]> git.mxchange.org Git - flightgear.git/blobdiff - src/Main/main.cxx
Renamed to hud_gaug.cxx
[flightgear.git] / src / Main / main.cxx
index 3dbf405dcfe1bec316a7981ee8c0b7294d8b9937..d120c8f58d5d7ecf63f478416aa63d1d6a1aeffe 100644 (file)
 #  include <config.h>
 #endif
 
-#ifdef FG_MATH_EXCEPTION_CLASH
+#include <simgear/compiler.h>
+#include <simgear/misc/exception.hxx>
+
+#ifdef SG_MATH_EXCEPTION_CLASH
 #  include <math.h>
 #endif
 
 #ifdef HAVE_WINDOWS_H
-#  include <windows.h>                     
-#  include <float.h>                    
+#  include <windows.h>
+#  include <float.h>
 #endif
 
 #include <GL/glut.h>
-#include <simgear/xgl/xgl.h>
+#include <GL/gl.h>
 
 #include <stdio.h>
 #include <string.h>
 #endif
 
 #ifdef HAVE_SYS_STAT_H
-#  include <sys/stat.h> /* for stat() */
+#  include <sys/stat.h>                // for stat()
 #endif
 
 #ifdef HAVE_UNISTD_H
-#  include <unistd.h>    /* for stat() */
+#  include <unistd.h>          // for stat()
 #endif
 
-#include <plib/pu.h>                   // plib include
-#include <plib/ssg.h>          // plib include
+// #ifdef HAVE_LIBX11
+// #  include <GL/glext.h>
+// #endif
 
-#ifdef ENABLE_AUDIO_SUPPORT
-#  include <plib/sl.h>         // plib include
-#  include <plib/sm.h>         // plib include
-#endif
+#include <plib/netChat.h>
+#include <plib/pu.h>
+#include <plib/ssg.h>
 
 #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/math/sg_random.h>
+#include <simgear/misc/sg_path.hxx>
 #include <simgear/sky/sky.hxx>
 #include <simgear/timing/sg_time.hxx>
 #include <simgear/timing/lowleveltime.h>
 
 #include <FDM/UIUCModel/uiuc_aircraftdir.h>
 #include <GUI/gui.h>
-#include <Joystick/joystick.hxx>
+#include <GUI/sgVec3Slider.hxx>
+// #include <Joystick/joystick.hxx>
 #ifdef FG_NETWORK_OLK
 #include <NetworkOLK/network.h>
 #endif
+#include <Objects/matlib.hxx>
 #include <Scenery/scenery.hxx>
 #include <Scenery/tilemgr.hxx>
+#ifdef ENABLE_AUDIO_SUPPORT
+#  include <Sound/soundmgr.hxx>
+#  include <Sound/morse.hxx>
+#endif
 #include <Time/event.hxx>
 #include <Time/fg_timer.hxx>
+#include <Time/light.hxx>
 #include <Time/sunpos.hxx>
 #include <Time/tmp.hxx>
 
-// $$$ begin - added VS Renganathan
-#include <simgear/misc/fgstream.hxx>
+#include <Input/input.hxx>
+
+// begin - added Venky
+//    $$$ begin - added VS Renganathan
+#include <simgear/misc/sgstream.hxx>
 #include <FDM/flight.hxx>
+#include <FDM/ADA.hxx>
 void fgLoadDCS (void);
 void fgUpdateDCS (void);
-ssgSelector *ship_sel = NULL;
-ssgTransform *ship_pos = NULL;
-//int totalDCSobj = 0;
-// $$$ end - added VS Renganathan
+ssgSelector *ship_sel=NULL;
+// upto 32 instances of a same object can be loaded.
+ssgTransform *ship_pos[32];
+double obj_lat[32],obj_lon[32],obj_alt[32];
+int objc=0;
+//    $$$ end - added VS Renganathan
+// end - added Venky
 
 #ifndef FG_OLD_WEATHER
 #  include <WeatherCM/FGLocalWeatherDatabase.h>
@@ -110,20 +127,15 @@ ssgTransform *ship_pos = NULL;
 
 #include "version.h"
 
-#include "bfi.hxx"
 #include "fg_init.hxx"
 #include "fg_io.hxx"
+#include "fg_props.hxx"
 #include "globals.hxx"
-#include "keyboard.hxx"
 #include "splash.hxx"
+#include "viewmgr.hxx"
 
-
-// -dw- use custom sioux settings so I can see output window
 #ifdef macintosh
-#  ifndef FG_NDEBUG
-#    include <sioux.h> // settings for output window
-#  endif
-#  include <console.h>
+#  include <console.h>         // -dw- for command line dialog
 #endif
 
 
@@ -134,38 +146,40 @@ 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;
+static long 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 ) ;
-slEnvelope volume_envelope ( 1, SL_SAMPLE_ONE_SHOT ) ;
-slScheduler *audio_sched;
-smMixer *audio_mixer;
-slSample *s1;
-slSample *s2;
+   static FGSimpleSound *s1;
+   static FGSimpleSound *s2;
 #endif
 
 
 // ssg variables
 ssgRoot *scene = NULL;
 ssgBranch *terrain = NULL;
-ssgSelector *penguin_sel = NULL;
-ssgTransform *penguin_pos = NULL;
+
+// aircraft model stuff
+ssgSelector *acmodel_selector = NULL;
+ssgTransform *acmodel_pos = NULL;
+ssgSelector *prop_selector = NULL;
+ssgSelector *flaps_selector = NULL;
+int acmodel_npropsettings;
+int acmodel_proprpms[4][2];  // different propeller settings
+
+ssgRoot *lighting = NULL;
+ssgBranch *ground = NULL;
+ssgBranch *airport = NULL;
 
 #ifdef FG_NETWORK_OLK
 ssgSelector *fgd_sel = NULL;
 ssgTransform *fgd_pos = NULL;
-//sgMat4 sgTUX;
 #endif
 
 // current fdm/position used for view
@@ -235,6 +249,23 @@ void fgBuildRenderStates( void ) {
     menus->enable( GL_BLEND );
 }
 
+// fgFindNode -- a function that finds a named node in an ssg graph
+ssgEntity *fgFindNode( ssgEntity *node, const char *name ) {
+  if ( node->getName() != NULL && strcmp( name, node->getName() ) == 0 ) {
+    return node;
+  } else if ( node->isAKindOf( ssgTypeBranch() ) ) {
+    ssgEntity *kid = ((ssgBranch*)node)->getKid(0);
+    while (kid != NULL) {
+      ssgEntity *n = fgFindNode(kid, name);
+      if (n != NULL)
+       return n;
+
+      kid = ((ssgBranch*)node)->getNextKid();
+    }
+  }
+
+  return NULL;
+}
 
 // fgInitVisuals() -- Initialize various GL/view parameters
 void fgInitVisuals( void ) {
@@ -244,7 +275,7 @@ void fgInitVisuals( void ) {
 
 #ifndef GLUT_WRONG_VERSION
     // Go full screen if requested ...
-    if ( globals->get_options()->get_fullscreen() ) {
+    if ( fgGetBool("/sim/startup/fullscreen") ) {
        glutFullScreen();
     }
 #endif
@@ -263,14 +294,14 @@ void fgInitVisuals( void ) {
 
     // 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 ( (fgGetString("/sim/rendering/fog") == "disabled") || 
+        (!fgGetBool("/sim/rendering/shading"))) {
        // if fastest fog requested, or if flat shading force fastest
        glHint ( GL_FOG_HINT, GL_FASTEST );
-    } else if ( globals->get_options()->get_fog() == 2 ) {
+    } else if ( fgGetString("/sim/rendering/fog") == "nicest" ) {
        glHint ( GL_FOG_HINT, GL_NICEST );
     }
-    if ( globals->get_options()->get_wireframe() ) {
+    if ( fgGetBool("/sim/rendering/wireframe") ) {
        // draw wire frame
        glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
     }
@@ -285,15 +316,92 @@ void fgInitVisuals( void ) {
 }
 
