source/designer/designer.cpp

   1 #include <signal.h>
   2 #include <algorithm>
   3 #include <cmath>
   4 #include <msp/fs/utils.h>
   5 #include <msp/gl/blend.h>
   6 #include <msp/gl/framebuffer.h>
   7 #include <msp/gl/matrix.h>
   8 #include <msp/gl/misc.h>
   9 #include <msp/gl/projection.h>
  10 #include <msp/gl/tests.h>
  11 #include <msp/gl/texture2d.h>
  12 #include <msp/input/keys.h>
  13 #include <msp/io/print.h>
  14 #include <msp/stringcodec/codec.h>
  15 #include <msp/stringcodec/utf8.h>
  16 #include <msp/strings/lexicalcast.h>
  17 #include <msp/strings/utils.h>
  18 #include <msp/time/units.h>
  19 #include <msp/time/utils.h>
  20 #include "libr2c2/route.h"
  21 #include "libr2c2/tracktype.h"
  22 #include "libr2c2/zone.h"
  23 #include "3d/path.h"
  24 #include "designer.h"
  25 #include "input.h"
  26 #include "layoutbar.h"
  27 #include "manipulator.h"
  28 #include "measure.h"
  29 #include "routebar.h"
  30 #include "selection.h"
  31 #include "svgexporter.h"
  32 #include "trackbar.h"
  33 #include "trackproperties.h"
  34 #include "zonebar.h"
  35 #include "zoneproperties.h"
  36
  37 using namespace std;
  38 using namespace R2C2;
  39 using namespace Msp;
  40
  41 Designer::Designer(int argc, char **argv):
  42         window(1280, 960),
  43         keyboard(window),
  44         mouse(window),
  45         ui_res("r2c2.res"),
  46         root(ui_res, window),
  47         base_object(0),
  48         cur_route(0),
  49         cur_zone(0),
  50         mode(SELECT),
  51         manipulator(*this, mouse, selection),
  52         measure(*this)
  53 {
  54         window.set_title("Railway Designer");
  55         window.signal_close.connect(sigc::bind(sigc::mem_fun(this, &Designer::exit), 0));
  56
  57         selection.signal_changed.connect(sigc::mem_fun(this, &Designer::selection_changed));
  58         manipulator.signal_status.connect(sigc::mem_fun(this, &Designer::manipulation_status));
  59         manipulator.signal_done.connect(sigc::mem_fun(this, &Designer::manipulation_done));
  60         measure.signal_changed.connect(sigc::mem_fun(this, &Designer::measure_changed));
  61         measure.signal_done.connect(sigc::mem_fun(this, &Designer::measure_done));
  62
  63         // Setup catalogue and layout
  64         DataFile::load(catalogue, "tracks.dat");
  65
  66         cat_layout_3d = new Layout3D(catalogue.get_layout());
  67
  68         layout = new Layout(catalogue);
  69         layout_3d = new Layout3D(*layout);
  70
  71         layout->signal_track_added.connect(sigc::mem_fun(this, &Designer::track_added));
  72         layout->signal_track_removed.connect(sigc::mem_fun(this, &Designer::track_removed));
  73
  74         if(argc>1)
  75         {
  76                 filename = argv[1];
  77                 DataFile::load(*layout, argv[1]);
  78
  79                 if(!layout->get_base().empty())
  80                 {
  81                         base_object = new GL::Object;
  82                         DataFile::load(*base_object, layout->get_base());
  83                 }
  84         }
  85
  86         // Setup OpenGL
  87         cat_view = new View3D(*cat_layout_3d, window.get_width(), window.get_height());
  88
  89         main_view = new View3D(*layout_3d, window.get_width(), window.get_height());
  90         GL::Pipeline *pipeline = &main_view->get_pipeline();
  91
  92         GL::Pipeline::Pass *pass = &pipeline->add_pass("unlit");
  93         pass->set_depth_test(&GL::DepthTest::lequal());
  94         pass->set_blend(&GL::Blend::alpha());
  95
  96         pass = &pipeline->add_pass("blended");
  97         pass->set_lighting(&layout_3d->get_lighting());
  98         pass->set_depth_test(&GL::DepthTest::lequal());
  99         pass->set_blend(&GL::Blend::alpha());
 100
 101         pass = &pipeline->add_pass("overlay");
 102         pass->set_blend(&GL::Blend::alpha());
 103
 104         if(base_object)
 105                 pipeline->add_renderable(*base_object);
 106         pipeline->add_renderable_for_pass(layout_3d->get_path_scene(), "unlit");
