X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FMain%2Fmain.cxx;h=658ee8f74f0536dd10ae63fbc940f2063c86bf5a;hb=cf6022e43937bc19dc97885fb8248e67e69b6ad8;hp=122c4c51771526d1a692a0d98ddb35bfe240b4cd;hpb=6a6e829dd11474114c24c174ded4a74ddf7e8157;p=flightgear.git

diff --git a/src/Main/main.cxx b/src/Main/main.cxx
index 122c4c517..658ee8f74 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
@@ -66,15 +63,16 @@
 
 #include <simgear/constants.h>  // for VERSION
 #include <simgear/debug/logstream.hxx>
-#include <simgear/math/fg_geodesy.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 <Aircraft/aircraft.hxx>
-#include <Ephemeris/ephemeris.hxx>
 
 #include <Autopilot/newauto.hxx>
 #include <Cockpit/cockpit.hxx>
@@ -87,14 +85,23 @@
 #ifdef FG_NETWORK_OLK
 #include <NetworkOLK/network.h>
 #endif
-#include <Objects/materialmgr.hxx>
 #include <Scenery/scenery.hxx>
 #include <Scenery/tilemgr.hxx>
-#include <Sky/sky.hxx>
 #include <Time/event.hxx>
-#include <Time/fg_time.hxx>
 #include <Time/fg_timer.hxx>
+#include <Time/light.hxx>
 #include <Time/sunpos.hxx>
+#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>
@@ -102,17 +109,17 @@
 #  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"
-
 
 // -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
@@ -129,9 +136,15 @@ FGGeneral general;
 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 ) ;
@@ -159,7 +172,6 @@ ssgTransform *fgd_pos = NULL;
 FGInterface cur_view_fdm;
 
 // Sky structures
-FGEphemeris *ephem;
 SGSky *thesky;
 
 // hack
@@ -171,7 +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
@@ -198,6 +210,7 @@ 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 );
@@ -209,12 +222,14 @@ void fgBuildRenderStates( void ) {
     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 );
@@ -229,7 +244,7 @@ void fgInitVisuals( void ) {
 
 #ifndef GLUT_WRONG_VERSION
     // Go full screen if requested ...
-    if ( current_options.get_fullscreen() ) {
+    if ( globals->get_options()->get_fullscreen() ) {
 	glutFullScreen();
     }
 #endif
@@ -248,14 +263,14 @@ void fgInitVisuals( void ) {
 
     // glFogi (GL_FOG_MODE, GL_LINEAR);
     glFogi (GL_FOG_MODE, GL_EXP2);
-    if ( (current_options.get_fog() == 1) || 
-	 (current_options.get_shading() == 0) ) {
+    if ( (globals->get_options()->get_fog() == 1) || 
+	 (globals->get_options()->get_shading() == 0) ) {
 	// if fastest fog requested, or if flat shading force fastest
 	glHint ( GL_FOG_HINT, GL_FASTEST );
-    } else if ( current_options.get_fog() == 2 ) {
+    } 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
 	glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
     }
@@ -276,16 +291,9 @@ void fgRenderFrame( void ) {
     FGBFI::update();
 
     fgLIGHT *l = &cur_light_params;
-    FGTime *t = FGTime::cur_time_params;
-    // FGView *v = &current_view;
     static double last_visibility = -9999;
-    static bool in_puff = false;
-    static double puff_length = 0;
-    static double puff_progression = 0;
-    const double ramp_up = 0.15;
-    const double ramp_down = 0.15;
 
-    double angle;
+    // 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 };
@@ -294,7 +302,7 @@ void fgRenderFrame( void ) {
     
     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 {
@@ -309,23 +317,96 @@ void fgRenderFrame( void ) {
 	// timerText -> setLabel (ctime (&t->cur_time));
 	// end of hack
 
