src/Main/main.cxx

   1 // main.cxx -- top level sim routines
   2 //
   3 // Written by Curtis Olson for OpenGL, started May 1997.
   4 //
   5 // Copyright (C) 1997 - 1999  Curtis L. Olson  - curt@flightgear.org
   6 //
   7 // This program is free software; you can redistribute it and/or
   8 // modify it under the terms of the GNU General Public License as
   9 // published by the Free Software Foundation; either version 2 of the
  10 // License, or (at your option) any later version.
  11 //
  12 // This program is distributed in the hope that it will be useful, but
  13 // WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 // General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License
  18 // along with this program; if not, write to the Free Software
  19 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 //
  21 // $Id$
  22
  23
  24 #ifdef HAVE_CONFIG_H
  25 #  include <config.h>
  26 #endif
  27
  28 #if defined(__linux__) && defined(__i386__)
  29 #  include <fpu_control.h>
  30 #  include <signal.h>
  31 #endif
  32
  33 #include <simgear/compiler.h>
  34 #include <simgear/misc/exception.hxx>
  35
  36 #ifdef SG_MATH_EXCEPTION_CLASH
  37 #  include <math.h>
  38 #endif
  39
  40 #ifdef HAVE_WINDOWS_H
  41 #  include <windows.h>
  42 #  include <float.h>
  43 #endif
  44
  45 #include <GL/glut.h>
  46 #include <GL/gl.h>
  47
  48 #include <stdio.h>
  49 #include <string.h>
  50 #include <string>
  51
  52 #ifdef HAVE_STDLIB_H
  53 #   include <stdlib.h>
  54 #endif
  55
  56 #ifdef HAVE_SYS_STAT_H
  57 #  include <sys/stat.h>         // for stat()
  58 #endif
  59
  60 #ifdef HAVE_UNISTD_H
  61 #  include <unistd.h>           // for stat()
  62 #endif
  63
  64 #include <plib/netChat.h>
  65 #include <plib/pu.h>
  66 #include <plib/ssg.h>
  67
  68 #include <simgear/constants.h>  // for VERSION
  69 #include <simgear/debug/logstream.hxx>
  70 #include <simgear/math/polar3d.hxx>
  71 #include <simgear/math/sg_random.h>
  72 #include <simgear/misc/sg_path.hxx>
  73 #include <simgear/sky/sky.hxx>
  74 #include <simgear/timing/sg_time.hxx>
  75
  76 #include <Include/general.hxx>
  77
  78 #include <Aircraft/aircraft.hxx>
  79
  80 #include <ATC/ATCmgr.hxx>
  81 #include <ATC/ATCdisplay.hxx>
  82 #include <Autopilot/newauto.hxx>
  83
  84 #include <Cockpit/cockpit.hxx>
  85 #include <Cockpit/radiostack.hxx>
  86 #include <Cockpit/steam.hxx>
  87
  88 #include <FDM/UIUCModel/uiuc_aircraftdir.h>
  89 #include <GUI/gui.h>
  90 // #include <Joystick/joystick.hxx>
  91 #ifdef FG_NETWORK_OLK
  92 #include <NetworkOLK/network.h>
  93 #endif
  94 #include <Objects/matlib.hxx>
  95 #include <Scenery/scenery.hxx>
  96 #include <Scenery/tilemgr.hxx>
  97 #ifdef ENABLE_AUDIO_SUPPORT
  98 #  include <Sound/soundmgr.hxx>
  99 #  include <Sound/fg_fx.hxx>
 100 #  include <Sound/morse.hxx>
 101 #endif
 102 #include <Time/event.hxx>
 103 #include <Time/fg_timer.hxx>
 104 #include <Time/light.hxx>
 105 #include <Time/sunpos.hxx>
 106 #include <Time/tmp.hxx>
 107
 108 #include <Input/input.hxx>
 109
 110 // ADA
 111 #include <simgear/misc/sgstream.hxx>
 112 #include <simgear/math/point3d.hxx>
 113 #include <FDM/flight.hxx>
 114 #include <FDM/ADA.hxx>
 115 #include <Scenery/tileentry.hxx>
 116
 117 // Should already be inlcluded by gl.h if needed by your platform so
 118 // we shouldn't include this here.
 119 // #include <GL/glext.h>
 120 #if !defined(sgi)
 121 // PFNGLPOINTPARAMETERFEXTPROC glPointParameterfEXT = 0;
 122 // PFNGLPOINTPARAMETERFVEXTPROC glPointParameterfvEXT = 0;
 123 #endif
 124 float default_attenuation[3] = {1.0, 0.0, 0.0};
 125 //Required for using GL_extensions
 126 void fgLoadDCS (void);
 127 void fgUpdateDCS (void);
 128 ssgSelector *ship_sel=NULL;
 129 // upto 32 instances of a same object can be loaded.
 130 ssgTransform *ship_pos[32];
 131 double obj_lat[32],obj_lon[32],obj_alt[32],obj_pitch[32],obj_roll[32];
 132 int objc=0;
 133 ssgSelector *lightpoints_brightness = new ssgSelector;
 134 ssgTransform *lightpoints_transform = new ssgTransform;
 135 FGTileEntry *dummy_tile;
 136 sgVec3 rway_ols;
 137 // ADA
 138
 139 #ifndef FG_NEW_ENVIRONMENT
 140 #  include <WeatherCM/FGLocalWeatherDatabase.h>
 141 #else
 142 #  include <Environment/environment_mgr.hxx>
 143 #endif
 144
 145 #include "version.h"
 146
 147 #include "fg_init.hxx"
 148 #include "fg_io.hxx"
 149 #include "fg_props.hxx"
 150 #include "globals.hxx"
 151 #include "splash.hxx"
 152 #include "viewmgr.hxx"
 153 #include "options.hxx"
 154 #include "logger.hxx"
 155 #include "model.hxx"
 156
 157 #ifdef macintosh
 158 #  include <console.h>          // -dw- for command line dialog
 159 #endif
 160
 161
 162 // This is a record containing a bit of global housekeeping information
 163 FGGeneral general;
 164
 165 // Specify our current idle function state.  This is used to run all
 166 // our initializations out of the glutIdleLoop() so that we can get a
 167 // splash screen up and running right away.
 168 static int idle_state = 0;
 169 static long global_multi_loop;
 170
 171 // forward declaration
 172 void fgReshape( int width, int height );
 173
 174 // ssg variables
 175 ssgRoot *scene = NULL;
 176 ssgBranch *terrain_branch = NULL;
 177 ssgBranch *gnd_lights_branch = NULL;
 178 ssgBranch *rwy_lights_branch = NULL;
 179
 180 // fog constants.  I'm a little nervous about putting actual code out
 181 // here but it seems to work (?)
 182 static const double m_log01 = -log( 0.01 );
 183 static const double sqrt_m_log01 = sqrt( m_log01 );
 184 static GLfloat fog_exp_density;
 185 static GLfloat fog_exp2_density;
 186 static GLfloat fog_exp2_punch_through;
 187
 188 ssgRoot *lighting = NULL;
 189 // ssgBranch *airport = NULL;
 190
 191 #ifdef FG_NETWORK_OLK
 192 ssgSelector *fgd_sel = NULL;
 193 ssgTransform *fgd_pos = NULL;
 194 #endif
 195
 196 // current fdm/position used for view
 197 FGInterface cur_view_fdm;
 198
 199 // Sky structures
 200 SGSky *thesky;
 201
 202 // hack
 203 sgMat4 copy_of_ssgOpenGLAxisSwapMatrix =
 204 {
 205   {  1.0f,  0.0f,  0.0f,  0.0f },
 206   {  0.0f,  0.0f, -1.0f,  0.0f },
 207   {  0.0f,  1.0f,  0.0f,  0.0f },
 208   {  0.0f,  0.0f,  0.0f,  1.0f }
 209 };
 210
 211 // The following defines flightgear options. Because glutlib will also
 212 // want to parse its own options, those options must not be included here
 213 // or they will get parsed by the main program option parser. Hence case
 214 // is significant for any option added that might be in conflict with
 215 // glutlib's parser.
 216 //
 217 // glutlib parses for:
 218 //    -display
 219 //    -direct   (invalid in Win32)
 220 //    -geometry
 221 //    -gldebug
 222 //    -iconized
 223 //    -indirect (invalid in Win32)
 224 //    -synce
 225 //
 226 // Note that glutlib depends upon strings while this program's
 227 // option parser wants only initial characters followed by numbers
 228 // or pathnames.
