src/Main/renderer.cxx

   1 // renderer.cxx -- top level sim routines
   2 //
   3 // Written by Curtis Olson, started May 1997.
   4 // This file contains parts of main.cxx prior to october 2004
   5 //
   6 // Copyright (C) 1997 - 2002  Curtis L. Olson  - curt@flightgear.org
   7 //
   8 // This program is free software; you can redistribute it and/or
   9 // modify it under the terms of the GNU General Public License as
  10 // published by the Free Software Foundation; either version 2 of the
  11 // License, or (at your option) any later version.
  12 //
  13 // This program is distributed in the hope that it will be useful, but
  14 // WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 // General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 //
  22 // $Id$
  23
  24
  25 #ifdef HAVE_CONFIG_H
  26 #  include <config.h>
  27 #endif
  28
  29 #include <simgear/compiler.h>
  30
  31 #ifdef HAVE_WINDOWS_H
  32 #  include <windows.h>
  33 #endif
  34
  35 #include <plib/ssg.h>
  36 #include <plib/netSocket.h>
  37
  38 #include <simgear/screen/extensions.hxx>
  39 #include <simgear/scene/material/matlib.hxx>
  40 #include <simgear/props/props.hxx>
  41 #include <simgear/timing/sg_time.hxx>
  42 #include <simgear/scene/model/animation.hxx>
  43 #include <simgear/ephemeris/ephemeris.hxx>
  44 #include <simgear/scene/model/placement.hxx>
  45 #include <simgear/math/sg_random.h>
  46 #include <simgear/scene/model/modellib.hxx>
  47 #include <simgear/scene/model/model.hxx>
  48
  49 #ifdef FG_USE_CLOUDS_3D
  50 #  include <simgear/scene/sky/clouds3d/SkySceneLoader.hpp>
  51 #  include <simgear/scene/sky/clouds3d/SkyUtil.hpp>
  52 #endif
  53
  54 #include <Scenery/tileentry.hxx>
  55 #include <Time/light.hxx>
  56 #include <Time/light.hxx>
  57 #include <Aircraft/aircraft.hxx>
  58 #include <Cockpit/panel.hxx>
  59 #include <Cockpit/cockpit.hxx>
  60 #include <Cockpit/radiostack.hxx>
  61 #include <Cockpit/hud.hxx>
  62 #include <Model/panelnode.hxx>
  63 #include <Model/modelmgr.hxx>
  64 #include <Model/acmodel.hxx>
  65 #include <Scenery/scenery.hxx>
  66 #include <Scenery/tilemgr.hxx>
  67 #include <ATC/ATCdisplay.hxx>
  68 #include <Replay/replay.hxx>
  69 #include <GUI/new_gui.hxx>
  70
  71 #ifdef FG_MPLAYER_AS
  72 #include <MultiPlayer/multiplaytxmgr.hxx>
  73 #include <MultiPlayer/multiplayrxmgr.hxx>
  74 #endif
  75
  76 #include "splash.hxx"
  77 #include "renderer.hxx"
  78 #include "main.hxx"
  79
  80
  81 float default_attenuation[3] = {1.0, 0.0, 0.0};
  82
  83 ssgSelector *lightpoints_brightness = new ssgSelector;
  84 ssgTransform *lightpoints_transform = new ssgTransform;
  85 FGTileEntry *dummy_tile;
  86 sgVec3 rway_ols;
  87
  88 // Clip plane settings...
  89 float scene_nearplane = 0.5f;
  90 float scene_farplane = 120000.0f;
  91
  92 glPointParameterfProc glPointParameterfPtr = 0;
  93 glPointParameterfvProc glPointParameterfvPtr = 0;
  94 bool glPointParameterIsSupported = false;
  95
  96
  97 // fog constants.  I'm a little nervous about putting actual code out
  98 // here but it seems to work (?)
