#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;
no_roll = true;
life = 900;
model_path = "";
- model = 0;
_otype = otNull;
index = 0;
- fp = (FGAIFlightPlan*)0;
delete_me = false;
- manager = NULL;
}
FGAIBase::~FGAIBase() {
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);
-}
+ ft_per_deg_lat = 366468.96 - 3717.12 * cos(pos.lat()*SGD_DEGREES_TO_RADIANS);
+ ft_per_deg_lon = 365228.16 * cos(pos.lat()*SGD_DEGREES_TO_RADIANS);
+
+ // 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));
+
+ // calculate the speed of sound at altitude
+ // a = sqrt ( g * R * (T + 459.7))
+ // where:
+ // a = speed of sound [ft/s]
+ // g = specific heat ratio, which is usually equal to 1.4
+ // R = specific gas constant, which equals 1716 ft-lb/slug/°R
+
+ a = sqrt ( 1.4 * 1716 * (T + 459.7));
+
+ // calculate Mach number
+
+ Mach = speed/a;
+
+// cout << "Speed(ft/s) "<< speed <<" Altitude(ft) "<< altitude << " Mach " << Mach;
+}
void FGAIBase::Transform() {
if (!invisible) {
props = root->getNode(_type_str.c_str(), index, true);
if (model_path != "") {
- model = sgLoad3DModel( globals->get_fg_root(),
+ model = load3DModel( globals->get_fg_root(),
model_path.c_str(),
props,
globals->get_sim_time_sec() );
return true;
}
+
+ssgBranch * FGAIBase::load3DModel(const string& fg_root,
+ const string &path,
+ SGPropertyNode *prop_root,
+ double sim_time_sec)
+{
+ // some more code here to check whether a model with this name has already been loaded
+ // if not load it, otherwise, get the memory pointer and do something like
+ // SetModel as in ATC/AIEntity.cxx
+ //SSGBranch *model;
+ model = manager->getModel(path);
+ if (!(model))
+ {
+ model = sgLoad3DModel(fg_root,
+ path,
+ prop_root,
+ sim_time_sec);
+ manager->setModel(path, model);
+ model->ref();
+ }
+ //else
+ // {
+ // model->ref();
+ // aip.init(model);
+ // aip.setVisible(false);
+ // globals->get_scenery()->get_scene_graph()->addKid(aip.getSceneGraph());
+ // do some setModel stuff.
+ return model;
+}
+
bool FGAIBase::isa( object_type otype ) {
if ( otype == _otype ) { return true; }
else { return false; }
SGRawValueFunctions<bool>(_isNight));
props->setBoolValue("controls/lighting/beacon", true);
props->setBoolValue("controls/lighting/strobe", true);
+ props->setBoolValue("controls/glide-path", true);
}
void FGAIBase::unbind() {