]> git.mxchange.org Git - flightgear.git/blobdiff - src/Main/main.cxx
I tested:
[flightgear.git] / src / Main / main.cxx
index 60f26a42422da4ce4e7b40d1f2cfacbf7b27c428..d9ec19b7215ff434c6bb656c882784db60f65bee 100644 (file)
@@ -21,9 +21,6 @@
 // $Id$
 
 
-#define MICHAEL_JOHNSON_EXPERIMENTAL_ENGINE_AUDIO
-
-
 #ifdef HAVE_CONFIG_H
 #  include <config.h>
 #endif
@@ -38,7 +35,8 @@
 #endif
 
 #include <GL/glut.h>
-#include <XGL/xgl.h>
+#include <simgear/xgl/xgl.h>
+
 #include <stdio.h>
 #include <string.h>
 #include <string>
 #  include <unistd.h>    /* for stat() */
 #endif
 
-#include <pu.h>                        // plib include
-#include <ssg.h>               // plib include
+#include <plib/pu.h>                   // plib include
+#include <plib/ssg.h>          // plib include
 
 #ifdef ENABLE_AUDIO_SUPPORT
-#  include <sl.h>              // plib include
-#  include <sm.h>              // plib include
+#  include <plib/sl.h>         // plib include
+#  include <plib/sm.h>         // plib include
 #endif
 
-#include <Include/fg_constants.h>  // for VERSION
+#include <simgear/constants.h>  // for VERSION
+#include <simgear/debug/logstream.hxx>
+#include <simgear/math/polar3d.hxx>
+#include <simgear/math/fg_random.h>
+#include <simgear/misc/fgpath.hxx>
+#include <simgear/sky/sky.hxx>
+#include <simgear/timing/sg_time.hxx>
+#include <simgear/timing/lowleveltime.h>
+
 #include <Include/general.hxx>
 
-#include <Debug/logstream.hxx>
 #include <Aircraft/aircraft.hxx>
-#include <Astro/sky.hxx>
-#include <Astro/stars.hxx>
-#include <Astro/solarsystem.hxx>
 
-#include <Autopilot/autopilot.hxx>
+#include <Autopilot/newauto.hxx>
 #include <Cockpit/cockpit.hxx>
+#include <Cockpit/radiostack.hxx>
+#include <Cockpit/steam.hxx>
+
+#include <FDM/UIUCModel/uiuc_aircraftdir.h>
 #include <GUI/gui.h>
 #include <Joystick/joystick.hxx>
-#include <Math/fg_geodesy.hxx>
-#include <Math/mat3.h>
-#include <Math/polar3d.hxx>
-#include <Math/fg_random.h>
-#include <Misc/fgpath.hxx>
 #ifdef FG_NETWORK_OLK
-#include <Network/network.h>
+#include <NetworkOLK/network.h>
 #endif
-#include <Objects/materialmgr.hxx>
 #include <Scenery/scenery.hxx>
 #include <Scenery/tilemgr.hxx>
 #include <Time/event.hxx>
-#include <Time/fg_time.hxx>
 #include <Time/fg_timer.hxx>
 #include <Time/sunpos.hxx>
-
-#ifndef FG_NEW_WEATHER
+#include <Time/tmp.hxx>
+
+// $$$ begin - added VS Renganathan
+#include <simgear/misc/fgstream.hxx>
+#include <FDM/flight.hxx>
+void fgLoadDCS (void);
+void fgUpdateDCS (void);
+ssgSelector *ship_sel = NULL;
+ssgTransform *ship_pos = NULL;
+//int totalDCSobj = 0;
+// $$$ end - added VS Renganathan
+
+#ifndef FG_OLD_WEATHER
+#  include <WeatherCM/FGLocalWeatherDatabase.h>
+#else
 #  include <Weather/weather.hxx>
 #endif
 
+#include "version.h"
+
+#include "bfi.hxx"
 #include "fg_init.hxx"
+#include "fg_io.hxx"
+#include "globals.hxx"
 #include "keyboard.hxx"
-#include "options.hxx"
 #include "splash.hxx"
-#include "views.hxx"
-#include "fg_serial.hxx"
 
 
 // -dw- use custom sioux settings so I can see output window
-#ifdef MACOS
+#ifdef macintosh
 #  ifndef FG_NDEBUG
 #    include <sioux.h> // settings for output window
 #  endif
@@ -120,10 +134,17 @@ FGGeneral general;
 // our initializations out of the glutIdleLoop() so that we can get a
 // splash screen up and running right away.
 static int idle_state = 0;
+static int global_multi_loop;
+
+// attempt to avoid a large bounce at startup
+static bool initial_freeze = true;
 
 // Another hack
 int use_signals = 0;
 
+// forward declaration
+void fgReshape( int width, int height );
+
 // Global structures for the Audio library
 #ifdef ENABLE_AUDIO_SUPPORT
 slEnvelope pitch_envelope ( 1, SL_SAMPLE_ONE_SHOT ) ;
@@ -141,6 +162,18 @@ ssgBranch *terrain = NULL;
 ssgSelector *penguin_sel = NULL;
 ssgTransform *penguin_pos = NULL;
 
+#ifdef FG_NETWORK_OLK
+ssgSelector *fgd_sel = NULL;
+ssgTransform *fgd_pos = NULL;
+//sgMat4 sgTUX;
+#endif
+
+// current fdm/position used for view
+FGInterface cur_view_fdm;
+
+// Sky structures
+SGSky *thesky;
+
 // hack
 sgMat4 copy_of_ssgOpenGLAxisSwapMatrix =
 {
@@ -150,7 +183,7 @@ sgMat4 copy_of_ssgOpenGLAxisSwapMatrix =
   {  0.0f,  0.0f,  0.0f,  1.0f }
 } ;
 
-// The following defines flight gear options. Because glutlib will also
+// The following defines flightgear options. Because glutlib will also
 // want to parse its own options, those options must not be included here
 // or they will get parsed by the main program option parser. Hence case
 // is significant for any option added that might be in conflict with
@@ -171,71 +204,105 @@ sgMat4 copy_of_ssgOpenGLAxisSwapMatrix =
 //
 
 
+ssgSimpleState *default_state;
+ssgSimpleState *hud_and_panel;
+ssgSimpleState *menus;
+
+void fgBuildRenderStates( void ) {
+    default_state = new ssgSimpleState;
+    default_state->ref();
+    default_state->disable( GL_TEXTURE_2D );
+    default_state->enable( GL_CULL_FACE );
+    default_state->enable( GL_COLOR_MATERIAL );
+    default_state->setColourMaterial( GL_AMBIENT_AND_DIFFUSE );
+    default_state->setMaterial( GL_EMISSION, 0, 0, 0, 1 );
+    default_state->setMaterial( GL_SPECULAR, 0, 0, 0, 1 );
+    default_state->disable( GL_BLEND );
+    default_state->disable( GL_ALPHA_TEST );
+    default_state->disable( GL_LIGHTING );
+
+    hud_and_panel = new ssgSimpleState;
+    hud_and_panel->ref();
+    hud_and_panel->disable( GL_CULL_FACE );
+    hud_and_panel->disable( GL_TEXTURE_2D );
+    hud_and_panel->disable( GL_LIGHTING );
+    hud_and_panel->enable( GL_BLEND );
+
+    menus = new ssgSimpleState;
+    menus->ref();
+    menus->disable( GL_CULL_FACE );
+    menus->disable( GL_TEXTURE_2D );
+    menus->enable( GL_BLEND );
+}
+
+
 // fgInitVisuals() -- Initialize various GL/view parameters
-static void fgInitVisuals( void ) {
+void fgInitVisuals( void ) {
     fgLIGHT *l;
 
     l = &cur_light_params;
 
 #ifndef GLUT_WRONG_VERSION
     // Go full screen if requested ...
-    if ( current_options.get_fullscreen() ) {
+    if ( globals->get_options()->get_fullscreen() ) {
        glutFullScreen();
     }
 #endif
 
     // If enabled, normal vectors specified with glNormal are scaled
     // to unit length after transformation.  See glNormal.
-    // xglEnable( GL_NORMALIZE );
+    // glEnable( GL_NORMALIZE );
 
-    xglEnable( GL_LIGHTING );
-    xglEnable( GL_LIGHT0 );
-    xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
+    glEnable( GL_LIGHTING );
+    glEnable( GL_LIGHT0 );
+    glLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
 
     sgVec3 sunpos;
     sgSetVec3( sunpos, l->sun_vec[0], l->sun_vec[1], l->sun_vec[2] );
     ssgGetLight( 0 ) -> setPosition( sunpos );
 
-    // xglFogi (GL_FOG_MODE, GL_LINEAR);
-    xglFogi (GL_FOG_MODE, GL_EXP2);
-    if ( (current_options.get_fog() == 1) || 
-        (current_options.get_shading() == 0) ) {
+    // glFogi (GL_FOG_MODE, GL_LINEAR);
+    glFogi (GL_FOG_MODE, GL_EXP2);
+    if ( (globals->get_options()->get_fog() == 1) || 
+        (globals->get_options()->get_shading() == 0) ) {
        // if fastest fog requested, or if flat shading force fastest
-       xglHint ( GL_FOG_HINT, GL_FASTEST );
-    } else if ( current_options.get_fog() == 2 ) {
-       xglHint ( GL_FOG_HINT, GL_NICEST );
+       glHint ( GL_FOG_HINT, GL_FASTEST );
+    } else if ( globals->get_options()->get_fog() == 2 ) {
+       glHint ( GL_FOG_HINT, GL_NICEST );
     }
-    if ( current_options.get_wireframe() ) {
+    if ( globals->get_options()->get_wireframe() ) {
        // draw wire frame
-       xglPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
+       glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
     }
 