+	// calculate our current position in cartesian space
+	scenery.center = scenery.next_center;
+	// printf("scenery center = %.2f %.2f %.2f\n", scenery.center.x(),
+	//        scenery.center.y(), scenery.center.z());
+
+	FGViewerRPH *pilot_view =
+	    (FGViewerRPH *)globals->get_viewmgr()->get_view( 0 );
+
+	pilot_view->set_geod_view_pos( cur_fdm_state->get_Longitude(), 
+				       cur_fdm_state->get_Lat_geocentric(), 
+				       cur_fdm_state->get_Altitude() *
+				       FEET_TO_METER );
+	pilot_view->set_sea_level_radius( cur_fdm_state->
+					  get_Sea_level_radius() *
+					  FEET_TO_METER ); 
+	pilot_view->set_rph( cur_fdm_state->get_Phi(),
+			     cur_fdm_state->get_Theta(),
+			     cur_fdm_state->get_Psi() );
+
+#if 0
+	// this is a test, we are trying to match RPH and LookAt
+	// matrices
+	tv->set_geod_view_pos( cur_fdm_state->get_Longitude(), 
+			       cur_fdm_state->get_Lat_geocentric(), 
+			       cur_fdm_state->get_Altitude() *
+			       FEET_TO_METER );
+	tv->set_sea_level_radius( cur_fdm_state->get_Sea_level_radius() *
+				  FEET_TO_METER );
+	tv->set_view_forward( globals->get_current_view()->get_view_forward() );
+	tv->set_view_up( globals->get_current_view()->get_view_up() );
+
+	sgMat4 rph;
+	sgCopyMat4( rph, globals->get_current_view()->get_VIEW_ROT() );
+	cout << "RPH Matrix = " << endl;
+	int i, j;
+	for ( i = 0; i < 4; i++ ) {
+	    for ( j = 0; j < 4; j++ ) {
+		printf("%10.4f ", rph[i][j]);
+	    }
+	    cout << endl;
+	}
+	sgMat4 la;
+	sgCopyMat4( la, tv->get_VIEW_ROT() );
+	cout << "LookAt Matrix = " << endl;
+	for ( i = 0; i < 4; i++ ) {
+	    for ( j = 0; j < 4; j++ ) {
+		printf("%10.4f ", la[i][j]);
+	    }
+	    cout << endl;
+	}
+#endif
+
 	// update view volume parameters
 	// cout << "before pilot_view update" << endl;
-	pilot_view.UpdateViewParams(*cur_fdm_state);
-	// cout << "after pilot_view update" << endl;
-	current_view.UpdateViewParams(cur_view_fdm);
+        if ( globals->get_options()->get_view_mode() ==
+	     FGOptions::FG_VIEW_FOLLOW )
+	{
+	    float * offset = globals->get_current_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);
+	}
+
+	if ( ! fgPanelVisible() ) {
+	    xglViewport( 0, 0 ,
+			 (GLint)(globals->get_options()->get_xsize()),
+			 (GLint)(globals->get_options()->get_ysize()) );
+	} else {
+	    int view_h =
+		int( (current_panel->getViewHeight() -
+		      current_panel->getYOffset())
+		     * (globals->get_options()->get_ysize() / 768.0) );
+	    glViewport( 0, 
+			(GLint)(globals->get_options()->get_ysize() - view_h),
+			(GLint)(globals->get_options()->get_xsize()),
+			(GLint)(view_h) );
+	}
 
 	// set the sun position
 	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]);
@@ -346,33 +427,47 @@ void fgRenderFrame( void ) {
 	// ssg does to set up the model view matrix
 	glMatrixMode(GL_MODELVIEW);
 	glLoadIdentity();
-	ssgSetCamera( current_view.VIEW );
-
-	/*
-	sgMat4 vm_tmp, view_mat;
-	sgTransposeNegateMat4 ( vm_tmp, current_view.VIEW ) ;
-	sgCopyMat4( view_mat, copy_of_ssgOpenGLAxisSwapMatrix ) ;
-	sgPreMultMat4( view_mat, vm_tmp ) ;
-	glLoadMatrixf( (float *)view_mat );
-	*/
+	ssgSetCamera( (sgMat4)globals->get_current_view()->get_VIEW() );
 
 	// set the opengl state to known default values
 	default_state->force();
 
-	// draw sky dome
-	if ( current_options.get_skyblend() ) {
-	    sgVec3 view_pos;
-	    sgSetVec3( view_pos,
-		       current_view.get_view_pos().x(),
-		       current_view.get_view_pos().y(),
-		       current_view.get_view_pos().z() );
+	// 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() );
 
