#include "AIBase.hxx"
#include "AIManager.hxx"
-FGAIBase::FGAIBase() {
+
+const double FGAIBase::e = 2.71828183;
+const double FGAIBase::lbs_to_slugs = 0.031080950172; //conversion factor
+
+
+FGAIBase::FGAIBase()
+ : fp( NULL ),
+ model( NULL ),
+ props( NULL ),
+ manager( NULL )
+{
_type_str = "model";
tgt_roll = roll = tgt_pitch = tgt_yaw = tgt_vs = vs = pitch = 0.0;
bearing = elevation = range = rdot = 0.0;
x_shift = y_shift = rotation = 0.0;
+ in_range = false;
invisible = true;
no_roll = true;
+ life = 900;
model_path = "";
- model = 0;
_otype = otNull;
index = 0;
+ delete_me = false;
}
FGAIBase::~FGAIBase() {
// unbind();
SGPropertyNode *root = globals->get_props()->getNode("ai/models", true);
root->removeChild(_type_str.c_str(), index);
+ if (fp) delete fp;
+ fp = NULL;
}
void FGAIBase::update(double dt) {
+ ft_per_deg_lat = 366468.96 - 3717.12 * cos(pos.lat()/SG_RADIANS_TO_DEGREES);
+ ft_per_deg_lon = 365228.16 * cos(pos.lat() / SG_RADIANS_TO_DEGREES);
+
+ // Calculate rho at altitude, using standard atmosphere
+ // For the temperature T and the pressure p,
+
+ if (altitude < 36152) { // curve fits for the troposphere
+ T = 59 - 0.00356 * altitude;
+ p = 2116 * pow( ((T + 459.7) / 518.6) , 5.256);
+
+ } else if ( 36152 < altitude && altitude < 82345 ) { // lower stratosphere
+ T = -70;
+ p = 473.1 * pow( e , 1.73 - (0.000048 * altitude) );
+
+ } else { // upper stratosphere
+ T = -205.05 + (0.00164 * altitude);
+ p = 51.97 * pow( ((T + 459.7) / 389.98) , -11.388);
+ }
+
+ rho = p / (1718 * (T + 459.7));
}
bool FGAIBase::init() {
SGPropertyNode *root = globals->get_props()->getNode("ai/models", true);
+
index = manager->getNum(_otype) - 1;
props = root->getNode(_type_str.c_str(), index, true);
+
if (model_path != "") {
model = sgLoad3DModel( globals->get_fg_root(),
model_path.c_str(),
void FGAIBase::bind() {
- props->tie("id", SGRawValuePointer<int>(&id));
+ props->tie("id", SGRawValueMethods<FGAIBase,int>(*this,
+ &FGAIBase::_getID));
props->tie("velocities/true-airspeed-kt", SGRawValuePointer<double>(&speed));
props->tie("velocities/vertical-speed-fps",
SGRawValueMethods<FGAIBase,double>(*this,
- FGAIBase::_getVS_fps,
- FGAIBase::_setVS_fps));
+ &FGAIBase::_getVS_fps,
+ &FGAIBase::_setVS_fps));
props->tie("position/altitude-ft",
SGRawValueMethods<FGAIBase,double>(*this,
- FGAIBase::_getAltitude,
- FGAIBase::_setAltitude));
+ &FGAIBase::_getAltitude,
+ &FGAIBase::_setAltitude));
props->tie("position/latitude-deg",
SGRawValueMethods<FGAIBase,double>(*this,
- FGAIBase::_getLatitude,
- FGAIBase::_setLatitude));
+ &FGAIBase::_getLatitude,
+ &FGAIBase::_setLatitude));
props->tie("position/longitude-deg",
SGRawValueMethods<FGAIBase,double>(*this,
- FGAIBase::_getLongitude,
- FGAIBase::_setLongitude));
+ &FGAIBase::_getLongitude,
+ &FGAIBase::_setLongitude));
props->tie("orientation/pitch-deg", SGRawValuePointer<double>(&pitch));
props->tie("orientation/roll-deg", SGRawValuePointer<double>(&roll));
props->tie("orientation/true-heading-deg", SGRawValuePointer<double>(&hdg));
+ props->tie("radar/in-range", SGRawValuePointer<bool>(&in_range));
props->tie("radar/bearing-deg", SGRawValuePointer<double>(&bearing));
props->tie("radar/elevation-deg", SGRawValuePointer<double>(&elevation));
props->tie("radar/range-nm", SGRawValuePointer<double>(&range));
props->tie("radar/rotation", SGRawValuePointer<double>(&rotation));
props->tie("controls/lighting/nav-lights",
- SGRawValueMethods<FGAIBase,bool>(*this, _isNight));
+ SGRawValueFunctions<bool>(_isNight));
props->setBoolValue("controls/lighting/beacon", true);
props->setBoolValue("controls/lighting/strobe", true);
}
props->untie("orientation/roll-deg");
props->untie("orientation/true-heading-deg");
+ props->untie("radar/in-range");
props->untie("radar/bearing-deg");
props->untie("radar/elevation-deg");
props->untie("radar/range-nm");
props->untie("controls/lighting/nav-lights");
}
+double FGAIBase::UpdateRadar(FGAIManager* manager)
+{
+ double radar_range_ft2 = fgGetDouble("/instrumentation/radar/range");
+ radar_range_ft2 *= SG_NM_TO_METER * SG_METER_TO_FEET * 1.1; // + 10%
+ radar_range_ft2 *= radar_range_ft2;
+
+ double user_latitude = manager->get_user_latitude();
+ double user_longitude = manager->get_user_longitude();
+ double lat_range = fabs(pos.lat() - user_latitude) * ft_per_deg_lat;
+ double lon_range = fabs(pos.lon() - user_longitude) * ft_per_deg_lon;
+ double range_ft2 = lat_range*lat_range + lon_range*lon_range;
+
+ //
+ // Test whether the target is within radar range.
