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/utils.h>
  18 #include "libr2c2/driver.h"
  19 #include "libr2c2/trackcircuit.h"
  20 #include "libr2c2/tracktype.h"
  21 #include "libr2c2/zone.h"
  22 #include "3d/allocation.h"
  23 #include "3d/path.h"
  24 #include "3d/track.h"
  25 #include "3d/trackcircuit.h"
  26 #include "3d/vehicle.h"
  27 #include "engineer.h"
  28
  29 using namespace std;
  30 using namespace R2C2;
  31 using namespace Msp;
  32
  33 Engineer::Engineer(int argc, char **argv):
  34         options(argc, argv),
  35         window(options.screen_w, options.screen_h, options.fullscreen),
  36         keyboard(window),
  37         mouse(window),
  38         layout(catalogue, (options.driver.empty() ? 0 : Driver::create(options.driver))),
  39         layout_3d(layout),
  40         server(0),
  41         main_view(layout_3d, window.get_width(), window.get_height()),
  42         ui(*this, window, keyboard, mouse),
  43         emergency_blink_state(0)
  44 {
  45         // Setup GUI
  46         window.set_title("Railroad Engineer");
  47         window.signal_close.connect(sigc::bind(sigc::mem_fun(this, &Engineer::exit), 0));
  48
  49         mouse.signal_button_press.connect(sigc::bind_return(sigc::mem_fun(this, &Engineer::button_press), false));
  50         mouse.signal_axis_motion.connect(sigc::bind_return(sigc::mem_fun(this, &Engineer::axis_motion), false));
  51
  52         overlay = new Overlay3D(ui.get_resources().get_default_font());
  53
  54         // Setup railroad control
  55         catalogue.add_source("data/Märklin/H0");
  56         DataFile::load(layout, options.layout_fn);
  57
  58         if(layout.has_driver())
  59         {
  60                 Driver &driver = layout.get_driver();
  61                 driver.signal_halt.connect(sigc::mem_fun(this, &Engineer::halt_event));
  62         }
  63         layout.signal_train_added.connect(sigc::mem_fun(this, &Engineer::train_added));
  64         layout.signal_emergency.connect(sigc::mem_fun(this, &Engineer::emergency));
  65         const set<Block *> &blocks = layout.get_all<Block>();
  66         for(set<Block *>::const_iterator i=blocks.begin(); i!=blocks.end(); ++i)
  67                 if(TrackCircuit *tc = (*i)->get_sensor())
  68                         new TrackCircuit3D(layout_3d, *tc);
  69
  70         const set<Track *> &tracks = layout.get_all<Track>();
  71         for(set<Track *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
  72                 if((*i)->get_type().is_turnout())
  73                         new Path3D(layout_3d.get_3d(**i));
  74
  75         if(FS::exists(options.state_fn))
  76                 DataFile::load(layout, options.state_fn);
  77
  78         if(options.network)
  79         {
  80                 server = new Server(layout);
  81                 server->use_event_dispatcher(event_disp);
  82         }
  83
  84         // Setup 3D view
  85         GL::Pipeline &pipeline = main_view.get_pipeline();
  86
  87         GL::Pipeline::Pass *pass = &pipeline.add_pass("unlit");
  88         pass->set_depth_test(&GL::DepthTest::lequal());
  89         pipeline.add_renderable_for_pass(layout_3d.get_path_scene(), "unlit");
  90
  91         pass = &pipeline.add_pass("overlay");
  92         pass->set_blend(&GL::Blend::alpha());
  93         pipeline.add_renderable_for_pass(*overlay, "overlay");
  94
  95         view_all();
  96
  97         // Catch various signals so we can stop the trains in case we get terminated
  98         catch_signal(SIGINT);
  99         catch_signal(SIGTERM);
 100         catch_signal(SIGSEGV);
 101         catch_signal(SIGILL);
 102         catch_signal(SIGFPE);
 103         catch_signal(SIGABRT);
 104 }
 105
 106 Engineer::~Engineer()
 107 {
 108         if(!options.simulate)
 109         {
 110                 layout.save_dynamic(options.state_fn+".tmp");
 111                 FS::rename(options.state_fn+".tmp", options.state_fn);
 112         }
 113
 114         layout.get_driver().halt(true);
 115         layout.get_driver().flush();
 116
 117         delete overlay;
 118
 119         delete server;
 120 }
 121
 122 int Engineer::main()
 123 {
 124         window.show();
 125
 126         return Application::main();
 127 }
 128
 129 void Engineer::tick()
 130 {
 131         window.get_display().tick();
 132
 133         for(list<Train *>::iterator i=new_trains.begin(); i!=new_trains.end(); ++i)
 134                 process_new_train(**i);
 135         new_trains.clear();
 136
 137         layout.tick(options.sim_speed);
 138         layout_3d.tick();
 139         event_disp.tick(Time::zero);
 140
 141         ui.tick();
 142
 143         Time::TimeStamp t = Time::now();
 144         if(!emergencies.empty() && t>emergency_blink_timeout)
 145         {
 146                 emergency_blink_state = (emergency_blink_state+1)%2;
 147                 GL::Color color(1.0f/(1+emergency_blink_state), 0.0f, 0.0f);
 148                 for(list<TrackChain3D *>::iterator i=emergencies.begin(); i!=emergencies.end(); ++i)
 149                         (*i)->set_color(color);
 150                 emergency_blink_timeout = t+0.5*Time::sec;
 151         }
 152
 153         GL::Framebuffer::system().clear(GL::COLOR_BUFFER_BIT|GL::DEPTH_BUFFER_BIT);
 154
 155         main_view.render();
 156
 157         ui.render();
 158
 159         window.swap_buffers();
 160 }
 161
