yapf_node_rail.hpp

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00001 /* $Id: yapf_node_rail.hpp 10393 2007-06-29 23:50:42Z KUDr $ */
00002 
00005 #ifndef  YAPF_NODE_RAIL_HPP
00006 #define  YAPF_NODE_RAIL_HPP
00007 
00009 struct CYapfRailSegmentKey
00010 {
00011   uint32    m_value;
00012 
00013   FORCEINLINE CYapfRailSegmentKey(const CYapfRailSegmentKey& src) : m_value(src.m_value) {}
00014   FORCEINLINE CYapfRailSegmentKey(const CYapfNodeKeyTrackDir& node_key) {Set(node_key);}
00015 
00016   FORCEINLINE void Set(const CYapfRailSegmentKey& src) {m_value = src.m_value;}
00017   FORCEINLINE void Set(const CYapfNodeKeyTrackDir& node_key) {m_value = (((int)node_key.m_tile) << 4) | node_key.m_td;}
00018 
00019   FORCEINLINE int32 CalcHash() const {return m_value;}
00020   FORCEINLINE TileIndex GetTile() const {return (TileIndex)(m_value >> 4);}
00021   FORCEINLINE Trackdir GetTrackdir() const {return (Trackdir)(m_value & 0x0F);}
00022   FORCEINLINE bool operator == (const CYapfRailSegmentKey& other) const {return m_value == other.m_value;}
00023 
00024   void Dump(DumpTarget &dmp) const
00025   {
00026     dmp.WriteTile("tile", GetTile());
00027     dmp.WriteEnumT("td", GetTrackdir());
00028   }
00029 };
00030 
00031 /* Enum used in PfCalcCost() to see why was the segment closed. */
00032 enum EndSegmentReason {
00033   /* The following reasons can be saved into cached segment */
00034   ESR_DEAD_END = 0,      
00035   ESR_RAIL_TYPE,         
00036   ESR_INFINITE_LOOP,     
00037   ESR_SEGMENT_TOO_LONG,  
00038   ESR_CHOICE_FOLLOWS,    
00039   ESR_DEPOT,             
00040   ESR_WAYPOINT,          
00041   ESR_STATION,           
00042 
00043   /* The following reasons are used only internally by PfCalcCost().
00044   *   They should not be found in the cached segment. */
00045   ESR_PATH_TOO_LONG,     
00046   ESR_FIRST_TWO_WAY_RED, 
00047   ESR_LOOK_AHEAD_END,    
00048   ESR_TARGET_REACHED,    
00049 
00050   /* Special values */
00051   ESR_NONE = 0xFF,          
00052 };
00053 
00054 enum EndSegmentReasonBits {
00055   ESRB_NONE = 0,
00056 
00057   ESRB_DEAD_END          = 1 << ESR_DEAD_END,
00058   ESRB_RAIL_TYPE         = 1 << ESR_RAIL_TYPE,
00059   ESRB_INFINITE_LOOP     = 1 << ESR_INFINITE_LOOP,
00060   ESRB_SEGMENT_TOO_LONG  = 1 << ESR_SEGMENT_TOO_LONG,
00061   ESRB_CHOICE_FOLLOWS    = 1 << ESR_CHOICE_FOLLOWS,
00062   ESRB_DEPOT             = 1 << ESR_DEPOT,
00063   ESRB_WAYPOINT          = 1 << ESR_WAYPOINT,
00064   ESRB_STATION           = 1 << ESR_STATION,
00065 
00066   ESRB_PATH_TOO_LONG     = 1 << ESR_PATH_TOO_LONG,
00067   ESRB_FIRST_TWO_WAY_RED = 1 << ESR_FIRST_TWO_WAY_RED,
00068   ESRB_LOOK_AHEAD_END    = 1 << ESR_LOOK_AHEAD_END,
00069   ESRB_TARGET_REACHED    = 1 << ESR_TARGET_REACHED,
00070 
00071   /* Additional (composite) values. */
00072 
00073   /* What reasons mean that the target can be found and needs to be detected. */
00074   ESRB_POSSIBLE_TARGET = ESRB_DEPOT | ESRB_WAYPOINT | ESRB_STATION,
00075 
00076   /* What reasons can be stored back into cached segment. */
00077   ESRB_CACHED_MASK = ESRB_DEAD_END | ESRB_RAIL_TYPE | ESRB_INFINITE_LOOP | ESRB_SEGMENT_TOO_LONG | ESRB_CHOICE_FOLLOWS | ESRB_DEPOT | ESRB_WAYPOINT | ESRB_STATION,
00078 
00079   /* Reasons to abort pathfinding in this direction. */
00080   ESRB_ABORT_PF_MASK = ESRB_DEAD_END | ESRB_PATH_TOO_LONG | ESRB_INFINITE_LOOP | ESRB_FIRST_TWO_WAY_RED,
00081 };
00082 
00083 DECLARE_ENUM_AS_BIT_SET(EndSegmentReasonBits);
00084 
00085 inline CStrA ValueStr(EndSegmentReasonBits bits)
00086 {
00087   static const char* end_segment_reason_names[] = {
00088     "DEAD_END", "RAIL_TYPE", "INFINITE_LOOP", "SEGMENT_TOO_LONG", "CHOICE_FOLLOWS",
00089     "DEPOT", "WAYPOINT", "STATION",
00090     "PATH_TOO_LONG", "FIRST_TWO_WAY_RED", "LOOK_AHEAD_END", "TARGET_REACHED"
00091   };
00092 
00093   CStrA out;
00094   out.Format("0x%04X (%s)", bits, ComposeNameT(bits, end_segment_reason_names, "UNK", ESRB_NONE, "NONE").Data());
00095   return out.Transfer();
00096 }
00097 
00099 struct CYapfRailSegment
00100 {
00101   typedef CYapfRailSegmentKey Key;
00102 
00103   CYapfRailSegmentKey    m_key;
00104   TileIndex              m_last_tile;
00105   Trackdir               m_last_td;
