X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;ds=sidebyside;f=src%2FMain%2Fmain.cxx;h=d120c8f58d5d7ecf63f478416aa63d1d6a1aeffe;hb=45390e0655fffa45a16cba77fafdd9421ed7d6e2;hp=fe21913f8ad133966b943c48deb3b23b2edb93b6;hpb=26dca370280eff3dab0af3cb425dd2c2e94941bd;p=flightgear.git

diff --git a/src/Main/main.cxx b/src/Main/main.cxx
index fe21913f8..d120c8f58 100644
--- a/src/Main/main.cxx
+++ b/src/Main/main.cxx
@@ -25,17 +25,20 @@
 #  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>
@@ -53,19 +56,19 @@
 #  include <unistd.h>		// for stat()
 #endif
 
+// #ifdef HAVE_LIBX11
+// #  include <GL/glext.h>
+// #endif
+
+#include <plib/netChat.h>
 #include <plib/pu.h>
 #include <plib/ssg.h>
 
-#ifdef ENABLE_AUDIO_SUPPORT
-#  include <plib/sl.h>
-#  include <plib/sm.h>
-#endif
-
 #include <simgear/constants.h>  // for VERSION
 #include <simgear/debug/logstream.hxx>
 #include <simgear/math/polar3d.hxx>
 #include <simgear/math/sg_random.h>
-#include <simgear/misc/fgpath.hxx>
+#include <simgear/misc/sg_path.hxx>
 #include <simgear/sky/sky.hxx>
 #include <simgear/timing/sg_time.hxx>
 #include <simgear/timing/lowleveltime.h>
@@ -81,21 +84,29 @@
 
 #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>
 
+#include <Input/input.hxx>
+
 // begin - added Venky
 //    $$$ begin - added VS Renganathan
-#include <simgear/misc/fgstream.hxx>
+#include <simgear/misc/sgstream.hxx>
 #include <FDM/flight.hxx>
 #include <FDM/ADA.hxx>
 void fgLoadDCS (void);
@@ -116,12 +127,12 @@ int objc=0;
 
 #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"
 
 #ifdef macintosh
 #  include <console.h>		// -dw- for command line dialog
@@ -135,7 +146,7 @@ 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;
@@ -145,12 +156,8 @@ 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
 
 
@@ -309,10 +316,83 @@ 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;
@@ -339,7 +419,7 @@ 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));
@@ -356,10 +436,10 @@ void fgRenderFrame( void ) {
 	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 );
+				       SG_FEET_TO_METER );
 	pilot_view->set_sea_level_radius( cur_fdm_state->
 					  get_Sea_level_radius() *
-					  FEET_TO_METER ); 
+					  SG_FEET_TO_METER ); 
 	pilot_view->set_rph( cur_fdm_state->get_Phi(),
 			     cur_fdm_state->get_Theta(),
 			     cur_fdm_state->get_Psi() );
@@ -369,24 +449,25 @@ void fgRenderFrame( void ) {
 
 	sgVec3 po;		// chase view pilot_offset
 	sgVec3 wup;		// chase view world up
-	sgSetVec3( po, 0.0, 0.0, 50.0 );
+	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() * RAD_TO_DEG -
-		       cur_fdm_state->get_Psi() * RAD_TO_DEG,
+		       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
-	sgXformVec3( po, po, pilot_view->get_UP() );
+        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() *
-				       FEET_TO_METER );
+				       SG_FEET_TO_METER );
 	chase_view->set_sea_level_radius( cur_fdm_state->
 					  get_Sea_level_radius() *
-					  FEET_TO_METER );
+					  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 );
@@ -479,8 +560,7 @@ 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 * 
 			      fgGetInt("/sim/speed-up") ) /
 			    (double)fgGetInt("/sim/model-hz") );
@@ -494,7 +574,7 @@ void fgRenderFrame( void ) {
 	    // cout << "----> updating fog params" << endl;
 		