 
+// For HiRes screen Dumps using Brian Pauls TR Library
+void trRenderFrame( void ) {
+
+    if ( fgPanelVisible() ) {
+        GLfloat height = fgGetInt("/sim/startup/ysize");
+        GLfloat view_h =
+            (current_panel->getViewHeight() - current_panel->getYOffset())
+            * (height / 768.0) + 1;
+        glTranslatef( 0.0, view_h, 0.0 );
+    }
+
+    static double m_log01      = -log( 0.01 );
+    static double sqrt_m_log01 = sqrt( m_log01 );
+
+    static GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
+    static GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
+
+    fgLIGHT *l = &cur_light_params;
+
+    glClearColor(l->adj_fog_color[0], l->adj_fog_color[1], 
+                 l->adj_fog_color[2], l->adj_fog_color[3]);
+
+    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+    // set the opengl state to known default values
+    default_state->force();
+
+    // update fog params
+    double actual_visibility       = thesky->get_visibility();
+    // GLfloat fog_exp_density        = m_log01 / actual_visibility;
+    GLfloat fog_exp2_density       = sqrt_m_log01 / actual_visibility;
+    GLfloat fog_exp2_punch_through = sqrt_m_log01 / ( actual_visibility * 1.5 );
+
+    glEnable( GL_FOG );
+    glFogf  ( GL_FOG_DENSITY, fog_exp2_density);
+    glFogi  ( GL_FOG_MODE,    GL_EXP2 );
+    glFogfv ( GL_FOG_COLOR,   l->adj_fog_color );
+
+    // GL_LIGHT_MODEL_AMBIENT has a default non-zero value so if
+    // we only update GL_AMBIENT for our lights we will never get
+    // a completely dark scene.  So, we set GL_LIGHT_MODEL_AMBIENT
+    // explicitely to black.
+    glLightModelfv( GL_LIGHT_MODEL_AMBIENT, black );
+
+    ssgGetLight( 0 ) -> setColour( GL_AMBIENT, l->scene_ambient );
+
+    // texture parameters
+    glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
+    glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
+
+    // we need a white diffuse light for the phase of the moon
+    ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, white );
+    thesky->preDraw();
+
+    // draw the ssg scene
+    // return to the desired diffuse color
+    ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
+    glEnable( GL_DEPTH_TEST );
+    ssgCullAndDraw( scene );
+
+    // draw the lights
+    glFogf (GL_FOG_DENSITY, fog_exp2_punch_through);
+    ssgCullAndDraw( lighting );
+
+    thesky->postDraw( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER );
+
+    // need to do this here as hud_and_panel state is static to
+    // main.cxx  and HUD and Panel routines have to be called with
+    // knowledge of the the TR struct < see gui.cxx::HighResDump()
+    hud_and_panel->apply();
+}
+
+
 // Update all Visuals (redraws anything graphics related)
 void fgRenderFrame( void ) {
-    // Update the BFI.
-    FGBFI::update();
+    // Update the default (kludged) properties.
+    fgUpdateProps();
 
     fgLIGHT *l = &cur_light_params;
     static double last_visibility = -9999;
 
-    double angle;
+    static GLfloat fog_exp_density;
+    static GLfloat fog_exp2_density;
+    static GLfloat fog_exp2_punch_through;
+    
+    // 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 };
@@ -302,7 +410,7 @@ void fgRenderFrame( void ) {
     
     if ( idle_state != 1000 ) {
        // still initializing, draw the splash screen
-       if ( globals->get_options()->get_splash_screen() == 1 ) {
+       if ( fgGetBool("/sim/startup/splash-screen") ) {
            fgSplashUpdate(0.0);
        }
     } else {
@@ -311,38 +419,115 @@ void fgRenderFrame( void ) {
        // now work without seg faulting the system.
 
        // printf("Ground = %.2f  Altitude = %.2f\n", scenery.cur_elev, 
-       //        FG_Altitude * FEET_TO_METER);
+       //        FG_Altitude * SG_FEET_TO_METER);
     
        // this is just a temporary hack, to make me understand Pui
        // timerText -> setLabel (ctime (&t->cur_time));
        // end of hack
 
-       // update view volume parameters
-       // cout << "before pilot_view update" << endl;
-        if ( globals->get_options()->get_view_mode()
-            == FGOptions::FG_VIEW_FOLLOW )
-       {
-           float * offset = globals->get_pilot_view()->get_pilot_offset();
-           globals->get_current_view()->set_pilot_offset( offset[0],
-                                                          offset[1],
-                                                          offset[2] );
+       // 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() *
+                                      SG_FEET_TO_METER );
+       pilot_view->set_sea_level_radius( cur_fdm_state->
+                                         get_Sea_level_radius() *
+                                         SG_FEET_TO_METER ); 
+       pilot_view->set_rph( cur_fdm_state->get_Phi(),
+                            cur_fdm_state->get_Theta(),
+                            cur_fdm_state->get_Psi() );
+
+       FGViewerLookAt *chase_view =
+           (FGViewerLookAt *)globals->get_viewmgr()->get_view( 1 );
+
+       sgVec3 po;              // chase view pilot_offset
+       sgVec3 wup;             // chase view world up
+       sgSetVec3( po, 0.0, 0.0, 100.0 );
+       sgCopyVec3( wup, pilot_view->get_world_up() );
+       sgMat4 CXFM;            // chase view + pilot offset xform
+       sgMakeRotMat4( CXFM,
+                      chase_view->get_view_offset() * SGD_RADIANS_TO_DEGREES -
+                      cur_fdm_state->get_Psi() * SGD_RADIANS_TO_DEGREES,
+                      wup );
+       sgVec3 npo;             // new pilot offset after rotation
+        sgVec3 *pPO = PilotOffsetGet();
+       sgXformVec3( po, *pPO, pilot_view->get_UP() );
+       sgXformVec3( npo, po, CXFM );
+
+       chase_view->set_geod_view_pos( cur_fdm_state->get_Longitude(), 
+                                      cur_fdm_state->get_Lat_geocentric(), 
+                                      cur_fdm_state->get_Altitude() *
+                                      SG_FEET_TO_METER );
+       chase_view->set_sea_level_radius( cur_fdm_state->
+                                         get_Sea_level_radius() *
+                                         SG_FEET_TO_METER );
+       chase_view->set_pilot_offset( npo[0], npo[1], npo[2] );
+       chase_view->set_view_forward( pilot_view->get_view_pos() ); 
+       chase_view->set_view_up( wup );
+
+#if 0
+       sgMat4 rph;
+       sgCopyMat4( rph, pilot_view->get_VIEW() );
+       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, chase_view->get_VIEW() );
+       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 port
+       fgReshape( fgGetInt("/sim/startup/xsize"),
+                  fgGetInt("/sim/startup/ysize") );
+
+#if 0
+       // swing and a miss
+
+       if ( ! fgPanelVisible() ) {
+           xglViewport( 0, 0 ,
+                        (GLint)(fgGetInt("/sim/startup/xsize")),
+                        (GLint)(fgGetInt("/sim/startup/ysize")) );
        } else {
-           globals->get_current_view()->set_pilot_offset(0.0, 0.0, 0.0);
+           int view_h =
+               int( (current_panel->getViewHeight() -
+                     current_panel->getYOffset())
+                    * (fgGetInt("/sim/startup/ysize") / 768.0) );
+           glViewport( 0, 
+                       (GLint)(fgGetInt("/sim/startup/ysize") - view_h),
+                       (GLint)(fgGetInt("/sim/startup/xsize")),
+                       (GLint)(view_h) );
        }
-       globals->get_pilot_view()->UpdateViewParams(*cur_fdm_state);
-       // cout << "after pilot_view update" << endl;
-       globals->get_current_view()->UpdateViewParams(cur_view_fdm);
+#endif
 
        // set the sun position
        glLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
 
        clear_mask = GL_DEPTH_BUFFER_BIT;
-       if ( globals->get_options()->get_wireframe() ) {
+       if ( fgGetBool("/sim/rendering/wireframe") ) {
            clear_mask |= GL_COLOR_BUFFER_BIT;
        }
 
-       if ( globals->get_options()->get_skyblend() ) {
-           if ( globals->get_options()->get_textures() ) {
+       if ( fgGetBool("/sim/rendering/skyblend") ) {
+           if ( fgGetBool("/sim/rendering/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]);
@@ -363,15 +548,7 @@ void fgRenderFrame( void ) {
        // ssg does to set up the model view matrix
        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 ) ;
-       glLoadMatrixf( (float *)view_mat );
-       */
+       ssgSetCamera( (sgVec4 *)globals->get_current_view()->get_VIEW() );
 
        // set the opengl state to known default values
        default_state->force();
@@ -383,11 +560,10 @@ void fgRenderFrame( void ) {
        thesky->set_visibility( current_weather.get_visibility() );
 #endif
 
-       thesky->modify_vis( cur_fdm_state->get_Altitude() * FEET_TO_METER,
-                               
+       thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
                            ( global_multi_loop * 
-                             globals->get_options()->get_speed_up() ) /
-                           (double)globals->get_options()->get_model_hz() );
+                             fgGetInt("/sim/speed-up") ) /
+                           (double)fgGetInt("/sim/model-hz") );
 
        double actual_visibility = thesky->get_visibility();
        // cout << "actual visibility = " << actual_visibility << endl;
@@ -397,33 +573,20 @@ void fgRenderFrame( void ) {
 
            // 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);
+           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);
+           fog_exp2_punch_through = sqrt( -log(0.01) ) / 
+               ( actual_visibility * 1.5 );
        }
-       // 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() );
 