-	    sgVec3 zero_elev;
-	    sgSetVec3( zero_elev,
-		       current_view.get_cur_zero_elev().x(),
-		       current_view.get_cur_zero_elev().y(),
-		       current_view.get_cur_zero_elev().z() );
+	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);
+	}
+ 
+	// update the sky dome
+	if ( globals->get_options()->get_skyblend() ) {
 	    /* cout << "thesky->repaint() sky_color = "
 		 << cur_light_params.sky_color[0] << " "
 		 << cur_light_params.sky_color[1] << " "
@@ -390,8 +485,10 @@ void fgRenderFrame( void ) {
 			     cur_light_params.adj_fog_color,
 			     cur_light_params.sun_angle,
 			     cur_light_params.moon_angle,
-			     ephem->getNumPlanets(), ephem->getPlanets(),
-			     ephem->getNumStars(), ephem->getStars() );
+			     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;
@@ -400,125 +497,39 @@ void fgRenderFrame( void ) {
 		 << " lon = " << cur_fdm_state->get_Longitude()
 		 << " lat = " << cur_fdm_state->get_Latitude() << endl;
 	    cout << "    sun_rot = " << cur_light_params.sun_rotation
-		 << " gst = " << FGTime::cur_time_params->getGst() << endl;
-	    cout << "    sun ra = " << ephem->getSunRightAscension()
-		 << " sun dec = " << ephem->getSunDeclination() 
-		 << " moon ra = " << ephem->getMoonRightAscension()
-		 << " moon dec = " << ephem->getMoonDeclination() << endl; */
-
-	    thesky->reposition( view_pos, zero_elev,
-				current_view.get_local_up(),
+		 << " 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( globals->get_current_view()->get_view_pos(),
+				globals->get_current_view()->get_zero_elev(),
+				globals->get_current_view()->get_world_up(),
 				cur_fdm_state->get_Longitude(),
 				cur_fdm_state->get_Latitude(),
+				cur_fdm_state->get_Altitude() * FEET_TO_METER,
 				cur_light_params.sun_rotation,
-				FGTime::cur_time_params->getGst(),
-				ephem->getSunRightAscension(),
-				ephem->getSunDeclination(), 50000.0,
-				ephem->getMoonRightAscension(),
-				ephem->getMoonDeclination(), 50000.0 );
+				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 );
 	}
 
 	glEnable( GL_DEPTH_TEST );
-	if ( current_options.get_fog() > 0 ) {
+	if ( globals->get_options()->get_fog() > 0 ) {
 	    glEnable( GL_FOG );
 	    glFogi( GL_FOG_MODE, GL_EXP2 );
 	    glFogfv( GL_FOG_COLOR, l->adj_fog_color );
 	}
 
-	// update fog params if visibility has changed
-#ifndef FG_OLD_WEATHER
-	double cur_visibility = WeatherDatabase->getWeatherVisibility();
-#else
-	double cur_visibility = current_weather.get_visibility();
-#endif
-	double actual_visibility = cur_visibility;
-
-	if ( current_options.get_clouds() ) {
-	    double diff = fabs( cur_fdm_state->get_Altitude() * FEET_TO_METER -
-				current_options.get_clouds_asl() );
-	    // cout << "altitude diff = " << diff << endl;
-	    if ( diff < 75 ) {
-		if ( ! in_puff ) {
-		    // calc chance of entering cloud puff
-		    double rnd = fg_random();
-		    double chance = rnd * rnd * rnd;
-		    if ( chance > 0.95 /* * (diff - 25) / 50.0 */ ) {
-			in_puff = true;
-			do {
-			    puff_length = fg_random() * 2.0; // up to 2 seconds
-			} while ( puff_length <= 0.0 );
-			puff_progression = 0.0;
-		    }
-		}
-
-		actual_visibility = cur_visibility * (diff - 25) / 50.0;
-
-		if ( in_puff ) {
-		    // modify actual_visibility based on puff envelope
-
-		    if ( puff_progression <= ramp_up ) {
-			double x = FG_PI_2 * puff_progression / ramp_up;
-			double factor = 1.0 - sin( x );
-			actual_visibility = actual_visibility * factor;
-		    } else if ( puff_progression >= ramp_up + puff_length ) {
-			double x = FG_PI_2 * 
-			    (puff_progression - (ramp_up + puff_length)) /
-			    ramp_down;
-			double factor = sin( x );
-			actual_visibility = actual_visibility * factor;
-		    } else {
-			actual_visibility = 0.0;
-		    }
-
-		    /* cout << "len = " << puff_length
-			 << "  x = " << x 
-			 << "  factor = " << factor
-			 << "  actual_visibility = " << actual_visibility 
-			 << endl; */
-
-		    puff_progression += ( global_multi_loop * 
-					  current_options.get_speed_up() ) /
-			(double)current_options.get_model_hz();
-
-		    /* cout << "gml = " << global_multi_loop 
-			 << "  speed up = " << current_options.get_speed_up()
-			 << "  hz = " << current_options.get_model_hz() << endl;
-			 */ 
-
-		    if ( puff_progression > puff_length + ramp_up + ramp_down) {
-			in_puff = false; 
-		    }
-		}
-
-		// never let visibility drop below zero
-		if ( actual_visibility < 0 ) {
-		    actual_visibility = 0;
-		}
-	    }
-	}
-
-	// 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);
-	}
- 
 	// set lighting parameters
-	glLightfv( GL_LIGHT0, GL_AMBIENT, l->scene_ambient );
+	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 );
 