     // This is the default anyways, but it can't hurt
-    xglFrontFace ( GL_CCW );
+    glFrontFace ( GL_CCW );
 
     // Just testing ...
-    // xglEnable(GL_POINT_SMOOTH);
-    // xglEnable(GL_LINE_SMOOTH);
-    // xglEnable(GL_POLYGON_SMOOTH);      
+    // glEnable(GL_POINT_SMOOTH);
+    // glEnable(GL_LINE_SMOOTH);
+    // glEnable(GL_POLYGON_SMOOTH);      
 }
 
 
 // Update all Visuals (redraws anything graphics related)
-static void fgRenderFrame( void ) {
+void fgRenderFrame( void ) {
+    // Update the BFI.
+    FGBFI::update();
+
     fgLIGHT *l = &cur_light_params;
-    FGTime *t = FGTime::cur_time_params;
-    // FGView *v = &current_view;
+    static double last_visibility = -9999;
 
     double angle;
     // GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
-    GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
-    GLfloat terrain_color[4] = { 0.54, 0.44, 0.29, 1.0 };
+    // GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
+    // GLfloat terrain_color[4] = { 0.54, 0.44, 0.29, 1.0 };
     // GLfloat mat_shininess[] = { 10.0 };
     GLbitfield clear_mask;
-
+    
     if ( idle_state != 1000 ) {
        // still initializing, draw the splash screen
-       if ( current_options.get_splash_screen() == 1 ) {
+       if ( globals->get_options()->get_splash_screen() == 1 ) {
            fgSplashUpdate(0.0);
        }
     } else {
@@ -251,19 +318,31 @@ static void fgRenderFrame( void ) {
        // end of hack
 
        // update view volume parameters
-       current_view.UpdateViewParams(cur_fdm_state);
+       // cout << "before pilot_view update" << endl;
+        if ( globals->get_options()->get_view_mode()
+            == FGOptions::FG_VIEW_FOLLOW )
+       {
+           float * offset = globals->get_pilot_view()->get_pilot_offset();
+           globals->get_current_view()->set_pilot_offset( offset[0],
+                                                          offset[1],
+                                                          offset[2] );
+       } else {
+           globals->get_current_view()->set_pilot_offset(0.0, 0.0, 0.0);
+       }
+       globals->get_pilot_view()->UpdateViewParams(*cur_fdm_state);
+       // cout << "after pilot_view update" << endl;
+       globals->get_current_view()->UpdateViewParams(cur_view_fdm);
 
        // set the sun position
-       xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
+       glLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
 
        clear_mask = GL_DEPTH_BUFFER_BIT;
-       if ( current_options.get_wireframe() ) {
+       if ( globals->get_options()->get_wireframe() ) {
            clear_mask |= GL_COLOR_BUFFER_BIT;
        }
-       if ( current_options.get_panel_status() ) {
-           // we can't clear the screen when the panel is active
-       } else if ( current_options.get_skyblend() ) {
-           if ( current_options.get_textures() ) {
+
+       if ( globals->get_options()->get_skyblend() ) {
+           if ( globals->get_options()->get_textures() ) {
                // glClearColor(black[0], black[1], black[2], black[3]);
                glClearColor(l->adj_fog_color[0], l->adj_fog_color[1], 
                             l->adj_fog_color[2], l->adj_fog_color[3]);
@@ -274,96 +353,160 @@ static void fgRenderFrame( void ) {
                         l->sky_color[2], l->sky_color[3]);
            clear_mask |= GL_COLOR_BUFFER_BIT;
        }
-       xglClear( clear_mask );
+       glClear( clear_mask );
 
        // Tell GL we are switching to model view parameters
 
        // I really should create a derived ssg node or use a call
        // back or something so that I can draw the sky within the
-       // ssgCullandDraw() function, but for now I just mimic what
+       // ssgCullAndDraw() function, but for now I just mimic what
        // ssg does to set up the model view matrix
-       xglMatrixMode(GL_MODELVIEW);
-       xglLoadIdentity();
+       glMatrixMode(GL_MODELVIEW);
+       glLoadIdentity();
+       ssgSetCamera( (sgMat4)globals->get_current_view()->get_VIEW() );
+
+       /*
        sgMat4 vm_tmp, view_mat;
        sgTransposeNegateMat4 ( vm_tmp, current_view.VIEW ) ;
        sgCopyMat4( view_mat, copy_of_ssgOpenGLAxisSwapMatrix ) ;
        sgPreMultMat4( view_mat, vm_tmp ) ;
-       xglLoadMatrixf( (float *)view_mat );
-
-       // draw sky
-       xglDisable( GL_DEPTH_TEST );
-       xglDisable( GL_LIGHTING );
-       xglDisable( GL_CULL_FACE );
-       xglDisable( GL_FOG );
-       xglShadeModel( GL_SMOOTH );
-       if ( current_options.get_skyblend() ) {
-           fgSkyRender();
-       }
+       glLoadMatrixf( (float *)view_mat );
+       */
 
-       // setup transformation for drawing astronomical objects
-       xglPushMatrix();
-       // Translate to view position
-       Point3D view_pos = current_view.get_view_pos();
-       xglTranslatef( view_pos.x(), view_pos.y(), view_pos.z() );
-       // Rotate based on gst (sidereal time)
-       // note: constant should be 15.041085, Curt thought it was 15
-       angle = t->getGst() * 15.041085;
-       // printf("Rotating astro objects by %.2f degrees\n",angle);
-       xglRotatef( angle, 0.0, 0.0, -1.0 );
-
-       // draw stars and planets
-       fgStarsRender();
-       xglDisable( GL_COLOR_MATERIAL ); // just to make sure ...
-       xglEnable( GL_CULL_FACE ); // for moon
-       xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
-       //xglEnable(GL_DEPTH_TEST);
-       SolarSystem::theSolarSystem->draw();
-
-       xglPopMatrix();
-
-       // draw scenery
-       if ( current_options.get_shading() ) {
-           xglShadeModel( GL_SMOOTH ); 
-       } else {
-           xglShadeModel( GL_FLAT ); 
+       // set the opengl state to known default values
+       default_state->force();
+
+       // update fog params if visibility has changed
+#ifndef FG_OLD_WEATHER
+       thesky->set_visibility( WeatherDatabase->getWeatherVisibility() );
+#else
+       thesky->set_visibility( current_weather.get_visibility() );
+#endif
+
+       thesky->modify_vis( cur_fdm_state->get_Altitude() * FEET_TO_METER,
+                               
+                           ( global_multi_loop * 
+                             globals->get_options()->get_speed_up() ) /
+                           (double)globals->get_options()->get_model_hz() );
+
+       double actual_visibility = thesky->get_visibility();
+       // cout << "actual visibility = " << actual_visibility << endl;
+
+       if ( actual_visibility != last_visibility ) {
+           last_visibility = actual_visibility;
+
+           // cout << "----> updating fog params" << endl;
+               
+           GLfloat fog_exp_density;
+           GLfloat fog_exp2_density;
+    
+           // for GL_FOG_EXP
+           fog_exp_density = -log(0.01 / actual_visibility);
+    
+           // for GL_FOG_EXP2
+           fog_exp2_density = sqrt( -log(0.01) ) / actual_visibility;
+    
+           // Set correct opengl fog density
+           glFogf (GL_FOG_DENSITY, fog_exp2_density);
        }
-       xglEnable( GL_DEPTH_TEST );
-       if ( current_options.get_fog() > 0 ) {
-           xglEnable( GL_FOG );
-           xglFogi( GL_FOG_MODE, GL_EXP2 );
-           xglFogfv( GL_FOG_COLOR, l->adj_fog_color );
+       // update the sky dome
+       if ( globals->get_options()->get_skyblend() ) {
+           sgVec3 view_pos;
+           sgSetVec3( view_pos,
+                      globals->get_current_view()->get_view_pos().x(),
+                      globals->get_current_view()->get_view_pos().y(),
+                      globals->get_current_view()->get_view_pos().z() );
+
+           sgVec3 zero_elev;
+           sgSetVec3( zero_elev,
+                      globals->get_current_view()->get_cur_zero_elev().x(),
+                      globals->get_current_view()->get_cur_zero_elev().y(),
+                      globals->get_current_view()->get_cur_zero_elev().z() );
+
+           /* cout << "thesky->repaint() sky_color = "
+                << cur_light_params.sky_color[0] << " "
+                << cur_light_params.sky_color[1] << " "
+                << cur_light_params.sky_color[2] << " "
+                << cur_light_params.sky_color[3] << endl;
+           cout << "    fog = "
+                << cur_light_params.fog_color[0] << " "
+                << cur_light_params.fog_color[1] << " "
+                << cur_light_params.fog_color[2] << " "
+                << cur_light_params.fog_color[3] << endl;
+           cout << "    sun_angle = " << cur_light_params.sun_angle
+                << "    moon_angle = " << cur_light_params.moon_angle
+                 << endl; */
+           thesky->repaint( cur_light_params.sky_color,
+                            cur_light_params.adj_fog_color,
+                            cur_light_params.sun_angle,
+                            cur_light_params.moon_angle,
+                            globals->get_ephem()->getNumPlanets(),
+                            globals->get_ephem()->getPlanets(),
+                            globals->get_ephem()->getNumStars(),
+                            globals->get_ephem()->getStars() );
+           /* cout << "thesky->reposition( view_pos = " << view_pos[0] << " "
+                << view_pos[1] << " " << view_pos[2] << endl;
+           cout << "    zero_elev = " << zero_elev[0] << " "
+                << zero_elev[1] << " " << zero_elev[2]
+                << " lon = " << cur_fdm_state->get_Longitude()
+                << " lat = " << cur_fdm_state->get_Latitude() << endl;
+           cout << "    sun_rot = " << cur_light_params.sun_rotation
+                << " gst = " << SGTime::cur_time_params->getGst() << endl;
+           cout << "    sun ra = " << globals->get_ephem()->getSunRightAscension()
+                << " sun dec = " << globals->get_ephem()->getSunDeclination() 
+                << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
+                << " moon dec = " << globals->get_ephem()->getMoonDeclination() << endl; */
+
+           thesky->reposition( view_pos, zero_elev,
+                               globals->get_current_view()->get_local_up(),
+                               cur_fdm_state->get_Longitude(),
+                               cur_fdm_state->get_Latitude(),
+                               cur_fdm_state->get_Altitude() * FEET_TO_METER,
+                               cur_light_params.sun_rotation,
+                               globals->get_time_params()->getGst(),
+                               globals->get_ephem()->getSunRightAscension(),
+                               globals->get_ephem()->getSunDeclination(),
+                               50000.0,
+                               globals->get_ephem()->getMoonRightAscension(),
+                               globals->get_ephem()->getMoonDeclination(),
+                               50000.0 );
        }
-       // set lighting parameters
-       xglLightfv( GL_LIGHT0, GL_AMBIENT, l->scene_ambient );
-       xglLightfv( GL_LIGHT0, GL_DIFFUSE, l->scene_diffuse );
-       // xglLightfv(GL_LIGHT0, GL_SPECULAR, white );
-       
-       if ( current_options.get_textures() ) {
-           // texture parameters
-           xglEnable( GL_TEXTURE_2D );
-           xglTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
-           xglHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
-           // set base color (I don't think this is doing anything here)
-           xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
-           xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
-           // xglMaterialfv (GL_FRONT, GL_SPECULAR, white);
-           // xglMaterialfv (GL_FRONT, GL_SHININESS, mat_shininess);
-       } else {
-           xglDisable( GL_TEXTURE_2D );
-           xglMaterialfv (GL_FRONT, GL_AMBIENT, terrain_color);
-           xglMaterialfv (GL_FRONT, GL_DIFFUSE, terrain_color);
-           // xglMaterialfv (GL_FRONT, GL_AMBIENT, white);
-           // xglMaterialfv (GL_FRONT, GL_DIFFUSE, white);
+
+       glEnable( GL_DEPTH_TEST );
+       if ( globals->get_options()->get_fog() > 0 ) {
+           glEnable( GL_FOG );
+           glFogi( GL_FOG_MODE, GL_EXP2 );
+           glFogfv( GL_FOG_COLOR, l->adj_fog_color );
        }
 