 229 //
 230
 231
 232 ssgSimpleState *default_state;
 233 ssgSimpleState *hud_and_panel;
 234 ssgSimpleState *menus;
 235
 236 SGTimeStamp start_time_stamp;
 237 SGTimeStamp current_time_stamp;
 238
 239 void fgBuildRenderStates( void ) {
 240     default_state = new ssgSimpleState;
 241     default_state->ref();
 242     default_state->disable( GL_TEXTURE_2D );
 243     default_state->enable( GL_CULL_FACE );
 244     default_state->enable( GL_COLOR_MATERIAL );
 245     default_state->setColourMaterial( GL_AMBIENT_AND_DIFFUSE );
 246     default_state->setMaterial( GL_EMISSION, 0, 0, 0, 1 );
 247     default_state->setMaterial( GL_SPECULAR, 0, 0, 0, 1 );
 248     default_state->disable( GL_BLEND );
 249     default_state->disable( GL_ALPHA_TEST );
 250     default_state->disable( GL_LIGHTING );
 251
 252     hud_and_panel = new ssgSimpleState;
 253     hud_and_panel->ref();
 254     hud_and_panel->disable( GL_CULL_FACE );
 255     hud_and_panel->disable( GL_TEXTURE_2D );
 256     hud_and_panel->disable( GL_LIGHTING );
 257     hud_and_panel->enable( GL_BLEND );
 258
 259     menus = new ssgSimpleState;
 260     menus->ref();
 261     menus->disable( GL_CULL_FACE );
 262     menus->disable( GL_TEXTURE_2D );
 263     menus->enable( GL_BLEND );
 264 }
 265
 266 // fgFindNode -- a function that finds a named node in an ssg graph
 267 ssgEntity *fgFindNode( ssgEntity *node, const char *name ) {
 268     if ( node->getName() != NULL && strcmp( name, node->getName() ) == 0 ) {
 269         return node;
 270     } else if ( node->isAKindOf(ssgTypeBranch()) ) {
 271         ssgEntity *kid = ((ssgBranch*)node)->getKid(0);
 272         while ( kid != NULL ) {
 273             ssgEntity *n = fgFindNode(kid, name);
 274             if ( n != NULL ) {
 275                 return n;
 276             }
 277             kid = ((ssgBranch*)node)->getNextKid();
 278         }
 279     }
 280
 281     return NULL;
 282 }
 283
 284 // fgInitVisuals() -- Initialize various GL/view parameters
 285 void fgInitVisuals( void ) {
 286     fgLIGHT *l;
 287
 288     l = &cur_light_params;
 289
 290 #ifndef GLUT_WRONG_VERSION
 291     // Go full screen if requested ...
 292     if ( fgGetBool("/sim/startup/fullscreen") ) {
 293         glutFullScreen();
 294     }
 295 #endif
 296
 297     // If enabled, normal vectors specified with glNormal are scaled
 298     // to unit length after transformation.  See glNormal.
 299     // glEnable( GL_NORMALIZE );
 300
 301     glEnable( GL_LIGHTING );
 302     glEnable( GL_LIGHT0 );
 303     glLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
 304
 305     sgVec3 sunpos;
 306     sgSetVec3( sunpos, l->sun_vec[0], l->sun_vec[1], l->sun_vec[2] );
 307     ssgGetLight( 0 ) -> setPosition( sunpos );
 308
 309     // glFogi (GL_FOG_MODE, GL_LINEAR);
 310     glFogi (GL_FOG_MODE, GL_EXP2);
 311     if ( (fgGetString("/sim/rendering/fog") == "disabled") ||
 312          (!fgGetBool("/sim/rendering/shading"))) {
 313         // if fastest fog requested, or if flat shading force fastest
 314         glHint ( GL_FOG_HINT, GL_FASTEST );
 315     } else if ( fgGetString("/sim/rendering/fog") == "nicest" ) {
 316         glHint ( GL_FOG_HINT, GL_NICEST );
 317     }
 318     if ( fgGetBool("/sim/rendering/wireframe") ) {
 319         // draw wire frame
 320         glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
 321     }
 322
 323     // This is the default anyways, but it can't hurt
 324     glFrontFace ( GL_CCW );
 325
 326     // Just testing ...
 327     // glEnable(GL_POINT_SMOOTH);
 328     // glEnable(GL_LINE_SMOOTH);
 329     // glEnable(GL_POLYGON_SMOOTH);
 330 }
 331
 332
 333 // For HiRes screen Dumps using Brian Pauls TR Library
 334 void trRenderFrame( void ) {
 335
 336     if ( fgPanelVisible() ) {
 337         GLfloat height = fgGetInt("/sim/startup/ysize");
 338         GLfloat view_h =
 339             (current_panel->getViewHeight() - current_panel->getYOffset())
 340             * (height / 768.0) + 1;
 341         glTranslatef( 0.0, view_h, 0.0 );
 342     }
 343
 344     static GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
 345     static GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
 346
 347     fgLIGHT *l = &cur_light_params;
 348
 349     glClearColor(l->adj_fog_color[0], l->adj_fog_color[1],
 350                  l->adj_fog_color[2], l->adj_fog_color[3]);
 351
 352     glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
 353
 354     // set the opengl state to known default values
 355     default_state->force();
 356
 357     glEnable( GL_FOG );
 358     glFogf  ( GL_FOG_DENSITY, fog_exp2_density);
 359     glFogi  ( GL_FOG_MODE,    GL_EXP2 );
 360     glFogfv ( GL_FOG_COLOR,   l->adj_fog_color );
 361
 362     // GL_LIGHT_MODEL_AMBIENT has a default non-zero value so if
 363     // we only update GL_AMBIENT for our lights we will never get
 364     // a completely dark scene.  So, we set GL_LIGHT_MODEL_AMBIENT
 365     // explicitely to black.
 366     glLightModelfv( GL_LIGHT_MODEL_AMBIENT, black );
 367
 368     ssgGetLight( 0 ) -> setColour( GL_AMBIENT, l->scene_ambient );
 369
 370     // texture parameters
 371     glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
 372     glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
 373
 374     // we need a white diffuse light for the phase of the moon
 375     ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, white );
 376     thesky->preDraw();
 377
 378     // draw the ssg scene
 379     // return to the desired diffuse color
 380     ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
 381     glEnable( GL_DEPTH_TEST );
 382     ssgCullAndDraw( scene );
 383
 384     // draw the lights
 385     glFogf (GL_FOG_DENSITY, fog_exp2_punch_through);
 386     ssgCullAndDraw( lighting );
 387
 388     thesky->postDraw( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER );
 389
 390     // need to do this here as hud_and_panel state is static to
 391     // main.cxx  and HUD and Panel routines have to be called with
 392     // knowledge of the the TR struct < see gui.cxx::HighResDump()
 393     hud_and_panel->apply();
 394 }
 395
 396
 397 // Update all Visuals (redraws anything graphics related)
 398 void fgRenderFrame( void ) {
 399     static const SGPropertyNode *longitude
 400         = fgGetNode("/position/longitude-deg");
 401     static const SGPropertyNode *latitude
 402         = fgGetNode("/position/latitude-deg");
 403     static const SGPropertyNode *altitude
 404         = fgGetNode("/position/altitude-ft");
 405
 406     // Update the default (kludged) properties.
 407     fgUpdateProps();
 408
 409     fgLIGHT *l = &cur_light_params;
 410     static double last_visibility = -9999;
 411
 412     // update fog params
 413     double actual_visibility       = thesky->get_visibility();
 414     if ( actual_visibility != last_visibility ) {
 415         last_visibility = actual_visibility;
 416
 417         fog_exp_density = m_log01 / actual_visibility;
 418         fog_exp2_density = sqrt_m_log01 / actual_visibility;
 419         fog_exp2_punch_through = sqrt_m_log01 / ( actual_visibility * 4.0 );
 420     }
 421
 422     // double angle;
 423     // GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
 424     // GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
 425     // GLfloat terrain_color[4] = { 0.54, 0.44, 0.29, 1.0 };
 426     // GLfloat mat_shininess[] = { 10.0 };
 427     GLbitfield clear_mask;
 428
 429     if ( idle_state != 1000 ) {
 430         // still initializing, draw the splash screen
 431         if ( fgGetBool("/sim/startup/splash-screen") ) {
 432             fgSplashUpdate(0.0);
 433         }
 434         start_time_stamp.stamp(); // Keep resetting the start time
 435     } else {
 436         // idle_state is now 1000 meaning we've finished all our
 437         // initializations and are running the main loop, so this will
 438         // now work without seg faulting the system.
 439
 440                                 // Update the elapsed time.
