ term_tbl = new SGInterpTable( term.str() );
+ low_tbl = new SGInterpTable( low.str() );
+ high_tbl = new SGInterpTable( high.str() );
+ dme_last_time.stamp();
}
// Destructor
-FGRadioStack::~FGRadioStack() {
+FGRadioStack::~FGRadioStack()
+{
+ navcom1.unbind();
+ navcom2.unbind();
+ adf.unbind();
+ xponder.unbind();
+ unbind(); // FIXME: should be called externally
+
+ delete term_tbl;
+ delete low_tbl;
+ delete high_tbl;
+}
+
+
+void
+FGRadioStack::init ()
+{
+ navcom1.set_bind_index( 0 );
+ navcom1.init();
+
+ navcom2.set_bind_index( 1 );
+ navcom2.init();
+
+ adf.init();
+ xponder.init();
+
+ morse.init();
+ beacon.init();
+ blink.stamp();
+
+ search();
+ navcom1.search();
+ navcom2.search();
+ adf.search();
+ xponder.search();
+
+ update(0); // FIXME: use dt
+ navcom1.update(0);
+ navcom2.update(0);
+ adf.update(0);
+ xponder.update(0);
+
+ // Search radio database once per second
+ global_events.Register( "fgRadioSearch()",
+ current_radiostack, &FGRadioStack::search,
+ 1000 );
+}
+
+void
+FGRadioStack::bind ()
+{
+
+ // User inputs
+ fgTie("/radios/dme/frequencies/selected-khz", this,
+ &FGRadioStack::get_dme_freq, &FGRadioStack::set_dme_freq);
+
+ // Radio outputs
+ fgTie("/radios/dme/in-range", this, &FGRadioStack::get_dme_inrange);
+
+ fgTie("/radios/dme/distance-nm", this, &FGRadioStack::get_dme_dist);
+
+ fgTie("/radios/dme/speed-kt", this, &FGRadioStack::get_dme_spd);
+
+ fgTie("/radios/dme/ete-min", this, &FGRadioStack::get_dme_ete);
+
+ fgTie("/radios/marker-beacon/inner", this,
+ &FGRadioStack::get_inner_blink);
+
+ fgTie("/radios/marker-beacon/middle", this,
+ &FGRadioStack::get_middle_blink);
+
+ fgTie("/radios/marker-beacon/outer", this,
+ &FGRadioStack::get_outer_blink);
+
+ navcom1.set_bind_index( 0 );
+ navcom1.bind();
+ navcom2.set_bind_index( 1 );
+ navcom2.bind();
+ adf.bind();
+ xponder.bind();
+}
+
+void
+FGRadioStack::unbind ()
+{
+ fgUntie("/radios/dme/frequencies/selected-khz");
+
+ // Radio outputs
+ fgUntie("/radios/dme/in-range");
+ fgUntie("/radios/dme/distance-nm");
+ fgUntie("/radios/dme/speed-kt");
+ fgUntie("/radios/dme/ete-min");
+
+ fgUntie("/radios/marker-beacon/inner");
+ fgUntie("/radios/marker-beacon/middle");
+ fgUntie("/radios/marker-beacon/outer");
+
+ navcom1.unbind();
+ navcom2.unbind();
+ adf.unbind();
+ xponder.unbind();
}
-// Update nav/adf radios based on current postition
-void FGRadioStack::update( double lon, double lat, double elev ) {
+// Update the various nav values based on position and valid tuned in navs
+void
+FGRadioStack::update(double dt)
+{
+ double lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
+ double lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
+ double elev = alt_node->getDoubleValue() * SG_FEET_TO_METER;
+
need_update = false;
- // 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();
- nav1_elev = ils.get_gselev();
- cout << "Found a vor station in range" << endl;
- cout << " id = " << ils.get_locident() << endl;
- cout << " heading = " << nav1_heading
- << " dist = " << nav1_dist << endl;
+ Point3D aircraft = sgGeodToCart( Point3D( lon, lat, elev ) );
+ Point3D station;
+
+ navcom1.update( dt );
+ navcom2.update( dt );
+
+ ////////////////////////////////////////////////////////////////////////
+ // DME.