00106   int                    m_cost;
00107   TileIndex              m_last_signal_tile;
00108   Trackdir               m_last_signal_td;
00109   EndSegmentReasonBits   m_end_segment_reason;
00110   CYapfRailSegment*      m_hash_next;
00111 
00112   FORCEINLINE CYapfRailSegment(const CYapfRailSegmentKey& key)
00113     : m_key(key)
00114     , m_last_tile(INVALID_TILE)
00115     , m_last_td(INVALID_TRACKDIR)
00116     , m_cost(-1)
00117     , m_last_signal_tile(INVALID_TILE)
00118     , m_last_signal_td(INVALID_TRACKDIR)
00119     , m_end_segment_reason(ESRB_NONE)
00120     , m_hash_next(NULL)
00121   {}
00122 
00123   FORCEINLINE const Key& GetKey() const {return m_key;}
00124   FORCEINLINE TileIndex GetTile() const {return m_key.GetTile();}
00125   FORCEINLINE CYapfRailSegment* GetHashNext() {return m_hash_next;}
00126   FORCEINLINE void SetHashNext(CYapfRailSegment* next) {m_hash_next = next;}
00127 
00128   void Dump(DumpTarget &dmp) const
00129   {
00130     dmp.WriteStructT("m_key", &m_key);
00131     dmp.WriteTile("m_last_tile", m_last_tile);
00132     dmp.WriteEnumT("m_last_td", m_last_td);
00133     dmp.WriteLine("m_cost = %d", m_cost);
00134     dmp.WriteTile("m_last_signal_tile", m_last_signal_tile);
00135     dmp.WriteEnumT("m_last_signal_td", m_last_signal_td);
00136     dmp.WriteEnumT("m_end_segment_reason", m_end_segment_reason);
00137   }
00138 };
00139 
00141 template <class Tkey_>
00142 struct CYapfRailNodeT
00143   : CYapfNodeT<Tkey_, CYapfRailNodeT<Tkey_> >
00144 {
00145   typedef CYapfNodeT<Tkey_, CYapfRailNodeT<Tkey_> > base;
00146   typedef CYapfRailSegment CachedData;
00147 
00148   CYapfRailSegment *m_segment;
00149   uint16            m_num_signals_passed;
00150   union {
00151     uint32          m_inherited_flags;
00152     struct {
00153       bool          m_targed_seen : 1;
00154       bool          m_choice_seen : 1;
00155       bool          m_last_signal_was_red : 1;
00156     } flags_s;
00157   } flags_u;
00158   SignalType        m_last_red_signal_type;
00159 
00160   FORCEINLINE void Set(CYapfRailNodeT* parent, TileIndex tile, Trackdir td, bool is_choice)
00161   {
00162     base::Set(parent, tile, td, is_choice);
00163     m_segment = NULL;
00164     if (parent == NULL) {
00165       m_num_signals_passed      = 0;
00166       flags_u.m_inherited_flags = 0;
00167       m_last_red_signal_type    = SIGTYPE_NORMAL;
00168     } else {
00169       m_num_signals_passed      = parent->m_num_signals_passed;
00170       flags_u.m_inherited_flags = parent->flags_u.m_inherited_flags;
00171       m_last_red_signal_type    = parent->m_last_red_signal_type;
00172     }
00173     flags_u.flags_s.m_choice_seen |= is_choice;
00174   }
00175 
00176   FORCEINLINE TileIndex GetLastTile() const {assert(m_segment != NULL); return m_segment->m_last_tile;}
00177   FORCEINLINE Trackdir GetLastTrackdir() const {assert(m_segment != NULL); return m_segment->m_last_td;}
00178   FORCEINLINE void SetLastTileTrackdir(TileIndex tile, Trackdir td) {assert(m_segment != NULL); m_segment->m_last_tile = tile; m_segment->m_last_td = td;}
00179 
00180   void Dump(DumpTarget &dmp) const
00181   {
00182     base::Dump(dmp);
00183     dmp.WriteStructT("m_segment", m_segment);
00184     dmp.WriteLine("m_num_signals_passed = %d", m_num_signals_passed);
00185     dmp.WriteLine("m_targed_seen = %s", flags_u.flags_s.m_targed_seen ? "Yes" : "No");
00186     dmp.WriteLine("m_choice_seen = %s", flags_u.flags_s.m_choice_seen ? "Yes" : "No");
00187     dmp.WriteLine("m_last_signal_was_red = %s", flags_u.flags_s.m_last_signal_was_red ? "Yes" : "No");
00188     dmp.WriteEnumT("m_last_red_signal_type", m_last_red_signal_type);
00189   }
00190 };
00191 
00192 // now define two major node types (that differ by key type)
00193 typedef CYapfRailNodeT<CYapfNodeKeyExitDir>  CYapfRailNodeExitDir;
00194 typedef CYapfRailNodeT<CYapfNodeKeyTrackDir> CYapfRailNodeTrackDir;
00195 
00196 // Default NodeList types
00197 typedef CNodeList_HashTableT<CYapfRailNodeExitDir , 10, 12> CRailNodeListExitDir;
00198 typedef CNodeList_HashTableT<CYapfRailNodeTrackDir, 12, 16> CRailNodeListTrackDir;
00199 
00200 
00201 
00202 #endif /* YAPF_NODE_RAIL_HPP */

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