66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
#ifndef PATHFIND_H
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#define PATHFIND_H
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typedef struct TrackPathFinder TrackPathFinder;
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typedef bool TPFEnumProc(uint tile, void *data, int track, uint length, byte *state);
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typedef void TPFAfterProc(TrackPathFinder *tpf);
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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) (GET_TILE_X(tile) & 0x1F) + ((GET_TILE_Y(tile)&0x1F)<<5)
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typedef struct TrackPathFinderLink {
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TileIndex tile;
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uint16 flags;
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uint16 next;
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} TrackPathFinderLink;
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typedef struct RememberData {
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uint16 cur_length;
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byte depth;
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byte pft_var6;
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} RememberData;
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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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int the_dir;
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byte tracktype;
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byte var2;
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bool disable_tile_hash;
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bool hasbit_13;
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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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void FollowTrack(uint tile, uint16 flags, byte direction, TPFEnumProc *enum_proc, TPFAfterProc *after_proc, void *data);
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typedef struct {
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uint tile;
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int length;
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} FindLengthOfTunnelResult;
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FindLengthOfTunnelResult FindLengthOfTunnel(uint tile, int direction);
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void NewTrainPathfind(uint tile, byte direction, TPFEnumProc *enum_proc, void *data, byte *cache);
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#endif /* PATHFIND_H */
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