+ ////////////////////////////////////////////////////////////////////////
+
+ if ( dme_valid ) {
+ station = Point3D( dme_x, dme_y, dme_z );
+ dme_dist = aircraft.distance3D( station ) * SG_METER_TO_NM;
+ dme_effective_range = kludgeRange(dme_elev, elev, dme_range);
+ if (dme_dist < dme_effective_range * SG_NM_TO_METER) {
+ dme_inrange = true;
+ } else if (dme_dist < 2 * dme_effective_range * SG_NM_TO_METER) {
+ dme_inrange = sg_random() <
+ (2 * dme_effective_range * SG_NM_TO_METER - dme_dist) /
+ (dme_effective_range * SG_NM_TO_METER);
+ } else {
+ dme_inrange = false;
+ }
+ if ( dme_inrange ) {
+ SGTimeStamp current_time;
+ station = Point3D( dme_x, dme_y, dme_z );
+ dme_dist = aircraft.distance3D( station ) * SG_METER_TO_NM;
+ current_time.stamp();
+ long dMs = (current_time - dme_last_time) / 1000;
+ // Update every second
+ if (dMs >= 1000) {
+ double dDist = dme_dist - dme_prev_dist;
+ dme_spd = fabs((dDist/dMs) * 3600000);
+ // FIXME: the panel should be able to
+ // handle this!!!
+ if (dme_spd > 999.0)
+ dme_spd = 999.0;
+ dme_ete = fabs((dme_dist/dme_spd) * 60.0);
+ // FIXME: the panel should be able to
+ // handle this!!!
+ if (dme_ete > 99.0)
+ dme_ete = 99.0;
+ dme_prev_dist = dme_dist;
+ dme_last_time.stamp();
+ }
+ }
} else {
- nav1_inrange = false;
- cout << "not picking up vor. :-(" << endl;
+ dme_inrange = false;
+ dme_dist = 0.0;
+ dme_prev_dist = 0.0;
+ dme_spd = 0.0;
+ dme_ete = 0.0;
}
- // 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();
- nav2_elev = nav.get_elev();
- cout << "Found a vor station in range" << endl;
- cout << " id = " << nav.get_ident() << endl;
- cout << " heading = " << nav2_heading
- << " dist = " << nav2_dist << endl;
+ // marker beacon blinking
+ bool light_on = ( outer_blink || middle_blink || inner_blink );
+ SGTimeStamp current;
+ current.stamp();
+
+ if ( light_on && (current - blink > 400000) ) {
+ light_on = false;
+ blink.stamp();
+ } else if ( !light_on && (current - blink > 100000) ) {
+ light_on = true;
+ blink.stamp();
+ }
+
+ if ( outer_marker ) {
+ outer_blink = light_on;
} else {
- nav2_inrange = false;
- cout << "not picking up vor. :-(" << endl;
+ outer_blink = false;
}
- // adf
- double junk;
- if ( current_navlist->query( lon, lat, elev, adf_freq,
- &nav, &adf_heading, &junk) ) {
- adf_inrange = true;
- adf_lon = nav.get_lon();
- adf_lat = nav.get_lat();
- adf_elev = nav.get_elev();
- cout << "Found an adf station in range" << endl;
- cout << " id = " << nav.get_ident() << endl;
- cout << " heading = " << adf_heading
- << " dist = " << junk << endl;
+ if ( middle_marker ) {
+ middle_blink = light_on;
} else {
- adf_inrange = false;
- cout << "not picking up adf. :-(" << endl;
+ middle_blink = false;
}
+
+ if ( inner_marker ) {
+ inner_blink = light_on;
+ } else {
+ inner_blink = false;
+ }
+
+ // cout << outer_blink << " " << middle_blink << " " << inner_blink << endl;
+
+ adf.update( dt );
+ xponder.update( dt );
}
+
+// Update current nav/adf radio stations based on current postition
+void FGRadioStack::search()
+{
+ static FGMkrBeacon::fgMkrBeacType last_beacon = FGMkrBeacon::NOBEACON;
+
+ double lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
+ double lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
+ double elev = alt_node->getDoubleValue() * SG_FEET_TO_METER;
+
+ // FIXME: the panel should handle this
+ // don't worry about overhead for now,
+ // since this is handled only periodically
+ int dme_switch_pos = fgGetInt("/radios/dme/switch-position");
+ if ( dme_switch_pos == 1 && navcom1.has_power() ) {
+ if ( dme_freq != navcom1.get_nav_freq() ) {
