diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/pathfinder/npf/npf.cpp | 197 | ||||
| -rw-r--r-- | src/pathfinder/npf/npf.h | 130 |
2 files changed, 87 insertions, 240 deletions
diff --git a/src/pathfinder/npf/npf.cpp b/src/pathfinder/npf/npf.cpp index 1b9489f6b..ad7626f30 100644 --- a/src/pathfinder/npf/npf.cpp +++ b/src/pathfinder/npf/npf.cpp @@ -24,7 +24,60 @@ #include "../../roadstop_base.h" #include "../pathfinder_func.h" #include "../pathfinder_type.h" -#include "npf.h" +#include "aystar.h" + +enum { + NPF_HASH_BITS = 12, ///< The size of the hash used in pathfinding. Just changing this value should be sufficient to change the hash size. Should be an even value. + /* Do no change below values */ + NPF_HASH_SIZE = 1 << NPF_HASH_BITS, + NPF_HASH_HALFBITS = NPF_HASH_BITS / 2, + NPF_HASH_HALFMASK = (1 << NPF_HASH_HALFBITS) - 1 +}; + +/* Meant to be stored in AyStar.targetdata */ +struct NPFFindStationOrTileData { + TileIndex dest_coords; ///< An indication of where the station is, for heuristic purposes, or the target tile + StationID station_index; ///< station index we're heading for, or INVALID_STATION when we're heading for a tile + bool reserve_path; ///< Indicates whether the found path should be reserved + StationType station_type; ///< The type of station we're heading for + bool not_articulated; ///< The (road) vehicle is not articulated + const Vehicle *v; ///< The vehicle we are pathfinding for +}; + +/* Indices into AyStar.userdata[] */ +enum { + NPF_TYPE = 0, ///< Contains a TransportTypes value + NPF_SUB_TYPE, ///< Contains the sub transport type + NPF_OWNER, ///< Contains an Owner value + NPF_RAILTYPES, ///< Contains a bitmask the compatible RailTypes of the engine when NPF_TYPE == TRANSPORT_RAIL. Unused otherwise. +}; + +/* Indices into AyStarNode.userdata[] */ +enum { + NPF_TRACKDIR_CHOICE = 0, ///< The trackdir chosen to get here + NPF_NODE_FLAGS, +}; + +/* Flags for AyStarNode.userdata[NPF_NODE_FLAGS]. Use NPFGetBit() and NPFGetBit() to use them. */ +enum NPFNodeFlag { + NPF_FLAG_SEEN_SIGNAL, ///< Used to mark that a signal was seen on the way, for rail only + NPF_FLAG_2ND_SIGNAL, ///< Used to mark that two signals were seen, rail only + NPF_FLAG_3RD_SIGNAL, ///< Used to mark that three signals were seen, rail only + NPF_FLAG_REVERSE, ///< Used to mark that this node was reached from the second start node, if applicable + NPF_FLAG_LAST_SIGNAL_RED, ///< Used to mark that the last signal on this path was red + NPF_FLAG_IGNORE_START_TILE, ///< Used to mark that the start tile is invalid, and searching should start from the second tile on + NPF_FLAG_TARGET_RESERVED, ///< Used to mark that the possible reservation target is already reserved + NPF_FLAG_IGNORE_RESERVED, ///< Used to mark that reserved tiles should be considered impassable +}; + +/* Meant to be stored in AyStar.userpath */ +struct NPFFoundTargetData { + uint best_bird_dist; ///< The best heuristic found. Is 0 if the target was found + uint best_path_dist; ///< The shortest path. Is UINT_MAX if no path is found + Trackdir best_trackdir; ///< The trackdir that leads to the shortest path/closest birds dist + AyStarNode node; ///< The node within the target the search led us to + bool res_okay; ///< True if a path reservation could be made +}; static AyStar _npf_aystar; @@ -39,6 +92,22 @@ static const uint _trackdir_length[TRACKDIR_END] = { }; /** + * Returns the current value of the given flag on the given AyStarNode. + */ +static inline bool NPFGetFlag(const AyStarNode *node, NPFNodeFlag flag) +{ + return HasBit(node->user_data[NPF_NODE_FLAGS], flag); +} + +/** + * Sets the given flag on the given AyStarNode to the given value. + */ +static inline void