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
  35 #include <iostream>
  36 SG_USING_STD(cerr);
  37 SG_USING_STD(endl);
  38
  39 #include <simgear/misc/exception.hxx>
  40 #include <simgear/ephemeris/ephemeris.hxx>
  41 #include <simgear/route/route.hxx>
  42
  43 #ifdef SG_MATH_EXCEPTION_CLASH
  44 #  include <math.h>
  45 #endif
  46
  47 #ifdef HAVE_WINDOWS_H
  48 #  include <windows.h>
  49 #  include <float.h>
  50 #endif
  51
  52 #include <GL/glut.h>
  53 #include <GL/gl.h>
  54
  55 #include <stdio.h>
  56 #include <string.h>             // for strcmp()
  57 #include <string>
  58
  59 #ifdef HAVE_STDLIB_H
  60 #   include <stdlib.h>
  61 #endif
  62
  63 #ifdef HAVE_SYS_STAT_H
  64 #  include <sys/stat.h>         // for stat()
  65 #endif
  66
  67 #ifdef HAVE_UNISTD_H
  68 #  include <unistd.h>           // for stat()
  69 #endif
  70
  71 #include <plib/netChat.h>
  72 #include <plib/pu.h>
  73 #include <plib/ssg.h>
  74
  75 #include <simgear/constants.h>  // for VERSION
  76 #include <simgear/debug/logstream.hxx>
  77 #include <simgear/math/polar3d.hxx>
  78 #include <simgear/math/sg_random.h>
  79 #include <simgear/misc/sg_path.hxx>
  80 #include <simgear/sky/sky.hxx>
  81 #include <simgear/timing/sg_time.hxx>
  82
  83 #include <Include/general.hxx>
  84
  85 #include <Aircraft/aircraft.hxx>
  86
  87 #include <ATC/ATCmgr.hxx>
  88 #include <ATC/ATCdisplay.hxx>
  89 #include <ATC/AIMgr.hxx>
  90
  91 #include <Autopilot/newauto.hxx>
  92
  93 #include <Cockpit/cockpit.hxx>
  94 #include <Cockpit/radiostack.hxx>
  95 #include <Cockpit/steam.hxx>
  96
  97 #include <FDM/UIUCModel/uiuc_aircraftdir.h>
  98 #include <GUI/gui.h>
  99 // #include <Joystick/joystick.hxx>
 100 #ifdef FG_NETWORK_OLK
 101 #include <NetworkOLK/network.h>
 102 #endif
 103 #include <Objects/matlib.hxx>
 104 #include <Scenery/scenery.hxx>
 105 #include <Scenery/tilemgr.hxx>
 106 #ifdef ENABLE_AUDIO_SUPPORT
 107 #  include <Sound/soundmgr.hxx>
 108 #  include <Sound/fg_fx.hxx>
 109 #  include <Sound/morse.hxx>
 110 #endif
 111 #include <Time/event.hxx>
 112 #include <Time/fg_timer.hxx>
 113 #include <Time/light.hxx>
 114 #include <Time/sunpos.hxx>
 115 #include <Time/tmp.hxx>
 116
 117 #include <Input/input.hxx>
 118
 119 // ADA
 120 #include <simgear/misc/sgstream.hxx>
 121 #include <simgear/math/point3d.hxx>
 122 #include <FDM/flight.hxx>
 123 #include <FDM/ADA.hxx>
 124 #include <Scenery/tileentry.hxx>
 125
 126 // Should already be inlcluded by gl.h if needed by your platform so
 127 // we shouldn't include this here.
 128 // #include <GL/glext.h>
 129 #if !defined(sgi)
 130 // PFNGLPOINTPARAMETERFEXTPROC glPointParameterfEXT = 0;
 131 // PFNGLPOINTPARAMETERFVEXTPROC glPointParameterfvEXT = 0;
 132 #endif
 133 float default_attenuation[3] = {1.0, 0.0, 0.0};
 134 //Required for using GL_extensions
 135 void fgLoadDCS (void);
 136 void fgUpdateDCS (void);
 137 ssgSelector *ship_sel=NULL;
 138 // upto 32 instances of a same object can be loaded.
 139 ssgTransform *ship_pos[32];
 140 double obj_lat[32],obj_lon[32],obj_alt[32],obj_pitch[32],obj_roll[32];
 141 int objc=0;
 142 ssgSelector *lightpoints_brightness = new ssgSelector;
 143 ssgTransform *lightpoints_transform = new ssgTransform;
 144 FGTileEntry *dummy_tile;
 145 sgVec3 rway_ols;
 146 // ADA
 147 // Clip plane settings...
 148 float cockpit_nearplane = 0.01f;
 149 float cockpit_farplane = 100.0f;
 150 float scene_nearplane = 0.5f;
 151 float scene_farplane = 120000.0f;
 152
 153
 154 #ifndef FG_NEW_ENVIRONMENT
 155 #  include <WeatherCM/FGLocalWeatherDatabase.h>
 156 #else
 157 #  include <Environment/environment_mgr.hxx>
 158 #endif
 159
 160 #include "version.h"
 161
 162 #include "fg_init.hxx"
 163 #include "fg_io.hxx"
 164 #include "fg_props.hxx"
 165 #include "globals.hxx"
 166 #include "splash.hxx"
 167 #include "viewmgr.hxx"
 168 #include "options.hxx"
 169 #include "logger.hxx"
 170 #include "model.hxx"
 171
 172 #ifdef macintosh
 173 #  include <console.h>          // -dw- for command line dialog
 174 #endif
 175
 176
 177 // This is a record containing a bit of global housekeeping information
 178 FGGeneral general;
 179
 180 // Specify our current idle function state.  This is used to run all
 181 // our initializations out of the glutIdleLoop() so that we can get a
 182 // splash screen up and running right away.
 183 static int idle_state = 0;
 184 static long global_multi_loop;
 185
 186 // forward declaration
 187 void fgReshape( int width, int height );
 188
 189 // ssg variables
 190 ssgRoot *scene = NULL;
 191 ssgRoot *cockpit = NULL;
 192 ssgBranch *terrain_branch = NULL;
 193 ssgBranch *gnd_lights_branch = NULL;
 194 ssgBranch *rwy_lights_branch = NULL;
 195
 196 // fog constants.  I'm a little nervous about putting actual code out
 197 // here but it seems to work (?)
 198 static const double m_log01 = -log( 0.01 );
 199 static const double sqrt_m_log01 = sqrt( m_log01 );
 200 static GLfloat fog_exp_density;
 201 static GLfloat fog_exp2_density;
 202 static GLfloat fog_exp2_punch_through;
 203
 204 ssgRoot *lighting = NULL;
 205 // ssgBranch *airport = NULL;
 206
 207 #ifdef FG_NETWORK_OLK
 208 ssgSelector *fgd_sel = NULL;
 209 ssgTransform *fgd_pos = NULL;
 210 #endif
 211
 212 // current fdm/position used for view
 213 FGInterface cur_view_fdm;
 214
 215 // Sky structures
 216 SGSky *thesky;
 217
 218 // hack
 219 sgMat4 copy_of_ssgOpenGLAxisSwapMatrix =
 220 {
 221   {  1.0f,  0.0f,  0.0f,  0.0f },
 222   {  0.0f,  0.0f, -1.0f,  0.0f },
 223   {  0.0f,  1.0f,  0.0f,  0.0f },
 224   {  0.0f,  0.0f,  0.0f,  1.0f }
 225 };
 226
 227 // The following defines flightgear options. Because glutlib will also
 228 // want to parse its own options, those options must not be included here
 229 // or they will get parsed by the main program option parser. Hence case
 230 // is significant for any option added that might be in conflict with
 231 // glutlib's parser.
 232 //
 233 // glutlib parses for:
 234 //    -display
 235 //    -direct   (invalid in Win32)
 236 //    -geometry
 237 //    -gldebug
 238 //    -iconized
 239 //    -indirect (invalid in Win32)
 240 //    -synce
 241 //
 242 // Note that glutlib depends upon strings while this program's
 243 // option parser wants only initial characters followed by numbers
 244 // or pathnames.
 245 //
 246
 247
 248 ssgSimpleState *default_state;
 249 ssgSimpleState *hud_and_panel;
 250 ssgSimpleState *menus;
 251
 252 SGTimeStamp start_time_stamp;
 253 SGTimeStamp current_time_stamp;
 254
 255 void fgBuildRenderStates( void ) {
 256     default_state = new ssgSimpleState;
 257     default_state->ref();
 258     default_state->disable( GL_TEXTURE_2D );
 259     default_state->enable( GL_CULL_FACE );
 260     default_state->enable( GL_COLOR_MATERIAL );
 261     default_state->setColourMaterial( GL_AMBIENT_AND_DIFFUSE );
 262     default_state->setMaterial( GL_EMISSION, 0, 0, 0, 1 );
 263     default_state->setMaterial( GL_SPECULAR, 0, 0, 0, 1 );
 264     default_state->disable( GL_BLEND );
 265     default_state->disable( GL_ALPHA_TEST );
 266     default_state->disable( GL_LIGHTING );
 267
 268     hud_and_panel = new ssgSimpleState;
 269     hud_and_panel->ref();
 270     hud_and_panel->disable( GL_CULL_FACE );
 271     hud_and_panel->disable( GL_TEXTURE_2D );
 272     hud_and_panel->disable( GL_LIGHTING );
 273     hud_and_panel->enable( GL_BLEND );
 274
 275     menus = new ssgSimpleState;
 276     menus->ref();
 277     menus->disable( GL_CULL_FACE );
 278     menus->disable( GL_TEXTURE_2D );
 279     menus->enable( GL_BLEND );
 280 }
 281
 282 // fgInitVisuals() -- Initialize various GL/view parameters
 283 void fgInitVisuals( void ) {
 284     fgLIGHT *l;
 285
 286     l = &cur_light_params;
 287
 288 #ifndef GLUT_WRONG_VERSION
 289     // Go full screen if requested ...