  99 static const double m_log01 = -log( 0.01 );
 100 static const double sqrt_m_log01 = sqrt( m_log01 );
 101 static GLfloat fog_exp_density;
 102 static GLfloat fog_exp2_density;
 103 static GLfloat rwy_exp2_punch_through;
 104 static GLfloat taxi_exp2_punch_through;
 105 static GLfloat ground_exp2_punch_through;
 106
 107 // Sky structures
 108 SGSky *thesky;
 109
 110 #ifdef FG_USE_CLOUDS_3D
 111   SkySceneLoader *sgClouds3d;
 112   bool _bcloud_orig = true;
 113 #endif
 114
 115 // hack
 116 sgMat4 copy_of_ssgOpenGLAxisSwapMatrix =
 117 {
 118   {  1.0f,  0.0f,  0.0f,  0.0f },
 119   {  0.0f,  0.0f, -1.0f,  0.0f },
 120   {  0.0f,  1.0f,  0.0f,  0.0f },
 121   {  0.0f,  0.0f,  0.0f,  1.0f }
 122 };
 123
 124 ssgSimpleState *cloud3d_imposter_state;
 125 ssgSimpleState *default_state;
 126 ssgSimpleState *hud_and_panel;
 127 ssgSimpleState *menus;
 128
 129
 130 void fgRenderFrame() {
 131 #ifdef FG_MPLAYER_AS
 132     // Update any multiplayer models
 133     globals->get_multiplayer_rx_mgr()->Update();
 134 #endif
 135     globals->get_renderer()->update(delta_time_sec);
 136 }
 137
 138 void fgReshape(int width, int height) {
 139     globals->get_renderer()->resize(width,height);
 140 }
 141
 142 void
 143 FGRenderer::build_states( void ) {
 144     default_state = new ssgSimpleState;
 145     default_state->ref();
 146     default_state->disable( GL_TEXTURE_2D );
 147     default_state->enable( GL_CULL_FACE );
 148     default_state->enable( GL_COLOR_MATERIAL );
 149     default_state->setColourMaterial( GL_AMBIENT_AND_DIFFUSE );
 150     default_state->setMaterial( GL_EMISSION, 0, 0, 0, 1 );
 151     default_state->setMaterial( GL_SPECULAR, 0, 0, 0, 1 );
 152     default_state->disable( GL_BLEND );
 153     default_state->disable( GL_ALPHA_TEST );
 154     default_state->disable( GL_LIGHTING );
 155
 156     cloud3d_imposter_state = new ssgSimpleState;
 157     cloud3d_imposter_state->ref();
 158     cloud3d_imposter_state->enable( GL_TEXTURE_2D );
 159     cloud3d_imposter_state->enable( GL_CULL_FACE );
 160     cloud3d_imposter_state->enable( GL_COLOR_MATERIAL );
 161     cloud3d_imposter_state->setColourMaterial( GL_AMBIENT_AND_DIFFUSE );
 162     cloud3d_imposter_state->setMaterial( GL_DIFFUSE, 1, 1, 1, 1 );
 163     cloud3d_imposter_state->setMaterial( GL_AMBIENT, 1, 1, 1, 1 );
 164     cloud3d_imposter_state->setMaterial( GL_EMISSION, 0, 0, 0, 1 );
 165     cloud3d_imposter_state->setMaterial( GL_SPECULAR, 0, 0, 0, 1 );
 166     cloud3d_imposter_state->enable( GL_BLEND );
 167     cloud3d_imposter_state->enable( GL_ALPHA_TEST );
 168     cloud3d_imposter_state->disable( GL_LIGHTING );
 169
 170     hud_and_panel = new ssgSimpleState;
 171     hud_and_panel->ref();
 172     hud_and_panel->disable( GL_CULL_FACE );
 173     hud_and_panel->disable( GL_TEXTURE_2D );
 174     hud_and_panel->disable( GL_LIGHTING );
 175     hud_and_panel->enable( GL_BLEND );
 176
 177     menus = new ssgSimpleState;
 178     menus->ref();
 179     menus->disable( GL_CULL_FACE );
 180     menus->disable( GL_TEXTURE_2D );
 181     menus->enable( GL_BLEND );
 182 }
 183
 184
 185 // Initialize various GL/view parameters
 186 void
 187 FGRenderer::init( void ) {
 188
 189     FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
 190
 191     // Go full screen if requested ...
 192     if ( fgGetBool("/sim/startup/fullscreen") ) {
 193         fgOSFullScreen();
 194     }
 195
 196     // If enabled, normal vectors specified with glNormal are scaled
 197     // to unit length after transformation.  Enabling this has
 198     // performance implications.  See the docs for glNormal.
 199     // glEnable( GL_NORMALIZE );
 200
 201     glEnable( GL_LIGHTING );
 202     glEnable( GL_LIGHT0 );
 203     // glLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec );  // done later with ssg
 204
 205     sgVec3 sunpos;
 206     sgSetVec3( sunpos, l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2] );
 207     ssgGetLight( 0 ) -> setPosition( sunpos );
 208
 209     glFogi (GL_FOG_MODE, GL_EXP2);
 210     if ( (!strcmp(fgGetString("/sim/rendering/fog"), "disabled")) ||
 211          (!fgGetBool("/sim/rendering/shading"))) {
 212         // if fastest fog requested, or if flat shading force fastest
 213         glHint ( GL_FOG_HINT, GL_FASTEST );
 214     } else if ( !strcmp(fgGetString("/sim/rendering/fog"), "nicest") ) {
 215         glHint ( GL_FOG_HINT, GL_NICEST );
 216     }
 217     if ( fgGetBool("/sim/rendering/wireframe") ) {
 218         // draw wire frame
 219         glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
 220     }
 221
 222     // This is the default anyways, but it can't hurt
 223     glFrontFace ( GL_CCW );
 224
 225     // Just testing ...