 	    // 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;
@@ -547,7 +627,7 @@ void fgRenderFrame( void ) {
 				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(),
@@ -559,42 +639,41 @@ void fgRenderFrame( void ) {
 	}
 
 	glEnable( GL_DEPTH_TEST );
-	if ( fgGetString("/sim/rendering/fog") != "disabled" ) {
+	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_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 ) {
@@ -639,14 +718,15 @@ void fgRenderFrame( void ) {
 
 	    // set up moving parts
 	    if (flaps_selector != NULL) {
-	      flaps_selector->select( (controls.get_flaps() > 0.5f) ? 1 : 2 );
+		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 (FGBFI::getRPM() >= acmodel_proprpms[i][0] &&
-		    FGBFI::getRPM() <= acmodel_proprpms[i][1]) {
+		if (rpm >= acmodel_proprpms[i][0] &&
+		    rpm <= acmodel_proprpms[i][1]) {
 		  propsel_mask |= 1 << i;
 		}
 	      }
@@ -682,8 +762,17 @@ void fgRenderFrame( void ) {
 	// position tile nodes and update range selectors
 	global_tile_mgr.prep_ssg_nodes();
 
-	// draw the sky backdrop
-	thesky->preDraw();
+	if ( fgGetBool("/sim/rendering/skyblend") ) {
+	    // draw the sky backdrop
+
+            // 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 );
@@ -697,8 +786,10 @@ void fgRenderFrame( void ) {
 
 	ssgCullAndDraw( lighting );
 
-	// draw the sky cloud layers
-	thesky->postDraw( cur_fdm_state->get_Altitude() * FEET_TO_METER );
+	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 );
@@ -706,8 +797,11 @@ void fgRenderFrame( void ) {
 	// glDisable( GL_CULL_FACE );
 	// glDisable( GL_TEXTURE_2D );
 
+	// update the input subsystem
+	current_input.update();
+
 	// update the controls subsystem
-	controls.update();
+	globals->get_controls()->update();
 
 	hud_and_panel->apply();
 	fgCockpitUpdate();
@@ -731,12 +825,21 @@ void fgRenderFrame( void ) {
 
 // Update internal time dependent calculations (i.e. flight model)
 void fgUpdateTimeDepCalcs() {
+    static bool inited = false;
+
     fgLIGHT *l = &cur_light_params;
     int i;
 
-    int multi_loop = 1;
+    long multi_loop = 1;
 
     if ( !globals->get_freeze() && !initial_freeze ) {
+	// 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();
@@ -744,29 +847,37 @@ void fgUpdateTimeDepCalcs() {
 	elapsed += cur_fdm_state->get_remainder();
 	// cout << "elapsed = " << elapsed << endl;
 	// cout << "dt = " << cur_fdm_state->get_delta_t() << endl;
-	multi_loop = (int)(((double)elapsed * 0.000001) /
+	multi_loop = (long)(((double)elapsed * 0.000001) /
 			       cur_fdm_state->get_delta_t() );
 	cur_fdm_state->set_multi_loop( multi_loop );
-	long remainder = elapsed - ( (multi_loop*1000000) *
+	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; ++i ) {
+	for ( i = 0; i < multi_loop * fgGetInt("/sim/speed-up"); ++i ) {
 	    // run Autopilot system
 	    current_autopilot->run();
 
-	    // update autopiot
-	    cur_fdm_state->update( 1 * fgGetInt("/sim/speed-up") );
+	    // update autopilot
+	    cur_fdm_state->update( 1 );
 	}
 	FGSteam::update( multi_loop * fgGetInt("/sim/speed-up") );
     } else {
 	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;
-	}
+	    //}
     }
 
