source/libr2c2/track.cpp

   1 #include <cmath>
   2 #include "block.h"
   3 #include "catalogue.h"
   4 #include "driver.h"
   5 #include "layout.h"
   6 #include "track.h"
   7 #include "tracktype.h"
   8
   9 using namespace std;
  10 using namespace Msp;
  11
  12 namespace R2C2 {
  13
  14 Track::Track(Layout &l, const TrackType &t):
  15         Object(l),
  16         type(t),
  17         block(0),
  18         slope(0),
  19         flex(false),
  20         turnout_id(0),
  21         sensor_id(0),
  22         links(type.get_endpoints().size()),
  23         active_path(0),
  24         path_changing(false)
  25 {
  26         if(type.is_turnout())
  27                 turnout_id = layout.allocate_turnout_id();
  28
  29         layout.add_track(*this);
  30
  31         if(layout.has_driver())
  32                 layout.get_driver().signal_turnout.connect(sigc::mem_fun(this, &Track::turnout_event));
  33
  34         for(unsigned paths = type.get_paths(); !(paths&1); ++active_path, paths>>=1) ;
  35 }
  36
  37 Track::~Track()
  38 {
  39         break_links();
  40         layout.remove_track(*this);
  41 }
  42
  43 Track *Track::clone(Layout *to_layout) const
  44 {
  45         Track *track = new Track((to_layout ? *to_layout : layout), type);
  46         track->set_position(position);
  47         track->set_rotation(rotation);
  48         return track;
  49 }
  50
  51 void Track::set_block(Block *b)
  52 {
  53         if(b && !b->has_track(*this))
  54                 throw logic_error("track not in block");
  55         if(!b && block && block->has_track(*this))
  56                 throw logic_error("track still in block");
  57
  58         block = b;
  59 }
  60
  61 Block &Track::get_block() const
  62 {
  63         if(!block)
  64                 throw logic_error("!block");
  65
  66         return *block;
  67 }
  68
  69 void Track::set_position(const Vector &p)
  70 {
  71         position = p;
  72 }
  73
  74 void Track::set_rotation(float r)
  75 {
  76         rotation = r;
  77         while(rotation<0)
  78                 rotation += M_PI*2;
  79         while(rotation>M_PI*2)
  80                 rotation -= M_PI*2;
  81 }
  82
  83 void Track::set_slope(float s)
  84 {
  85         if(links.size()!=2)
  86                 return;
  87
  88         slope = s;
  89 }
  90
  91 void Track::set_flex(bool f)
  92 {
  93         flex = f;
  94 }
  95
  96 void Track::check_slope()
  97 {
  98         if(links.size()!=2)
  99                 return;
 100
 101         if(links[0] && links[1])
 102         {
 103                 Vector epp0 = links[0]->get_snap_node(links[0]->get_link_slot(*this)).position;
 104                 Vector epp1 = links[1]->get_snap_node(links[1]->get_link_slot(*this)).position;
 105                 position.z = epp0.z;
 106                 slope = epp1.z-position.z;
 107         }
 108         else
 109         {
 110                 slope = 0;
 111                 if(links[0])
 112                 {
 113                         Vector epp = links[0]->get_snap_node(links[0]->get_link_slot(*this)).position;
 114                         position.z = epp.z;
 115                 }
 116                 else if(links[1])
 117                 {
 118                         Vector epp = links[1]->get_snap_node(links[1]->get_link_slot(*this)).position;
 119                         position.z = epp.z;
 120                 }
 121         }
 122 }
 123
 124 void Track::set_turnout_id(unsigned i)
 125 {
 126         if(!type.is_turnout())
 127                 throw logic_error("not a turnout");
 128
 129         turnout_id = i;
 130         layout.create_blocks(*this);
 131         layout.update_routes();
 132         if(layout.has_driver() && turnout_id)
 133                 layout.get_driver().add_turnout(turnout_id, type);
 134 }
 135
 136 void Track::set_sensor_id(unsigned i)
 137 {
 138         if(type.is_turnout())
 139                 throw logic_error("is a turnout");
 140
 141         sensor_id = i;
 142         layout.create_blocks(*this);
 143         if(layout.has_driver() && sensor_id)
 144                 layout.get_driver().add_sensor(sensor_id);
 145 }
 146
 147 void Track::set_active_path(unsigned p)
 148 {
 149         if(!turnout_id)
 150                 throw logic_error("not a turnout");
