fly/flightgear
1
0
Fork 0
Code Activity
flightgear/src/Cockpit/radiostack.cxx

1253 lines
40 KiB
C++
Raw Blame History

// radiostack.cxx -- class to manage an instance of the radio stack
//
// Written by Curtis Olson, started April 2000.
//
// Copyright (C) 2000 Curtis L. Olson - curt@flightgear.org
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// 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.
//
// $Id$
#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);
static int nav1_play_count = 0;
static int nav2_play_count = 0;
static time_t nav1_last_time = 0;
static time_t nav2_last_time = 0;
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() :
lon_node(fgGetNode("/position/longitude-deg", true)),
lat_node(fgGetNode("/position/latitude-deg", true)),
alt_node(fgGetNode("/position/altitude-ft", true)),
need_update(true),
comm1_freq(0.0),
comm1_alt_freq(0.0),
comm1_vol_btn(0.0),
comm2_freq(0.0),
comm2_alt_freq(0.0),
comm2_vol_btn(0.0),
nav1_freq(0.0),
nav1_alt_freq(0.0),
nav1_radial(0.0),
nav1_vol_btn(0.0),
nav2_freq(0.0),
nav2_alt_freq(0.0),
nav2_radial(0.0),
nav2_vol_btn(0.0),
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()
{
adf.unbind();
xponder.unbind();
unbind(); // FIXME: should be called externally
delete term_tbl;
delete low_tbl;
delete high_tbl;
}
void
FGRadioStack::init ()
{
adf.init();
xponder.init();
morse.init();
beacon.init();
blink.stamp();
search();
adf.search();
xponder.search();
update(0); // FIXME: use dt
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/comm[0]/frequencies/selected-mhz", this,
&FGRadioStack::get_comm1_freq, &FGRadioStack::set_comm1_freq);
fgSetArchivable("/radios/comm[0]/frequencies/selected-mhz");
fgTie("/radios/comm[0]/frequencies/standby-mhz", this,
&FGRadioStack::get_comm1_alt_freq, &FGRadioStack::set_comm1_alt_freq);
fgSetArchivable("/radios/comm[0]/frequencies/standby-mhz");
fgTie("/radios/comm[0]/volume", this,
&FGRadioStack::get_comm1_vol_btn,
&FGRadioStack::set_comm1_vol_btn);
fgSetArchivable("/radios/comm[0]/volume");
fgTie("/radios/comm[0]/ident", this,
&FGRadioStack::get_comm1_ident_btn,
&FGRadioStack::set_comm1_ident_btn);
fgSetArchivable("/radios/comm[0]/ident");
fgTie("/radios/comm[1]/frequencies/selected-mhz", this,
&FGRadioStack::get_comm2_freq, &FGRadioStack::set_comm2_freq);
fgSetArchivable("/radios/comm[0]/frequencies/selected-mhz");
fgTie("/radios/comm[1]/frequencies/standby-mhz", this,
&FGRadioStack::get_comm2_alt_freq, &FGRadioStack::set_comm2_alt_freq);
fgSetArchivable("/radios/comm[0]/frequencies/standby-mhz");
fgTie("/radios/comm[1]/volume", this,
&FGRadioStack::get_comm2_vol_btn,
&FGRadioStack::set_comm2_vol_btn);
fgSetArchivable("/radios/comm[0]/volume");
fgTie("/radios/comm[1]/ident", this,
&FGRadioStack::get_comm2_ident_btn,
&FGRadioStack::set_comm2_ident_btn);
fgSetArchivable("/radios/comm[1]/ident");
fgTie("/radios/nav[0]/frequencies/selected-mhz", this,
&FGRadioStack::get_nav1_freq, &FGRadioStack::set_nav1_freq);
fgSetArchivable("/radios/nav[0]/frequencies/selected-mhz");
fgTie("/radios/nav[0]/frequencies/standby-mhz", this,
&FGRadioStack::get_nav1_alt_freq, &FGRadioStack::set_nav1_alt_freq);