 162 void Engineer::button_press(unsigned btn)
 163 {
 164         if(btn==1)
 165         {
 166                 Object *obj = pick_object(pointer);
 167                 if(Track *track = dynamic_cast<Track *>(obj))
 168                 {
 169                         if(track->get_type().is_turnout())
 170                         {
 171                                 Block &block = track->get_block();
 172                                 if(block.get_train() && block.get_train()->is_block_critical(block))
 173                                         ui.set_status("Turnout is busy");
 174                                 else
 175                                 {
 176                                         unsigned paths = track->get_type().get_paths();
 177                                         unsigned i = track->get_active_path()+1;
 178                                         while(!(paths&(1<<i)))
 179                                         {
 180                                                 if(!(paths>>i))
 181                                                         i = 0;
 182                                                 else
 183                                                         ++i;
 184                                         }
 185                                         track->set_active_path(i);
 186                                         ui.set_status(format("Turnout %d", track->get_turnout_address()));
 187                                 }
 188                         }
 189                         else if(unsigned saddr = track->get_sensor_address())
 190                         {
 191                                 if(options.simulate)
 192                                         layout.get_driver().set_sensor(saddr, !layout.get_driver().get_sensor(saddr));
 193                                 ui.set_status(format("Sensor %d", saddr));
 194                         }
 195                         else
 196                         {
 197                                 const set<Zone *> &zones = layout.get_all<Zone>();
 198                                 for(set<Zone *>::const_iterator i=zones.begin(); i!=zones.end(); ++i)
 199                                         if((*i)->has_track(*track))
 200                                         {
 201                                                 ui.show_zone(**i);
 202                                                 break;
 203                                         }
 204                         }
 205                 }
 206                 else if(Vehicle *veh = dynamic_cast<Vehicle *>(obj))
 207                         ui.show_train(*veh->get_train());
 208         }
 209 }
 210
 211 void Engineer::axis_motion(unsigned axis, float value, float)
 212 {
 213         if(axis==0)
 214                 pointer.x = value;
 215         if(axis==1)
 216                 pointer.y = value;
 217 }
 218
 219 void Engineer::view_all()
 220 {
 221         const Layout3D::ObjectMap &objects = layout_3d.get_all();
 222
 223         float view_aspect = float(window.get_width())/window.get_height();
 224         float view_height = tan(main_view.get_camera().get_field_of_view()/2.0f)*2.0f;
 225         float best_score = 0;
 226         GL::Vector3 pos;
 227         GL::Vector3 up;
 228         for(Angle angle; angle<Angle::half_turn(); angle+=Angle::from_radians(0.01))
 229         {
 230                 Transform trans = Transform::rotation(-angle, Vector(0, 0, 1));
 231                 BoundingBox bbox;
 232                 for(Layout3D::ObjectMap::const_iterator i=objects.begin(); i!=objects.end(); ++i)
 233                         bbox = bbox|trans.transform(i->second->get_object().get_bounding_box());
 234
 235                 const Vector &minp = bbox.get_minimum_point();
 236                 const Vector &maxp = bbox.get_maximum_point();
 237
 238                 float width = maxp.x-minp.x;
 239                 float height = maxp.y-minp.y;
 240                 float aspect = width/height;
 241                 float score = min(aspect/view_aspect, view_aspect/aspect);
 242
 243                 if(score>best_score)
 244                 {
 245                         best_score = score;
 246
 247                         float size = max(width/view_aspect, height);
 248                         float c = cos(angle);
 249                         float s = sin(angle);
 250                         float x = (minp.x+maxp.x)/2;
 251                         float y = (minp.y+maxp.y)/2;
 252                         float z = max(size*1.05/view_height, 0.15);
 253
 254                         pos = GL::Vector3(c*x-s*y, s*x+c*y, z);
 255                         up = GL::Vector3(-s, c, 0);
 256                 }
 257         }
 258
 259         GL::Camera &camera = main_view.get_camera();
 260         camera.set_position(pos);
 261         camera.set_up_direction(up);
 262         camera.set_look_direction(GL::Vector3(0, 0, -1));
 263         camera.set_aspect(float(window.get_width())/window.get_height());
 264         camera.set_depth_clip(pos.z*0.5, pos.z*1.5);
 265 }
 266
 267 Object *Engineer::pick_object(const Vector &p)
 268 {
 269         const GL::Vector3 &start = main_view.get_camera().get_position();
 270         GL::Vector4 ray = main_view.get_camera().unproject(GL::Vector4(p.x, p.y, 0, 0));
 271
 272         // XXX Do this better; make this function a template?
