source/engineer/engineer.cpp

   1 #include <algorithm>
   2 #include <cmath>
   3 #include <cstdlib>
   4 #include <limits>
   5 #include <signal.h>
   6 #include <msp/fs/stat.h>
   7 #include <msp/fs/utils.h>
   8 #include <msp/graphics/display.h>
   9 #include <msp/graphics/window.h>
  10 #include <msp/gl/blend.h>
  11 #include <msp/gl/framebuffer.h>
  12 #include <msp/gl/matrix.h>
  13 #include <msp/gl/misc.h>
  14 #include <msp/gl/tests.h>
  15 #include <msp/io/print.h>
  16 #include <msp/strings/format.h>
  17 #include <msp/time/units.h>
  18 #include <msp/time/utils.h>
  19 #include "libr2c2/driver.h"
  20 #include "libr2c2/trackcircuit.h"
  21 #include "libr2c2/tracktype.h"
  22 #include "3d/path.h"
  23 #include "3d/track.h"
  24 #include "3d/vehicle.h"
  25 #include "engineer.h"
  26 #include "mainwindow.h"
  27 #include "traindialog.h"
  28 #include "trainview.h"
  29
  30 using namespace std;
  31 using namespace R2C2;
  32 using namespace Msp;
  33
  34 Engineer::Engineer(int argc, char **argv):
  35         options(argc, argv),
  36         window(options.screen_w, options.screen_h, options.fullscreen),
  37         keyboard(window),
  38         mouse(window),
  39         ui_res("r2c2.res"),
  40         layout(catalogue, (options.driver.empty() ? 0 : Driver::create(options.driver))),
  41         layout_3d(layout),
  42         server(0),
  43         pipeline(window.get_width(), window.get_height(), false),
  44         picking(false),
  45         picking_track(0),
  46         picking_entry(0),
  47         picking_path(0),
  48         pointer_moved(false)
  49 {
  50         // Setup GUI
  51         window.set_title("Railroad Engineer");
  52         window.signal_close.connect(sigc::bind(sigc::mem_fun(this, &Engineer::exit), 0));
  53
  54         root = new GLtk::Root(ui_res, &window, &keyboard, &mouse);
  55         mouse.signal_button_press.connect(sigc::bind_return(sigc::mem_fun(this, &Engineer::button_press), false));
  56         mouse.signal_axis_motion.connect(sigc::bind_return(sigc::mem_fun(this, &Engineer::axis_motion), false));
  57         root->set_visible(true);
  58
  59         main_wnd = new MainWindow(*this);
  60         root->add(*main_wnd);
  61         main_wnd->autosize();
  62         main_wnd->set_position(0, window.get_height()-main_wnd->get_geometry().h);
  63
  64         overlay = new Overlay3D(ui_res.get_default_font());
  65
  66         // Setup railroad control
  67         DataFile::load(catalogue, "tracks.dat");
  68         DataFile::load(catalogue, "locos.dat");
  69         DataFile::load(catalogue, "wagons.dat");
  70         DataFile::load(layout, options.layout_fn);
  71
  72         layout.signal_train_added.connect(sigc::mem_fun(this, &Engineer::train_added));
  73         layout.signal_block_reserved.connect(sigc::hide<1>(sigc::mem_fun(this, &Engineer::reset_block_color)));
  74         layout.signal_emergency.connect(sigc::mem_fun(this, &Engineer::set_status));
  75         const set<Block *> &blocks = layout.get_all<Block>();
  76         for(set<Block *>::const_iterator i=blocks.begin(); i!=blocks.end(); ++i)
  77                 (*i)->get_sensor().signal_state_changed.connect(sigc::hide(sigc::bind(sigc::mem_fun(this, &Engineer::reset_block_color), sigc::ref(**i))));
  78
  79         if(FS::exists(options.state_fn))
  80                 DataFile::load(layout, options.state_fn);
  81
  82         if(options.network)
  83         {
  84                 server = new Server(layout);
  85                 server->use_event_dispatcher(event_disp);
  86         }
  87
  88         // Setup 3D view
  89         DataFile::load(arrow_mesh, "arrow.mesh");
  90
  91         pipeline.set_camera(&camera);
  92         pipeline.add_renderable_for_pass(layout_3d.get_scene(), 0);
  93         pipeline.add_renderable_for_pass(layout_3d.get_path_scene(), "unlit");
  94         pipeline.add_renderable_for_pass(*overlay, "overlay");
  95
  96         light.set_position(GL::Vector4(0, -0.259, 0.966, 0));
  97         light.set_diffuse(GL::Color(0.9));
  98         lighting.set_ambient(GL::Color(0.4));
  99         lighting.attach(0, light);
 100
 101         GL::Pipeline::Pass *pass = &pipeline.add_pass(0);
 102         pass->set_depth_test(&GL::DepthTest::lequal());
 103         pass->set_lighting(&lighting);
 104
 105         pass = &pipeline.add_pass("unlit");
 106         pass->set_depth_test(&GL::DepthTest::lequal());
 107
 108         pass = &pipeline.add_pass("overlay");
 109         pass->set_blend(&GL::Blend::alpha());
 110
 111         view_all();
