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flightgear/src/Instrumentation/marker_beacon.cxx
frohlich f9f9350b96 Adapt to SGTimeStamp changes. 
Modified Files:
	configure.ac src/Cockpit/panel.cxx src/FDM/Makefile.am
	src/FDM/flight.hxx src/FDM/ExternalNet/ExternalNet.hxx
	src/Instrumentation/marker_beacon.cxx src/Main/Makefile.am
	src/Main/fg_init.cxx src/Main/main.cxx
	src/MultiPlayer/multiplaymgr.cxx src/Time/fg_timer.cxx
	utils/GPSsmooth/MIDG_main.cxx utils/GPSsmooth/UGear_main.cxx
	utils/GPSsmooth/gps_main.cxx
2009-03-18 08:00:08 +01:00

379 lines
12 KiB
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// marker_beacon.cxx -- class to manage the marker beacons
//
// Written by Curtis Olson, started April 2000.
//
// Copyright (C) 2000 Curtis L. Olson - http://www.flightgear.org/~curt
//
// 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 <simgear/misc/sg_path.hxx>
#include <Aircraft/aircraft.hxx>
#include <Navaids/navlist.hxx>
#include "marker_beacon.hxx"
#include <string>
using std::string;
// Constructor
FGMarkerBeacon::FGMarkerBeacon(SGPropertyNode *node) :
audio_vol(NULL),
need_update(true),
outer_blink(false),
middle_blink(false),
inner_blink(false),
name("marker-beacon"),
num(0),
_time_before_search_sec(0.0)
{
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() );
for ( int i = 0; i < node->nChildren(); ++i ) {
SGPropertyNode *child = node->getChild(i);
string cname = child->getName();
string cval = child->getStringValue();
if ( cname == "name" ) {
name = cval;
} else if ( cname == "number" ) {
num = child->getIntValue();
} else {
SG_LOG( SG_INSTR, SG_WARN,
"Error in marker beacon config logic" );
if ( name.length() ) {
SG_LOG( SG_INSTR, SG_WARN, "Section = " << name );
}
}
}
}
// Destructor
FGMarkerBeacon::~FGMarkerBeacon()
{
delete term_tbl;
delete low_tbl;
delete high_tbl;
}
void
FGMarkerBeacon::init ()
{
string branch;
branch = "/instrumentation/" + name;
SGPropertyNode *node = fgGetNode(branch.c_str(), num, true );
// Inputs
sound_pause = fgGetNode("/sim/sound/pause", false);
lon_node = fgGetNode("/position/longitude-deg", true);
lat_node = fgGetNode("/position/latitude-deg", true);
alt_node = fgGetNode("/position/altitude-ft", true);
bus_power = fgGetNode("/systems/electrical/outputs/nav[0]", true);
power_btn = node->getChild("power-btn", 0, true);
audio_btn = node->getChild("audio-btn", 0, true);
audio_vol = node->getChild("volume", 0, true);
serviceable = node->getChild("serviceable", 0, true);
if (power_btn->getType() == SGPropertyNode::NONE)
power_btn->setBoolValue( true );
if (audio_btn->getType() == SGPropertyNode::NONE)
audio_btn->setBoolValue( true );
if (serviceable->getType() == SGPropertyNode::NONE)
serviceable->setBoolValue( true );
morse.init();
beacon.init();
blink.stamp();
outer_marker = middle_marker = inner_marker = false;
}
void
FGMarkerBeacon::bind ()
{
string branch;
branch = "/instrumentation/" + name;
fgTie((branch + "/inner").c_str(), this,
&FGMarkerBeacon::get_inner_blink);
fgTie((branch + "/middle").c_str(), this,
&FGMarkerBeacon::get_middle_blink);
fgTie((branch + "/outer").c_str(), this,
&FGMarkerBeacon::get_outer_blink);
}
void
FGMarkerBeacon::unbind ()
{
string branch;
branch = "/instrumentation/" + name;
fgUntie((branch + "/inner").c_str());
fgUntie((branch + "/middle").c_str());
fgUntie((branch + "/outer").c_str());
}
// Update the various nav values based on position and valid tuned in navs
void
FGMarkerBeacon::update(double dt)
{
need_update = false;
// On timeout, scan again, this needs to run every iteration no
// matter what the power or serviceable state. If power is turned
// off or the unit becomes unserviceable while a beacon sound is
// playing, the search() routine still needs to be called so the
// sound effect can be properly disabled.
_time_before_search_sec -= dt;
if ( _time_before_search_sec < 0 ) {
search();
}
if ( has_power() && serviceable->getBoolValue()
&& !sound_pause->getBoolValue()) {
// marker beacon blinking
bool light_on = ( outer_blink || middle_blink || inner_blink );
SGTimeStamp current = SGTimeStamp::now();
if ( light_on && blink + SGTimeStamp::fromUSec(400000) < current ) {
light_on = false;
blink = current;
} else if ( !light_on && blink + SGTimeStamp::fromUSec(100000) < current ) {
light_on = true;
blink = current;
}
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;
} else {
inner_blink = middle_blink = outer_blink = false;
}
}
static bool check_beacon_range( const SGGeod& pos,
FGPositioned *b )
{
double d = distSqr(b->cart(), SGVec3d::fromGeod(pos));
// cout << " distance = " << d << " ("
// << FG_ILS_DEFAULT_RANGE * SG_NM_TO_METER
// * FG_ILS_DEFAULT_RANGE * SG_NM_TO_METER
// << ")" << endl;
//std::cout << " range = " << sqrt(d) << std::endl;
// cout << "elev = " << elev * SG_METER_TO_FEET
// << " current->get_elev() = " << current->get_elev() << endl;
double elev_ft = pos.getElevationFt();
double delev = elev_ft - b->elevation();
// max range is the area under r = 2.4 * alt or r^2 = 4000^2 - alt^2
// whichever is smaller. The intersection point is 1538 ...