 290     if ( fgGetBool("/sim/startup/fullscreen") ) {
 291         glutFullScreen();
 292     }
 293 #endif
 294
 295     // If enabled, normal vectors specified with glNormal are scaled
 296     // to unit length after transformation.  See glNormal.
 297     // glEnable( GL_NORMALIZE );
 298
 299     glEnable( GL_LIGHTING );
 300     glEnable( GL_LIGHT0 );
 301     glLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
 302
 303     sgVec3 sunpos;
 304     sgSetVec3( sunpos, l->sun_vec[0], l->sun_vec[1], l->sun_vec[2] );
 305     ssgGetLight( 0 ) -> setPosition( sunpos );
 306
 307     // glFogi (GL_FOG_MODE, GL_LINEAR);
 308     glFogi (GL_FOG_MODE, GL_EXP2);
 309     if ( (!strcmp(fgGetString("/sim/rendering/fog"), "disabled")) ||
 310          (!fgGetBool("/sim/rendering/shading"))) {
 311         // if fastest fog requested, or if flat shading force fastest
 312         glHint ( GL_FOG_HINT, GL_FASTEST );
 313     } else if ( !strcmp(fgGetString("/sim/rendering/fog"), "nicest") ) {
 314         glHint ( GL_FOG_HINT, GL_NICEST );
 315     }
 316     if ( fgGetBool("/sim/rendering/wireframe") ) {
 317         // draw wire frame
 318         glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
 319     }
 320
 321     // This is the default anyways, but it can't hurt
 322     glFrontFace ( GL_CCW );
 323
 324     // Just testing ...
 325     // glEnable(GL_POINT_SMOOTH);
 326     // glEnable(GL_LINE_SMOOTH);
 327     // glEnable(GL_POLYGON_SMOOTH);
 328 }
 329
 330
 331 // For HiRes screen Dumps using Brian Pauls TR Library
 332 void trRenderFrame( void ) {
 333
 334     if ( fgPanelVisible() ) {
 335         GLfloat height = fgGetInt("/sim/startup/ysize");
 336         GLfloat view_h =
 337             (current_panel->getViewHeight() - current_panel->getYOffset())
 338             * (height / 768.0) + 1;
 339         glTranslatef( 0.0, view_h, 0.0 );
 340     }
 341
 342     static GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
 343     static GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
 344
 345     fgLIGHT *l = &cur_light_params;
 346
 347     glClearColor(l->adj_fog_color[0], l->adj_fog_color[1],
 348                  l->adj_fog_color[2], l->adj_fog_color[3]);
 349
 350     glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
 351
 352     // set the opengl state to known default values
 353     default_state->force();
 354
 355     glEnable( GL_FOG );
 356     glFogf  ( GL_FOG_DENSITY, fog_exp2_density);
 357     glFogi  ( GL_FOG_MODE,    GL_EXP2 );
 358     glFogfv ( GL_FOG_COLOR,   l->adj_fog_color );
 359
 360     // GL_LIGHT_MODEL_AMBIENT has a default non-zero value so if
 361     // we only update GL_AMBIENT for our lights we will never get
 362     // a completely dark scene.  So, we set GL_LIGHT_MODEL_AMBIENT
 363     // explicitely to black.
 364     glLightModelfv( GL_LIGHT_MODEL_AMBIENT, black );
 365
 366     ssgGetLight( 0 ) -> setColour( GL_AMBIENT, l->scene_ambient );
 367
 368     // texture parameters
 369     glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
 370     glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
 371
 372     // we need a white diffuse light for the phase of the moon
 373     ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, white );
 374     thesky->preDraw();
 375
 376     // draw the ssg scene
 377     // return to the desired diffuse color
 378     ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
 379     glEnable( GL_DEPTH_TEST );
 380     ssgSetNearFar( scene_nearplane, scene_farplane );
 381     ssgCullAndDraw( scene );
 382
 383     // if in cockpit view adjust nearfar...
 384     if (globals->get_current_view()->getType() == 0 )
 385       ssgSetNearFar( cockpit_nearplane, cockpit_farplane );
 386     ssgCullAndDraw( cockpit );
 387
 388     // draw the lights
 389     glFogf (GL_FOG_DENSITY, fog_exp2_punch_through);
 390     ssgSetNearFar( scene_nearplane, scene_farplane );
 391     ssgCullAndDraw( lighting );
 392
 393     thesky->postDraw( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER );
 394
 395     // need to do this here as hud_and_panel state is static to
 396     // main.cxx  and HUD and Panel routines have to be called with
 397     // knowledge of the the TR struct < see gui.cxx::HighResDump()
 398     hud_and_panel->apply();
 399 }
 400
 401
 402 // Update all Visuals (redraws anything graphics related)
 403 void fgRenderFrame( void ) {
 404
 405     static long old_elapsed_ms = 0;
 406
 407     int dt_ms = int(globals->get_elapsed_time_ms() - old_elapsed_ms);
 408     old_elapsed_ms = globals->get_elapsed_time_ms();
 409
 410     static const SGPropertyNode *longitude
 411         = fgGetNode("/position/longitude-deg");
 412     static const SGPropertyNode *latitude
 413         = fgGetNode("/position/latitude-deg");
 414     static const SGPropertyNode *altitude
 415         = fgGetNode("/position/altitude-ft");
 416
 417     // Update the default (kludged) properties.
 418     fgUpdateProps();
 419
 420     fgLIGHT *l = &cur_light_params;
 421     static double last_visibility = -9999;
 422
 423     // update fog params
 424     double actual_visibility       = thesky->get_visibility();
 425     if ( actual_visibility != last_visibility ) {
 426         last_visibility = actual_visibility;
 427
 428         fog_exp_density = m_log01 / actual_visibility;
 429         fog_exp2_density = sqrt_m_log01 / actual_visibility;
 430         fog_exp2_punch_through = sqrt_m_log01 / ( actual_visibility * 2.5 );
 431     }
 432
 433     // double angle;
 434     // GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
 435     // GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
 436     // GLfloat terrain_color[4] = { 0.54, 0.44, 0.29, 1.0 };
 437     // GLfloat mat_shininess[] = { 10.0 };
 438     GLbitfield clear_mask;
 439
 440     if ( idle_state != 1000 ) {
 441         // still initializing, draw the splash screen
 442         if ( fgGetBool("/sim/startup/splash-screen") ) {
 443             fgSplashUpdate(0.0);
 444         }
 445         start_time_stamp.stamp(); // Keep resetting the start time
 446     } else {
 447         // idle_state is now 1000 meaning we've finished all our
 448         // initializations and are running the main loop, so this will
 449         // now work without seg faulting the system.
 450
 451                                 // Update the elapsed time.
 452         current_time_stamp.stamp();
 453         globals->set_elapsed_time_ms((current_time_stamp - start_time_stamp)
 454                                      / 1000L);
 455
 456         // calculate our current position in cartesian space
 457         scenery.set_center( scenery.get_next_center() );
 458
 459         // update view port
 460         fgReshape( fgGetInt("/sim/startup/xsize"),
 461                    fgGetInt("/sim/startup/ysize") );
 462
 463         // set the sun position
 464         glLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );
 465
 466         clear_mask = GL_DEPTH_BUFFER_BIT;
 467         if ( fgGetBool("/sim/rendering/wireframe") ) {
 468             clear_mask |= GL_COLOR_BUFFER_BIT;
 469         }
 470
 471         if ( fgGetBool("/sim/rendering/skyblend") ) {
 472             if ( fgGetBool("/sim/rendering/textures") ) {
 473                 // glClearColor(black[0], black[1], black[2], black[3]);
 474                 glClearColor(l->adj_fog_color[0], l->adj_fog_color[1],
 475                              l->adj_fog_color[2], l->adj_fog_color[3]);
 476                 clear_mask |= GL_COLOR_BUFFER_BIT;
 477             }
 478         } else {
 479             glClearColor(l->sky_color[0], l->sky_color[1],
 480                          l->sky_color[2], l->sky_color[3]);
 481             clear_mask |= GL_COLOR_BUFFER_BIT;
 482         }
 483         glClear( clear_mask );
 484
 485         // Tell GL we are switching to model view parameters
 486
 487         // I really should create a derived ssg node or use a call
 488         // back or something so that I can draw the sky within the
 489         // ssgCullAndDraw() function, but for now I just mimic what
 490         // ssg does to set up the model view matrix
 491         glMatrixMode(GL_MODELVIEW);
 492         glLoadIdentity();
 493         ssgSetCamera( (sgVec4 *)globals->get_current_view()->get_VIEW() );
 494
 495         // set the opengl state to known default values
 496         default_state->force();
 497
 498         // update fog params if visibility has changed
 499         thesky->set_visibility(fgGetDouble("/environment/visibility-m"));
 500
 501         thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 502                             ( global_multi_loop * fgGetInt("/sim/speed-up") )
 503                             / (double)fgGetInt("/sim/model-hz") );
 504
 505         // Set correct opengl fog density
 506         glFogf (GL_FOG_DENSITY, fog_exp2_density);
 507
 508         // update the sky dome
 509         if ( fgGetBool("/sim/rendering/skyblend") ) {
 510             /* cout << "thesky->repaint() sky_color = "
 511                  << cur_light_params.sky_color[0] << " "
 512                  << cur_light_params.sky_color[1] << " "
 513                  << cur_light_params.sky_color[2] << " "
 514                  << cur_light_params.sky_color[3] << endl;
 515             cout << "    fog = "
 516                  << cur_light_params.fog_color[0] << " "
 517                  << cur_light_params.fog_color[1] << " "
 518                  << cur_light_params.fog_color[2] << " "