fgSetArchivable("/radios/nav[0]/frequencies/standby-mhz");
fgTie("/radios/nav[0]/radials/selected-deg", this,
&FGRadioStack::get_nav1_sel_radial,
&FGRadioStack::set_nav1_sel_radial);
fgSetArchivable("/radios/nav[0]/radials/selected-deg");
fgTie("/radios/nav[0]/volume", this,
&FGRadioStack::get_nav1_vol_btn,
&FGRadioStack::set_nav1_vol_btn);
fgSetArchivable("/radios/nav[0]/volume");
fgTie("/radios/nav[0]/ident", this,
&FGRadioStack::get_nav1_ident_btn,
&FGRadioStack::set_nav1_ident_btn);
fgSetArchivable("/radios/nav[0]/ident");
// Radio outputs
fgTie("/radios/nav[0]/radials/actual-deg", this,
&FGRadioStack::get_nav1_radial);
fgTie("/radios/nav[0]/to-flag", this, &FGRadioStack::get_nav1_to_flag);
fgTie("/radios/nav[0]/from-flag", this, &FGRadioStack::get_nav1_from_flag);
fgTie("/radios/nav[0]/in-range", this, &FGRadioStack::get_nav1_inrange);
fgTie("/radios/nav[0]/heading-needle-deflection", this,
&FGRadioStack::get_nav1_heading_needle_deflection);
fgTie("/radios/nav[0]/gs-needle-deflection", this,
&FGRadioStack::get_nav1_gs_needle_deflection);
// User inputs
fgTie("/radios/nav[1]/frequencies/selected-mhz", this,
&FGRadioStack::get_nav2_freq, &FGRadioStack::set_nav2_freq);
fgSetArchivable("/radios/nav[1]/frequencies/selected-mhz");
fgTie("/radios/nav[1]/frequencies/standby-mhz", this,
&FGRadioStack::get_nav2_alt_freq, &FGRadioStack::set_nav2_alt_freq);
fgSetArchivable("/radios/nav[1]/frequencies/standby-mhz");
fgTie("/radios/nav[1]/radials/selected-deg", this,
&FGRadioStack::get_nav2_sel_radial,
&FGRadioStack::set_nav2_sel_radial);
fgSetArchivable("/radios/nav[1]/radials/selected-deg");
fgTie("/radios/nav[1]/volume", this,
&FGRadioStack::get_nav2_vol_btn,
&FGRadioStack::set_nav2_vol_btn);
fgSetArchivable("/radios/nav[1]/volume");
fgTie("/radios/nav[1]/ident", this,
&FGRadioStack::get_nav2_ident_btn,
&FGRadioStack::set_nav2_ident_btn);
fgSetArchivable("/radios/nav[1]/ident");
// Radio outputs
fgTie("/radios/nav[1]/radials/actual-deg", this,
&FGRadioStack::get_nav2_radial);
fgTie("/radios/nav[1]/to-flag", this, &FGRadioStack::get_nav2_to_flag);
fgTie("/radios/nav[1]/from-flag", this, &FGRadioStack::get_nav2_from_flag);
fgTie("/radios/nav[1]/in-range", this, &FGRadioStack::get_nav2_inrange);
fgTie("/radios/nav[1]/heading-needle-deflection", this,
&FGRadioStack::get_nav2_heading_needle_deflection);
fgTie("/radios/nav[1]/gs-needle-deflection", this,
&FGRadioStack::get_nav2_gs_needle_deflection);
// 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);
adf.bind();
xponder.bind();
}
void
FGRadioStack::unbind ()
{
fgUntie("/radios/comm[0]/frequencies/selected-mhz");
fgUntie("/radios/comm[0]/frequencies/standby-mhz");
fgUntie("/radios/comm[0]/on");
fgUntie("/radios/comm[0]/ident");
fgUntie("/radios/comm[1]/frequencies/selected-mhz");
fgUntie("/radios/comm[1]/frequencies/standby-mhz");
fgUntie("/radios/comm[1]/on");
fgUntie("/radios/comm[1]/ident");
fgUntie("/radios/nav[0]/frequencies/selected-mhz");
fgUntie("/radios/nav[0]/frequencies/standby-mhz");
fgUntie("/radios/nav[0]/radials/actual-deg");
fgUntie("/radios/nav[0]/radials/selected-deg");