@@ -538,8 +549,8 @@ void fgRenderFrame( void ) {
 
 	// glMatrixMode( GL_PROJECTION );
 	// glLoadIdentity();
- 	float fov = current_options.get_fov();
- 	ssgSetFOV(fov * current_view.get_win_ratio(), fov);
+ 	float fov = globals->get_options()->get_fov();
+ 	ssgSetFOV(fov, fov * globals->get_options()->get_win_ratio());
 
 	double agl = current_aircraft.fdm_state->get_Altitude() * FEET_TO_METER
 	    - scenery.cur_elev;
@@ -553,26 +564,20 @@ void fgRenderFrame( void ) {
 	    ssgSetNearFar( 0.5f, 120000.0f );
 	}
 
-	if ( current_options.get_view_mode() == 
-	     fgOPTIONS::FG_VIEW_PILOT )
+	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();
-	    // sgCopyMat4( sgVIEW, tmp.m );
-
 	    // enable TuX and set up his position and orientation
 	    penguin_sel->select(1);
 
 	    sgMat4 sgTRANS;
 	    sgMakeTransMat4( sgTRANS, 
-			     pilot_view.view_pos.x(),
-			     pilot_view.view_pos.y(),
-			     pilot_view.view_pos.z() );
+			     globals->get_current_view()->get_view_pos() );
 
 	    sgVec3 ownship_up;
 	    sgSetVec3( ownship_up, 0.0, 0.0, 1.0);
@@ -588,7 +593,7 @@ void fgRenderFrame( void ) {
 	    // sgTUX = ( sgROT * pilot_view.VIEW_ROT ) * sgTRANS
 	    sgMat4 sgTUX;
 	    sgCopyMat4( sgTUX, sgROT );
-	    sgPostMultMat4( sgTUX, pilot_view.VIEW_ROT );
+	    sgPostMultMat4( sgTUX, globals->get_current_view()->get_VIEW_ROT() );
 	    sgPostMultMat4( sgTUX, sgTRANS );
 	
 	    sgCoord tuxpos;
@@ -596,8 +601,12 @@ void fgRenderFrame( void ) {
 	    penguin_pos->setTransform( &tuxpos );
 	}
 
+	// $$$ begin - added VS Renganthan 17 Oct 2K
+	fgUpdateDCS();
+	// $$$ end - added VS Renganthan 17 Oct 2K
+
 # ifdef FG_NETWORK_OLK
-	if ( current_options.get_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 */
@@ -617,29 +626,18 @@ void fgRenderFrame( void ) {
 	}
 # 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 (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->draw_background();
+	thesky->preDraw();
 
 	// draw the ssg scene
+	glEnable( GL_DEPTH_TEST );
 	ssgCullAndDraw( scene );
 
 	// draw the sky cloud layers
-	thesky->draw_scene();
+	thesky->postDraw( cur_fdm_state->get_Altitude() * FEET_TO_METER );
 
 	// display HUD && Panel
 	glDisable( GL_FOG );
@@ -666,10 +664,7 @@ void fgRenderFrame( void ) {
 // 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
@@ -677,22 +672,27 @@ void fgUpdateTimeDepCalcs(int multi_loop, int remainder) {
 	multi_loop = 1;
     }
 