+ //
+ in_range = (range_ft2 && (range_ft2 <= radar_range_ft2));
+ if ( in_range )
+ {
+ props->setBoolValue("radar/in-range", true);
+
+ // copy values from the AIManager
+ double user_altitude = manager->get_user_altitude();
+ double user_heading = manager->get_user_heading();
+ double user_pitch = manager->get_user_pitch();
+ double user_yaw = manager->get_user_yaw();
+ double user_speed = manager->get_user_speed();
+
+ // calculate range to target in feet and nautical miles
+ double range_ft = sqrt( range_ft2 );
+ range = range_ft / 6076.11549;
+
+ // calculate bearing to target
+ if (pos.lat() >= user_latitude) {
+ bearing = atan2(lat_range, lon_range) * SG_RADIANS_TO_DEGREES;
+ if (pos.lon() >= user_longitude) {
+ bearing = 90.0 - bearing;
+ } else {
+ bearing = 270.0 + bearing;
+ }
+ } else {
+ bearing = atan2(lon_range, lat_range) * SG_RADIANS_TO_DEGREES;
+ if (pos.lon() >= user_longitude) {
+ bearing = 180.0 - bearing;
+ } else {
+ bearing = 180.0 + bearing;
+ }
+ }
+
+ // calculate look left/right to target, without yaw correction
+ horiz_offset = bearing - user_heading;
+ if (horiz_offset > 180.0) horiz_offset -= 360.0;
+ if (horiz_offset < -180.0) horiz_offset += 360.0;
+
+ // calculate elevation to target
+ elevation = atan2( altitude * SG_METER_TO_FEET - user_altitude, range_ft )
+ * SG_RADIANS_TO_DEGREES;
+
+ // calculate look up/down to target
+ vert_offset = elevation + user_pitch;
+
+ /* this calculation needs to be fixed, but it isn't important anyway
+ // calculate range rate
+ double recip_bearing = bearing + 180.0;
+ if (recip_bearing > 360.0) recip_bearing -= 360.0;
+ double my_horiz_offset = recip_bearing - hdg;
+ if (my_horiz_offset > 180.0) my_horiz_offset -= 360.0;
+ if (my_horiz_offset < -180.0) my_horiz_offset += 360.0;
+ rdot = (-user_speed * cos( horiz_offset * SG_DEGREES_TO_RADIANS ))
+ +(-speed * 1.686 * cos( my_horiz_offset * SG_DEGREES_TO_RADIANS ));
+*/
+
+ // now correct look left/right for yaw
+ horiz_offset += user_yaw;
+
+ // calculate values for radar display
+ y_shift = range * cos( horiz_offset * SG_DEGREES_TO_RADIANS);
+ x_shift = range * sin( horiz_offset * SG_DEGREES_TO_RADIANS);
+ rotation = hdg - user_heading;
+ if (rotation < 0.0) rotation += 360.0;
+
+ }
+
+ return range_ft2;
+}
+
/*
* getters and Setters
setAltitude( _alt );
}
-bool FGAIBase::_isNight() const {
+bool FGAIBase::_isNight() {
return (fgGetFloat("/sim/time/sun-angle-rad") > 1.57);
}
+int FGAIBase::_getID() const {
+ return (int)(this);
+}
projects / flightgear.git / blobdiff