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         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
 127         turnout_id = i;
 128         layout.create_blocks(*this);
 129         layout.update_routes();
 130         if(layout.has_driver() && turnout_id)
 131                 layout.get_driver().add_turnout(turnout_id, type);
 132 }
 133
 134 void Track::set_sensor_id(unsigned i)
 135 {
 136         if(type.is_turnout())
 137                 throw logic_error("is a turnout");
 138
 139         sensor_id = i;
 140         layout.create_blocks(*this);
 141         if(layout.has_driver() && sensor_id)
 142                 layout.get_driver().add_sensor(sensor_id);
 143 }
 144
 145 void Track::set_active_path(unsigned p)
 146 {
 147         if(!turnout_id)
 148                 throw logic_error("not a turnout");
 149         if(!(type.get_paths()&(1<<p)))
 150                 throw invalid_argument("Track::set_active_path");
 151
 152         path_changing = true;
 153         layout.get_driver().set_turnout(turnout_id, p);
 154 }
 155
 156 TrackPoint Track::get_point(unsigned epi, unsigned path, float d) const
 157 {
 158         TrackPoint p = type.get_point(epi, path, d);
 159
 160         p.pos = position+rotated_vector(p.pos, rotation);
 161         p.dir += rotation;
 162         if(type.get_endpoints().size()==2)
 163         {
 164                 float len = type.get_path_length(path);
 165                 float grade = slope/len;
 166                 if(epi==0)
 167                 {
 168                         p.pos.z += grade*d;
 169                         p.grade = grade;
 170                 }
 171                 else
 172                 {
 173                         p.pos.z += slope-grade*d;
 174                         p.grade = -grade;
 175                 }
 176         }
 177
 178         return p;
 179 }
 180
 181 TrackPoint Track::get_point(unsigned epi, float d) const
 182 {
 183         return get_point(epi, active_path, d);
 184 }
 185
 186 unsigned Track::get_n_snap_nodes() const
 187 {
 188         return type.get_endpoints().size();
 189 }
 190
 191 Snap Track::get_snap_node(unsigned i) const
 192 {
 193         const vector<TrackType::Endpoint> &eps = type.get_endpoints();
 194         if(i>=eps.size())
 195                 throw out_of_range("Track::get_snap_node");
 196
 197         Snap result;
 198         const TrackType::Endpoint &ep = eps[i];
 199
 200         result.position = position+rotated_vector(ep.pos, rotation);
 201         if(eps.size()==2 && i==1)
 202                 result.position.z += slope;
 203
 204         result.rotation = rotation+ep.dir;
 205
 206         return result;
 207 }
 208
 209 bool Track::snap(Snap &sn, float limit, SnapType what) const
 210 {
 211         if(Object::snap(sn, limit, what))
 212                 return true;
 213
 214         if(what&SNAP_SEGMENT)
 215         {
 216                 Vector local = rotated_vector(sn.position-position, -rotation);
 217
 218                 TrackPoint tp = type.get_nearest_point(local);
 219                 Vector span = local-tp.pos;
 220                 if(dot(span, span)<=limit*limit)
 221                 {
 222                         sn.position = position+rotated_vector(tp.pos, rotation);
 223                         sn.rotation = tp.dir+rotation;
 224                         return true;
 225                 }
 226         }
 227
 228         return false;
 229 }
 230
 231 SnapType Track::get_default_snap_type_to(const Object &other) const
 232 {
 233         if(dynamic_cast<const Track *>(&other))
 234                 return SNAP_NODE;
 235
 236         return NO_SNAP;
 237 }
 238
 239 unsigned Track::get_n_link_slots() const
 240 {
 241         return links.size();
 242 }
 243
 244 Track *Track::get_link(unsigned i) const
 245 {
 246         if(i>=links.size())
 247                 throw out_of_range("Track::get_link");
 248
 249         return links[i];
 250 }
 251
 252 int Track::get_link_slot(const Object &other) const
 253 {
 254         for(unsigned i=0; i<links.size(); ++i)
