source/libmarklin/train.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 <msp/strings/formatter.h>
  10 #include <msp/time/units.h>
  11 #include <msp/time/utils.h>
  12 #include "driver.h"
  13 #include "layout.h"
  14 #include "locotype.h"
  15 #include "route.h"
  16 #include "tracktype.h"
  17 #include "train.h"
  18 #include "vehicle.h"
  19
  20 using namespace std;
  21 using namespace Msp;
  22
  23 namespace Marklin {
  24
  25 Train::Train(Layout &l, const LocoType &t, unsigned a):
  26         layout(l),
  27         loco_type(t),
  28         address(a),
  29         pending_block(0),
  30         target_speed(0),
  31         current_speed(0),
  32         reverse(false),
  33         functions(0),
  34         route(0),
  35         next_route(0),
  36         end_of_route(false),
  37         status("Unplaced"),
  38         travel_dist(0),
  39         travel_speed(0),
  40         pure_speed(false),
  41         real_speed(15)
  42 {
  43         vehicles.push_back(new Vehicle(layout, loco_type));
  44
  45         layout.add_train(*this);
  46
  47         layout.get_driver().add_loco(address);
  48         layout.get_driver().signal_loco_speed.connect(sigc::mem_fun(this, &Train::loco_speed_event));
  49         layout.get_driver().signal_loco_function.connect(sigc::mem_fun(this, &Train::loco_func_event));
  50
  51         layout.signal_block_reserved.connect(sigc::mem_fun(this, &Train::block_reserved));
  52         layout.get_driver().signal_sensor.connect(sigc::mem_fun(this, &Train::sensor_event));
  53         layout.get_driver().signal_turnout.connect(sigc::mem_fun(this, &Train::turnout_event));
  54 }
  55
  56 Train::~Train()
  57 {
  58         for(vector<Vehicle *>::iterator i=vehicles.begin(); i!=vehicles.end(); ++i)
  59                 delete *i;
  60         layout.remove_train(*this);
  61 }
  62
  63 void Train::set_name(const string &n)
  64 {
  65         name = n;
  66
  67         signal_name_changed.emit(name);
  68 }
  69
  70 Vehicle &Train::get_vehicle(unsigned i)
  71 {
  72         if(i>=vehicles.size())
  73                 throw InvalidParameterValue("Vehicle index out of range");
  74         return *vehicles[i];
  75 }
  76
  77 const Vehicle &Train::get_vehicle(unsigned i) const
  78 {
  79         if(i>=vehicles.size())
  80                 throw InvalidParameterValue("Vehicle index out of range");
  81         return *vehicles[i];
  82 }
  83
  84 void Train::set_speed(unsigned speed)
  85 {
  86         if(speed==target_speed)
  87                 return;
  88         travel_speed = static_cast<int>(round(get_real_speed(speed)*87*3.6/5))*5;
  89
  90         target_speed = speed;
  91         if(!target_speed)
  92         {
  93                 pending_block = 0;
  94                 stop_timeout = Time::now()+(800+current_speed*150)*Time::msec;
  95         }
  96         else
  97                 reserve_more();
  98
  99         signal_target_speed_changed.emit(target_speed);
 100
 101         update_speed();
 102         pure_speed = false;
 103 }
 104
 105 void Train::set_reverse(bool rev)
 106 {
 107         if(rev==reverse)
 108                 return;
 109
 110         if(target_speed)
 111         {
 112                 set_speed(0);
 113                 return;
 114         }
 115         else if(stop_timeout)
 116                 return;
 117
 118         layout.get_driver().set_loco_reverse(address, rev);
 119
 120         release_blocks(rsv_blocks);
 121         reverse_blocks(cur_blocks);
 122 }
 123
 124 void Train::set_function(unsigned func, bool state)
 125 {
 126         if(!loco_type.get_functions().count(func))
 127                 throw InvalidParameterValue("Invalid function");
 128         if(func<5)
 129                 layout.get_driver().set_loco_function(address, func, state);
 130         else
 131                 layout.get_driver().set_loco_function(address+1, func-4, state);
 132 }
 133
 134 bool Train::get_function(unsigned func) const
 135 {
 136         return (functions>>func)&1;
 137 }
 138
 139 void Train::set_route(const Route *r)
 140 {
 141         if(!rsv_blocks.empty())
 142         {
 143                 for(list<BlockRef>::iterator i=rsv_blocks.begin(); i!=rsv_blocks.end(); ++i)