+       // Set correct opengl fog density
+       glFogf (GL_FOG_DENSITY, fog_exp2_density);
+
+       // update the sky dome
+       if ( fgGetBool("/sim/rendering/skyblend") ) {
            /* cout << "thesky->repaint() sky_color = "
                 << cur_light_params.sky_color[0] << " "
                 << cur_light_params.sky_color[1] << " "
@@ -459,11 +622,12 @@ void fgRenderFrame( void ) {
                 << " 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(),
+           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_fdm_state->get_Altitude() * SG_FEET_TO_METER,
                                cur_light_params.sun_rotation,
                                globals->get_time_params()->getGst(),
                                globals->get_ephem()->getSunRightAscension(),
@@ -475,43 +639,41 @@ void fgRenderFrame( void ) {
        }
 
        glEnable( GL_DEPTH_TEST );
-       if ( globals->get_options()->get_fog() > 0 ) {
+       if ( fgGetString("/sim/rendering/fog") != (string)"disabled" ) {
            glEnable( GL_FOG );
            glFogi( GL_FOG_MODE, GL_EXP2 );
            glFogfv( GL_FOG_COLOR, l->adj_fog_color );
        }
 
-       // set lighting parameters
+       // set sun/lighting parameters
+       ssgGetLight( 0 ) -> setPosition( l->sun_vec );
+
+        // GL_LIGHT_MODEL_AMBIENT has a default non-zero value so if
+        // we only update GL_AMBIENT for our lights we will never get
+        // a completely dark scene.  So, we set GL_LIGHT_MODEL_AMBIENT
+        // explicitely to black.
        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 );
+       GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
+       glLightModelfv( GL_LIGHT_MODEL_AMBIENT, black );
+
+       ssgGetLight( 0 ) -> setColour( GL_AMBIENT, l->scene_ambient );
+       ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
+       // ssgGetLight( 0 ) -> setColour( GL_SPECULAR, l->scene_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 );
 
        // glMatrixMode( GL_PROJECTION );
        // glLoadIdentity();
-       float fov = globals->get_options()->get_fov();
-       // ssgSetFOV(fov * current_view.get_win_ratio(), fov);
+       float fov = globals->get_current_view()->get_fov();
        ssgSetFOV(fov, fov * globals->get_current_view()->get_win_ratio());
 
-       double agl = current_aircraft.fdm_state->get_Altitude() * FEET_TO_METER
+       double agl = current_aircraft.fdm_state->get_Altitude() * SG_FEET_TO_METER
            - scenery.cur_elev;
 
-       // FG_LOG( FG_ALL, FG_INFO, "visibility is " 
+       // SG_LOG( SG_ALL, SG_INFO, "visibility is " 
        //         << current_weather.get_visibility() );
            
        if ( agl > 10.0 ) {
@@ -520,26 +682,18 @@ void fgRenderFrame( void ) {
            ssgSetNearFar( 0.5f, 120000.0f );
        }
 
-       if ( globals->get_options()->get_view_mode() == 
-            FGOptions::FG_VIEW_PILOT )
-        {
-           // disable TuX
-           penguin_sel->select(0);
-       } 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);
+       if ( globals->get_viewmgr()->get_current() == 0 ) {
+           // disable aircraft model
+           acmodel_selector->select(0);
+       } else { 
+           // enable aircraft model and set up its position and orientation
+           acmodel_selector->select(1);
+
+           FGViewerRPH *pilot_view =
+               (FGViewerRPH *)globals->get_viewmgr()->get_view( 0 );
 
            sgMat4 sgTRANS;
-           sgMakeTransMat4( sgTRANS, 
-                            globals->get_pilot_view()->get_view_pos().x(),
-                            globals->get_pilot_view()->get_view_pos().y(),
-                            globals->get_pilot_view()->get_view_pos().z() );
+           sgMakeTransMat4( sgTRANS, pilot_view->get_view_pos() );
 
            sgVec3 ownship_up;
            sgSetVec3( ownship_up, 0.0, 0.0, 1.0);
@@ -555,12 +709,29 @@ void fgRenderFrame( void ) {
            // sgTUX = ( sgROT * pilot_view.VIEW_ROT ) * sgTRANS
            sgMat4 sgTUX;
            sgCopyMat4( sgTUX, sgROT );
-           sgPostMultMat4( sgTUX, globals->get_pilot_view()->get_VIEW_ROT() );
+           sgPostMultMat4( sgTUX, pilot_view->get_VIEW_ROT() );
            sgPostMultMat4( sgTUX, sgTRANS );
        
            sgCoord tuxpos;
            sgSetCoord( &tuxpos, sgTUX );
-           penguin_pos->setTransform( &tuxpos );
+           acmodel_pos->setTransform( &tuxpos );
+
+           // set up moving parts
+           if (flaps_selector != NULL) {
+               flaps_selector->select( (globals->get_controls()->get_flaps() > 0.5f) ? 1 : 2 );
+           }
+
+           if (prop_selector != NULL) {
+             int propsel_mask = 0;
+             double rpm = fgGetDouble("/engines/engine[0]/rpm");
+             for (int i = 0; i < acmodel_npropsettings; i++) {
+               if (rpm >= acmodel_proprpms[i][0] &&
+                   rpm <= acmodel_proprpms[i][1]) {
+                 propsel_mask |= 1 << i;
+               }
+             }
+             prop_selector->select(propsel_mask);
+           }
        }
 
        // $$$ begin - added VS Renganthan 17 Oct 2K
@@ -568,7 +739,7 @@ void fgRenderFrame( void ) {
        // $$$ end - added VS Renganthan 17 Oct 2K
 
 # ifdef FG_NETWORK_OLK
-       if ( globals->get_options()->get_network_olk() ) {
+       if ( fgGetBool("/sim/networking/network-olk") ) {
            sgCoord fgdpos;
            other = head->next;             /* put listpointer to start  */
            while ( other != tail) {        /* display all except myself */
@@ -588,41 +759,58 @@ 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();
-       // }
+       if ( fgGetBool("/sim/rendering/skyblend") ) {
+           // draw the sky backdrop
 
-       // draw the sky backdrop
-       thesky->preDraw();
+            // we need a white diffuse light for the phase of the moon
+            ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, white );
+
+           thesky->preDraw();
+
+            // return to the desired diffuse color
+            ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
+       }
 
        // draw the ssg scene
        glEnable( GL_DEPTH_TEST );
        ssgCullAndDraw( scene );
 
-       // draw the sky cloud layers
-       thesky->postDraw( cur_fdm_state->get_Altitude() * FEET_TO_METER );
+       // change state for lighting here
+
+       // draw lighting
+       // Set punch through fog density
+       glFogf (GL_FOG_DENSITY, fog_exp2_punch_through);
+
+       ssgCullAndDraw( lighting );
+
+       if ( fgGetBool("/sim/rendering/skyblend") ) {
+           // draw the sky cloud layers
+           thesky->postDraw( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER );
+       }
 
        // display HUD && Panel
        glDisable( GL_FOG );
        glDisable( GL_DEPTH_TEST );
        // glDisable( GL_CULL_FACE );
        // glDisable( GL_TEXTURE_2D );
+
+       // update the input subsystem
+       current_input.update();
+
+       // update the controls subsystem
+       globals->get_controls()->update();
+
        hud_and_panel->apply();
        fgCockpitUpdate();
 
+       // update the panel subsystem
+       if (current_panel != 0)
+         current_panel->update();
+
        // We can do translucent menus, so why not. :-)
-       // glEnable ( GL_BLEND ) ;
        menus->apply();
        glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
        puDisplay();
@@ -636,103 +824,110 @@ 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;
+void fgUpdateTimeDepCalcs() {
+    static bool inited = false;
+
     fgLIGHT *l = &cur_light_params;
     int i;
 
-    // update the flight model
-    if ( multi_loop < 0 ) {
-       multi_loop = 1;
-    }
+    long multi_loop = 1;
 
     if ( !globals->get_freeze() && !initial_freeze ) {
-       // run Autopilot system
-       current_autopilot->run();
-
-       // printf("updating flight model x %d\n", multi_loop);
-       /* fgFDMUpdate( globals->get_options()->get_flight_model(), 
-                    fdm_state, 
-                    multi_loop * globals->get_options()->get_speed_up(),
-                    remainder ); */
-       cur_fdm_state->update( multi_loop *
-                              globals->get_options()->get_speed_up() );
-       FGSteam::update( multi_loop * globals->get_options()->get_speed_up() );
+       // conceptually, this could be done for each fdm instance ...
+
+       if ( !inited ) {
+           cur_fdm_state->stamp();
+           inited = true;
+       }
+
+       SGTimeStamp current;
+       current.stamp();
+       long elapsed = current - cur_fdm_state->get_time_stamp();
+       cur_fdm_state->set_time_stamp( current );
+       elapsed += cur_fdm_state->get_remainder();
+       // cout << "elapsed = " << elapsed << endl;
+       // cout << "dt = " << cur_fdm_state->get_delta_t() << endl;
+       multi_loop = (long)(((double)elapsed * 0.000001) /
+                              cur_fdm_state->get_delta_t() );
+       cur_fdm_state->set_multi_loop( multi_loop );
+       long remainder = elapsed - (long)( (multi_loop*1000000) *
+                                    cur_fdm_state->get_delta_t() );
+       cur_fdm_state->set_remainder( remainder );
+       // cout << "remainder = " << remainder << endl;
+
+       // chop max interations to something reasonable if the sim was
+       // delayed for an excesive amount of time
+       if ( multi_loop > 2.0 / cur_fdm_state->get_delta_t() ) {
+           multi_loop = (int)(2.0 / cur_fdm_state->get_delta_t());
+           cur_fdm_state->set_remainder( 0 );
+       }
+
+       // cout << "multi_loop = " << multi_loop << endl;
+       for ( i = 0; i < multi_loop * fgGetInt("/sim/speed-up"); ++i ) {
+           // run Autopilot system
+           current_autopilot->run();
+
+           // update autopilot
+           cur_fdm_state->update( 1 );
+       }
+       FGSteam::update( multi_loop * fgGetInt("/sim/speed-up") );
     } else {
-       // 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 ) {
+       //if ( global_tile_mgr.queue_size() == 0 ) {
            initial_freeze = false;
-       }
-    }
-
-    fdm_list.push_back( *cur_fdm_state );
-    while ( fdm_list.size() > 15 ) {
-       fdm_list.pop_front();
+           //}
     }
 