NPFSetFlag(AyStarNode *node, NPFNodeFlag flag, bool value) +{ + SB(node->user_data[NPF_NODE_FLAGS], flag, 1, value); +} + +/** * Calculates the minimum distance traveled to get from t0 to t1 when only * using tracks (ie, only making 45 degree turns). Returns the distance in the * NPF scale, ie the number of full tiles multiplied by NPF_TILE_LENGTH to @@ -918,7 +987,10 @@ static NPFFoundTargetData NPFRouteInternal(AyStarNode *start1, bool ignore_start return result; } -NPFFoundTargetData NPFRouteToStationOrTileTwoWay(TileIndex tile1, Trackdir trackdir1, bool ignore_start_tile1, TileIndex tile2, Trackdir trackdir2, bool ignore_start_tile2, NPFFindStationOrTileData *target, TransportType type, uint sub_type, Owner owner, RailTypes railtypes) +/* Will search as below, but with two start nodes, the second being the + * reverse. Look at the NPF_FLAG_REVERSE flag in the result node to see which + * direction was taken (NPFGetBit(result.node, NPF_FLAG_REVERSE)) */ +static NPFFoundTargetData NPFRouteToStationOrTileTwoWay(TileIndex tile1, Trackdir trackdir1, bool ignore_start_tile1, TileIndex tile2, Trackdir trackdir2, bool ignore_start_tile2, NPFFindStationOrTileData *target, TransportType type, uint sub_type, Owner owner, RailTypes railtypes) { AyStarNode start1; AyStarNode start2; @@ -935,12 +1007,22 @@ NPFFoundTargetData NPFRouteToStationOrTileTwoWay(TileIndex tile1, Trackdir track return NPFRouteInternal(&start1, ignore_start_tile1, (IsValidTile(tile2) ? &start2 : NULL), ignore_start_tile2, target, NPFFindStationOrTile, NPFCalcStationOrTileHeuristic, type, sub_type, owner, railtypes, 0); } -NPFFoundTargetData NPFRouteToStationOrTile(TileIndex tile, Trackdir trackdir, bool ignore_start_tile, NPFFindStationOrTileData *target, TransportType type, uint sub_type, Owner owner, RailTypes railtypes) +/* Will search from the given tile and direction, for a route to the given + * station for the given transport type. See the declaration of + * NPFFoundTargetData above for the meaning of the result. */ +static NPFFoundTargetData NPFRouteToStationOrTile(TileIndex tile, Trackdir trackdir, bool ignore_start_tile, NPFFindStationOrTileData *target, TransportType type, uint sub_type, Owner owner, RailTypes railtypes) { return NPFRouteToStationOrTileTwoWay(tile, trackdir, ignore_start_tile, INVALID_TILE, INVALID_TRACKDIR, false, target, type, sub_type, owner, railtypes); } -NPFFoundTargetData NPFRouteToDepotBreadthFirstTwoWay(TileIndex tile1, Trackdir trackdir1, bool ignore_start_tile1, TileIndex tile2, Trackdir trackdir2, bool ignore_start_tile2, TransportType type, uint sub_type, Owner owner, RailTypes railtypes, uint reverse_penalty) +/* Search using breadth first. Good for little track choice and inaccurate + * heuristic, such as railway/road with two start nodes, the second being the reverse. Call + * NPFGetBit(result.node, NPF_FLAG_REVERSE) to see from which node the path + * orginated. All pathfs from the second node will have the given + * reverse_penalty applied (NPF_TILE_LENGTH is the equivalent of one full + * tile). + */ +static NPFFoundTargetData NPFRouteToDepotBreadthFirstTwoWay(TileIndex tile1, Trackdir trackdir1, bool ignore_start_tile1, TileIndex tile2, Trackdir trackdir2, bool ignore_start_tile2, TransportType type, uint sub_type, Owner owner, RailTypes railtypes, uint reverse_penalty) { AyStarNode start1; AyStarNode start2; @@ -959,111 +1041,6 @@ NPFFoundTargetData NPFRouteToDepotBreadthFirstTwoWay(TileIndex tile1, Trackdir t return NPFRouteInternal(&start1, ignore_start_tile1, (IsValidTile(tile2) ? &start2 : NULL), ignore_start_tile2, NULL, NPFFindDepot, NPFCalcZero, type, sub_type, owner, railtypes, reverse_penalty); } -NPFFoundTargetData