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Diffstat (limited to 'src/pathfind.cpp')
-rw-r--r--src/pathfind.cpp80
1 files changed, 19 insertions, 61 deletions
diff --git a/src/pathfind.cpp b/src/pathfind.cpp
index 9a25ab8cc..e16836b17 100644
--- a/src/pathfind.cpp
+++ b/src/pathfind.cpp
@@ -112,33 +112,6 @@ static bool TPFSetTileBit(TrackPathFinder *tpf, TileIndex tile, int dir)
return true;
}
-static const byte _bits_mask[4] = {
- 0x19,
- 0x16,
- 0x25,
- 0x2A,
-};
-
-static const DiagDirection _tpf_new_direction[14] = {
- DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_SW, DIAGDIR_SE,
- INVALID_DIAGDIR, INVALID_DIAGDIR,
- DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_NW, DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_NE,
-};
-
-static const DiagDirection _tpf_prev_direction[14] = {
- DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_SE, DIAGDIR_NE, DIAGDIR_SE, DIAGDIR_SW,
- INVALID_DIAGDIR, INVALID_DIAGDIR,
- DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_SW, DIAGDIR_NW, DIAGDIR_NE, DIAGDIR_NW,
-};
-
-
-static const byte _otherdir_mask[4] = {
- 0x10,
- 0,
- 0x5,
- 0x2A,
-};
-
static void TPFModeShip(TrackPathFinder* tpf, TileIndex tile, DiagDirection direction)
{
RememberData rd;
@@ -153,8 +126,7 @@ static void TPFModeShip(TrackPathFinder* tpf, TileIndex tile, DiagDirection dire
if (++tpf->rd.cur_length > 50)
return;
- TrackStatus ts = GetTileTrackStatus(tile, tpf->tracktype, tpf->sub_type);
- TrackBits bits = (TrackBits)(TrackStatusToTrackBits(ts) & _bits_mask[direction]);
+ TrackBits bits = TrackStatusToTrackBits(GetTileTrackStatus(tile, tpf->tracktype, tpf->sub_type)) & DiagdirReachesTracks(direction);
if (bits == TRACK_BIT_NONE) return;
assert(TileX(tile) != MapMaxX() && TileY(tile) != MapMaxY());
@@ -174,10 +146,10 @@ static void TPFModeShip(TrackPathFinder* tpf, TileIndex tile, DiagDirection dire
tpf->rd.last_choosen_track = track;
}
- tpf->the_dir = (Trackdir)(track + (HasBit(_otherdir_mask[direction], track) ? 8 : 0));
+ tpf->the_dir = TrackEnterdirToTrackdir(track, direction);
if (!tpf->enum_proc(tile, tpf->userdata, tpf->the_dir, tpf->rd.cur_length)) {
- TPFModeShip(tpf, tile, _tpf_new_direction[tpf->the_dir]);
+ TPFModeShip(tpf, tile, TrackdirToExitdir(tpf->the_dir));
}
tpf->rd = rd;
@@ -209,8 +181,6 @@ static inline bool CanAccessTileInDir(TileIndex tile, DiagDirection side, Transp
return true;
}
-static const uint16 _tpfmode1_and[4] = { 0x1009, 0x16, 0x520, 0x2A00 };
-
static void TPFModeNormal(TrackPathFinder* tpf, TileIndex tile, DiagDirection direction)
{
const TileIndex tile_org = tile;
@@ -253,37 +223,35 @@ static void TPFModeNormal(TrackPathFinder* tpf, TileIndex tile, DiagDirection di
}
}
- uint32 bits = TrackStatusToTrackdirBits(GetTileTrackStatus(tile, tpf->tracktype, tpf->sub_type));
+ TrackdirBits trackdirbits = TrackStatusToTrackdirBits(GetTileTrackStatus(tile, tpf->tracktype, tpf->sub_type));
/* Check in case of rail if the owner is the same */
if (tpf->tracktype == TRANSPORT_RAIL) {
- if (bits != 0 && TrackStatusToTrackdirBits(GetTileTrackStatus(tile_org, TRANSPORT_RAIL, 0)) != TRACKDIR_BIT_NONE) {
+ if (trackdirbits != TRACKDIR_BIT_NONE && TrackStatusToTrackdirBits(GetTileTrackStatus(tile_org, TRANSPORT_RAIL, 0)) != TRACKDIR_BIT_NONE) {
if (GetTileOwner(tile_org) != GetTileOwner(tile)) return;
}
}
tpf->rd.cur_length++;
- bits &= _tpfmode1_and[direction];
- bits |= bits >> 8;
- bits &= 0xBF;
+ trackdirbits &= DiagdirReachesTrackdirs(direction);
+ TrackBits bits = TrackdirBitsToTrackBits(trackdirbits);
- if (bits != 0) {
+ if (bits != TRACK_BIT_NONE) {
if (!tpf->disable_tile_hash || (tpf->rd.cur_length <= 64 && (KillFirstBit(bits) == 0 || ++tpf->rd.depth <= 7))) {
do {
- int i = FIND_FIRST_BIT(bits);
- bits = KillFirstBit(bits);
+ Track track = RemoveFirstTrack(&bits);