-    if ( globals->get_options()->get_view_mode() == FGOptions::FG_VIEW_PILOT ) {
+    if ( fgGetString("/sim/view-mode") == "pilot" ) {
        cur_view_fdm = *cur_fdm_state;
        // do nothing
-    } else if ( globals->get_options()->get_view_mode()
-               == FGOptions::FG_VIEW_FOLLOW )
-    {
-       cur_view_fdm = fdm_list.front();
     }
 
     // update the view angle
+    FGViewer *v = globals->get_current_view();
     for ( i = 0; i < multi_loop; i++ ) {
-       if ( fabs(globals->get_current_view()->get_goal_view_offset() - 
-                 globals->get_current_view()->get_view_offset()) < 0.05 )
-       {
-           globals->get_current_view()->set_view_offset( globals->get_current_view()->get_goal_view_offset() );
+       if ( fabs(v->get_goal_view_offset() - v->get_view_offset()) < 0.05 ) {
+           v->set_view_offset( v->get_goal_view_offset() );
            break;
        } else {
            // 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 ( v->get_goal_view_offset() > v->get_view_offset() )
             {
-               if ( globals->get_current_view()->get_goal_view_offset() - 
-                    globals->get_current_view()->get_view_offset() < FG_PI )
-                {
-                   globals->get_current_view()->inc_view_offset( 0.01 );
+               if ( v->get_goal_view_offset() - v->get_view_offset() < SGD_PI ){
+                   v->inc_view_offset( 0.01 );
                } else {
-                   globals->get_current_view()->inc_view_offset( -0.01 );
+                   v->inc_view_offset( -0.01 );
                }
            } else {
-               if ( globals->get_current_view()->get_view_offset() - 
-                    globals->get_current_view()->get_goal_view_offset() <
-                    FG_PI )
-                {
-                   globals->get_current_view()->inc_view_offset( -0.01 );
+               if ( v->get_view_offset() - v->get_goal_view_offset() < SGD_PI ){
+                   v->inc_view_offset( -0.01 );
                } else {
-                   globals->get_current_view()->inc_view_offset( 0.01 );
+                   v->inc_view_offset( 0.01 );
                }
            }
-           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 );
+           if ( v->get_view_offset() > SGD_2PI ) {
+               v->inc_view_offset( -SGD_2PI );
+           } else if ( v->get_view_offset() < 0 ) {
+               v->inc_view_offset( SGD_2PI );
            }
        }
     }
 
-    double tmp = -(l->sun_rotation + FG_PI) 
+    double tmp = -(l->sun_rotation + SGD_PI) 
        - (cur_fdm_state->get_Psi() -
           globals->get_current_view()->get_view_offset() );
     while ( tmp < 0.0 ) {
-       tmp += FG_2PI;
+       tmp += SGD_2PI;
     }
-    while ( tmp > FG_2PI ) {
-       tmp -= FG_2PI;
+    while ( tmp > SGD_2PI ) {
+       tmp -= SGD_2PI;
     }
     /* printf("Psi = %.2f, viewoffset = %.2f sunrot = %.2f rottosun = %.2f\n",
-          FG_Psi * RAD_TO_DEG, current_view.view_offset * RAD_TO_DEG
-          -(l->sun_rotation+FG_PI) * RAD_TO_DEG, tmp * RAD_TO_DEG); */
+          FG_Psi * SGD_RADIANS_TO_DEGREES, current_view.view_offset * SGD_RADIANS_TO_DEGREES
+          -(l->sun_rotation+SGD_PI) * SGD_RADIANS_TO_DEGREES, tmp * SGD_RADIANS_TO_DEGREES); */
     l->UpdateAdjFog();
 
     // Update solar system
@@ -741,9 +936,7 @@ void fgUpdateTimeDepCalcs(int multi_loop, int remainder) {
                                  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 );
+    current_radiostack->update();
 }
 
 
@@ -751,14 +944,14 @@ void fgInitTimeDepCalcs( void ) {
     // initialize timer
 
     // #ifdef HAVE_SETITIMER
-    //   fgTimerInit( 1.0 / globals->get_options()->get_model_hz(), 
+    //   fgTimerInit( 1.0 / fgGetInt("/sim/model-hz"), 
     //                fgUpdateTimeDepCalcs );
     // #endif HAVE_SETITIMER
 }
 
 
 static const double alt_adjust_ft = 3.758099;
-static const double alt_adjust_m = alt_adjust_ft * FEET_TO_METER;
+static const double alt_adjust_m = alt_adjust_ft * SG_FEET_TO_METER;
 
 
 // What should we do when we have nothing else to do?  Let's get ready
@@ -776,11 +969,11 @@ static void fgMainLoop( void ) {
 
     SGTime *t = globals->get_time_params();
 
-    FG_LOG( FG_ALL, FG_DEBUG, "Running Main Loop");
-    FG_LOG( FG_ALL, FG_DEBUG, "======= ==== ====");
+    SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
+    SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
 
 #ifdef FG_NETWORK_OLK
-    if ( globals->get_options()->get_network_olk() ) {
+    if ( fgGetBool("/sim/networking/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
@@ -791,10 +984,10 @@ static void fgMainLoop( void ) {
 
 #if defined( ENABLE_PLIB_JOYSTICK )
     // Read joystick and update control settings
-    if ( globals->get_options()->get_control_mode() == FGOptions::FG_JOYSTICK )
-    {
-       fgJoystickRead();
-    }
+    // if ( fgGetString("/sim/control-mode") == "joystick" )
+    // {
+    //    fgJoystickRead();
+    // }
 #elif defined( ENABLE_GLUT_JOYSTICK )
     // Glut joystick support works by feeding a joystick handler
     // function to glut.  This is taken care of once in the joystick
@@ -810,33 +1003,33 @@ static void fgMainLoop( void ) {
 
     /* printf("Before - ground = %.2f  runway = %.2f  alt = %.2f\n",
           scenery.cur_elev,
-          cur_fdm_state->get_Runway_altitude() * FEET_TO_METER,
-          cur_fdm_state->get_Altitude() * FEET_TO_METER); */
+          cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
+          cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
 
     if ( scenery.cur_elev > -9990 ) {
-       if ( cur_fdm_state->get_Altitude() * FEET_TO_METER < 
+       if ( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER < 
             (scenery.cur_elev + alt_adjust_m - 3.0) ) {
            // now set aircraft altitude above ground
            printf("(*) Current Altitude = %.2f < %.2f forcing to %.2f\n", 
-                  cur_fdm_state->get_Altitude() * FEET_TO_METER,
+                  cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
                   scenery.cur_elev + alt_adjust_m - 3.0,
                   scenery.cur_elev + alt_adjust_m );
-           fgFDMForceAltitude( globals->get_options()->get_flight_model(), 
+           fgFDMForceAltitude( fgGetString("/sim/flight-model"), 
                                scenery.cur_elev + alt_adjust_m );
 
-           FG_LOG( FG_ALL, FG_DEBUG, 
+           SG_LOG( SG_ALL, SG_DEBUG, 
                    "<*> resetting altitude to " 
-                   << cur_fdm_state->get_Altitude() * FEET_TO_METER
+                   << cur_fdm_state->get_Altitude() * SG_FEET_TO_METER
                    << " meters" );
        }
-       fgFDMSetGroundElevation( globals->get_options()->get_flight_model(),
-                                scenery.cur_elev );  // meters
     }
 
     /* printf("Adjustment - ground = %.2f  runway = %.2f  alt = %.2f\n",
           scenery.cur_elev,
-          cur_fdm_state->get_Runway_altitude() * FEET_TO_METER,
-          cur_fdm_state->get_Altitude() * FEET_TO_METER); */
+          cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
+          cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
+
+    // cout << "Warp = " << globals->get_warp() << endl;
 
     // update "time"
     if ( globals->get_warp_delta() != 0 ) {
@@ -854,12 +1047,12 @@ static void fgMainLoop( void ) {
     // 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,
+                               cur_fdm_state->get_Altitude()* SG_FEET_TO_METER,
                                globals->get_time_params()->getJD() );
 
