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         propagate_slope();
  73 }
  74
  75 void Track::set_rotation(const Angle &r)
  76 {
  77         rotation = wrap_positive(r);
  78 }
  79
  80 void Track::set_tilt(const Angle &t)
  81 {
  82         if(links.size()!=2)
  83                 return;
  84
  85         tilt = t;
  86         slope = tan(tilt)*type.get_path_length(0);
  87         propagate_slope();
  88 }
  89
  90 void Track::set_flex(bool f)
  91 {
  92         flex = f;
  93 }
  94
  95 void Track::propagate_slope()
  96 {
  97         for(vector<Track *>::const_iterator i=links.begin(); i!=links.end(); ++i)
  98                 if(*i)
  99                         (*i)->check_slope();
 100 }
 101
 102 void Track::check_slope()
 103 {
 104         if(links.size()!=2)
 105                 return;
 106
 107         if(links[0] && links[1])
 108         {
 109                 Vector epp0 = links[0]->get_snap_node(links[0]->get_link_slot(*this)).position;
 110                 Vector epp1 = links[1]->get_snap_node(links[1]->get_link_slot(*this)).position;
 111                 position.z = epp0.z;
 112                 slope = epp1.z-position.z;
 113                 tilt = Geometry::atan(slope/type.get_path_length(0));
 114         }
 115         else
 116         {
 117                 if(links[0])
 118                 {
 119                         Vector epp = links[0]->get_snap_node(links[0]->get_link_slot(*this)).position;
 120                         position.z = epp.z;
 121                 }
 122                 else if(links[1])
 123                 {
 124                         Vector epp = links[1]->get_snap_node(links[1]->get_link_slot(*this)).position;
 125                         position.z = epp.z-slope;
 126                 }
 127         }
 128 }
 129
 130 void Track::set_turnout_id(unsigned i)
 131 {
 132         if(!type.is_turnout())
 133                 throw logic_error("not a turnout");
 134         if(!i)
 135                 throw invalid_argument("Track::set_turnout_id");
 136
 137         turnout_id = i;
 138         layout.create_blocks(*this);
 139         layout.update_routes();
 140         if(layout.has_driver() && turnout_id)
 141                 layout.get_driver().add_turnout(turnout_id, type);
 142 }
 143
 144 void Track::set_sensor_id(unsigned i)
 145 {
 146         if(type.is_turnout())
 147                 throw logic_error("is a turnout");
 148
 149         sensor_id = i;
 150         layout.create_blocks(*this);
 151         if(layout.has_driver() && sensor_id)
 152                 layout.get_driver().add_sensor(sensor_id);
 153 }
 154
 155 void Track::set_active_path(unsigned p)
 156 {
 157         if(!turnout_id)
 158                 throw logic_error("not a turnout");
 159         if(!(type.get_paths()&(1<<p)))
 160                 throw invalid_argument("Track::set_active_path");
 161
 162         signal_path_changing(p);
 163         path_changing = true;
 164         layout.get_driver().set_turnout(turnout_id, p);
 165 }
 166
 167 TrackPoint Track::get_point(unsigned epi, unsigned path, float d) const
 168 {
 169         TrackPoint p = type.get_point(epi, path, d);
 170
 171         p.pos = position+rotated_vector(p.pos, rotation);
 172         p.dir += rotation;
 173         if(type.get_endpoints().size()==2)
 174         {
 175                 float grade = tan(tilt);
 176                 if(epi==0)
 177                 {
 178                         p.pos.z += grade*d;
 179                         p.grade = grade;
 180                 }
 181                 else
 182                 {
 183                         p.pos.z += slope-grade*d;
 184                         p.grade = -grade;
 185                 }
 186         }
 187
 188         return p;
 189 }
 190
 191 TrackPoint Track::get_point(unsigned epi, float d) const
 192 {
 193         return get_point(epi, active_path, d);
 194 }
 195
 196 unsigned Track::get_n_snap_nodes() const
 197 {
 198         return type.get_endpoints().size();
 199 }
 200
 201 Snap Track::get_snap_node(unsigned i) const
 202 {
 203         const vector<TrackType::Endpoint> &eps = type.get_endpoints();
 204         if(i>=eps.size())
 205                 throw out_of_range("Track::get_snap_node");
 206
 207         Snap result;
 208         const TrackType::Endpoint &ep = eps[i];
 209
 210         result.position = position+rotated_vector(ep.pos, rotation);
 211         if(eps.size()==2 && i==1)