 226     // glEnable(GL_POINT_SMOOTH);
 227     // glEnable(GL_LINE_SMOOTH);
 228     // glEnable(GL_POLYGON_SMOOTH);
 229 }
 230
 231
 232 // For HiRes screen Dumps using Brian Pauls TR Library
 233 void
 234 FGRenderer::screendump( void ) {
 235 #ifdef FG_ENABLE_MULTIPASS_CLOUDS
 236     bool multi_pass_clouds = fgGetBool("/sim/rendering/multi-pass-clouds") &&
 237                             !SGCloudLayer::enable_bump_mapping; // ugly artefact now
 238 #else
 239     bool multi_pass_clouds = false;
 240 #endif
 241     bool draw_clouds = fgGetBool("/environment/clouds/status");
 242
 243     if ( fgPanelVisible() ) {
 244         GLfloat height = fgGetInt("/sim/startup/ysize");
 245         GLfloat view_h =
 246             (globals->get_current_panel()->getViewHeight() - globals->get_current_panel()->getYOffset())
 247             * (height / 768.0) + 1;
 248         glTranslatef( 0.0, view_h, 0.0 );
 249     }
 250
 251     static GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
 252     static GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
 253
 254     FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
 255
 256     glClearColor(l->adj_fog_color()[0], l->adj_fog_color()[1],
 257                  l->adj_fog_color()[2], l->adj_fog_color()[3]);
 258
 259     glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
 260
 261     // set the opengl state to known default values
 262     default_state->force();
 263
 264     glEnable( GL_FOG );
 265     glFogf  ( GL_FOG_DENSITY, fog_exp2_density);
 266     glFogi  ( GL_FOG_MODE,    GL_EXP2 );
 267     glFogfv ( GL_FOG_COLOR,   l->adj_fog_color() );
 268
 269     // GL_LIGHT_MODEL_AMBIENT has a default non-zero value so if
 270     // we only update GL_AMBIENT for our lights we will never get
 271     // a completely dark scene.  So, we set GL_LIGHT_MODEL_AMBIENT
 272     // explicitely to black.
 273     glLightModelfv( GL_LIGHT_MODEL_AMBIENT, black );
 274     glLightModeli( GL_LIGHT_MODEL_LOCAL_VIEWER, GL_FALSE );
 275
 276     ssgGetLight( 0 ) -> setColour( GL_AMBIENT, l->scene_ambient() );
 277
 278     // texture parameters
 279     glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
 280     glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
 281
 282     // we need a white diffuse light for the phase of the moon
 283     ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, white );
 284     thesky->preDraw( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 285                      fog_exp2_density );
 286
 287     // draw the ssg scene
 288     // return to the desired diffuse color
 289     ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse() );
 290     glEnable( GL_DEPTH_TEST );
 291     ssgSetNearFar( scene_nearplane, scene_farplane );
 292     if ( draw_clouds ) {
 293         // Draw the terrain
 294         FGTileMgr::set_tile_filter( true );
 295         sgSetModelFilter( false );
 296         globals->get_aircraft_model()->select( false );
 297         ssgCullAndDraw( globals->get_scenery()->get_scene_graph() );
 298         // Disable depth buffer update, draw the clouds
 299         glDepthMask( GL_FALSE );
 300         thesky->drawUpperClouds();
 301         if ( multi_pass_clouds ) {
 302             thesky->drawLowerClouds();
 303         }
 304         glDepthMask( GL_TRUE );
 305         if ( multi_pass_clouds ) {
 306             // Draw the objects except the aircraft
 307             //  and update the stencil buffer with 1
 308             glEnable( GL_STENCIL_TEST );
 309             glStencilFunc( GL_ALWAYS, 1, 1 );
 310             glStencilOp( GL_KEEP, GL_KEEP, GL_REPLACE );
 311         }
 312         FGTileMgr::set_tile_filter( false );
 313         sgSetModelFilter( true );
 314         ssgCullAndDraw( globals->get_scenery()->get_scene_graph() );
 315     } else {
 316         FGTileMgr::set_tile_filter( true );
 317         sgSetModelFilter( true );
 318         globals->get_aircraft_model()->select( false );
 319         ssgCullAndDraw( globals->get_scenery()->get_scene_graph() );
 320     }
 321
 322     // draw the lights
 323     glFogf (GL_FOG_DENSITY, rwy_exp2_punch_through);
 324     ssgSetNearFar( scene_nearplane, scene_farplane );
 325     ssgCullAndDraw( globals->get_scenery()->get_vasi_lights_root() );
 326     ssgCullAndDraw( globals->get_scenery()->get_rwy_lights_root() );
 327
 328     ssgCullAndDraw( globals->get_scenery()->get_gnd_lights_root() );
 329
 330     if ( draw_clouds ) {
 331         if ( multi_pass_clouds ) {
 332             // Disable depth buffer update, draw the clouds where the
 333             //  objects overwrite the already drawn clouds, by testing
 334             //  the stencil buffer against 1
 335             glDepthMask( GL_FALSE );
 336             glStencilFunc( GL_EQUAL, 1, 1 );
 337             glStencilOp( GL_KEEP, GL_KEEP, GL_KEEP );
 338             thesky->drawUpperClouds();
 339             thesky->drawLowerClouds();
 340             glDepthMask( GL_TRUE );
