244 lines
7.2 KiB
C++
244 lines
7.2 KiB
C++
// marker_beacon.cxx -- class to manage the marker beacons
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//
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// Written by Curtis Olson, started April 2000.
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//
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// Copyright (C) 2000 Curtis L. Olson - curt@flightgear.org
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h> // snprintf
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#include <simgear/compiler.h>
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#include <simgear/math/sg_random.h>
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#include <Aircraft/aircraft.hxx>
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#include <Navaids/mkrbeacons.hxx>
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#include <Time/FGEventMgr.hxx>
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#include "marker_beacon.hxx"
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#include <string>
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SG_USING_STD(string);
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// Constructor
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FGMarkerBeacon::FGMarkerBeacon() :
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lon_node(fgGetNode("/position/longitude-deg", true)),
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lat_node(fgGetNode("/position/latitude-deg", true)),
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alt_node(fgGetNode("/position/altitude-ft", true)),
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bus_power(fgGetNode("/systems/electrical/outputs/navcom[0]", true)),
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power_btn(fgGetNode("/radios/marker-beacon/power-btn", true)),
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audio_btn(fgGetNode("/radios/marker-beacon/audio-btn", true)),
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servicable(fgGetNode("/instrumentation/marker-beacons/servicable", true)),
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need_update(true),
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outer_blink(false),
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middle_blink(false),
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inner_blink(false)
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{
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SGPath path( globals->get_fg_root() );
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SGPath term = path;
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term.append( "Navaids/range.term" );
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SGPath low = path;
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low.append( "Navaids/range.low" );
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SGPath high = path;
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high.append( "Navaids/range.high" );
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term_tbl = new SGInterpTable( term.str() );
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low_tbl = new SGInterpTable( low.str() );
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high_tbl = new SGInterpTable( high.str() );
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power_btn->setBoolValue( true );
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audio_btn->setBoolValue( true );
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servicable->setBoolValue( true );
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}
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// Destructor
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FGMarkerBeacon::~FGMarkerBeacon()
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{
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delete term_tbl;
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delete low_tbl;
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delete high_tbl;
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}
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void
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FGMarkerBeacon::init ()
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{
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morse.init();
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beacon.init();
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blink.stamp();
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}
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void
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FGMarkerBeacon::bind ()
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{
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fgTie("/radios/marker-beacon/inner", this,
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&FGMarkerBeacon::get_inner_blink);
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fgTie("/radios/marker-beacon/middle", this,
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&FGMarkerBeacon::get_middle_blink);
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fgTie("/radios/marker-beacon/outer", this,
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&FGMarkerBeacon::get_outer_blink);
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}
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void
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FGMarkerBeacon::unbind ()
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{
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fgUntie("/radios/marker-beacon/inner");
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fgUntie("/radios/marker-beacon/middle");
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fgUntie("/radios/marker-beacon/outer");
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}
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// Update the various nav values based on position and valid tuned in navs
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void
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FGMarkerBeacon::update(double dt)
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{
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need_update = false;
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if ( has_power() && servicable->getBoolValue() ) {
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// marker beacon blinking
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bool light_on = ( outer_blink || middle_blink || inner_blink );
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SGTimeStamp current;
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current.stamp();
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if ( light_on && (current - blink > 400000) ) {
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light_on = false;
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blink.stamp();
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} else if ( !light_on && (current - blink > 100000) ) {
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light_on = true;
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blink.stamp();
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}
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if ( outer_marker ) {
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outer_blink = light_on;
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} else {
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outer_blink = false;
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}
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if ( middle_marker ) {
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middle_blink = light_on;
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} else {
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middle_blink = false;
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}
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if ( inner_marker ) {
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inner_blink = light_on;
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} else {
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inner_blink = false;
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}
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// cout << outer_blink << " " << middle_blink << " "
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// << inner_blink << endl;
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} else {
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inner_blink = middle_blink = outer_blink = false;
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}
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}
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// Update current nav/adf radio stations based on current postition
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void FGMarkerBeacon::search()
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{
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static FGMkrBeacon::fgMkrBeacType last_beacon = FGMkrBeacon::NOBEACON;
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double lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
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double lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
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double elev = alt_node->getDoubleValue() * SG_FEET_TO_METER;
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////////////////////////////////////////////////////////////////////////
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// Beacons.
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////////////////////////////////////////////////////////////////////////
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FGMkrBeacon::fgMkrBeacType beacon_type
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= current_beacons->query( lon * SGD_RADIANS_TO_DEGREES,
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lat * SGD_RADIANS_TO_DEGREES, elev );
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outer_marker = middle_marker = inner_marker = false;
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if ( beacon_type == FGMkrBeacon::NOBEACON
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|| !has_power() || !servicable->getBoolValue() )
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{
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// cout << "no marker" << endl;
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beacon_type = FGMkrBeacon::NOBEACON;
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globals->get_soundmgr()->stop( "outer-marker" );
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globals->get_soundmgr()->stop( "middle-marker" );
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globals->get_soundmgr()->stop( "inner-marker" );
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} else if ( beacon_type == FGMkrBeacon::OUTER ) {
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outer_marker = true;
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// cout << "OUTER MARKER" << endl;
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if ( last_beacon != FGMkrBeacon::OUTER ) {
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if ( ! globals->get_soundmgr()->exists( "outer-marker" ) ) {
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SimpleSound *sound = beacon.get_outer();
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sound->set_volume( 0.3 );
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globals->get_soundmgr()->add( sound, "outer-marker" );
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}
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}
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if ( audio_btn->getBoolValue() ) {
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if ( !globals->get_soundmgr()->is_playing("outer-marker") ) {
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globals->get_soundmgr()->play_looped( "outer-marker" );
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}
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} else {
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globals->get_soundmgr()->stop( "outer-marker" );
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}
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} else if ( beacon_type == FGMkrBeacon::MIDDLE ) {
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middle_marker = true;
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// cout << "MIDDLE MARKER" << endl;
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if ( last_beacon != FGMkrBeacon::MIDDLE ) {
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if ( ! globals->get_soundmgr()->exists( "middle-marker" ) ) {
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SimpleSound *sound = beacon.get_middle();
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sound->set_volume( 0.3 );
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globals->get_soundmgr()->add( sound, "middle-marker" );
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}
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}
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if ( audio_btn->getBoolValue() ) {
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if ( !globals->get_soundmgr()->is_playing("middle-marker") ) {
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globals->get_soundmgr()->play_looped( "middle-marker" );
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}
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} else {
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globals->get_soundmgr()->stop( "middle-marker" );
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}
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} else if ( beacon_type == FGMkrBeacon::INNER ) {
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inner_marker = true;
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// cout << "INNER MARKER" << endl;
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if ( last_beacon != FGMkrBeacon::INNER ) {
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if ( ! globals->get_soundmgr()->exists( "inner-marker" ) ) {
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SimpleSound *sound = beacon.get_inner();
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sound->set_volume( 0.3 );
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globals->get_soundmgr()->add( sound, "inner-marker" );
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}
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}
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if ( audio_btn->getBoolValue() ) {
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if ( !globals->get_soundmgr()->is_playing("inner-marker") ) {
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globals->get_soundmgr()->play_looped( "inner-marker" );
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}
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} else {
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globals->get_soundmgr()->stop( "inner-marker" );
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}
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}
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last_beacon = beacon_type;
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}
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