     // Get elapsed time (in usec) for this past frame
     elapsed = fgGetTimeInterval();
-    FG_LOG( FG_ALL, FG_DEBUG, 
+    SG_LOG( SG_ALL, SG_DEBUG, 
            "Elapsed time interval is = " << elapsed 
            << ", previous remainder is = " << remainder );
 
@@ -885,7 +1078,7 @@ static void fgMainLoop( void ) {
 #else
     if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
        general.set_frame_rate( frames );
-       FG_LOG( FG_ALL, FG_DEBUG, 
+       SG_LOG( SG_ALL, SG_DEBUG, 
                "--> Frame rate is = " << general.get_frame_rate() );
        frames = 0;
     }
@@ -894,25 +1087,31 @@ static void fgMainLoop( void ) {
 #endif
 
     // Run flight model
-    if ( ! use_signals ) {
-       // Calculate model iterations needed for next frame
-       elapsed += remainder;
-
-       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 = " << global_multi_loop
-               << ", new remainder = " << remainder );
+
+    // Calculate model iterations needed for next frame
+    elapsed += remainder;
+
+    global_multi_loop = (long)(((double)elapsed * 0.000001) * 
+                             fgGetInt("/sim/model-hz"));
+    remainder = elapsed - ( (global_multi_loop*1000000) / 
+                           fgGetInt("/sim/model-hz") );
+    SG_LOG( SG_ALL, SG_DEBUG, 
+           "Model iterations needed = " << global_multi_loop
+           << ", new remainder = " << remainder );
        
-       // flight model
-       if ( global_multi_loop > 0 ) {
-           fgUpdateTimeDepCalcs(global_multi_loop, remainder);
-       } else {
-           FG_LOG( FG_ALL, FG_DEBUG, 
-                   "Elapsed time is zero ... we're zinging" );
-       }
+    // chop max interations to something reasonable if the sim was
+    // delayed for an excesive amount of time
+    if ( global_multi_loop > 2.0 * fgGetInt("/sim/model-hz") ) {
+       global_multi_loop = (int)(2.0 * fgGetInt("/sim/model-hz") );
+       remainder = 0;
+    }
+
+    // flight model
+    if ( global_multi_loop > 0 ) {
+       fgUpdateTimeDepCalcs();
+    } else {
+       SG_LOG( SG_ALL, SG_DEBUG, 
+               "Elapsed time is zero ... we're zinging" );
     }
 
 #if ! defined( macintosh )
@@ -921,20 +1120,27 @@ static void fgMainLoop( void ) {
 #endif
 
     // see if we need to load any new scenery tiles
-    global_tile_mgr.update( cur_fdm_state->get_Longitude() * RAD_TO_DEG,
-                           cur_fdm_state->get_Latitude() * RAD_TO_DEG );
+    global_tile_mgr.update( cur_fdm_state->get_Longitude()
+                            * SGD_RADIANS_TO_DEGREES,
+                           cur_fdm_state->get_Latitude()
+                            * SGD_RADIANS_TO_DEGREES );
+
+    // see if we need to load any deferred-load textures
+    material_lib.load_next_deferred();
 
     // Process/manage pending events
     global_events.Process();
 
     // Run audio scheduler
 #ifdef ENABLE_AUDIO_SUPPORT
-    if ( globals->get_options()->get_sound() && !audio_sched->not_working() ) {
-
-       if ( globals->get_options()->get_aircraft() == "c172" ) {
+    if ( fgGetBool("/sim/sound") && globals->get_soundmgr()->is_working() ) {
+       if ( fgGetString("/sim/aircraft") == "c172" ) {
            // pitch corresponds to rpm
            // volume corresponds to manifold pressure
 
+           // cout << "AUDIO working = "
+           //      << globals->get_soundmgr()->is_working() << endl;
+
            double rpm_factor;
            if ( cur_fdm_state->get_engine(0) != NULL ) {
                rpm_factor = cur_fdm_state->get_engine(0)->get_RPM() / 2500.0;
@@ -950,41 +1156,41 @@ static void fgMainLoop( void ) {
            // 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;
+                   cur_fdm_state->get_engine(0)->get_Manifold_Pressure() / 100;
            } else {
-               mp_factor = 1.0;
+               mp_factor = 0.3;
            }
-           // cout << "mp = " 
-           //      << cur_fdm_state->get_engine(0)->get_Manifold_Pressure()
-           //      << endl;
+           /* cout << "mp = " 
+                << cur_fdm_state->get_engine(0)->get_Manifold_Pressure()
+                << endl; */
 
-           double volume = mp_factor;
+           double volume = 0.15 + mp_factor / 2.0;
 
-           if ( volume < 0.3 ) { volume = 0.3; }
-           if ( volume > 2.0 ) { volume = 2.0; }
+           if ( volume < 0.15 ) { volume = 0.15; }
+           if ( volume > 0.5 ) { volume = 0.5; }
            // cout << "volume = " << volume << endl;
 
-           pitch_envelope.setStep  ( 0, 0.01, pitch );
-           volume_envelope.setStep ( 0, 0.01, volume );
+           s1->set_pitch( pitch );
+           s1->set_volume( 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 );
+           double param
+               = globals->get_controls()->get_throttle( 0 ) * 2.0 + 1.0;
+           s1->set_pitch( param );
+           s1->set_volume( param );
        }
 
-       audio_sched -> update();
+       globals->get_soundmgr()->update();
     }
 #endif
 
     // redraw display
     fgRenderFrame();
 
-    FG_LOG( FG_ALL, FG_DEBUG, "" );
+    SG_LOG( SG_ALL, SG_DEBUG, "" );
 }
 
 
@@ -1001,26 +1207,48 @@ static void fgIdleFunction ( void ) {
 
     if ( idle_state == 0 ) {
        // Initialize the splash screen right away
-       if ( globals->get_options()->get_splash_screen() ) {
+       if ( fgGetBool("/sim/startup/splash-screen") ) {
            fgSplashInit();
        }
        
        idle_state++;
     } else if ( idle_state == 1 ) {
+       // Initialize audio support
+#ifdef ENABLE_AUDIO_SUPPORT
+
        // Start the intro music
 #if !defined(WIN32)
-       if ( globals->get_options()->get_intro_music() ) {
-           string lockfile = "/tmp/mpg123.running";
-           FGPath mp3file( globals->get_options()->get_fg_root() );
+       if ( fgGetBool("/sim/startup/intro-music") ) {
+           SGPath mp3file( globals->get_fg_root() );
            mp3file.append( "Sounds/intro.mp3" );
 
-           string command = "(touch " + lockfile + "; mpg123 "
-               + mp3file.str() + "> /dev/null 2>&1; /bin/rm "
-               + lockfile + ") &";
-           FG_LOG( FG_GENERAL, FG_INFO, 
+           SG_LOG( SG_GENERAL, SG_INFO, 
                    "Starting intro music: " << mp3file.str() );
+
+           string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
            system ( command.c_str() );
        }
+#endif // !WIN32
+
+       FGSoundMgr *soundmgr = new FGSoundMgr;
+       globals->set_soundmgr( soundmgr );
+
+       if ( fgGetBool("/sim/sound") ) {
+           globals->get_soundmgr()->init();
+
+           s1 = new FGSimpleSound( fgGetString("/sim/sounds/engine",
+                                               "Sounds/wasp.wav") );
+           globals->get_soundmgr()->add( s1, "engine loop" );
+           globals->get_soundmgr()->play_looped( "engine loop" );
+           SG_LOG( SG_GENERAL, SG_INFO,
+                   "Rate = " << s1->get_sample()->getRate()
+                   << "  Bps = " << s1->get_sample()->getBps()
+                   << "  Stereo = " << s1->get_sample()->getStereo() );
+
+           // s2 = new FGSimpleSound( "Sounds/corflaps.wav" );
+           // s2->set_volume( 0.3 );
+           // globals->get_soundmgr()->add( s2, "flaps" );
+       }
 #endif
 
        idle_state++;
@@ -1041,7 +1269,7 @@ static void fgIdleFunction ( void ) {
        // a subsystem to flightgear, its initialization call should
        // located in this routine.
        if( !fgInitSubsystems()) {
-           FG_LOG( FG_GENERAL, FG_ALERT,
+           SG_LOG( SG_GENERAL, SG_ALERT,
                    "Subsystem initializations failed ..." );
            exit(-1);
        }
@@ -1051,81 +1279,17 @@ static void fgIdleFunction ( void ) {
        // setup OpenGL view parameters
        fgInitVisuals();
 