     if ( fgGetString("/sim/view-mode") == "pilot" ) {
@@ -785,38 +896,38 @@ void fgUpdateTimeDepCalcs() {
 	    // current_view.goal_view_offset
 	    if ( v->get_goal_view_offset() > v->get_view_offset() )
             {
-		if ( v->get_goal_view_offset() - v->get_view_offset() < FG_PI ){
+		if ( v->get_goal_view_offset() - v->get_view_offset() < SGD_PI ){
 		    v->inc_view_offset( 0.01 );
 		} else {
 		    v->inc_view_offset( -0.01 );
 		}
 	    } else {
-		if ( v->get_view_offset() - v->get_goal_view_offset() < FG_PI ){
+		if ( v->get_view_offset() - v->get_goal_view_offset() < SGD_PI ){
 		    v->inc_view_offset( -0.01 );
 		} else {
 		    v->inc_view_offset( 0.01 );
 		}
 	    }
-	    if ( v->get_view_offset() > FG_2PI ) {
-		v->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( FG_2PI );
+		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
@@ -840,7 +951,7 @@ void fgInitTimeDepCalcs( void ) {
 
 
 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
@@ -858,8 +969,8 @@ 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 ( fgGetBool("/sim/networking/network-olk") ) {
@@ -873,10 +984,10 @@ static void fgMainLoop( void ) {
 
 #if defined( ENABLE_PLIB_JOYSTICK )
     // Read joystick and update control settings
-    if ( fgGetString("/sim/control-mode") == "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
@@ -892,31 +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( 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" );
 	}
     }
 
     /* 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 ) {
@@ -934,12 +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 );
 
@@ -965,7 +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;
     }
@@ -978,19 +1091,26 @@ static void fgMainLoop( void ) {
     // Calculate model iterations needed for next frame
     elapsed += remainder;
 
-    global_multi_loop = (int)(((double)elapsed * 0.000001) * 
+    global_multi_loop = (long)(((double)elapsed * 0.000001) * 
 			      fgGetInt("/sim/model-hz"));
     remainder = elapsed - ( (global_multi_loop*1000000) / 
 			    fgGetInt("/sim/model-hz") );
-    FG_LOG( FG_ALL, FG_DEBUG, 
+    SG_LOG( SG_ALL, SG_DEBUG, 
 	    "Model iterations needed = " << global_multi_loop
 	    << ", new remainder = " << remainder );
 	
+    // 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 {
-	FG_LOG( FG_ALL, FG_DEBUG, 
+	SG_LOG( SG_ALL, SG_DEBUG, 
 		"Elapsed time is zero ... we're zinging" );
     }
 
@@ -1000,20 +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 ( fgGetBool("/sim/sound") && !audio_sched->not_working() ) {
-
+    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;
@@ -1029,41 +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, "" );
 }
 
 
@@ -1086,20 +1213,42 @@ static void fgIdleFunction ( void ) {
 	
 	idle_state++;
     } else if ( idle_state == 1 ) {
+	// Initialize audio support
+#ifdef ENABLE_AUDIO_SUPPORT
+
 	// Start the intro music
 #if !defined(WIN32)
 	if ( fgGetBool("/sim/startup/intro-music") ) {
-	    string lockfile = "/tmp/mpg123.running";
-	    FGPath mp3file( globals->get_fg_root() );
+	    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++;
@@ -1120,7 +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);
 	}
@@ -1135,64 +1284,6 @@ static void fgIdleFunction ( void ) {
 
 	idle_state++;
     } else if ( idle_state == 6 ) {
-	// Initialize audio support
-#ifdef ENABLE_AUDIO_SUPPORT
-
-#if !defined(WIN32)
-	if ( fgGetBool("/sim/startup/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 ( fgGetBool("/sim/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_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;
 
@@ -1263,7 +1354,7 @@ 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: " <<
+    SG_LOG( SG_GENERAL, SG_INFO, "Opening a window: " <<
 	    fgGetInt("/sim/startup/xsize") << "x"
 	    << fgGetInt("/sim/startup/ysize") );
 