+       // set lighting parameters
+       GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
+       glLightModelfv( GL_LIGHT_MODEL_AMBIENT, l->scene_ambient );
+       glLightfv( GL_LIGHT0, GL_AMBIENT, black );
+       glLightfv( GL_LIGHT0, GL_DIFFUSE, l->scene_diffuse );
+       // glLightfv(GL_LIGHT0, GL_SPECULAR, white );
+
+       // texture parameters
+       // glEnable( GL_TEXTURE_2D );
+       glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
+       glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
+       // set base color (I don't think this is doing anything here)
+       // glMaterialfv (GL_FRONT, GL_AMBIENT, white);
+       //  (GL_FRONT, GL_DIFFUSE, white);
+       // glMaterialfv (GL_FRONT, GL_SPECULAR, white);
+       // glMaterialfv (GL_FRONT, GL_SHININESS, mat_shininess);
+
        sgVec3 sunpos;
        sgSetVec3( sunpos, l->sun_vec[0], l->sun_vec[1], l->sun_vec[2] );
        ssgGetLight( 0 ) -> setPosition( sunpos );
 
-       // xglMatrixMode( GL_PROJECTION );
-       // xglLoadIdentity();
-       float fov = current_options.get_fov();
-       ssgSetFOV(fov * current_view.get_win_ratio(), fov);
+       // glMatrixMode( GL_PROJECTION );
+       // glLoadIdentity();
+       float fov = globals->get_options()->get_fov();
+       // ssgSetFOV(fov * current_view.get_win_ratio(), fov);
+       ssgSetFOV(fov, fov * globals->get_current_view()->get_win_ratio());
 
        double agl = current_aircraft.fdm_state->get_Altitude() * FEET_TO_METER
            - scenery.cur_elev;
@@ -372,26 +515,18 @@ static void fgRenderFrame( void ) {
        //         << current_weather.get_visibility() );
            
        if ( agl > 10.0 ) {
-           ssgSetNearFar( 10.0f, 100000.0f );
+           ssgSetNearFar( 10.0f, 120000.0f );
        } else {
-           ssgSetNearFar( 0.5f, 100000.0f );
+           ssgSetNearFar( 0.5f, 120000.0f );
        }
 
-       // sgMat4 sgVIEW;
-       // while ( current_view.follow.size() > 25 ) {
-       //    current_view.follow.pop_front();
-       // }
-
-       if ( current_options.get_view_mode() == 
-            fgOPTIONS::FG_VIEW_FIRST_PERSON )
+       if ( globals->get_options()->get_view_mode() == 
+            FGOptions::FG_VIEW_PILOT )
         {
-           // select current view matrix
-           // sgCopyMat4( sgVIEW, current_view.sgVIEW );
-
            // disable TuX
            penguin_sel->select(0);
-       } else if ( current_options.get_view_mode() == 
-                   fgOPTIONS::FG_VIEW_FOLLOW )
+       } else if ( globals->get_options()->get_view_mode() == 
+                   FGOptions::FG_VIEW_FOLLOW )
         {
            // select view matrix from front of view matrix queue
            // FGMat4Wrapper tmp = current_view.follow.front();
@@ -402,9 +537,9 @@ static void fgRenderFrame( void ) {
 
            sgMat4 sgTRANS;
            sgMakeTransMat4( sgTRANS, 
-                            current_view.view_pos.x(),
-                            current_view.view_pos.y(),
-                            current_view.view_pos.z() );
+                            globals->get_pilot_view()->get_view_pos().x(),
+                            globals->get_pilot_view()->get_view_pos().y(),
+                            globals->get_pilot_view()->get_view_pos().z() );
 
            sgVec3 ownship_up;
            sgSetVec3( ownship_up, 0.0, 0.0, 1.0);
@@ -412,58 +547,98 @@ static void fgRenderFrame( void ) {
            sgMat4 sgROT;
            sgMakeRotMat4( sgROT, -90.0, ownship_up );
 
-           sgMat4 sgTMP;
+           // sgMat4 sgTMP;
+           // sgMat4 sgTUX;
+           // sgMultMat4( sgTMP, sgROT, pilot_view.VIEW_ROT );
+           // sgMultMat4( sgTUX, sgTMP, sgTRANS );
+
+           // sgTUX = ( sgROT * pilot_view.VIEW_ROT ) * sgTRANS
            sgMat4 sgTUX;
-           sgMultMat4( sgTMP, sgROT, current_view.VIEW_ROT );
-           sgMultMat4( sgTUX, sgTMP, sgTRANS );
+           sgCopyMat4( sgTUX, sgROT );
+           sgPostMultMat4( sgTUX, globals->get_pilot_view()->get_VIEW_ROT() );
+           sgPostMultMat4( sgTUX, sgTRANS );
        
            sgCoord tuxpos;
            sgSetCoord( &tuxpos, sgTUX );
            penguin_pos->setTransform( &tuxpos );
        }
 
-       ssgSetCamera( current_view.VIEW );
+       // $$$ begin - added VS Renganthan 17 Oct 2K
+       fgUpdateDCS();
+       // $$$ end - added VS Renganthan 17 Oct 2K
+
+# ifdef FG_NETWORK_OLK
+       if ( globals->get_options()->get_network_olk() ) {
+           sgCoord fgdpos;
+           other = head->next;             /* put listpointer to start  */
+           while ( other != tail) {        /* display all except myself */
+               if ( strcmp( other->ipadr, fgd_mcp_ip) != 0) {
+                   other->fgd_sel->select(1);
+                   sgSetCoord( &fgdpos, other->sgFGD_COORD );
+                   other->fgd_pos->setTransform( &fgdpos );
+               }
+               other = other->next;
+           }
+
+           // fgd_sel->select(1);
+           // sgCopyMat4( sgTUX, current_view.sgVIEW);
+           // sgCoord fgdpos;
+           // sgSetCoord( &fgdpos, sgFGD_VIEW );
+           // fgd_pos->setTransform( &fgdpos);
+       }
+# endif
+
+       // ssgSetCamera( current_view.VIEW );
 
        // position tile nodes and update range selectors
        global_tile_mgr.prep_ssg_nodes();
 
        // force the default state so ssg can get back on track if
-       // we've changed things elsewhere
-       FGMaterialSlot m_slot;
-       FGMaterialSlot *m_ptr = &m_slot;
-       if ( material_mgr.find( "Default", m_ptr ) );
-       m_ptr->get_state()->force();
+       // we've changed things elsewhere (this is now handled
+       // differently)
+       // 
+       // FGMaterialSlot m_slot;
+       // FGMaterialSlot *m_ptr = &m_slot;
+       // if ( material_mgr.find( "Default", m_ptr ) ) {
+       //    m_ptr->get_state()->force();
+       // }
+
+       // draw the sky backdrop
+       thesky->preDraw();
 
        // draw the ssg scene
+       glEnable( GL_DEPTH_TEST );
        ssgCullAndDraw( scene );
 
-       xglDisable( GL_TEXTURE_2D );
-       xglDisable( GL_FOG );
+       // draw the sky cloud layers
+       thesky->postDraw( cur_fdm_state->get_Altitude() * FEET_TO_METER );
 
        // display HUD && Panel
-       xglDisable( GL_CULL_FACE );
+       glDisable( GL_FOG );
+       glDisable( GL_DEPTH_TEST );
+       // glDisable( GL_CULL_FACE );
+       // glDisable( GL_TEXTURE_2D );
+       hud_and_panel->apply();
        fgCockpitUpdate();
 