 107         pipeline->add_renderable_for_pass(layout_3d->get_endpoint_scene(), "unlit");
 108
 109         // Setup UI
 110         keyboard.signal_button_press.connect(sigc::mem_fun(this, &Designer::key_press));
 111         mouse.signal_button_press.connect(sigc::mem_fun(this, &Designer::button_press));
 112         mouse.signal_axis_motion.connect(sigc::mem_fun(this, &Designer::axis_motion));
 113         root.signal_tooltip.connect(sigc::mem_fun(this, &Designer::tooltip));
 114
 115         toolbars.push_back(new Layoutbar(*this));
 116         toolbars.push_back(new Trackbar(*this));
 117         toolbars.push_back(new Routebar(*this));
 118         toolbars.push_back(new Zonebar(*this));
 119         for(vector<Toolbar *>::iterator i=toolbars.begin(); i!=toolbars.end(); ++i)
 120         {
 121                 root.add(**i);
 122                 if(i!=toolbars.begin())
 123                         (*i)->expand(false);
 124                 (*i)->signal_expanded.connect(sigc::hide(sigc::mem_fun(this, &Designer::arrange_toolbars)));
 125         }
 126         arrange_toolbars();
 127
 128         GLtk::Panel *statusbar = new GLtk::Panel;
 129         root.add(*statusbar);
 130         statusbar->set_size(window.get_width(), 20);
 131         statusbar->set_focusable(false);
 132
 133         lbl_status = new GLtk::Label;
 134         statusbar->add(*lbl_status);
 135         lbl_status->set_geometry(GLtk::Geometry(20, 2, 300, 16));
 136
 137         track_wrap = new TrackWrap(*layout_3d, selection);
 138         pipeline->add_renderable_for_pass(*track_wrap, "unlit");
 139         overlay = new Overlay3D(ui_res.get_default_font());
 140         pipeline->add_renderable_for_pass(*overlay, "overlay");
 141         pipeline->add_renderable_for_pass(measure, "unlit");
 142
 143         camera_ctl = new CameraController(*main_view, keyboard, mouse);
 144         cat_view->get_camera().set_look_direction(GL::Vector3(0, 0.13053, -0.99144));
 145         cat_view->view_all(true);
 146         main_view->view_all();
 147
 148         const Layout3D::TrackMap &tracks = layout_3d->get_tracks();
 149         for(Layout3D::TrackMap::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
 150                 update_track_icon(*i->second);
 151 }
 152
 153 Designer::~Designer()
 154 {
 155         for(vector<Toolbar *>::iterator i=toolbars.begin(); i!=toolbars.end(); ++i)
 156                 delete *i;
 157         delete camera_ctl;
 158         delete track_wrap;
 159         delete overlay;
 160         delete main_view;
 161         delete base_object;
 162         delete layout_3d;
 163         delete layout;
 164         delete cat_view;
 165         delete cat_layout_3d;
 166 }
 167
 168 int Designer::main()
 169 {
 170         window.show();
 171
 172         mode = SELECT;
 173
 174         return Application::main();
 175 }
 176
 177 void Designer::save()
 178 {
 179         InputDialog *input = new InputDialog(*this, "Save layout", filename);
 180         input->signal_accept.connect(sigc::mem_fun(layout, &Layout::save));
 181 }
 182
 183 void Designer::quit()
 184 {
 185         exit(0);
 186 }
 187
 188 void Designer::new_track()
 189 {
 190         if(mode!=SELECT)
 191                 return;
 192
 193         mode = CATALOGUE;
 194         lbl_status->set_text("Select new track or press Esc to cancel");
 195 }
 196
 197 void Designer::erase_tracks()
 198 {
 199         if(mode!=SELECT)
 200                 return;
 201
 202         set<Track *> tracks = selection.get_tracks();
 203         selection.clear();
 204         for(set<Track *>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
 205         {
 206                 overlay->clear(layout_3d->get_track(**i));
 207                 delete *i;
 208         }
 209 }
 210
 211 void Designer::track_properties()
 212 {
 213         if(mode!=SELECT || selection.empty())
 214                 return;
 215
 216         TrackProperties *track_prop = new TrackProperties(selection);
 217         root.add(*track_prop);
 218         const GLtk::Geometry &root_geom = root.get_geometry();
 219         const GLtk::Geometry &dlg_geom = track_prop->get_geometry();