 144                         if(i->block->get_sensor_id())
 145                         {
 146                                 release_blocks(rsv_blocks, ++i, rsv_blocks.end());
 147                                 break;
 148                         }
 149         }
 150
 151         route = r;
 152         next_route = 0;
 153         end_of_route = false;
 154
 155         if(route)
 156         {
 157                 BlockRef &last = (rsv_blocks.empty() ? cur_blocks.back() : rsv_blocks.back());
 158                 BlockRef next = last.next();
 159                 const Block::Endpoint &ep = next.block->get_endpoints()[next.entry];
 160                 if(!route->get_tracks().count(ep.track))
 161                 {
 162                         next_route = route;
 163                         route = Route::find(*ep.track, ep.track_ep, *next_route);
 164                 }
 165         }
 166
 167         if(target_speed && reserve_more()<2)
 168                 update_speed();
 169
 170         signal_route_changed.emit(route);
 171 }
 172
 173 void Train::go_to(const Track &to)
 174 {
 175         for(list<BlockRef>::const_iterator i=cur_blocks.begin(); i!=cur_blocks.end(); ++i)
 176                 if(i->block->get_tracks().count(const_cast<Track *>(&to)))
 177                 {
 178                         set_speed(0);
 179                         set_route(0);
 180                         return;
 181                 }
 182
 183         BlockRef *last = 0;
 184         if(rsv_blocks.empty())
 185                 last = &cur_blocks.back();
 186         else
 187         {
 188                 for(list<BlockRef>::iterator i=rsv_blocks.begin(); (i!=rsv_blocks.end() && !last); ++i)
 189                         if(i->block->get_sensor_id())
 190                                 last = &*i;
 191         }
 192
 193         BlockRef next = last->next();
 194         const Block::Endpoint &ep = next.block->get_endpoints()[next.entry];
 195
 196         set_route(Route::find(*ep.track, ep.track_ep, to));
 197 }
 198
 199 void Train::place(Block &block, unsigned entry)
 200 {
 201         if(target_speed)
 202                 set_speed(0);
 203
 204         release_blocks(rsv_blocks);
 205         release_blocks(cur_blocks);
 206
 207         if(!block.reserve(this))
 208         {
 209                 set_status("Unplaced");
 210                 return;
 211         }
 212
 213         cur_blocks.push_back(BlockRef(&block, entry));
 214         if(reverse)
 215         {
 216                 unsigned exit = block.traverse(entry);
 217                 const Block::Endpoint &bep = block.get_endpoints()[exit];
 218                 Track *track = bep.track->get_link(bep.track_ep);
 219                 unsigned ep = track->get_endpoint_by_link(*bep.track);
 220                 vehicles.front()->place(track, ep, 0, Vehicle::FRONT_BUFFER);
 221         }
 222         else
 223         {
 224                 const Block::Endpoint &bep = block.get_endpoints()[entry];
 225                 vehicles.front()->place(bep.track, bep.track_ep, 0, Vehicle::BACK_BUFFER);
 226         }
 227
 228         set_status("Stopped");
 229 }
 230
 231 bool Train::free_block(Block &block)
 232 {
 233         unsigned nsens = 0;
 234         for(list<BlockRef>::iterator i=rsv_blocks.begin(); i!=rsv_blocks.end(); ++i)
 235         {
 236                 if(i->block==&block)
 237                 {
 238                         if(nsens<1)
 239                                 return false;
 240                         release_blocks(rsv_blocks, i, rsv_blocks.end());
 241                         update_speed();
 242                         return true;
 243                 }
 244                 else if(i->block->get_sensor_id())
 245                         ++nsens;
 246         }
 247
 248         return false;
 249 }
 250
 251 int Train::get_entry_to_block(Block &block) const
 252 {
 253         for(list<BlockRef>::const_iterator i=cur_blocks.begin(); i!=cur_blocks.end(); ++i)
 254                 if(i->block==&block)
 255                         return i->entry;
 256         for(list<BlockRef>::const_iterator i=rsv_blocks.begin(); i!=rsv_blocks.end(); ++i)
 257                 if(i->block==&block)
 258                         return i->entry;
 259         return -1;