-    if ( !t->getPause() ) {
+    if ( !globals->get_freeze() && !initial_freeze ) {
 	// run Autopilot system
 	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() );
-	FGSteam::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 );
@@ -700,51 +700,56 @@ void fgUpdateTimeDepCalcs(int multi_loop, int remainder) {
 	fdm_list.pop_front();
     }
 
-    if ( current_options.get_view_mode() == fgOPTIONS::FG_VIEW_PILOT ) {
+    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;
     }
@@ -757,7 +762,9 @@ void fgUpdateTimeDepCalcs(int multi_loop, int remainder) {
     l->UpdateAdjFog();
 
     // Update solar system
-    ephem->update( t, cur_fdm_state->get_Latitude() );
+    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(),
@@ -770,7 +777,7 @@ 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
 }
@@ -783,7 +790,6 @@ 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;
 #ifdef FANCY_FRAME_COUNTER
@@ -794,13 +800,13 @@ 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 ( current_options.get_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
@@ -811,7 +817,8 @@ static void fgMainLoop( void ) {
 
 #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 )
@@ -840,15 +847,16 @@ static void fgMainLoop( void ) {
 		   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",
@@ -857,9 +865,23 @@ static void fgMainLoop( void ) {
 	   cur_fdm_state->get_Altitude() * FEET_TO_METER); */
 
     // update "time"
+    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(),
-	       cur_fdm_state->get_Altitude()* FEET_TO_METER );
+	       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();
@@ -903,9 +925,9 @@ static void fgMainLoop( void ) {
 	elapsed += remainder;
 
 	global_multi_loop = (int)(((double)elapsed * 0.000001) * 
-			   current_options.get_model_hz());
+			   globals->get_options()->get_model_hz());
 	remainder = elapsed - ( (global_multi_loop*1000000) / 
-				current_options.get_model_hz() );
+				globals->get_options()->get_model_hz() );
 	FG_LOG( FG_ALL, FG_DEBUG, 
 		"Model iterations needed = " << global_multi_loop
 		<< ", new remainder = " << remainder );
@@ -919,81 +941,67 @@ static void fgMainLoop( void ) {
 	}
     }
 
-#if ! defined( MACOS )
+#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;
-	} else {
-	    // prop tips breaking sound barrier
-	    pitch += log(cur_fdm_state->v_rel_wind + 0.8)/10;
-	}
-	//fprintf(stderr, "pitch2: %f ", pitch);
-	//fprintf(stderr, "AoA: %f ", FG_Gamma_vert_rad);
+    if ( globals->get_options()->get_sound() && !audio_sched->not_working() ) {
 
-	// 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);
+	if ( globals->get_options()->get_aircraft() == "c172" ) {
+	    // pitch corresponds to rpm
+	    // volume corresponds to manifold pressure
 
-	// 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);
+	    double rpm_factor;
+	    if ( cur_fdm_state->get_engine(0) != NULL ) {
+		rpm_factor = cur_fdm_state->get_engine(0)->get_RPM() / 2500.0;
+	    } else {
+		rpm_factor = 1.0;
+	    }
+	    // cout << "rpm = " << cur_fdm_state->get_engine(0)->get_RPM()
+	    //      << endl;
 
-	pitch_envelope.setStep  ( 0, 0.01, pitch );
-	volume_envelope.setStep ( 0, 0.01, volume );
+	    double pitch = 0.3 + rpm_factor * 3.0;
+	
+	    // don't run at absurdly slow rates -- not realistic
+	    // and sounds bad to boot.  :-)
+	    if (pitch < 0.7) { 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();
     }
@@ -1019,7 +1027,7 @@ 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();
 	}
 	
@@ -1027,9 +1035,9 @@ 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 "
@@ -1056,7 +1064,7 @@ 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,
@@ -1084,7 +1092,7 @@ 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;
@@ -1100,13 +1108,13 @@ static void fgIdleFunction ( void ) {
 	}
 #endif // WIN32
 
-	if ( current_options.get_sound() ) {
+	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() );
+	    FGPath slfile( globals->get_options()->get_fg_root() );
 	    slfile.append( "Sounds/wasp.wav" );
 
 	    s1 = new slSample ( (char *)slfile.c_str() );
@@ -1140,6 +1148,10 @@ static void fgIdleFunction ( void ) {
 