 441         current_time_stamp.stamp();
 442         globals->set_elapsed_time_ms((current_time_stamp - start_time_stamp)
 443                                      / 1000L);
 444
 445         // calculate our current position in cartesian space
 446         scenery.set_center( scenery.get_next_center() );
 447
 448         // update view port
 449         fgReshape( fgGetInt("/sim/startup/xsize"),
 450                    fgGetInt("/sim/startup/ysize") );
 451
 452         // set the sun position
 453         glLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
 454
 455         clear_mask = GL_DEPTH_BUFFER_BIT;
 456         if ( fgGetBool("/sim/rendering/wireframe") ) {
 457             clear_mask |= GL_COLOR_BUFFER_BIT;
 458         }
 459
 460         if ( fgGetBool("/sim/rendering/skyblend") ) {
 461             if ( fgGetBool("/sim/rendering/textures") ) {
 462                 // glClearColor(black[0], black[1], black[2], black[3]);
 463                 glClearColor(l->adj_fog_color[0], l->adj_fog_color[1],
 464                              l->adj_fog_color[2], l->adj_fog_color[3]);
 465                 clear_mask |= GL_COLOR_BUFFER_BIT;
 466             }
 467         } else {
 468             glClearColor(l->sky_color[0], l->sky_color[1],
 469                          l->sky_color[2], l->sky_color[3]);
 470             clear_mask |= GL_COLOR_BUFFER_BIT;
 471         }
 472         glClear( clear_mask );
 473
 474         // Tell GL we are switching to model view parameters
 475
 476         // I really should create a derived ssg node or use a call
 477         // back or something so that I can draw the sky within the
 478         // ssgCullAndDraw() function, but for now I just mimic what
 479         // ssg does to set up the model view matrix
 480         glMatrixMode(GL_MODELVIEW);
 481         glLoadIdentity();
 482         ssgSetCamera( (sgVec4 *)globals->get_current_view()->get_VIEW() );
 483
 484         // set the opengl state to known default values
 485         default_state->force();
 486
 487         // update fog params if visibility has changed
 488         thesky->set_visibility(fgGetDouble("/environment/visibility-m"));
 489
 490         thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 491                             ( global_multi_loop * fgGetInt("/sim/speed-up") )
 492                             / (double)fgGetInt("/sim/model-hz") );
 493
 494         // Set correct opengl fog density
 495         glFogf (GL_FOG_DENSITY, fog_exp2_density);
 496
 497         // update the sky dome
 498         if ( fgGetBool("/sim/rendering/skyblend") ) {
 499             /* cout << "thesky->repaint() sky_color = "
 500                  << cur_light_params.sky_color[0] << " "
 501                  << cur_light_params.sky_color[1] << " "
 502                  << cur_light_params.sky_color[2] << " "
 503                  << cur_light_params.sky_color[3] << endl;
 504             cout << "    fog = "
 505                  << cur_light_params.fog_color[0] << " "
 506                  << cur_light_params.fog_color[1] << " "
 507                  << cur_light_params.fog_color[2] << " "
 508                  << cur_light_params.fog_color[3] << endl;
 509             cout << "    sun_angle = " << cur_light_params.sun_angle
 510                  << "    moon_angle = " << cur_light_params.moon_angle
 511                  << endl; */
 512             thesky->repaint( cur_light_params.sky_color,
 513                              cur_light_params.adj_fog_color,
 514                              cur_light_params.sun_angle,
 515                              cur_light_params.moon_angle,
 516                              globals->get_ephem()->getNumPlanets(),
 517                              globals->get_ephem()->getPlanets(),
 518                              globals->get_ephem()->getNumStars(),
 519                              globals->get_ephem()->getStars() );
 520
 521             /* cout << "thesky->reposition( view_pos = " << view_pos[0] << " "
 522                  << view_pos[1] << " " << view_pos[2] << endl;
 523             cout << "    zero_elev = " << zero_elev[0] << " "
 524                  << zero_elev[1] << " " << zero_elev[2]
 525                  << " lon = " << cur_fdm_state->get_Longitude()
 526                  << " lat = " << cur_fdm_state->get_Latitude() << endl;
 527             cout << "    sun_rot = " << cur_light_params.sun_rotation
 528                  << " gst = " << SGTime::cur_time_params->getGst() << endl;
 529             cout << "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 530                  << " sun dec = " << globals->get_ephem()->getSunDeclination()
 531                  << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 532                  << " moon dec = " << globals->get_ephem()->getMoonDeclination() << endl; */
 533
 534             thesky->reposition( globals->get_current_view()->get_view_pos(),
 535                                 globals->get_current_view()->get_zero_elev(),
 536                                 globals->get_current_view()->get_world_up(),
 537                                 longitude->getDoubleValue()
 538                                   * SGD_DEGREES_TO_RADIANS,
 539                                 latitude->getDoubleValue()
 540                                   * SGD_DEGREES_TO_RADIANS,
 541                                 altitude->getDoubleValue() * SG_FEET_TO_METER,
 542                                 cur_light_params.sun_rotation,
 543                                 globals->get_time_params()->getGst(),
 544                                 globals->get_ephem()->getSunRightAscension(),
 545                                 globals->get_ephem()->getSunDeclination(),
 546                                 50000.0,
 547                                 globals->get_ephem()->getMoonRightAscension(),
 548                                 globals->get_ephem()->getMoonDeclination(),
 549                                 50000.0 );
 550         }
 551
 552         glEnable( GL_DEPTH_TEST );
 553         if ( fgGetString("/sim/rendering/fog") != (string)"disabled" ) {
 554             glEnable( GL_FOG );
 555             glFogi( GL_FOG_MODE, GL_EXP2 );
 556             glFogfv( GL_FOG_COLOR, l->adj_fog_color );
 557         }
 558
 559         // set sun/lighting parameters
 560         ssgGetLight( 0 ) -> setPosition( l->sun_vec );
 561
 562         // GL_LIGHT_MODEL_AMBIENT has a default non-zero value so if
 563         // we only update GL_AMBIENT for our lights we will never get
 564         // a completely dark scene.  So, we set GL_LIGHT_MODEL_AMBIENT
 565         // explicitely to black.
 566         GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
 567         GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
 568         glLightModelfv( GL_LIGHT_MODEL_AMBIENT, black );
 569
 570         ssgGetLight( 0 ) -> setColour( GL_AMBIENT, l->scene_ambient );
 571         ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
 572         // ssgGetLight( 0 ) -> setColour( GL_SPECULAR, l->scene_white );
 573
 574         // texture parameters
 575         // glEnable( GL_TEXTURE_2D );
 576         glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
 577         glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
 578
 579         // glMatrixMode( GL_PROJECTION );
 580         // glLoadIdentity();
 581         ssgSetFOV( globals->get_current_view()->get_h_fov(),
 582                    globals->get_current_view()->get_v_fov() );
 583
 584         double agl = current_aircraft.fdm_state->get_Altitude() * SG_FEET_TO_METER
 585             - scenery.get_cur_elev();
 586
 587         if (fgGetBool("/cockpit"))
 588           ssgSetNearFar( 0.2f, 120000.0f );
 589         else if ( agl > 10.0)
 590             ssgSetNearFar( 10.0f, 120000.0f );
 591         else
 592             ssgSetNearFar( 0.5f, 120000.0f );
 593
 594         current_model.update(0); // FIXME: use real delta time
 595
 596         // $$$ begin - added VS Renganthan 17 Oct 2K
 597         fgUpdateDCS();
 598         // $$$ end - added VS Renganthan 17 Oct 2K
 599
 600 # ifdef FG_NETWORK_OLK
 601         if ( fgGetBool("/sim/networking/network-olk") ) {
 602             sgCoord fgdpos;
 603             other = head->next;             /* put listpointer to start  */
 604             while ( other != tail) {        /* display all except myself */
 605                 if ( strcmp( other->ipadr, fgd_mcp_ip) != 0) {
 606                     other->fgd_sel->select(1);
 607                     sgSetCoord( &fgdpos, other->sgFGD_COORD );
 608                     other->fgd_pos->setTransform( &fgdpos );
 609                 }
 610                 other = other->next;
 611             }
 612
 613             // fgd_sel->select(1);
 614             // sgCopyMat4( sgTUX, current_view.sgVIEW);
 615             // sgCoord fgdpos;
 616             // sgSetCoord( &fgdpos, sgFGD_VIEW );
 617             // fgd_pos->setTransform( &fgdpos);
 618         }
 619 # endif
 620
 621         // position tile nodes and update range selectors
 622         global_tile_mgr.prep_ssg_nodes();
 623
 624         if ( fgGetBool("/sim/rendering/skyblend") ) {
 625             // draw the sky backdrop
 626
 627             // we need a white diffuse light for the phase of the moon
 628             ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, white );
 629
 630             thesky->preDraw();
 631
 632             // return to the desired diffuse color
 633             ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
 634         }
 635
 636         // draw the ssg scene
 637         glEnable( GL_DEPTH_TEST );
 638         ssgCullAndDraw( scene );
 639
 640         // change state for lighting here
 641
 642         // draw lighting
 643         // Set punch through fog density
 644         glFogf (GL_FOG_DENSITY, fog_exp2_punch_through);
 645
 646 #ifdef FG_EXPERIMENTAL_LIGHTING
 647         // Enable states for drawing points with GL_extension
 648         if (glutExtensionSupported("GL_EXT_point_parameters")) {
 649             glEnable(GL_POINT_SMOOTH);
 650             float quadratic[3] = {1.0, 0.01, 0.0001};
 651             // get the address of our OpenGL extensions
 652 #if !defined(sgi)
 653             glPointParameterfEXT = (PFNGLPOINTPARAMETERFEXTPROC)
 654                 wglGetProcAddress("glPointParameterfEXT");
 655             glPointParameterfvEXT = (PFNGLPOINTPARAMETERFVEXTPROC)
 656                 wglGetProcAddress("glPointParameterfvEXT");
 657 #endif
 658             // makes the points fade as they move away
 659             glPointParameterfvEXT(GL_DISTANCE_ATTENUATION_EXT, quadratic);
 660             glPointParameterfEXT(GL_POINT_SIZE_MIN_EXT, 1.0);
 661             glPointSize(4.0);
 662
 663             // Enable states for drawing runway lights with spherical mapping
 664             glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
 665             glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
 666             glEnable(GL_TEXTURE_GEN_S);
 667             glEnable(GL_TEXTURE_GEN_T);
 668
 669             //Maybe this is not the best way, but it works !!