 112
 113         // Catch various signals so we can stop the trains in case we get terminated
 114         catch_signal(SIGINT);
 115         catch_signal(SIGTERM);
 116         catch_signal(SIGSEGV);
 117         catch_signal(SIGILL);
 118         catch_signal(SIGFPE);
 119         catch_signal(SIGABRT);
 120 }
 121
 122 Engineer::~Engineer()
 123 {
 124         const map<unsigned, Train *> &trains = layout.get_trains();
 125         for(map<unsigned, Train *>::const_iterator i=trains.begin(); i!=trains.end(); ++i)
 126                 layout.get_driver().set_loco_speed(i->first, 0);
 127         layout.get_driver().flush();
 128
 129         if(!options.simulate)
 130         {
 131                 layout.save_dynamic(options.state_fn+".tmp");
 132                 FS::rename(options.state_fn+".tmp", options.state_fn);
 133         }
 134
 135         delete overlay;
 136         delete root;
 137
 138         delete server;
 139 }
 140
 141 void Engineer::set_status(const string &text)
 142 {
 143         main_wnd->set_status_text(text);
 144         status_timeout = Time::now()+10*Time::sec;
 145 }
 146
 147 void Engineer::add_train_view(TrainView &tv)
 148 {
 149         train_views.push_back(&tv);
 150 }
 151
 152 void Engineer::remove_train_view(TrainView &tv)
 153 {
 154         train_views.erase(remove(train_views.begin(), train_views.end(), &tv), train_views.end());
 155 }
 156
 157 void Engineer::pick(bool with_ep)
 158 {
 159         picking = true;
 160         picking_track = 0;
 161         picking_entry = (with_ep ? 0 : -1);
 162 }
 163
 164 int Engineer::main()
 165 {
 166         window.show();
 167
 168         return Application::main();
 169 }
 170
 171 void Engineer::tick()
 172 {
 173         window.get_display().tick();
 174
 175         for(list<Train *>::iterator i=new_trains.begin(); i!=new_trains.end(); ++i)
 176                 process_new_train(**i);
 177         new_trains.clear();
 178
 179         layout.tick();
 180         event_disp.tick(Time::zero);
 181
 182         for(list<TrainView *>::iterator i=train_views.begin(); i!=train_views.end(); ++i)
 183                 (*i)->prepare();
 184
 185         if(status_timeout && Time::now()>status_timeout)
 186         {
 187                 main_wnd->set_status_text(string());
 188                 status_timeout = Time::TimeStamp();
 189         }
 190
 191         GL::Framebuffer::system().clear(GL::COLOR_BUFFER_BIT|GL::DEPTH_BUFFER_BIT);
 192
 193         pipeline.render();
 194
 195         if(pointer_moved)
 196         {
 197                 pointer_moved = false;
 198
 199                 if(picking)
 200                 {
 201                         Track *track = dynamic_cast<Track *>(pick_object(pointer));
 202                         if(track && track!=picking_track)
 203                         {
 204                                 picking_track = track;
 205                                 if(picking_entry>=0)
 206                                         picking_entry = 0;
 207
 208                                 delete picking_path;
 209                                 picking_path = new Path3D(layout_3d.get_track(*track));
 210                                 if(picking_entry>=0)
 211                                         picking_path->set_mask(picking_track->get_type().get_endpoint(picking_entry).paths);
 212                                 else
 213                                         picking_path->set_mask(picking_track->get_type().get_paths());
 214                                 picking_path->set_color(GL::Color(0));
 215                                 picking_path->set_layer(1);
 216                         }
 217                 }
 218         }
 219
 220         if(picking && picking_track && picking_entry>=0)
 221         {
 222                 camera.apply();
 223                 GL::MatrixStack::Push push_mat(GL::MatrixStack::modelview());
 224
 225                 Snap sn = picking_track->get_snap_node(picking_entry);
 226
 227                 GL::MatrixStack::modelview() *= GL::Matrix::translation(sn.position+GL::Vector3(0, 0, 0.03));
 228                 GL::MatrixStack::modelview() *= GL::Matrix::rotation(sn.rotation+Angle::half_turn(), 0, 0, 1);
 229
 230                 arrow_mesh.draw();
 231         }
 232
 233         root->render();
 234
 235         window.swap_buffers();
 236 }
 237
 238 void Engineer::button_press(unsigned btn)
 239 {
 240         if(picking)
 241         {
 242                 if(btn==1 && picking_track)
 243                 {
 244                         picking = false;