 519                  << cur_light_params.fog_color[3] << endl;
 520             cout << "    sun_angle = " << cur_light_params.sun_angle
 521                  << "    moon_angle = " << cur_light_params.moon_angle
 522                  << endl; */
 523             thesky->repaint( cur_light_params.sky_color,
 524                              cur_light_params.adj_fog_color,
 525                              cur_light_params.sun_angle,
 526                              cur_light_params.moon_angle,
 527                              globals->get_ephem()->getNumPlanets(),
 528                              globals->get_ephem()->getPlanets(),
 529                              globals->get_ephem()->getNumStars(),
 530                              globals->get_ephem()->getStars() );
 531
 532             /* cout << "thesky->reposition( view_pos = " << view_pos[0] << " "
 533                  << view_pos[1] << " " << view_pos[2] << endl;
 534             cout << "    zero_elev = " << zero_elev[0] << " "
 535                  << zero_elev[1] << " " << zero_elev[2]
 536                  << " lon = " << cur_fdm_state->get_Longitude()
 537                  << " lat = " << cur_fdm_state->get_Latitude() << endl;
 538             cout << "    sun_rot = " << cur_light_params.sun_rotation
 539                  << " gst = " << SGTime::cur_time_params->getGst() << endl;
 540             cout << "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 541                  << " sun dec = " << globals->get_ephem()->getSunDeclination()
 542                  << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 543                  << " moon dec = " << globals->get_ephem()->getMoonDeclination() << endl; */
 544
 545             thesky->reposition( globals->get_current_view()->get_view_pos(),
 546                                 globals->get_current_view()->get_zero_elev(),
 547                                 globals->get_current_view()->get_world_up(),
 548                                 longitude->getDoubleValue()
 549                                   * SGD_DEGREES_TO_RADIANS,
 550                                 latitude->getDoubleValue()
 551                                   * SGD_DEGREES_TO_RADIANS,
 552                                 altitude->getDoubleValue() * SG_FEET_TO_METER,
 553                                 cur_light_params.sun_rotation,
 554                                 globals->get_time_params()->getGst(),
 555                                 globals->get_ephem()->getSunRightAscension(),
 556                                 globals->get_ephem()->getSunDeclination(),
 557                                 50000.0,
 558                                 globals->get_ephem()->getMoonRightAscension(),
 559                                 globals->get_ephem()->getMoonDeclination(),
 560                                 50000.0 );
 561         }
 562
 563         glEnable( GL_DEPTH_TEST );
 564         if ( strcmp(fgGetString("/sim/rendering/fog"), "disabled") ) {
 565             glEnable( GL_FOG );
 566             glFogi( GL_FOG_MODE, GL_EXP2 );
 567             glFogfv( GL_FOG_COLOR, l->adj_fog_color );
 568         }
 569
 570         // set sun/lighting parameters
 571         ssgGetLight( 0 ) -> setPosition( l->sun_vec );
 572
 573         // GL_LIGHT_MODEL_AMBIENT has a default non-zero value so if
 574         // we only update GL_AMBIENT for our lights we will never get
 575         // a completely dark scene.  So, we set GL_LIGHT_MODEL_AMBIENT
 576         // explicitely to black.
 577         GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
 578         GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
 579         glLightModelfv( GL_LIGHT_MODEL_AMBIENT, black );
 580
 581         ssgGetLight( 0 ) -> setColour( GL_AMBIENT, l->scene_ambient );
 582         ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
 583         // ssgGetLight( 0 ) -> setColour( GL_SPECULAR, l->scene_white );
 584
 585         // texture parameters
 586         // glEnable( GL_TEXTURE_2D );
 587         glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
 588         glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
 589
 590         // glMatrixMode( GL_PROJECTION );
 591         // glLoadIdentity();
 592         ssgSetFOV( globals->get_current_view()->get_h_fov(),
 593                    globals->get_current_view()->get_v_fov() );
 594
 595         double agl = current_aircraft.fdm_state->get_Altitude() * SG_FEET_TO_METER
 596             - scenery.get_cur_elev();
 597
 598 //      if (fgGetBool("/sim/view/internal"))
 599 //        ssgSetNearFar( 0.2f, 120000.0f );
 600 //      else if ( agl > 10.0)
 601
 602         if ( agl > 10.0 ) {
 603             scene_nearplane = 10.0f;
 604             scene_farplane = 120000.0f;
 605         } else {
 606             scene_nearplane = 0.5f;
 607             scene_farplane = 120000.0f;
 608         }
 609
 610         ssgSetNearFar( scene_nearplane, scene_farplane );
 611
 612         current_model.update(dt_ms);
 613
 614         // $$$ begin - added VS Renganthan 17 Oct 2K
 615         fgUpdateDCS();
 616         // $$$ end - added VS Renganthan 17 Oct 2K
 617
 618 # ifdef FG_NETWORK_OLK
 619         if ( fgGetBool("/sim/networking/network-olk") ) {
 620             sgCoord fgdpos;
 621             other = head->next;             /* put listpointer to start  */
 622             while ( other != tail) {        /* display all except myself */
 623                 if ( strcmp( other->ipadr, fgd_mcp_ip) != 0) {
 624                     other->fgd_sel->select(1);
 625                     sgSetCoord( &fgdpos, other->sgFGD_COORD );
 626                     other->fgd_pos->setTransform( &fgdpos );
 627                 }
 628                 other = other->next;
 629             }
 630
 631             // fgd_sel->select(1);
 632             // sgCopyMat4( sgTUX, current_view.sgVIEW);
 633             // sgCoord fgdpos;
 634             // sgSetCoord( &fgdpos, sgFGD_VIEW );
 635             // fgd_pos->setTransform( &fgdpos);
 636         }
 637 # endif
 638
 639         // position tile nodes and update range selectors
 640         global_tile_mgr.prep_ssg_nodes();
 641
 642         if ( fgGetBool("/sim/rendering/skyblend") ) {
 643             // draw the sky backdrop
 644
 645             // we need a white diffuse light for the phase of the moon
 646             ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, white );
 647
 648             thesky->preDraw();
 649
 650             // return to the desired diffuse color
 651             ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse );
 652         }
 653
 654         // draw the ssg scene
 655         glEnable( GL_DEPTH_TEST );
 656
 657         ssgSetNearFar( scene_nearplane, scene_farplane );
 658         ssgCullAndDraw( scene );
 659
 660         // change state for lighting here
 661
 662         // draw lighting
 663         // Set punch through fog density
 664         glFogf (GL_FOG_DENSITY, fog_exp2_punch_through);
 665
 666 #ifdef FG_EXPERIMENTAL_LIGHTING
 667         // Enable states for drawing points with GL_extension
 668         if (glutExtensionSupported("GL_EXT_point_parameters")) {
 669             glEnable(GL_POINT_SMOOTH);
 670             float quadratic[3] = {1.0, 0.01, 0.0001};
 671             // get the address of our OpenGL extensions
 672 #if !defined(sgi)
 673             glPointParameterfEXT = (PFNGLPOINTPARAMETERFEXTPROC)
 674                 wglGetProcAddress("glPointParameterfEXT");
 675             glPointParameterfvEXT = (PFNGLPOINTPARAMETERFVEXTPROC)
 676                 wglGetProcAddress("glPointParameterfvEXT");
 677 #endif
 678             // makes the points fade as they move away
 679             glPointParameterfvEXT(GL_DISTANCE_ATTENUATION_EXT, quadratic);
 680             glPointParameterfEXT(GL_POINT_SIZE_MIN_EXT, 1.0);
 681             glPointSize(4.0);
 682
 683             // Enable states for drawing runway lights with spherical mapping
 684             glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
 685             glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
 686             glEnable(GL_TEXTURE_GEN_S);
 687             glEnable(GL_TEXTURE_GEN_T);
 688
 689             //Maybe this is not the best way, but it works !!
 690             glPolygonMode(GL_FRONT, GL_POINT);
 691             glCullFace(GL_BACK);
 692             glEnable(GL_CULL_FACE);
 693         }
 694
 695         glDisable( GL_LIGHTING );
 696         // blending function for runway lights
 697         glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) ;
 698         glEnable(GL_BLEND);
 699 #endif
 700
 701         ssgSetNearFar( scene_nearplane, scene_farplane );
 702         ssgCullAndDraw( lighting );
 703
 704
 705 #ifdef FG_EXPERIMENTAL_LIGHTING
 706         if (glutExtensionSupported("GL_EXT_point_parameters")) {
 707             // Disable states used for runway lighting
 708             glPolygonMode(GL_FRONT, GL_FILL);
 709
 710             glDisable(GL_TEXTURE_GEN_S);
 711             glDisable(GL_TEXTURE_GEN_T);
 712             glPointParameterfvEXT(GL_DISTANCE_ATTENUATION_EXT,
 713                                   default_attenuation);
 714         }
 715
 716         glPointSize(1.0);
 717 #endif
 718
 719         if ( fgGetBool("/sim/rendering/skyblend") ) {
 720             // draw the sky cloud layers
 721             thesky->postDraw( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER );
 722         }
 723
 724         // if in cockpit view adjust nearfar...
