Durk Talsma:

[flightgear.git] / src / AIModel / AIBase.cxx

diff --git a/src/AIModel/AIBase.cxx b/src/AIModel/AIBase.cxx
index 3675bf6953fe33ca667e93e92e86e8d633dba549..e816b232b70d6c5561c472dd1c688ec34362a66f 100644 (file)
--- a/src/AIModel/AIBase.cxx
+++ b/src/AIModel/AIBase.cxx
@@ -50,10 +50,11 @@ const double FGAIBase::lbs_to_slugs = 0.031080950172;   //conversion factor
 
 
 FGAIBase::FGAIBase()
- :  fp( NULL ),
+  : fp( NULL ),
     model( NULL ),
     props( NULL ),
-    manager( NULL )
+    manager( NULL ),
+    _refID( _newAIModelID() )
 {
     _type_str = "model";
     tgt_heading = tgt_altitude = tgt_speed = 0.0;
@@ -81,6 +82,8 @@ FGAIBase::~FGAIBase() {
     root->removeChild(_type_str.c_str(), index);
     delete fp;
     fp = NULL;
+    ssgDeRefDelete(model);
+    model = 0;
 }
 
 void FGAIBase::update(double dt) {
@@ -99,7 +102,7 @@ void FGAIBase::Transform() {
       } else {
          aip.setOrientation(roll, pitch, hdg);
       }
-      aip.update( globals->get_scenery()->get_center() );    
+      aip.update();    
     }
 }
 
@@ -157,7 +160,6 @@ ssgBranch * FGAIBase::load3DModel(const string& fg_root,
                            prop_root,
                            sim_time_sec);
       manager->setModel(path, model);
-      model->ref();
     }
   //else
   //  {
@@ -166,6 +168,10 @@ ssgBranch * FGAIBase::load3DModel(const string& fg_root,
   //    aip.setVisible(false);
   //    globals->get_scenery()->get_scene_graph()->addKid(aip.getSceneGraph());
   // do some setModel stuff.
+  
+  if (model)
+    model->ref();
+
   return model;
 }
 
@@ -177,7 +183,7 @@ bool FGAIBase::isa( object_type otype ) {
 
 void FGAIBase::bind() {
    props->tie("id", SGRawValueMethods<FGAIBase,int>(*this,
-                                         &FGAIBase::_getID));
+                                         &FGAIBase::getID));
    props->tie("velocities/true-airspeed-kt",  SGRawValuePointer<double>(&speed));
    props->tie("velocities/vertical-speed-fps",
                SGRawValueMethods<FGAIBase,double>(*this,
@@ -397,8 +403,8 @@ bool FGAIBase::_isNight() {
     return (fgGetFloat("/sim/time/sun-angle-rad") > 1.57);
 }
 
-int FGAIBase::_getID() const {
-    return (int)(this);
+int FGAIBase::getID() const {
+    return  _refID;
 }
 
 void FGAIBase::CalculateMach() {
@@ -436,3 +442,9 @@ void FGAIBase::CalculateMach() {
  //    cout  << "Speed(ft/s) "<< speed <<" Altitude(ft) "<< altitude << " Mach " << Mach;
 }
 
+int FGAIBase::_newAIModelID() {
+   static int id = 0;
+   if (!++id) id++;    // id = 0 is not allowed.
+   return id;
+}
+