 212                 result.position.z += slope;
 213
 214         result.rotation = rotation+ep.dir;
 215
 216         return result;
 217 }
 218
 219 bool Track::snap(Snap &sn, float limit, SnapType what) const
 220 {
 221         if(Object::snap(sn, limit, what))
 222                 return true;
 223
 224         if(what&SNAP_SEGMENT)
 225         {
 226                 Vector local = rotated_vector(sn.position-position, -rotation);
 227
 228                 TrackPoint tp = type.get_nearest_point(local);
 229                 Vector span = local-tp.pos;
 230                 if(dot(span, span)<=limit*limit)
 231                 {
 232                         sn.position = position+rotated_vector(tp.pos, rotation);
 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 span = osn.position-sn.position;
 291                         Angle da = wrap_balanced(osn.rotation-sn.rotation-Angle::half_turn());
 292
 293                         if(dot(span, span)<limit && abs(da).radians()<0.01)
 294                         {
 295                                 break_link(i);
 296                                 links[i] = otrack;
 297                                 otrack->links[j] = this;
 298                                 check_slope();
 299                                 layout.create_blocks(*this);
 300
 301                                 signal_link_changed.emit(i, otrack);
 302                                 otrack->signal_link_changed.emit(j, this);
 303                                 return true;
 304                         }
 305                 }
 306         }
 307
 308         return false;
 309 }
 310
 311 bool Track::break_link(unsigned i)
 312 {
 313         if(i>=links.size())
 314                 throw out_of_range("Track::break_link");
 315
 316         Track *other = links[i];
 317         if(!other)
 318                 return false;
 319
 320         links[i] = 0;
 321         other->break_link(*this);
 322         // XXX Creates the blocks twice, because the other track calls this too
 323         layout.create_blocks(*this);
 324         signal_link_changed.emit(i, 0);
 325
 326         return true;
 327 }
 328
 329 void Track::save(list<DataFile::Statement> &st) const
 330 {
 331         st.push_back((DataFile::Statement("position"), position.x, position.y, position.z));
 332         st.push_back((DataFile::Statement("rotation"), rotation.radians()));
 333         st.push_back((DataFile::Statement("tilt"), tilt.radians()));
 334         if(turnout_id)
 335                 st.push_back((DataFile::Statement("turnout_id"), turnout_id));
 336         if(sensor_id)
 337                 st.push_back((DataFile::Statement("sensor_id"), sensor_id));
 338         if(flex)
 339                 st.push_back((DataFile::Statement("flex"), true));
 340 }
 341
 342 void Track::turnout_event(unsigned addr, unsigned state)
 343 {
 344         if(!turnout_id)
 345                 return;
 346
 347         if(addr==turnout_id)
 348         {
 349                 active_path = state;
 350                 path_changing = false;
 351                 signal_path_changed.emit(active_path);
 352         }
 353 }
 354
 355
 356 Track::Loader::Loader(Track &t):
 357         DataFile::ObjectLoader<Track>(t)
 358 {
 359         add("position",   &Loader::position);
 360         add("rotation",   &Loader::rotation);
 361         add("tilt",       &Loader::tilt);
 362         add("turnout_id", &Loader::turnout_id);
 363         add("sensor_id",  &Loader::sensor_id);
 364         add("flex",       &Track::flex);
 365
 366         // deprecated
 367         add("slope",      &Loader::slope);
 368 }
 369
 370 void Track::Loader::position(float x, float y, float z)
 371 {
 372         obj.position = Vector(x, y, z);
 373 }
 374
 375 void Track::Loader::rotation(float r)
 376 {
 377         obj.rotation = Angle::from_radians(r);
 378 }
 379
 380 void Track::Loader::sensor_id(unsigned id)
 381 {
 382         obj.set_sensor_id(id);
 383 }
 384
 385 void Track::Loader::slope(float s)
 386 {
 387         tilt(atan(s/obj.type.get_path_length(0)));
 388 }
 389
 390 void Track::Loader::tilt(float t)
 391 {
 392         if(obj.links.size()!=2)
 393                 return;
 394
 395         obj.tilt = Angle::from_radians(t);
 396         obj.slope = tan(t)*obj.type.get_path_length(0);
 397 }
 398
 399 void Track::Loader::turnout_id(unsigned id)
 400 {
 401         obj.set_turnout_id(id);
 402 }
 403
 404 } // namespace R2C2