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(svn r12545) -Cleanup: Replace some tables of magic values with already existing functions.

This commit is contained in:
frosch 2008-04-03 14:21:17 +00:00
parent f219eb5653
commit 87e5d85d6e
1 changed files with 19 additions and 61 deletions
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80
src/pathfind.cpp
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@ -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;