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
 142         camera_ctl = new CameraController(*main_view, keyboard, mouse);
 143         cat_view->get_camera().set_look_direction(GL::Vector3(0, 0.13053, -0.99144));
 144         cat_view->view_all(true);
 145         main_view->view_all();
 146
 147         const Layout3D::TrackMap &tracks = layout_3d->get_tracks();
 148         for(Layout3D::TrackMap::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
 149                 update_track_icon(*i->second);
 150 }
 151
 152 Designer::~Designer()
 153 {
 154         for(vector<Toolbar *>::iterator i=toolbars.begin(); i!=toolbars.end(); ++i)
 155                 delete *i;
 156         delete camera_ctl;
 157         delete track_wrap;
 158         delete overlay;
 159         delete main_view;
 160         delete base_object;
 161         delete layout_3d;
 162         delete layout;
 163         delete cat_view;
 164         delete cat_layout_3d;
 165 }
 166
 167 int Designer::main()
 168 {
 169         window.show();
 170
 171         mode = SELECT;
 172
 173         return Application::main();
 174 }
 175
 176 void Designer::save()
 177 {
 178         InputDialog *input = new InputDialog(*this, "Save layout", filename);
 179         input->signal_accept.connect(sigc::mem_fun(layout, &Layout::save));
 180 }
 181
 182 void Designer::quit()
 183 {
 184         exit(0);
 185 }
 186
 187 void Designer::new_track()
 188 {
 189         if(mode!=SELECT)
 190                 return;
 191
 192         mode = CATALOGUE;
 193         lbl_status->set_text("Select new track or press Esc to cancel");
 194 }
 195
 196 void Designer::erase_tracks()
 197 {
 198         if(mode!=SELECT)
 199                 return;
 200
 201         set<Track *> tracks = selection.get_tracks();
 202         selection.clear();
 203         for(set<Track *>::iterator i=tracks.begin(); i!=tracks.end(); ++i)
 204         {
 205                 overlay->clear(layout_3d->get_track(**i));
 206                 delete *i;
 207         }
 208 }
 209
 210 void Designer::track_properties()
 211 {
 212         if(mode!=SELECT || selection.empty())
 213                 return;
 214
 215         TrackProperties *track_prop = new TrackProperties(selection);
 216         root.add(*track_prop);
 217         const GLtk::Geometry &root_geom = root.get_geometry();
 218         const GLtk::Geometry &dlg_geom = track_prop->get_geometry();
 219         track_prop->set_position((root_geom.w-dlg_geom.w)/2, (root_geom.h-dlg_geom.h)/2);
 220
 221         track_prop->signal_response.connect(sigc::mem_fun(this, &Designer::track_properties_response));
 222 }
 223
 224 void Designer::extend_track()
 225 {
 226         if(mode!=SELECT)
 227                 return;
 228
 229         if(manipulator.start_extend())
 230                 mode = MANIPULATE;
 231 }
 232
 233 void Designer::connect_tracks()
 234 {
 235         if(mode!=SELECT)
 236                 return;
 237
 238         manipulator.connect();
 239 }
 240
 241 void Designer::flatten_tracks()
 242 {
 243         if(mode!=SELECT)
 244                 return;
 245
 246         manipulator.flatten();
 247 }
 248
 249 void Designer::svg_export()
 250 {
 251         InputDialog *input = new InputDialog(*this, "SVG export", FS::basepart(filename)+".svg");
 252         input->signal_accept.connect(sigc::mem_fun(this, &Designer::svg_export_accept));
 253 }
 254
 255 void Designer::edit_route(Route *r)
 256 {
 257         cur_route = r;
 258         cur_zone = 0;
 259         if(cur_route)
 260                 show_route(*cur_route);
 261         else
 262                 clear_paths();
 263 }
 264
 265 void Designer::rename_route()
 266 {
 267         if(mode!=SELECT || !cur_route)
 268                 return;
 269
 270         InputDialog *input = new InputDialog(*this, "Route name", cur_route->get_name());