 260 }
 261
 262 void Train::tick(const Time::TimeStamp &t, const Time::TimeDelta &dt)
 263 {
 264         if(stop_timeout && t>=stop_timeout)
 265         {
 266                 release_blocks(rsv_blocks);
 267                 end_of_route = false;
 268                 stop_timeout = Time::TimeStamp();
 269         }
 270
 271         if(current_speed)
 272         {
 273                 Track *track = vehicles[0]->get_track();
 274
 275                 bool ok = false;
 276                 for(list<BlockRef>::const_iterator i=cur_blocks.begin(); (!ok && i!=cur_blocks.end()); ++i)
 277                         ok = i->block->get_tracks().count(track);
 278
 279                 if(ok)
 280                 {
 281                         float d = get_real_speed(current_speed)*(dt/Time::sec);
 282                         vehicles[0]->advance(reverse ? -d : d);
 283                 }
 284         }
 285 }
 286
 287 void Train::save(list<DataFile::Statement> &st) const
 288 {
 289         st.push_back((DataFile::Statement("name"), name));
 290         for(unsigned i=0; i<=14; ++i)
 291                 if(real_speed[i].weight)
 292                         st.push_back((DataFile::Statement("real_speed"), i, real_speed[i].speed, real_speed[i].weight));
 293
 294         if(!cur_blocks.empty())
 295         {
 296                 list<BlockRef> blocks = cur_blocks;
 297                 if(reverse)
 298                         reverse_blocks(blocks);
 299
 300                 Block *prev = blocks.front().block->get_endpoints()[blocks.front().entry].link;
 301                 st.push_back((DataFile::Statement("block_hint"), prev->get_id()));
 302
 303                 for(list<BlockRef>::const_iterator i=blocks.begin(); i!=blocks.end(); ++i)
 304                         st.push_back((DataFile::Statement("block"), i->block->get_id()));
 305         }
 306
 307         if(route)
 308                 st.push_back((DataFile::Statement("route"), route->get_name()));
 309 }
 310
 311 void Train::loco_speed_event(unsigned addr, unsigned speed, bool rev)
 312 {
 313         if(addr==address)
 314         {
 315                 current_speed = speed;
 316                 reverse = rev;
 317
 318                 signal_speed_changed.emit(current_speed);
 319                 signal_reverse_changed.emit(reverse);
 320         }
 321 }
 322
 323 void Train::loco_func_event(unsigned addr, unsigned func, bool state)
 324 {
 325         if(addr==address || (addr==address+1 && loco_type.get_max_function()>4))
 326         {
 327                 if(addr==address+1)
 328                         func += 4;
 329                 if(state)
 330                         functions |= 1<<func;
 331                 else
 332                         functions &= ~(1<<func);
 333
 334                 signal_function_changed.emit(func, state);
 335         }
 336 }
 337
 338 void Train::sensor_event(unsigned addr, bool state)
 339 {
 340         if(state)
 341         {
 342                 // Find the first sensor block from our reserved blocks that isn't this sensor
 343                 list<BlockRef>::iterator i;
 344                 for(i=rsv_blocks.begin(); i!=rsv_blocks.end(); ++i)
 345                         if(i->block->get_sensor_id() && i->block->get_sensor_id()!=addr)
 346                                 break;
 347
 348                 if(i!=rsv_blocks.begin())
 349                 {
 350                         // Compute speed and update related state
 351                         float travel_time_secs = (Time::now()-last_entry_time)/Time::sec;
 352                         travel_speed = static_cast<int>(round(travel_dist/travel_time_secs*87*3.6/5))*5;
 353
 354                         if(pure_speed)
 355                         {
 356                                 RealSpeed &rs = real_speed[current_speed];
 357                                 rs.add(travel_dist/travel_time_secs, travel_time_secs);
 358                         }
 359
 360                         travel_dist = 0;
 361                         float block_len;
 362                         for(list<BlockRef>::iterator j=rsv_blocks.begin(); j!=i; ++j)
 363                         {
 364                                 j->block->traverse(j->entry, &block_len);