 725         if (globals->get_current_view()->getType() == 0 ) {
 726           glClearDepth(1);
 727           glClear(GL_DEPTH_BUFFER_BIT);
 728           ssgSetNearFar( cockpit_nearplane, cockpit_farplane );
 729           ssgCullAndDraw( cockpit );
 730         } else {
 731           ssgCullAndDraw( cockpit );
 732         }
 733
 734         // display HUD && Panel
 735         glDisable( GL_FOG );
 736         glDisable( GL_DEPTH_TEST );
 737         // glDisable( GL_CULL_FACE );
 738         // glDisable( GL_TEXTURE_2D );
 739
 740         // update the input subsystem
 741         current_input.update(dt_ms);
 742
 743         // update the controls subsystem
 744         globals->get_controls()->update(dt_ms);
 745
 746         hud_and_panel->apply();
 747         fgCockpitUpdate();
 748
 749         // Use the hud_and_panel ssgSimpleState for rendering the ATC output
 750         // This only works properly if called before the panel call
 751         globals->get_ATC_display()->update(dt_ms);
 752
 753         // update the panel subsystem
 754         if ( current_panel != NULL ) {
 755             current_panel->update(dt_ms);
 756         }
 757
 758         // We can do translucent menus, so why not. :-)
 759         menus->apply();
 760         glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
 761         puDisplay();
 762         // glDisable ( GL_BLEND ) ;
 763
 764         // glEnable( GL_FOG );
 765
 766         globals->get_logger()->update(dt_ms);
 767     }
 768
 769     glutSwapBuffers();
 770 }
 771
 772
 773 // Update internal time dependent calculations (i.e. flight model)
 774 void fgUpdateTimeDepCalcs() {
 775     static bool inited = false;
 776     static const SGPropertyNode *master_freeze
 777         = fgGetNode("/sim/freeze/master");
 778
 779     //SG_LOG(SG_FLIGHT,SG_INFO, "Updating time dep calcs()");
 780
 781     fgLIGHT *l = &cur_light_params;
 782     int i;
 783
 784     long multi_loop = 1;
 785
 786     // Initialize the FDM here if it hasn't been and if we have a
 787     // scenery elevation hit.
 788
 789     // cout << "cur_fdm_state->get_inited() = " << cur_fdm_state->get_inited()
 790     //      << " cur_elev = " << scenery.get_cur_elev() << endl;
 791
 792     if ( !cur_fdm_state->get_inited() && scenery.get_cur_elev() > -9990 ) {
 793   SG_LOG(SG_FLIGHT,SG_INFO, "Finally initializing fdm");
 794
 795         cur_fdm_state->init();
 796         if ( cur_fdm_state->get_bound() ) {
 797             cur_fdm_state->unbind();
 798         }
 799         cur_fdm_state->bind();
 800     }
 801
 802     // conceptually, the following block could be done for each fdm
 803     // instance ...
 804     if ( !cur_fdm_state->get_inited() ) {
 805         // do nothing, fdm isn't inited yet
 806     } else if ( master_freeze->getBoolValue() ) {
 807         // we are frozen, run the fdm's with 0 time slices in case
 808         // they want to do something with that.
 809
 810         cur_fdm_state->update( 0 );
 811         FGSteam::update( 0 );
 812     } else {
 813         // we have been inited, and we are not frozen, we are good to go ...
 814
 815         if ( !inited ) {
 816             cur_fdm_state->stamp();
 817             inited = true;
 818         }
 819
 820         SGTimeStamp current;
 821         current.stamp();
 822         long elapsed = current - cur_fdm_state->get_time_stamp();
 823         cur_fdm_state->set_time_stamp( current );
 824         elapsed += cur_fdm_state->get_remainder();
 825         // cout << "elapsed = " << elapsed << endl;
 826         // cout << "dt = " << cur_fdm_state->get_delta_t() << endl;
 827         multi_loop = (long)(((double)elapsed * 0.000001) /
 828                                cur_fdm_state->get_delta_t() );
 829         cur_fdm_state->set_multi_loop( multi_loop );
 830         long remainder = elapsed - (long)( (multi_loop*1000000) *
 831                                      cur_fdm_state->get_delta_t() );
 832         cur_fdm_state->set_remainder( remainder );
 833         // cout << "remainder = " << remainder << endl;
 834
 835         // chop max interations to something reasonable if the sim was
 836         // delayed for an excesive amount of time
 837         if ( multi_loop > 2.0 / cur_fdm_state->get_delta_t() ) {
 838             multi_loop = (int)(2.0 / cur_fdm_state->get_delta_t());
 839             cur_fdm_state->set_remainder( 0 );
 840         }
 841
 842         // cout << "multi_loop = " << multi_loop << endl;
 843         for ( i = 0; i < multi_loop * fgGetInt("/sim/speed-up"); ++i ) {
 844             // run Autopilot system
 845             globals->get_autopilot()->update(0); // FIXME: use real dt
 846
 847             // update FDM
 848             cur_fdm_state->update( 1 );
 849         }
 850         FGSteam::update( multi_loop * fgGetInt("/sim/speed-up") );
 851     }
 852
 853     if ( !strcmp(fgGetString("/sim/view-mode"), "pilot") ) {
 854         cur_view_fdm = *cur_fdm_state;
 855         // do nothing
 856     }
 857
 858     // update the view angle
 859     globals->get_viewmgr()->update(multi_loop);
 860
 861     l->UpdateAdjFog();
 862
 863     // Update solar system
 864     globals->get_ephem()->update( globals->get_time_params()->getMjd(),
 865                                   globals->get_time_params()->getLst(),
 866                                   cur_fdm_state->get_Latitude() );
 867
 868     // Update radio stack model
 869     current_radiostack->update(multi_loop);
 870 }
 871
 872
 873 void fgInitTimeDepCalcs( void ) {
 874     // initialize timer
 875
 876     // #ifdef HAVE_SETITIMER
 877     //   fgTimerInit( 1.0 / fgGetInt("/sim/model-hz"),
 878     //                fgUpdateTimeDepCalcs );
 879     // #endif HAVE_SETITIMER
 880 }
 881
 882
 883 static const double alt_adjust_ft = 3.758099;
 884 static const double alt_adjust_m = alt_adjust_ft * SG_FEET_TO_METER;
 885
 886
 887 // What should we do when we have nothing else to do?  Let's get ready
 888 // for the next move and update the display?
 889 static void fgMainLoop( void ) {
 890     static const SGPropertyNode *longitude
 891         = fgGetNode("/position/longitude-deg");
 892     static const SGPropertyNode *latitude
 893         = fgGetNode("/position/latitude-deg");
 894     static const SGPropertyNode *altitude
 895         = fgGetNode("/position/altitude-ft");
 896     static const SGPropertyNode *clock_freeze
 897         = fgGetNode("/sim/freeze/clock", true);
 898     static const SGPropertyNode *cur_time_override
 899         = fgGetNode("/sim/time/cur-time-override", true);
 900
 901     static long remainder = 0;
 902     long elapsed;
 903 #ifdef FANCY_FRAME_COUNTER
 904     int i;
 905     double accum;
 906 #else
 907     static time_t last_time = 0;
 908     static int frames = 0;
 909 #endif // FANCY_FRAME_COUNTER
 910
 911     SGTime *t = globals->get_time_params();
 912
 913     SG_LOG( SG_ALL, SG_DEBUG, "Running Main Loop");
 914     SG_LOG( SG_ALL, SG_DEBUG, "======= ==== ====");
 915
 916 #ifdef FG_NETWORK_OLK
 917     if ( fgGetBool("/sim/networking/network-olk") ) {
 918         if ( net_is_registered == 0 ) {      // We first have to reg. to fgd
 919             // printf("FGD: Netupdate\n");
 920             fgd_send_com( "A", FGFS_host);   // Send Mat4 data
 921             fgd_send_com( "B", FGFS_host);   // Recv Mat4 data
 922         }
 923     }
 924 #endif
 925
 926 #if defined( ENABLE_PLIB_JOYSTICK )
 927     // Read joystick and update control settings
 928     // if ( fgGetString("/sim/control-mode") == "joystick" )
 929     // {
 930     //    fgJoystickRead();
 931     // }
 932 #elif defined( ENABLE_GLUT_JOYSTICK )
 933     // Glut joystick support works by feeding a joystick handler
 934     // function to glut.  This is taken care of once in the joystick
 935     // init routine and we don't have to worry about it again.
 936 #endif
 937
 938 #ifdef FG_NEW_ENVIRONMENT
 939     globals->get_environment_mgr()->update(0);  // FIXME: use real delta time
 940 #endif
 941
 942     // Fix elevation.  I'm just sticking this here for now, it should
 943     // probably move eventually
 944
 945     /* printf("Before - ground = %.2f  runway = %.2f  alt = %.2f\n",
 946            scenery.get_cur_elev(),
 947            cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
 948            cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
 949
 950     if ( scenery.get_cur_elev() > -9990 && cur_fdm_state->get_inited() ) {
 951         if ( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER <
 952              (scenery.get_cur_elev() + alt_adjust_m - 3.0) ) {
 953             // now set aircraft altitude above ground
 954             printf("(*) Current Altitude = %.2f < %.2f forcing to %.2f\n",
 955                    cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 956                    scenery.get_cur_elev() + alt_adjust_m - 3.0,
 957                    scenery.get_cur_elev() + alt_adjust_m );
 958             cur_fdm_state->set_Altitude( scenery.get_cur_elev()
 959                                                 + alt_adjust_m );
 960
 961             SG_LOG( SG_ALL, SG_DEBUG,
 962                     "<*> resetting altitude to "
 963                     << cur_fdm_state->get_Altitude() * SG_FEET_TO_METER
 964                     << " meters" );
 965         }
 966     }
 967
 968     /* printf("Adjustment - ground = %.2f  runway = %.2f  alt = %.2f\n",
 969            scenery.get_cur_elev(),
 970            cur_fdm_state->get_Runway_altitude() * SG_FEET_TO_METER,
 971            cur_fdm_state->get_Altitude() * SG_FEET_TO_METER); */
 972
 973     // cout << "Warp = " << globals->get_warp() << endl;
 974
 975     // update "time"
 976     static bool last_clock_freeze = false;
 977
 978     if ( clock_freeze->getBoolValue() ) {
 979         // clock freeze requested
 980         if ( cur_time_override->getLongValue() == 0 ) {
 981             fgSetLong( "/sim/time/cur-time-override", t->get_cur_time() );
 982             globals->set_warp( 0 );
 983         }
 984     } else {
 985         // no clock freeze requested
 986         if ( last_clock_freeze == true ) {
 987             // clock just unfroze, let's set warp as the difference
 988             // between frozen time and current time so we don't get a
 989             // time jump (and corresponding sky object and lighting
 990             // jump.)