 271         input->signal_accept.connect(sigc::mem_fun(this, &Designer::route_name_accept));
 272 }
 273
 274 void Designer::add_selection_to_route()
 275 {
 276         if(!cur_route)
 277                 return;
 278
 279         try
 280         {
 281                 cur_route->add_tracks(selection.get_tracks());
 282         }
 283         catch(const exception &e)
 284         {
 285                 lbl_status->set_text(e.what());
 286         }
 287
 288         show_route(*cur_route);
 289 }
 290
 291 void Designer::edit_zone(Zone *z)
 292 {
 293         cur_zone = z;
 294         cur_route = 0;
 295         if(cur_zone)
 296                 show_zone(*cur_zone);
 297         else
 298                 clear_paths();
 299 }
 300
 301 void Designer::zone_properties()
 302 {
 303         if(!cur_zone)
 304                 return;
 305
 306         ZoneProperties *zone_prop = new ZoneProperties(*cur_zone);
 307         root.add(*zone_prop);
 308         const GLtk::Geometry &root_geom = root.get_geometry();
 309         const GLtk::Geometry &dlg_geom = zone_prop->get_geometry();
 310         zone_prop->set_position((root_geom.w-dlg_geom.w)/2, (root_geom.h-dlg_geom.h)/2);
 311 }
 312
 313 void Designer::add_selection_to_zone()
 314 {
 315         if(!cur_zone)
 316                 return;
 317
 318         try
 319         {
 320                 cur_zone->add_tracks(selection.get_tracks());
 321         }
 322         catch(const exception &e)
 323         {
 324                 lbl_status->set_text(e.what());
 325         }
 326
 327         show_zone(*cur_zone);
 328 }
 329
 330 Vector Designer::map_pointer_to_ground(const Vector &p)
 331 {
 332         GL::Vector4 vec = main_view->get_camera().unproject(GL::Vector4(p.x, p.y, 0, 0));
 333         const GL::Vector3 &pos = main_view->get_camera().get_position();
 334
 335         return Vector(pos.x-vec.x*pos.z/vec.z, pos.y-vec.y*pos.z/vec.z);
 336 }
 337
 338 void Designer::tick()
 339 {
 340         const Msp::Time::TimeStamp t = Msp::Time::now();
 341         float dt = (t-last_tick)/Msp::Time::sec;
 342         last_tick = t;
 343
 344         if(mode==MANIPULATE_DONE)
 345                 mode = SELECT;
 346
 347         window.tick();
 348         root.tick();
 349         camera_ctl->tick(dt);
 350
 351         for(list<Track *>::iterator i=new_tracks.begin(); i!=new_tracks.end(); ++i)
 352                 layout_3d->get_track(**i).get_path().set_mask(0);
 353         new_tracks.clear();
 354
 355         render();
 356
 357         window.swap_buffers();
 358 }
 359
 360 void Designer::key_press(unsigned key)
 361 {
 362         bool shift = keyboard.get_button_state(Input::KEY_SHIFT_L) || keyboard.get_button_state(Input::KEY_SHIFT_R);
 363
 364         if(key==Msp::Input::KEY_N && shift)
 365                 extend_track();
 366         else if(key==Msp::Input::KEY_N)
 367                 new_track();
 368         else if(key==Msp::Input::KEY_G)
 369         {
 370                 manipulator.start_move();
 371                 mode = MANIPULATE;
 372         }
 373         else if(key==Msp::Input::KEY_R)
 374         {
 375                 manipulator.start_rotate();
 376                 mode = MANIPULATE;
 377         }
 378         else if(key==Msp::Input::KEY_D)
 379         {
 380                 manipulator.duplicate();
 381                 manipulator.start_move();
 382                 mode = MANIPULATE;
 383         }
 384         else if(key==Msp::Input::KEY_W)
 385                 save();
 386         else if(key==Msp::Input::KEY_PLUS)
 387                 selection.select_more();
 388         else if(key==Msp::Input::KEY_L && shift)
 389                 selection.select_blocks();
 390         else if(key==Msp::Input::KEY_L)
