source/libr2c2/signal.cpp

   1 #include "blockiter.h"
   2 #include "driver.h"
   3 #include "layout.h"
   4 #include "signal.h"
   5 #include "signaltype.h"
   6 #include "trackiter.h"
   7 #include "tracktype.h"
   8 #include "train.h"
   9
  10 using namespace std;
  11 using namespace Msp;
  12
  13 namespace R2C2 {
  14
  15 Signal::Signal(Layout &l, const SignalType &t):
  16         Object(l),
  17         type(t),
  18         address(0),
  19         track(0),
  20         block(0),
  21         entry(0),
  22         train(0),
  23         check_allocated_blocks(false),
  24         passing(false)
  25 {
  26         layout.add_signal(*this);
  27
  28         layout.signal_block_reserved.connect(sigc::mem_fun(this, &Signal::block_reserved));
  29 }
  30
  31 Signal::~Signal()
  32 {
  33         layout.remove_signal(*this);
  34 }
  35
  36 Signal *Signal::clone(Layout *to_layout) const
  37 {
  38         Signal *sig = new Signal((to_layout ? *to_layout : layout), type);
  39         sig->set_position(position);
  40         sig->set_rotation(rotation);
  41         return sig;
  42 }
  43
  44 void Signal::set_address(unsigned a)
  45 {
  46         address = a;
  47
  48         if(layout.has_driver() && address)
  49                 layout.get_driver().add_signal(address, type);
  50 }
  51
  52 void Signal::set_position(const Vector &p)
  53 {
  54         const set<Track *> &tracks = layout.get_tracks();
  55         float dist = -1;
  56         for(set<Track *>::const_iterator i=tracks.begin(); i!=tracks.end(); ++i)
  57                 if(!(*i)->get_type().is_turnout())
  58                 {
  59                         Snap sn;
  60                         sn.position = p;
  61                         sn.rotation = rotation;
  62                         (*i)->snap(sn, 1000, SNAP_SEGMENT);
  63                         float d = distance(p, sn.position);
  64                         if(d<dist || dist<0)
  65                         {
  66                                 position = sn.position;
  67                                 rotation = sn.rotation;
  68                                 track = *i;
  69                                 dist = d;
  70                         }
  71                 }
  72
  73         normalize_location();
  74 }
  75
  76 void Signal::normalize_location()
  77 {
  78         block = &track->get_block();
  79
  80         unsigned n_endpoints = track->get_type().get_endpoints().size();
  81         for(unsigned j=0; j<n_endpoints; ++j)
  82         {
  83                 float a = track->get_snap_node(j).rotation-rotation;
  84                 while(a<-M_PI/2)
  85                         a += M_PI*2;
  86                 while(a>M_PI*3/2)
  87                         a -= M_PI*2;
  88                 if(a>=M_PI/2)
  89                 {
  90                         BlockIter biter = TrackIter(track, j).block_iter();
  91                         entry = biter.entry();
  92                 }
  93         }
  94 }
  95
  96 void Signal::set_rotation(float r)
  97 {
  98         float a = rotation-r;
  99         while(a>M_PI*3/2)
 100                 a -= M_PI*2;
 101         while(a<-M_PI/2)
 102                 a += M_PI*2;
 103         if(a>=M_PI/2)
 104         {
 105                 rotation += M_PI;
 106                 if(rotation>M_PI*2)
 107                         rotation -= M_PI*2;
 108         }
 109
 110         normalize_location();
 111 }
 112
 113 unsigned Signal::get_n_snap_nodes() const
 114 {
 115         return 1;
 116 }
 117
 118 Snap Signal::get_snap_node(unsigned i) const
 119 {
 120         if(i>=1)
 121                 throw out_of_range("Signal::get_snap_node");
 122
 123         Snap sn;
 124         sn.position = position;
 125         sn.rotation = rotation;
 126         return sn;
 127 }
 128
 129 SnapType Signal::get_default_snap_type_to(const Object &other) const
 130 {
 131         if(dynamic_cast<const Track *>(&other))
 132                 return SNAP_SEGMENT;
 133
 134         return NO_SNAP;
 135 }
 136
 137 bool Signal::collide_ray(const Vector &start, const Vector &ray) const
 138 {
 139         // XXX Totally hardcoded stuff, should be replaced with a geometry system
 140         Vector center = position;
