Archives
/
OpenTTD-patches
mirror of https://github.com/JGRennison/OpenTTD-patches
2
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

(svn r8712) -Codechange/cleanup: replace 'magic' constants with enums, use proper types instead of byte, uint etc., give variables more descriptive names and add some comments.

Browse Source
pull/155/head
rubidium 18 years ago
parent 72e74c29d4
commit fd645aa845
2 changed files with 83 additions and 66 deletions
Show Stats Download Patch File Download Diff File

12
src/rail.h
Unescape Escape View File

@ -106,7 +106,11 @@ static inline TrackBits AxisToTrackBits(Axis a)
/** These are a combination of tracks and directions. Values are 0-5 in one
* direction (corresponding to the Track enum) and 8-13 in the other direction. */
* direction (corresponding to the Track enum) and 8-13 in the other direction.
* 6, 7, 14 and 15 are used to encode the reversing of road vehicles. Those
* reversing track dirs are not considered to be 'valid' except in a small
* corner in the road vehicle controller.
*/
typedef enum Trackdirs {
TRACKDIR_BEGIN = 0,
TRACKDIR_X_NE = 0,
@ -115,14 +119,16 @@ typedef enum Trackdirs {
TRACKDIR_LOWER_E = 3,
TRACKDIR_LEFT_S = 4,
TRACKDIR_RIGHT_S = 5,
/* Note the two missing values here. This enables trackdir -> track
* conversion by doing (trackdir & 7) */
TRACKDIR_RVREV_NE = 6,
TRACKDIR_RVREV_SE = 7,
TRACKDIR_X_SW = 8,
TRACKDIR_Y_NW = 9,
TRACKDIR_UPPER_W = 10,
TRACKDIR_LOWER_W = 11,
TRACKDIR_LEFT_N = 12,
TRACKDIR_RIGHT_N = 13,
TRACKDIR_RVREV_SW = 14,
TRACKDIR_RVREV_NW = 15,
TRACKDIR_END,
INVALID_TRACKDIR = 0xFF,
} Trackdir;

