#include <simgear/math/sg_random.h>
#include <Main/fg_props.hxx>
-#include <Navaids/ilslist.hxx>
#include <Navaids/navlist.hxx>
#include "dme.hxx"
}
+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),
+ name("dme"),
+ num(0)
+{
+ int i;
+ for ( 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 dme config logic" );
+ if ( name.length() ) {
+ SG_LOG( SG_INSTR, SG_WARN, "Section = " << name );
+ }
+ }
+ }
+}
+
DME::DME ()
: _last_distance_nm(0),
_last_frequency_mhz(-1),
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", 0, true);
+ _time_node = node->getChild("indicated-time-min", 0, true);
+
+ _serviceable_node->setBoolValue(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;
Point3D location =
sgGeodToCart(Point3D(longitude_rad, latitude_rad, altitude_m));
double distance_nm = _transmitter.distance3D(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);