 220         track_prop->set_position((root_geom.w-dlg_geom.w)/2, (root_geom.h-dlg_geom.h)/2);
 221
 222         track_prop->signal_response.connect(sigc::mem_fun(this, &Designer::track_properties_response));
 223 }
 224
 225 void Designer::extend_track()
 226 {
 227         if(mode!=SELECT)
 228                 return;
 229
 230         if(manipulator.start_extend())
 231                 mode = MANIPULATE;
 232 }
 233
 234 void Designer::connect_tracks()
 235 {
 236         if(mode!=SELECT)
 237                 return;
 238
 239         manipulator.connect();
 240 }
 241
 242 void Designer::flatten_tracks()
 243 {
 244         if(mode!=SELECT)
 245                 return;
 246
 247         manipulator.flatten();
 248 }
 249
 250 void Designer::svg_export()
 251 {
 252         InputDialog *input = new InputDialog(*this, "SVG export", FS::basepart(filename)+".svg");
 253         input->signal_accept.connect(sigc::mem_fun(this, &Designer::svg_export_accept));
 254 }
 255
 256 void Designer::edit_route(Route *r)
 257 {
 258         cur_route = r;
 259         cur_zone = 0;
 260         if(cur_route)
 261                 show_route(*cur_route);
 262         else
 263                 clear_paths();
 264 }
 265
 266 void Designer::rename_route()
 267 {
 268         if(mode!=SELECT || !cur_route)
 269                 return;
 270
 271         InputDialog *input = new InputDialog(*this, "Route name", cur_route->get_name());
 272         input->signal_accept.connect(sigc::mem_fun(this, &Designer::route_name_accept));
 273 }
 274
 275 void Designer::add_selection_to_route()
 276 {
 277         if(!cur_route)
 278                 return;
 279
 280         try
 281         {
 282                 cur_route->add_tracks(selection.get_tracks());
 283         }
 284         catch(const exception &e)
 285         {
 286                 lbl_status->set_text(e.what());
 287         }
 288
 289         show_route(*cur_route);
 290 }
 291
 292 void Designer::edit_zone(Zone *z)
 293 {
 294         cur_zone = z;
 295         cur_route = 0;
 296         if(cur_zone)
 297                 show_zone(*cur_zone);
 298         else
 299                 clear_paths();
 300 }
 301
 302 void Designer::zone_properties()
 303 {
 304         if(!cur_zone)
 305                 return;
 306
 307         ZoneProperties *zone_prop = new ZoneProperties(*cur_zone);
 308         root.add(*zone_prop);
 309         const GLtk::Geometry &root_geom = root.get_geometry();
 310         const GLtk::Geometry &dlg_geom = zone_prop->get_geometry();
 311         zone_prop->set_position((root_geom.w-dlg_geom.w)/2, (root_geom.h-dlg_geom.h)/2);
 312 }
 313
 314 void Designer::add_selection_to_zone()
 315 {
 316         if(!cur_zone)
 317                 return;
 318
 319         try
 320         {
 321                 cur_zone->add_tracks(selection.get_tracks());
 322         }
 323         catch(const exception &e)
 324         {
 325                 lbl_status->set_text(e.what());
 326         }
 327
 328         show_zone(*cur_zone);
 329 }
 330
 331 Vector Designer::map_pointer_to_ground(const Vector &p)
 332 {
 333         GL::Vector4 vec = main_view->get_camera().unproject(GL::Vector4(p.x, p.y, 0, 0));
 334         const GL::Vector3 &pos = main_view->get_camera().get_position();
 335
 336         return Vector(pos.x-vec.x*pos.z/vec.z, pos.y-vec.y*pos.z/vec.z);
 337 }
 338
 339 void Designer::tick()
 340 {
 341         const Msp::Time::TimeStamp t = Msp::Time::now();
 342         float dt = (t-last_tick)/Msp::Time::sec;
 343         last_tick = t;
 344
 345         if(mode==MANIPULATE_DONE)
 346                 mode = SELECT;
 347
 348         window.tick();
 349         root.tick();
 350         camera_ctl->tick(dt);
 351
 352         for(list<Track *>::iterator i=new_tracks.begin(); i!=new_tracks.end(); ++i)
 353                 layout_3d->get_track(**i).get_path().set_mask(0);
 354         new_tracks.clear();
 355
 356         render();
 357
 358         window.swap_buffers();
 359 }
 360
 361 void Designer::key_press(unsigned key)
 362 {
 363         bool shift = keyboard.get_button_state(Input::KEY_SHIFT_L) || keyboard.get_button_state(Input::KEY_SHIFT_R);