 341             glDisable( GL_STENCIL_TEST );
 342         } else {
 343             glDepthMask( GL_FALSE );
 344             thesky->drawLowerClouds();
 345             glDepthMask( GL_TRUE );
 346         }
 347     }
 348
 349     globals->get_aircraft_model()->select( true );
 350     globals->get_model_mgr()->draw();
 351     globals->get_aircraft_model()->draw();
 352 }
 353
 354
 355 // Update all Visuals (redraws anything graphics related)
 356 void
 357 FGRenderer::update(double dt) {
 358     bool scenery_loaded = fgGetBool("sim/sceneryloaded") || fgGetBool("sim/sceneryloaded-override");
 359     bool draw_otw = fgGetBool("/sim/rendering/draw-otw");
 360     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 361     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 362     bool distance_attenuation = fgGetBool("/sim/rendering/distance-attenuation");
 363 #ifdef FG_ENABLE_MULTIPASS_CLOUDS
 364     bool multi_pass_clouds = fgGetBool("/sim/rendering/multi-pass-clouds") &&
 365                                 !SGCloudLayer::enable_bump_mapping;  // ugly artefact now
 366 #else
 367     bool multi_pass_clouds = false;
 368 #endif
 369     bool draw_clouds = fgGetBool("/environment/clouds/status");
 370
 371     GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
 372     GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
 373
 374     // static const SGPropertyNode *longitude
 375     //     = fgGetNode("/position/longitude-deg");
 376     // static const SGPropertyNode *latitude
 377     //     = fgGetNode("/position/latitude-deg");
 378     // static const SGPropertyNode *altitude
 379     //     = fgGetNode("/position/altitude-ft");
 380     static const SGPropertyNode *groundlevel_nearplane
 381         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 382
 383     FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
 384     static double last_visibility = -9999;
 385
 386     // update fog params
 387     double actual_visibility;
 388     if (fgGetBool("/environment/clouds/status"))
 389         actual_visibility = thesky->get_visibility();
 390     else
 391         actual_visibility = fgGetDouble("/environment/visibility-m");
 392     if ( actual_visibility != last_visibility ) {
 393         last_visibility = actual_visibility;
 394
 395         fog_exp_density = m_log01 / actual_visibility;
 396         fog_exp2_density = sqrt_m_log01 / actual_visibility;
 397         ground_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 1.5);
 398         if ( actual_visibility < 8000 ) {
 399             rwy_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 2.5);
 400             taxi_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 1.5);
 401         } else {
 402             rwy_exp2_punch_through = sqrt_m_log01 / ( 8000 * 2.5 );
 403             taxi_exp2_punch_through = sqrt_m_log01 / ( 8000 * 1.5 );
 404         }
 405     }
 406
 407     // double angle;
 408     // GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
 409     // GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
 410     // GLfloat terrain_color[4] = { 0.54, 0.44, 0.29, 1.0 };
 411     // GLfloat mat_shininess[] = { 10.0 };
 412     GLbitfield clear_mask;
 413
 414     if ( idle_state != 1000 || !scenery_loaded ) {
 415         // still initializing, draw the splash screen
 416         if ( fgGetBool("/sim/startup/splash-screen") ) {
 417             fgSplashUpdate(0.0, 1.0);
 418         }
 419         // Keep resetting sim time while the sim is initializing
 420         globals->set_sim_time_sec( 0.0 );
 421         SGAnimation::set_sim_time_sec( 0.0 );
 422     } else {
 423         // idle_state is now 1000 meaning we've finished all our
 424         // initializations and are running the main loop, so this will
 425         // now work without seg faulting the system.
 426
 427         FGViewer *current__view = globals->get_current_view();
 428
 429         // calculate our current position in cartesian space
 430         globals->get_scenery()->set_center( globals->get_scenery()->get_next_center() );
 431
 432         // update view port
 433         fgReshape( fgGetInt("/sim/startup/xsize"),
 434                    fgGetInt("/sim/startup/ysize") );
 435
 436         if ( fgGetBool("/sim/rendering/clouds3d") ) {
 437             glClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT );
 438             cloud3d_imposter_state->force();
 439             glDisable( GL_FOG );
 440             glColor4f( 1.0, 1.0, 1.0, 1.0 );
 441             glEnable(GL_DEPTH_TEST);
 442             glEnable(GL_BLEND);
 443             glBlendFunc( GL_ONE, GL_ONE_MINUS_SRC_ALPHA ) ;
 444
 445 #ifdef FG_USE_CLOUDS_3D
 446             if ( _bcloud_orig ) {
 447                 Point3D c = globals->get_scenery()->get_center();
 448                 sgClouds3d->Set_Cloud_Orig( &c );
 449                 _bcloud_orig = false;
 450             }
 451             sgClouds3d->Update( current__view->get_absolute_view_pos() );
 452 #endif