        // We can do translucent menus, so why not. :-)
-       xglEnable    ( GL_BLEND ) ;
-       xglBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
+       // glEnable ( GL_BLEND ) ;
+       menus->apply();
+       glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
        puDisplay();
-       xglDisable   ( GL_BLEND ) ;
-       xglEnable( GL_FOG );
+       // glDisable ( GL_BLEND ) ;
 
+       // glEnable( GL_FOG );
     }
 
-    xglutSwapBuffers();
+    glutSwapBuffers();
 }
 
 
 // Update internal time dependent calculations (i.e. flight model)
 void fgUpdateTimeDepCalcs(int multi_loop, int remainder) {
     static fdm_state_list fdm_list;
-    FGInterface fdm_state;
     fgLIGHT *l = &cur_light_params;
-    FGTime *t = FGTime::cur_time_params;
-    // FGView *v = &current_view;
     int i;
 
     // update the flight model
@@ -471,71 +646,84 @@ void fgUpdateTimeDepCalcs(int multi_loop, int remainder) {
        multi_loop = 1;
     }
 
-    fdm_state = cur_fdm_state;
-
-    if ( !t->getPause() ) {
+    if ( !globals->get_freeze() && !initial_freeze ) {
        // run Autopilot system
-       fgAPRun();
+       current_autopilot->run();
 
        // printf("updating flight model x %d\n", multi_loop);
-       fgFDMUpdate( current_options.get_flight_model(), 
+       /* fgFDMUpdate( globals->get_options()->get_flight_model(), 
                     fdm_state, 
-                    multi_loop * current_options.get_speed_up(),
-                    remainder );
+                    multi_loop * globals->get_options()->get_speed_up(),
+                    remainder ); */
+       cur_fdm_state->update( multi_loop *
+                              globals->get_options()->get_speed_up() );
+       FGSteam::update( multi_loop * globals->get_options()->get_speed_up() );
     } else {
-       fgFDMUpdate( current_options.get_flight_model(), 
-                    fdm_state, 0, remainder );
+       // fgFDMUpdate( globals->get_options()->get_flight_model(), 
+       //              fdm_state, 0, remainder );
+       cur_fdm_state->update( 0 );
+       FGSteam::update( 0 );
+
+       if ( global_tile_mgr.queue_size() == 0 ) {
+           initial_freeze = false;
+       }
     }
 
-    fdm_list.push_back( fdm_state );
-    while ( fdm_list.size() > 25 ) {
+    fdm_list.push_back( *cur_fdm_state );
+    while ( fdm_list.size() > 15 ) {
        fdm_list.pop_front();
     }
 
-    if ( current_options.get_view_mode() == fgOPTIONS::FG_VIEW_FIRST_PERSON ) {
-       cur_fdm_state = fdm_state;
-    } else if ( current_options.get_view_mode() == fgOPTIONS::FG_VIEW_FOLLOW ) {
-       cur_fdm_state = fdm_list.front();
+    if ( globals->get_options()->get_view_mode() == FGOptions::FG_VIEW_PILOT ) {
+       cur_view_fdm = *cur_fdm_state;
+       // do nothing
+    } else if ( globals->get_options()->get_view_mode()
+               == FGOptions::FG_VIEW_FOLLOW )
+    {
+       cur_view_fdm = fdm_list.front();
     }
 
     // update the view angle
     for ( i = 0; i < multi_loop; i++ ) {
-       if ( fabs(current_view.get_goal_view_offset() - 
-                 current_view.get_view_offset()) < 0.05 )
+       if ( fabs(globals->get_current_view()->get_goal_view_offset() - 
+                 globals->get_current_view()->get_view_offset()) < 0.05 )
        {
-           current_view.set_view_offset( current_view.get_goal_view_offset() );
+           globals->get_current_view()->set_view_offset( globals->get_current_view()->get_goal_view_offset() );
            break;
        } else {
-           // move current_view.view_offset towards current_view.goal_view_offset
-           if ( current_view.get_goal_view_offset() > 
-                current_view.get_view_offset() )
+           // move current_view.view_offset towards
+           // current_view.goal_view_offset
+           if ( globals->get_current_view()->get_goal_view_offset() > 
+                globals->get_current_view()->get_view_offset() )
             {
-               if ( current_view.get_goal_view_offset() - 
-                    current_view.get_view_offset() < FG_PI )
+               if ( globals->get_current_view()->get_goal_view_offset() - 
+                    globals->get_current_view()->get_view_offset() < FG_PI )
                 {
-                   current_view.inc_view_offset( 0.01 );
+                   globals->get_current_view()->inc_view_offset( 0.01 );
                } else {
-                   current_view.inc_view_offset( -0.01 );
+                   globals->get_current_view()->inc_view_offset( -0.01 );
                }
            } else {
-               if ( current_view.get_view_offset() - 
-                    current_view.get_goal_view_offset() < FG_PI )
+               if ( globals->get_current_view()->get_view_offset() - 
+                    globals->get_current_view()->get_goal_view_offset() <
+                    FG_PI )
                 {
-                   current_view.inc_view_offset( -0.01 );
+                   globals->get_current_view()->inc_view_offset( -0.01 );
                } else {
-                   current_view.inc_view_offset( 0.01 );
+                   globals->get_current_view()->inc_view_offset( 0.01 );
                }
            }
-           if ( current_view.get_view_offset() > FG_2PI ) {
-               current_view.inc_view_offset( -FG_2PI );
-           } else if ( current_view.get_view_offset() < 0 ) {
-               current_view.inc_view_offset( FG_2PI );
+           if ( globals->get_current_view()->get_view_offset() > FG_2PI ) {
+               globals->get_current_view()->inc_view_offset( -FG_2PI );
+           } else if ( globals->get_current_view()->get_view_offset() < 0 ) {
+               globals->get_current_view()->inc_view_offset( FG_2PI );
            }
        }
     }
 
     double tmp = -(l->sun_rotation + FG_PI) 
-       - (cur_fdm_state.get_Psi() - current_view.get_view_offset() );
+       - (cur_fdm_state->get_Psi() -
+          globals->get_current_view()->get_view_offset() );
     while ( tmp < 0.0 ) {
        tmp += FG_2PI;
     }
@@ -546,6 +734,16 @@ void fgUpdateTimeDepCalcs(int multi_loop, int remainder) {
           FG_Psi * RAD_TO_DEG, current_view.view_offset * RAD_TO_DEG, 
           -(l->sun_rotation+FG_PI) * RAD_TO_DEG, tmp * RAD_TO_DEG); */
     l->UpdateAdjFog();
+
+    // Update solar system
+    globals->get_ephem()->update( globals->get_time_params()->getMjd(),
+                                 globals->get_time_params()->getLst(),
+                                 cur_fdm_state->get_Latitude() );
+
+    // Update radio stack model
+    current_radiostack->update( cur_fdm_state->get_Longitude(),
+                               cur_fdm_state->get_Latitude(),
+                               cur_fdm_state->get_Altitude() * FEET_TO_METER );
 }
 
 
@@ -553,7 +751,7 @@ void fgInitTimeDepCalcs( void ) {
     // initialize timer
 
     // #ifdef HAVE_SETITIMER
-    //   fgTimerInit( 1.0 / current_options.get_model_hz(), 
+    //   fgTimerInit( 1.0 / globals->get_options()->get_model_hz(), 
     //                fgUpdateTimeDepCalcs );
     // #endif HAVE_SETITIMER
 }
@@ -566,9 +764,8 @@ static const double alt_adjust_m = alt_adjust_ft * FEET_TO_METER;
 // What should we do when we have nothing else to do?  Let's get ready
 // for the next move and update the display?
 static void fgMainLoop( void ) {
-    FGTime *t;
     static long remainder = 0;
-    long elapsed, multi_loop;
+    long elapsed;
 #ifdef FANCY_FRAME_COUNTER
     int i;
     double accum;
@@ -577,14 +774,25 @@ static void fgMainLoop( void ) {
     static int frames = 0;
 #endif // FANCY_FRAME_COUNTER
 
-    t = FGTime::cur_time_params;
+    SGTime *t = globals->get_time_params();
 
     FG_LOG( FG_ALL, FG_DEBUG, "Running Main Loop");
     FG_LOG( FG_ALL, FG_DEBUG, "======= ==== ====");
 
+#ifdef FG_NETWORK_OLK
+    if ( globals->get_options()->get_network_olk() ) {
+       if ( net_is_registered == 0 ) {      // We first have to reg. to fgd
+           // printf("FGD: Netupdate\n");
+           fgd_send_com( "A", FGFS_host);   // Send Mat4 data
+           fgd_send_com( "B", FGFS_host);   // Recv Mat4 data
+       }
+    }
+#endif
+
 #if defined( ENABLE_PLIB_JOYSTICK )
     // Read joystick and update control settings
-    if ( current_options.get_control_mode() == fgOPTIONS::FG_JOYSTICK ) {
+    if ( globals->get_options()->get_control_mode() == FGOptions::FG_JOYSTICK )
+    {
        fgJoystickRead();
     }
 #elif defined( ENABLE_GLUT_JOYSTICK )
@@ -593,7 +801,7 @@ static void fgMainLoop( void ) {
     // init routine and we don't have to worry about it again.
 #endif
 
-#ifndef FG_NEW_WEATHER
+#ifdef FG_OLD_WEATHER
     current_weather.Update();
 #endif
 