 365                                 travel_dist += block_len;
 366
 367                                 if(j->block->get_sensor_id()==addr)
 368                                 {
 369                                         const Block::Endpoint &bep = j->block->get_endpoints()[j->entry];
 370                                         if(reverse)
 371                                         {
 372                                                 Track *track = bep.track->get_link(bep.track_ep);
 373                                                 unsigned ep = track->get_endpoint_by_link(*bep.track);
 374                                                 vehicles.back()->place(track, ep, 0, Vehicle::BACK_AXLE);
 375                                         }
 376                                         else
 377                                                 vehicles.front()->place(bep.track, bep.track_ep, 0, Vehicle::FRONT_AXLE);
 378                                 }
 379                         }
 380                         last_entry_time = Time::now();
 381                         pure_speed = true;
 382
 383                         // Check if we've reached the next route
 384                         if(next_route)
 385                         {
 386                                 const set<const Track *> &rtracks = next_route->get_tracks();
 387                                 for(list<BlockRef>::iterator j=rsv_blocks.begin(); j!=i; ++j)
 388                                         if(rtracks.count(j->block->get_endpoints()[j->entry].track))
 389                                         {
 390                                                 route = next_route;
 391                                                 next_route = 0;
 392                                                 // XXX Exceptions?
 393                                                 signal_route_changed.emit(route);
 394                                                 break;
 395                                         }
 396                         }
 397
 398                         // Move blocks up to the next sensor to our current blocks
 399                         cur_blocks.splice(cur_blocks.end(), rsv_blocks, rsv_blocks.begin(), i);
 400
 401                         // Try to get more blocks if we're moving
 402                         if(target_speed)
 403                         {
 404                                 unsigned nsens = reserve_more();
 405                                 if(!nsens && end_of_route)
 406                                 {
 407                                         set_speed(0);
 408                                         set_route(0);
 409                                 }
 410                                 else if(nsens<2)
 411                                         update_speed();
 412                         }
 413                 }
 414         }
 415         else
 416         {
 417                 // Find the first sensor in our current blocks that's still active
 418                 list<BlockRef>::iterator end = cur_blocks.begin();
 419                 for(list<BlockRef>::iterator i=cur_blocks.begin(); i!=cur_blocks.end(); ++i)
 420                         if(i->block->get_sensor_id())
 421                         {
 422                                 if(layout.get_driver().get_sensor(i->block->get_sensor_id()))
 423                                         break;
 424                                 else
 425                                         end = i;
 426                         }
 427
 428                 if(end!=cur_blocks.begin())
 429                 {
 430                         // Free blocks up to the last inactive sensor
 431                         ++end;
 432                         release_blocks(cur_blocks, cur_blocks.begin(), end);
 433                 }
 434         }
 435 }
 436
 437 void Train::turnout_event(unsigned addr, bool)
 438 {
 439         if(pending_block)
 440         {
 441                 unsigned pending_addr = pending_block->get_turnout_id();
 442                 bool double_addr = (*pending_block->get_tracks().begin())->get_type().is_double_address();
 443                 if(addr==pending_addr || (double_addr && addr==pending_addr+1))