@@ -1284,7 +1375,7 @@ int fgGlutInit( int *argc, char **argv ) {
 		 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();
@@ -1297,16 +1388,16 @@ 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 ) );
-    FG_LOG( FG_GENERAL, FG_INFO, general.get_glRenderer() );
+    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, "Max texture size = " << tmp );
+    SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
 
     glGetIntegerv( GL_DEPTH_BITS, &tmp );
     general.set_glDepthBits( tmp );
-    FG_LOG ( FG_GENERAL, FG_INFO, "Depth buffer bits = " << tmp );
+    SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
 
     return 1;
 }
@@ -1318,8 +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 );
@@ -1337,8 +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 );
@@ -1351,7 +1444,7 @@ int main( int argc, char **argv ) {
 #endif
 
     // set default log levels
-    fglog().setLogLevels( FG_ALL, FG_INFO );
+    sglog().setLogLevels( SG_ALL, SG_INFO );
 
     string version;
 #ifdef FLIGHTGEAR_VERSION
@@ -1359,15 +1452,13 @@ int main( int argc, char **argv ) {
 #else
     version = "unknown version";
 #endif
-    FG_LOG( FG_GENERAL, FG_INFO, "FlightGear:  Version "
+    SG_LOG( SG_GENERAL, SG_INFO, "FlightGear:  Version "
 	    << version << endl );
 
     // Allocate global data structures.  This needs to happen before
     // we parse command line options
 
-    SGPropertyNode *props = new SGPropertyNode;
     globals = new FGGlobals;
-    globals->set_props( props );
 
     // seed the random number generater
     sg_srandom_time();
@@ -1375,6 +1466,9 @@ int main( int argc, char **argv ) {
     SGRoute *route = new SGRoute;
     globals->set_route( route );
 
+    FGControls *controls = new FGControls;
+    globals->set_controls( controls );
+
     FGViewMgr *viewmgr = new FGViewMgr;
     globals->set_viewmgr( viewmgr );
 
@@ -1384,6 +1478,9 @@ int main( int argc, char **argv ) {
     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 ) );
 
@@ -1391,28 +1488,40 @@ int main( int argc, char **argv ) {
     // fg_root was specified (ignore all other options for now)
     fgInitFGRoot(argc, argv);
 
+    // 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);
+    }
+
     // 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();
@@ -1422,19 +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 = " << 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") );
+				     fgGetDouble("/orientation/heading-deg") );
     }
 
     // Initialize time
-    FGPath zone( globals->get_fg_root() );
+    SGPath zone( globals->get_fg_root() );
     zone.append( "Timezone" );
-    SGTime *t = new SGTime( fgGetDouble("/position/longitude") * DEG_TO_RAD,
-			    fgGetDouble("/position/latitude") * 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
@@ -1461,12 +1584,12 @@ int main( int argc, char **argv ) {
 	globals->set_warp( offset - (aircraftLocalTime - systemLocalTime) - 
 			   cur_time ); 
     } else {
-        FG_LOG( FG_GENERAL, FG_ALERT,
+        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 );
@@ -1477,12 +1600,12 @@ 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);
     }
 
-    FGPath modelpath( globals->get_fg_root() );
+    SGPath modelpath( globals->get_fg_root() );
     ssgModelPath( (char *)modelpath.c_str() );
   
     // Scene graph root
@@ -1493,7 +1616,7 @@ int main( int argc, char **argv ) {
     lighting->setName( "Lighting" );
 
     // Initialize the sky
-    FGPath ephem_data_path( globals->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(),
@@ -1501,10 +1624,11 @@ int main( int argc, char **argv ) {
 		   0.0 );
     globals->set_ephem( ephem );
 
-    FGPath sky_tex_path( globals->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,
@@ -1514,14 +1638,14 @@ int main( int argc, char **argv ) {
 		   globals->get_ephem()->getStars(), 60000.0 );
 
     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
@@ -1546,18 +1670,29 @@ int main( int argc, char **argv ) {
     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);
 