+ dme_freq = navcom1.get_nav_freq();
+ need_update = true;
+ }
+ } else if ( dme_switch_pos == 3 && navcom2.has_power() ) {
+ if ( dme_freq != navcom2.get_nav_freq() ) {
+ dme_freq = navcom2.get_nav_freq();
+ need_update = true;
+ }
+ } else {
+ dme_freq = 0;
+ dme_inrange = false;
+ }
+
+ FGILS ils;
+ FGNav nav;
+
+ navcom1.search();
+ navcom2.search();
+
+ ////////////////////////////////////////////////////////////////////////
+ // DME
+ ////////////////////////////////////////////////////////////////////////
+
+ if ( current_ilslist->query( lon, lat, elev, dme_freq, &ils ) ) {
+ if (ils.get_has_dme()) {
+ dme_valid = true;
+ dme_lon = ils.get_loclon();
+ dme_lat = ils.get_loclat();
+ dme_elev = ils.get_gselev();
+ dme_range = FG_ILS_DEFAULT_RANGE;
+ dme_effective_range = kludgeRange(dme_elev, elev, dme_range);
+ dme_x = ils.get_dme_x();
+ dme_y = ils.get_dme_y();
+ dme_z = ils.get_dme_z();
+ }
+ } else if ( current_navlist->query( lon, lat, elev, dme_freq, &nav ) ) {
+ if (nav.get_has_dme()) {
+ dme_valid = true;
+ dme_lon = nav.get_lon();
+ dme_lat = nav.get_lat();
+ dme_elev = nav.get_elev();
+ dme_range = nav.get_range();
+ dme_effective_range = kludgeRange(dme_elev, elev, dme_range);
+ dme_x = nav.get_x();
+ dme_y = nav.get_y();
+ dme_z = nav.get_z();
+ }
+ } else {
+ dme_valid = false;
+ dme_dist = 0;
+ }
+
+
+ ////////////////////////////////////////////////////////////////////////
+ // Beacons.
+ ////////////////////////////////////////////////////////////////////////
+
+ FGMkrBeacon::fgMkrBeacType beacon_type
+ = current_beacons->query( lon * SGD_RADIANS_TO_DEGREES,
+ lat * SGD_RADIANS_TO_DEGREES, elev );
+
+ outer_marker = middle_marker = inner_marker = false;
+
+ if ( beacon_type == FGMkrBeacon::OUTER ) {
+ outer_marker = true;
+ // cout << "OUTER MARKER" << endl;
+#ifdef ENABLE_AUDIO_SUPPORT
+ if ( last_beacon != FGMkrBeacon::OUTER ) {
+ if ( ! globals->get_soundmgr()->exists( "outer-marker" ) ) {
+ FGSimpleSound *sound = beacon.get_outer();
+ sound->set_volume( 0.3 );
+ globals->get_soundmgr()->add( sound, "outer-marker" );
+ }
+ if ( !globals->get_soundmgr()->is_playing("outer-marker") ) {
+ globals->get_soundmgr()->play_looped( "outer-marker" );
+ }
+ }
+#endif
+ } else if ( beacon_type == FGMkrBeacon::MIDDLE ) {
+ middle_marker = true;
+ // cout << "MIDDLE MARKER" << endl;
+#ifdef ENABLE_AUDIO_SUPPORT
+ if ( last_beacon != FGMkrBeacon::MIDDLE ) {
+ if ( ! globals->get_soundmgr()->exists( "middle-marker" ) ) {
+ FGSimpleSound *sound = beacon.get_middle();
+ sound->set_volume( 0.3 );
+ globals->get_soundmgr()->add( sound, "middle-marker" );
+ }
+ if ( !globals->get_soundmgr()->is_playing("middle-marker") ) {
+ globals->get_soundmgr()->play_looped( "middle-marker" );
+ }
+ }
+#endif
+ } else if ( beacon_type == FGMkrBeacon::INNER ) {
+ inner_marker = true;
+ // cout << "INNER MARKER" << endl;
+#ifdef ENABLE_AUDIO_SUPPORT
+ if ( last_beacon != FGMkrBeacon::INNER ) {
+ if ( ! globals->get_soundmgr()->exists( "inner-marker" ) ) {
+ FGSimpleSound *sound = beacon.get_inner();
+ sound->set_volume( 0.3 );
+ globals->get_soundmgr()->add( sound, "inner-marker" );
+ }
+ if ( !globals->get_soundmgr()->is_playing("inner-marker") ) {
+ globals->get_soundmgr()->play_looped( "inner-marker" );
+ }
+ }
+#endif
+ } else {
+ // cout << "no marker" << endl;
+#ifdef ENABLE_AUDIO_SUPPORT
+ globals->get_soundmgr()->stop( "outer-marker" );
+ globals->get_soundmgr()->stop( "middle-marker" );
+ globals->get_soundmgr()->stop( "inner-marker" );
+#endif
+ }
+ last_beacon = beacon_type;
+
+ adf.search();
+ xponder.search();
+}
projects / flightgear.git / blobdiff