 151         if(!(type.get_paths()&(1<<p)))
 152                 throw invalid_argument("Track::set_active_path");
 153
 154         path_changing = true;
 155         layout.get_driver().set_turnout(turnout_id, p);
 156 }
 157
 158 TrackPoint Track::get_point(unsigned epi, unsigned path, float d) const
 159 {
 160         TrackPoint p = type.get_point(epi, path, d);
 161         float c = cos(rotation);
 162         float s = sin(rotation);
 163
 164         p.pos = Vector(position.x+c*p.pos.x-s*p.pos.y, position.y+s*p.pos.x+c*p.pos.y, position.z);
 165         p.dir += rotation;
 166         if(type.get_endpoints().size()==2)
 167         {
 168                 float len = type.get_path_length(path);
 169                 float grade = slope/len;
 170                 if(epi==0)
 171                 {
 172                         p.pos.z += grade*d;
 173                         p.grade = grade;
 174                 }
 175                 else
 176                 {
 177                         p.pos.z += slope-grade*d;
 178                         p.grade = -grade;
 179                 }
 180         }
 181
 182         return p;
 183 }
 184
 185 TrackPoint Track::get_point(unsigned epi, float d) const
 186 {
 187         return get_point(epi, active_path, d);
 188 }
 189
 190 unsigned Track::get_n_snap_nodes() const
 191 {
 192         return type.get_endpoints().size();
 193 }
 194
 195 Snap Track::get_snap_node(unsigned i) const
 196 {
 197         const vector<TrackType::Endpoint> &eps = type.get_endpoints();
 198         if(i>=eps.size())
 199                 throw out_of_range("Track::get_snap_node");
 200
 201         Snap result;
 202         const TrackType::Endpoint &ep = eps[i];
 203
 204         float c = cos(rotation);
 205         float s = sin(rotation);
 206
 207         result.position = Vector(position.x+c*ep.pos.x-s*ep.pos.y, position.y+s*ep.pos.x+c*ep.pos.y, position.z);
 208         if(eps.size()==2 && i==1)
 209                 result.position.z += slope;
 210
 211         result.rotation = rotation+ep.dir;
 212
 213         return result;
 214 }
 215
 216 bool Track::snap(Snap &sn, float limit, SnapType what) const
 217 {
 218         if(Object::snap(sn, limit, what))
 219                 return true;
 220
 221         if(what&SNAP_SEGMENT)
 222         {
 223                 Vector local(sn.position.x-position.x, sn.position.y-position.y, sn.position.z-position.z);
 224                 float c = cos(rotation);
 225                 float s = sin(rotation);
 226                 local = Vector(c*local.x+s*local.y, c*local.y-s*local.x, local.z);
 227
 228                 TrackPoint tp = type.get_nearest_point(local);
 229                 Vector d(local.x-tp.pos.x, local.y-tp.pos.y, local.z-tp.pos.z);
 230                 if(d.x*d.x+d.y*d.y+d.z*d.z<=limit*limit)
 231                 {
 232                         sn.position = Vector(position.x+tp.pos.x*c-tp.pos.y*s, position.y+tp.pos.y*c+tp.pos.x*s, position.z+tp.pos.z);
 233                         sn.rotation = tp.dir+rotation;
 234                         return true;
 235                 }
 236         }
 237
 238         return false;
 239 }
 240
 241 SnapType Track::get_default_snap_type_to(const Object &other) const
 242 {
 243         if(dynamic_cast<const Track *>(&other))
 244                 return SNAP_NODE;
 245
 246         return NO_SNAP;
 247 }
 248
 249 unsigned Track::get_n_link_slots() const
 250 {
 251         return links.size();
 252 }
 253
 254 Track *Track::get_link(unsigned i) const
 255 {
 256         if(i>=links.size())
 257                 throw out_of_range("Track::get_link");
 258
 259         return links[i];
 260 }
 261
 262 int Track::get_link_slot(const Object &other) const
 263 {
 264         for(unsigned i=0; i<links.size(); ++i)
 265                 if(links[i]==&other)
 266                         return i;
 267
 268         return -1;
 269 }
 270
 271 bool Track::link_to(Object &other)
 272 {
 273         Track *otrack = dynamic_cast<Track *>(&other);
 274         if(!otrack)
 275                 return false;
 276
 277         float limit = layout.get_catalogue().get_gauge();
 278         if(!flex && !otrack->get_flex())
 279                 limit /= 10;
 280         limit *= limit;
 281
 282         unsigned nsn = get_n_snap_nodes();
 283         unsigned other_nsn = other.get_n_snap_nodes();