 670             glPolygonMode(GL_FRONT, GL_POINT);
 671             glCullFace(GL_BACK);
 672             glEnable(GL_CULL_FACE);
 673         }
 674
 675         glDisable( GL_LIGHTING );
 676         // blending function for runway lights
 677         glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) ;
 678         glEnable(GL_BLEND);
 679 #endif
 680
 681         ssgCullAndDraw( lighting );
 682
 683 #ifdef FG_EXPERIMENTAL_LIGHTING
 684         if (glutExtensionSupported("GL_EXT_point_parameters")) {
 685             // Disable states used for runway lighting
 686             glPolygonMode(GL_FRONT, GL_FILL);
 687
 688             glDisable(GL_TEXTURE_GEN_S);
 689             glDisable(GL_TEXTURE_GEN_T);
 690             glPointParameterfvEXT(GL_DISTANCE_ATTENUATION_EXT,
 691                                   default_attenuation);
 692         }
 693
 694         glPointSize(1.0);
 695 #endif
 696
 697         if ( fgGetBool("/sim/rendering/skyblend") ) {
 698             // draw the sky cloud layers
 699             thesky->postDraw( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER );
 700         }
 701
 702         // display HUD && Panel
 703         glDisable( GL_FOG );
 704         glDisable( GL_DEPTH_TEST );
 705         // glDisable( GL_CULL_FACE );
 706         // glDisable( GL_TEXTURE_2D );
 707
 708         // update the input subsystem
 709         current_input.update(1); // FIXME: use real dt
 710
 711         // update the controls subsystem
 712         globals->get_controls()->update(1); // FIXME: use real dt
 713
 714         hud_and_panel->apply();
 715         fgCockpitUpdate();
 716
 717         // Use the hud_and_panel ssgSimpleState for rendering the ATC output
 718         // This only works properly if called before the panel call
 719         globals->get_ATC_display()->update(1);  // FIXME: use real dt
 720
 721         // update the panel subsystem
 722         if ( current_panel != NULL ) {
 723             current_panel->update(1); // FIXME: use real dt
 724         }
 725
 726         // We can do translucent menus, so why not. :-)
 727         menus->apply();
 728         glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
 729         puDisplay();
 730         // glDisable ( GL_BLEND ) ;
 731
 732         // glEnable( GL_FOG );
 733
 734         globals->get_logger()->update(0); // FIXME: use real dt
 735     }
 736
 737     glutSwapBuffers();
 738 }
 739
 740
 741 // Update internal time dependent calculations (i.e. flight model)
 742 void fgUpdateTimeDepCalcs() {
 743     static bool inited = false;
 744     static const SGPropertyNode *master_freeze
 745         = fgGetNode("/sim/freeze/master");
 746
 747     //SG_LOG(SG_FLIGHT,SG_INFO, "Updating time dep calcs()");
 748
 749     fgLIGHT *l = &cur_light_params;
 750     int i;
 751
 752     long multi_loop = 1;
 753
 754     // Initialize the FDM here if it hasn't been and if we have a
 755     // scenery elevation hit.
 756
 757     // cout << "cur_fdm_state->get_inited() = " << cur_fdm_state->get_inited()
 758     //      << " cur_elev = " << scenery.get_cur_elev() << endl;
 759
 760     if ( !cur_fdm_state->get_inited() && scenery.get_cur_elev() > -9990 ) {
 761   SG_LOG(SG_FLIGHT,SG_INFO, "Finally initializing fdm");
 762
 763         cur_fdm_state->init();
 764         if ( cur_fdm_state->get_bound() ) {
 765             cur_fdm_state->unbind();
 766         }
 767         cur_fdm_state->bind();
 768     }
 769
 770     // conceptually, the following block could be done for each fdm
 771     // instance ...
 772     if ( !cur_fdm_state->get_inited() ) {
 773         // do nothing, fdm isn't inited yet
 774     } else if ( master_freeze->getBoolValue() ) {
 775         // we are frozen, run the fdm's with 0 time slices in case
 776         // they want to do something with that.
 777
 778         cur_fdm_state->update( 0 );
 779         FGSteam::update( 0 );
 780     } else {
 781         // we have been inited, and we are not frozen, we are good to go ...
 782
 783         if ( !inited ) {
 784             cur_fdm_state->stamp();
 785             inited = true;
 786         }
 787
 788         SGTimeStamp current;
 789         current.stamp();
 790         long elapsed = current - cur_fdm_state->get_time_stamp();
 791         cur_fdm_state->set_time_stamp( current );
 792         elapsed += cur_fdm_state->get_remainder();
 793         // cout << "elapsed = " << elapsed << endl;
 794         // cout << "dt = " << cur_fdm_state->get_delta_t() << endl;
 795         multi_loop = (long)(((double)elapsed * 0.000001) /
 796                                cur_fdm_state->get_delta_t() );
 797         cur_fdm_state->set_multi_loop( multi_loop );
 798         long remainder = elapsed - (long)( (multi_loop*1000000) *
 799                                      cur_fdm_state->get_delta_t() );
 800         cur_fdm_state->set_remainder( remainder );
 801         // cout << "remainder = " << remainder << endl;
 802
 803         // chop max interations to something reasonable if the sim was
 804         // delayed for an excesive amount of time
 805         if ( multi_loop > 2.0 / cur_fdm_state->get_delta_t() ) {
 806             multi_loop = (int)(2.0 / cur_fdm_state->get_delta_t());
 807             cur_fdm_state->set_remainder( 0 );
 808         }
 809
 810         // cout << "multi_loop = " << multi_loop << endl;
 811         for ( i = 0; i < multi_loop * fgGetInt("/sim/speed-up"); ++i ) {
 812             // run Autopilot system
 813             globals->get_autopilot()->update(0); // FIXME: use real dt
 814
 815             // update FDM
 816             cur_fdm_state->update( 1 );
 817         }
 818         FGSteam::update( multi_loop * fgGetInt("/sim/speed-up") );
 819     }
 820
 821     if ( fgGetString("/sim/view-mode") == "pilot" ) {
 822         cur_view_fdm = *cur_fdm_state;
 823         // do nothing
 824     }
 825
 826     // update the view angle
 827     globals->get_viewmgr()->update(multi_loop);
 828
 829     l->UpdateAdjFog();
 830
 831     // Update solar system
 832     globals->get_ephem()->update( globals->get_time_params()->getMjd(),
 833                                   globals->get_time_params()->getLst(),
 834                                   cur_fdm_state->get_Latitude() );
 835
 836     // Update radio stack model
 837     current_radiostack->update(multi_loop);
 838 }
 839
 840
 841 void fgInitTimeDepCalcs( void ) {
 842     // initialize timer
 843
 844     // #ifdef HAVE_SETITIMER
 845     //   fgTimerInit( 1.0 / fgGetInt("/sim/model-hz"),
 846     //                fgUpdateTimeDepCalcs );
 847     // #endif HAVE_SETITIMER
 848 }
 849
 850
 851 static const double alt_adjust_ft = 3.758099;
 852 static const double alt_adjust_m = alt_adjust_ft * SG_FEET_TO_METER;
 853
 854
 855 // What should we do when we have nothing else to do?  Let's get ready
 856 // for the next move and update the display?
 857 static void fgMainLoop( void ) {
 858     static const SGPropertyNode *longitude
 859         = fgGetNode("/position/longitude-deg");
 860     static const SGPropertyNode *latitude
 861         = fgGetNode("/position/latitude-deg");
 862     static const SGPropertyNode *altitude
 863         = fgGetNode("/position/altitude-ft");
 864     static const SGPropertyNode *clock_freeze
 865         = fgGetNode("/sim/freeze/clock", true);
 866     static const SGPropertyNode *cur_time_override
 867         = fgGetNode("/sim/time/cur-time-override", true);
 868
 869     static long remainder = 0;
 870     long elapsed;
 871 #ifdef FANCY_FRAME_COUNTER
 872     int i;
 873     double accum;
 874 #else
 875     static time_t last_time = 0;
 876     static int frames = 0;
 877 #endif // FANCY_FRAME_COUNTER
 878
 879     SGTime *t = globals->get_time_params();
 880
 881     SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
 882     SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
 883
 884 #ifdef FG_NETWORK_OLK
 885     if ( fgGetBool("/sim/networking/network-olk") ) {
 886         if ( net_is_registered == 0 ) {      // We first have to reg. to fgd
 887             // printf("FGD: Netupdate\n");
 888             fgd_send_com( "A", FGFS_host);   // Send Mat4 data
 889             fgd_send_com( "B", FGFS_host);   // Recv Mat4 data
 890         }
 891     }
 892 #endif
 893
 894 #if defined( ENABLE_PLIB_JOYSTICK )
 895     // Read joystick and update control settings
 896     // if ( fgGetString("/sim/control-mode") == "joystick" )
 897     // {
 898     //    fgJoystickRead();
 899     // }
 900 #elif defined( ENABLE_GLUT_JOYSTICK )
 901     // Glut joystick support works by feeding a joystick handler
 902     // function to glut.  This is taken care of once in the joystick
 903     // init routine and we don't have to worry about it again.
 904 #endif
 905
 906 #ifdef FG_NEW_ENVIRONMENT
 907     globals->get_environment_mgr()->update(0);  // FIXME: use real delta time
 908 #endif
 909
 910     // Fix elevation.  I'm just sticking this here for now, it should
 911     // probably move eventually
 912
 913     /* printf("Before - ground = %.2f  runway = %.2f  alt = %.2f\n",
 914            scenery.get_cur_elev(),
 915            cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
 916            cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
 917
 918     if ( scenery.get_cur_elev() > -9990 && cur_fdm_state->get_inited() ) {
 919         if ( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER <
 920              (scenery.get_cur_elev() + alt_adjust_m - 3.0) ) {
 921             // now set aircraft altitude above ground
 922             printf("(*) Current Altitude = %.2f < %.2f forcing to %.2f\n",
 923                    cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 924                    scenery.get_cur_elev() + alt_adjust_m - 3.0,
 925                    scenery.get_cur_elev() + alt_adjust_m );
 926             cur_fdm_state->set_Altitude( scenery.get_cur_elev()
 927                                                 + alt_adjust_m );
 928
 929             SG_LOG( SG_ALL, SG_DEBUG,
 930                     "<*> resetting altitude to "
 931                     << cur_fdm_state->get_Altitude() * SG_FEET_TO_METER
 932                     << " meters" );
 933         }
 934     }
 935
 936     /* printf("Adjustment - ground = %.2f  runway = %.2f  alt = %.2f\n",
 937            scenery.get_cur_elev(),
 938            cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
 939            cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
 940
 941     // cout << "Warp = " << globals->get_warp() << endl;
 942
 943     // update "time"
 944     static bool last_clock_freeze = false;
 945
 946     if ( clock_freeze->getBoolValue() ) {
 947         // clock freeze requested
 948         if ( cur_time_override->getLongValue() == 0 ) {
 949             fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
 950             globals->set_warp( 0 );
 951         }
 952     } else {
 953         // no clock freeze requested
 954         if ( last_clock_freeze == true ) {
 955             // clock just unfroze, let's set warp as the difference
 956             // between frozen time and current time so we don't get a
 957             // time jump (and corresponding sky object and lighting
 958             // jump.)