- tpf->the_dir = (Trackdir)((_otherdir_mask[direction] & (byte)(1 << i)) ? (i + 8) : i);
+ tpf->the_dir = TrackEnterdirToTrackdir(track, direction);
RememberData rd = tpf->rd;
/* make sure we are not leaving from invalid side */
if (TPFSetTileBit(tpf, tile, tpf->the_dir) && CanAccessTileInDir(tile, TrackdirToExitdir(tpf->the_dir), tpf->tracktype) &&
!tpf->enum_proc(tile, tpf->userdata, tpf->the_dir, tpf->rd.cur_length) ) {
- TPFModeNormal(tpf, tile, _tpf_new_direction[tpf->the_dir]);
+ TPFModeNormal(tpf, tile, TrackdirToExitdir(tpf->the_dir));
}
tpf->rd = rd;
- } while (bits != 0);
+ } while (bits != TRACK_BIT_NONE);
}
}
}
@@ -331,15 +299,6 @@ struct StackedItem {
byte first_track;
};
-static const Trackdir _new_trackdir[6][4] = {
-{TRACKDIR_X_NE, INVALID_TRACKDIR, TRACKDIR_X_SW, INVALID_TRACKDIR,},
-{INVALID_TRACKDIR, TRACKDIR_Y_SE, INVALID_TRACKDIR, TRACKDIR_Y_NW,},
-{INVALID_TRACKDIR, TRACKDIR_UPPER_E, TRACKDIR_UPPER_W, INVALID_TRACKDIR,},
-{TRACKDIR_LOWER_E, INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_LOWER_W,},
-{TRACKDIR_LEFT_N, TRACKDIR_LEFT_S, INVALID_TRACKDIR, INVALID_TRACKDIR,},
-{INVALID_TRACKDIR, INVALID_TRACKDIR, TRACKDIR_RIGHT_S, TRACKDIR_RIGHT_N,},
-};
-
struct HashLink {
TileIndex tile;
uint16 typelength;
@@ -590,7 +549,7 @@ static void NTPEnum(NewTrackPathFinder* tpf, TileIndex tile, DiagDirection direc
HeapifyDown(tpf);
/* Make sure we havn't already visited this tile. */
- } while (!NtpCheck(tpf, tile, _tpf_prev_direction[si.track], si.cur_length));
+ } while (!NtpCheck(tpf, tile, ReverseDiagDir(TrackdirToExitdir(ReverseTrackdir(si.track))), si.cur_length));
/* Add the length of this track. */
si.cur_length += _length_of_track[si.track];
@@ -600,7 +559,7 @@ callback_and_continue:
return;
assert(si.track <= 13);
- direction = _tpf_new_direction[si.track];
+ direction = TrackdirToExitdir(si.track);
start_at:
/* If the tile is the entry tile of a tunnel, and we're not going out of the tunnel,
@@ -644,8 +603,7 @@ start_at:
if (!IsTileType(tile, MP_RAILWAY) || !IsPlainRailTile(tile)) {
/* We found a tile which is not a normal railway tile.
* Determine which tracks that exist on this tile. */
- TrackStatus ts = GetTileTrackStatus(tile, TRANSPORT_RAIL, 0) & _tpfmode1_and[direction];
- bits = TrackStatusToTrackBits(ts);
+ bits = TrackdirBitsToTrackBits(TrackStatusToTrackdirBits(GetTileTrackStatus(tile, TRANSPORT_RAIL, 0)) & DiagdirReachesTrackdirs(direction));
/* Check that the tile contains exactly one track */
if (bits == 0 || KillFirstBit(bits) != 0) break;
@@ -661,7 +619,7 @@ start_at:
* bits - bitmask of which track that exist on the tile (exactly one bit is set)
* direction - which direction are we moving in?
*******************/
- si.track = _new_trackdir[FIND_FIRST_BIT(bits)][direction];
+ si.track = TrackEnterdirToTrackdir(FindFirstTrack(bits), direction);
si.cur_length += _length_of_track[si.track];
goto callback_and_continue;
}
@@ -684,7 +642,7 @@ start_at:
/* If we reach here, the tile has exactly one track, and this
track is reachable = > Rail segment continues */
- track = _new_trackdir[FIND_FIRST_BIT(bits)][direction];
+ track = TrackEnterdirToTrackdir(FindFirstTrack(bits), direction);
assert(track != INVALID_TRACKDIR);
si.cur_length += _length_of_track[track];
@@ -733,7 +691,7 @@ start_at:
}
/* continue with the next track */
- direction = _tpf_new_direction[track];
+ direction = TrackdirToExitdir(track);
/* safety check if we're running around chasing our tail... (infinite loop) */
if (tile == tile_org) {
@@ -774,7 +732,7 @@ start_at:
si.tile = tile;
while (bits != TRACK_BIT_NONE) {
Track track = RemoveFirstTrack(&bits);
- si.track = _new_trackdir[track][direction];
+ si.track = TrackEnterdirToTrackdir(track, direction);
assert(si.track != 0xFF);
si.priority = si.cur_length + estimation;
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-11 11:19:09 +0000