 	// 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 ) {
@@ -1148,7 +1160,7 @@ static void fgIdleFunction ( void ) {
 
 	fgMainLoop();
     } else {
-	if ( current_options.get_splash_screen() == 1 ) {
+	if ( globals->get_options()->get_splash_screen() == 1 ) {
 	    fgSplashUpdate(0.0);
 	}
     }
@@ -1157,44 +1169,34 @@ 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 );
+    if ( ! fgPanelVisible() || idle_state != 1000 ) {
+	globals->get_options()->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) );
-	glViewport(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_options()->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();
-
-    // 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 );
+    globals->get_options()->set_xsize( width );
+    globals->get_options()->set_ysize( height );
 
-    // glViewport ( 0, 0, width, height );
-    float fov = current_options.get_fov();
-    ssgSetFOV(fov * current_view.get_win_ratio(), fov);
+    float fov = globals->get_options()->get_fov();
+    ssgSetFOV(fov, fov * globals->get_options()->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.
-	current_view.UpdateViewParams(cur_view_fdm);
-    }
 }
 
 
 // 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.
     glutInit(argc, argv);
@@ -1204,24 +1206,25 @@ int fgGlutInit( int *argc, char **argv ) {
     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
-    glutInitWindowSize( 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
-	glutCreateWindow("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=%d",
-		 current_options.get_xsize(),
-		 current_options.get_ysize(),
-		 current_options.get_bpp());
+		 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 );
@@ -1236,8 +1239,11 @@ 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
@@ -1252,16 +1258,16 @@ 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" );
@@ -1307,7 +1313,7 @@ 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 );
@@ -1320,12 +1326,50 @@ 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();
 
-    aircraft_dir = ""; // Initialize the Aircraft directory to "" (UIUC)
+    // 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 );
+
+    FGViewMgr *viewmgr = new FGViewMgr;
+    globals->set_viewmgr( viewmgr );
+
+    FGViewerRPH *pv = new FGViewerRPH;
+    globals->get_viewmgr()->add_view( pv );
+    globals->set_current_view( pv );
+
+    // 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) ) {
@@ -1355,13 +1399,68 @@ 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
-    FGTime::cur_time_params = new FGTime();
-    // FGTime::cur_time_params->init( cur_fdm_state->get_Longitude(), 
-    //                                cur_fdm_state->get_Latitude() );
-    // FGTime::cur_time_params->update( cur_fdm_state->get_Longitude() );
-    FGTime::cur_time_params->init( 0.0, 0.0 );
-    FGTime::cur_time_params->update( 0.0, 0.0, 0.0 );
+    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()) {
@@ -1375,11 +1474,11 @@ 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" );
   
@@ -1391,24 +1490,40 @@ int main( int argc, char **argv ) {
     scene->setName( "Scene" );
 
     // Initialize the sky
-    FGPath ephem_data_path( current_options.get_fg_root() );
+    FGPath ephem_data_path( globals->get_options()->get_fg_root() );
     ephem_data_path.append( "Astro" );
-    ephem = new FGEphemeris( ephem_data_path.c_str() );
-    ephem->update( FGTime::cur_time_params, 0.0 );
+    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( current_options.get_fg_root() );
+    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,
-		   ephem->getNumPlanets(), 
-		   ephem->getPlanets(), 60000.0,
-		   ephem->getNumStars(),
-		   ephem->getStars(), 60000.0 );
-    thesky->add_cloud_layer( 1500.0 );
-    thesky->add_cloud_layer( 2100.0 );
+		   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;
@@ -1418,20 +1533,38 @@ int main( int argc, char **argv ) {
     // temporary visible aircraft "own ship"
     penguin_sel = new ssgSelector;
     penguin_pos = new ssgTransform;
-    // ssgBranch *tux_obj = ssgMakeSphere( 10.0, 10, 10 );
-    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
-    if ( current_options.get_network_olk() ) {
+    if ( globals->get_options()->get_network_olk() ) {
 	printf("Multipilot mode %s\n", fg_net_init( scene ) );
     }
 #endif
@@ -1446,3 +1579,107 @@ int main( int argc, char **argv ) {
     // etc.
     return 0;
 }
+
+
+// $$$ end - added VS Renganathan, 15 Oct 2K
+void fgLoadDCS(void) {
+
+    string obj_filename;
+
+    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];
+    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