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@ -456,6 +456,17 @@ static int32 NPFFindDepot(AyStar* as, OpenListNode *current)
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AYSTAR_FOUND_END_NODE : AYSTAR_DONE;
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}
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/** Find any safe and free tile. */
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static int32 NPFFindSafeTile(AyStar *as, OpenListNode *current)
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{
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const Vehicle *v = ((NPFFindStationOrTileData*)as->user_target)->v;
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return
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IsSafeWaitingPosition(v, current->path.node.tile, (Trackdir)current->path.node.direction, true, _settings_game.pf.forbid_90_deg) &&
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IsWaitingPositionFree(v, current->path.node.tile, (Trackdir)current->path.node.direction, _settings_game.pf.forbid_90_deg) ?
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AYSTAR_FOUND_END_NODE : AYSTAR_DONE;
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}
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/* Will find a station identified using the NPFFindStationOrTileData */
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static int32 NPFFindStationOrTile(AyStar* as, OpenListNode *current)
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{
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@ -820,6 +831,18 @@ static void NPFFollowTrack(AyStar* aystar, OpenListNode* current)
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}
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}
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if (NPFGetFlag(¤t->path.node, NPF_FLAG_IGNORE_RESERVED)) {
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/* Mask out any reserved tracks. */
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TrackBits reserved = GetReservedTrackbits(dst_tile);
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trackdirbits &= ~TrackBitsToTrackdirBits(reserved);
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uint bits = TrackdirBitsToTrackBits(trackdirbits);
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int i;
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FOR_EACH_SET_BIT(i, bits) {
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if (TracksOverlap(reserved | TrackToTrackBits((Track)i))) trackdirbits &= ~TrackToTrackdirBits((Track)i);
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}
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}
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/* Enumerate possible track */
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uint i = 0;
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while (trackdirbits != 0) {
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@ -1065,6 +1088,30 @@ NPFFoundTargetData NPFRouteToDepotTrialError(TileIndex tile, Trackdir trackdir,
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return best_result;
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}
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NPFFoundTargetData NPFRouteToSafeTile(const Vehicle *v, TileIndex tile, Trackdir trackdir, bool override_railtype)
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{
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assert(v->type == VEH_TRAIN);
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NPFFindStationOrTileData fstd;
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fstd.v = v;
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fstd.reserve_path = true;
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AyStarNode start1;
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start1.tile = tile;
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/* We set this in case the target is also the start tile, we will just
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* return a not found then */
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start1.user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
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start1.direction = trackdir;
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NPFSetFlag(&start1, NPF_FLAG_IGNORE_RESERVED, true);
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RailTypes railtypes = v->u.rail.compatible_railtypes;
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if (override_railtype) railtypes |= GetRailTypeInfo(v->u.rail.railtype)->compatible_railtypes;
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/* perform a breadth first search. Target is NULL,
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* since we are just looking for any safe tile...*/
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return NPFRouteInternal(&start1, true, NULL, false, &fstd, NPFFindSafeTile, NPFCalcZero, TRANSPORT_RAIL, 0, v->owner, railtypes, 0);
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}
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void InitializeNPF()
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{
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static bool first_init = true;
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