 391                 selection.select_linked();
 392         else if(key==Msp::Input::KEY_M)
 393         {
 394                 measure.start();
 395                 mode = MEASURE;
 396         }
 397         else if(key==Msp::Input::KEY_Z)
 398         {
 399                 manipulator.start_elevate();
 400                 mode = MANIPULATE;
 401         }
 402         else if(key==Msp::Input::KEY_ESC)
 403         {
 404                 if(mode==MANIPULATE)
 405                         manipulator.cancel();
 406                 else if(mode==CATALOGUE)
 407                         mode = SELECT;
 408                 else
 409                         selection.clear();
 410         }
 411         else if(key==Msp::Input::KEY_X)
 412                 erase_tracks();
 413         else if(key==Msp::Input::KEY_F && shift)
 414         {
 415                 const set<Track *> &tracks = selection.get_tracks();
 416                 const set<Track *> &ltracks = layout->get_tracks();
 417                 for(set<Track *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
 418                 {
 419                         (*i)->set_flex(!(*i)->get_flex());
 420                         (*i)->break_links();
 421                         for(set<Track *>::const_iterator j=ltracks.begin(); j!=ltracks.end(); ++j)
 422                                 if(*j!=*i)
 423                                         (*i)->snap_to(**j, true);
 424
 425                         update_track_icon(layout_3d->get_track(**i));
 426                 }
 427         }
 428         else if(key==Msp::Input::KEY_F)
 429                 flatten_tracks();
 430         else if(key==Msp::Input::KEY_E && shift)
 431                 manipulator.even_slope(true);
 432         else if(key==Msp::Input::KEY_E)
 433                 manipulator.even_slope();
 434         else if(key==Msp::Input::KEY_A)
 435         {
 436                 if(cur_route)
 437                         add_selection_to_route();
 438                 else if(cur_zone)
 439                         add_selection_to_zone();
 440         }
 441         else if(key==Msp::Input::KEY_C)
 442                 connect_tracks();
 443         else if(key==Msp::Input::KEY_V)
 444                 svg_export();
 445         else if(key==Msp::Input::KEY_P)
 446                 track_properties();
 447 }
 448
 449 void Designer::button_press(unsigned btn)
 450 {
 451         bool shift = keyboard.get_button_state(Input::KEY_SHIFT_L) || keyboard.get_button_state(Input::KEY_SHIFT_R);
 452
 453         Vector pointer(mouse.get_axis_value(0), mouse.get_axis_value(1));
 454         Vector ground = map_pointer_to_ground(pointer);
 455
 456         if(mode==CATALOGUE)
 457         {
 458                 if(btn==1)
 459                 {
 460                         Track *ctrack = pick_track(pointer);
 461                         if(ctrack)
 462                         {
 463                                 Track *track = new Track(*layout, ctrack->get_type());
 464                                 track->set_position(ground);
 465
 466                                 selection.clear();
 467                                 selection.add_track(track);
 468
 469                                 mode = SELECT;
 470                         }
 471                 }
 472                 else
 473                         mode = SELECT;
 474         }
 475         else if(mode==SELECT)
 476         {
 477                 if(btn==1)
 478                 {
 479                         Track *track = pick_track(pointer);
 480                         if(track)
 481                         {
 482                                 if(!shift)
 483                                         selection.clear();
 484                                 selection.toggle_track(track);
 485                         }