 959             globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
 960             fgSetLong( "/sim/time/cur-time-override", 0 );
 961         }
 962         if ( globals->get_warp_delta() != 0 ) {
 963             globals->inc_warp( globals->get_warp_delta() );
 964         }
 965     }
 966
 967     last_clock_freeze = clock_freeze->getBoolValue();
 968
 969     t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
 970                latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
 971                cur_time_override->getLongValue(),
 972                globals->get_warp() );
 973
 974     if ( globals->get_warp_delta() != 0 ) {
 975         fgUpdateSkyAndLightingParams();
 976     }
 977
 978     // update magvar model
 979     globals->get_mag()->update( longitude->getDoubleValue()
 980                                   * SGD_DEGREES_TO_RADIANS,
 981                                 latitude->getDoubleValue()
 982                                   * SGD_DEGREES_TO_RADIANS,
 983                                 altitude->getDoubleValue() * SG_FEET_TO_METER,
 984                                 globals->get_time_params()->getJD() );
 985
 986     // Get elapsed time (in usec) for this past frame
 987     elapsed = fgGetTimeInterval();
 988     SG_LOG( SG_ALL, SG_DEBUG,
 989             "Elapsed time interval is = " << elapsed
 990             << ", previous remainder is = " << remainder );
 991
 992     // Calculate frame rate average
 993 #ifdef FANCY_FRAME_COUNTER
 994     /* old fps calculation */
 995     if ( elapsed > 0 ) {
 996         double tmp;
 997         accum = 0.0;
 998         for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
 999             tmp = general.get_frame(i);
1000             accum += tmp;
1001             // printf("frame[%d] = %.2f\n", i, g->frames[i]);
1002             general.set_frame(i+1,tmp);
1003         }
1004         tmp = 1000000.0 / (float)elapsed;
1005         general.set_frame(0,tmp);
1006         // printf("frame[0] = %.2f\n", general.frames[0]);
1007         accum += tmp;
1008         general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
1009         // printf("ave = %.2f\n", general.frame_rate);
1010     }
1011 #else
1012     if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
1013         general.set_frame_rate( frames );
1014         SG_LOG( SG_ALL, SG_DEBUG,
1015                 "--> Frame rate is = " << general.get_frame_rate() );
1016         frames = 0;
1017     }
1018     last_time = t->get_cur_time();
1019     ++frames;
1020 #endif
1021
1022     // Run ATC subsystem
1023     globals->get_ATC_mgr()->update(1);  // FIXME: use real dt
1024
1025     // Run flight model
1026
1027     // Calculate model iterations needed for next frame
1028     elapsed += remainder;
1029
1030     global_multi_loop = (long)(((double)elapsed * 0.000001) *
1031                               fgGetInt("/sim/model-hz"));
1032     remainder = elapsed - ( (global_multi_loop*1000000) /
1033                             fgGetInt("/sim/model-hz") );
1034     SG_LOG( SG_ALL, SG_DEBUG,
1035             "Model iterations needed = " << global_multi_loop
1036             << ", new remainder = " << remainder );
1037
1038     // chop max interations to something reasonable if the sim was
1039     // delayed for an excesive amount of time
1040     if ( global_multi_loop > 2.0 * fgGetInt("/sim/model-hz") ) {
1041         global_multi_loop = (int)(2.0 * fgGetInt("/sim/model-hz") );
1042         remainder = 0;
1043     }
1044
1045     // flight model
1046     if ( global_multi_loop > 0 ) {
1047         fgUpdateTimeDepCalcs();
1048     } else {
1049         SG_LOG( SG_ALL, SG_DEBUG,
1050                 "Elapsed time is zero ... we're zinging" );
1051     }
1052
1053 #if ! defined( macintosh )
1054     // Do any I/O channel work that might need to be done
1055     fgIOProcess();
1056 #endif
1057
1058     // see if we need to load any new scenery tiles
1059     global_tile_mgr.update( longitude->getDoubleValue(),
1060                             latitude->getDoubleValue() );
1061
1062     // see if we need to load any deferred-load textures
1063     material_lib.load_next_deferred();
1064
1065     // Process/manage pending events
1066     global_events.Process();
1067
1068     // Run audio scheduler
1069 #ifdef ENABLE_AUDIO_SUPPORT
1070     if ( fgGetBool("/sim/sound/audible")
1071            && globals->get_soundmgr()->is_working() ) {
1072         globals->get_fx()->update(1); // FIXME: use dt
1073         globals->get_soundmgr()->update(1); // FIXME: use dt
1074     }
1075 #endif
1076
1077     // redraw display
1078     fgRenderFrame();
1079
1080     SG_LOG( SG_ALL, SG_DEBUG, "" );
1081 }
1082
1083
1084 // This is the top level master main function that is registered as
1085 // our idle funciton
1086 //
1087
1088 // The first few passes take care of initialization things (a couple
1089 // per pass) and once everything has been initialized fgMainLoop from
1090 // then on.
1091
1092 static void fgIdleFunction ( void ) {
1093     // printf("idle state == %d\n", idle_state);
1094
1095     if ( idle_state == 0 ) {
1096         // Initialize the splash screen right away
1097         if ( fgGetBool("/sim/startup/splash-screen") ) {
1098             fgSplashInit();
1099         }
1100
1101         idle_state++;
1102     } else if ( idle_state == 1 ) {
1103         // Initialize audio support
1104 #ifdef ENABLE_AUDIO_SUPPORT
1105
1106         // Start the intro music
1107         if ( fgGetBool("/sim/startup/intro-music") ) {
1108             SGPath mp3file( globals->get_fg_root() );
1109             mp3file.append( "Sounds/intro.mp3" );
1110
1111             SG_LOG( SG_GENERAL, SG_INFO,
1112                     "Starting intro music: " << mp3file.str() );
1113
1114 #if defined( __CYGWIN__ )
1115             string command = "start /m `cygpath -w " + mp3file.str() + "`";
1116 #elif defined( WIN32 )
1117             string command = "start /m " + mp3file.str();
1118 #else
1119             string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
1120 #endif
1121
1122             system ( command.c_str() );
1123         }
1124
1125 #endif
1126
1127         idle_state++;
1128     } else if ( idle_state == 2 ) {
1129         // These are a few miscellaneous things that aren't really
1130         // "subsystems" but still need to be initialized.
1131
1132 #ifdef USE_GLIDE
1133         if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
1134             grTexLodBiasValue ( GR_TMU0, 1.0 ) ;
1135         }
1136 #endif
1137
1138         idle_state++;
1139     } else if ( idle_state == 3 ) {
1140         // This is the top level init routine which calls all the
1141         // other subsystem initialization routines.  If you are adding
1142         // a subsystem to flightgear, its initialization call should
1143         // located in this routine.
1144         if( !fgInitSubsystems()) {
1145             SG_LOG( SG_GENERAL, SG_ALERT,
1146                     "Subsystem initializations failed ..." );
1147             exit(-1);
1148         }
1149
1150         idle_state++;
1151     } else if ( idle_state == 4 ) {
1152         // setup OpenGL view parameters
1153         fgInitVisuals();
1154
1155         idle_state++;
1156     } else if ( idle_state == 5 ) {
1157
1158         idle_state++;
1159     } else if ( idle_state == 6 ) {
1160         // sleep(1);
1161         idle_state = 1000;
1162
1163         cout << "Panel visible = " << fgPanelVisible() << endl;
1164         fgReshape( fgGetInt("/sim/startup/xsize"),
1165                    fgGetInt("/sim/startup/ysize") );
1166     }
1167
1168     if ( idle_state == 1000 ) {
1169         // We've finished all our initialization steps, from now on we
1170         // run the main loop.
1171
1172         fgMainLoop();
1173     } else {
1174         if ( fgGetBool("/sim/startup/splash-screen") ) {
1175             fgSplashUpdate(0.0);
1176         }
1177     }
1178 }
1179
1180 // options.cxx needs to see this for toggle_panel()
1181 // Handle new window size or exposure
1182 void fgReshape( int width, int height ) {
1183     int view_h;
1184
1185     if ( (!fgGetBool("/sim/virtual-cockpit"))
1186          && fgPanelVisible() && idle_state == 1000 ) {
1187         view_h = (int)(height * (current_panel->getViewHeight() -
1188                                  current_panel->getYOffset()) / 768.0);
1189     } else {
1190         view_h = height;
1191     }
1192
1193     // for all views
1194     for ( int i = 0; i < globals->get_viewmgr()->size(); ++i ) {
1195         globals->get_viewmgr()->get_view(i)->
1196             set_aspect_ratio((float)view_h / (float)width);
1197     }
1198
1199     glViewport( 0, (GLint)(height - view_h), (GLint)(width), (GLint)(view_h) );
1200
1201     fgSetInt("/sim/startup/xsize", width);
1202     fgSetInt("/sim/startup/ysize", height);
1203     guiInitMouse(width, height);
1204
1205     ssgSetFOV( globals->get_current_view()->get_h_fov(),
1206                globals->get_current_view()->get_v_fov() );
1207
1208     fgHUDReshape();
1209 }
1210
1211
1212 // Initialize GLUT and define a main window
1213 int fgGlutInit( int *argc, char **argv ) {
1214
1215 #if !defined( macintosh )
1216     // GLUT will extract all glut specific options so later on we only
1217     // need wory about our own.