fgUntie("/radios/nav[0]/on");
fgUntie("/radios/nav[0]/ident");
fgUntie("/radios/nav[0]/to-flag");
fgUntie("/radios/nav[0]/from-flag");
fgUntie("/radios/nav[0]/in-range");
fgUntie("/radios/nav[0]/heading-needle-deflection");
fgUntie("/radios/nav[0]/gs-needle-deflection");
fgUntie("/radios/nav[1]/frequencies/selected-mhz");
fgUntie("/radios/nav[1]/frequencies/standby-mhz");
fgUntie("/radios/nav[1]/radials/actual-deg");
fgUntie("/radios/nav[1]/radials/selected-deg");
fgUntie("/radios/nav[1]/on");
fgUntie("/radios/nav[1]/ident");
fgUntie("/radios/nav[1]/to-flag");
fgUntie("/radios/nav[1]/from-flag");
fgUntie("/radios/nav[1]/in-range");
fgUntie("/radios/nav[1]/heading-needle-deflection");
fgUntie("/radios/nav[1]/gs-needle-deflection");
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");
adf.unbind();
xponder.unbind();
}
// model standard VOR/DME/TACAN service volumes as per AIM 1-1-8
double FGRadioStack::adjustNavRange( double stationElev, double aircraftElev,
double nominalRange )
{
// extend out actual usable range to be 1.3x the published safe range
const double usability_factor = 1.3;
// assumptions we model the standard service volume, plus
// ... rather than specifying a cylinder, we model a cone that
// contains the cylinder. Then we put an upside down cone on top
// to model diminishing returns at too-high altitudes.
// altitude difference
double alt = ( aircraftElev * SG_METER_TO_FEET - stationElev );
// cout << "aircraft elev = " << aircraftElev * SG_METER_TO_FEET
// << " station elev = " << stationElev << endl;
if ( nominalRange < 25.0 + SG_EPSILON ) {
// Standard Terminal Service Volume
return term_tbl->interpolate( alt ) * usability_factor;
} else if ( nominalRange < 50.0 + SG_EPSILON ) {
// Standard Low Altitude Service Volume
// table is based on range of 40, scale to actual range
return low_tbl->interpolate( alt ) * nominalRange / 40.0
* usability_factor;
} else {
// Standard High Altitude Service Volume
// table is based on range of 130, scale to actual range
return high_tbl->interpolate( alt ) * nominalRange / 130.0
* usability_factor;
}
}
// model standard ILS service volumes as per AIM 1-1-9
double FGRadioStack::adjustILSRange( double stationElev, double aircraftElev,
double offsetDegrees, double distance )
{
// assumptions we model the standard service volume, plus
// altitude difference
// double alt = ( aircraftElev * SG_METER_TO_FEET - stationElev );
double offset = fabs( offsetDegrees );
if ( offset < 10 ) {
return FG_ILS_DEFAULT_RANGE;
} else if ( offset < 35 ) {
return 10 + (35 - offset) * (FG_ILS_DEFAULT_RANGE - 10) / 25;
} else if ( offset < 45 ) {
return (45 - offset);
} else if ( offset > 170 ) {
return FG_ILS_DEFAULT_RANGE;
} else if ( offset > 145 ) {
return 10 + (offset - 145) * (FG_ILS_DEFAULT_RANGE - 10) / 25;
} else if ( offset > 135 ) {
return (offset - 135);
} else {
return 0;
}
}
// 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;
Point3D aircraft = sgGeodToCart( Point3D( lon, lat, elev ) );
Point3D station;
double az1, az2, s;
////////////////////////////////////////////////////////////////////////
// Nav1.