@@ -602,35 +810,52 @@ static void fgMainLoop( void ) {
 
     /* printf("Before - ground = %.2f  runway = %.2f  alt = %.2f\n",
           scenery.cur_elev,
-          cur_fdm_state.get_Runway_altitude() * FEET_TO_METER,
-          cur_fdm_state.get_Altitude() * FEET_TO_METER); */
+          cur_fdm_state->get_Runway_altitude() * FEET_TO_METER,
+          cur_fdm_state->get_Altitude() * FEET_TO_METER); */
 
     if ( scenery.cur_elev > -9990 ) {
-       if ( cur_fdm_state.get_Altitude() * FEET_TO_METER < 
+       if ( cur_fdm_state->get_Altitude() * FEET_TO_METER < 
             (scenery.cur_elev + alt_adjust_m - 3.0) ) {
            // now set aircraft altitude above ground
-           printf("Current Altitude = %.2f < %.2f forcing to %.2f\n", 
-                  cur_fdm_state.get_Altitude() * FEET_TO_METER,
+           printf("(*) Current Altitude = %.2f < %.2f forcing to %.2f\n", 
+                  cur_fdm_state->get_Altitude() * FEET_TO_METER,
                   scenery.cur_elev + alt_adjust_m - 3.0,
                   scenery.cur_elev + alt_adjust_m );
-           fgFDMForceAltitude( current_options.get_flight_model(), 
+           fgFDMForceAltitude( globals->get_options()->get_flight_model(), 
                                scenery.cur_elev + alt_adjust_m );
 
            FG_LOG( FG_ALL, FG_DEBUG, 
                    "<*> resetting altitude to " 
-                   << cur_fdm_state.get_Altitude() * FEET_TO_METER << " meters" );
+                   << cur_fdm_state->get_Altitude() * FEET_TO_METER
+                   << " meters" );
        }
-       fgFDMSetGroundElevation( current_options.get_flight_model(),
-                                scenery.cur_elev );  // meters
+       //fgFDMSetGroundElevation( globals->get_options()->get_flight_model(),
+       //                       scenery.cur_elev );  // meters
     }
 
     /* printf("Adjustment - ground = %.2f  runway = %.2f  alt = %.2f\n",
           scenery.cur_elev,
-          cur_fdm_state.get_Runway_altitude() * FEET_TO_METER,
-          cur_fdm_state.get_Altitude() * FEET_TO_METER); */
+          cur_fdm_state->get_Runway_altitude() * FEET_TO_METER,
+          cur_fdm_state->get_Altitude() * FEET_TO_METER); */
 
     // update "time"
-    t->update(cur_fdm_state);
+    if ( globals->get_warp_delta() != 0 ) {
+       globals->inc_warp( globals->get_warp_delta() );
+    }
+
+    t->update( cur_fdm_state->get_Longitude(),
+              cur_fdm_state->get_Latitude(),
+              globals->get_warp() );
+
+    if ( globals->get_warp_delta() != 0 ) {
+       fgUpdateSkyAndLightingParams();
+    }
+
+    // update magvar model
+    globals->get_mag()->update( cur_fdm_state->get_Longitude(),
+                               cur_fdm_state->get_Latitude(),
+                               cur_fdm_state->get_Altitude()* FEET_TO_METER,
+                               globals->get_time_params()->getJD() );
 
     // Get elapsed time (in usec) for this past frame
     elapsed = fgGetTimeInterval();
@@ -673,96 +898,84 @@ static void fgMainLoop( void ) {
        // Calculate model iterations needed for next frame
        elapsed += remainder;
 
-       multi_loop = (int)(((double)elapsed * 0.000001) * 
-                          current_options.get_model_hz());
-       remainder = elapsed - ( (multi_loop*1000000) / 
-                               current_options.get_model_hz() );
+       global_multi_loop = (int)(((double)elapsed * 0.000001) * 
+                          globals->get_options()->get_model_hz());
+       remainder = elapsed - ( (global_multi_loop*1000000) / 
+                               globals->get_options()->get_model_hz() );
        FG_LOG( FG_ALL, FG_DEBUG, 
-               "Model iterations needed = " << multi_loop
+               "Model iterations needed = " << global_multi_loop
                << ", new remainder = " << remainder );
        
        // flight model
-       if ( multi_loop > 0 ) {
-           fgUpdateTimeDepCalcs(multi_loop, remainder);
+       if ( global_multi_loop > 0 ) {
+           fgUpdateTimeDepCalcs(global_multi_loop, remainder);
        } else {
            FG_LOG( FG_ALL, FG_DEBUG, 
                    "Elapsed time is zero ... we're zinging" );
        }
     }
 
-#if ! defined( MACOS )
-    // Do any serial port work that might need to be done
-    fgSerialProcess();
+#if ! defined( macintosh )
+    // Do any I/O channel work that might need to be done
+    fgIOProcess();
 #endif
 
     // see if we need to load any new scenery tiles
-    global_tile_mgr.update();
+    global_tile_mgr.update( cur_fdm_state->get_Longitude() * RAD_TO_DEG,
+                           cur_fdm_state->get_Latitude() * RAD_TO_DEG );
 
     // Process/manage pending events
     global_events.Process();
 
     // Run audio scheduler
 #ifdef ENABLE_AUDIO_SUPPORT
-    if ( current_options.get_sound() && !audio_sched->not_working() ) {
-
-#   ifdef MICHAEL_JOHNSON_EXPERIMENTAL_ENGINE_AUDIO
-
-       // note: all these factors are relative to the sample.  our
-       // sample format should really contain a conversion factor so
-       // that we can get prop speed right for arbitrary samples.
-       // Note that for normal-size props, there is a point at which
-       // the prop tips approach the speed of sound; that is a pretty
-       // strong limit to how fast the prop can go.
-
-       // multiplication factor is prime pitch control; add some log
-       // component for verisimilitude
-
-       double pitch = log((controls.get_throttle(0) * 14.0) + 1.0);
-       //fprintf(stderr, "pitch1: %f ", pitch);
-       if (controls.get_throttle(0) > 0.0 || cur_fdm_state.v_rel_wind > 40.0) {
-           //fprintf(stderr, "rel_wind: %f ", cur_fdm_state.v_rel_wind);
-           // only add relative wind and AoA if prop is moving
-           // or we're really flying at idle throttle
-           if (pitch < 5.4) {  // this needs tuning
-               // prop tips not breaking sound barrier
-               pitch += log(cur_fdm_state.v_rel_wind + 0.8)/2;
+    if ( globals->get_options()->get_sound() && !audio_sched->not_working() ) {
+
+       if ( globals->get_options()->get_aircraft() == "c172" ) {
+           // pitch corresponds to rpm
+           // volume corresponds to manifold pressure
+
+           double rpm_factor;
+           if ( cur_fdm_state->get_engine(0) != NULL ) {
+               rpm_factor = cur_fdm_state->get_engine(0)->get_RPM() / 2500.0;
            } else {
-               // prop tips breaking sound barrier
-               pitch += log(cur_fdm_state.v_rel_wind + 0.8)/10;
+               rpm_factor = 1.0;
            }
-           //fprintf(stderr, "pitch2: %f ", pitch);
-           //fprintf(stderr, "AoA: %f ", FG_Gamma_vert_rad);
-
-           // Angle of Attack next... -x^3(e^x) is my best guess Just
-           // need to calculate some reasonable scaling factor and
-           // then clamp it on the positive aoa (neg adj) side
-           double aoa = cur_fdm_state.get_Gamma_vert_rad() * 2.2;
-           double tmp = 3.0;
-           double aoa_adj = pow(-aoa, tmp) * pow(M_E, aoa);
-           if (aoa_adj < -0.8) aoa_adj = -0.8;
-           pitch += aoa_adj;
-           //fprintf(stderr, "pitch3: %f ", pitch);
+           // cout << "rpm = " << cur_fdm_state->get_engine(0)->get_RPM()
+           //      << endl;
 
+           double pitch = 0.3 + rpm_factor * 3.0;
+       
            // don't run at absurdly slow rates -- not realistic
            // and sounds bad to boot.  :-)
-           if (pitch < 0.8) pitch = 0.8;
-       }
-       //fprintf(stderr, "pitch4: %f\n", pitch);
-
-       double volume = controls.get_throttle(0) * 1.15 + 0.3 +
-           log(cur_fdm_state.v_rel_wind + 1.0)/14.0;
-       // fprintf(stderr, "volume: %f\n", volume);
-
-       pitch_envelope.setStep  ( 0, 0.01, pitch );
-       volume_envelope.setStep ( 0, 0.01, volume );
+           if (pitch < 0.7) { pitch = 0.7; }
+           if (pitch > 5.0) { pitch = 5.0; }
+           // cout << "pitch = " << pitch << endl;
+
+           double mp_factor;
+           if ( cur_fdm_state->get_engine(0) != NULL ) {
+               mp_factor = 
+                   cur_fdm_state->get_engine(0)->get_Manifold_Pressure() / 28;
+           } else {
+               mp_factor = 1.0;
+           }
+           // cout << "mp = " 
+           //      << cur_fdm_state->get_engine(0)->get_Manifold_Pressure()
+           //      << endl;
 
-#   else
+           double volume = mp_factor;
 
-       double param = controls.get_throttle( 0 ) * 2.0 + 1.0;
-       pitch_envelope.setStep  ( 0, 0.01, param );
-       volume_envelope.setStep ( 0, 0.01, param );
+           if ( volume < 0.3 ) { volume = 0.3; }
+           if ( volume > 2.0 ) { volume = 2.0; }
+           // cout << "volume = " << volume << endl;
 
-#   endif // experimental throttle patch
+           pitch_envelope.setStep  ( 0, 0.01, pitch );
+           volume_envelope.setStep ( 0, 0.01, volume );
+       } else {
+           double param = controls.get_throttle( 0 ) * 2.0 + 1.0;
+           pitch_envelope.setStep  ( 0, 0.01, param );
+           volume_envelope.setStep ( 0, 0.01, param );
+       }
 
        audio_sched -> update();
     }
@@ -788,7 +1001,7 @@ static void fgIdleFunction ( void ) {
 
     if ( idle_state == 0 ) {
        // Initialize the splash screen right away
-       if ( current_options.get_splash_screen() ) {
+       if ( globals->get_options()->get_splash_screen() ) {
            fgSplashInit();
        }
        