 284         for(unsigned i=0; i<nsn; ++i)
 285         {
 286                 Snap sn = get_snap_node(i);
 287                 for(unsigned j=0; j<other_nsn; ++j)
 288                 {
 289                         Snap osn = other.get_snap_node(j);
 290                         Vector d(osn.position.x-sn.position.x, osn.position.y-sn.position.y, osn.position.z-sn.position.z);
 291                         float da = osn.rotation-sn.rotation-M_PI;
 292                         while(da<-M_PI)
 293                                 da += M_PI*2;
 294                         while(da>M_PI)
 295                                 da -= M_PI*2;
 296
 297                         if(d.x*d.x+d.y*d.y<limit && d.z*d.z<limit && da>-0.01 && da<0.01)
 298                         {
 299                                 break_link(i);
 300                                 links[i] = otrack;
 301                                 otrack->links[j] = this;
 302                                 layout.create_blocks(*this);
 303
 304                                 signal_link_changed.emit(i, otrack);
 305                                 otrack->signal_link_changed.emit(j, this);
 306                                 return true;
 307                         }
 308                 }
 309         }
 310
 311         return false;
 312 }
 313
 314 bool Track::break_link(unsigned i)
 315 {
 316         if(i>=links.size())
 317                 throw out_of_range("Track::break_link");
 318
 319         Track *other = links[i];
 320         if(!other)
 321                 return false;
 322
 323         links[i] = 0;
 324         other->break_link(*this);
 325         // XXX Creates the blocks twice, because the other track calls this too
 326         layout.create_blocks(*this);
 327         signal_link_changed.emit(i, 0);
 328
 329         return true;
 330 }
 331
 332 bool Track::collide_ray(const Vector &start, const Vector &ray) const
 333 {
 334         Vector local_start(start.x-position.x, start.y-position.y, start.z-position.z);
 335         float c = cos(rotation);
 336         float s = sin(rotation);
 337         local_start = Vector(c*local_start.x+s*local_start.y, c*local_start.y-s*local_start.x, local_start.z);
 338         Vector local_ray(c*ray.x+s*ray.y, c*ray.y-s*ray.x, ray.z);
 339
 340         float width = layout.get_catalogue().get_ballast_profile().get_width();
 341
 342         return type.collide_ray(local_start, local_ray, width);
 343 }
 344
 345 void Track::save(list<DataFile::Statement> &st) const
 346 {
 347         st.push_back((DataFile::Statement("position"), position.x, position.y, position.z));
 348         st.push_back((DataFile::Statement("rotation"), rotation));
 349         st.push_back((DataFile::Statement("slope"), slope));
 350         if(turnout_id)
 351                 st.push_back((DataFile::Statement("turnout_id"), turnout_id));
 352         if(sensor_id)
 353                 st.push_back((DataFile::Statement("sensor_id"), sensor_id));
 354         if(flex)
 355                 st.push_back((DataFile::Statement("flex"), true));
 356 }
 357
 358 void Track::turnout_event(unsigned addr, unsigned state)
 359 {
 360         if(!turnout_id)
 361                 return;
 362
 363         if(addr==turnout_id)
 364         {
 365                 active_path = state;
 366                 path_changing = false;
 367                 signal_path_changed.emit(active_path);
 368         }
 369 }
 370
 371
 372 Track::Loader::Loader(Track &t):
 373         DataFile::ObjectLoader<Track>(t)
 374 {
 375         add("position",   &Loader::position);
 376         add("rotation",   &Loader::rotation);
 377         add("slope",      &Track::slope);
 378         add("turnout_id", &Loader::turnout_id);
 379         add("sensor_id",  &Loader::sensor_id);
 380         add("flex",       &Track::flex);
 381 }
 382
 383 void Track::Loader::position(float x, float y, float z)
 384 {
 385         obj.position = Vector(x, y, z);
 386 }
 387
 388 void Track::Loader::rotation(float r)
 389 {
 390         obj.rotation = r;
 391 }
 392
 393 void Track::Loader::sensor_id(unsigned id)
 394 {
 395         obj.set_sensor_id(id);
 396 }
 397
 398 void Track::Loader::turnout_id(unsigned id)
 399 {
 400         obj.set_turnout_id(id);
 401 }
 402
 403 } // namespace R2C2