 364
 365         if(key==Msp::Input::KEY_N && shift)
 366                 extend_track();
 367         else if(key==Msp::Input::KEY_N)
 368                 new_track();
 369         else if(key==Msp::Input::KEY_G)
 370         {
 371                 manipulator.start_move();
 372                 mode = MANIPULATE;
 373         }
 374         else if(key==Msp::Input::KEY_R)
 375         {
 376                 manipulator.start_rotate();
 377                 mode = MANIPULATE;
 378         }
 379         else if(key==Msp::Input::KEY_D)
 380         {
 381                 manipulator.duplicate();
 382                 manipulator.start_move();
 383                 mode = MANIPULATE;
 384         }
 385         else if(key==Msp::Input::KEY_W)
 386                 save();
 387         else if(key==Msp::Input::KEY_PLUS)
 388                 selection.select_more();
 389         else if(key==Msp::Input::KEY_L && shift)
 390                 selection.select_blocks();
 391         else if(key==Msp::Input::KEY_L)
 392                 selection.select_linked();
 393         else if(key==Msp::Input::KEY_M)
 394         {
 395                 measure.start();
 396                 mode = MEASURE;
 397         }
 398         else if(key==Msp::Input::KEY_Z)
 399         {
 400                 manipulator.start_elevate();
 401                 mode = MANIPULATE;
 402         }
 403         else if(key==Msp::Input::KEY_ESC)
 404         {
 405                 if(mode==MANIPULATE)
 406                         manipulator.cancel();
 407                 else if(mode==CATALOGUE)
 408                         mode = SELECT;
 409                 else
 410                         selection.clear();
 411         }
 412         else if(key==Msp::Input::KEY_X)
 413                 erase_tracks();
 414         else if(key==Msp::Input::KEY_F && shift)
 415         {
 416                 const set<Track *> &tracks = selection.get_tracks();
 417                 const set<Track *> &ltracks = layout->get_tracks();
 418                 for(set<Track *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
 419                 {
 420                         (*i)->set_flex(!(*i)->get_flex());
 421                         (*i)->break_links();
 422                         for(set<Track *>::const_iterator j=ltracks.begin(); j!=ltracks.end(); ++j)
 423                                 if(*j!=*i)
 424                                         (*i)->snap_to(**j, true);
 425
 426                         update_track_icon(layout_3d->get_track(**i));
 427                 }
 428         }
 429         else if(key==Msp::Input::KEY_F)
 430                 flatten_tracks();
 431         else if(key==Msp::Input::KEY_E && shift)
 432                 manipulator.even_slope(true);
 433         else if(key==Msp::Input::KEY_E)
 434                 manipulator.even_slope();
 435         else if(key==Msp::Input::KEY_A)
 436         {
 437                 if(cur_route)
 438                         add_selection_to_route();
 439                 else if(cur_zone)
 440                         add_selection_to_zone();
 441         }
 442         else if(key==Msp::Input::KEY_C)
 443                 connect_tracks();
 444         else if(key==Msp::Input::KEY_V)
 445                 svg_export();
 446         else if(key==Msp::Input::KEY_P)
 447                 track_properties();
 448 }
 449
 450 void Designer::button_press(unsigned btn)
 451 {
 452         bool shift = keyboard.get_button_state(Input::KEY_SHIFT_L) || keyboard.get_button_state(Input::KEY_SHIFT_R);
 453
 454         Vector pointer(mouse.get_axis_value(0), mouse.get_axis_value(1));
 455         Vector ground = map_pointer_to_ground(pointer);
 456
 457         if(mode==CATALOGUE)
 458         {
 459                 if(btn==1)
 460                 {
 461                         Track *ctrack = pick_track(pointer);
 462                         if(ctrack)
 463                         {
 464                                 Track *track = new Track(*layout, ctrack->get_type());
 465                                 track->set_position(ground);