1218     glutInit(argc, argv);
1219 #endif
1220
1221     // Define Display Parameters
1222     glutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
1223
1224     SG_LOG( SG_GENERAL, SG_INFO, "Opening a window: " <<
1225             fgGetInt("/sim/startup/xsize") << "x"
1226             << fgGetInt("/sim/startup/ysize") );
1227
1228     // Define initial window size
1229     glutInitWindowSize( fgGetInt("/sim/startup/xsize"),
1230                         fgGetInt("/sim/startup/ysize") );
1231
1232     // Initialize windows
1233     if ( !fgGetBool("/sim/startup/game-mode")) {
1234         // Open the regular window
1235         glutCreateWindow("FlightGear");
1236 #ifndef GLUT_WRONG_VERSION
1237     } else {
1238         // Open the cool new 'game mode' window
1239         char game_mode_str[256];
1240         sprintf( game_mode_str, "width=%d height=%d bpp=%d",
1241                  fgGetInt("/sim/startup/xsize"),
1242                  fgGetInt("/sim/startup/ysize"),
1243                  fgGetInt("/sim/rendering/bits-per-pixel"));
1244
1245         SG_LOG( SG_GENERAL, SG_INFO,
1246                 "game mode params = " << game_mode_str );
1247         glutGameModeString( game_mode_str );
1248         glutEnterGameMode();
1249 #endif
1250     }
1251
1252     // This seems to be the absolute earliest in the init sequence
1253     // that these calls will return valid info.  Too bad it's after
1254     // we've already created and sized out window. :-(
1255     general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
1256     general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
1257     general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
1258     SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
1259
1260     GLint tmp;
1261     glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
1262     general.set_glMaxTexSize( tmp );
1263     SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
1264
1265     glGetIntegerv( GL_DEPTH_BITS, &tmp );
1266     general.set_glDepthBits( tmp );
1267     SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
1268
1269     return 1;
1270 }
1271
1272
1273 // Initialize GLUT event handlers
1274 int fgGlutInitEvents( void ) {
1275     // call fgReshape() on window resizes
1276     glutReshapeFunc( fgReshape );
1277
1278     // call GLUTkey() on keyboard event
1279     glutKeyboardFunc(GLUTkey);
1280     glutKeyboardUpFunc(GLUTkeyup);
1281     glutSpecialFunc(GLUTspecialkey);
1282     glutSpecialUpFunc(GLUTspecialkeyup);
1283
1284     // call guiMouseFunc() whenever our little rodent is used
1285     glutMouseFunc ( guiMouseFunc );
1286     glutMotionFunc (guiMotionFunc );
1287     glutPassiveMotionFunc (guiMotionFunc );
1288
1289     // call fgMainLoop() whenever there is
1290     // nothing else to do
1291     glutIdleFunc( fgIdleFunction );
1292
1293     // draw the scene
1294     glutDisplayFunc( fgRenderFrame );
1295
1296     return 1;
1297 }
1298
1299
1300 // Main loop
1301 int mainLoop( int argc, char **argv ) {
1302
1303 #if defined( macintosh )
1304     freopen ("stdout.txt", "w", stdout );
1305     freopen ("stderr.txt", "w", stderr );
1306     argc = ccommand( &argv );
1307 #endif
1308
1309     // set default log levels
1310     sglog().setLogLevels( SG_ALL, SG_INFO );
1311
1312     string version;
1313 #ifdef FLIGHTGEAR_VERSION
1314     version = FLIGHTGEAR_VERSION;
1315 #else
1316     version = "unknown version";
1317 #endif
1318     SG_LOG( SG_GENERAL, SG_INFO, "FlightGear:  Version "
1319             << version << endl );
1320
1321     // Allocate global data structures.  This needs to happen before
1322     // we parse command line options
1323
1324     globals = new FGGlobals;
1325
1326 #if defined(FG_NEW_ENVIRONMENT)
1327     globals->set_environment_mgr(new FGEnvironmentMgr);
1328 #endif
1329
1330     // seed the random number generater
1331     sg_srandom_time();
1332
1333     SGRoute *route = new SGRoute;
1334     globals->set_route( route );
1335
1336     FGControls *controls = new FGControls;
1337     globals->set_controls( controls );
1338
1339     FGViewMgr *viewmgr = new FGViewMgr;
1340     globals->set_viewmgr( viewmgr );
1341     viewmgr->init();
1342     viewmgr->bind();
1343
1344     string_list *col = new string_list;
1345     globals->set_channel_options_list( col );
1346
1347     // Scan the config file(s) and command line options to see if
1348     // fg_root was specified (ignore all other options for now)
1349     fgInitFGRoot(argc, argv);
1350
1351     // Check for the correct base package version
1352     string base_version = fgBasePackageVersion();
1353     if ( !(base_version == "0.7.9") ) {
1354         // tell the operator how to use this application
1355         fgUsage();
1356
1357         SG_LOG( SG_GENERAL, SG_ALERT, "Base package check failed ... "
1358                 << "Found version " << base_version );
1359         SG_LOG( SG_GENERAL, SG_ALERT, "Please upgrade to version 0.7.9" );
1360         exit(-1);
1361     }
1362
1363     // Initialize the Aircraft directory to "" (UIUC)
1364     aircraft_dir = "";
1365
1366     // Load the configuration parameters
1367     if ( !fgInitConfig(argc, argv) ) {
1368         SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
1369         exit(-1);
1370     }
1371
1372     // Initialize the Window/Graphics environment.
1373     if( !fgGlutInit(&argc, argv) ) {
1374         SG_LOG( SG_GENERAL, SG_ALERT, "GLUT initialization failed ..." );
1375         exit(-1);
1376     }
1377
1378     // Initialize the various GLUT Event Handlers.
1379     if( !fgGlutInitEvents() ) {
1380         SG_LOG( SG_GENERAL, SG_ALERT,
1381                 "GLUT event handler initialization failed ..." );
1382         exit(-1);
1383     }
1384
1385     // Initialize plib net interface
1386     netInit( &argc, argv );
1387
1388     // Initialize ssg (from plib).  Needs to come before we do any
1389     // other ssg stuff, but after opengl/glut has been initialized.
1390     ssgInit();
1391
1392     // Initialize the user interface (we need to do this before
1393     // passing off control to glut and before fgInitGeneral to get our
1394     // fonts !!!
1395     guiInit();
1396
1397 #ifdef GL_EXT_texture_lod_bias
1398     glTexEnvf( GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, -0.5 ) ;
1399 #endif
1400
1401     // Set position relative to glide slope if requested
1402     fgSetPosFromGlideSlope();
1403
1404     // set current_options lon/lat if an airport id is specified
1405     // cout << "3. airport_id = " << fgGetString("/sim/startup/airport-id") << endl;
1406     if ( fgGetString("/sim/startup/airport-id").length() ) {
1407         // fgSetPosFromAirportID( fgGetString("/sim/startup/airport-id") );
1408         fgSetPosFromAirportIDandHdg( fgGetString("/sim/startup/airport-id"),
1409                                      fgGetDouble("/orientation/heading-deg") );
1410     }
1411
1412     SGTime *t = fgInitTime();
1413     globals->set_time_params( t );
1414
1415     // Do some quick general initializations
1416     if( !fgInitGeneral()) {
1417         SG_LOG( SG_GENERAL, SG_ALERT,
1418                 "General initializations failed ..." );
1419         exit(-1);
1420     }
1421
1422     SGPath modelpath( globals->get_fg_root() );
1423     ssgModelPath( (char *)modelpath.c_str() );
1424
1425     // Scene graph root
1426     scene = new ssgRoot;
1427     scene->setName( "Scene" );
1428
1429     lighting = new ssgRoot;
1430     lighting->setName( "Lighting" );
1431
1432     // Initialize the sky
1433     SGPath ephem_data_path( globals->get_fg_root() );
1434     ephem_data_path.append( "Astro" );
1435     SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
1436     ephem->update( globals->get_time_params()->getMjd(),
1437                    globals->get_time_params()->getLst(),
1438                    0.0 );
1439     globals->set_ephem( ephem );
1440
1441     thesky = new SGSky;
1442
1443     SGPath sky_tex_path( globals->get_fg_root() );
1444     sky_tex_path.append( "Textures" );
1445     sky_tex_path.append( "Sky" );
1446     thesky->texture_path( sky_tex_path.str() );
1447
1448     thesky->build( 550.0, 550.0,
1449                    globals->get_ephem()->getNumPlanets(),
1450                    globals->get_ephem()->getPlanets(), 60000.0,
1451                    globals->get_ephem()->getNumStars(),
1452                    globals->get_ephem()->getStars(), 60000.0 );
1453
1454     if ( fgGetBool("/environment/clouds/status") ) {
1455         // thesky->add_cloud_layer( 2000.0, 200.0, 50.0, 40000.0,
1456         //                          SG_CLOUD_OVERCAST );
1457         thesky->add_cloud_layer( fgGetDouble("/environment/clouds/altitude-ft") *
1458                                  SG_FEET_TO_METER,
1459                                  200.0, 50.0, 40000.0,
1460                                  SG_CLOUD_MOSTLY_CLOUDY );
1461         // thesky->add_cloud_layer( 3000.0, 200.0, 50.0, 40000.0,
1462         //                          SG_CLOUD_MOSTLY_SUNNY );
1463         thesky->add_cloud_layer( 6000.0, 20.0, 10.0, 40000.0,
1464                                  SG_CLOUD_CIRRUS );
1465     }
1466
1467     // Initialize MagVar model
1468     SGMagVar *magvar = new SGMagVar();
1469     globals->set_mag( magvar );
1470
1471     // Terrain branch
1472     terrain_branch = new ssgBranch;
1473     terrain_branch->setName( "Terrain" );
1474     scene->addKid( terrain_branch );
1475
1476     // Lighting
1477     gnd_lights_branch = new ssgBranch;
1478     gnd_lights_branch->setName( "Ground Lighting" );
1479     lighting->addKid( gnd_lights_branch );
1480
1481     rwy_lights_branch = new ssgBranch;
1482     rwy_lights_branch->setName( "Runway Lighting" );
1483     lighting->addKid( rwy_lights_branch );
1484
1485     // airport = new ssgBranch;
1486     // airport->setName( "Airport Lighting" );
1487     // lighting->addKid( airport );
1488
1489     // ADA
1490     fgLoadDCS();
1491     // ADA
1492
1493     // temporary visible aircraft "own ship"
1494     current_model.init();
1495
1496 #ifdef FG_NETWORK_OLK
1497     // Do the network intialization
1498     if ( fgGetBool("/sim/networking/network-olk") ) {
1499         printf("Multipilot mode %s\n", fg_net_init( scene ) );
1500     }
1501 #endif
1502
1503     // build our custom render states
1504     fgBuildRenderStates();
1505
1506     // pass control off to the master GLUT event handler
1507     glutMainLoop();
1508
1509     // we never actually get here ... but to avoid compiler warnings,
1510     // etc.
