447 lines
12 KiB
C++
447 lines
12 KiB
C++
// 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);
|
|
|
|
|
|
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),
|
|
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()
|
|
{
|
|
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 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;
|
|
|
|
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 {
|
|
dme_inrange = false;
|
|
dme_dist = 0.0;
|
|
dme_prev_dist = 0.0;
|
|
dme_spd = 0.0;
|
|
dme_ete = 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 == 1 && navcom1.get_power_btn() ) {
|
|
if ( dme_freq != navcom1.get_nav_freq() ) {
|
|
dme_freq = navcom1.get_nav_freq();
|
|
need_update = true;
|
|
}
|
|
} else if ( dme_switch_pos == 3 && navcom2.get_power_btn() ) {
|
|
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;
|
|
|
|
navcom1.search();
|
|
navcom2.search();
|
|
adf.search();
|
|
xponder.search();
|
|
}
|