 273         if(Vehicle *veh = layout.pick<Vehicle>(Ray(start, ray.slice<3>(0))))
 274                 return veh;
 275         return layout.pick<Track>(Ray(start, ray.slice<3>(0)));
 276 }
 277
 278 void Engineer::emergency(Block *block, const string &)
 279 {
 280         if(block)
 281         {
 282                 TrackChain3D *tch3d = new TrackChain3D(layout_3d, *block);
 283                 tch3d->set_color(GL::Color(1.0f, 0.0f, 0.0f));
 284                 tch3d->set_layer(2);
 285                 emergencies.push_back(tch3d);
 286         }
 287 }
 288
 289 void Engineer::halt_event(bool h)
 290 {
 291         if(!h)
 292         {
 293                 for(list<TrackChain3D *>::iterator i=emergencies.begin(); i!=emergencies.end(); ++i)
 294                         delete *i;
 295                 emergencies.clear();
 296         }
 297 }
 298
 299 void Engineer::process_new_train(Train &train)
 300 {
 301         Vehicle3D &loco3d = layout_3d.get_3d(train.get_vehicle(0));
 302         overlay->set_label(loco3d, train.get_name());
 303         train.signal_name_changed.connect(sigc::bind<0>(sigc::mem_fun(overlay, &Overlay3D::set_label), sigc::ref(loco3d)));
 304 }
 305
 306 void Engineer::train_added(Train &train)
 307 {
 308         new_trains.push_back(&train);
 309
 310         GL::Color best_color;
 311         float best_d_sq = 0;
 312         for(unsigned i=0; i<10; ++i)
 313         {
 314                 GL::Color color;
 315                 unsigned h = rand()%3;
 316                 color.r = (h==0 ? 0.0 : rand()*1.0/RAND_MAX);
 317                 color.g = (h==1 ? 0.0 : rand()*1.0/RAND_MAX);
 318                 color.b = (h==2 ? 0.0 : rand()*1.0/RAND_MAX);
 319                 color = color*(1/max(max(color.r, color.g), color.b));
 320                 float min_d_sq = 3;
 321                 for(map<Train *, GL::Color>::const_iterator j=train_colors.begin(); j!=train_colors.end(); ++j)
 322                 {
 323                         float dr = color.r-j->second.r;
 324                         float dg = color.g-j->second.g;
 325                         float db = color.b-j->second.b;
 326                         float d_sq = dr*dr+dg*dg+db*db;
 327                         if(d_sq<min_d_sq)
 328                                 min_d_sq = d_sq;
 329                 }
 330                 if(min_d_sq>best_d_sq)
 331                 {
 332                         best_color = color;
 333                         best_d_sq = min_d_sq;
 334                 }
 335         }
 336         train_colors[&train] = best_color;
 337
 338         Allocation3D *alloc = new Allocation3D(layout_3d, train);
 339         alloc->set_color(best_color);
 340 }
 341
 342 void Engineer::sighandler(int sig)
 343 {
 344         if(sig==SIGSEGV || sig==SIGILL || sig==SIGFPE || sig==SIGABRT)
 345         {
 346                 signal(sig, SIG_DFL);
 347                 IO::print(IO::cerr, "Fatal signal received, terminating\n");
 348                 layout.get_driver().halt(true);
 349                 layout.get_driver().flush();
 350                 raise(sig);
 351         }
 352         else if(sig==SIGTERM || sig==SIGINT)
 353                 exit(0);
 354 }