source/libmarklin/track.cpp

   1 /* $Id$
   2
   3 This file is part of the MSP Märklin suite
   4 Copyright © 2006-2010  Mikkosoft Productions, Mikko Rasa
   5 Distributed under the GPL
   6 */
   7
   8 #include <cmath>
   9 #include "driver.h"
  10 #include "layout.h"
  11 #include "track.h"
  12 #include "tracktype.h"
  13
  14 using namespace std;
  15 using namespace Msp;
  16
  17 namespace Marklin {
  18
  19 Track::Track(Layout &l, const TrackType &t):
  20         layout(l),
  21         type(t),
  22         rot(0),
  23         slope(0),
  24         flex(false),
  25         turnout_id(0),
  26         sensor_id(0),
  27         links(t.get_endpoints().size()),
  28         active_path(0)
  29 {
  30         layout.add_track(*this);
  31
  32         if(layout.has_driver())
  33                 layout.get_driver().signal_turnout.connect(sigc::mem_fun(this, &Track::turnout_event));
  34
  35         for(unsigned paths = type.get_paths(); !(paths&1); ++active_path, paths>>=1) ;
  36 }
  37
  38 Track::~Track()
  39 {
  40         break_links();
  41         layout.remove_track(*this);
  42 }
  43
  44 void Track::set_position(const Point &p)
  45 {
  46         pos = p;
  47 }
  48
  49 void Track::set_rotation(float r)
  50 {
  51         rot = r;
  52         while(rot<0)
  53                 rot += M_PI*2;
  54         while(rot>M_PI*2)
  55                 rot -= M_PI*2;
  56 }
  57
  58 void Track::set_slope(float s)
  59 {
  60         if(links.size()!=2)
  61                 return;
  62
  63         slope = s;
  64 }
  65
  66 void Track::set_flex(bool f)
  67 {
  68         flex = f;
  69 }
  70
  71 void Track::check_slope()
  72 {
  73         if(links.size()!=2)
  74                 return;
  75
  76         if(links[0] && links[1])
  77         {
  78                 Point epp0 = links[0]->get_endpoint_position(links[0]->get_endpoint_by_link(*this));
  79                 Point epp1 = links[1]->get_endpoint_position(links[1]->get_endpoint_by_link(*this));
  80                 pos.z = epp0.z;
  81                 slope = epp1.z-pos.z;
  82         }
  83         else
  84         {
  85                 slope = 0;
  86                 if(links[0])
  87                 {
  88                         Point epp = links[0]->get_endpoint_position(links[0]->get_endpoint_by_link(*this));
  89                         pos.z = epp.z;
  90                 }
  91                 else if(links[1])
  92                 {
  93                         Point epp = links[1]->get_endpoint_position(links[1]->get_endpoint_by_link(*this));
  94                         pos.z = epp.z;
  95                 }
  96         }
  97 }
  98
  99 void Track::set_turnout_id(unsigned i)
 100 {
 101         if(!type.is_turnout())
 102                 throw InvalidState("Not a turnout");
 103
 104         turnout_id = i;
 105         layout.create_blocks(*this);
 106         if(layout.has_driver() && turnout_id)
 107                 layout.get_driver().add_turnout(turnout_id);
 108 }
 109
 110 void Track::set_sensor_id(unsigned i)
 111 {
 112         if(type.is_turnout())
 113                 throw InvalidState("Can't set sensor on a turnout");
 114
 115         sensor_id = i;
 116         layout.create_blocks(*this);
 117         if(layout.has_driver() && sensor_id)
 118                 layout.get_driver().add_sensor(sensor_id);
 119 }
 120
 121 void Track::set_active_path(unsigned p)
 122 {
 123         if(!turnout_id)
 124                 throw InvalidState("Not a turnout");
 125         if(!(type.get_paths()&(1<<p)))
 126                 throw InvalidParameterValue("Invalid path");
 127
 128         layout.get_driver().set_turnout(turnout_id, p&1);
 129         if(type.get_n_paths()>2)
 130                 layout.get_driver().set_turnout(turnout_id+1, p&2);
 131 }
 132
 133 int Track::get_endpoint_by_link(const Track &other) const
 134 {
 135         for(unsigned i=0; i<links.size(); ++i)
 136                 if(links[i]==&other)
 137                         return i;
 138
 139         return -1;
 140 }
 141
