author | truelight |
Thu, 24 Mar 2005 14:43:40 +0000 | |
changeset 1540 | 6eef12dab5bf |
parent 1459 | 19333d7f99b3 |
child 1661 | f3799f2c84fa |
permissions | -rw-r--r-- |
1247 | 1 |
#ifndef NPF_H |
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#define NPF_H |
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#include "ttd.h" |
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#include "aystar.h" |
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#include "vehicle.h" |
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//#define NPF_DEBUG |
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//#define NPF_MARKROUTE //Mark the routes considered by the pathfinder by |
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//mowing grass |
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typedef struct NPFFindStationOrTileData { /* Meant to be stored in AyStar.targetdata */ |
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TileIndex dest_coords; /* An indication of where the station is, for heuristic purposes, or the target tile */ |
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int station_index; /* station index we're heading for, or -1 when we're heading for a tile */ |
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} NPFFindStationOrTileData; |
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enum { /* Indices into AyStar.userdata[] */ |
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NPF_TYPE = 0, /* Contains a TransportTypes value */ |
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NPF_OWNER, /* Contains an Owner value */ |
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}; |
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enum { /* Indices into AyStarNode.userdata[] */ |
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NPF_TRACKDIR_CHOICE = 0, /* The trackdir chosen to get here */ |
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NPF_NODE_FLAGS, |
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}; |
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typedef enum { /* Flags for AyStarNode.userdata[NPF_NODE_FLAGS]. Use NPFGetBit() and NPFGetBit() to use them. */ |
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NPF_FLAG_SEEN_SIGNAL, /* Used to mark that a signal was seen on the way, for rail only */ |
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NPF_FLAG_REVERSE, /* Used to mark that this node was reached from the second start node, if applicable */ |
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NPF_FLAG_LAST_SIGNAL_RED, /* Used to mark that the last signal on this path was red */ |
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NPF_FLAG_TARGET_CHECKED, /* Used by end node checking function of npf to mark |
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that they have evaluated this node. When this |
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flag is on, NPF_FLAG_IS_TARGET is on when the |
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node is a target, and off when it is not. Should |
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never be used directly, only by the end node |
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checking functions for caching of results. */ |
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NPF_FLAG_IS_TARGET, /* See comment for NPF_FLAG_TARGET_CHECKED */ |
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} NPFNodeFlag; |
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typedef struct NPFFoundTargetData { /* Meant to be stored in AyStar.userpath */ |
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uint best_bird_dist; /* The best heuristic found. Is 0 if the target was found */ |
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uint best_path_dist; /* The shortest path. Is (uint)-1 if no path is found */ |
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byte best_trackdir; /* The trackdir that leads to the shortest path/closest birds dist */ |
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AyStarNode node; /* The node within the target the search led us to */ |
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} NPFFoundTargetData; |
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/* These functions below are _not_ re-entrant, in favor of speed! */ |
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/* Will search from the given tile and direction, for a route to the given |
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* station for the given transport type. See the declaration of |
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* NPFFoundTargetData above for the meaning of the result. */ |
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NPFFoundTargetData NPFRouteToStationOrTile(TileIndex tile, byte trackdir, NPFFindStationOrTileData* target, TransportType type, Owner owner); |
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/* Will search as above, but with two start nodes, the second being the |
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* reverse. Look at the NPF_FLAG_REVERSE flag in the result node to see which |
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* direction was taken (NPFGetBit(result.node, NPF_FLAG_REVERSE)) */ |
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NPFFoundTargetData NPFRouteToStationOrTileTwoWay(TileIndex tile1, byte trackdir1, TileIndex tile2, byte trackdir2, NPFFindStationOrTileData* target, TransportType type, Owner owner); |
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/* Will search a route to the closest depot. */ |
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/* Search using breadth first. Good for little track choice and inaccurate |
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* heuristic, such as railway/road */ |
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NPFFoundTargetData NPFRouteToDepotBreadthFirst(TileIndex tile, byte trackdir, TransportType type, Owner owner); |
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/* Search by trying each depot in order of Manhattan Distance. Good for lots |
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* of choices and accurate heuristics, such as water. */ |
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NPFFoundTargetData NPFRouteToDepotTrialError(TileIndex tile, byte trackdir, TransportType type, Owner owner); |
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void NPFFillWithOrderData(NPFFindStationOrTileData* fstd, Vehicle* v); |
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/* |
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* Functions to manipulate the various NPF related flags on an AyStarNode. |
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*/ |
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/** |
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* Returns the current value of the given flag on the given AyStarNode. |
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*/ |
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static inline bool NPFGetFlag(const AyStarNode* node, NPFNodeFlag flag) |
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{ |
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return HASBIT(node->user_data[NPF_NODE_FLAGS], flag); |
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} |
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/** |
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* Sets the given flag on the given AyStarNode to the given value. |
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*/ |
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static inline void NPFSetFlag(AyStarNode* node, NPFNodeFlag flag, bool value) |
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{ |
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if (value) |
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SETBIT(node->user_data[NPF_NODE_FLAGS], flag); |
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else |
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CLRBIT(node->user_data[NPF_NODE_FLAGS], flag); |
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} |
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/* |
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* Some tables considering tracks, directions and signals. |
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* XXX: Better place to but these? |
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*/ |
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/** |
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* Maps a trackdir to the bit that stores its status in the map arrays, in the |
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* direction along with the trackdir. |
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*/ |
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const byte _signal_along_trackdir[14]; |
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/** |
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* Maps a trackdir to the bit that stores its status in the map arrays, in the |
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* direction against the trackdir. |
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*/ |
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const byte _signal_against_trackdir[14]; |
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/** |
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* Maps a trackdir to the trackdirs that can be reached from it (ie, when |
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* entering the next tile. |
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*/ |
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const uint16 _trackdir_reaches_trackdirs[14]; |
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/** |
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* Maps a trackdir to all trackdirs that make 90 deg turns with it. |
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*/ |
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const uint16 _trackdir_crosses_trackdirs[14]; |
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/** |
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* Maps a track to all tracks that make 90 deg turns with it. |
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*/ |
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const byte _track_crosses_tracks[6]; |
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/** |
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* Maps a trackdir to the (4-way) direction the tile is exited when following |
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* that trackdir. |
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*/ |
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const byte _trackdir_to_exitdir[14]; |
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/** |
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* Maps a track and an (4-way) dir to the trackdir that represents the track |
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* with the exit in the given direction. |
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*/ |
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const byte _track_exitdir_to_trackdir[6][4]; |
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/** |
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* Maps a track and a full (8-way) direction to the trackdir that represents |
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* the track running in the given direction. |
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*/ |
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const byte _track_direction_to_trackdir[6][8]; |
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/** |
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* Maps a (4-way) direction to the diagonal track that runs in that |
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* direction. |
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*/ |
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const byte _dir_to_diag_trackdir[4]; |
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/** |
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* Maps a (4-way) direction to the reverse. |
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*/ |
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const byte _reverse_dir[4]; |
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/** |
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* Maps a trackdir to the reverse trackdir. |
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*/ |
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const byte _reverse_trackdir[14]; |
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#define REVERSE_TRACKDIR(trackdir) (trackdir ^ 0x8) |
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#endif // NPF_H |