 991             globals->set_warp( cur_time_override->getLongValue() - time(NULL) );
 992             fgSetLong( "/sim/time/cur-time-override", 0 );
 993         }
 994         if ( globals->get_warp_delta() != 0 ) {
 995             globals->inc_warp( globals->get_warp_delta() );
 996         }
 997     }
 998
 999     last_clock_freeze = clock_freeze->getBoolValue();
1000
1001     t->update( longitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
1002                latitude->getDoubleValue() * SGD_DEGREES_TO_RADIANS,
1003                cur_time_override->getLongValue(),
1004                globals->get_warp() );
1005
1006     if ( globals->get_warp_delta() != 0 ) {
1007         fgUpdateSkyAndLightingParams();
1008     }
1009
1010     // update magvar model
1011     globals->get_mag()->update( longitude->getDoubleValue()
1012                                   * SGD_DEGREES_TO_RADIANS,
1013                                 latitude->getDoubleValue()
1014                                   * SGD_DEGREES_TO_RADIANS,
1015                                 altitude->getDoubleValue() * SG_FEET_TO_METER,
1016                                 globals->get_time_params()->getJD() );
1017
1018     // Get elapsed time (in usec) for this past frame
1019     elapsed = fgGetTimeInterval();
1020     SG_LOG( SG_ALL, SG_DEBUG,
1021             "Elapsed time interval is = " << elapsed
1022             << ", previous remainder is = " << remainder );
1023
1024     // Calculate frame rate average
1025 #ifdef FANCY_FRAME_COUNTER
1026     /* old fps calculation */
1027     if ( elapsed > 0 ) {
1028         double tmp;
1029         accum = 0.0;
1030         for ( i = FG_FRAME_RATE_HISTORY - 2; i >= 0; i-- ) {
1031             tmp = general.get_frame(i);
1032             accum += tmp;
1033             // printf("frame[%d] = %.2f\n", i, g->frames[i]);
1034             general.set_frame(i+1,tmp);
1035         }
1036         tmp = 1000000.0 / (float)elapsed;
1037         general.set_frame(0,tmp);
1038         // printf("frame[0] = %.2f\n", general.frames[0]);
1039         accum += tmp;
1040         general.set_frame_rate(accum / (float)FG_FRAME_RATE_HISTORY);
1041         // printf("ave = %.2f\n", general.frame_rate);
1042     }
1043 #else
1044     if ( (t->get_cur_time() != last_time) && (last_time > 0) ) {
1045         general.set_frame_rate( frames );
1046         SG_LOG( SG_ALL, SG_DEBUG,
1047                 "--> Frame rate is = " << general.get_frame_rate() );
1048         frames = 0;
1049     }
1050     last_time = t->get_cur_time();
1051     ++frames;
1052 #endif
1053
1054     // Run ATC subsystem
1055     globals->get_ATC_mgr()->update(1);  // FIXME - use real dt.
1056
1057     // Run the AI subsystem
1058     globals->get_AI_mgr()->update(1);   // FIXME - use real dt.
1059
1060     // Run flight model
1061
1062     // Calculate model iterations needed for next frame
1063     elapsed += remainder;
1064
1065     global_multi_loop = (long)(((double)elapsed * 0.000001) *
1066                               fgGetInt("/sim/model-hz"));
1067     remainder = elapsed - ( (global_multi_loop*1000000) /
1068                             fgGetInt("/sim/model-hz") );
1069     SG_LOG( SG_ALL, SG_DEBUG,
1070             "Model iterations needed = " << global_multi_loop
1071             << ", new remainder = " << remainder );
1072
1073     // chop max interations to something reasonable if the sim was
1074     // delayed for an excesive amount of time
1075     if ( global_multi_loop > 2.0 * fgGetInt("/sim/model-hz") ) {
1076         global_multi_loop = (int)(2.0 * fgGetInt("/sim/model-hz") );
1077         remainder = 0;
1078     }
1079
1080     // flight model
1081     if ( global_multi_loop > 0 ) {
1082         fgUpdateTimeDepCalcs();
1083     } else {
1084         SG_LOG( SG_ALL, SG_DEBUG,
1085                 "Elapsed time is zero ... we're zinging" );
1086     }
1087
1088 #if ! defined( macintosh )
1089     // Do any I/O channel work that might need to be done
1090     fgIOProcess();
1091 #endif
1092
1093     // see if we need to load any new scenery tiles
1094     global_tile_mgr.update( longitude->getDoubleValue(),
1095                             latitude->getDoubleValue() );
1096
1097     // see if we need to load any deferred-load textures
1098     material_lib.load_next_deferred();
1099
1100     // Process/manage pending events
1101     global_events.Process();
1102
1103     // Run audio scheduler
1104 #ifdef ENABLE_AUDIO_SUPPORT
1105     if ( fgGetBool("/sim/sound/audible")
1106            && globals->get_soundmgr()->is_working() ) {
1107         globals->get_fx()->update(1); // FIXME: use dt
1108         globals->get_soundmgr()->update(1); // FIXME: use dt
1109     }
1110 #endif
1111
1112     // redraw display
1113     fgRenderFrame();
1114
1115     SG_LOG( SG_ALL, SG_DEBUG, "" );
1116 }
1117
1118
1119 // This is the top level master main function that is registered as
1120 // our idle funciton
1121 //
1122
1123 // The first few passes take care of initialization things (a couple
1124 // per pass) and once everything has been initialized fgMainLoop from
1125 // then on.
1126
1127 static void fgIdleFunction ( void ) {
1128     // printf("idle state == %d\n", idle_state);
1129
1130     if ( idle_state == 0 ) {
1131         // Initialize the splash screen right away
1132         if ( fgGetBool("/sim/startup/splash-screen") ) {
1133             fgSplashInit();
1134         }
1135
1136         idle_state++;
1137     } else if ( idle_state == 1 ) {
1138         // Initialize audio support
1139 #ifdef ENABLE_AUDIO_SUPPORT
1140
1141         // Start the intro music
1142         if ( fgGetBool("/sim/startup/intro-music") ) {
1143             SGPath mp3file( globals->get_fg_root() );
1144             mp3file.append( "Sounds/intro.mp3" );
1145
1146             SG_LOG( SG_GENERAL, SG_INFO,
1147                     "Starting intro music: " << mp3file.str() );
1148
1149 #if defined( __CYGWIN__ )
1150             string command = "start /m `cygpath -w " + mp3file.str() + "`";
1151 #elif defined( WIN32 )
1152             string command = "start /m " + mp3file.str();
1153 #else
1154             string command = "mpg123 " + mp3file.str() + "> /dev/null 2>&1";
1155 #endif
1156
1157             system ( command.c_str() );
1158         }
1159
1160 #endif
1161
1162         idle_state++;
1163     } else if ( idle_state == 2 ) {
1164         // These are a few miscellaneous things that aren't really
1165         // "subsystems" but still need to be initialized.
1166
1167 #ifdef USE_GLIDE
1168         if ( strstr ( general.get_glRenderer(), "Glide" ) ) {
1169             grTexLodBiasValue ( GR_TMU0, 1.0 ) ;
1170         }
1171 #endif
1172
1173         idle_state++;
1174     } else if ( idle_state == 3 ) {
1175         // This is the top level init routine which calls all the
1176         // other subsystem initialization routines.  If you are adding
1177         // a subsystem to flightgear, its initialization call should
1178         // located in this routine.
1179         if( !fgInitSubsystems()) {
1180             SG_LOG( SG_GENERAL, SG_ALERT,
1181                     "Subsystem initializations failed ..." );
1182             exit(-1);
1183         }
1184
1185         idle_state++;
1186     } else if ( idle_state == 4 ) {
1187         // setup OpenGL view parameters
1188         fgInitVisuals();
1189
1190         idle_state++;
1191     } else if ( idle_state == 5 ) {
1192
1193         idle_state++;
1194     } else if ( idle_state == 6 ) {
1195         // sleep(1);
1196         idle_state = 1000;
1197
1198         cout << "Panel visible = " << fgPanelVisible() << endl;
1199         fgReshape( fgGetInt("/sim/startup/xsize"),
1200                    fgGetInt("/sim/startup/ysize") );
1201     }
1202
1203     if ( idle_state == 1000 ) {
1204         // We've finished all our initialization steps, from now on we
1205         // run the main loop.
1206
1207         fgMainLoop();
1208     } else {
1209         if ( fgGetBool("/sim/startup/splash-screen") ) {
1210             fgSplashUpdate(0.0);
1211         }
1212     }
1213 }
1214
1215 // options.cxx needs to see this for toggle_panel()
1216 // Handle new window size or exposure
1217 void fgReshape( int width, int height ) {
1218     int view_h;
1219
1220     if ( (!fgGetBool("/sim/virtual-cockpit"))
1221          && fgPanelVisible() && idle_state == 1000 ) {
1222         view_h = (int)(height * (current_panel->getViewHeight() -
1223                                  current_panel->getYOffset()) / 768.0);
1224     } else {
1225         view_h = height;
1226     }
1227
1228     // for all views
1229     for ( int i = 0; i < globals->get_viewmgr()->size(); ++i ) {
1230         globals->get_viewmgr()->get_view(i)->
1231             set_aspect_ratio((float)view_h / (float)width);
1232     }
1233
1234     glViewport( 0, (GLint)(height - view_h), (GLint)(width), (GLint)(view_h) );
1235
1236     fgSetInt("/sim/startup/xsize", width);
1237     fgSetInt("/sim/startup/ysize", height);
1238     guiInitMouse(width, height);
1239
1240     ssgSetFOV( globals->get_current_view()->get_h_fov(),
1241                globals->get_current_view()->get_v_fov() );
1242
1243     fgHUDReshape();
1244 }
1245
1246
1247 // Initialize GLUT and define a main window
1248 int fgGlutInit( int *argc, char **argv ) {
1249
1250 #if !defined( macintosh )
1251     // GLUT will extract all glut specific options so later on we only
1252     // need wory about our own.