@@ -796,9 +1009,9 @@ static void fgIdleFunction ( void ) {
     } else if ( idle_state == 1 ) {
        // Start the intro music
 #if !defined(WIN32)
-       if ( current_options.get_intro_music() ) {
+       if ( globals->get_options()->get_intro_music() ) {
            string lockfile = "/tmp/mpg123.running";
-           FGPath mp3file( current_options.get_fg_root() );
+           FGPath mp3file( globals->get_options()->get_fg_root() );
            mp3file.append( "Sounds/intro.mp3" );
 
            string command = "(touch " + lockfile + "; mpg123 "
@@ -825,7 +1038,7 @@ static void fgIdleFunction ( void ) {
     } else if ( idle_state == 3 ) {
        // This is the top level init routine which calls all the
        // other subsystem initialization routines.  If you are adding
-       // a subsystem to flight gear, its initialization call should
+       // a subsystem to flightgear, its initialization call should
        // located in this routine.
        if( !fgInitSubsystems()) {
            FG_LOG( FG_GENERAL, FG_ALERT,
@@ -853,7 +1066,7 @@ static void fgIdleFunction ( void ) {
 #ifdef ENABLE_AUDIO_SUPPORT
 
 #if !defined(WIN32)
-       if ( current_options.get_intro_music() ) {
+       if ( globals->get_options()->get_intro_music() ) {
            // Let's wait for mpg123 to finish
            string lockfile = "/tmp/mpg123.running";
            struct stat stat_buf;
@@ -869,44 +1082,50 @@ static void fgIdleFunction ( void ) {
        }
 #endif // WIN32
 
-       audio_sched = new slScheduler ( 8000 );
-       audio_mixer = new smMixer;
-       audio_mixer -> setMasterVolume ( 80 ) ;  /* 80% of max volume. */
-       audio_sched -> setSafetyMargin ( 1.0 ) ;
+       if ( globals->get_options()->get_sound() ) {
+           audio_sched = new slScheduler ( 8000 );
+           audio_mixer = new smMixer;
+           audio_mixer -> setMasterVolume ( 80 ) ;  /* 80% of max volume. */
+           audio_sched -> setSafetyMargin ( 1.0 ) ;
 
-       FGPath slfile( current_options.get_fg_root() );
-       slfile.append( "Sounds/wasp.wav" );
+           FGPath slfile( globals->get_options()->get_fg_root() );
+           slfile.append( "Sounds/wasp.wav" );
 
-       s1 = new slSample ( (char *)slfile.c_str() );
-       FG_LOG( FG_GENERAL, FG_INFO,
-               "Rate = " << s1 -> getRate()
-               << "  Bps = " << s1 -> getBps()
-               << "  Stereo = " << s1 -> getStereo() );
-       audio_sched -> loopSample ( s1 );
+           s1 = new slSample ( (char *)slfile.c_str() );
+           FG_LOG( FG_GENERAL, FG_INFO,
+                   "Rate = " << s1 -> getRate()
+                   << "  Bps = " << s1 -> getBps()
+                   << "  Stereo = " << s1 -> getStereo() );
+           audio_sched -> loopSample ( s1 );
 
-       if ( audio_sched->not_working() ) {
-           // skip
-       } else {
-           pitch_envelope.setStep  ( 0, 0.01, 0.6 );
-           volume_envelope.setStep ( 0, 0.01, 0.6 );
-
-           audio_sched -> addSampleEnvelope( s1, 0, 0, 
-                                             &pitch_envelope,
-                                             SL_PITCH_ENVELOPE );
-           audio_sched -> addSampleEnvelope( s1, 0, 1, 
-                                             &volume_envelope,
-                                             SL_VOLUME_ENVELOPE );
-       }
+           if ( audio_sched->not_working() ) {
+               // skip
+           } else {
+               pitch_envelope.setStep  ( 0, 0.01, 0.6 );
+               volume_envelope.setStep ( 0, 0.01, 0.6 );
+
+               audio_sched -> addSampleEnvelope( s1, 0, 0, 
+                                                 &pitch_envelope,
+                                                 SL_PITCH_ENVELOPE );
+               audio_sched -> addSampleEnvelope( s1, 0, 1, 
+                                                 &volume_envelope,
+                                                 SL_VOLUME_ENVELOPE );
+           }
 
-       // strcpy(slfile, path);
-       // strcat(slfile, "thunder.wav");
-       // s2 -> loadFile ( slfile );
-       // s2 -> adjustVolume(0.5);
-       // audio_sched -> playSample ( s2 );
+           // strcpy(slfile, path);
+           // strcat(slfile, "thunder.wav");
+           // s2 -> loadFile ( slfile );
+           // s2 -> adjustVolume(0.5);
+           // audio_sched -> playSample ( s2 );
+       }
 #endif
 
        // sleep(1);
        idle_state = 1000;
+
+       cout << "Panel visible = " << fgPanelVisible() << endl;
+       fgReshape( globals->get_options()->get_xsize(),
+                  globals->get_options()->get_ysize() );
     } 
 
     if ( idle_state == 1000 ) {
@@ -915,7 +1134,7 @@ static void fgIdleFunction ( void ) {
 
        fgMainLoop();
     } else {
-       if ( current_options.get_splash_screen() == 1 ) {
+       if ( globals->get_options()->get_splash_screen() == 1 ) {
            fgSplashUpdate(0.0);
        }
     }
@@ -924,35 +1143,41 @@ static void fgIdleFunction ( void ) {
 // options.cxx needs to see this for toggle_panel()
 // Handle new window size or exposure
 void fgReshape( int width, int height ) {
-    if ( ! current_options.get_panel_status() ) {
-       current_view.set_win_ratio( (GLfloat) width / (GLfloat) height );
-       xglViewport(0, 0 , (GLint)(width), (GLint)(height) );
+    if ( ! fgPanelVisible() || idle_state != 1000 ) {
+       globals->get_current_view()->set_win_ratio( (float)height /
+                                                   (float)width );
+       glViewport(0, 0 , (GLint)(width), (GLint)(height) );
     } else {
-       current_view.set_win_ratio( (GLfloat) width / 
-                                   ((GLfloat) (height)*0.4232) );
-       xglViewport(0, (GLint)((height)*0.5768), (GLint)(width), 
-                   (GLint)((height)*0.4232) );
+        int view_h =
+         int((current_panel->getViewHeight() - current_panel->getYOffset())
+             * (height / 768.0)) + 1;
+       globals->get_current_view()->set_win_ratio( (float)view_h /
+                                                   (float)width );
+       glViewport(0, (GLint)(height - view_h),
+                  (GLint)(width), (GLint)(view_h) );
     }
 
-    current_view.set_winWidth( width );
-    current_view.set_winHeight( height );
-    current_view.force_update_fov_math();
+    globals->get_options()->set_xsize( width );
+    globals->get_options()->set_ysize( height );
+    globals->get_current_view()->force_update_fov_math();
 
     // set these fov to be the same as in fgRenderFrame()
-    float x_fov = current_options.get_fov();
-    float y_fov = x_fov * 1.0 / current_view.get_win_ratio();
-    ssgSetFOV( x_fov, y_fov );
+    // float x_fov = globals->get_options()->get_fov();
+    // float y_fov = x_fov * 1.0 / current_view.get_win_ratio();
+    // ssgSetFOV( x_fov, y_fov );
+
+    // glViewport ( 0, 0, width, height );
+    float fov = globals->get_options()->get_fov();
+    // ssgSetFOV(fov * current_view.get_win_ratio(), fov);
+    ssgSetFOV(fov, fov * globals->get_current_view()->get_win_ratio());
 
-    glViewport ( 0, 0, width, height );
+    fgHUDReshape();
 
     if ( idle_state == 1000 ) {
        // yes we've finished all our initializations and are running
        // the main loop, so this will now work without seg faulting
        // the system.
-       current_view.UpdateViewParams(cur_fdm_state);
-       if ( current_options.get_panel_status() ) {
-           FGPanel::OurPanel->ReInit(0, 0, 1024, 768);
-       }
+       globals->get_current_view()->UpdateViewParams(cur_view_fdm);
     }
 }
 
@@ -960,33 +1185,35 @@ void fgReshape( int width, int height ) {
 // Initialize GLUT and define a main window
 int fgGlutInit( int *argc, char **argv ) {
 
-#if !defined( MACOS )
+#if !defined( macintosh )
     // GLUT will extract all glut specific options so later on we only
     // need wory about our own.
-    xglutInit(argc, argv);
+    glutInit(argc, argv);
 #endif
 
     // Define Display Parameters
-    xglutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
+    glutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
 
     FG_LOG( FG_GENERAL, FG_INFO, "Opening a window: " <<
-           current_options.get_xsize() << "x" << current_options.get_ysize() );
+           globals->get_options()->get_xsize() << "x"
+           << globals->get_options()->get_ysize() );
 
     // Define initial window size
-    xglutInitWindowSize( current_options.get_xsize(),
-                        current_options.get_ysize() );
+    glutInitWindowSize( globals->get_options()->get_xsize(),
+                        globals->get_options()->get_ysize() );
 
     // Initialize windows
-    if ( current_options.get_game_mode() == 0 ) {
+    if ( globals->get_options()->get_game_mode() == 0 ) {
        // Open the regular window
-       xglutCreateWindow("Flight Gear");
+       glutCreateWindow("FlightGear");
 #ifndef GLUT_WRONG_VERSION
     } else {
        // Open the cool new 'game mode' window
        char game_mode_str[256];
-       sprintf( game_mode_str, "width=%d height=%d bpp=32",
-                current_options.get_xsize(),
-                current_options.get_ysize() );
+       sprintf( game_mode_str, "width=%d height=%d bpp=%d",
+                globals->get_options()->get_xsize(),
+                globals->get_options()->get_ysize(),
+                globals->get_options()->get_bpp());
 
