author | richk |
Mon, 26 May 2008 20:45:25 +0000 | |
branch | NewGRF_ports |
changeset 10724 | 68a692eacf22 |
parent 10184 | fcf5fb2548eb |
permissions | -rw-r--r-- |
2186 | 1 |
/* $Id$ */ |
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/** @file pathfind.h The oldest pathfinder that's supported. */ |
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#ifndef PATHFIND_H |
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#define PATHFIND_H |
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#include "direction_type.h" |
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enum { |
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STR_FACTOR = 2, |
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DIAG_FACTOR = 3 |
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}; |
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//#define PF_BENCH // perform simple benchmarks on the train pathfinder (not |
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//supported on all archs) |
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struct TrackPathFinder; |
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typedef bool TPFEnumProc(TileIndex tile, void *data, Trackdir trackdir, uint length); |
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typedef void TPFAfterProc(TrackPathFinder *tpf); |
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typedef bool NTPEnumProc(TileIndex tile, void *data, int track, uint length); |
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#define PATHFIND_GET_LINK_OFFS(tpf, link) ((byte*)(link) - (byte*)tpf->links) |
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#define PATHFIND_GET_LINK_PTR(tpf, link_offs) (TrackPathFinderLink*)((byte*)tpf->links + (link_offs)) |
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/* y7 y6 y5 y4 y3 y2 y1 y0 x7 x6 x5 x4 x3 x2 x1 x0 |
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* y7 y6 y5 y4 y3 y2 y1 y0 x4 x3 x2 x1 x0 0 0 0 |
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* 0 0 y7 y6 y5 y4 y3 y2 y1 y0 x4 x3 x2 x1 x0 0 |
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* 0 0 0 0 y5 y4 y3 y2 y1 y0 x4 x3 x2 x1 x0 0 |
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*/ |
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#define PATHFIND_HASH_TILE(tile) (TileX(tile) & 0x1F) + ((TileY(tile) & 0x1F) << 5) |
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struct TrackPathFinderLink { |
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TileIndex tile; |
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uint16 flags; |
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uint16 next; |
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}; |
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struct RememberData { |
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uint16 cur_length; |
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byte depth; |
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Track last_choosen_track; |
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}; |
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struct TrackPathFinder { |
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int num_links_left; |
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TrackPathFinderLink *new_link; |
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TPFEnumProc *enum_proc; |
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void *userdata; |
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RememberData rd; |
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TrackdirByte the_dir; |
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TransportType tracktype; |
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uint sub_type; |
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bool disable_tile_hash; |
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uint16 hash_head[0x400]; |
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TileIndex hash_tile[0x400]; ///< stores the link index when multi link. |
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TrackPathFinderLink links[0x400]; ///< hopefully, this is enough. |
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}; |
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/** Some flags to modify the behaviour of original pathfinder */ |
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enum PathfindFlags { |
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PATHFIND_FLAGS_NONE = 0, |
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PATHFIND_FLAGS_SHIP_MODE = 0x0800, ///< pathfinder with some optimizations for ships, but does not work for other types. |
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PATHFIND_FLAGS_DISABLE_TILE_HASH = 0x1000, ///< do not check for searching in circles |
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}; |
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DECLARE_ENUM_AS_BIT_SET(PathfindFlags) |
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void FollowTrack(TileIndex tile, PathfindFlags flags, TransportType tt, uint sub_type, DiagDirection direction, TPFEnumProc* enum_proc, TPFAfterProc* after_proc, void* data); |
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void NewTrainPathfind(TileIndex tile, TileIndex dest, RailTypes railtypes, DiagDirection direction, NTPEnumProc* enum_proc, void* data); |
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#endif /* PATHFIND_H */ |