X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FMain%2Fmain.cxx;h=d9ec19b7215ff434c6bb656c882784db60f65bee;hb=7cc98ad15f7295cc3665abe6a0d419bf84ada3ac;hp=cc13c554e8e4111a0db886e72fc5300aa787969b;hpb=7a5fbf1ba357509ce3afb6be1ba62ff62772fa4a;p=flightgear.git

diff --git a/src/Main/main.cxx b/src/Main/main.cxx
index cc13c554e..d9ec19b72 100644
--- a/src/Main/main.cxx
+++ b/src/Main/main.cxx
@@ -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>
@@ -55,57 +53,73 @@
 #  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 ) ;
@@ -141,9 +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 =
 {
@@ -153,7 +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
@@ -174,71 +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 {
@@ -255,21 +319,30 @@ static void fgRenderFrame( void ) {
 
 	// update view volume parameters
 	// cout << "before pilot_view update" << endl;
-	pilot_view.UpdateViewParams(*cur_fdm_state);
+        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;
-	current_view.UpdateViewParams(cur_view_fdm);
+	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]);
@@ -280,96 +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;
@@ -378,18 +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 );
 	}
 
-	if ( current_options.get_view_mode() == 
-	     fgOPTIONS::FG_VIEW_FIRST_PERSON )
+	if ( globals->get_options()->get_view_mode() == 
+	     FGOptions::FG_VIEW_PILOT )
         {
 	    // 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();
@@ -400,9 +537,9 @@ static void fgRenderFrame( void ) {
 
 	    sgMat4 sgTRANS;
 	    sgMakeTransMat4( sgTRANS, 
-			     pilot_view.view_pos.x(),
-			     pilot_view.view_pos.y(),
-			     pilot_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);
@@ -410,59 +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, pilot_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
@@ -470,20 +646,27 @@ void fgUpdateTimeDepCalcs(int multi_loop, int remainder) {
 	multi_loop = 1;
     }
 
-    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(),
+		     multi_loop * globals->get_options()->get_speed_up(),
 		     remainder ); */
-	cur_fdm_state->update( multi_loop * current_options.get_speed_up() );
+	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(), 
+	// 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( *cur_fdm_state );
@@ -491,51 +674,56 @@ void fgUpdateTimeDepCalcs(int multi_loop, int remainder) {
 	fdm_list.pop_front();
     }
 
-    if ( current_options.get_view_mode() == fgOPTIONS::FG_VIEW_FIRST_PERSON ) {
+    if ( globals->get_options()->get_view_mode() == FGOptions::FG_VIEW_PILOT ) {
 	cur_view_fdm = *cur_fdm_state;
 	// do nothing
-    } else if ( current_options.get_view_mode() == fgOPTIONS::FG_VIEW_FOLLOW ) {
+    } 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
 
@@ -609,19 +817,20 @@ static void fgMainLoop( void ) {
 	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", 
+	    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",
@@ -630,7 +839,23 @@ static void fgMainLoop( void ) {
 	   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);
 	}
     }
@@ -924,38 +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 = current_options.get_fov();
-    ssgSetFOV(fov * current_view.get_win_ratio(), 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());
+
+    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.
-	solarSystemRebuild();
-	current_view.UpdateViewParams(cur_view_fdm);
-	if ( current_options.get_panel_status() ) {
-	    FGPanel::OurPanel->ReInit(0, 0, 1024, 768);
-	}
+	globals->get_current_view()->UpdateViewParams(cur_view_fdm);
     }
 }
 
@@ -963,33 +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 );
@@ -1004,8 +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
@@ -1020,16 +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" );
@@ -1050,10 +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
@@ -1063,10 +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);
 }
@@ -1075,7 +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
 
@@ -1086,11 +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 ..." );
@@ -1105,12 +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
@@ -1118,6 +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, 
@@ -1130,37 +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();
@@ -1169,3 +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