137
src/roadveh_cmd.cpp
Unescape Escape View File

@ -53,17 +53,25 @@ static const uint16 _roadveh_full_adder[63] = {
0, 0, 0, 8, 8, 8, 8
};
static const uint16 _road_veh_fp_ax_and[4] = {
0x1009, 0x16, 0x520, 0x2A00
/** 'Convert' the DiagDirection where a road vehicle enters to the trackdirs it can drive onto */
static const TrackdirBits _road_enter_dir_to_reachable_trackdirs[DIAGDIR_END] = {
TRACKDIR_BIT_LEFT_N | TRACKDIR_BIT_LOWER_E | TRACKDIR_BIT_X_NE, // Enter from north east
TRACKDIR_BIT_LEFT_S | TRACKDIR_BIT_UPPER_E | TRACKDIR_BIT_Y_SE, // Enter from south east
TRACKDIR_BIT_UPPER_W | TRACKDIR_BIT_X_SW | TRACKDIR_BIT_RIGHT_S, // Enter from south west
TRACKDIR_BIT_RIGHT_N | TRACKDIR_BIT_LOWER_W | TRACKDIR_BIT_Y_NW // Enter from north west
};
static const byte _road_reverse_table[4] = {
6, 7, 14, 15
static const Trackdir _road_reverse_table[DIAGDIR_END] = {
TRACKDIR_RVREV_NE, TRACKDIR_RVREV_SE, TRACKDIR_RVREV_SW, TRACKDIR_RVREV_NW
};
static const uint16 _road_pf_table_3[4] = {
0x910, 0x1600, 0x2005, 0x2A
/** 'Convert' the DiagDirection where a road vehicle should exit to
* the trackdirs it can use to drive to the exit direction*/
static const TrackdirBits _road_exit_dir_to_incoming_trackdirs[DIAGDIR_END] = {
TRACKDIR_BIT_LOWER_W | TRACKDIR_BIT_X_SW | TRACKDIR_BIT_LEFT_S,
TRACKDIR_BIT_LEFT_N | TRACKDIR_BIT_UPPER_W | TRACKDIR_BIT_Y_NW,
TRACKDIR_BIT_RIGHT_N | TRACKDIR_BIT_UPPER_E | TRACKDIR_BIT_X_NE,
TRACKDIR_BIT_RIGHT_S | TRACKDIR_BIT_LOWER_E | TRACKDIR_BIT_Y_SE
};
int GetRoadVehImage(const Vehicle* v, Direction direction)
@ -1041,48 +1049,48 @@ static inline NPFFoundTargetData PerfNPFRouteToStationOrTile(TileIndex tile, Tra
return ret;
}
// Returns direction to choose
// or -1 if the direction is currently blocked
static int RoadFindPathToDest(Vehicle* v, TileIndex tile, DiagDirection enterdir)
/**
* Returns direction to for a road vehicle to take or
* INVALID_TRACKDIR if the direction is currently blocked
* @param v the vehicle to do the pathfinding for
* @param tile the where to start the pathfinding
* @param enterdir the direction the vehicle enters the tile from
* @return the trackdir to take
*/
static Trackdir RoadFindPathToDest(Vehicle* v, TileIndex tile, DiagDirection enterdir)
{
#define return_track(x) {best_track = x; goto found_best_track; }
#define return_track(x) { best_track = (Trackdir)x; goto found_best_track; }
uint16 signal;
uint bitmask;
TileIndex desttile;
FindRoadToChooseData frd;
int best_track;
uint best_dist, best_maxlen;
uint i;
Trackdir best_track;
{
uint32 r = GetTileTrackStatus(tile, TRANSPORT_ROAD);
signal = GB(r, 16, 16);
bitmask = GB(r, 0, 16);
}
uint32 r = GetTileTrackStatus(tile, TRANSPORT_ROAD);
TrackdirBits signal = (TrackdirBits)GB(r, 16, 16);
TrackdirBits trackdirs = (TrackdirBits)GB(r, 0, 16);
if (IsTileType(tile, MP_STREET)) {
if (GetRoadTileType(tile) == ROAD_TILE_DEPOT && (!IsTileOwner(tile, v->owner) || GetRoadDepotDirection(tile) == enterdir)) {
/* Road depot owned by another player or with the wrong orientation */
bitmask = 0;
trackdirs = TRACKDIR_BIT_NONE;
}
} else if (IsTileType(tile, MP_STATION) && IsRoadStopTile(tile)) {
if (!IsTileOwner(tile, v->owner) || GetRoadStopDir(tile) == enterdir) {
/* different station owner or wrong orientation */
bitmask = 0;
trackdirs = TRACKDIR_BIT_NONE;
} else {
/* Our station */
RoadStop::Type rstype = (v->cargo_type == CT_PASSENGERS) ? RoadStop::BUS : RoadStop::TRUCK;
