diff options
Diffstat (limited to 'src/pathfind.h')
-rw-r--r-- | src/pathfind.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/src/pathfind.h b/src/pathfind.h new file mode 100644 index 000000000..432d7ea88 --- /dev/null +++ b/src/pathfind.h @@ -0,0 +1,77 @@ +/* $Id$ */ + +#ifndef PATHFIND_H +#define PATHFIND_H + +#include "direction.h" + +enum { + STR_FACTOR = 2, + DIAG_FACTOR = 3 +}; + +//#define PF_BENCH // perform simple benchmarks on the train pathfinder (not +//supported on all archs) + +typedef struct TrackPathFinder TrackPathFinder; +typedef bool TPFEnumProc(TileIndex tile, void *data, int track, uint length, byte *state); +typedef void TPFAfterProc(TrackPathFinder *tpf); + +typedef bool NTPEnumProc(TileIndex tile, void *data, int track, uint length); + +#define PATHFIND_GET_LINK_OFFS(tpf, link) ((byte*)(link) - (byte*)tpf->links) +#define PATHFIND_GET_LINK_PTR(tpf, link_offs) (TrackPathFinderLink*)((byte*)tpf->links + (link_offs)) + +/* y7 y6 y5 y4 y3 y2 y1 y0 x7 x6 x5 x4 x3 x2 x1 x0 + * y7 y6 y5 y4 y3 y2 y1 y0 x4 x3 x2 x1 x0 0 0 0 + * 0 0 y7 y6 y5 y4 y3 y2 y1 y0 x4 x3 x2 x1 x0 0 + * 0 0 0 0 y5 y4 y3 y2 y1 y0 x4 x3 x2 x1 x0 0 + */ +#define PATHFIND_HASH_TILE(tile) (TileX(tile) & 0x1F) + ((TileY(tile) & 0x1F) << 5) + +typedef struct TrackPathFinderLink { + TileIndex tile; + uint16 flags; + uint16 next; +} TrackPathFinderLink; + +typedef struct RememberData { + uint16 cur_length; + byte depth; + byte pft_var6; +} RememberData; + +struct TrackPathFinder { + int num_links_left; + TrackPathFinderLink *new_link; + + TPFEnumProc *enum_proc; + + void *userdata; + + RememberData rd; + + int the_dir; + + byte tracktype; + byte var2; + bool disable_tile_hash; + bool hasbit_13; + + uint16 hash_head[0x400]; + TileIndex hash_tile[0x400]; /* stores the link index when multi link. */ + + TrackPathFinderLink links[0x400]; /* hopefully, this is enough. */ +}; + +void FollowTrack(TileIndex tile, uint16 flags, DiagDirection direction, TPFEnumProc* enum_proc, TPFAfterProc* after_proc, void* data); + +typedef struct { + TileIndex tile; + int length; +} FindLengthOfTunnelResult; +FindLengthOfTunnelResult FindLengthOfTunnel(TileIndex tile, DiagDirection direction); + +void NewTrainPathfind(TileIndex tile, TileIndex dest, RailTypeMask railtypes, DiagDirection direction, NTPEnumProc* enum_proc, void* data); + +#endif /* PATHFIND_H */ |