-       if ( use_signals ) {
-           // init timer routines, signals, etc.  Arrange for an alarm
-           // signal to be generated, etc.
-           fgInitTimeDepCalcs();
-       }
-
        idle_state++;
     } else if ( idle_state == 5 ) {
 
        idle_state++;
     } else if ( idle_state == 6 ) {
-       // Initialize audio support
-#ifdef ENABLE_AUDIO_SUPPORT
-
-#if !defined(WIN32)
-       if ( globals->get_options()->get_intro_music() ) {
-           // Let's wait for mpg123 to finish
-           string lockfile = "/tmp/mpg123.running";
-           struct stat stat_buf;
-
-           FG_LOG( FG_GENERAL, FG_INFO, 
-                   "Waiting for mpg123 player to finish ..." );
-           while ( stat(lockfile.c_str(), &stat_buf) == 0 ) {
-               // file exist, wait ...
-               sleep(1);
-               FG_LOG( FG_GENERAL, FG_INFO, ".");
-           }
-           FG_LOG( FG_GENERAL, FG_INFO, "");
-       }
-#endif // WIN32
-
-       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( 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 );
-
-           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 );
-       }
-#endif
-
        // sleep(1);
        idle_state = 1000;
 
        cout << "Panel visible = " << fgPanelVisible() << endl;
-       fgReshape( globals->get_options()->get_xsize(),
-                  globals->get_options()->get_ysize() );
+       fgReshape( fgGetInt("/sim/startup/xsize"),
+                  fgGetInt("/sim/startup/ysize") );
     } 
 
     if ( idle_state == 1000 ) {
@@ -1134,7 +1298,7 @@ static void fgIdleFunction ( void ) {
 
        fgMainLoop();
     } else {
-       if ( globals->get_options()->get_splash_screen() == 1 ) {
+       if ( fgGetBool("/sim/startup/splash-screen") ) {
            fgSplashUpdate(0.0);
        }
     }
@@ -1143,42 +1307,38 @@ 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 ) {
+    // for all views
+    for ( int i = 0; i < globals->get_viewmgr()->size(); ++i ) {
+       if ( ! fgPanelVisible() || idle_state != 1000 ) {
+           globals->get_viewmgr()->get_view(i)->
+               set_win_ratio( (float)height / (float)width );
+       } else {
+           int view_h =
+               int((current_panel->getViewHeight() -
+                    current_panel->getYOffset())
+                   * (height / 768.0)) + 1;
+           globals->get_viewmgr()->get_view(i)->
+               set_win_ratio( (float)view_h / (float)width );
+       }
+    }
+
     if ( ! fgPanelVisible() || idle_state != 1000 ) {
-       globals->get_current_view()->set_win_ratio( (float)height /
-                                                   (float)width );
        glViewport(0, 0 , (GLint)(width), (GLint)(height) );
     } else {
         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 );
+           int((current_panel->getViewHeight() - current_panel->getYOffset())
+               * (height / 768.0)) + 1;
        glViewport(0, (GLint)(height - view_h),
                   (GLint)(width), (GLint)(view_h) );
     }
 
-    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 = globals->get_options()->get_fov();
-    // float y_fov = x_fov * 1.0 / current_view.get_win_ratio();
-    // ssgSetFOV( x_fov, y_fov );
+    fgSetInt("/sim/startup/xsize", width);
+    fgSetInt("/sim/startup/ysize", height);
 
-    // glViewport ( 0, 0, width, height );
-    float fov = globals->get_options()->get_fov();
-    // ssgSetFOV(fov * current_view.get_win_ratio(), fov);
+    float fov = globals->get_current_view()->get_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.
-       globals->get_current_view()->UpdateViewParams(cur_view_fdm);
-    }
 }
 
 
@@ -1194,16 +1354,16 @@ int fgGlutInit( int *argc, char **argv ) {
     // Define Display Parameters
     glutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
 
-    FG_LOG( FG_GENERAL, FG_INFO, "Opening a window: " <<
-           globals->get_options()->get_xsize() << "x"
-           << globals->get_options()->get_ysize() );
+    SG_LOG( SG_GENERAL, SG_INFO, "Opening a window: " <<
+           fgGetInt("/sim/startup/xsize") << "x"
+           << fgGetInt("/sim/startup/ysize") );
 
     // Define initial window size
-    glutInitWindowSize( globals->get_options()->get_xsize(),
-                        globals->get_options()->get_ysize() );
+    glutInitWindowSize( fgGetInt("/sim/startup/xsize"),
+                       fgGetInt("/sim/startup/ysize") );
 
     // Initialize windows
-    if ( globals->get_options()->get_game_mode() == 0 ) {
+    if ( !fgGetBool("/sim/startup/game-mode")) {
        // Open the regular window
        glutCreateWindow("FlightGear");
 #ifndef GLUT_WRONG_VERSION
@@ -1211,11 +1371,11 @@ int fgGlutInit( int *argc, char **argv ) {
        // Open the cool new 'game mode' window
        char game_mode_str[256];
        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());
+                fgGetInt("/sim/startup/xsize"),
+                fgGetInt("/sim/startup/ysize"),
+                fgGetInt("/sim/rendering/bits-per-pixel"));
 
-       FG_LOG( FG_GENERAL, FG_INFO, 
+       SG_LOG( SG_GENERAL, SG_INFO, 
                "game mode params = " << game_mode_str );
        glutGameModeString( game_mode_str );
        glutEnterGameMode();
@@ -1228,49 +1388,18 @@ 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;
+    SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
+
+    GLint 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 );
+    SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
 
-#if 0
-    // try to determine if we should adjust the initial default
-    // display resolution.  The options class defaults (is
-    // initialized) to 640x480.
-    string renderer = general.glRenderer;
-
-    // currently we only know how to deal with Mesa/Glide/Voodoo cards
-    if ( renderer.find( "Glide" ) != string::npos ) {
-       FG_LOG( FG_GENERAL, FG_INFO, "Detected a Glide driver" );
-       if ( renderer.find( "FB/8" ) != string::npos ) {
-           // probably a voodoo-2
-           if ( renderer.find( "TMU/SLI" ) != string::npos ) {
-               // probably two SLI'd Voodoo-2's
-               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
-               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" );
-               glutReshapeWindow(800, 600);
-           }
-       } else if ( renderer.find( "FB/2" ) != string::npos ) {
-           // probably a voodoo-1, stick with the default
-       }
-    } else {
-       // we have no special knowledge of this card, stick with the default
-    }
-#endif
+    glGetIntegerv( GL_DEPTH_BITS, &tmp );
+    general.set_glDepthBits( tmp );
+    SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
 
-    return(1);
+    return 1;
 }
 
 
@@ -1280,8 +1409,10 @@ int fgGlutInitEvents( void ) {
     glutReshapeFunc( fgReshape );
 
     // call GLUTkey() on keyboard event
-    glutKeyboardFunc( GLUTkey );
-    glutSpecialFunc( GLUTspecialkey );
+    glutKeyboardFunc(GLUTkey);
+    glutKeyboardUpFunc(GLUTkeyup);
+    glutSpecialFunc(GLUTspecialkey);
+    glutSpecialUpFunc(GLUTspecialkeyup);
 
     // call guiMouseFunc() whenever our little rodent is used
     glutMouseFunc ( guiMouseFunc );
@@ -1299,8 +1430,8 @@ int fgGlutInitEvents( void ) {
 }
 
 
-// Main ...
-int main( int argc, char **argv ) {
+// Main loop
+int mainLoop( int argc, char **argv ) {
 
 #if defined( macintosh )
     freopen ("stdout.txt", "w", stdout );
@@ -1313,70 +1444,84 @@ int main( int argc, char **argv ) {
 #endif
 
     // set default log levels
-    fglog().setLogLevels( FG_ALL, FG_INFO );
-
-    FG_LOG( FG_GENERAL, FG_INFO, "FlightGear:  Version "
-           << FLIGHTGEAR_VERSION << endl );
+    sglog().setLogLevels( SG_ALL, SG_INFO );
 
-    // seed the random number generater
-    fg_srandom();
+    string version;
+#ifdef FLIGHTGEAR_VERSION
+    version = FLIGHTGEAR_VERSION;
+#else
+    version = "unknown version";
+#endif
+    SG_LOG( SG_GENERAL, SG_INFO, "FlightGear:  Version "
+           << version << endl );
 
     // Allocate global data structures.  This needs to happen before
     // we parse command line options
+
     globals = new FGGlobals;
 
+    // seed the random number generater
+    sg_srandom_time();
+
     SGRoute *route = new SGRoute;
     globals->set_route( route );
 
-    FGOptions *options = new FGOptions;
-    globals->set_options( options );
+    FGControls *controls = new FGControls;
+    globals->set_controls( controls );
+
+    FGViewMgr *viewmgr = new FGViewMgr;
+    globals->set_viewmgr( viewmgr );
+
+    FGViewerRPH *pv = new FGViewerRPH;
+    globals->get_viewmgr()->add_view( pv );
+
+    FGViewerLookAt *chase = new FGViewerLookAt;
+    globals->get_viewmgr()->add_view( chase );
+
+    string_list *col = new string_list;
+    globals->set_channel_options_list( col );
+
+    // set current view to 0 (first) which is our main pilot view
+    globals->set_current_view( globals->get_viewmgr()->get_view( 0 ) );
 