NPFRouteToDepotBreadthFirst(TileIndex tile, Trackdir trackdir, bool ignore_start_tile, TransportType type, uint sub_type, Owner owner, RailTypes railtypes) -{ - return NPFRouteToDepotBreadthFirstTwoWay(tile, trackdir, ignore_start_tile, INVALID_TILE, INVALID_TRACKDIR, false, type, sub_type, owner, railtypes, 0); -} - -NPFFoundTargetData NPFRouteToDepotTrialError(TileIndex tile, Trackdir trackdir, bool ignore_start_tile, TransportType type, uint sub_type, Owner owner, RailTypes railtypes) -{ - /* Okay, what we're gonna do. First, we look at all depots, calculate - * the manhatten distance to get to each depot. We then sort them by - * distance. We start by trying to plan a route to the closest, then - * the next closest, etc. We stop when the best route we have found so - * far, is shorter than the manhattan distance. This will obviously - * always find the closest depot. It will probably be most efficient - * for ships, since the heuristic will not be to far off then. I hope. - */ - Queue depots; - int r; - NPFFoundTargetData best_result = {UINT_MAX, UINT_MAX, INVALID_TRACKDIR, {INVALID_TILE, INVALID_TRACKDIR, {0, 0}}, false}; - NPFFoundTargetData result; - NPFFindStationOrTileData target; - AyStarNode start; - Depot *current; - Depot *depot; - - init_InsSort(&depots); - /* Okay, let's find all depots that we can use first */ - FOR_ALL_DEPOTS(depot) { - /* Check if this is really a valid depot, it is of the needed type and - * owner */ - if (IsDepotTypeTile(depot->xy, type) && IsTileOwner(depot->xy, owner)) - /* If so, let's add it to the queue, sorted by distance */ - depots.push(&depots, depot, DistanceManhattan(tile, depot->xy)); - } - - /* Now, let's initialise the aystar */ - - /* Initialize procs */ - _npf_aystar.CalculateH = NPFCalcStationOrTileHeuristic; - _npf_aystar.EndNodeCheck = NPFFindStationOrTile; - _npf_aystar.FoundEndNode = NPFSaveTargetData; - _npf_aystar.GetNeighbours = NPFFollowTrack; - switch (type) { - default: NOT_REACHED(); - case TRANSPORT_RAIL: _npf_aystar.CalculateG = NPFRailPathCost; break; - case TRANSPORT_ROAD: _npf_aystar.CalculateG = NPFRoadPathCost; break; - case TRANSPORT_WATER: _npf_aystar.CalculateG = NPFWaterPathCost; break; - } - - /* Initialize target */ - target.station_index = INVALID_STATION; // We will initialize dest_coords inside the loop below - _npf_aystar.user_target = ⌖ - - /* Initialize user_data */ - _npf_aystar.user_data[NPF_TYPE] = type; - _npf_aystar.user_data[NPF_SUB_TYPE] = sub_type; - _npf_aystar.user_data[NPF_OWNER] = owner; - - /* Initialize Start Node */ - start.tile = tile; - start.direction = trackdir; // We will initialize user_data inside the loop below - - /* Initialize Result */ - _npf_aystar.user_path = &result; - best_result.best_path_dist = UINT_MAX; - best_result.best_bird_dist = UINT_MAX; - - /* Just iterate the depots in order of increasing distance */ - while ((current = (Depot*)depots.pop(&depots))) { - /* Check to see if we already have a path shorter than this - * depot's manhattan distance. HACK: We call DistanceManhattan - * again, we should probably modify the queue to give us that - * value... */ - if ( DistanceManhattan(tile, current->xy * NPF_TILE_LENGTH) > best_result.best_path_dist) - break; - - /* Initialize Start Node - * We set this in case the target is also the start tile, we will just - * return a not found then */ - start.user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR; - start.user_data[NPF_NODE_FLAGS] = 0; - NPFSetFlag(&start, NPF_FLAG_IGNORE_START_TILE, ignore_start_tile); - _npf_aystar.addstart(&_npf_aystar, &start, 0); - - /* Initialize result */ - result.best_bird_dist = UINT_MAX; - result.best_path_dist = UINT_MAX; - result.best_trackdir = INVALID_TRACKDIR; - - /* Initialize target */ - target.dest_coords = current->xy; - - /* GO! */ - r = AyStarMain_Main(&_npf_aystar); - assert(r != AYSTAR_STILL_BUSY); - - /* This depot is closer */ - if (result.best_path_dist < best_result.best_path_dist) - best_result = result; - } - if (result.best_bird_dist != 0) { - DEBUG(npf, 1, "Could not find route to any depot from tile 0x%X.", tile); - } - return best_result; -} - void InitializeNPF() { static bool first_init = true; @@ -1081,7 +1058,7 @@ void InitializeNPF() _npf_aystar.max_search_nodes = _settings_game.pf.npf.npf_max_search_nodes; } -void NPFFillWithOrderData(NPFFindStationOrTileData *fstd, const Vehicle *v, bool reserve_path) +static void NPFFillWithOrderData(NPFFindStationOrTileData *fstd, const Vehicle *v, bool reserve_path = false) { /* Ships don't really reach their stations, but the tile in front. So don't * save the station id for ships. For roadvehs we don't store it either, diff --git a/src/pathfinder/npf/npf.h b/src/pathfinder/npf/npf.h deleted file mode 100644 index bdffa164a..000000000 --- a/src/pathfinder/npf/npf.h +++ /dev/null @@ -1,130 +0,0 @@ -/* $Id$ */ - -/* - * This file is part of OpenTTD. - * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2. - * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. - * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>. - */ - -/** @file npf.h New A* pathfinder. */ - -#ifndef NPF_H -#define NPF_H - -#include "aystar.h" -#include "../../station_type.h" -#include "../../rail_type.h" -#include "../../company_type.h" -#include "../../vehicle_type.h" -#include "../../tile_type.h" -#include "../../track_type.h" -#include "../../core/bitmath_func.hpp" -#include "../../transport_type.h" - -/* mowing grass */ -enum { - NPF_HASH_BITS = 12, ///< The size of the hash used in pathfinding. Just changing this value should be sufficient to change the hash size. Should be an even value. - /* Do no change below values */ - NPF_HASH_SIZE = 1 << NPF_HASH_BITS, - NPF_HASH_HALFBITS = NPF_HASH_BITS / 2, - NPF_HASH_HALFMASK = (1 << NPF_HASH_HALFBITS) - 1 -}; - -/* Meant to be stored in AyStar.targetdata */ -struct NPFFindStationOrTileData { - TileIndex dest_coords; ///< An indication of where the station is, for heuristic purposes, or the target tile - StationID station_index; ///< station index we're heading for, or INVALID_STATION when we're heading for a tile - bool reserve_path; ///< Indicates whether the found path should be reserved - StationType station_type; ///< The type of station we're heading for - bool not_articulated; ///< The (road) vehicle is not articulated - const Vehicle *v; ///< The vehicle we are pathfinding for -}; - -/* Indices into AyStar.userdata[] */ -enum { - NPF_TYPE = 0, ///< Contains a TransportTypes value - NPF_SUB_TYPE, ///< Contains the sub transport type - NPF_OWNER, ///< Contains an Owner value - NPF_RAILTYPES, ///< Contains a bitmask the compatible RailTypes of the engine when NPF_TYPE == TRANSPORT_RAIL. Unused otherwise. -}; - -/* Indices into AyStarNode.userdata[] */ -enum { - NPF_TRACKDIR_CHOICE = 0, ///< The trackdir chosen to get here - NPF_NODE_FLAGS, -}; - -/* Flags for AyStarNode.userdata[NPF_NODE_FLAGS]. Use NPFGetBit() and NPFGetBit() to use them. */ -enum NPFNodeFlag { - NPF_FLAG_SEEN_SIGNAL, ///< Used to mark that a signal was seen on the way, for rail only - NPF_FLAG_2ND_SIGNAL, ///< Used to mark that two signals were seen, rail only - NPF_FLAG_3RD_SIGNAL, ///< Used to mark that three signals were seen, rail only - NPF_FLAG_REVERSE, ///< Used to mark that this node was reached from the second start node, if applicable - NPF_FLAG_LAST_SIGNAL_RED, ///< Used to mark that the last signal on this