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(*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(*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         for(vector<Track *>::const_iterator i=links.begin(); i!=links.end(); ++i)
  73                 if(*i)
  74                         (*i)->check_slope();
  75 }
  76
  77 void Track::set_rotation(const Angle &r)
  78 {
  79         rotation = wrap_positive(r);
  80 }
  81
  82 void Track::set_slope(float s)
  83 {
  84         if(links.size()!=2)
  85                 return;
  86
  87         slope = s;
  88 }
  89
  90 void Track::set_flex(bool f)
  91 {
  92         flex = f;
  93 }
  94
  95 void Track::check_slope()
  96 {
  97         if(links.size()!=2)
  98                 return;
  99
 100         if(links[0] && links[1])
 101         {
 102                 Vector epp0 = links[0]->get_snap_node(links[0]->get_link_slot(*this)).position;
 103                 Vector epp1 = links[1]->get_snap_node(links[1]->get_link_slot(*this)).position;
 104                 position.z = epp0.z;
 105                 slope = epp1.z-position.z;
 106         }
 107         else
 108         {
 109                 if(links[0])
 110                 {
 111                         Vector epp = links[0]->get_snap_node(links[0]->get_link_slot(*this)).position;
 112                         position.z = epp.z;
 113                 }
 114                 else if(links[1])
 115                 {
 116                         Vector epp = links[1]->get_snap_node(links[1]->get_link_slot(*this)).position;
 117                         position.z = epp.z-slope;
 118                 }
 119         }
 120 }
 121
 122 void Track::set_turnout_id(unsigned i)
 123 {
 124         if(!type.is_turnout())
 125                 throw logic_error("not a turnout");
 126         if(!i)
 127                 throw invalid_argument("Track::set_turnout_id");
 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         signal_path_changing(p);
 155         path_changing = true;
 156         layout.get_driver().set_turnout(turnout_id, p);
 157 }
 158
 159 TrackPoint Track::get_point(unsigned epi, unsigned path, float d) const
 160 {
 161         TrackPoint p = type.get_point(epi, path, d);
 162
 163         p.pos = position+rotated_vector(p.pos, rotation);
 164         p.dir += rotation;
 165         if(type.get_endpoints().size()==2)
 166         {
 167                 float len = type.get_path_length(path);
 168                 float grade = slope/len;
 169                 if(epi==0)
 170                 {
 171                         p.pos.z += grade*d;
 172                         p.grade = grade;
 173                 }
 174                 else
 175                 {
 176                         p.pos.z += slope-grade*d;
 177                         p.grade = -grade;
 178                 }
 179         }
 180
 181         return p;
 182 }
 183
 184 TrackPoint Track::get_point(unsigned epi, float d) const
 185 {
 186         return get_point(epi, active_path, d);
 187 }
 188
 189 unsigned Track::get_n_snap_nodes() const
 190 {
 191         return type.get_endpoints().size();
 192 }
 193
 194 Snap Track::get_snap_node(unsigned i) const
 195 {
 196         const vector<TrackType::Endpoint> &eps = type.get_endpoints();
 197         if(i>=eps.size())
 198                 throw out_of_range("Track::get_snap_node");
 199
 200         Snap result;
 201         const TrackType::Endpoint &ep = eps[i];
 202
 203         result.position = position+rotated_vector(ep.pos, rotation);
 204         if(eps.size()==2 && i==1)
 205                 result.position.z += slope;
 206
 207         result.rotation = rotation+ep.dir;
 208
 209         return result;
 210 }
 211
 212 bool Track::snap(Snap &sn, float limit, SnapType what) const
 213 {
 214         if(Object::snap(sn, limit, what))
 215                 return true;
 216
 217         if(what&SNAP_SEGMENT)
 218         {
 219                 Vector local = rotated_vector(sn.position-position, -rotation);
 220
 221                 TrackPoint tp = type.get_nearest_point(local);
 222                 Vector span = local-tp.pos;
 223                 if(dot(span, span)<=limit*limit)
 224                 {
 225                         sn.position = position+rotated_vector(tp.pos, rotation);
 226                         sn.rotation = tp.dir+rotation;
 227                         return true;
 228                 }
 229         }
 230
 231         return false;
 232 }
 233
 234 SnapType Track::get_default_snap_type_to(const Object &other) const
 235 {
 236         if(dynamic_cast<const Track *>(&other))