1253     glutInit(argc, argv);
1254 #endif
1255
1256     // Define Display Parameters
1257     glutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
1258
1259     SG_LOG( SG_GENERAL, SG_INFO, "Opening a window: " <<
1260             fgGetInt("/sim/startup/xsize") << "x"
1261             << fgGetInt("/sim/startup/ysize") );
1262
1263     // Define initial window size
1264     glutInitWindowSize( fgGetInt("/sim/startup/xsize"),
1265                         fgGetInt("/sim/startup/ysize") );
1266
1267     // Initialize windows
1268     if ( !fgGetBool("/sim/startup/game-mode")) {
1269         // Open the regular window
1270         glutCreateWindow("FlightGear");
1271 #ifndef GLUT_WRONG_VERSION
1272     } else {
1273         // Open the cool new 'game mode' window
1274         char game_mode_str[256];
1275         sprintf( game_mode_str, "width=%d height=%d bpp=%d",
1276                  fgGetInt("/sim/startup/xsize"),
1277                  fgGetInt("/sim/startup/ysize"),
1278                  fgGetInt("/sim/rendering/bits-per-pixel"));
1279
1280         SG_LOG( SG_GENERAL, SG_INFO,
1281                 "game mode params = " << game_mode_str );
1282         glutGameModeString( game_mode_str );
1283         glutEnterGameMode();
1284 #endif
1285     }
1286
1287     // This seems to be the absolute earliest in the init sequence
1288     // that these calls will return valid info.  Too bad it's after
1289     // we've already created and sized out window. :-(
1290     general.set_glVendor( (char *)glGetString ( GL_VENDOR ) );
1291     general.set_glRenderer( (char *)glGetString ( GL_RENDERER ) );
1292     general.set_glVersion( (char *)glGetString ( GL_VERSION ) );
1293     SG_LOG( SG_GENERAL, SG_INFO, general.get_glRenderer() );
1294
1295     GLint tmp;
1296     glGetIntegerv( GL_MAX_TEXTURE_SIZE, &tmp );
1297     general.set_glMaxTexSize( tmp );
1298     SG_LOG ( SG_GENERAL, SG_INFO, "Max texture size = " << tmp );
1299
1300     glGetIntegerv( GL_DEPTH_BITS, &tmp );
1301     general.set_glDepthBits( tmp );
1302     SG_LOG ( SG_GENERAL, SG_INFO, "Depth buffer bits = " << tmp );
1303
1304     return 1;
1305 }
1306
1307
1308 // Initialize GLUT event handlers
1309 int fgGlutInitEvents( void ) {
1310     // call fgReshape() on window resizes
1311     glutReshapeFunc( fgReshape );
1312
1313     // keyboard and mouse callbacks are set in FGInput::init
1314
1315 #ifndef FG_NEW_MOUSE
1316     // call guiMouseFunc() whenever our little rodent is used
1317     glutMouseFunc ( guiMouseFunc );
1318     glutMotionFunc (guiMotionFunc );
1319     glutPassiveMotionFunc (guiMotionFunc );
1320 #endif
1321
1322     // call fgMainLoop() whenever there is
1323     // nothing else to do
1324     glutIdleFunc( fgIdleFunction );
1325
1326     // draw the scene
1327     glutDisplayFunc( fgRenderFrame );
1328
1329     return 1;
1330 }
1331
1332
1333 // Main loop
1334 int mainLoop( int argc, char **argv ) {
1335
1336 #if defined( macintosh )
1337     freopen ("stdout.txt", "w", stdout );
1338     freopen ("stderr.txt", "w", stderr );
1339     argc = ccommand( &argv );
1340 #endif
1341
1342     // set default log levels
1343     sglog().setLogLevels( SG_ALL, SG_INFO );
1344
1345     string version;
1346 #ifdef FLIGHTGEAR_VERSION
1347     version = FLIGHTGEAR_VERSION;
1348 #else
1349     version = "unknown version";
1350 #endif
1351     SG_LOG( SG_GENERAL, SG_INFO, "FlightGear:  Version "
1352             << version << endl );
1353
1354     // Allocate global data structures.  This needs to happen before
1355     // we parse command line options
1356
1357     globals = new FGGlobals;
1358
1359 #if defined(FG_NEW_ENVIRONMENT)
1360     globals->set_environment_mgr(new FGEnvironmentMgr);
1361 #endif
1362
1363     // seed the random number generater
1364     sg_srandom_time();
1365
1366     SGRoute *route = new SGRoute;
1367     globals->set_route( route );
1368
1369     FGControls *controls = new FGControls;
1370     globals->set_controls( controls );
1371
1372     FGViewMgr *viewmgr = new FGViewMgr;
1373     globals->set_viewmgr( viewmgr );
1374     viewmgr->init();
1375     viewmgr->bind();
1376
1377     string_list *col = new string_list;
1378     globals->set_channel_options_list( col );
1379
1380     // Scan the config file(s) and command line options to see if
1381     // fg_root was specified (ignore all other options for now)
1382     fgInitFGRoot(argc, argv);
1383
1384     // Check for the correct base package version
1385     string base_version = fgBasePackageVersion();
1386     if ( !(base_version == "0.7.9") ) {
1387         // tell the operator how to use this application
1388         fgUsage();
1389
1390         SG_LOG( SG_GENERAL, SG_ALERT, "Base package check failed ... "
1391                 << "Found version " << base_version << " at: "
1392                 << globals->get_fg_root() );
1393         SG_LOG( SG_GENERAL, SG_ALERT, "Please upgrade to version 0.7.9" );
1394         exit(-1);
1395     }
1396
1397     // Initialize the Aircraft directory to "" (UIUC)
1398     aircraft_dir = "";
1399
1400     // Load the configuration parameters
1401     if ( !fgInitConfig(argc, argv) ) {
1402         SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
1403         exit(-1);
1404     }
1405
1406     // Initialize the Window/Graphics environment.
1407     if( !fgGlutInit(&argc, argv) ) {
1408         SG_LOG( SG_GENERAL, SG_ALERT, "GLUT initialization failed ..." );
1409         exit(-1);
1410     }
1411
1412     // Initialize the various GLUT Event Handlers.
1413     if( !fgGlutInitEvents() ) {
1414         SG_LOG( SG_GENERAL, SG_ALERT,
1415                 "GLUT event handler initialization failed ..." );
1416         exit(-1);
1417     }
1418
1419     // Initialize plib net interface
1420     netInit( &argc, argv );
1421
1422     // Initialize ssg (from plib).  Needs to come before we do any
1423     // other ssg stuff, but after opengl/glut has been initialized.
1424     ssgInit();
1425
1426     // Initialize the user interface (we need to do this before
1427     // passing off control to glut and before fgInitGeneral to get our
1428     // fonts !!!
1429     guiInit();
1430
1431 #ifdef GL_EXT_texture_lod_bias
1432     glTexEnvf( GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, -0.5 ) ;
1433 #endif
1434
1435     // Set position relative to glide slope if requested
1436     fgSetPosFromGlideSlope();
1437
1438     // set current_options lon/lat if an airport id is specified
1439     // cout << "3. airport_id = " << fgGetString("/sim/startup/airport-id") << endl;
1440     if ( fgGetString("/sim/startup/airport-id")[0] != '\0' ) {
1441         // fgSetPosFromAirportID( fgGetString("/sim/startup/airport-id") );
1442         fgSetPosFromAirportIDandHdg( fgGetString("/sim/startup/airport-id"),
1443                                      fgGetDouble("/orientation/heading-deg") );
1444     }
1445
1446     SGTime *t = fgInitTime();
1447     globals->set_time_params( t );
1448
1449     // Do some quick general initializations
1450     if( !fgInitGeneral()) {
1451         SG_LOG( SG_GENERAL, SG_ALERT,
1452                 "General initializations failed ..." );
1453         exit(-1);
1454     }
1455
1456     SGPath modelpath( globals->get_fg_root() );
1457     ssgModelPath( (char *)modelpath.c_str() );
1458
1459     // Scene graph root
1460     scene = new ssgRoot;
1461     scene->setName( "Scene" );
1462
1463     // Scene graph root for cockpit
1464     cockpit = new ssgRoot;
1465     cockpit->setName( "Cockpit" );
1466
1467     lighting = new ssgRoot;
1468     lighting->setName( "Lighting" );
1469
1470     // Initialize the sky
1471     SGPath ephem_data_path( globals->get_fg_root() );
1472     ephem_data_path.append( "Astro" );
1473     SGEphemeris *ephem = new SGEphemeris( ephem_data_path.c_str() );
1474     ephem->update( globals->get_time_params()->getMjd(),
1475                    globals->get_time_params()->getLst(),
1476                    0.0 );
1477     globals->set_ephem( ephem );
1478
1479     thesky = new SGSky;
1480
1481     SGPath sky_tex_path( globals->get_fg_root() );
1482     sky_tex_path.append( "Textures" );
1483     sky_tex_path.append( "Sky" );
1484     thesky->texture_path( sky_tex_path.str() );
1485
1486     thesky->build( 550.0, 550.0,
1487                    globals->get_ephem()->getNumPlanets(),
1488                    globals->get_ephem()->getPlanets(), 60000.0,
1489                    globals->get_ephem()->getNumStars(),
1490                    globals->get_ephem()->getStars(), 60000.0 );
1491
1492     if ( fgGetBool("/environment/clouds/status") ) {
1493         // thesky->add_cloud_layer( 2000.0, 200.0, 50.0, 40000.0,
1494         //                          SG_CLOUD_OVERCAST );
1495         thesky->add_cloud_layer( fgGetDouble("/environment/clouds/altitude-ft") *
1496                                  SG_FEET_TO_METER,
1497                                  200.0, 50.0, 40000.0,
1498                                  SG_CLOUD_MOSTLY_CLOUDY );
1499         // thesky->add_cloud_layer( 3000.0, 200.0, 50.0, 40000.0,
1500         //                          SG_CLOUD_MOSTLY_SUNNY );
1501         thesky->add_cloud_layer( 6000.0, 20.0, 10.0, 40000.0,
1502                                  SG_CLOUD_CIRRUS );
1503     }
1504
1505     // Initialize MagVar model
1506     SGMagVar *magvar = new SGMagVar();
1507     globals->set_mag( magvar );
1508
1509     // Terrain branch
1510     terrain_branch = new ssgBranch;
1511     terrain_branch->setName( "Terrain" );
1512     scene->addKid( terrain_branch );
1513
1514     // Lighting
1515     gnd_lights_branch = new ssgBranch;
1516     gnd_lights_branch->setName( "Ground Lighting" );
1517     lighting->addKid( gnd_lights_branch );
1518
1519     rwy_lights_branch = new ssgBranch;
1520     rwy_lights_branch->setName( "Runway Lighting" );
1521     lighting->addKid( rwy_lights_branch );
1522
1523     // airport = new ssgBranch;
1524     // airport->setName( "Airport Lighting" );
1525     // lighting->addKid( airport );
1526
1527     // ADA
1528     fgLoadDCS();
1529     // ADA
1530
1531     // temporary visible aircraft "own ship"
1532     current_model.init();
1533
1534 #ifdef FG_NETWORK_OLK
1535     // Do the network intialization
1536     if ( fgGetBool("/sim/networking/network-olk") ) {
1537         printf("Multipilot mode %s\n", fg_net_init( scene ) );
1538     }
1539 #endif
1540
1541     // build our custom render states
1542     fgBuildRenderStates();
1543
1544     // pass control off to the master GLUT event handler
1545     glutMainLoop();
1546
1547     // we never actually get here ... but to avoid compiler warnings,
1548     // etc.