-    string full_model = globals->get_fg_root() + "/"
-	+ acmodel_path;
-    int pos = full_model.rfind("/");
-    
-    FGPath texturepath( full_model.substr(0, pos) );
-    cout << "Texture path = " << texturepath.str() << endl;
-    ssgTexturePath( (char *)texturepath.c_str() );
+#if !defined( PLIB_1_2_X )
+    // this should be redundant ... but it breaks for relative paths
+    // ssgModelPath( (char *)full_model.dir().c_str() );
+#endif
 
-    ssgEntity *acmodel_obj = ssgLoad((char *)(acmodel_path.c_str()));
+    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" );
@@ -1576,7 +1711,7 @@ int main( int argc, char **argv ) {
 	  acmodel_proprpms[acmodel_npropsettings][1] = prop_high;
 	  acmodel_npropsettings++;
 
-	  FG_LOG( FG_GENERAL, FG_INFO, "PROPELLER SETTING " << prop_low <<
+	  SG_LOG( SG_GENERAL, SG_INFO, "PROPELLER SETTING " << prop_low <<
 		  " " << prop_high );
 	}
       }
@@ -1588,12 +1723,12 @@ int main( int argc, char **argv ) {
     sgMat4 rot_matrix;
     sgMat4 off_matrix;
     sgMat4 res_matrix;
-    float h_rot = fgGetFloat("/sim/model/h-rotation", 0.0);
-    float p_rot = fgGetFloat("/sim/model/p-rotation", 0.0);
-    float r_rot = fgGetFloat("/sim/model/r-rotation", 0.0);
-    float x_off = fgGetFloat("/sim/model/x-offset", 0.0);
-    float y_off = fgGetFloat("/sim/model/y-offset", 0.0);
-    float z_off = fgGetFloat("/sim/model/z-offset", 0.0);
+    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);
@@ -1632,6 +1767,21 @@ 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) {
 
     ssgEntity *ship_obj = NULL;
@@ -1639,73 +1789,74 @@ void fgLoadDCS(void) {
     // int j=0;
     char obj_filename[25];
 
-    for (int k=0;k<32;k++)
-    {
+    for ( int k = 0; k < 32; k++ ) {
         ship_pos[k]=NULL;
     }
 
-    FGPath tile_path( globals->get_fg_root());
+    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_fg_root() );
-    modelpath.append( "Models" );
-    modelpath.append( "Geometry" );
+        SGPath modelpath( globals->get_fg_root() );
+        modelpath.append( "Models" );
+        modelpath.append( "Geometry" );
   
-    FGPath texturepath( globals->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() );
-
-    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();*/
+        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] *=DEG_TO_RAD;
-      	obj_lat[objc] *=DEG_TO_RAD;
-    
-            ship_pos[objc] = new ssgTransform;
-       
+                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.
+                // 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 ( 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
-       		FG_LOG( FG_TERRAIN, FG_ALERT, "Cannot open file: " << 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 );
+                }
             
-      	if (in.eof()) break;
-            objc++;
-         }
-     } // while
+                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 
+    }
 
-    ship_sel->clrTraversalMaskBits( SSGTRAV_HOT );
-    scene->addKid( ship_sel ); //add selector node to root node
     return;
  }
 
@@ -1724,16 +1875,14 @@ void fgUpdateDCS (void) {
     
     // 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()*DEG_TO_RAD;
-      obj_lat[0] = fdm->get_aux6()*DEG_TO_RAD;
-      obj_alt[0] = fdm->get_aux7();
+    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]*RAD_TO_DEG << " " << obj_lon[m]*RAD_TO_DEG << " " << obj_alt[m] << " " << objc << endl;
+    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
@@ -1760,8 +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[m]*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;
@@ -1774,9 +1923,10 @@ void fgUpdateDCS (void) {
 	sgSetCoord(&shippos, sgTUX );
 	ship_pos[m]->setTransform( &shippos );
     }
-   if ( ship_sel != NULL ) 
+    if ( ship_sel != NULL ) {
 	ship_sel->select(0xFFFFFFFF);
-  }
+    }
+}
 
 // $$$ end - added VS Renganathan, 15 Oct 2K
 //           added Venky         , 12 Nov 2K