////////////////////////////////////////////////////////////////////////
if ( nav1_valid ) {
station = Point3D( nav1_x, nav1_y, nav1_z );
nav1_loc_dist = aircraft.distance3D( station );
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;
}
// wgs84 heading
geo_inverse_wgs_84( elev, lat * SGD_RADIANS_TO_DEGREES, lon * SGD_RADIANS_TO_DEGREES,
nav1_loclat, nav1_loclon,
&az1, &az2, &s );
// cout << "az1 = " << az1 << " magvar = " << nav1_magvar << endl;
nav1_heading = az1 - nav1_magvar;
// cout << " heading = " << nav1_heading
// << " dist = " << nav1_dist << endl;
if ( nav1_loc ) {
double offset = nav1_heading - nav1_radial;
while ( offset < -180.0 ) { offset += 360.0; }
while ( offset > 180.0 ) { offset -= 360.0; }
// cout << "ils offset = " << offset << endl;
nav1_effective_range = adjustILSRange(nav1_elev, elev, offset,
nav1_loc_dist * SG_METER_TO_NM );
} else {
nav1_effective_range = adjustNavRange(nav1_elev, elev, nav1_range);
}
// cout << "nav1 range = " << nav1_effective_range
// << " (" << nav1_range << ")" << endl;
if ( nav1_loc_dist < nav1_effective_range * SG_NM_TO_METER ) {
nav1_inrange = true;
} else if ( nav1_loc_dist < 2 * nav1_effective_range * SG_NM_TO_METER ) {
nav1_inrange = sg_random() <
( 2 * nav1_effective_range * SG_NM_TO_METER - nav1_loc_dist ) /
(nav1_effective_range * SG_NM_TO_METER);
} else {
nav1_inrange = false;
}
if ( !nav1_loc ) {
nav1_radial = nav1_sel_radial;
}
} else {
nav1_inrange = false;
// cout << "not picking up vor. :-(" << endl;
}
#ifdef ENABLE_AUDIO_SUPPORT
if ( nav1_valid && nav1_inrange ) {
// play station ident via audio system if on + ident,
// otherwise turn it off
if ( nav1_vol_btn > 0.1 && nav1_ident_btn ) {
FGSimpleSound *sound;
sound = globals->get_soundmgr()->find( "nav1-vor-ident" );
if ( sound != NULL ) {
sound->set_volume( nav1_vol_btn );
} else {
SG_LOG( SG_COCKPIT, SG_ALERT,
"Can't find nav1-vor-ident sound" );
}
sound = globals->get_soundmgr()->find( "nav1-dme-ident" );
if ( sound != NULL ) {
sound->set_volume( nav1_vol_btn );
} else {
SG_LOG( SG_COCKPIT, SG_ALERT,
"Can't find nav1-dme-ident sound" );
}
// cout << "nav1_last_time = " << nav1_last_time << " ";
// cout << "cur_time = " << globals->get_time_params()->get_cur_time();
if ( nav1_last_time <
globals->get_time_params()->get_cur_time() - 30 ) {
nav1_last_time = globals->get_time_params()->get_cur_time();
nav1_play_count = 0;
}
// cout << " nav1_play_count = " << nav1_play_count << endl;
// cout << "playing = "
// << globals->get_soundmgr()->is_playing("nav1-vor-ident")
// << endl;
if ( nav1_play_count < 4 ) {
// play VOR ident
if ( !globals->get_soundmgr()->is_playing("nav1-vor-ident") ) {
globals->get_soundmgr()->play_once( "nav1-vor-ident" );
++nav1_play_count;
}
} else if ( nav1_play_count < 5 && nav1_has_dme ) {
// play DME ident
if ( !globals->get_soundmgr()->is_playing("nav1-vor-ident") &&
!globals->get_soundmgr()->is_playing("nav1-dme-ident") ) {
globals->get_soundmgr()->play_once( "nav1-dme-ident" );
++nav1_play_count;
}
}
} else {
globals->get_soundmgr()->stop( "nav1-vor-ident" );
globals->get_soundmgr()->stop( "nav1-dme-ident" );
}
}
#endif
////////////////////////////////////////////////////////////////////////
// Nav2.
