116 lines
5.0 KiB
C
116 lines
5.0 KiB
C
/* $Id$ */
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#ifndef NPF_H
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#define NPF_H
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#include "openttd.h"
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#include "aystar.h"
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#include "vehicle.h"
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#include "tile.h"
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#include "variables.h"
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//mowing grass
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enum {
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NPF_HASH_BITS = 12, /* The size of the hash used in pathfinding. Just changing this value should be sufficient to change the hash size. Should be an even value. */
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/* Do no change below values */
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NPF_HASH_SIZE = 1 << NPF_HASH_BITS,
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NPF_HASH_HALFBITS = NPF_HASH_BITS / 2,
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NPF_HASH_HALFMASK = (1 << NPF_HASH_HALFBITS) - 1
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};
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enum {
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/** This penalty is the equivalent of "inifite", which means that paths that
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* get this penalty will be chosen, but only if there is no other route
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* without it. Be careful with not applying this penalty to often, or the
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* total path cost might overflow..
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* For now, this is just a Very Big Penalty, we might actually implement
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* this in a nicer way :-)
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*/
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NPF_INFINITE_PENALTY = 1000 * NPF_TILE_LENGTH
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};
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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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NPF_RAILTYPE, /* Contains the RailType value of the engine when NPF_TYPE == TRANSPORT_RAIL. Unused otherwise. */
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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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} 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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Trackdir 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, Trackdir trackdir, NPFFindStationOrTileData* target, TransportType type, Owner owner, RailType railtype);
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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, Trackdir trackdir1, TileIndex tile2, Trackdir trackdir2, NPFFindStationOrTileData* target, TransportType type, Owner owner, RailType railtype);
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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, Trackdir trackdir, TransportType type, Owner owner, RailType railtype);
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/* Same as above but with two start nodes, the second being the reverse. Call
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* NPFGetBit(result.node, NPF_FLAG_REVERSE) to see from which node the path
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* orginated. All pathfs from the second node will have the given
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* reverse_penalty applied (NPF_TILE_LENGTH is the equivalent of one full
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* tile).
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*/
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NPFFoundTargetData NPFRouteToDepotBreadthFirstTwoWay(TileIndex tile1, Trackdir trackdir1, TileIndex tile2, Trackdir trackdir2, TransportType type, Owner owner, RailType railtype, uint reverse_penalty);
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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, Trackdir trackdir, TransportType type, Owner owner, RailType railtype);
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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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#endif /* NPF_H */
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