 245                         delete picking_path;
 246                         picking_path = 0;
 247                         signal_pick_done.emit(picking_track, picking_entry);
 248                 }
 249                 else if(btn==3 && picking_entry>=0)
 250                 {
 251                         picking_entry = (picking_entry+1)%picking_track->get_type().get_endpoints().size();
 252                         picking_path->set_mask(picking_track->get_type().get_endpoint(picking_entry).paths);
 253                 }
 254         }
 255         else
 256         {
 257                 Object *obj = pick_object(pointer);
 258                 if(Track *track = dynamic_cast<Track *>(obj))
 259                 {
 260                         if(track->get_turnout_id())
 261                         {
 262                                 Block &block = track->get_block();
 263                                 if(block.get_train() && block.get_train()->is_block_critical(block))
 264                                         set_status("Turnout is busy");
 265                                 else
 266                                 {
 267                                         unsigned paths = track->get_type().get_paths();
 268                                         unsigned i = track->get_active_path()+1;
 269                                         while(!(paths&(1<<i)))
 270                                         {
 271                                                 if(!(paths>>i))
 272                                                         i = 0;
 273                                                 else
 274                                                         ++i;
 275                                         }
 276                                         track->set_active_path(i);
 277                                         set_status(format("Turnout %d", track->get_turnout_id()));
 278                                 }
 279                         }
 280                         if(unsigned sid = track->get_sensor_id())
 281                         {
 282                                 if(options.simulate)
 283                                         layout.get_driver().set_sensor(sid, !layout.get_driver().get_sensor(sid));
 284                                 set_status(format("Sensor %d", sid));
 285                         }
 286                 }
 287                 else if(Vehicle *veh = dynamic_cast<Vehicle *>(obj))
 288                 {
 289                         TrainDialog *dlg = new TrainDialog(*this, *veh->get_train());
 290                         root->add(*dlg);
 291                         dlg->autosize();
 292                 }
 293         }
 294 }
 295
 296 void Engineer::axis_motion(unsigned axis, float value, float)
 297 {
 298         if(axis==0)
 299                 pointer.x = value;
 300         if(axis==1)
 301                 pointer.y = value;
 302         pointer_moved = true;
 303 }
 304
 305 void Engineer::view_all()
 306 {
 307         const Layout3D::TrackMap &tracks = layout_3d.get_tracks();
 308
 309         float view_aspect = float(window.get_width())/window.get_height();
 310         float view_height = tan(camera.get_field_of_view()/2.0f)*2.0f;
 311         float best_score = 0;
 312         GL::Vector3 pos;
 313         GL::Vector3 up;
 314         for(Angle angle; angle<Angle::half_turn(); angle+=Angle::from_radians(0.01))
 315         {
 316                 Transform trans = Transform::rotation(-angle, Vector(0, 0, 1));
 317                 BoundingBox bbox;
 318                 for(Layout3D::TrackMap::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
 319                         bbox = bbox|trans.transform(i->second->get_track().get_bounding_box());
 320
 321                 const Vector &minp = bbox.get_minimum_point();
 322                 const Vector &maxp = bbox.get_maximum_point();
 323
 324                 float width = maxp.x-minp.x;
 325                 float height = maxp.y-minp.y;
 326                 float aspect = width/height;
 327                 float score = min(aspect/view_aspect, view_aspect/aspect);
 328
 329                 if(score>best_score)
 330                 {
 331                         best_score = score;
 332
 333                         float size = max(width/view_aspect, height);
 334                         float c = cos(angle);
 335                         float s = sin(angle);
 336                         float x = (minp.x+maxp.x)/2;
 337                         float y = (minp.y+maxp.y)/2;