        FG_LOG( FG_GENERAL, FG_INFO, 
                "game mode params = " << game_mode_str );
@@ -1001,8 +1228,11 @@ int fgGlutInit( int *argc, char **argv ) {
     general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
     general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
     general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
-
+    int tmp;
+    glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
+    general.set_glMaxTexSize( tmp );
     FG_LOG ( FG_GENERAL, FG_INFO, general.get_glRenderer() );
+    FG_LOG ( FG_GENERAL, FG_INFO, "Max texture size = " << tmp );
 
 #if 0
     // try to determine if we should adjust the initial default
@@ -1017,16 +1247,16 @@ int fgGlutInit( int *argc, char **argv ) {
            // probably a voodoo-2
            if ( renderer.find( "TMU/SLI" ) != string::npos ) {
                // probably two SLI'd Voodoo-2's
-               current_options.set_xsize( 1024 );
-               current_options.set_ysize( 768 );
+               globals->get_options()->set_xsize( 1024 );
+               globals->get_options()->set_ysize( 768 );
                FG_LOG( FG_GENERAL, FG_INFO,
                        "It looks like you have two sli'd voodoo-2's." << endl
                        << "upgrading your win resolution to 1024 x 768" );
                glutReshapeWindow(1024, 768);
            } else {
                // probably a single non-SLI'd Voodoo-2
-               current_options.set_xsize( 800 );
-               current_options.set_ysize( 600 );
+               globals->get_options()->set_xsize( 800 );
+               globals->get_options()->set_ysize( 600 );
                FG_LOG( FG_GENERAL, FG_INFO,
                        "It looks like you have a voodoo-2." << endl
                        << "upgrading your win resolution to 800 x 600" );
@@ -1047,10 +1277,10 @@ int fgGlutInit( int *argc, char **argv ) {
 // Initialize GLUT event handlers
 int fgGlutInitEvents( void ) {
     // call fgReshape() on window resizes
-    xglutReshapeFunc( fgReshape );
+    glutReshapeFunc( fgReshape );
 
     // call GLUTkey() on keyboard event
-    xglutKeyboardFunc( GLUTkey );
+    glutKeyboardFunc( GLUTkey );
     glutSpecialFunc( GLUTspecialkey );
 
     // call guiMouseFunc() whenever our little rodent is used
@@ -1060,10 +1290,10 @@ int fgGlutInitEvents( void ) {
 
     // call fgMainLoop() whenever there is
     // nothing else to do
-    xglutIdleFunc( fgIdleFunction );
+    glutIdleFunc( fgIdleFunction );
 
     // draw the scene
-    xglutDisplayFunc( fgRenderFrame );
+    glutDisplayFunc( fgRenderFrame );
 
     return(1);
 }
@@ -1072,7 +1302,9 @@ int fgGlutInitEvents( void ) {
 // Main ...
 int main( int argc, char **argv ) {
 
-#if defined( MACOS )
+#if defined( macintosh )
+    freopen ("stdout.txt", "w", stdout );
+    freopen ("stderr.txt", "w", stderr );
     argc = ccommand( &argv );
 #endif
 
@@ -1083,11 +1315,49 @@ int main( int argc, char **argv ) {
     // set default log levels
     fglog().setLogLevels( FG_ALL, FG_INFO );
 
-    FG_LOG( FG_GENERAL, FG_INFO, "Flight Gear:  Version " << VERSION << endl );
+    FG_LOG( FG_GENERAL, FG_INFO, "FlightGear:  Version "
+           << FLIGHTGEAR_VERSION << endl );
 
     // seed the random number generater
     fg_srandom();
 
+    // Allocate global data structures.  This needs to happen before
+    // we parse command line options
+    globals = new FGGlobals;
+
+    SGRoute *route = new SGRoute;
+    globals->set_route( route );
+
+    FGOptions *options = new FGOptions;
+    globals->set_options( options );
+
+    FGViewer *pv = new FGViewer;
+    globals->set_pilot_view( pv );
+    FGViewer *cv = new FGViewer;
+    globals->set_current_view( cv );
+    
+    // Scan the config file(s) and command line options to see if
+    // fg_root was specified (ignore all other options for now)
+    fgInitFGRoot(argc, argv);
+
+    // cout << "1. airport_id = " << globals->get_options()->get_airport_id() << endl;
+
+    // Read global preferences from $FG_ROOT/preferences.xml
+    FGPath props_path(globals->get_options()->get_fg_root());
+    props_path.append("preferences.xml");
+    FG_LOG(FG_INPUT, FG_INFO, "Reading global preferences");
+    if (!readPropertyList(props_path.str(), &current_properties)) {
+      FG_LOG(FG_INPUT, FG_ALERT, "Failed to read global preferences from "
+            << props_path.str());
+    } else {
+      FG_LOG(FG_INPUT, FG_INFO, "Finished Reading global preferences");
+    }
+
+    // cout << "2. airport_id = " << globals->get_options()->get_airport_id() << endl;
+
+    // Initialize the Aircraft directory to "" (UIUC)
+    aircraft_dir = "";
+
     // Load the configuration parameters
     if ( !fgInitConfig(argc, argv) ) {
        FG_LOG( FG_GENERAL, FG_ALERT, "Config option parsing failed ..." );
@@ -1102,12 +1372,13 @@ int main( int argc, char **argv ) {
 
     // Initialize the various GLUT Event Handlers.
     if( !fgGlutInitEvents() ) {
-       FG_LOG( FG_GENERAL, FG_ALERT, 
-               "GLUT event handler initialization failed ..." );
-       exit(-1);
+       FG_LOG( FG_GENERAL, FG_ALERT, 
+               "GLUT event handler initialization failed ..." );
+       exit(-1);
     }
-
-    // Initialize ssg (from plib)
+    // Initialize ssg (from plib).  Needs to come before we do any
+    // other ssg stuff, but after opengl/glut has been initialized.
     ssgInit();
 
     // Initialize the user interface (we need to do this before
@@ -1115,6 +1386,69 @@ int main( int argc, char **argv ) {
     // fonts !!!
     guiInit();
 
+    // set current_options lon/lat if an airport id is specified
+    // cout << "3. airport_id = " << globals->get_options()->get_airport_id() << endl;
+    if ( globals->get_options()->get_airport_id().length() ) {
+       // fgSetPosFromAirportID( globals->get_options()->get_airport_id() );
+       fgSetPosFromAirportIDandHdg( globals->get_options()->get_airport_id(),
+                                    globals->get_options()->get_heading() );
+    }
+
+    // Initialize time
+    FGPath zone( globals->get_options()->get_fg_root() );
+    zone.append( "Timezone" );
+    SGTime *t = new SGTime( globals->get_options()->get_lon() * DEG_TO_RAD,
+                           globals->get_options()->get_lat() * DEG_TO_RAD,
+                           zone.str() );
+
+    // Handle potential user specified time offsets
+    time_t cur_time = t->get_cur_time();
+    time_t currGMT = sgTimeGetGMT( gmtime(&cur_time) );
+    time_t systemLocalTime = sgTimeGetGMT( localtime(&cur_time) );
+    time_t aircraftLocalTime = 
+       sgTimeGetGMT( fgLocaltime(&cur_time, t->get_zonename() ) );
+
+    // Okay, we now have six possible scenarios
+    switch ( globals->get_options()->get_time_offset_type() ) {
+    case FGOptions::FG_TIME_SYS_OFFSET:
+       globals->set_warp( globals->get_options()->get_time_offset() );
+       break;
+    case FGOptions::FG_TIME_GMT_OFFSET:
+       globals->set_warp( globals->get_options()->get_time_offset() - 
+                          (currGMT - systemLocalTime) );
+       break;
+    case FGOptions::FG_TIME_LAT_OFFSET:
+       globals->set_warp( globals->get_options()->get_time_offset() - 
+                          (aircraftLocalTime - systemLocalTime) );
+       break;
+    case FGOptions::FG_TIME_SYS_ABSOLUTE:
+       globals->set_warp( globals->get_options()->get_time_offset() -
+                          cur_time );
+       //printf("warp = %d\n", warp); 
+       break;
+    case FGOptions::FG_TIME_GMT_ABSOLUTE:
+       globals->set_warp( globals->get_options()->get_time_offset() -
+                          currGMT );
+       break;
+    case FGOptions::FG_TIME_LAT_ABSOLUTE:
+       globals->set_warp( globals->get_options()->get_time_offset() - 
+                          (aircraftLocalTime - systemLocalTime) - 
+                          cur_time ); 
+       break;
+    default:
+       FG_LOG( FG_GENERAL, FG_ALERT, "Unsupported type" );
+       exit( -1 );
+    }
+
+    FG_LOG( FG_GENERAL, FG_INFO, "After time init, warp = " 
+           << globals->get_warp() );
+
+    globals->set_warp_delta( 0 );
+
+    t->update( 0.0, 0.0, globals->get_warp() );
+
+    globals->set_time_params( t );
+
     // Do some quick general initializations
     if( !fgInitGeneral()) {
        FG_LOG( FG_GENERAL, FG_ALERT, 
@@ -1127,37 +1461,103 @@ int main( int argc, char **argv ) {
     // distribution) specifically from the ssg tux example
     //
 
-    FGPath modelpath( current_options.get_fg_root() );
-    modelpath.append( "Models" );
-    modelpath.append( "Geometry" );
+    FGPath modelpath( globals->get_options()->get_fg_root() );
+    // modelpath.append( "Models" );
+    // modelpath.append( "Geometry" );
   