1511     return 0;
1512 }
1513
1514
1515 // $$$ end - added VS Renganathan, 15 Oct 2K
1516 //         - added Venky         , 12 Nov 2K
1517
1518 #if defined(__linux__) && defined(__i386__)
1519
1520 static void handleFPE (int);
1521
1522 static void
1523 initFPE ()
1524 {
1525     fpu_control_t fpe_flags = 0;
1526     _FPU_GETCW(fpe_flags);
1527 //     fpe_flags &= ~_FPU_MASK_IM;      // invalid operation
1528 //     fpe_flags &= ~_FPU_MASK_DM;      // denormalized operand
1529 //     fpe_flags &= ~_FPU_MASK_ZM;      // zero-divide
1530 //     fpe_flags &= ~_FPU_MASK_OM;      // overflow
1531 //     fpe_flags &= ~_FPU_MASK_UM;      // underflow
1532 //     fpe_flags &= ~_FPU_MASK_PM;      // precision (inexact result)
1533     _FPU_SETCW(fpe_flags);
1534     signal(SIGFPE, handleFPE);
1535 }
1536
1537 static void
1538 handleFPE (int num)
1539 {
1540   initFPE();
1541   SG_LOG(SG_GENERAL, SG_ALERT, "Floating point interrupt (SIGFPE)");
1542 }
1543 #endif
1544
1545 // Main entry point; catch any exceptions that have made it this far.
1546 int main ( int argc, char **argv ) {
1547
1548     // Enable floating-point exceptions for Linux/x86
1549 #if defined(__linux__) && defined(__i386__)
1550     initFPE();
1551 #endif
1552
1553     // Enable floating-point exceptions for Windows
1554 #if defined( _MSC_VER ) && defined( DEBUG )
1555     // Christian, we should document what this does
1556     _control87( _EM_INEXACT, _MCW_EM );
1557 #endif
1558
1559 #if defined( HAVE_BC5PLUS )
1560     _control87(MCW_EM, MCW_EM);  /* defined in float.h */
1561 #endif
1562
1563     // FIXME: add other, more specific
1564     // exceptions.
1565     try {
1566         mainLoop(argc, argv);
1567     } catch (sg_throwable &t) {
1568         SG_LOG(SG_GENERAL, SG_ALERT,
1569                "Fatal error: " << t.getFormattedMessage()
1570                << "\n (received from " << t.getOrigin() << ')');
1571         exit(1);
1572     }
1573
1574     return 0;
1575 }
1576
1577
1578 void fgLoadDCS(void) {
1579
1580     ssgEntity *ship_obj = NULL;
1581
1582     char obj_filename[25];
1583
1584     for ( int k = 0; k < 32; k++ ) {
1585         ship_pos[k]=NULL;
1586     }
1587
1588     SGPath tile_path( globals->get_fg_root());
1589     tile_path.append( "Scenery" );
1590     tile_path.append( "Objects.txt" );
1591     sg_gzifstream in( tile_path.str() );
1592     if ( ! in.is_open() ) {
1593         SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: " << tile_path.str() );
1594     } else {
1595
1596         SGPath modelpath( globals->get_fg_root() );
1597         modelpath.append( "Models" );
1598         modelpath.append( "Geometry" );
1599
1600         SGPath texturepath( globals->get_fg_root() );
1601         texturepath.append( "Models" );
1602         texturepath.append( "Textures" );
1603
1604         ssgModelPath( (char *)modelpath.c_str() );
1605         ssgTexturePath( (char *)texturepath.c_str() );
1606
1607         ship_sel = new ssgSelector;
1608
1609         char c;
1610         while ( ! in.eof() ) {
1611             in >> ::skipws;
1612             if ( in.get( c ) && c == '#' ) {
1613                 in >> skipeol;
1614             } else {
1615                 in.putback(c);
1616                 in >> obj_filename >> obj_lat[objc] >> obj_lon[objc] >> obj_alt[objc];
1617                 /* cout << endl << obj_filename << " " << obj_lat[objc] << " " << obj_lon[objc] <<  " " << obj_alt[objc] << endl;
1618                    int chj=getchar();*/
1619
1620                 obj_lon[objc] *=SGD_DEGREES_TO_RADIANS;
1621                 obj_lat[objc] *=SGD_DEGREES_TO_RADIANS;
1622
1623                 ship_pos[objc] = new ssgTransform;
1624
1625                 // type "repeat" in objects.txt to load one more
1626                 // instance of the last object.
1627
1628                 if ( strcmp(obj_filename,"repeat") != 0) {
1629                     ship_obj = ssgLoad( obj_filename );
1630                 }
1631
1632                 if ( ship_obj != NULL ) {
1633                                         ship_obj->setName(obj_filename);
1634                                 if (objc == 0)
1635                                                 ship_obj->clrTraversalMaskBits( SSGTRAV_HOT );
1636                                         else
1637                                                 ship_obj->setTraversalMaskBits( SSGTRAV_HOT );
1638                     ship_pos[objc]->addKid( ship_obj ); // add object to transform node
1639                     ship_sel->addKid( ship_pos[objc] ); // add transform node to selector
1640                     SG_LOG( SG_TERRAIN, SG_ALERT, "Loaded file: "
1641                             << obj_filename );
1642                 } else {
1643                     SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: "
1644                             << obj_filename );
1645                 }
1646
1647                                 // temporary hack for deck lights - ultimately should move to PLib (when??)
