//
// This file is in the Public Domain and comes with no warranty.
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
#include <simgear/compiler.h>
#include <simgear/math/sg_geodesy.hxx>
#include <simgear/math/sg_random.h>
#include <Main/fg_props.hxx>
-#include <Navaids/ilslist.hxx>
#include <Navaids/navlist.hxx>
#include "dme.hxx"
}
-DME::DME ()
+DME::DME ( SGPropertyNode *node )
: _last_distance_nm(0),
_last_frequency_mhz(-1),
_time_before_search_sec(0),
_transmitter_valid(false),
_transmitter_elevation_ft(0),
_transmitter_range_nm(0),
- _transmitter_bias(0.0)
+ _transmitter_bias(0.0),
+ _name(node->getStringValue("name", "dme")),
+ _num(node->getIntValue("number", 0))
{
}
void
DME::init ()
{
+ string branch;
+ branch = "/instrumentation/" + _name;
+
+ SGPropertyNode *node = fgGetNode(branch.c_str(), _num, true );
+
_longitude_node = fgGetNode("/position/longitude-deg", true);
_latitude_node = fgGetNode("/position/latitude-deg", true);
_altitude_node = fgGetNode("/position/altitude-ft", true);
- _serviceable_node = fgGetNode("/instrumentation/dme/serviceable", true);
+ _serviceable_node = node->getChild("serviceable", 0, true);
_electrical_node = fgGetNode("/systems/electrical/outputs/dme", true);
- _source_node = fgGetNode("/instrumentation/dme/frequencies/source", true);
- _frequency_node =
- fgGetNode("/instrumentation/dme/frequencies/selected-mhz", true);
-
- _in_range_node = fgGetNode("/instrumentation/dme/in-range", true);
- _distance_node =
- fgGetNode("/instrumentation/dme/indicated-distance-nm", true);
- _speed_node =
- fgGetNode("/instrumentation/dme/indicated-ground-speed-kt", true);
- _time_node =
- fgGetNode("/instrumentation/dme/indicated-time-min", true);
+ SGPropertyNode *fnode = node->getChild("frequencies", 0, true);
+ _source_node = fnode->getChild("source", 0, true);
+ _frequency_node = fnode->getChild("selected-mhz", 0, true);
+ _in_range_node = node->getChild("in-range", 0, true);
+ _distance_node = node->getChild("indicated-distance-nm", 0, true);
+ _speed_node = node->getChild("indicated-ground-speed-kt", 0, true);
+ _time_node = node->getChild("indicated-time-min", 0, true);
}
void
// Figure out the source
const char * source = _source_node->getStringValue();
if (source[0] == '\0') {
- source = "/instrumentation/dme/frequencies/selected-mhz";
- _source_node->setStringValue(source);
+ string branch;
+ branch = "/instrumentation/" + _name + "/frequencies/selected-mhz";
+ _source_node->setStringValue(branch.c_str());
+ source = _source_node->getStringValue();
}
-
// Get the frequency
+
double frequency_mhz = fgGetDouble(source, 108.0);
if (frequency_mhz != _last_frequency_mhz) {
_time_before_search_sec = 0;
}
// Calculate the distance to the transmitter
- Point3D location =
- sgGeodToCart(Point3D(longitude_rad, latitude_rad, altitude_m));
- double distance_nm = _transmitter.distance3D(location) * SG_METER_TO_NM;
+ SGGeod geod = SGGeod::fromRadM(longitude_rad, latitude_rad, altitude_m);
+ SGVec3d location = SGVec3d::fromGeod(geod);
+
+ double distance_nm = dist(_transmitter, location) * SG_METER_TO_NM;
+
double range_nm = adjust_range(_transmitter_elevation_ft,
altitude_m * SG_METER_TO_FEET,
_transmitter_range_nm);
+
if (distance_nm <= range_nm) {
double speed_kt = (fabs(distance_nm - _last_distance_nm) *
((1 / delta_time_sec) * 3600.0));
_last_distance_nm = distance_nm;
_in_range_node->setBoolValue(true);
- _distance_node->setDoubleValue(distance_nm - _transmitter_bias);
+ double tmp_dist = distance_nm - _transmitter_bias;
+ if ( tmp_dist < 0.0 ) {
+ tmp_dist = 0.0;
+ }
+ _distance_node->setDoubleValue( tmp_dist );
_speed_node->setDoubleValue(speed_kt);
- _time_node->setDoubleValue(distance_nm/speed_kt*60.0);
+ if (SGLimitsd::min() < fabs(speed_kt))
+ _time_node->setDoubleValue(distance_nm/speed_kt*60.0);
} else {
_last_distance_nm = 0;
_time_before_search_sec = 1.0;
// try the ILS list first
- FGNavRecord *dme
- = globals->get_dmelist()->findByFreq( frequency_mhz, longitude_rad,
- latitude_rad, altitude_m);
+
+ FGNavRecord *dme = globals->get_dmelist()->findByFreq( frequency_mhz,
+ SGGeod::fromRadM(longitude_rad, latitude_rad, altitude_m));
_transmitter_valid = (dme != NULL);
if ( _transmitter_valid ) {
- _transmitter = Point3D(dme->get_x(), dme->get_y(), dme->get_z());
+ _transmitter = dme->cart();
_transmitter_elevation_ft = dme->get_elev_ft();
_transmitter_range_nm = dme->get_range();
_transmitter_bias = dme->get_multiuse();