 453             glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
 454             glDisable(GL_DEPTH_TEST);
 455         }
 456
 457         clear_mask = GL_DEPTH_BUFFER_BIT;
 458         if ( fgGetBool("/sim/rendering/wireframe") ) {
 459             clear_mask |= GL_COLOR_BUFFER_BIT;
 460         }
 461
 462         if ( skyblend ) {
 463             if ( fgGetBool("/sim/rendering/textures") ) {
 464             // glClearColor(black[0], black[1], black[2], black[3]);
 465             glClearColor(l->adj_fog_color()[0], l->adj_fog_color()[1],
 466                          l->adj_fog_color()[2], l->adj_fog_color()[3]);
 467             clear_mask |= GL_COLOR_BUFFER_BIT;
 468             }
 469         } else {
 470             glClearColor(l->sky_color()[0], l->sky_color()[1],
 471                          l->sky_color()[2], l->sky_color()[3]);
 472             clear_mask |= GL_COLOR_BUFFER_BIT;
 473         }
 474         if ( multi_pass_clouds && draw_clouds ) {
 475             glClearStencil( 0 );
 476             clear_mask |= GL_STENCIL_BUFFER_BIT;
 477         }
 478         glClear( clear_mask );
 479
 480         // Tell GL we are switching to model view parameters
 481
 482         // I really should create a derived ssg node or use a call
 483         // back or something so that I can draw the sky within the
 484         // ssgCullAndDraw() function, but for now I just mimic what
 485         // ssg does to set up the model view matrix
 486         glMatrixMode(GL_MODELVIEW);
 487         glLoadIdentity();
 488         ssgSetCamera( (sgVec4 *)current__view->get_VIEW() );
 489
 490         // set the opengl state to known default values
 491         default_state->force();
 492
 493         // update fog params if visibility has changed
 494         double visibility_meters = fgGetDouble("/environment/visibility-m");
 495         thesky->set_visibility(visibility_meters);
 496
 497         thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 498                             ( global_multi_loop * fgGetInt("/sim/speed-up") )
 499                             / (double)fgGetInt("/sim/model-hz") );
 500
 501         // Set correct opengl fog density
 502         glFogf (GL_FOG_DENSITY, fog_exp2_density);
 503
 504         // update the sky dome
 505         if ( skyblend ) {
 506             /*
 507              SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 508              << l->sky_color()[0] << " "
 509              << l->sky_color()[1] << " "
 510              << l->sky_color()[2] << " "
 511              << l->sky_color()[3] );
 512             SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 513              << l->fog_color()[0] << " "
 514              << l->fog_color()[1] << " "
 515              << l->fog_color()[2] << " "
 516              << l->fog_color()[3] );
 517             SG_LOG( SG_GENERAL, SG_BULK,
 518                     "    sun_angle = " << l->sun_angle
 519              << "    moon_angle = " << l->moon_angle );
 520             */
 521
 522             static SGSkyColor scolor;
 523             FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
 524
 525             scolor.sky_color   = l->sky_color();
 526             scolor.fog_color   = l->adj_fog_color();
 527             scolor.cloud_color = l->cloud_color();
 528             scolor.sun_angle   = l->get_sun_angle();
 529             scolor.moon_angle  = l->get_moon_angle();
 530             scolor.nplanets    = globals->get_ephem()->getNumPlanets();
 531             scolor.nstars      = globals->get_ephem()->getNumStars();
 532             scolor.planet_data = globals->get_ephem()->getPlanets();
 533             scolor.star_data   = globals->get_ephem()->getStars();
 534
 535             thesky->repaint( scolor );
 536
 537             /*
 538             SG_LOG( SG_GENERAL, SG_BULK,
 539                     "thesky->reposition( view_pos = " << view_pos[0] << " "
 540              << view_pos[1] << " " << view_pos[2] );
 541             SG_LOG( SG_GENERAL, SG_BULK,
 542                     "    zero_elev = " << zero_elev[0] << " "
 543              << zero_elev[1] << " " << zero_elev[2]
 544              << " lon = " << cur_fdm_state->get_Longitude()
 545              << " lat = " << cur_fdm_state->get_Latitude() );
 546             SG_LOG( SG_GENERAL, SG_BULK,
 547                     "    sun_rot = " << l->get_sun_rotation
 548              << " gst = " << SGTime::cur_time_params->getGst() );
 549             SG_LOG( SG_GENERAL, SG_BULK,
 550                  "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 551               << " sun dec = " << globals->get_ephem()->getSunDeclination()
 552               << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 553               << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 554             */
 555
 556             // The sun and moon distances are scaled down versions
 557             // of the actual distance to get both the moon and the sun
 558             // within the range of the far clip plane.