 338                         float z = max(size*1.05/view_height, 0.15);
 339
 340                         pos = GL::Vector3(c*x-s*y, s*x+c*y, z);
 341                         up = GL::Vector3(-s, c, 0);
 342                 }
 343         }
 344
 345         camera.set_position(pos);
 346         camera.set_up_direction(up);
 347         camera.set_look_direction(GL::Vector3(0, 0, -1));
 348         camera.set_aspect(float(window.get_width())/window.get_height());
 349         camera.set_depth_clip(pos.z*0.5, pos.z*1.5);
 350 }
 351
 352 void Engineer::set_block_color(const Block &block, const GL::Color &color)
 353 {
 354         const set<Track *> &tracks = block.get_tracks();
 355         for(set<Track *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
 356                 layout_3d.get_track(**i).get_path().set_color(color);
 357 }
 358
 359 void Engineer::reset_block_color(const Block &block)
 360 {
 361         bool active = block.get_sensor().get_state()>Sensor::INACTIVE;
 362
 363         if(block.get_train())
 364         {
 365                 GL::Color color;
 366                 map<Train *, GL::Color>::iterator i = train_colors.find(block.get_train());
 367                 if(i!=train_colors.end())
 368                         color = i->second;
 369
 370                 if(active)
 371                         set_block_color(block, color*0.6);
 372                 else
 373                         set_block_color(block, color*0.5+0.5);
 374         }
 375         else if(active)
 376                 set_block_color(block, GL::Color(0.6));
 377         else
 378                 set_block_color(block, GL::Color(1));
 379 }
 380
 381 Object *Engineer::pick_object(const Vector &p)
 382 {
 383         const GL::Vector3 &start = camera.get_position();
 384         GL::Vector4 ray = camera.unproject(GL::Vector4(p.x, p.y, 0, 0));
 385
 386         // XXX Do this better; make this function a template?
 387         if(Vehicle *veh = layout.pick<Vehicle>(Ray(start, Vector(ray))))
 388                 return veh;
 389         return layout.pick<Track>(Ray(start, Vector(ray)));
 390 }
 391
 392 void Engineer::process_new_train(Train &train)
 393 {
 394         Vehicle3D &loco3d = layout_3d.get_vehicle(train.get_vehicle(0));
 395         overlay->set_label(loco3d, train.get_name());
 396         train.signal_name_changed.connect(sigc::bind<0>(sigc::mem_fun(overlay, &Overlay3D::set_label), sigc::ref(loco3d)));
 397 }
 398
 399 void Engineer::train_added(Train &train)
 400 {
 401         new_trains.push_back(&train);
 402
 403         GL::Color best_color;
 404         float best_d_sq = 0;
 405         for(unsigned i=0; i<10; ++i)
 406         {
 407                 GL::Color color;
 408                 unsigned h = rand()%3;
 409                 color.r = (h==0 ? 0.0 : rand()*1.0/RAND_MAX);
 410                 color.g = (h==1 ? 0.0 : rand()*1.0/RAND_MAX);
 411                 color.b = (h==2 ? 0.0 : rand()*1.0/RAND_MAX);
 412                 color = color*(1/max(max(color.r, color.g), color.b));
 413                 float min_d_sq = 3;
 414                 for(map<Train *, GL::Color>::const_iterator j=train_colors.begin(); j!=train_colors.end(); ++j)
 415                 {
 416                         float dr = color.r-j->second.r;
 417                         float dg = color.g-j->second.g;
 418                         float db = color.b-j->second.b;
 419                         float d_sq = dr*dr+dg*dg+db*db;
 420                         if(d_sq<min_d_sq)
 421                                 min_d_sq = d_sq;
 422                 }
 423                 if(min_d_sq>best_d_sq)
 424                 {
 425                         best_color = color;
 426                         best_d_sq = min_d_sq;
 427                 }
 428         }
 429         train_colors[&train] = best_color;
 430 }
 431
 432 void Engineer::sighandler(int sig)
 433 {
 434         if(sig==SIGSEGV || sig==SIGILL || sig==SIGFPE || sig==SIGABRT)
 435         {
 436                 signal(sig, SIG_DFL);
 437                 IO::print(IO::cerr, "Fatal signal received, terminating\n");
 438                 const map<unsigned, Train *> &trains = layout.get_trains();
 439                 for(map<unsigned, Train *>::const_iterator i=trains.begin(); i!=trains.end(); ++i)
 440                         layout.get_driver().set_loco_speed(i->first, 0);
 441                 layout.get_driver().flush();
 442                 raise(sig);
 443         }
 444         else if(sig==SIGTERM || sig==SIGINT)
 445                 exit(0);
 446 }