-    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");
+    // Check for the correct base package version
+    string base_version = fgBasePackageVersion();
+    if ( !(base_version == "0.7.9") ) {
+       SG_LOG( SG_GENERAL, SG_ALERT, "Base package check failed ... "
+               << "Found version " << base_version );
+        SG_LOG( SG_GENERAL, SG_ALERT, "Please upgrade to version 0.7.9" );
+       exit(-1);
     }
 
-    // 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 ..." );
+       SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
        exit(-1);
     }
 
     // Initialize the Window/Graphics environment.
     if( !fgGlutInit(&argc, argv) ) {
-       FG_LOG( FG_GENERAL, FG_ALERT, "GLUT initialization failed ..." );
+       SG_LOG( SG_GENERAL, SG_ALERT, "GLUT initialization failed ..." );
        exit(-1);
     }
 
     // Initialize the various GLUT Event Handlers.
     if( !fgGlutInitEvents() ) {
-       FG_LOG( FG_GENERAL, FG_ALERT, 
+       SG_LOG( SG_GENERAL, SG_ALERT, 
                "GLUT event handler initialization failed ..." );
        exit(-1);
     }
+
+    // Initialize plib net interface
+    netInit( &argc, argv );
+
     // Initialize ssg (from plib).  Needs to come before we do any
     // other ssg stuff, but after opengl/glut has been initialized.
     ssgInit();
@@ -1386,19 +1531,33 @@ int main( int argc, char **argv ) {
     // fonts !!!
     guiInit();
 
+#ifdef GL_EXT_texture_lod_bias
+    glTexEnvf( GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, -0.5 ) ;
+#endif
+
+#if 0
+#ifdef GL_EXT_texture_filter_anisotropic
+    float max_anisotropy;
+    glGetFloatv( GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &max_anisotropy );
+    glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT,
+                     max_anisotropy );
+    cout << "Max anisotropy = " << max_anisotropy << endl;
+#endif
+#endif
+
     // 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() );
+    // cout << "3. airport_id = " << fgGetString("/sim/startup/airport-id") << endl;
+    if ( fgGetString("/sim/startup/airport-id").length() ) {
+       // fgSetPosFromAirportID( fgGetString("/sim/startup/airport-id") );
+       fgSetPosFromAirportIDandHdg( fgGetString("/sim/startup/airport-id"),
+                                    fgGetDouble("/orientation/heading-deg") );
     }
 
     // Initialize time
-    FGPath zone( globals->get_options()->get_fg_root() );
+    SGPath zone( globals->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,
+    SGTime *t = new SGTime( fgGetDouble("/position/longitude-deg") * SGD_DEGREES_TO_RADIANS,
+                           fgGetDouble("/position/latitude-deg") * SGD_DEGREES_TO_RADIANS,
                            zone.str() );
 
     // Handle potential user specified time offsets
@@ -1409,38 +1568,28 @@ int main( int argc, char **argv ) {
        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) - 
+    int offset = fgGetInt("/sim/startup/time-offset");
+    const string &offset_type = fgGetString("/sim/startup/time-offset-type");
+    if (offset_type == "system-offset") {
+       globals->set_warp( offset );
+    } else if (offset_type == "gmt-offset") {
+       globals->set_warp( offset - (currGMT - systemLocalTime) );
+    } else if (offset_type == "latitude-offset") {
+       globals->set_warp( offset - (aircraftLocalTime - systemLocalTime) );
+    } else if (offset_type == "system") {
+       globals->set_warp( offset - cur_time );
+    } else if (offset_type == "gmt") {
+       globals->set_warp( offset - currGMT );
+    } else if (offset_type == "latitude") {
+       globals->set_warp( offset - (aircraftLocalTime - systemLocalTime) - 
                           cur_time ); 
-       break;
-    default:
-       FG_LOG( FG_GENERAL, FG_ALERT, "Unsupported type" );
+    } else {
+        SG_LOG( SG_GENERAL, SG_ALERT,
+               "Unsupported offset type " << offset_type );
        exit( -1 );
     }
 
-    FG_LOG( FG_GENERAL, FG_INFO, "After time init, warp = " 
+    SG_LOG( SG_GENERAL, SG_INFO, "After time init, warp = " 
            << globals->get_warp() );
 
     globals->set_warp_delta( 0 );
@@ -1451,33 +1600,23 @@ int main( int argc, char **argv ) {
 
     // Do some quick general initializations
     if( !fgInitGeneral()) {
-       FG_LOG( FG_GENERAL, FG_ALERT, 
+       SG_LOG( SG_GENERAL, SG_ALERT, 
                "General initializations failed ..." );
        exit(-1);
     }
 
-    //
-    // some ssg test stuff (requires data from the plib source
-    // distribution) specifically from the ssg tux example
-    //
-
-    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" );
-  
+    SGPath modelpath( globals->get_fg_root() );
     ssgModelPath( (char *)modelpath.c_str() );
-    ssgTexturePath( (char *)texturepath.c_str() );
-
+  
     // Scene graph root
     scene = new ssgRoot;
     scene->setName( "Scene" );
 
+    lighting = new ssgRoot;
+    lighting->setName( "Lighting" );
+
     // Initialize the sky
-    FGPath ephem_data_path( globals->get_options()->get_fg_root() );
+    SGPath ephem_data_path( globals->get_fg_root() );
     ephem_data_path.append( "Astro" );
     SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
     ephem->update( globals->get_time_params()->getMjd(),
@@ -1485,10 +1624,11 @@ int main( int argc, char **argv ) {
                   0.0 );
     globals->set_ephem( ephem );
 
-    FGPath sky_tex_path( globals->get_options()->get_fg_root() );
+    thesky = new SGSky;
+
+    SGPath sky_tex_path( globals->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,
@@ -1497,15 +1637,15 @@ int main( int argc, char **argv ) {
                   globals->get_ephem()->getNumStars(),
                   globals->get_ephem()->getStars(), 60000.0 );
 
-    if ( globals->get_options()->get_clouds() == true ) {
+    if ( fgGetBool("/environment/clouds/status") ) {
+       // thesky->add_cloud_layer( 2000.0, 200.0, 50.0, 40000.0,
+        //                          SG_CLOUD_OVERCAST );
        thesky->add_cloud_layer( 2600.0, 200.0, 50.0, 40000.0,
-                                SG_CLOUD_MOSTLY_SUNNY );
+                                SG_CLOUD_MOSTLY_CLOUDY );
+       // thesky->add_cloud_layer( 3000.0, 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
@@ -1517,33 +1657,89 @@ int main( int argc, char **argv ) {
     terrain->setName( "Terrain" );
     scene->addKid( terrain );
 
+    // Lighting
+    ground = new ssgBranch;
+    ground->setName( "Ground Lighting" );
+    lighting->addKid( ground );
+
+    airport = new ssgBranch;
+    airport->setName( "Airport Lighting" );
+    lighting->addKid( airport );
+
     // temporary visible aircraft "own ship"
-    penguin_sel = new ssgSelector;
-    penguin_pos = new ssgTransform;
-    string tux_path =
-      current_properties.getStringValue("/sim/model/path",
-                                       "Models/Geometry/glider.ac");
-    ssgEntity *tux_obj = ssgLoad((char *)(tux_path.c_str()));
+    acmodel_selector = new ssgSelector;
+    acmodel_pos = new ssgTransform;
+
+    // Get the model location, and load textures from the same
+    // directory.  Use an absolute path for the model to avoid
+    // incompatibilities in different versions of PLIB.
+    string acmodel_path =
+       fgGetString("/sim/model/path", "Models/Geometry/glider.ac");
+    SGPath full_model = globals->get_fg_root();
+    full_model.append(acmodel_path);
+
+#if !defined( PLIB_1_2_X )
+    // this should be redundant ... but it breaks for relative paths
+    // ssgModelPath( (char *)full_model.dir().c_str() );
+#endif
+
+    ssgTexturePath( (char *)full_model.dir().c_str() );
+    ssgEntity *acmodel_obj = ssgLoad( (char *)full_model.c_str() );
+    if( !acmodel_obj ) {
+        // fall back to default
+        acmodel_obj = ssgLoad( (char *)"Models/Geometry/glider.ac" );
+        if( !acmodel_obj ) {
+            SG_LOG( SG_GENERAL, SG_ALERT, "FAILED to LOAD an AC model! ..." );
+            exit(-1);
+        }
+    }
+
+    // find moving parts (if this is an MDL model)
+    flaps_selector = (ssgSelector*)fgFindNode( acmodel_obj, "FLAPS" );
+    prop_selector  = (ssgSelector*)fgFindNode( acmodel_obj, "PROP"  );
+
+    acmodel_npropsettings = 0;
+    if (prop_selector != NULL) {
+      for (ssgEntity* kid = prop_selector->getKid(0); kid != NULL;
+          kid = prop_selector->getNextKid()) {
+       int prop_low, prop_high;
+       if ( sscanf(kid->getName(), "PROP_%d_%d", 
+                   &prop_low, &prop_high) == 2 ) {
+         prop_low  = (int)((float)prop_low  * (5000.0f / 32767.0f));
+         prop_high = (int)((float)prop_high * (5000.0f / 32767.0f));
+         acmodel_proprpms[acmodel_npropsettings][0] = prop_low ;
+         acmodel_proprpms[acmodel_npropsettings][1] = prop_high;
+         acmodel_npropsettings++;
+
+         SG_LOG( SG_GENERAL, SG_INFO, "PROPELLER SETTING " << prop_low <<
+                 " " << prop_high );
+       }
+      }
+    }
 