 559             // Moon distance:    384,467 kilometers
 560             // Sun distance: 150,000,000 kilometers
 561             double sun_horiz_eff, moon_horiz_eff;
 562             if (fgGetBool("/sim/rendering/horizon-effect")) {
 563             sun_horiz_eff = 0.67+pow(0.5+cos(l->get_sun_angle())*2/2, 0.33)/3;
 564             moon_horiz_eff = 0.67+pow(0.5+cos(l->get_moon_angle())*2/2, 0.33)/3;
 565             } else {
 566                sun_horiz_eff = moon_horiz_eff = 1.0;
 567             }
 568
 569             static SGSkyState sstate;
 570
 571             sstate.view_pos  = current__view->get_view_pos();
 572             sstate.zero_elev = current__view->get_zero_elev();
 573             sstate.view_up   = current__view->get_world_up();
 574             sstate.lon       = current__view->getLongitude_deg()
 575                                 * SGD_DEGREES_TO_RADIANS;
 576             sstate.lat       = current__view->getLatitude_deg()
 577                                 * SGD_DEGREES_TO_RADIANS;
 578             sstate.alt       = current__view->getAltitudeASL_ft()
 579                                 * SG_FEET_TO_METER;
 580             sstate.spin      = l->get_sun_rotation();
 581             sstate.gst       = globals->get_time_params()->getGst();
 582             sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
 583             sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
 584             sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 585             sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
 586             sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
 587             sstate.moon_dist = 40000.0 * moon_horiz_eff;
 588
 589             thesky->reposition( sstate, delta_time_sec );
 590         }
 591
 592         glEnable( GL_DEPTH_TEST );
 593         if ( strcmp(fgGetString("/sim/rendering/fog"), "disabled") ) {
 594             glEnable( GL_FOG );
 595             glFogi( GL_FOG_MODE, GL_EXP2 );
 596             glFogfv( GL_FOG_COLOR, l->adj_fog_color() );
 597         }
 598
 599         // set sun/lighting parameters
 600         ssgGetLight( 0 ) -> setPosition( l->sun_vec() );
 601
 602         // GL_LIGHT_MODEL_AMBIENT has a default non-zero value so if
 603         // we only update GL_AMBIENT for our lights we will never get
 604         // a completely dark scene.  So, we set GL_LIGHT_MODEL_AMBIENT
 605         // explicitely to black.
 606         glLightModelfv( GL_LIGHT_MODEL_AMBIENT, black );
 607
 608         ssgGetLight( 0 ) -> setColour( GL_AMBIENT, l->scene_ambient() );
 609         ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse() );
 610         ssgGetLight( 0 ) -> setColour( GL_SPECULAR, l->scene_specular() );
 611
 612         // texture parameters
 613         // glEnable( GL_TEXTURE_2D );
 614         glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ) ;
 615         glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST ) ;
 616
 617         // glMatrixMode( GL_PROJECTION );
 618         // glLoadIdentity();
 619         ssgSetFOV( current__view->get_h_fov(),
 620                    current__view->get_v_fov() );
 621
 622         double agl =
 623             current_aircraft.fdm_state->get_Altitude() * SG_FEET_TO_METER
 624             - globals->get_scenery()->get_cur_elev();
 625
 626         if ( agl > 10.0 ) {
 627             scene_nearplane = 10.0f;
 628             scene_farplane = 120000.0f;
 629         } else {
 630             scene_nearplane = groundlevel_nearplane->getDoubleValue();
 631             scene_farplane = 120000.0f;
 632         }
 633
 634         ssgSetNearFar( scene_nearplane, scene_farplane );
 635
 636         if ( draw_otw && skyblend ) {
 637             // draw the sky backdrop
 638
 639             // we need a white diffuse light for the phase of the moon
 640             ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, white );
 641             thesky->preDraw( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 642                              fog_exp2_density );
 643             // return to the desired diffuse color
 644             ssgGetLight( 0 ) -> setColour( GL_DIFFUSE, l->scene_diffuse() );
 645         }
 646
 647         // draw the ssg scene
 648         glEnable( GL_DEPTH_TEST );
 649
 650         ssgSetNearFar( scene_nearplane, scene_farplane );
 651
 652         if ( fgGetBool("/sim/rendering/wireframe") ) {
 653             // draw wire frame
 654             glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
 655         }
 656         if ( draw_otw ) {
 657             if ( draw_clouds ) {
 658
 659                 // Draw the terrain
 660                 FGTileMgr::set_tile_filter( true );
 661                 sgSetModelFilter( false );
 662                 globals->get_aircraft_model()->select( false );
 663                 ssgCullAndDraw( globals->get_scenery()->get_scene_graph() );
 664
 665                 // Disable depth buffer update, draw the clouds
 666                 glDepthMask( GL_FALSE );
 667                 thesky->drawUpperClouds();
 668                 if ( multi_pass_clouds ) {
 669                     thesky->drawLowerClouds();
 670                 }
 671                 glDepthMask( GL_TRUE );
 672
 673                 if ( multi_pass_clouds ) {
 674                     // Draw the objects except the aircraft
 675                     //  and update the stencil buffer with 1
 676                     glEnable( GL_STENCIL_TEST );
 677                     glStencilFunc( GL_ALWAYS, 1, 1 );
 678                     glStencilOp( GL_KEEP, GL_KEEP, GL_REPLACE );
 679                 }
 680                 FGTileMgr::set_tile_filter( false );
 681                 sgSetModelFilter( true );
 682                 ssgCullAndDraw( globals->get_scenery()->get_scene_graph() );
 683             } else {
 684                 FGTileMgr::set_tile_filter( true );
 685                 sgSetModelFilter( true );
 686                 globals->get_aircraft_model()->select( false );
 687                 ssgCullAndDraw( globals->get_scenery()->get_scene_graph() );
 688             }
 689         }
 690
 691         // This is a bit kludgy.  Every 200 frames, do an extra
 692         // traversal of the scene graph without drawing anything, but
 693         // with the field-of-view set to 360x360 degrees.  This
 694         // ensures that out-of-range random objects that are not in
 695         // the current view frustum will still be freed properly.