1549     return 0;
1550 }
1551
1552
1553 // $$$ end - added VS Renganathan, 15 Oct 2K
1554 //         - added Venky         , 12 Nov 2K
1555
1556 #if defined(__linux__) && defined(__i386__)
1557
1558 static void handleFPE (int);
1559
1560 static void
1561 initFPE ()
1562 {
1563     fpu_control_t fpe_flags = 0;
1564     _FPU_GETCW(fpe_flags);
1565 //     fpe_flags &= ~_FPU_MASK_IM;      // invalid operation
1566 //     fpe_flags &= ~_FPU_MASK_DM;      // denormalized operand
1567 //     fpe_flags &= ~_FPU_MASK_ZM;      // zero-divide
1568 //     fpe_flags &= ~_FPU_MASK_OM;      // overflow
1569 //     fpe_flags &= ~_FPU_MASK_UM;      // underflow
1570 //     fpe_flags &= ~_FPU_MASK_PM;      // precision (inexact result)
1571     _FPU_SETCW(fpe_flags);
1572     signal(SIGFPE, handleFPE);
1573 }
1574
1575 static void
1576 handleFPE (int num)
1577 {
1578   initFPE();
1579   SG_LOG(SG_GENERAL, SG_ALERT, "Floating point interrupt (SIGFPE)");
1580 }
1581 #endif
1582
1583 // Main entry point; catch any exceptions that have made it this far.
1584 int main ( int argc, char **argv ) {
1585
1586     // Enable floating-point exceptions for Linux/x86
1587 #if defined(__linux__) && defined(__i386__)
1588     initFPE();
1589 #endif
1590
1591     // Enable floating-point exceptions for Windows
1592 #if defined( _MSC_VER ) && defined( DEBUG )
1593     // Christian, we should document what this does
1594     _control87( _EM_INEXACT, _MCW_EM );
1595 #endif
1596
1597 #if defined( HAVE_BC5PLUS )
1598     _control87(MCW_EM, MCW_EM);  /* defined in float.h */
1599 #endif
1600
1601     // FIXME: add other, more specific
1602     // exceptions.
1603     try {
1604         mainLoop(argc, argv);
1605     } catch (sg_throwable &t) {
1606                                 // We must use cerr rather than
1607                                 // logging, since logging may be
1608                                 // disabled.
1609         cerr << "Fatal error: " << t.getFormattedMessage()
1610              << "\n (received from " << t.getOrigin() << ')' << endl;
1611         exit(1);
1612     }
1613
1614     return 0;
1615 }
1616
1617
1618 void fgLoadDCS(void) {
1619
1620     ssgEntity *ship_obj = NULL;
1621
1622     char obj_filename[25];
1623
1624     for ( int k = 0; k < 32; k++ ) {
1625         ship_pos[k]=NULL;
1626     }
1627
1628     SGPath tile_path( globals->get_fg_root());
1629     tile_path.append( "Scenery" );
1630     tile_path.append( "Objects.txt" );
1631     sg_gzifstream in( tile_path.str() );
1632     if ( ! in.is_open() ) {
1633         SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: " << tile_path.str() );
1634     } else {
1635
1636         SGPath modelpath( globals->get_fg_root() );
1637         modelpath.append( "Models" );
1638         modelpath.append( "Geometry" );
1639
1640         SGPath texturepath( globals->get_fg_root() );
1641         texturepath.append( "Models" );
1642         texturepath.append( "Textures" );
1643
1644         ssgModelPath( (char *)modelpath.c_str() );
1645         ssgTexturePath( (char *)texturepath.c_str() );
1646
1647         ship_sel = new ssgSelector;
1648
1649         char c;
1650         while ( ! in.eof() ) {
1651             in >> ::skipws;
1652             if ( in.get( c ) && c == '#' ) {
1653                 in >> skipeol;
1654             } else {
1655                 in.putback(c);
1656                 in >> obj_filename >> obj_lat[objc] >> obj_lon[objc] >> obj_alt[objc];
1657                 /* cout << endl << obj_filename << " " << obj_lat[objc] << " " << obj_lon[objc] <<  " " << obj_alt[objc] << endl;
1658                    int chj=getchar();*/
1659
1660                 obj_lon[objc] *=SGD_DEGREES_TO_RADIANS;
1661                 obj_lat[objc] *=SGD_DEGREES_TO_RADIANS;
1662
1663                 ship_pos[objc] = new ssgTransform;
1664
1665                 // type "repeat" in objects.txt to load one more
1666                 // instance of the last object.
1667
1668                 if ( strcmp(obj_filename,"repeat") != 0) {
1669                     ship_obj = ssgLoad( obj_filename );
1670                 }
1671
1672                 if ( ship_obj != NULL ) {
1673                                         ship_obj->setName(obj_filename);
1674                                 if (objc == 0)
1675                                                 ship_obj->clrTraversalMaskBits( SSGTRAV_HOT );
1676                                         else
1677                                                 ship_obj->setTraversalMaskBits( SSGTRAV_HOT );
1678                     ship_pos[objc]->addKid( ship_obj ); // add object to transform node
1679                     ship_sel->addKid( ship_pos[objc] ); // add transform node to selector
1680                     SG_LOG( SG_TERRAIN, SG_ALERT, "Loaded file: "
1681                             << obj_filename );
1682                 } else {
1683                     SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: "
1684                             << obj_filename );
1685                 }
1686
1687                                 // temporary hack for deck lights - ultimately should move to PLib (when??)