 444                         reserve_more();
 445         }
 446 }
 447
 448 void Train::block_reserved(const Block &block, const Train *train)
 449 {
 450         if(&block==pending_block && !train)
 451                 reserve_more();
 452 }
 453
 454 unsigned Train::reserve_more()
 455 {
 456         BlockRef *last = 0;
 457         if(!rsv_blocks.empty())
 458                 last = &rsv_blocks.back();
 459         else if(!cur_blocks.empty())
 460                 last = &cur_blocks.back();
 461         if(!last)
 462                 return 0;
 463
 464         pending_block = 0;
 465
 466         // See how many sensor blocks we already have
 467         unsigned nsens = 0;
 468         for(list<BlockRef>::const_iterator i=rsv_blocks.begin(); i!=rsv_blocks.end(); ++i)
 469                 if(i->block->get_sensor_id())
 470                         ++nsens;
 471
 472         const Route *cur_route = 0;
 473         if(route)
 474         {
 475                 unsigned exit = last->block->traverse(last->entry);
 476                 Track *track = last->block->get_endpoints()[exit].track;
 477                 if(route->get_tracks().count(track))
 478                         cur_route = route;
 479                 else if(next_route && next_route->get_tracks().count(track))
 480                         cur_route = next_route;
 481         }
 482
 483         bool got_more = false;
 484         BlockRef *good = last;
 485         unsigned good_sens = nsens;
 486         while(good_sens<3)
 487         {
 488                 // Traverse to the next block
 489                 unsigned exit = last->block->traverse(last->entry);
 490                 Block *link = last->block->get_link(exit);
 491                 if(!link)
 492                         break;
 493
 494                 int entry = link->get_endpoint_by_link(*last->block);
 495                 if(entry<0)
 496                         throw LogicError("Block links are inconsistent!");
 497
 498                 const Block::Endpoint &entry_ep = link->get_endpoints()[entry];
 499
 500                 if(cur_route)
 501                 {
 502                         if(cur_route!=next_route && next_route && next_route->get_tracks().count(entry_ep.track))
 503                                 cur_route = next_route;
 504                         else if(!cur_route->get_tracks().count(entry_ep.track))
 505                         {
 506                                 // Keep the blocks if we arrived at the end of the route
 507                                 good = last;
 508                                 good_sens = nsens;
 509                                 end_of_route = true;
 510                                 break;
 511                         }
 512                 }
 513                 else if(route && route->get_tracks().count(entry_ep.track))
 514                         cur_route = route;
 515
 516                 if(!link->reserve(this))
 517                 {
 518                         // If we found another train and it's not headed straight for us, we can keep the blocks we got
 519                         int other_entry = link->get_train()->get_entry_to_block(*link);
 520                         if(other_entry<0)
 521                                 throw LogicError("Block reservation inconsistency");
 522                         if(static_cast<unsigned>(entry)!=link->traverse(other_entry))
 523                         {
 524                                 good = last;
 525                                 good_sens = nsens;
 526                         }
 527                         pending_block = link;
 528                         break;
 529                 }
 530
 531                 if(link->get_turnout_id())
 532                 {
 533                         const Endpoint &track_ep = entry_ep.track->get_type().get_endpoints()[entry_ep.track_ep];
 534
 535                         // Keep the blocks reserved so far, as either us or the other train can diverge
 536                         good = last;
 537                         good_sens = nsens;
 538
 539                         // Figure out what path we'd like to take on the turnout
 540                         int path = -1;
 541                         if(cur_route)