if (GetRoadStopType(tile) != rstype) {
// wrong station type
bitmask = 0;
/* Wrong station type */
trackdirs = TRACKDIR_BIT_NONE;
} else {
// proper station type, check if there is free loading bay
/* Proper station type, check if there is free loading bay */
if (!_patches.roadveh_queue &&
!GetRoadStopByTile(tile, rstype)->HasFreeBay()) {
// station is full and RV queuing is off
bitmask = 0;
/* Station is full and RV queuing is off */
trackdirs = TRACKDIR_BIT_NONE;
}
}
}
@ -1092,9 +1100,9 @@ static int RoadFindPathToDest(Vehicle* v, TileIndex tile, DiagDirection enterdir
* stuff, probably even more arguments to GTTS.
*/
/* remove unreachable tracks */
bitmask &= _road_veh_fp_ax_and[enterdir];
if (bitmask == 0) {
/* Remove tracks unreachable from the enter dir */
trackdirs &= _road_enter_dir_to_reachable_trackdirs[enterdir];
if (trackdirs == TRACKDIR_BIT_NONE) {
/* No reachable tracks, so we'll reverse */
return_track(_road_reverse_table[enterdir]);
}
@ -1109,19 +1117,19 @@ static int RoadFindPathToDest(Vehicle* v, TileIndex tile, DiagDirection enterdir
desttile = v->dest_tile;
if (desttile == 0) {
// Pick a random track
return_track(PickRandomBit(bitmask));
/* We've got no destination, pick a random track */
return_track(PickRandomBit(trackdirs));
}
// Only one track to choose between?
if (!(KillFirstBit2x64(bitmask))) {
return_track(FindFirstBit2x64(bitmask));
/* Only one track to choose between? */
if (!(KillFirstBit2x64(trackdirs))) {
return_track(FindFirstBit2x64(trackdirs));
}
if (_patches.yapf.road_use_yapf) {
Trackdir trackdir = YapfChooseRoadTrack(v, tile, enterdir);
if (trackdir != INVALID_TRACKDIR) return_track(trackdir);
return_track(PickRandomBit(bitmask));
return_track(PickRandomBit(trackdirs));
} else if (_patches.new_pathfinding_all) {
NPFFindStationOrTileData fstd;
NPFFoundTargetData ftd;
@ -1132,11 +1140,11 @@ static int RoadFindPathToDest(Vehicle* v, TileIndex tile, DiagDirection enterdir
//debug("Finding path. Enterdir: %d, Trackdir: %d", enterdir, trackdir);
ftd = PerfNPFRouteToStationOrTile(tile - TileOffsByDiagDir(enterdir), trackdir, &fstd, TRANSPORT_ROAD, v->owner, INVALID_RAILTYPE);
if (ftd.best_trackdir == 0xff) {
if (ftd.best_trackdir == INVALID_TRACKDIR) {
/* We are already at our target. Just do something */
//TODO: maybe display error?
//TODO: go straight ahead if possible?
return_track(FindFirstBit2x64(bitmask));
return_track(FindFirstBit2x64(trackdirs));
} else {
/* If ftd.best_bird_dist is 0, we found our target and ftd.best_trackdir contains
the direction we need to take to get there, if ftd.best_bird_dist is not 0,
@ -1160,40 +1168,40 @@ do_it:;
* pretend we are heading for the tile in front, we'll
* see from there */
desttile += TileOffsByDiagDir(dir);
if (desttile == tile && bitmask & _road_pf_table_3[dir]) {
if (desttile == tile && trackdirs & _road_exit_dir_to_incoming_trackdirs[dir]) {
/* If we are already in front of the
* station/depot and we can get in from here,
* we enter */
return_track(FindFirstBit2x64(bitmask & _road_pf_table_3[dir]));
return_track(FindFirstBit2x64(trackdirs & _road_exit_dir_to_incoming_trackdirs[dir]));
}
}
}
// do pathfind
/* Do some pathfinding */
frd.dest = desttile;
best_track = -1;
best_dist = (uint)-1;
best_maxlen = (uint)-1;
i = 0;
do {
if (bitmask & 1) {
if (best_track == -1) best_track = i; // in case we don't find the path, just pick a track
best_track = INVALID_TRACKDIR;