 466
 467                                 selection.clear();
 468                                 selection.add_track(track);
 469
 470                                 mode = SELECT;
 471                         }
 472                 }
 473                 else
 474                         mode = SELECT;
 475         }
 476         else if(mode==SELECT)
 477         {
 478                 if(btn==1)
 479                 {
 480                         Track *track = pick_track(pointer);
 481                         if(track)
 482                         {
 483                                 if(!shift)
 484                                         selection.clear();
 485                                 selection.toggle_track(track);
 486                         }
 487                 }
 488         }
 489         else if(mode==MEASURE)
 490                 measure.button_press(ground.x, ground.y, btn);
 491 }
 492
 493 void Designer::axis_motion(unsigned, float, float)
 494 {
 495         Vector pointer(mouse.get_axis_value(0), mouse.get_axis_value(1));
 496         float wx = pointer.x*window.get_width();
 497         float wy = pointer.y*window.get_height();
 498
 499         if(!root.get_child_at(wx, wy))
 500         {
 501                 Vector ground = map_pointer_to_ground(pointer);
 502                 measure.pointer_motion(ground.x, ground.y);
 503         }
 504 }
 505
 506 void Designer::render()
 507 {
 508         GL::Framebuffer::system().clear(GL::COLOR_BUFFER_BIT|GL::DEPTH_BUFFER_BIT);
 509
 510         View3D *view = (mode==CATALOGUE ? cat_view : main_view);
 511         view->render();
 512
 513         root.render();
 514         // XXX Should fix GLtk so this would not be needed
 515         glColor3f(1.0, 1.0, 1.0);
 516 }
 517
 518 void Designer::track_added(Track &trk)
 519 {
 520         new_tracks.push_back(&trk);
 521 }
 522
 523 void Designer::track_removed(Track &trk)
 524 {
 525         list<Track *>::iterator i = find(new_tracks.begin(), new_tracks.end(), &trk);
 526         if(i!=new_tracks.end())
 527                 new_tracks.erase(i);
 528 }
 529
 530 Track *Designer::pick_track(const Vector &pointer)
 531 {
 532         View3D &view = *(mode==CATALOGUE ? cat_view : main_view);
 533         const GL::Vector3 &cpos = view.get_camera().get_position();
 534         GL::Vector4 cray = view.get_camera().unproject(GL::Vector4(pointer.x, pointer.y, 0, 0));
 535
 536         return view.get_layout().get_layout().pick_track(Vector(cpos.x, cpos.y, cpos.z), Vector(cray.x, cray.y, cray.z));
 537 }
 538
 539 void Designer::update_track_icon(Track3D &track)
 540 {
 541         overlay->clear(track);
 542
 543         if(track.get_track().get_flex())
 544                 overlay->add_graphic(track, "flex");
 545
 546         if(unsigned sid = track.get_track().get_sensor_id())
 547         {
 548                 overlay->add_graphic(track, "sensor");
 549                 overlay->set_label(track, lexical_cast<string>(sid));
 550         }
 551         else if(unsigned tid = track.get_track().get_turnout_id())
 552         {
 553                 if(tid<0x800)
 554                 {
 555                         overlay->add_graphic(track, "turnout");
 556                         overlay->set_label(track, lexical_cast<string>(tid));
 557                 }
 558         }
 559 }
 560
 561 void Designer::selection_changed()
 562 {
 563         const set<Track *> &tracks = selection.get_tracks();
 564         if(tracks.empty())
 565                 lbl_status->set_text(string());
 566         else
 567         {
 568                 float len = 0;
 569                 for(set<Track *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
 570                         len += (*i)->get_type().get_total_length();
 571                 lbl_status->set_text(format("%.2fm of track selected\n", len));
 572         }
 573 }
 574
 575 void Designer::manipulation_status(const string &status)
 576 {
 577         lbl_status->set_text(status);
 578 }
 579
 580 void Designer::manipulation_done(bool)
 581 {
 582         mode = MANIPULATE_DONE;