////////////////////////////////////////////////////////////////////////
if ( nav2_valid ) {
station = Point3D( nav2_x, nav2_y, nav2_z );
nav2_loc_dist = aircraft.distance3D( station );
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;
}
// wgs84 heading
geo_inverse_wgs_84( elev, lat * SGD_RADIANS_TO_DEGREES, lon * SGD_RADIANS_TO_DEGREES,
nav2_loclat, nav2_loclon,
&az1, &az2, &s );
nav2_heading = az1 - nav2_magvar;
// cout << " heading = " << nav2_heading
// << " dist = " << nav2_dist << endl;
if ( nav2_loc ) {
double offset = nav2_heading - nav2_radial;
while ( offset < -180.0 ) { offset += 360.0; }
while ( offset > 180.0 ) { offset -= 360.0; }
// cout << "ils offset = " << offset << endl;
nav2_effective_range = adjustILSRange(nav2_elev, elev, offset,
nav2_loc_dist * SG_METER_TO_NM );
} else {
nav2_effective_range = adjustNavRange(nav2_elev, elev, nav2_range);
}
// cout << "nav2 range = " << nav2_effective_range
// << " (" << nav2_range << ")" << endl;
if ( nav2_loc_dist < nav2_effective_range * SG_NM_TO_METER ) {
nav2_inrange = true;
} else if ( nav2_loc_dist < 2 * nav2_effective_range * SG_NM_TO_METER ) {
nav2_inrange = sg_random() <
( 2 * nav2_effective_range * SG_NM_TO_METER - nav2_loc_dist ) /
(nav2_effective_range * SG_NM_TO_METER);
} else {
nav2_inrange = false;
}
if ( !nav2_loc ) {
nav2_radial = nav2_sel_radial;
}
} else {
nav2_inrange = false;
// cout << "not picking up vor. :-(" << endl;
}
#ifdef ENABLE_AUDIO_SUPPORT
if ( nav2_valid && nav2_inrange ) {
// play station ident via audio system if on + ident,
// otherwise turn it off
if ( nav2_vol_btn > 0.1 && nav2_ident_btn ) {
FGSimpleSound *sound;
sound = globals->get_soundmgr()->find( "nav2-vor-ident" );
if ( sound != NULL ) {
sound->set_volume( nav2_vol_btn );
} else {
SG_LOG( SG_COCKPIT, SG_ALERT,
"Can't find nav2-vor-ident sound" );
}
sound = globals->get_soundmgr()->find( "nav2-dme-ident" );
if ( sound != NULL ) {
sound->set_volume( nav2_vol_btn );
} else {
SG_LOG( SG_COCKPIT, SG_ALERT,
"Can't find nav2-dme-ident sound" );
}
if ( nav2_last_time <
globals->get_time_params()->get_cur_time() - 30 ) {
nav2_last_time = globals->get_time_params()->get_cur_time();
nav2_play_count = 0;
}
if ( nav2_play_count < 4 ) {
// play VOR ident
if ( !globals->get_soundmgr()->is_playing("nav2-vor-ident") ) {
globals->get_soundmgr()->play_once( "nav2-vor-ident" );
++nav2_play_count;
}
} else if ( nav2_play_count < 5 && nav2_has_dme ) {
// play DME ident
if ( !globals->get_soundmgr()->is_playing("nav2-vor-ident") &&
!globals->get_soundmgr()->is_playing("nav2-dme-ident") ) {
globals->get_soundmgr()->play_once( "nav2-dme-ident" );
++nav2_play_count;
}
}
} else {
globals->get_soundmgr()->stop( "nav2-vor-ident" );
globals->get_soundmgr()->stop( "nav2-dme-ident" );
}
}
#endif
////////////////////////////////////////////////////////////////////////
// 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 {
dme_inrange = false;
dme_dist = 0.0;
dme_prev_dist = 0.0;
}
// 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 {
outer_blink = false;
}
if ( middle_marker ) {
middle_blink = light_on;
} else {
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 == 0) {
dme_freq = 0;
dme_inrange = false;
} else if (dme_switch_pos == 1) {
if (dme_freq != nav1_freq) {
dme_freq = nav1_freq;
need_update = true;
}
} else if (dme_switch_pos == 3) {
if (dme_freq != nav2_freq) {
dme_freq = nav2_freq;
need_update = true;
}
}
FGILS ils;
FGNav nav;
static string last_nav1_ident = "";
static string last_nav2_ident = "";
static bool last_nav1_vor = false;
static bool last_nav2_vor = false;
////////////////////////////////////////////////////////////////////////
// Nav1.