uint best_dist = (uint)-1;
uint best_maxlen = (uint)-1;
uint bitmask = (uint)trackdirs;
for (int i = 0; bitmask != 0; bitmask >>= 1, i++) {
if (HASBIT(bitmask, i)) {
if (best_track == INVALID_TRACKDIR) best_track = (Trackdir)i; // in case we don't find the path, just pick a track
frd.maxtracklen = (uint)-1;
frd.mindist = (uint)-1;
FollowTrack(tile, 0x2000 | TRANSPORT_ROAD, _road_pf_directions[i], EnumRoadTrackFindDist, NULL, &frd);
if (frd.mindist < best_dist || (frd.mindist==best_dist && frd.maxtracklen < best_maxlen)) {
if (frd.mindist < best_dist || (frd.mindist == best_dist && frd.maxtracklen < best_maxlen)) {
best_dist = frd.mindist;
best_maxlen = frd.maxtracklen;
best_track = i;
best_track = (Trackdir)i;
}
}
} while (++i,(bitmask>>=1) != 0);
}
}
found_best_track:;
if (HASBIT(signal, best_track)) return -1;
if (HASBIT(signal, best_track)) return INVALID_TRACKDIR;
return best_track;
}
@ -1208,7 +1216,7 @@ static uint RoadFindPathToStop(const Vehicle *v, TileIndex tile)
// use NPF
NPFFindStationOrTileData fstd;
Trackdir trackdir = GetVehicleTrackdir(v);
assert(trackdir != 0xFF);
assert(trackdir != INVALID_TRACKDIR);
fstd.dest_coords = tile;
fstd.station_index = INVALID_STATION; // indicates that the destination is a tile, not a station
@ -1234,7 +1242,10 @@ static const byte _road_veh_data_1[] = {
15, 15, 11, 11
};
static const byte _roadveh_data_2[4] = { 0, 1, 8, 9 };
/** Converts the exit direction of a depot to trackdir the vehicle is going to drive to */
static const Trackdir _roadveh_depot_exit_trackdir[DIAGDIR_END] = {
TRACKDIR_X_NE, TRACKDIR_Y_SE, TRACKDIR_X_SW, TRACKDIR_Y_NW
};
static void RoadVehController(Vehicle *v)
{
@ -1276,15 +1287,15 @@ static void RoadVehController(Vehicle *v)
/* Vehicle is about to leave a depot */
DiagDirection dir;
const RoadDriveEntry* rdp;
byte rd2;
Trackdir tdir;
v->cur_speed = 0;
dir = GetRoadDepotDirection(v->tile);
v->direction = DiagDirToDir(dir);
rd2 = _roadveh_data_2[dir];
rdp = _road_drive_data[(_opt.road_side << 4) + rd2];
tdir = _roadveh_depot_exit_trackdir[dir];
rdp = _road_drive_data[(_opt.road_side << 4) + tdir];
x = TileX(v->tile) * TILE_SIZE + (rdp[6].x & 0xF);
y = TileY(v->tile) * TILE_SIZE + (rdp[6].y & 0xF);
@ -1298,7 +1309,7 @@ static void RoadVehController(Vehicle *v)
BeginVehicleMove(v);
v->vehstatus &= ~VS_HIDDEN;
v->u.road.state = rd2;
v->u.road.state = tdir;
v->u.road.frame = 6;
v->cur_image = GetRoadVehImage(v, v->direction);
@ -1361,12 +1372,12 @@ static void RoadVehController(Vehicle *v)
if (rd.x & 0x80) {
/* Vehicle is moving to the next tile */
TileIndex tile = v->tile + TileOffsByDiagDir(rd.x & 3);
int dir = RoadFindPathToDest(v, tile, (DiagDirection)(rd.x & 3));
Trackdir dir = RoadFindPathToDest(v, tile, (DiagDirection)(rd.x & 3));
uint32 r;
Direction newdir;
const RoadDriveEntry *rdp;
if (dir == -1) {
if (dir == INVALID_TRACKDIR) {
/* No path was found to destination */
v->cur_speed = 0;
return;
@ -1435,13 +1446,13 @@ again:
if (rd.x & 0x40) {
/* Vehicle has finished turning around, it will now head back onto the same tile */
int dir = RoadFindPathToDest(v, v->tile, (DiagDirection)(rd.x & 3));
Trackdir dir = RoadFindPathToDest(v, v->tile, (DiagDirection)(rd.x & 3));
uint32 r;
int tmp;
Direction newdir;
const RoadDriveEntry *rdp;
if (dir == -1) {
if (dir == INVALID_TRACKDIR) {
/* No path was found to destination */
v->cur_speed = 0;
return;

Write Preview
Loading…
Cancel
Save