path was red - NPF_FLAG_IGNORE_START_TILE, ///< Used to mark that the start tile is invalid, and searching should start from the second tile on - NPF_FLAG_TARGET_RESERVED, ///< Used to mark that the possible reservation target is already reserved - NPF_FLAG_IGNORE_RESERVED, ///< Used to mark that reserved tiles should be considered impassable -}; - -/* Meant to be stored in AyStar.userpath */ -struct NPFFoundTargetData { - uint best_bird_dist; ///< The best heuristic found. Is 0 if the target was found - uint best_path_dist; ///< The shortest path. Is UINT_MAX if no path is found - Trackdir best_trackdir; ///< The trackdir that leads to the shortest path/closest birds dist - AyStarNode node; ///< The node within the target the search led us to - bool res_okay; ///< True if a path reservation could be made -}; - -/* These functions below are _not_ re-entrant, in favor of speed! */ - -/* Will search from the given tile and direction, for a route to the given - * station for the given transport type. See the declaration of - * NPFFoundTargetData above for the meaning of the result. */ -NPFFoundTargetData NPFRouteToStationOrTile(TileIndex tile, Trackdir trackdir, bool ignore_start_tile, NPFFindStationOrTileData *target, TransportType type, uint sub_type, Owner owner, RailTypes railtypes); - -/* Will search as above, but with two start nodes, the second being the - * reverse. Look at the NPF_FLAG_REVERSE flag in the result node to see which - * direction was taken (NPFGetBit(result.node, NPF_FLAG_REVERSE)) */ -NPFFoundTargetData NPFRouteToStationOrTileTwoWay(TileIndex tile1, Trackdir trackdir1, bool ignore_start_tile1, TileIndex tile2, Trackdir trackdir2, bool ignore_start_tile2, NPFFindStationOrTileData *target, TransportType type, uint sub_type, Owner owner, RailTypes railtypes); - -/* Will search a route to the closest depot. */ - -/* Search using breadth first. Good for little track choice and inaccurate - * heuristic, such as railway/road.*/ -NPFFoundTargetData NPFRouteToDepotBreadthFirst(TileIndex tile, Trackdir trackdir, bool ignore_start_tile, TransportType type, uint sub_type, Owner owner, RailTypes railtypes); -/* Same as above but with two start nodes, the second being the reverse. Call - * NPFGetBit(result.node, NPF_FLAG_REVERSE) to see from which node the path - * orginated. All pathfs from the second node will have the given - * reverse_penalty applied (NPF_TILE_LENGTH is the equivalent of one full - * tile). - */ -NPFFoundTargetData NPFRouteToDepotBreadthFirstTwoWay(TileIndex tile1, Trackdir trackdir1, bool ignore_start_tile1, TileIndex tile2, Trackdir trackdir2, bool ignore_start_tile2, TransportType type, uint sub_type, Owner owner, RailTypes railtypes, uint reverse_penalty); -/* Search by trying each depot in order of Manhattan Distance. Good for lots - * of choices and accurate heuristics, such as water. */ -NPFFoundTargetData NPFRouteToDepotTrialError(TileIndex tile, Trackdir trackdir, bool ignore_start_tile, TransportType type, uint sub_type, Owner owner, RailTypes railtypes); - -void NPFFillWithOrderData(NPFFindStationOrTileData *fstd, const Vehicle *v, bool reserve_path = false); - - -/* - * Functions to manipulate the various NPF related flags on an AyStarNode. - */ - -/** - * Returns the current value of the given flag on the given AyStarNode. - */ -static inline bool NPFGetFlag(const AyStarNode *node, NPFNodeFlag flag) -{ - return HasBit(node->user_data[NPF_NODE_FLAGS], flag); -} - -/** - * Sets the given flag on the given AyStarNode to the given value. - */ -static inline void NPFSetFlag(AyStarNode *node, NPFNodeFlag flag, bool value) -{ - SB(node->user_data[NPF_NODE_FLAGS], flag, 1, value); -} - -#endif /* NPF_H */ |