 486                 }
 487         }
 488         else if(mode==MEASURE)
 489                 measure.button_press(ground.x, ground.y, btn);
 490 }
 491
 492 void Designer::axis_motion(unsigned, float, float)
 493 {
 494         Vector pointer(mouse.get_axis_value(0), mouse.get_axis_value(1));
 495         float wx = pointer.x*window.get_width();
 496         float wy = pointer.y*window.get_height();
 497
 498         if(!root.get_child_at(wx, wy))
 499         {
 500                 Vector ground = map_pointer_to_ground(pointer);
 501                 measure.pointer_motion(ground.x, ground.y);
 502         }
 503 }
 504
 505 void Designer::render()
 506 {
 507         GL::Framebuffer::system().clear(GL::COLOR_BUFFER_BIT|GL::DEPTH_BUFFER_BIT);
 508
 509         View3D *view = (mode==CATALOGUE ? cat_view : main_view);
 510         view->render();
 511         if(mode==MEASURE)
 512         {
 513                 GL::Bind bind_depth(GL::DepthTest::lequal());
 514                 measure.render();
 515         }
 516
 517         root.render();
 518         // XXX Should fix GLtk so this would not be needed
 519         glColor3f(1.0, 1.0, 1.0);
 520 }
 521
 522 void Designer::track_added(Track &trk)
 523 {
 524         new_tracks.push_back(&trk);
 525 }
 526
 527 void Designer::track_removed(Track &trk)
 528 {
 529         list<Track *>::iterator i = find(new_tracks.begin(), new_tracks.end(), &trk);
 530         if(i!=new_tracks.end())
 531                 new_tracks.erase(i);
 532 }
 533
 534 Track *Designer::pick_track(const Vector &pointer)
 535 {
 536         View3D &view = *(mode==CATALOGUE ? cat_view : main_view);
 537         const GL::Vector3 &cpos = view.get_camera().get_position();
 538         GL::Vector4 cray = view.get_camera().unproject(GL::Vector4(pointer.x, pointer.y, 0, 0));
 539
 540         return view.get_layout().get_layout().pick_track(Vector(cpos.x, cpos.y, cpos.z), Vector(cray.x, cray.y, cray.z));
 541 }
 542
 543 void Designer::update_track_icon(Track3D &track)
 544 {
 545         overlay->clear(track);
 546
 547         if(track.get_track().get_flex())
 548                 overlay->add_graphic(track, "flex");
 549
 550         if(unsigned sid = track.get_track().get_sensor_id())
 551         {
 552                 overlay->add_graphic(track, "sensor");
 553                 overlay->set_label(track, lexical_cast<string>(sid));
 554         }
 555         else if(unsigned tid = track.get_track().get_turnout_id())
 556         {
 557                 if(tid<0x800)
 558                 {
 559                         overlay->add_graphic(track, "turnout");
 560                         overlay->set_label(track, lexical_cast<string>(tid));
 561                 }
 562         }
 563 }
 564
 565 void Designer::selection_changed()
 566 {
 567         const set<Track *> &tracks = selection.get_tracks();
 568         if(tracks.empty())
 569                 lbl_status->set_text(string());
 570         else
 571         {
 572                 float len = 0;
 573                 for(set<Track *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
 574                         len += (*i)->get_type().get_total_length();
 575                 lbl_status->set_text(format("%.2fm of track selected\n", len));
 576         }
 577 }
 578
 579 void Designer::manipulation_status(const string &status)
 580 {
 581         lbl_status->set_text(status);
 582 }
 583
 584 void Designer::manipulation_done(bool)
 585 {
 586         mode = MANIPULATE_DONE;
 587         selection_changed();
 588 }
 589
 590 void Designer::measure_changed()
 591 {
 592         float pard = measure.get_parallel_distance()*1000;
 593         float perpd = measure.get_perpendicular_distance()*1000;
 594         float d = sqrt(pard*pard+perpd*perpd);