 542                                 path = cur_route->get_turnout(link->get_turnout_id());
 543                         if(path<0)
 544                                 path = entry_ep.track->get_active_path();
 545                         if(!((track_ep.paths>>path)&1))
 546                         {
 547                                 for(unsigned i=0; track_ep.paths>>i; ++i)
 548                                         if((track_ep.paths>>i)&1)
 549                                                 path = i;
 550                         }
 551
 552                         if(path!=static_cast<int>(entry_ep.track->get_active_path()))
 553                         {
 554                                 // The turnout is set to wrong path - switch and wait for it
 555                                 link->reserve(0);
 556                                 pending_block = link;
 557                                 entry_ep.track->set_active_path(path);
 558                                 break;
 559                         }
 560                 }
 561
 562                 rsv_blocks.push_back(BlockRef(link, entry));
 563                 last = &rsv_blocks.back();
 564                 if(last->block->get_sensor_id())
 565                 {
 566                         ++nsens;
 567                         got_more = true;
 568                 }
 569         }
 570
 571         // Unreserve blocks that were not good
 572         while(!rsv_blocks.empty() && last!=good)
 573         {
 574                 last->block->reserve(0);
 575                 rsv_blocks.erase(--rsv_blocks.end());
 576                 if(!rsv_blocks.empty())
 577                         last = &rsv_blocks.back();
 578         }
 579
 580         if(got_more)
 581                 update_speed();
 582
 583         return good_sens;
 584 }
 585
 586 void Train::update_speed()
 587 {
 588         Driver &driver = layout.get_driver();
 589
 590         unsigned speed;
 591         if(!target_speed)
 592         {
 593                 speed = 0;
 594                 set_status("Stopped");
 595         }
 596         else
 597         {
 598                 unsigned nsens = 0;
 599                 for(list<BlockRef>::const_iterator i=rsv_blocks.begin(); i!=rsv_blocks.end(); ++i)
 600                         if(i->block->get_sensor_id())
 601                                 ++nsens;
 602
 603                 unsigned slow_speed = find_speed(0.1);  // 31.3 km/h
 604                 if(nsens==0)
 605                 {
 606                         speed = 0;
 607                         pure_speed = false;
 608                         set_status("Blocked");
 609                 }
 610                 else if(nsens==1 && target_speed>slow_speed)
 611                 {
 612                         speed = slow_speed;
 613                         pure_speed = false;
 614                         set_status("Slow");
 615                 }
 616                 else
 617                 {
 618                         speed = target_speed;
 619                         set_status(format("Traveling %d kmh", travel_speed));
 620                 }
 621         }
 622
 623         driver.set_loco_speed(address, speed);
 624 }
 625
 626 float Train::get_real_speed(unsigned i) const
 627 {
 628         if(real_speed[i].weight)
 629                 return real_speed[i].speed;
 630
 631         unsigned low;
 632         unsigned high;
 633         for(low=i; low>0; --low)
 634                 if(real_speed[low].weight)
 635                         break;
 636         for(high=i; high<14; ++high)
 637                 if(real_speed[high].weight)
 638                         break;
 639
 640         if(real_speed[high].weight)
 641         {
 642                 if(real_speed[low].weight)
 643                 {
 644                         float f = float(i-low)/(high-low);
 645                         return real_speed[low].speed*(1-f)+real_speed[high].speed*f;
 646                 }
 647                 else
 648                         return real_speed[high].speed*float(i)/high;
 649         }
 650         else if(real_speed[low].weight)
 651                 return real_speed[low].speed*float(i)/low;
 652         else
 653                 return 0;
 654 }
 655