 141         center.x += sin(rotation)*0.035;
 142         center.y -= cos(rotation)*0.035;
 143         Vector d(center.x-start.x, center.y-start.y);
 144         float x = (d.x*ray.x+d.y*ray.y)/(ray.x*ray.x+ray.y*ray.y);
 145         Vector nearest(start.x+ray.x*x-center.x, start.y+ray.y*x-center.y, start.z+ray.z*x-center.z);
 146         if(nearest.z<0|| nearest.z>0.12)
 147                 return false;
 148         return nearest.x*nearest.x+nearest.y*nearest.y<0.0001;
 149 }
 150
 151 void Signal::tick(const Time::TimeDelta &)
 152 {
 153         if(check_allocated_blocks)
 154         {
 155                 unsigned n_blocks = 0;
 156                 BlockIter iter(block, entry);
 157                 iter = iter.next();
 158                 while(iter && iter->get_train()==train)
 159                 {
 160                         if(iter->get_sensor_id())
 161                                 ++n_blocks;
 162                         iter=iter.next();
 163                 }
 164                 check_allocated_blocks = false;
 165
 166                 const list<SignalType::Indication> &indications = type.get_indications();
 167                 unsigned aspect = indications.back().aspect;
 168                 for(list<SignalType::Indication>::const_iterator i=indications.begin(); i!=indications.end(); ++i)
 169                         if(n_blocks>=i->free_blocks)
 170                         {
 171                                 aspect = i->aspect;
 172                                 break;
 173                         }
 174
 175                 layout.get_driver().set_signal(address, aspect);
 176         }
 177 }
 178
 179 void Signal::block_reserved(const Block &b, Train *t)
 180 {
 181         if(&b==block)
 182         {
 183                 if(t)
 184                 {
 185                         int train_entry = t->get_entry_to_block(*block);
 186                         if(train_entry>=0 && static_cast<unsigned>(train_entry)==entry)
 187                         {
 188                                 if(train_conn)
 189                                         train_conn.disconnect();
 190                                 train = t;
 191                                 passing = false;
 192                                 train_conn = train->signal_advanced.connect(sigc::mem_fun(this, &Signal::train_advanced));
 193                                 check_allocated_blocks = true;
 194                         }
 195                 }
 196                 else
 197                 {
 198                         layout.get_driver().set_signal(address, type.get_indications().back().aspect);
 199                         reset();
 200                 }
 201         }
 202         else if(train && t==train)
 203                 check_allocated_blocks = true;
 204 }
 205
 206 void Signal::train_advanced(Block &b)
 207 {
 208         if(&b==block)
 209                 passing = true;
 210         else if(passing && b.get_sensor_id())
 211         {
 212                 layout.get_driver().set_signal(address, type.get_indications().back().aspect);
 213                 reset();
 214         }
 215 }
 216
 217 void Signal::reset()
 218 {
 219         train = 0;
 220         if(train_conn)
 221                 train_conn.disconnect();
 222         check_allocated_blocks = false;
 223 }
 224
 225 void Signal::save(list<DataFile::Statement> &st) const
 226 {
 227         st.push_back((DataFile::Statement("position"), position.x, position.y, position.z));
 228         st.push_back((DataFile::Statement("rotation"), rotation));
 229         if(address)
 230                 st.push_back((DataFile::Statement("address"), address));
 231 }
 232
 233
 234 Signal::Loader::Loader(Signal &s):
 235         DataFile::ObjectLoader<Signal>(s)
 236 {
 237         add("address",  &Loader::address);
 238         add("position", &Loader::position);
 239         add("rotation", &Loader::rotation);
 240 }
 241
 242 void Signal::Loader::address(unsigned a)
 243 {
 244         obj.set_address(a);
 245 }
 246
 247 void Signal::Loader::position(float x, float y, float z)
 248 {
 249         obj.set_position(Vector(x, y, z));
 250 }
 251
 252 void Signal::Loader::rotation(float d)
 253 {
 254         obj.set_rotation(d);
 255 }
 256
 257 } // namespace R2C2