 696         static int counter = 0;
 697         counter++;
 698         if (counter == 200) {
 699             sgFrustum f;
 700             f.setFOV(360, 360);
 701                     // No need to put the near plane too close;
 702                     // this way, at least the aircraft can be
 703                     // culled.
 704             f.setNearFar(1000, 1000000);
 705             sgMat4 m;
 706             ssgGetModelviewMatrix(m);
 707             FGTileMgr::set_tile_filter( true );
 708             sgSetModelFilter( true );
 709             globals->get_scenery()->get_scene_graph()->cull(&f, m, true);
 710             counter = 0;
 711         }
 712
 713         // change state for lighting here
 714
 715         // draw runway lighting
 716         glFogf (GL_FOG_DENSITY, rwy_exp2_punch_through);
 717         ssgSetNearFar( scene_nearplane, scene_farplane );
 718
 719         if ( enhanced_lighting ) {
 720
 721             // Enable states for drawing points with GL_extension
 722             glEnable(GL_POINT_SMOOTH);
 723
 724             if ( distance_attenuation && glPointParameterIsSupported )
 725             {
 726                 // Enable states for drawing points with GL_extension
 727                 glEnable(GL_POINT_SMOOTH);
 728
 729                 float quadratic[3] = {1.0, 0.001, 0.0000001};
 730                 // makes the points fade as they move away
 731                 glPointParameterfvPtr(GL_DISTANCE_ATTENUATION_EXT, quadratic);
 732                 glPointParameterfPtr(GL_POINT_SIZE_MIN_EXT, 1.0);
 733             }
 734
 735             glPointSize(4.0);
 736
 737             // blending function for runway lights
 738             glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA) ;
 739         }
 740
 741         glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
 742         glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
 743         glEnable(GL_TEXTURE_GEN_S);
 744         glEnable(GL_TEXTURE_GEN_T);
 745         glPolygonMode(GL_FRONT, GL_POINT);
 746
 747         // draw runway lighting
 748         if ( draw_otw ) {
 749             ssgCullAndDraw( globals->get_scenery()->get_vasi_lights_root() );
 750             ssgCullAndDraw( globals->get_scenery()->get_rwy_lights_root() );
 751         }
 752
 753         // change punch through and then draw taxi lighting
 754         glFogf ( GL_FOG_DENSITY, fog_exp2_density );
 755         // sgVec3 taxi_fog;
 756         // sgSetVec3( taxi_fog, 0.0, 0.0, 0.0 );
 757         // glFogfv ( GL_FOG_COLOR, taxi_fog );
 758         if ( draw_otw ) {
 759             ssgCullAndDraw( globals->get_scenery()->get_taxi_lights_root() );
 760         }
 761
 762         // clean up lighting
 763         glPolygonMode(GL_FRONT, GL_FILL);
 764         glDisable(GL_TEXTURE_GEN_S);
 765         glDisable(GL_TEXTURE_GEN_T);
 766
 767         //static int _frame_count = 0;
 768         //if (_frame_count % 30 == 0) {
 769         //  printf("SSG: %s\n", ssgShowStats());
 770         //}
 771         //else {
 772         //  ssgShowStats();
 773         //}
 774         //_frame_count++;
 775
 776
 777         if ( enhanced_lighting ) {
 778             if ( distance_attenuation && glPointParameterIsSupported ) {
 779                 glPointParameterfvPtr(GL_DISTANCE_ATTENUATION_EXT,
 780                                       default_attenuation);
 781             }
 782
 783             glPointSize(1.0);
 784             glDisable(GL_POINT_SMOOTH);
 785         }
 786
 787         // draw ground lighting
 788         glFogf (GL_FOG_DENSITY, ground_exp2_punch_through);
 789         if ( draw_otw ) {
 790             ssgCullAndDraw( globals->get_scenery()->get_gnd_lights_root() );
 791         }
 792
 793         if ( draw_otw && fgGetBool("/sim/rendering/clouds3d") ) {
 794             glDisable( GL_FOG );
 795             glDisable( GL_LIGHTING );
 796             // cout << "drawing new clouds" << endl;
 797
 798             glEnable(GL_DEPTH_TEST);
 799             glEnable(GL_BLEND);
 800             glBlendFunc( GL_ONE, GL_ONE_MINUS_SRC_ALPHA ) ;
 801
 802             /*
 803             glEnable( GL_TEXTURE_2D );
 804             glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 805             glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 806             glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 807             glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 808             */
 809
 810 #ifdef FG_USE_CLOUDS_3D
 811             sgClouds3d->Draw((sgVec4 *)current__view->get_VIEW());
 812 #endif
 813             glEnable( GL_FOG );
 814             glEnable( GL_LIGHTING );
 815             glEnable( GL_DEPTH_TEST );
 816             glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