 583         selection_changed();
 584 }
 585
 586 void Designer::measure_changed()
 587 {
 588         float pard = measure.get_parallel_distance()*1000;
 589         float perpd = measure.get_perpendicular_distance()*1000;
 590         float d = sqrt(pard*pard+perpd*perpd);
 591         float adiff = measure.get_angle_difference()*180/M_PI;
 592         string info = format("Par %.1fmm - Perp %.1fmm - Total %.1fmm - Angle %.1f°", pard, perpd, d, adiff);
 593         lbl_status->set_text(info);
 594 }
 595
 596 void Designer::measure_done()
 597 {
 598         mode = SELECT;
 599         selection_changed();
 600 }
 601
 602 void Designer::arrange_toolbars()
 603 {
 604         unsigned x = 0;
 605         for(vector<Toolbar *>::iterator i=toolbars.begin(); i!=toolbars.end(); ++i)
 606         {
 607                 const GLtk::Geometry &geom = (*i)->get_geometry();
 608                 (*i)->set_position(x, window.get_height()-geom.h);
 609                 x += geom.w;
 610         }
 611 }
 612
 613 void Designer::track_properties_response(int)
 614 {
 615         const set<Track *> &tracks = selection.get_tracks();
 616         for(set<Track *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
 617                 update_track_icon(layout_3d->get_track(**i));
 618 }
 619
 620 void Designer::route_name_accept(const string &text)
 621 {
 622         if(cur_route)
 623                 cur_route->set_name(text);
 624 }
 625
 626 void Designer::svg_export_accept(const string &text)
 627 {
 628         SvgExporter svg_exp(*layout);
 629         svg_exp.save(text);
 630 }
 631
 632 string Designer::tooltip(int x, int y)
 633 {
 634         if(Track *track = pick_track(Vector(x*2.0f/window.get_width()-1.0f, y*2.0f/window.get_height()-1.0f, 0)))
 635         {
 636                 const TrackType &ttype = track->get_type();
 637                 string info = format("%d %s", ttype.get_article_number(), ttype.get_description());
 638                 if(mode!=CATALOGUE && abs(track->get_slope())>1e-4)
 639                         info += format(" (slope %.1f%%)", abs(track->get_slope()/ttype.get_total_length()*100));
 640                 if(track->get_turnout_id())
 641                         info += format(" (turnout %d)", track->get_turnout_id());
 642                 else if(track->get_sensor_id())
 643                         info += format(" (sensor %d)", track->get_sensor_id());
 644
 645                 return info;
 646         }
 647
 648         return string();
 649 }
 650
 651 void Designer::clear_paths()
 652 {
 653         const set<Track *> &ltracks = layout->get_tracks();
 654         for(set<Track *>::iterator i=ltracks.begin(); i!=ltracks.end(); ++i)
 655         {
 656                 Track3D &t3d = layout_3d->get_track(**i);
 657                 t3d.get_path().set_mask(0);
 658         }
 659 }
 660
 661 void Designer::show_route(const Route &route)
 662 {
 663         clear_paths();
 664
 665         const set<Track *> &rtracks = route.get_tracks();
 666         for(set<Track *>::iterator i=rtracks.begin(); i!=rtracks.end(); ++i)
 667         {
 668                 Track3D &t3d = layout_3d->get_track(**i);
 669                 t3d.get_path().set_color(GL::Color(0.5, 0.8, 1.0));
 670                 int path = -1;
 671                 if(unsigned tid = (*i)->get_turnout_id())
 672                         path = route.get_turnout(tid);
 673                 if(path>=0)
 674                         t3d.get_path().set_path(path);
 675                 else
 676                         t3d.get_path().set_mask((*i)->get_type().get_paths());
 677         }
 678 }
 679
 680 void Designer::show_zone(const Zone &zone)
 681 {
 682         clear_paths();
 683
 684         const Zone::TrackSet &ztracks = zone.get_tracks();
 685         for(Zone::TrackSet::const_iterator i=ztracks.begin(); i!=ztracks.end(); ++i)
 686         {
 687                 Track3D &t3d = layout_3d->get_track(**i);
 688                 t3d.get_path().set_color(GL::Color(0.8, 1.0, 0.5));
 689                 t3d.get_path().set_mask((*i)->get_type().get_paths());
 690         }
 691 }