 595         float adiff = measure.get_angle_difference()*180/M_PI;
 596         string info = format("Par %.1fmm - Perp %.1fmm - Total %.1fmm - Angle %.1f°", pard, perpd, d, adiff);
 597         lbl_status->set_text(info);
 598 }
 599
 600 void Designer::measure_done()
 601 {
 602         mode = SELECT;
 603         selection_changed();
 604 }
 605
 606 void Designer::arrange_toolbars()
 607 {
 608         unsigned x = 0;
 609         for(vector<Toolbar *>::iterator i=toolbars.begin(); i!=toolbars.end(); ++i)
 610         {
 611                 const GLtk::Geometry &geom = (*i)->get_geometry();
 612                 (*i)->set_position(x, window.get_height()-geom.h);
 613                 x += geom.w;
 614         }
 615 }
 616
 617 void Designer::track_properties_response(int)
 618 {
 619         const set<Track *> &tracks = selection.get_tracks();
 620         for(set<Track *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
 621                 update_track_icon(layout_3d->get_track(**i));
 622 }
 623
 624 void Designer::route_name_accept(const string &text)
 625 {
 626         if(cur_route)
 627                 cur_route->set_name(text);
 628 }
 629
 630 void Designer::svg_export_accept(const string &text)
 631 {
 632         SvgExporter svg_exp(*layout);
 633         svg_exp.save(text);
 634 }
 635
 636 string Designer::tooltip(int x, int y)
 637 {
 638         if(Track *track = pick_track(Vector(x*2.0f/window.get_width()-1.0f, y*2.0f/window.get_height()-1.0f, 0)))
 639         {
 640                 const TrackType &ttype = track->get_type();
 641                 string info = format("%d %s", ttype.get_article_number(), ttype.get_description());
 642                 if(mode!=CATALOGUE && abs(track->get_slope())>1e-4)
 643                         info += format(" (slope %.1f%%)", abs(track->get_slope()/ttype.get_total_length()*100));
 644                 if(track->get_turnout_id())
 645                         info += format(" (turnout %d)", track->get_turnout_id());
 646                 else if(track->get_sensor_id())
 647                         info += format(" (sensor %d)", track->get_sensor_id());
 648
 649                 return info;
 650         }
 651
 652         return string();
 653 }
 654
 655 void Designer::clear_paths()
 656 {
 657         const set<Track *> &ltracks = layout->get_tracks();
 658         for(set<Track *>::iterator i=ltracks.begin(); i!=ltracks.end(); ++i)
 659         {
 660                 Track3D &t3d = layout_3d->get_track(**i);
 661                 t3d.get_path().set_mask(0);
 662         }
 663 }
 664
 665 void Designer::show_route(const Route &route)
 666 {
 667         clear_paths();
 668
 669         const set<Track *> &rtracks = route.get_tracks();
 670         for(set<Track *>::iterator i=rtracks.begin(); i!=rtracks.end(); ++i)
 671         {
 672                 Track3D &t3d = layout_3d->get_track(**i);
 673                 t3d.get_path().set_color(GL::Color(0.5, 0.8, 1.0));
 674                 int path = -1;
 675                 if(unsigned tid = (*i)->get_turnout_id())
 676                         path = route.get_turnout(tid);
 677                 if(path>=0)
 678                         t3d.get_path().set_path(path);
 679                 else
 680                         t3d.get_path().set_mask((*i)->get_type().get_paths());
 681         }
 682 }
 683
 684 void Designer::show_zone(const Zone &zone)
 685 {
 686         clear_paths();
 687
 688         const Zone::TrackSet &ztracks = zone.get_tracks();
 689         for(Zone::TrackSet::const_iterator i=ztracks.begin(); i!=ztracks.end(); ++i)
 690         {
 691                 Track3D &t3d = layout_3d->get_track(**i);
 692                 t3d.get_path().set_color(GL::Color(0.8, 1.0, 0.5));
 693                 t3d.get_path().set_mask((*i)->get_type().get_paths());
 694         }
 695 }