1648                                 //const char *extn = file_extension ( obj_filename ) ;
1649                                 if ( objc == 1 ){
1650                                     ssgVertexArray *lights = new ssgVertexArray( 100 );
1651                                         ssgVertexArray *lightpoints = new ssgVertexArray( 100 );
1652                                         ssgVertexArray *lightnormals = new ssgVertexArray( 100 );
1653                                         ssgVertexArray *lightdir = new ssgVertexArray( 100 );
1654                                         int ltype[500], light_type;
1655                                         static int ltcount = 0;
1656                                     string token;
1657                                         sgVec3 rway_dir,rway_normal,lightpt;
1658                                         Point3D node;
1659                                         modelpath.append(obj_filename);
1660                                         sg_gzifstream in1( modelpath.str() );
1661                                         if ( ! in1.is_open() ) {
1662                                                 SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: " << modelpath.str() );
1663                                         } else {
1664                                                 while ( ! in1.eof() ) {
1665                                                         in1 >> ::skipws;
1666                                                         if ( in1.get( c ) && c == '#' ) {
1667                                                                 in1 >> skipeol;
1668                                                         } else {
1669                                                                 in1.putback(c);
1670                                                                 in1 >> token;
1671                                                                 //cout << token << endl;
1672                                                                 if ( token == "runway" ) {
1673                                                                         in1 >> node;
1674                                                                         sgSetVec3 (rway_dir, node[0], node[1], node[2] );
1675                                                                 } else if ( token == "edgelight" ) {
1676                                                                         in1 >> node;
1677                                                                         sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1678                                                                         light_type = 1;
1679                                                                 } else if ( token == "taxi" ) {
1680                                                                         in1 >> node;
1681                                                                         sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1682                                                                         light_type = 2;
1683                                                                 } else if ( token == "vasi" ) {
1684                                                                         in1 >> node;
1685                                                                         sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1686                                                                         light_type = 3;
1687                                                                 } else if ( token == "threshold" ) {
1688                                                                         in1 >> node;
1689                                                                         sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1690                                                                         light_type = 4;
1691                                                                 } else if ( token == "rabbit" ) {
1692                                                                         in1 >> node;
1693                                                                         sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1694                                                                         light_type = 5;
1695                                                                 } else if ( token == "ols" ) {
1696                                                                         in1 >> node;
1697                                                                         sgSetVec3 (rway_ols, node[0], node[1], node[2] );
1698                                                                         light_type = 6;
1699                                                                 } else if ( token == "red" ) {
1700                                                                         in1 >> node;
1701                                                                         sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1702                                                                         light_type = 7;
1703                                                                 } else if ( token == "green" ) {
1704                                                                         in1 >> node;
1705                                                                         sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1706                                                                         light_type = 8;
1707                                                                 } else if ( token == "lp" ) {
1708                                                                         in1 >> node;
1709                                                                         sgSetVec3 (lightpt, node[0], node[1], node[2] );
1710                                                                         lightpoints->add( lightpt );
1711                                                                         lightnormals->add( rway_normal );
1712                                                                         lightdir->add( rway_dir );
1713                                                                         ltype[ltcount]= light_type;
1714                                                                         ltcount++;
1715                                                                 }
1716                                                                 if (in1.eof()) break;
1717                                                         }
1718                                                 }  //while
1719
1720                                                 if ( lightpoints->getNum() ) {
1721                                                         ssgBranch *lightpoints_branch;
1722                                                         long int dummy = -999;
1723                                                         dummy_tile = new FGTileEntry((SGBucket)dummy);
1724                                                         dummy_tile->lightmaps_sequence = new ssgSelector;
1725                                                         dummy_tile->ols_transform = new ssgTransform;
1726
1727                                                         // call function to generate the runway lights
1728                                                         lightpoints_branch =
1729                                                         dummy_tile->gen_runway_lights( lightpoints, lightnormals,
1730                                                                                                                                 lightdir, ltype);
1731                                                         lightpoints_brightness->addKid(lightpoints_branch);
1732                                                         lightpoints_transform->addKid(lightpoints_brightness);
1733                                                     //dummy_tile->lightmaps_sequence->setTraversalMaskBits( SSGTRAV_HOT );
1734                                                         lightpoints_transform->addKid( dummy_tile->lightmaps_sequence );
1735                                                         lightpoints_transform->ref();
1736                                                         gnd_lights_branch->addKid( lightpoints_transform );
1737                                                 }
1738                                         } //if in1
1739                 } //if objc
1740                                 // end hack for deck lights
1741
1742                 objc++;
1743
1744                 if (in.eof()) break;
1745             }
1746         } // while
1747
1748         SG_LOG ( SG_TERRAIN, SG_ALERT, "Finished object processing." );
1749
1750         terrain_branch->addKid( ship_sel ); //add selector node to root node
1751     }
1752
1753     return;
1754  }
1755
1756
1757 void fgUpdateDCS (void) {
1758
1759     // double eye_lat,eye_lon,eye_alt;
1760     // static double obj_head;
1761     double sl_radius,obj_latgc;
1762     // float nresultmat[4][4];
1763     // sgMat4 Trans,rothead,rotlon,rot180,rotlat,resultmat1,resultmat2,resultmat3;
1764     double bz[3];
1765
1766     // Instantaneous Geodetic Lat/Lon/Alt of moving object
1767     FGADA *fdm = (FGADA *)current_aircraft.fdm_state;
1768
1769     // Deck should be the first object in objects.txt in case of fdm=ada
1770
1771     if (fgGetString("/sim/flight-model") == "ada") {
1772                 if ((fdm->get_iaux(1))==1)
1773                 {
1774                         obj_lat[1] = fdm->get_daux(1)*SGD_DEGREES_TO_RADIANS;
1775                         obj_lon[1] = fdm->get_daux(2)*SGD_DEGREES_TO_RADIANS;
1776                         obj_alt[1] = fdm->get_daux(3);
1777                         obj_pitch[1] = fdm->get_faux(1);
1778                         obj_roll[1] = fdm->get_faux(2);
1779                 }
1780     }
1781
1782     for ( int m = 0; m < objc; m++ ) {
1783         //cout << endl <<  obj_lat[m]*SGD_RADIANS_TO_DEGREES << " " << obj_lon[m]*SGD_RADIANS_TO_DEGREES << " " << obj_alt[m] << " " << objc << endl;
1784         //int v=getchar();
1785
1786         //Geodetic to Geocentric angles for rotation
1787         sgGeodToGeoc(obj_lat[m],obj_alt[m],&sl_radius,&obj_latgc);
1788
1789         //moving object gbs-posn in cartesian coords
1790         Point3D obj_posn = Point3D( obj_lon[m],obj_lat[m],obj_alt[m]);
1791         Point3D obj_pos = sgGeodToCart( obj_posn );
1792
1793         // Translate moving object w.r.t eye
1794         Point3D Objtrans = obj_pos-scenery.get_center();
1795         bz[0]=Objtrans.x();
1796         bz[1]=Objtrans.y();
1797         bz[2]=Objtrans.z();
1798
1799        // rotate dynamic objects for lat,lon & alt and other motion about its axes
1800
1801         sgMat4 sgTRANS;
1802         sgMakeTransMat4( sgTRANS, bz[0],bz[1],bz[2]);
1803
1804         sgVec3 ship_fwd,ship_rt,ship_up;
1805         sgSetVec3( ship_fwd, 1.0, 0.0, 0.0);//east,roll
1806         sgSetVec3( ship_rt, 0.0, 1.0, 0.0);//up,pitch
1807         sgSetVec3( ship_up, 0.0, 0.0, 1.0); //north,yaw
1808
1809         sgMat4 sgROT_lon, sgROT_lat, sgROT_hdg, sgROT_pitch, sgROT_roll;
1810         sgMakeRotMat4( sgROT_lon, obj_lon[m]*SGD_RADIANS_TO_DEGREES, ship_up );
1811         sgMakeRotMat4( sgROT_lat, 90-obj_latgc*SGD_RADIANS_TO_DEGREES, ship_rt );
1812         sgMakeRotMat4( sgROT_hdg, 180.0, ship_up );
1813         sgMakeRotMat4( sgROT_pitch, obj_pitch[m], ship_rt );
1814         sgMakeRotMat4( sgROT_roll, obj_roll[m], ship_fwd );
1815
1816         sgMat4 sgTUX;
1817         sgCopyMat4( sgTUX, sgROT_hdg );
1818         sgPostMultMat4( sgTUX, sgROT_pitch );
1819         sgPostMultMat4( sgTUX, sgROT_roll );
1820         sgPostMultMat4( sgTUX, sgROT_lat );
1821         sgPostMultMat4( sgTUX, sgROT_lon );
1822         sgPostMultMat4( sgTUX, sgTRANS );
1823
1824         sgCoord shippos;
1825         sgSetCoord(&shippos, sgTUX );
1826         ship_pos[m]->setTransform( &shippos );
1827         // temporary hack for deck lights - ultimately should move to PLib (when ??)
1828         if (m == 1) {
1829                 if (lightpoints_transform) {
1830                         lightpoints_transform->setTransform( &shippos );
1831                         float sun_angle = cur_light_params.sun_angle * SGD_RADIANS_TO_DEGREES;
1832                         if ( sun_angle > 89 ) {
1833                                 lightpoints_brightness->select(0x01);
1834                         } else {
1835                                 lightpoints_brightness->select(0x00);
1836                         }
1837                 }
1838
1839                 float elev;
1840                 sgVec3 rp,to;
1841                 float *vp;
1842                 float alt;
1843                 float ref_elev;
1844                 sgXformPnt3( rp, rway_ols, sgTUX );
1845                 vp = globals->get_current_view()->get_view_pos();
1846             to[0] = rp[0]-vp[0];
1847             to[1] = rp[1]-vp[1];
1848             to[2] = rp[2]-vp[2];
1849                 float dist = sgLengthVec3( to );
1850                 alt = (current_aircraft.fdm_state->get_Altitude() * SG_FEET_TO_METER)-rway_ols[2];
1851
1852                 elev = asin(alt/dist)*SGD_RADIANS_TO_DEGREES;
1853
1854             ref_elev = elev - 3.75; // +ve above, -ve below
1855
1856                 unsigned int sel;
1857                 sel = 0xFF;
1858 // DO NOT DELETE THIS CODE - This is to compare a discrete FLOLS (without LOD) with analog FLOLS
1859 //              if (ref_elev > 0.51) sel = 0x21;
1860 //              if ((ref_elev <= 0.51) & (ref_elev > 0.17)) sel = 0x22;
1861 //              if ((ref_elev <= 0.17) & (ref_elev >= -0.17)) sel = 0x24;
1862 //              if ((ref_elev < -0.17) & (ref_elev >= -0.51)) sel = 0x28;
1863 //              if (ref_elev < -0.51) sel = 0x30;
1864 // DO NOT DELETE THIS CODE - This is to compare a discrete FLOLS (without LOD) with analog FLOLS
1865                 dummy_tile->lightmaps_sequence->select(sel);
1866
1867                 sgVec3 up;
1868                 sgCopyVec3 (up, ship_up);
1869                 if (dist > 750)
1870                         sgScaleVec3 (up, 4.0*ref_elev*dist/750.0);
1871                 else
1872                         sgScaleVec3 (up, 4.0*ref_elev);
1873                 dummy_tile->ols_transform->setTransform(up);
1874                 //cout << "ref_elev  " << ref_elev << endl;
1875         }
1876     // end hack for deck lights
1877
1878     }
1879     if ( ship_sel != NULL ) {
1880         ship_sel->select(0xFFFFFFFE); // first object is ownship, added to acmodel
1881     }
1882 }
1883
1884 // $$$ end - added VS Renganathan, 15 Oct 2K
1885 //           added Venky         , 12 Nov 2K