 142 Point Track::get_endpoint_position(unsigned epi) const
 143 {
 144         const vector<Endpoint> &eps = type.get_endpoints();
 145         if(epi>=eps.size())
 146                 throw InvalidParameterValue("Endpoint index out of range");
 147
 148         const Endpoint &ep = eps[epi];
 149
 150         float c = cos(rot);
 151         float s = sin(rot);
 152
 153         Point p(pos.x+c*ep.pos.x-s*ep.pos.y, pos.y+s*ep.pos.x+c*ep.pos.y, pos.z);
 154         if(eps.size()==2 && epi==1)
 155                 p.z += slope;
 156         return p;
 157 }
 158
 159 float Track::get_endpoint_direction(unsigned epi) const
 160 {
 161         const vector<Endpoint> &eps = type.get_endpoints();
 162         if(epi>=eps.size())
 163                 throw InvalidParameterValue("Endpoint index out of range");
 164
 165         const Endpoint &ep = eps[epi];
 166
 167         return rot+ep.dir;
 168 }
 169
 170 bool Track::snap_to(Track &other, bool link)
 171 {
 172         float limit = (link && !flex) ? 1e-6 : 1e-4;
 173         const vector<Endpoint> &eps = type.get_endpoints();
 174         const vector<Endpoint> &other_eps = other.get_type().get_endpoints();
 175
 176         for(unsigned i=0; i<eps.size(); ++i)
 177         {
 178                 Point epp = get_endpoint_position(i);
 179
 180                 for(unsigned j=0; j<other_eps.size(); ++j)
 181                 {
 182                         if(other.get_link(j))
 183                                 continue;
 184
 185                         Point epp2 = other.get_endpoint_position(j);
 186                         float dx = epp2.x-epp.x;
 187                         float dy = epp2.y-epp.y;
 188                         if(dx*dx+dy*dy<limit)
 189                         {
 190                                 set_rotation(other.rot+other_eps[j].dir-eps[i].dir+M_PI);
 191                                 Point p(epp2.x-(eps[i].pos.x*cos(rot)-eps[i].pos.y*sin(rot)),
 192                                         epp2.y-(eps[i].pos.y*cos(rot)+eps[i].pos.x*sin(rot)),
 193                                         epp2.z);
 194                                 if(eps.size()==2 && i==1)
 195                                         p.z -= slope;
 196                                 set_position(p);
 197
 198                                 if(link)
 199                                 {
 200                                         if(links[i])
 201                                                 break_link(*links[i]);
 202                                         links[i] = &other;
 203                                         other.links[j] = this;
 204                                         layout.create_blocks(*this);
 205                                 }
 206
 207                                 return true;
 208                         }
 209                 }
 210         }
 211
 212         return false;
 213 }
 214
 215 bool Track::snap(Point &pt, float &d) const
 216 {
 217         const vector<Endpoint> &eps = type.get_endpoints();
 218
 219         for(unsigned i=0; i<eps.size(); ++i)
 220         {
 221                 Point epp = get_endpoint_position(i);
 222                 float dx = pt.x-epp.x;
 223                 float dy = pt.y-epp.y;
 224                 if(dx*dx+dy*dy<1e-4)
 225                 {
 226                         pt = epp;
 227                         d = rot+eps[i].dir;
 228                         return true;
 229                 }
 230         }
 231
 232         return false;
 233 }
 234
 235 void Track::break_link(Track &trk)
 236 {
 237         for(vector<Track *>::iterator i=links.begin(); i!=links.end(); ++i)
 238                 if(*i==&trk)
 239                 {
 240                         *i = 0;
 241                         trk.break_link(*this);
 242                         // XXX Creates the blocks twice
 243                         layout.create_blocks(*this);
 244                         return;
 245                 }
 246 }
 247
 248 void Track::break_links()
 249 {
 250         for(vector<Track *>::iterator i=links.begin(); i!=links.end(); ++i)