 656 unsigned Train::find_speed(float real) const
 657 {
 658         if(real<=real_speed[0].speed)
 659                 return 0;
 660
 661         unsigned low = 0;
 662         unsigned high = 0;
 663         for(unsigned i=0; (!high && i<=14); ++i)
 664                 if(real_speed[i].weight)
 665                 {
 666                         if(real_speed[i].speed<real)
 667                                 low = i;
 668                         else
 669                                 high = i;
 670                 }
 671         if(!high)
 672         {
 673                 if(!low)
 674                         return 0;
 675                 return min(static_cast<unsigned>(low*real/real_speed[low].speed), 14U);
 676         }
 677
 678         float f = (real-real_speed[low].speed)/(real_speed[high].speed-real_speed[low].speed);
 679         return static_cast<unsigned>(low*(1-f)+high*f+0.5);
 680 }
 681
 682 void Train::set_status(const string &s)
 683 {
 684         status = s;
 685         signal_status_changed.emit(s);
 686 }
 687
 688 void Train::release_blocks(list<BlockRef> &blocks)
 689 {
 690         release_blocks(blocks, blocks.begin(), blocks.end());
 691 }
 692
 693 void Train::release_blocks(list<BlockRef> &blocks, list<BlockRef>::iterator begin, list<BlockRef>::iterator end)
 694 {
 695         while(begin!=end)
 696         {
 697                 Block *block = begin->block;
 698                 blocks.erase(begin++);
 699                 block->reserve(0);
 700         }
 701 }
 702
 703 void Train::reverse_blocks(list<BlockRef> &blocks) const
 704 {
 705         blocks.reverse();
 706         for(list<BlockRef>::iterator i=blocks.begin(); i!=blocks.end(); ++i)
 707                 i->entry = i->block->traverse(i->entry);
 708 }
 709
 710
 711 Train::BlockRef::BlockRef(Block *b, unsigned e):
 712         block(b),
 713         entry(e)
 714 { }
 715
 716 Train::BlockRef Train::BlockRef::next() const
 717 {
 718         Block *blk = block->get_endpoints()[block->traverse(entry)].link;
 719         if(!blk)
 720                 throw InvalidState("At end of line");
 721
 722         int ep = blk->get_endpoint_by_link(*block);
 723         if(ep<0)
 724                 throw LogicError("Block links are inconsistent");
 725
 726         return BlockRef(blk, ep);
 727 }
 728
 729
 730 Train::RealSpeed::RealSpeed():
 731         speed(0),
 732         weight(0)
 733 { }
 734
 735 void Train::RealSpeed::add(float s, float w)
 736 {
 737         speed = (speed*weight+s*w)/(weight+w);
 738         weight = min(weight+w, 300.0f);
 739 }
 740
 741
 742 Train::Loader::Loader(Train &t):
 743         DataFile::BasicLoader<Train>(t),
 744         prev_block(0)
 745 {
 746         add("block",       &Loader::block);
 747         add("block_hint",  &Loader::block_hint);
 748         add("name",        &Loader::name);
 749         add("real_speed",  &Loader::real_speed);
 750         add("route",       &Loader::route);
 751 }
 752
 753 void Train::Loader::block(unsigned id)
 754 {
 755         Block &blk = obj.layout.get_block(id);
 756         int entry = -1;
 757         if(prev_block)
 758                 entry = blk.get_endpoint_by_link(*prev_block);
 759         if(entry<0)
 760                 entry = 0;
 761
 762         blk.reserve(&obj);
 763         obj.cur_blocks.push_back(BlockRef(&blk, entry));
 764         obj.set_status("Stopped");
 765         const Block::Endpoint &bep = blk.get_endpoints()[entry];
 766         obj.vehicles.back()->place(bep.track, bep.track_ep, 0, Vehicle::BACK_BUFFER);
 767
 768         if(blk.get_sensor_id())
 769                 obj.layout.get_driver().set_sensor(blk.get_sensor_id(), true);
 770
 771         prev_block = &blk;
 772 }
 773
 774 void Train::Loader::block_hint(unsigned id)
 775 {
 776         prev_block = &obj.layout.get_block(id);
 777 }
 778
 779 void Train::Loader::name(const string &n)
 780 {
 781         obj.set_name(n);
 782 }
 783
 784 void Train::Loader::real_speed(unsigned i, float speed, float weight)
 785 {
 786         obj.real_speed[i].speed = speed;
 787         obj.real_speed[i].weight = weight;
 788 }
 789
 790 void Train::Loader::route(const string &n)
 791 {
 792         obj.set_route(&obj.layout.get_route(n));
 793 }
 794
 795 } // namespace Marklin