     // 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 );
+    ssgTransform *acmodel_align = new ssgTransform;
+    acmodel_align->addKid(acmodel_obj);
+    sgMat4 rot_matrix;
+    sgMat4 off_matrix;
+    sgMat4 res_matrix;
+    float h_rot = fgGetFloat("/sim/model/heading-offset-deg", 0.0);
+    float p_rot = fgGetFloat("/sim/model/roll-offset-deg", 0.0);
+    float r_rot = fgGetFloat("/sim/model/pitch-offset-deg", 0.0);
+    float x_off = fgGetFloat("/sim/model/x-offset-m", 0.0);
+    float y_off = fgGetFloat("/sim/model/y-offset-m", 0.0);
+    float z_off = fgGetFloat("/sim/model/z-offset-m", 0.0);
+    sgMakeRotMat4(rot_matrix, h_rot, p_rot, r_rot);
+    sgMakeTransMat4(off_matrix, x_off, y_off, z_off);
+    sgMultMat4(res_matrix, off_matrix, rot_matrix);
+    acmodel_align->setTransform(res_matrix);
+
+    acmodel_pos->addKid( acmodel_align );
+    acmodel_selector->addKid( acmodel_pos );
+    //ssgFlatten( acmodel_obj );
+    //ssgStripify( acmodel_selector );
+    acmodel_selector->clrTraversalMaskBits( SSGTRAV_HOT );
+    scene->addKid( acmodel_selector );
 
     // $$$ begin - added VS Renganthan 17 Oct 2K
     fgLoadDCS();
@@ -1551,7 +1747,7 @@ int main( int argc, char **argv ) {
 
 #ifdef FG_NETWORK_OLK
     // Do the network intialization
-    if ( globals->get_options()->get_network_olk() ) {
+    if ( fgGetBool("/sim/networking/network-olk") ) {
        printf("Multipilot mode %s\n", fg_net_init( scene ) );
     }
 #endif
@@ -1569,91 +1765,140 @@ int main( int argc, char **argv ) {
 
 
 // $$$ end - added VS Renganathan, 15 Oct 2K
+//         - added Venky         , 12 Nov 2K
+
+// Main entry point; catch any exceptions that have made it this far.
+int main ( int argc, char **argv ) {
+                               // FIXME: add other, more specific
+                               // exceptions.
+  try {
+    mainLoop(argc, argv);
+  } catch (sg_throwable &t) {
+    SG_LOG(SG_GENERAL, SG_ALERT,
+          "Fatal error: " << t.getFormattedMessage()
+          << "\n (received from " << t.getOrigin() << ')');
+    exit(1);
+  }
+}
+
+
 void fgLoadDCS(void) {
 
-    double obj_lat,obj_lon,obj_alt;
-    int i = 1;
-    string obj_filename;
+    ssgEntity *ship_obj = NULL;
+    // double bz[3];
+    // int j=0;
+    char obj_filename[25];
 
-    FGPath tile_path( globals->get_options()->get_fg_root());
+    for ( int k = 0; k < 32; k++ ) {
+        ship_pos[k]=NULL;
+    }
+
+    SGPath tile_path( globals->get_fg_root());
     tile_path.append( "Scenery" );
     tile_path.append( "Objects.txt" );
-    fg_gzifstream in( tile_path.str() );
+    sg_gzifstream in( tile_path.str() );
     if ( ! in.is_open() ) {
-       FG_LOG( FG_TERRAIN, FG_ALERT, "Cannot open file: " << tile_path.str() );
-    }
+       SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: " << tile_path.str() );
+    } else {
 
-    FGPath modelpath( globals->get_options()->get_fg_root() );
-    modelpath.append( "Models" );
-    modelpath.append( "Geometry" );
+        SGPath modelpath( globals->get_fg_root() );
+        modelpath.append( "Models" );
+        modelpath.append( "Geometry" );
   
-    FGPath texturepath( globals->get_options()->get_fg_root() );
-    texturepath.append( "Models" );
-    texturepath.append( "Textures" );
+        SGPath texturepath( globals->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" );
+        ssgModelPath( (char *)modelpath.c_str() );
+        ssgTexturePath( (char *)texturepath.c_str() );
+
+        ship_sel = new ssgSelector;
+
+        char c;
+        while ( ! in.eof() ) {
+            in >> ::skipws;
+            if ( in.get( c ) && c == '#' ) { 
+                in >> skipeol;
+            } else { 
+                in.putback(c);
+                in >> obj_filename >> obj_lat[objc] >> obj_lon[objc] >> obj_alt[objc];
+                /* cout << endl << obj_filename << " " << obj_lat[objc] << " " << obj_lon[objc] <<  " " << obj_alt[objc] << endl;
+                   int chj=getchar();*/
+                
+                obj_lon[objc] *=SGD_DEGREES_TO_RADIANS;
+                obj_lat[objc] *=SGD_DEGREES_TO_RADIANS;
+                
+                ship_pos[objc] = new ssgTransform;
+       
+                // type "repeat" in objects.txt to load one more
+                // instance of the last object.
+
+                if ( strcmp(obj_filename,"repeat") != 0) {
+                    ship_obj = ssgLoadOBJ( obj_filename );
+                }
+      
+                if ( ship_obj != NULL ) {
+                    ship_pos[objc]->addKid( ship_obj ); // add object to transform node
+                    ship_sel->addKid( ship_pos[objc] ); // add transform node to selector
+                } else {
+                    SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: "
+                            << obj_filename );
+                }
+            
+                objc++;
+
+                if (in.eof()) break;
+            }
+        } // while
+
+        SG_LOG ( SG_TERRAIN, SG_ALERT, "Finished object processing." );
+
+        ship_sel->clrTraversalMaskBits( SSGTRAV_HOT );
+        scene->addKid( ship_sel ); //add selector node to root node 
     }
 
-    //     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 eye_lat,eye_lon,eye_alt;
+    // static double obj_head;
     double sl_radius,obj_latgc;
-    float nresultmat[4][4];
-    sgMat4 Trans,rothead,rotlon,rot180,rotlat,resultmat1,resultmat2,resultmat3;
+    // 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);
+    FGADA *fdm = (FGADA *)current_aircraft.fdm_state;
+    
+    // Deck should be the first object in objects.txt in case of fdm=ada
+
+    if (fgGetString("/sim/flight-model") == "ada") {
+        obj_lon[0] = fdm->get_aux5()*SGD_DEGREES_TO_RADIANS;
+        obj_lat[0] = fdm->get_aux6()*SGD_DEGREES_TO_RADIANS;
+        obj_alt[0] = fdm->get_aux7();
+    }
+    
+    for ( int m = 0; m < objc; m++ ) {
+       //cout << endl <<  obj_lat[m]*SGD_RADIANS_TO_DEGREES << " " << obj_lon[m]*SGD_RADIANS_TO_DEGREES << " " << obj_alt[m] << " " << objc << endl;
+       //int v=getchar();
+
+        //Geodetic to Geocentric angles for rotation
+       sgGeodToGeoc(obj_lat[m],obj_alt[m],&sl_radius,&obj_latgc);
+
+        //moving object gbs-posn in cartesian coords
+        Point3D obj_posn = Point3D( obj_lon[m],obj_lat[m],obj_alt[m]);
+        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
        
        sgMat4 sgTRANS;
        sgMakeTransMat4( sgTRANS, bz[0],bz[1],bz[2]);
@@ -1664,8 +1909,8 @@ void fgUpdateDCS (void) {
        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_lon, obj_lon[m]*SGD_RADIANS_TO_DEGREES, ship_up );
+       sgMakeRotMat4( sgROT_lat, 90-obj_latgc*SGD_RADIANS_TO_DEGREES, ship_rt );
        sgMakeRotMat4( sgROT_hdg, 180.0, ship_up );
        
        sgMat4 sgTUX;
@@ -1675,9 +1920,13 @@ void fgUpdateDCS (void) {
        sgPostMultMat4( sgTUX, sgTRANS );
 
        sgCoord shippos;
-       sgSetCoord( &shippos, sgTUX );
-       ship_pos->setTransform( &shippos );
+       sgSetCoord(&shippos, sgTUX );
+       ship_pos[m]->setTransform( &shippos );
+    }
+    if ( ship_sel != NULL ) {
+       ship_sel->select(0xFFFFFFFF);
     }
 }
 
 // $$$ end - added VS Renganathan, 15 Oct 2K
+//           added Venky         , 12 Nov 2K