////////////////////////////////////////////////////////////////////////
if ( current_ilslist->query( lon, lat, elev, nav1_freq, &ils ) ) {
nav1_ident = ils.get_locident();
nav1_valid = true;
if ( last_nav1_ident != nav1_ident || last_nav1_vor ) {
nav1_trans_ident = ils.get_trans_ident();
last_nav1_ident = nav1_ident;
last_nav1_vor = false;
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_elev = ils.get_gselev();
nav1_magvar = 0;
nav1_range = FG_ILS_DEFAULT_RANGE;
nav1_effective_range = nav1_range;
nav1_target_gs = ils.get_gsangle();
nav1_radial = ils.get_locheading();
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();
#ifdef ENABLE_AUDIO_SUPPORT
if ( globals->get_soundmgr()->exists( "nav1-vor-ident" ) ) {
globals->get_soundmgr()->remove( "nav1-vor-ident" );
}
FGSimpleSound *sound;
sound = morse.make_ident( nav1_trans_ident, LO_FREQUENCY );
sound->set_volume( 0.3 );
globals->get_soundmgr()->add( sound, "nav1-vor-ident" );
if ( globals->get_soundmgr()->exists( "nav1-dme-ident" ) ) {
globals->get_soundmgr()->remove( "nav1-dme-ident" );
}
sound = morse.make_ident( nav1_trans_ident, HI_FREQUENCY );
sound->set_volume( 0.3 );
globals->get_soundmgr()->add( sound, "nav1-dme-ident" );
int offset = (int)(sg_random() * 30.0);
nav1_play_count = offset / 4;
nav1_last_time = globals->get_time_params()->get_cur_time() -
offset;
// cout << "offset = " << offset << " play_count = "
// << nav1_play_count
// << " nav1_last_time = " << nav1_last_time
// << " current time = "
// << globals->get_time_params()->get_cur_time() << endl;
#endif
// cout << "Found an ils station in range" << endl;
// cout << " id = " << ils.get_locident() << endl;
}
} else if ( current_navlist->query( lon, lat, elev, nav1_freq, &nav ) ) {
nav1_ident = nav.get_ident();
nav1_valid = true;
if ( last_nav1_ident != nav1_ident || !last_nav1_vor ) {
last_nav1_ident = nav1_ident;
last_nav1_vor = true;
nav1_trans_ident = nav.get_trans_ident();
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_range = nav.get_range();
nav1_effective_range = adjustNavRange(nav1_elev, elev, nav1_range);
nav1_target_gs = 0.0;
nav1_radial = nav1_sel_radial;
nav1_x = nav.get_x();
nav1_y = nav.get_y();
nav1_z = nav.get_z();
#ifdef ENABLE_AUDIO_SUPPORT
if ( globals->get_soundmgr()->exists( "nav1-vor-ident" ) ) {
globals->get_soundmgr()->remove( "nav1-vor-ident" );
}
FGSimpleSound *sound;
sound = morse.make_ident( nav1_trans_ident, LO_FREQUENCY );
sound->set_volume( 0.3 );
if ( globals->get_soundmgr()->add( sound, "nav1-vor-ident" ) ) {
// cout << "Added nav1-vor-ident sound" << endl;
} else {
// cout << "Failed to add v1-vor-ident sound" << endl;
}
if ( globals->get_soundmgr()->exists( "nav1-dme-ident" ) ) {
globals->get_soundmgr()->remove( "nav1-dme-ident" );
}
sound = morse.make_ident( nav1_trans_ident, HI_FREQUENCY );
sound->set_volume( 0.3 );
globals->get_soundmgr()->add( sound, "nav1-dme-ident" );
int offset = (int)(sg_random() * 30.0);
nav1_play_count = offset / 4;
nav1_last_time = globals->get_time_params()->get_cur_time() -
offset;
// cout << "offset = " << offset << " play_count = "
// << nav1_play_count << " nav1_last_time = "
// << nav1_last_time << " current time = "
// << globals->get_time_params()->get_cur_time() << endl;
#endif
// cout << "Found a vor station in range" << endl;
// cout << " id = " << nav.get_ident() << endl;
}
} else {
nav1_valid = false;
nav1_ident = "";
nav1_radial = 0;
nav1_trans_ident = "";
last_nav1_ident = "";
#ifdef ENABLE_AUDIO_SUPPORT
if ( ! globals->get_soundmgr()->remove( "nav1-vor-ident" ) ) {
// cout << "Failed to remove nav1-vor-ident sound" << endl;
}
globals->get_soundmgr()->remove( "nav1-dme-ident" );
#endif
// cout << "not picking up vor1. :-(" << endl;
}
////////////////////////////////////////////////////////////////////////
// Nav2.