1688                                 //const char *extn = file_extension ( obj_filename ) ;
1689                                 if ( objc == 1 ){
1690                                     ssgVertexArray *lights = new ssgVertexArray( 100 );
1691                                         ssgVertexArray *lightpoints = new ssgVertexArray( 100 );
1692                                         ssgVertexArray *lightnormals = new ssgVertexArray( 100 );
1693                                         ssgVertexArray *lightdir = new ssgVertexArray( 100 );
1694                                         int ltype[500], light_type;
1695                                         static int ltcount = 0;
1696                                     string token;
1697                                         sgVec3 rway_dir,rway_normal,lightpt;
1698                                         Point3D node;
1699                                         modelpath.append(obj_filename);
1700                                         sg_gzifstream in1( modelpath.str() );
1701                                         if ( ! in1.is_open() ) {
1702                                                 SG_LOG( SG_TERRAIN, SG_ALERT, "Cannot open file: " << modelpath.str() );
1703                                         } else {
1704                                                 while ( ! in1.eof() ) {
1705                                                         in1 >> ::skipws;
1706                                                         if ( in1.get( c ) && c == '#' ) {
1707                                                                 in1 >> skipeol;
1708                                                         } else {
1709                                                                 in1.putback(c);
1710                                                                 in1 >> token;
1711                                                                 //cout << token << endl;
1712                                                                 if ( token == "runway" ) {
1713                                                                         in1 >> node;
1714                                                                         sgSetVec3 (rway_dir, node[0], node[1], node[2] );
1715                                                                 } else if ( token == "edgelight" ) {
1716                                                                         in1 >> node;
1717                                                                         sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1718                                                                         light_type = 1;
1719                                                                 } else if ( token == "taxi" ) {
1720                                                                         in1 >> node;
1721                                                                         sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1722                                                                         light_type = 2;
1723                                                                 } else if ( token == "vasi" ) {
1724                                                                         in1 >> node;
1725                                                                         sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1726                                                                         light_type = 3;
1727                                                                 } else if ( token == "threshold" ) {
1728                                                                         in1 >> node;
1729                                                                         sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1730                                                                         light_type = 4;
1731                                                                 } else if ( token == "rabbit" ) {
1732                                                                         in1 >> node;
1733                                                                         sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1734                                                                         light_type = 5;
1735                                                                 } else if ( token == "ols" ) {
1736                                                                         in1 >> node;
1737                                                                         sgSetVec3 (rway_ols, node[0], node[1], node[2] );
1738                                                                         light_type = 6;
1739                                                                 } else if ( token == "red" ) {
1740                                                                         in1 >> node;
1741                                                                         sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1742                                                                         light_type = 7;
1743                                                                 } else if ( token == "green" ) {
1744                                                                         in1 >> node;
1745                                                                         sgSetVec3 (rway_normal, node[0], node[1], node[2] );
1746                                                                         light_type = 8;
1747                                                                 } else if ( token == "lp" ) {
1748                                                                         in1 >> node;
1749                                                                         sgSetVec3 (lightpt, node[0], node[1], node[2] );
1750                                                                         lightpoints->add( lightpt );
1751                                                                         lightnormals->add( rway_normal );
1752                                                                         lightdir->add( rway_dir );
1753                                                                         ltype[ltcount]= light_type;
1754                                                                         ltcount++;
1755                                                                 }
1756                                                                 if (in1.eof()) break;
1757                                                         }
1758                                                 }  //while
1759
1760                                                 if ( lightpoints->getNum() ) {
1761                                                         ssgBranch *lightpoints_branch;
1762                                                         long int dummy = -999;
1763                                                         dummy_tile = new FGTileEntry((SGBucket)dummy);
1764                                                         dummy_tile->lightmaps_sequence = new ssgSelector;
1765                                                         dummy_tile->ols_transform = new ssgTransform;
1766
1767                                                         // call function to generate the runway lights
1768                                                         lightpoints_branch =
1769                                                         dummy_tile->gen_runway_lights( lightpoints, lightnormals,
1770                                                                                                                                 lightdir, ltype);
1771                                                         lightpoints_brightness->addKid(lightpoints_branch);
1772                                                         lightpoints_transform->addKid(lightpoints_brightness);
1773                                                     //dummy_tile->lightmaps_sequence->setTraversalMaskBits( SSGTRAV_HOT );
1774                                                         lightpoints_transform->addKid( dummy_tile->lightmaps_sequence );
1775                                                         lightpoints_transform->ref();
1776                                                         gnd_lights_branch->addKid( lightpoints_transform );
1777                                                 }
1778                                         } //if in1
1779                 } //if objc
1780                                 // end hack for deck lights
1781
1782                 objc++;
1783
1784                 if (in.eof()) break;
1785             }
1786         } // while
1787
1788         SG_LOG ( SG_TERRAIN, SG_ALERT, "Finished object processing." );
1789
1790         terrain_branch->addKid( ship_sel ); //add selector node to root node
1791     }
1792
1793     return;
1794  }
1795
1796
1797 void fgUpdateDCS (void) {
1798
1799     // double eye_lat,eye_lon,eye_alt;
1800     // static double obj_head;
1801     double sl_radius,obj_latgc;
1802     // float nresultmat[4][4];
1803     // sgMat4 Trans,rothead,rotlon,rot180,rotlat,resultmat1,resultmat2,resultmat3;
1804     double bz[3];
1805
1806     // Instantaneous Geodetic Lat/Lon/Alt of moving object
1807     FGADA *fdm = (FGADA *)current_aircraft.fdm_state;
1808
1809     // Deck should be the first object in objects.txt in case of fdm=ada
1810
1811     if (!strcmp(fgGetString("/sim/flight-model"), "ada")) {
1812                 if ((fdm->get_iaux(1))==1)
1813                 {
1814                         obj_lat[1] = fdm->get_daux(1)*SGD_DEGREES_TO_RADIANS;
1815                         obj_lon[1] = fdm->get_daux(2)*SGD_DEGREES_TO_RADIANS;
1816                         obj_alt[1] = fdm->get_daux(3);
1817                         obj_pitch[1] = fdm->get_faux(1);
1818                         obj_roll[1] = fdm->get_faux(2);
1819                 }
1820     }
1821
1822     for ( int m = 0; m < objc; m++ ) {
1823         //cout << endl <<  obj_lat[m]*SGD_RADIANS_TO_DEGREES << " " << obj_lon[m]*SGD_RADIANS_TO_DEGREES << " " << obj_alt[m] << " " << objc << endl;
1824         //int v=getchar();
1825
1826         //Geodetic to Geocentric angles for rotation
1827         sgGeodToGeoc(obj_lat[m],obj_alt[m],&sl_radius,&obj_latgc);
1828
1829         //moving object gbs-posn in cartesian coords
1830         Point3D obj_posn = Point3D( obj_lon[m],obj_lat[m],obj_alt[m]);
1831         Point3D obj_pos = sgGeodToCart( obj_posn );
1832
1833         // Translate moving object w.r.t eye
1834         Point3D Objtrans = obj_pos-scenery.get_center();
1835         bz[0]=Objtrans.x();
1836         bz[1]=Objtrans.y();
1837         bz[2]=Objtrans.z();
1838
1839        // rotate dynamic objects for lat,lon & alt and other motion about its axes
1840
1841         sgMat4 sgTRANS;
1842         sgMakeTransMat4( sgTRANS, bz[0],bz[1],bz[2]);
1843
1844         sgVec3 ship_fwd,ship_rt,ship_up;
1845         sgSetVec3( ship_fwd, 1.0, 0.0, 0.0);//east,roll
1846         sgSetVec3( ship_rt, 0.0, 1.0, 0.0);//up,pitch
1847         sgSetVec3( ship_up, 0.0, 0.0, 1.0); //north,yaw
1848
1849         sgMat4 sgROT_lon, sgROT_lat, sgROT_hdg, sgROT_pitch, sgROT_roll;
1850         sgMakeRotMat4( sgROT_lon, obj_lon[m]*SGD_RADIANS_TO_DEGREES, ship_up );
1851         sgMakeRotMat4( sgROT_lat, 90-obj_latgc*SGD_RADIANS_TO_DEGREES, ship_rt );
1852         sgMakeRotMat4( sgROT_hdg, 180.0, ship_up );
1853         sgMakeRotMat4( sgROT_pitch, obj_pitch[m], ship_rt );
1854         sgMakeRotMat4( sgROT_roll, obj_roll[m], ship_fwd );
1855
1856         sgMat4 sgTUX;
1857         sgCopyMat4( sgTUX, sgROT_hdg );
1858         sgPostMultMat4( sgTUX, sgROT_pitch );
1859         sgPostMultMat4( sgTUX, sgROT_roll );
1860         sgPostMultMat4( sgTUX, sgROT_lat );
1861         sgPostMultMat4( sgTUX, sgROT_lon );
1862         sgPostMultMat4( sgTUX, sgTRANS );
1863
1864         sgCoord shippos;
1865         sgSetCoord(&shippos, sgTUX );
1866         ship_pos[m]->setTransform( &shippos );
1867         // temporary hack for deck lights - ultimately should move to PLib (when ??)
1868         if (m == 1) {
1869                 if (lightpoints_transform) {
1870                         lightpoints_transform->setTransform( &shippos );
1871                         float sun_angle = cur_light_params.sun_angle * SGD_RADIANS_TO_DEGREES;
1872                         if ( sun_angle > 89 ) {
1873                                 lightpoints_brightness->select(0x01);
1874                         } else {
1875                                 lightpoints_brightness->select(0x00);
1876                         }
1877                 }
1878
1879                 float elev;
1880                 sgVec3 rp,to;
1881                 float *vp;
1882                 float alt;
1883                 float ref_elev;
1884                 sgXformPnt3( rp, rway_ols, sgTUX );
1885                 vp = globals->get_current_view()->get_view_pos();
1886             to[0] = rp[0]-vp[0];
1887             to[1] = rp[1]-vp[1];
1888             to[2] = rp[2]-vp[2];
1889                 float dist = sgLengthVec3( to );
1890                 alt = (current_aircraft.fdm_state->get_Altitude() * SG_FEET_TO_METER)-rway_ols[2];
1891
1892                 elev = asin(alt/dist)*SGD_RADIANS_TO_DEGREES;
1893
1894             ref_elev = elev - 3.75; // +ve above, -ve below
1895
1896                 unsigned int sel;
1897                 sel = 0xFF;
1898 // DO NOT DELETE THIS CODE - This is to compare a discrete FLOLS (without LOD) with analog FLOLS
1899 //              if (ref_elev > 0.51) sel = 0x21;
1900 //              if ((ref_elev <= 0.51) & (ref_elev > 0.17)) sel = 0x22;
1901 //              if ((ref_elev <= 0.17) & (ref_elev >= -0.17)) sel = 0x24;
1902 //              if ((ref_elev < -0.17) & (ref_elev >= -0.51)) sel = 0x28;
1903 //              if (ref_elev < -0.51) sel = 0x30;
1904 // DO NOT DELETE THIS CODE - This is to compare a discrete FLOLS (without LOD) with analog FLOLS
1905                 dummy_tile->lightmaps_sequence->select(sel);
1906
1907                 sgVec3 up;
1908                 sgCopyVec3 (up, ship_up);
1909                 if (dist > 750)
1910                         sgScaleVec3 (up, 4.0*ref_elev*dist/750.0);
1911                 else
1912                         sgScaleVec3 (up, 4.0*ref_elev);
1913                 dummy_tile->ols_transform->setTransform(up);
1914                 //cout << "ref_elev  " << ref_elev << endl;
1915         }
1916     // end hack for deck lights
1917
1918     }
1919     if ( ship_sel != NULL ) {
1920         ship_sel->select(0xFFFFFFFE); // first object is ownship, added to acmodel
1921     }
1922 }
1923
1924 // $$$ end - added VS Renganathan, 15 Oct 2K
1925 //           added Venky         , 12 Nov 2K
1926
1927