 251                 if(Track *trk=*i)
 252                 {
 253                         *i = 0;
 254                         trk->break_link(*this);
 255                 }
 256 }
 257
 258 Track *Track::get_link(unsigned i) const
 259 {
 260         if(i>links.size())
 261                 throw InvalidParameterValue("Link index out of range");
 262
 263         return links[i];
 264 }
 265
 266 unsigned Track::traverse(unsigned i, unsigned path) const
 267 {
 268         const vector<Endpoint> &eps = type.get_endpoints();
 269         if(i>=eps.size())
 270                 throw InvalidParameterValue("Endpoint index out of range");
 271
 272         const Endpoint &ep = eps[i];
 273
 274         if(ep.paths&(1<<path))
 275         {
 276                 // Find the other endpoint for this path
 277                 for(unsigned j=0; j<eps.size(); ++j)
 278                         if((eps[j].paths&(1<<path)) && j!=i)
 279                                 return j;
 280         }
 281         else
 282         {
 283                 // Find an endpoint that's connected to this one and has the requested path
 284                 for(unsigned j=0; j<eps.size(); ++j)
 285                         if((eps[j].paths&(1<<path)) && (eps[j].paths&ep.paths))
 286                                 return j;
 287         }
 288
 289         throw Exception("Track endpoint did not have a counterpart");
 290 }
 291
 292 TrackPoint Track::get_point(unsigned epi, unsigned path, float d) const
 293 {
 294         TrackPoint p = type.get_point(epi, path, d);
 295         float c = cos(rot);
 296         float s = sin(rot);
 297
 298         p.pos = Point(pos.x+c*p.pos.x-s*p.pos.y, pos.y+s*p.pos.x+c*p.pos.y, 0);
 299         if(type.get_endpoints().size()==2)
 300         {
 301                 float len = type.get_path_length(path);
 302                 float grade = slope/len;
 303                 if(epi==0)
 304                 {
 305                         p.pos.z = pos.z+grade*d;
 306                         p.grade = grade;
 307                 }
 308                 else
 309                 {
 310                         p.pos.z = pos.z+slope-grade*d;
 311                         p.grade = -grade;
 312                 }
 313         }
 314
 315         return p;
 316 }
 317
 318 void Track::save(list<DataFile::Statement> &st) const
 319 {
 320         st.push_back((DataFile::Statement("position"), pos.x, pos.y, pos.z));
 321         st.push_back((DataFile::Statement("rotation"), rot));
 322         st.push_back((DataFile::Statement("slope"), slope));
 323         if(turnout_id)
 324                 st.push_back((DataFile::Statement("turnout_id"), turnout_id));
 325         if(sensor_id)
 326                 st.push_back((DataFile::Statement("sensor_id"), sensor_id));
 327         if(flex)
 328                 st.push_back((DataFile::Statement("flex"), true));
 329 }
 330
 331 void Track::turnout_event(unsigned addr, bool state)
 332 {
 333         if(!turnout_id)
 334                 return;
 335
 336         if(addr==turnout_id)
 337                 active_path = (active_path&2) | (state ? 1 : 0);
 338         else if(type.is_double_address() && addr==turnout_id+1)
 339                 active_path = (active_path&1) | (state ? 2 : 0);
 340 }
 341
 342
 343 Track::Loader::Loader(Track &t):
 344         DataFile::BasicLoader<Track>(t)
 345 {
 346         add("position",   &Loader::position);
 347         add("rotation",   &Track::rot);
 348         add("slope",      &Track::slope);
 349         add("turnout_id", &Loader::turnout_id);
 350         add("sensor_id",  &Loader::sensor_id);
 351         add("flex",       &Track::flex);
 352 }
 353
 354 void Track::Loader::position(float x, float y, float z)
 355 {
 356         obj.pos = Point(x, y, z);
 357 }
 358
 359 void Track::Loader::sensor_id(unsigned id)
 360 {
 361         obj.set_sensor_id(id);
 362 }
 363
 364 void Track::Loader::turnout_id(unsigned id)
 365 {
 366         obj.set_turnout_id(id);
 367 }
 368
 369 } // namespace Marklin