double maxrange2; // feet^2
if ( delev < 1538.0 ) {
maxrange2 = 2.4 * 2.4 * delev * delev;
} else if ( delev < 4000.0 ) {
maxrange2 = 4000 * 4000 - delev * delev;
} else {
maxrange2 = 0.0;
}
maxrange2 *= SG_FEET_TO_METER * SG_FEET_TO_METER; // convert to meter^2
//std::cout << "delev = " << delev << " maxrange = " << sqrt(maxrange2) << std::endl;
// match up to twice the published range so we can model
// reduced signal strength
if ( d < maxrange2 ) {
return true;
} else {
return false;
}
}
class BeaconFilter : public FGPositioned::Filter
{
public:
virtual FGPositioned::Type minType() const {
return FGPositioned::OM;
}
virtual FGPositioned::Type maxType() const {
return FGPositioned::IM;
}
};
// Update current nav/adf radio stations based on current postition
void FGMarkerBeacon::search()
{
// reset search time
_time_before_search_sec = 1.0;
static fgMkrBeacType last_beacon = NOBEACON;
SGGeod pos = SGGeod::fromDegFt(lon_node->getDoubleValue(),
lat_node->getDoubleValue(),
alt_node->getDoubleValue());
////////////////////////////////////////////////////////////////////////
// Beacons.
////////////////////////////////////////////////////////////////////////
// get closest marker beacon - within a 1nm cutoff
BeaconFilter filter;
FGPositionedRef b = FGPositioned::findClosest(pos, 1.0, &filter);
fgMkrBeacType beacon_type = NOBEACON;
bool inrange = false;
if ( b != NULL ) {
if ( b->type() == FGPositioned::OM ) {
beacon_type = OUTER;
} else if ( b->type() == FGPositioned::MM ) {
beacon_type = MIDDLE;
} else if ( b->type() == FGPositioned::IM ) {
beacon_type = INNER;
}
inrange = check_beacon_range( pos, b.ptr() );
}
outer_marker = middle_marker = inner_marker = false;
if ( b == NULL || !inrange || !has_power() || !serviceable->getBoolValue() )
{
// cout << "no marker" << endl;
globals->get_soundmgr()->stop( "outer-marker" );
globals->get_soundmgr()->stop( "middle-marker" );
globals->get_soundmgr()->stop( "inner-marker" );
} else {
string current_sound_name;
if ( beacon_type == OUTER ) {
outer_marker = true;
current_sound_name = "outer-marker";
// cout << "OUTER MARKER" << endl;
if ( last_beacon != OUTER ) {
if ( ! globals->get_soundmgr()->exists( current_sound_name ) ) {
SGSoundSample *sound = beacon.get_outer();
if ( sound ) {
globals->get_soundmgr()->add( sound, current_sound_name );
}
}
}
if ( audio_btn->getBoolValue() ) {
if ( !globals->get_soundmgr()->is_playing(current_sound_name) ) {
globals->get_soundmgr()->play_looped( current_sound_name );
}
} else {
globals->get_soundmgr()->stop( current_sound_name );
}
} else if ( beacon_type == MIDDLE ) {
middle_marker = true;
current_sound_name = "middle-marker";
// cout << "MIDDLE MARKER" << endl;
if ( last_beacon != MIDDLE ) {
if ( ! globals->get_soundmgr()->exists( current_sound_name ) ) {
SGSoundSample *sound = beacon.get_middle();
if ( sound ) {
globals->get_soundmgr()->add( sound, current_sound_name );
}
}
}
if ( audio_btn->getBoolValue() ) {
if ( !globals->get_soundmgr()->is_playing(current_sound_name) ) {
globals->get_soundmgr()->play_looped( current_sound_name );
}
} else {
globals->get_soundmgr()->stop( current_sound_name );
}
} else if ( beacon_type == INNER ) {
inner_marker = true;
current_sound_name = "inner-marker";
// cout << "INNER MARKER" << endl;
if ( last_beacon != INNER ) {
if ( ! globals->get_soundmgr()->exists( current_sound_name ) ) {
SGSoundSample *sound = beacon.get_inner();
if ( sound ) {
globals->get_soundmgr()->add( sound, current_sound_name );
}
}
}
if ( audio_btn->getBoolValue() ) {
if ( !globals->get_soundmgr()->is_playing(current_sound_name) ) {
globals->get_soundmgr()->play_looped( current_sound_name );
}
} else {
globals->get_soundmgr()->stop( current_sound_name );
}
}
// cout << "VOLUME " << audio_vol->getDoubleValue() << endl;
SGSoundSample * mkr = globals->get_soundmgr()->find( current_sound_name );
if (mkr)
mkr->set_volume( audio_vol->getDoubleValue() );
}
if ( inrange ) {
last_beacon = beacon_type;
} else {
last_beacon = NOBEACON;
}
}
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