-    FGPath texturepath( current_options.get_fg_root() );
+    FGPath texturepath( globals->get_options()->get_fg_root() );
     texturepath.append( "Models" );
     texturepath.append( "Textures" );
   
     ssgModelPath( (char *)modelpath.c_str() );
     ssgTexturePath( (char *)texturepath.c_str() );
 
+    // Scene graph root
     scene = new ssgRoot;
+    scene->setName( "Scene" );
+
+    // Initialize the sky
+    FGPath ephem_data_path( globals->get_options()->get_fg_root() );
+    ephem_data_path.append( "Astro" );
+    SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
+    ephem->update( globals->get_time_params()->getMjd(),
+                  globals->get_time_params()->getLst(),
+                  0.0 );
+    globals->set_ephem( ephem );
+
+    FGPath sky_tex_path( globals->get_options()->get_fg_root() );
+    sky_tex_path.append( "Textures" );
+    sky_tex_path.append( "Sky" );
+    thesky = new SGSky;
+    thesky->texture_path( sky_tex_path.str() );
+
+    thesky->build( 550.0, 550.0,
+                  globals->get_ephem()->getNumPlanets(), 
+                  globals->get_ephem()->getPlanets(), 60000.0,
+                  globals->get_ephem()->getNumStars(),
+                  globals->get_ephem()->getStars(), 60000.0 );
+
+    if ( globals->get_options()->get_clouds() == true ) {
+       thesky->add_cloud_layer( 2600.0, 200.0, 50.0, 40000.0,
+                                SG_CLOUD_MOSTLY_SUNNY );
+       thesky->add_cloud_layer( 6000.0, 20.0, 10.0, 40000.0,
+                                SG_CLOUD_CIRRUS );
+       // thesky->add_cloud_layer( 1000.0, 200.0, 50.0,
+       //                          SG_CLOUD_MOSTLY_SUNNY );
+       // thesky->add_cloud_layer( 1800.0, 400.0, 100.0, SG_CLOUD_OVERCAST );
+       // thesky->add_cloud_layer( 5000.0, 20.0, 10.0, SG_CLOUD_CIRRUS );
+    }
+
+    // Initialize MagVar model
+    SGMagVar *magvar = new SGMagVar();
+    globals->set_mag( magvar );
+
+    // Terrain branch
     terrain = new ssgBranch;
     terrain->setName( "Terrain" );
+    scene->addKid( terrain );
+
+    // temporary visible aircraft "own ship"
     penguin_sel = new ssgSelector;
     penguin_pos = new ssgTransform;
-
-    ssgEntity *tux_obj = ssgLoadAC( "glider.ac" );
-    // ssgEntity *tux_obj = ssgLoadAC( "Tower1x.ac" );
-    penguin_pos->addKid( tux_obj );
+    string tux_path =
+      current_properties.getStringValue("/sim/model/path",
+                                       "Models/Geometry/glider.ac");
+    ssgEntity *tux_obj = ssgLoad((char *)(tux_path.c_str()));
+
+    // align the model properly for FGFS
+    ssgTransform *tux_align = new ssgTransform;
+    tux_align->addKid(tux_obj);
+    sgMat4 tux_matrix;
+    float h_rot =
+      current_properties.getFloatValue("/sim/model/h-rotation", 0.0);
+    float p_rot =
+      current_properties.getFloatValue("/sim/model/p-rotation", 0.0);
+    float r_rot =
+      current_properties.getFloatValue("/sim/model/r-rotation", 0.0);
+    sgMakeRotMat4(tux_matrix, h_rot, h_rot, r_rot);
+    tux_align->setTransform(tux_matrix);
+
+    penguin_pos->addKid( tux_align );
     penguin_sel->addKid( penguin_pos );
     ssgFlatten( tux_obj );
     ssgStripify( penguin_sel );
+    penguin_sel->clrTraversalMaskBits( SSGTRAV_HOT );
+    scene->addKid( penguin_sel );
+
+    // $$$ begin - added VS Renganthan 17 Oct 2K
+    fgLoadDCS();
+    // $$$ end - added VS Renganthan 17 Oct 2K
 
 #ifdef FG_NETWORK_OLK
     // Do the network intialization
-    printf("Multipilot mode %s\n", fg_net_init() );
+    if ( globals->get_options()->get_network_olk() ) {
+       printf("Multipilot mode %s\n", fg_net_init( scene ) );
+    }
 #endif
 
-    scene->addKid( terrain );
-    scene->addKid( penguin_sel );
+    // build our custom render states
+    fgBuildRenderStates();
 
     // pass control off to the master GLUT event handler
     glutMainLoop();
@@ -1166,3 +1566,118 @@ int main( int argc, char **argv ) {
     // etc.
     return 0;
 }
+
+
+// $$$ end - added VS Renganathan, 15 Oct 2K
+void fgLoadDCS(void) {
+
+    double obj_lat,obj_lon,obj_alt;
+    int i = 1;
+    string obj_filename;
+
+    FGPath tile_path( globals->get_options()->get_fg_root());
+    tile_path.append( "Scenery" );
+    tile_path.append( "Objects.txt" );
+    fg_gzifstream in( tile_path.str() );
+    if ( ! in.is_open() ) {
+       FG_LOG( FG_TERRAIN, FG_ALERT, "Cannot open file: " << tile_path.str() );
+    }
+
+    FGPath modelpath( globals->get_options()->get_fg_root() );
+    modelpath.append( "Models" );
+    modelpath.append( "Geometry" );
+  
+    FGPath texturepath( globals->get_options()->get_fg_root() );
+    texturepath.append( "Models" );
+    texturepath.append( "Textures" );
+    ssgModelPath( (char *)modelpath.c_str() );
+    ssgTexturePath( (char *)texturepath.c_str() );
+
+    // while ( ! in.eof() ) {
+    //     in >> obj_filename >> obj_lat >> obj_lon >> obj_alt;
+    //     totalDCSobj = totalDCSobj+1;
+
+    ship_sel = new ssgSelector;
+    ship_pos = new ssgTransform;
+    ssgEntity *ship_obj = ssgLoadOBJ( "saratoga.obj" );
+    if ( ship_obj != NULL ) {
+       ship_pos->addKid( ship_obj ); // add object to transform node
+       ship_sel->addKid( ship_pos ); // add transform node to selector
+       // ssgFlatten( ship_obj );
+       // ssgStripify( ship_sel );
+       ship_sel->clrTraversalMaskBits( SSGTRAV_HOT );
+       scene->addKid( ship_sel ); //add selector node to root node
+    } else {
+       FG_LOG( FG_TERRAIN, FG_ALERT, "Cannot open file: " << "saratoga.obj" );
+    }
+
+    //     if (in.eof()) break;
+
+    // } // while
+    return;
+}
+
+
+void fgUpdateDCS (void) {
+
+    double eye_lat,eye_lon,eye_alt;
+    static double obj_lat=15.377603*DEG_TO_RAD;
+    static double obj_lon= 73.816436*DEG_TO_RAD;
+    static double obj_alt=0.15;
+    static double obj_head;
+    double sl_radius,obj_latgc;
+    float nresultmat[4][4];
+    sgMat4 Trans,rothead,rotlon,rot180,rotlat,resultmat1,resultmat2,resultmat3;
+    double bz[3];
+
+    obj_lat = obj_lat + 0.0000001;
+
+    // Instantaneous Geodetic Lat/Lon/Alt of moving object
+    //    obj_lon = current_aircraft.fdm_state->get_aux5()*DEG_TO_RAD;
+    //    obj_lat = current_aircraft.fdm_state->get_aux6()*DEG_TO_RAD;
+    //    obj_alt = current_aircraft.fdm_state->get_aux7();
+         
+    // Geodetic to Geocentric angles for rotation
+    sgGeodToGeoc(obj_lat,obj_alt,&sl_radius,&obj_latgc);
+
+    // moving object gbs-posn in cartesian coords
+    Point3D obj_posn = Point3D( obj_lon,obj_lat,obj_alt);
+    Point3D obj_pos = sgGeodToCart( obj_posn );
+
+    // Translate moving object w.r.t eye
+    Point3D Objtrans = obj_pos-scenery.center;
+    bz[0]=Objtrans.x();
+    bz[1]=Objtrans.y();
+    bz[2]=Objtrans.z();
+
+    // rotate dynamic objects for lat,lon & alt and other motion about its axes
+    if ( ship_sel != NULL ) {
+       ship_sel->select(1);
+       
+       sgMat4 sgTRANS;
+       sgMakeTransMat4( sgTRANS, bz[0],bz[1],bz[2]);
+
+       sgVec3 ship_fwd,ship_rt,ship_up;
+       sgSetVec3( ship_fwd, 1.0, 0.0, 0.0);//east,roll
+       sgSetVec3( ship_rt, 0.0, 1.0, 0.0);//up,pitch
+       sgSetVec3( ship_up, 0.0, 0.0, 1.0); //north,yaw
+
+       sgMat4 sgROT_lon, sgROT_lat, sgROT_hdg;
+       sgMakeRotMat4( sgROT_lon, obj_lon*RAD_TO_DEG, ship_up );
+       sgMakeRotMat4( sgROT_lat, 90-obj_latgc*RAD_TO_DEG, ship_rt );
+       sgMakeRotMat4( sgROT_hdg, 180.0, ship_up );
+       
+       sgMat4 sgTUX;
+       sgCopyMat4( sgTUX, sgROT_hdg );
+       sgPostMultMat4( sgTUX, sgROT_lat );
+       sgPostMultMat4( sgTUX, sgROT_lon );
+       sgPostMultMat4( sgTUX, sgTRANS );
+
+       sgCoord shippos;
+       sgSetCoord( &shippos, sgTUX );
+       ship_pos->setTransform( &shippos );
+    }
+}
+
+// $$$ end - added VS Renganathan, 15 Oct 2K