 255                 if(links[i]==&other)
 256                         return i;
 257
 258         return -1;
 259 }
 260
 261 bool Track::link_to(Object &other)
 262 {
 263         Track *otrack = dynamic_cast<Track *>(&other);
 264         if(!otrack)
 265                 return false;
 266
 267         float limit = layout.get_catalogue().get_gauge();
 268         if(!flex && !otrack->get_flex())
 269                 limit /= 10;
 270         limit *= limit;
 271
 272         unsigned nsn = get_n_snap_nodes();
 273         unsigned other_nsn = other.get_n_snap_nodes();
 274         for(unsigned i=0; i<nsn; ++i)
 275         {
 276                 Snap sn = get_snap_node(i);
 277                 for(unsigned j=0; j<other_nsn; ++j)
 278                 {
 279                         Snap osn = other.get_snap_node(j);
 280                         Vector span = osn.position-sn.position;
 281                         Angle da = wrap_balanced(osn.rotation-sn.rotation-Angle::half_turn());
 282
 283                         if(dot(span, span)<limit && abs(da).radians()<0.01)
 284                         {
 285                                 break_link(i);
 286                                 links[i] = otrack;
 287                                 otrack->links[j] = this;
 288                                 check_slope();
 289                                 layout.create_blocks(*this);
 290
 291                                 signal_link_changed.emit(i, otrack);
 292                                 otrack->signal_link_changed.emit(j, this);
 293                                 return true;
 294                         }
 295                 }
 296         }
 297
 298         return false;
 299 }
 300
 301 bool Track::break_link(unsigned i)
 302 {
 303         if(i>=links.size())
 304                 throw out_of_range("Track::break_link");
 305
 306         Track *other = links[i];
 307         if(!other)
 308                 return false;
 309
 310         links[i] = 0;
 311         other->break_link(*this);
 312         // XXX Creates the blocks twice, because the other track calls this too
 313         layout.create_blocks(*this);
 314         signal_link_changed.emit(i, 0);
 315
 316         return true;
 317 }
 318
 319 void Track::save(list<DataFile::Statement> &st) const
 320 {
 321         st.push_back((DataFile::Statement("position"), position.x, position.y, position.z));
 322         st.push_back((DataFile::Statement("rotation"), rotation.radians()));
 323         st.push_back((DataFile::Statement("slope"), slope));
 324         if(turnout_id)
 325                 st.push_back((DataFile::Statement("turnout_id"), turnout_id));
 326         if(sensor_id)
 327                 st.push_back((DataFile::Statement("sensor_id"), sensor_id));
 328         if(flex)
 329                 st.push_back((DataFile::Statement("flex"), true));
 330 }
 331
 332 void Track::turnout_event(unsigned addr, unsigned state)
 333 {
 334         if(!turnout_id)
 335                 return;
 336
 337         if(addr==turnout_id)
 338         {
 339                 active_path = state;
 340                 path_changing = false;
 341                 signal_path_changed.emit(active_path);
 342         }
 343 }
 344
 345
 346 Track::Loader::Loader(Track &t):
 347         DataFile::ObjectLoader<Track>(t)
 348 {
 349         add("position",   &Loader::position);
 350         add("rotation",   &Loader::rotation);
 351         add("slope",      &Track::slope);
 352         add("turnout_id", &Loader::turnout_id);
 353         add("sensor_id",  &Loader::sensor_id);
 354         add("flex",       &Track::flex);
 355 }
 356
 357 void Track::Loader::position(float x, float y, float z)
 358 {
 359         obj.position = Vector(x, y, z);
 360 }
 361
 362 void Track::Loader::rotation(float r)
 363 {
 364         obj.rotation = Angle::from_radians(r);
 365 }
 366
 367 void Track::Loader::sensor_id(unsigned id)
 368 {
 369         obj.set_sensor_id(id);
 370 }
 371
 372 void Track::Loader::turnout_id(unsigned id)
 373 {
 374         obj.set_turnout_id(id);
 375 }
 376
 377 } // namespace R2C2