 817         }
 818
 819         if ( draw_otw && draw_clouds ) {
 820             if ( multi_pass_clouds ) {
 821                 // Disable depth buffer update, draw the clouds where the
 822                 //  objects overwrite the already drawn clouds, by testing
 823                 //  the stencil buffer against 1
 824                 glDepthMask( GL_FALSE );
 825                 glStencilFunc( GL_EQUAL, 1, 1 );
 826                 glStencilOp( GL_KEEP, GL_KEEP, GL_KEEP );
 827                 thesky->drawUpperClouds();
 828                 thesky->drawLowerClouds();
 829                 glDepthMask( GL_TRUE );
 830                 glDisable( GL_STENCIL_TEST );
 831             } else {
 832                 glDepthMask( GL_FALSE );
 833                 thesky->drawLowerClouds();
 834                 glDepthMask( GL_TRUE );
 835             }
 836         }
 837
 838         if ( draw_otw ) {
 839             FGTileMgr::set_tile_filter( false );
 840             sgSetModelFilter( false );
 841             globals->get_aircraft_model()->select( true );
 842             globals->get_model_mgr()->draw();
 843             globals->get_aircraft_model()->draw();
 844             // If the view is internal, the previous line draw the
 845             //  cockpit with modified near/far clip planes and deselect
 846             //  the aircraft in the global scenegraph
 847             // Otherwise, it just enables the aircraft: The scenegraph
 848             //  must be drawn again to see the plane.
 849             ssgCullAndDraw( globals->get_scenery()->get_scene_graph() );
 850             FGTileMgr::set_tile_filter( true );
 851             sgSetModelFilter( true );
 852             globals->get_aircraft_model()->select( true );
 853         }
 854
 855         // display HUD && Panel
 856         glDisable( GL_FOG );
 857         glDisable( GL_DEPTH_TEST );
 858         // glDisable( GL_CULL_FACE );
 859         // glDisable( GL_TEXTURE_2D );
 860
 861         // update the controls subsystem
 862         globals->get_controls()->update(delta_time_sec);
 863
 864         hud_and_panel->apply();
 865         fgCockpitUpdate();
 866
 867         // Use the hud_and_panel ssgSimpleState for rendering the ATC output
 868         // This only works properly if called before the panel call
 869         if((fgGetBool("/sim/ATC/enabled")) || (fgGetBool("/sim/ai-traffic/enabled")))
 870             globals->get_ATC_display()->update(delta_time_sec);
 871
 872         // update the panel subsystem
 873         if ( globals->get_current_panel() != NULL ) {
 874             globals->get_current_panel()->update(delta_time_sec);
 875         }
 876         fgUpdate3DPanels();
 877
 878         // We can do translucent menus, so why not. :-)
 879         menus->apply();
 880         glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
 881         puDisplay();
 882         // glDisable ( GL_BLEND ) ;
 883
 884         glEnable( GL_DEPTH_TEST );
 885         glEnable( GL_FOG );
 886
 887         // Fade out the splash screen over the first three seconds.
 888         double t = globals->get_sim_time_sec();
 889         if ( t <= 1.0 ) {
 890             fgSplashUpdate(0.0, 1.0);
 891         } else if ( t <= 3.0) {
 892             fgSplashUpdate(0.0, (3.0 - t) / 2.0);
 893         }
 894     }
 895 }
 896
 897
 898
 899 // options.cxx needs to see this for toggle_panel()
 900 // Handle new window size or exposure
 901 void
 902 FGRenderer::resize( int width, int height ) {
 903     int view_h;
 904
 905     if ( (!fgGetBool("/sim/virtual-cockpit"))
 906          && fgPanelVisible() && idle_state == 1000 ) {
 907         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 908                              globals->get_current_panel()->getYOffset()) / 768.0);
 909     } else {
 910         view_h = height;
 911     }
 912
 913     glViewport( 0, (GLint)(height - view_h), (GLint)(width), (GLint)(view_h) );
 914
 915     fgSetInt("/sim/startup/xsize", width);
 916     fgSetInt("/sim/startup/ysize", height);
 917     guiInitMouse(width, height);
 918
 919     // for all views
 920     FGViewMgr *viewmgr = globals->get_viewmgr();
 921     if (viewmgr) {
 922       for ( int i = 0; i < viewmgr->size(); ++i ) {
 923         viewmgr->get_view(i)->
 924           set_aspect_ratio((float)view_h / (float)width);
 925       }
 926
 927       ssgSetFOV( viewmgr->get_current_view()->get_h_fov(),
 928                viewmgr->get_current_view()->get_v_fov() );
 929
 930 #ifdef FG_USE_CLOUDS_3D
 931       sgClouds3d->Resize( viewmgr->get_current_view()->get_h_fov(),
 932                viewmgr->get_current_view()->get_v_fov() );
 933 #endif
 934     }
 935
 936     fgHUDReshape();
 937
 938 }
 939
 940
 941 // end of renderer.cxx