 237                 return SNAP_NODE;
 238
 239         return NO_SNAP;
 240 }
 241
 242 unsigned Track::get_n_link_slots() const
 243 {
 244         return links.size();
 245 }
 246
 247 Track *Track::get_link(unsigned i) const
 248 {
 249         if(i>=links.size())
 250                 throw out_of_range("Track::get_link");
 251
 252         return links[i];
 253 }
 254
 255 int Track::get_link_slot(const Object &other) const
 256 {
 257         for(unsigned i=0; i<links.size(); ++i)
 258                 if(links[i]==&other)
 259                         return i;
 260
 261         return -1;
 262 }
 263
 264 bool Track::link_to(Object &other)
 265 {
 266         Track *otrack = dynamic_cast<Track *>(&other);
 267         if(!otrack)
 268                 return false;
 269
 270         float limit = layout.get_catalogue().get_gauge();
 271         if(!flex && !otrack->get_flex())
 272                 limit /= 10;
 273         limit *= limit;
 274
 275         unsigned nsn = get_n_snap_nodes();
 276         unsigned other_nsn = other.get_n_snap_nodes();
 277         for(unsigned i=0; i<nsn; ++i)
 278         {
 279                 Snap sn = get_snap_node(i);
 280                 for(unsigned j=0; j<other_nsn; ++j)
 281                 {
 282                         Snap osn = other.get_snap_node(j);
 283                         Vector span = osn.position-sn.position;
 284                         Angle da = wrap_balanced(osn.rotation-sn.rotation-Angle::half_turn());
 285
 286                         if(dot(span, span)<limit && abs(da).radians()<0.01)
 287                         {
 288                                 break_link(i);
 289                                 links[i] = otrack;
 290                                 otrack->links[j] = this;
 291                                 check_slope();
 292                                 layout.create_blocks(*this);
 293
 294                                 signal_link_changed.emit(i, otrack);
 295                                 otrack->signal_link_changed.emit(j, this);
 296                                 return true;
 297                         }
 298                 }
 299         }
 300
 301         return false;
 302 }
 303
 304 bool Track::break_link(unsigned i)
 305 {
 306         if(i>=links.size())
 307                 throw out_of_range("Track::break_link");
 308
 309         Track *other = links[i];
 310         if(!other)
 311                 return false;
 312
 313         links[i] = 0;
 314         other->break_link(*this);
 315         // XXX Creates the blocks twice, because the other track calls this too
 316         layout.create_blocks(*this);
 317         signal_link_changed.emit(i, 0);
 318
 319         return true;
 320 }
 321
 322 void Track::save(list<DataFile::Statement> &st) const
 323 {
 324         st.push_back((DataFile::Statement("position"), position.x, position.y, position.z));
 325         st.push_back((DataFile::Statement("rotation"), rotation.radians()));
 326         st.push_back((DataFile::Statement("slope"), slope));
 327         if(turnout_id)
 328                 st.push_back((DataFile::Statement("turnout_id"), turnout_id));
 329         if(sensor_id)
 330                 st.push_back((DataFile::Statement("sensor_id"), sensor_id));
 331         if(flex)
 332                 st.push_back((DataFile::Statement("flex"), true));
 333 }
 334
 335 void Track::turnout_event(unsigned addr, unsigned state)
 336 {
 337         if(!turnout_id)
 338                 return;
 339
 340         if(addr==turnout_id)
 341         {
 342                 active_path = state;
 343                 path_changing = false;
 344                 signal_path_changed.emit(active_path);
 345         }
 346 }
 347
 348
 349 Track::Loader::Loader(Track &t):
 350         DataFile::ObjectLoader<Track>(t)
 351 {
 352         add("position",   &Loader::position);
 353         add("rotation",   &Loader::rotation);
 354         add("slope",      &Track::slope);
 355         add("turnout_id", &Loader::turnout_id);
 356         add("sensor_id",  &Loader::sensor_id);
 357         add("flex",       &Track::flex);
 358 }
 359
 360 void Track::Loader::position(float x, float y, float z)
 361 {
 362         obj.position = Vector(x, y, z);
 363 }
 364
 365 void Track::Loader::rotation(float r)
 366 {
 367         obj.rotation = Angle::from_radians(r);
 368 }
 369
 370 void Track::Loader::sensor_id(unsigned id)
 371 {
 372         obj.set_sensor_id(id);
 373 }
 374
 375 void Track::Loader::turnout_id(unsigned id)
 376 {
 377         obj.set_turnout_id(id);
 378 }
 379
 380 } // namespace R2C2