////////////////////////////////////////////////////////////////////////
if ( current_ilslist->query( lon, lat, elev, nav2_freq, &ils ) ) {
nav2_ident = ils.get_locident();
nav2_valid = true;
if ( last_nav2_ident != nav2_ident || last_nav2_vor ) {
last_nav2_ident = nav2_ident;
last_nav2_vor = false;
nav2_trans_ident = ils.get_trans_ident();
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_range = FG_ILS_DEFAULT_RANGE;
nav2_effective_range = nav2_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();
#ifdef ENABLE_AUDIO_SUPPORT
if ( globals->get_soundmgr()->exists( "nav2-vor-ident" ) ) {
globals->get_soundmgr()->remove( "nav2-vor-ident" );
}
FGSimpleSound *sound;
sound = morse.make_ident( nav2_trans_ident, LO_FREQUENCY );
sound->set_volume( 0.3 );
globals->get_soundmgr()->add( sound, "nav2-vor-ident" );
if ( globals->get_soundmgr()->exists( "nav2-dme-ident" ) ) {
globals->get_soundmgr()->remove( "nav2-dme-ident" );
}
sound = morse.make_ident( nav2_trans_ident, HI_FREQUENCY );
sound->set_volume( 0.3 );
globals->get_soundmgr()->add( sound, "nav2-dme-ident" );
int offset = (int)(sg_random() * 30.0);
nav2_play_count = offset / 4;
nav2_last_time = globals->get_time_params()->get_cur_time() -
offset;
// cout << "offset = " << offset << " play_count = "
// << nav2_play_count << " nav2_last_time = "
// << nav2_last_time << " current time = "
// << globals->get_time_params()->get_cur_time() << endl;
#endif
// 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_ident = nav.get_ident();
nav2_valid = true;
if ( last_nav2_ident != nav2_ident || !last_nav2_vor ) {
last_nav2_ident = nav2_ident;
last_nav2_vor = true;
nav2_trans_ident = nav.get_trans_ident();
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_range = nav.get_range();
nav2_effective_range = adjustNavRange(nav2_elev, elev, nav2_range);
nav2_target_gs = 0.0;
nav2_radial = nav2_sel_radial;
nav2_x = nav.get_x();
nav2_y = nav.get_y();
nav2_z = nav.get_z();
#ifdef ENABLE_AUDIO_SUPPORT
if ( globals->get_soundmgr()->exists( "nav2-vor-ident" ) ) {
globals->get_soundmgr()->remove( "nav2-vor-ident" );
}
FGSimpleSound *sound;
sound = morse.make_ident( nav2_trans_ident, LO_FREQUENCY );
sound->set_volume( 0.3 );
globals->get_soundmgr()->add( sound, "nav2-vor-ident" );
if ( globals->get_soundmgr()->exists( "nav2-dme-ident" ) ) {
globals->get_soundmgr()->remove( "nav2-dme-ident" );
}
sound = morse.make_ident( nav2_trans_ident, HI_FREQUENCY );
sound->set_volume( 0.3 );
globals->get_soundmgr()->add( sound, "nav2-dme-ident" );
int offset = (int)(sg_random() * 30.0);
nav2_play_count = offset / 4;
nav2_last_time = globals->get_time_params()->get_cur_time() -
offset;
// cout << "offset = " << offset << " play_count = "
// << nav2_play_count << " nav2_last_time = "
// << nav2_last_time << " current time = "
// << globals->get_time_params()->get_cur_time() << endl;
#endif
// cout << "Found a vor station in range" << endl;
// cout << " id = " << nav.get_ident() << endl;
}
} else {
nav2_valid = false;
nav2_ident = "";
nav2_radial = 0;
nav2_trans_ident = "";
last_nav2_ident = "";
#ifdef ENABLE_AUDIO_SUPPORT
globals->get_soundmgr()->remove( "nav2-vor-ident" );
globals->get_soundmgr()->remove( "nav2-dme-ident" );
#endif
// cout << "not picking up vor1. :-(" << endl;
}
////////////////////////////////////////////////////////////////////////
// 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();
}
// 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 = (fgGetDouble("/position/altitude-ft") - nav1_elev)
* SG_FEET_TO_METER;
double angle = atan2( y, x ) * SGD_RADIANS_TO_DEGREES;
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 = (fgGetDouble("/position/altitude-ft") - nav2_elev)
* SG_FEET_TO_METER;
double angle = atan2( y, x ) * SGD_RADIANS_TO_DEGREES;
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;
}
}
View git blame Copy permalink