/* $Id$ */ /** @file tunnelbridge_cmd.cpp * This file deals with tunnels and bridges (non-gui stuff) * @todo seperate this file into two */ #include "stdafx.h" #include "openttd.h" #include "bridge_map.h" #include "rail_map.h" #include "road_map.h" #include "tile_cmd.h" #include "landscape.h" #include "tunnel_map.h" #include "unmovable_map.h" #include "viewport_func.h" #include "command_func.h" #include "town.h" #include "variables.h" #include "bridge.h" #include "train.h" #include "water_map.h" #include "yapf/yapf.h" #include "newgrf_sound.h" #include "autoslope.h" #include "transparency.h" #include "tunnelbridge_map.h" #include "strings_func.h" #include "date_func.h" #include "functions.h" #include "vehicle_func.h" #include "sound_func.h" #include "signal_func.h" #include "tunnelbridge.h" #include "player_base.h" #include "engine_func.h" #include "economy_func.h" #include "rail.h" #include "table/sprites.h" #include "table/strings.h" #include "table/bridge_land.h" BridgeSpec _bridge[MAX_BRIDGES]; /** Reset the data been eventually changed by the grf loaded. */ void ResetBridges() { /* First, free sprite table data */ for (BridgeType i = 0; i < MAX_BRIDGES; i++) { if (_bridge[i].sprite_table != NULL) { for (uint j = 0; j < 7; j++) free(_bridge[i].sprite_table[j]); free(_bridge[i].sprite_table); } } /* Then, wipe out current bidges */ memset(&_bridge, 0, sizeof(_bridge)); /* And finally, reinstall default data */ memcpy(&_bridge, &_orig_bridge, sizeof(_orig_bridge)); } /** calculate the price factor for building a long bridge. * basically the cost delta is 1,1, 1, 2,2, 3,3,3, 4,4,4,4, 5,5,5,5,5, 6,6,6,6,6,6, 7,7,7,7,7,7,7, 8,8,8,8,8,8,8,8, */ int CalcBridgeLenCostFactor(int x) { int n; int r; if (x < 2) return x; x -= 2; for (n = 0, r = 2;; n++) { if (x <= n) return r + x * n; r += n * n; x -= n; } } Foundation GetBridgeFoundation(Slope tileh, Axis axis) { if ((tileh == SLOPE_FLAT) || (((tileh == SLOPE_NE) || (tileh == SLOPE_SW)) && (axis == AXIS_X)) || (((tileh == SLOPE_NW) || (tileh == SLOPE_SE)) && (axis == AXIS_Y))) return FOUNDATION_NONE; return (HasSlopeHighestCorner(tileh) ? InclinedFoundation(axis) : FlatteningFoundation(tileh)); } /** * Determines if the track on a bridge ramp is flat or goes up/down. * * @param tileh Slope of the tile under the bridge head * @param axis Orientation of bridge * @return true iff the track is flat. */ bool HasBridgeFlatRamp(Slope tileh, Axis axis) { ApplyFoundationToSlope(GetBridgeFoundation(tileh, axis), &tileh); /* If the foundation slope is flat the bridge has a non-flat ramp and vice versa. */ return (tileh != SLOPE_FLAT); } static inline const PalSpriteID *GetBridgeSpriteTable(int index, byte table) { const BridgeSpec *bridge = GetBridgeSpec(index); assert(table < 7); if (bridge->sprite_table == NULL || bridge->sprite_table[table] == NULL) { return _bridge_sprite_table[index][table]; } else { return bridge->sprite_table[table]; } } /** * Determines the foundation for the north bridge head, and tests if the resulting slope is valid. * * @param axis Axis of the bridge * @param tileh Slope of the tile under the north bridge head; returns slope on top of foundation * @param z TileZ corresponding to tileh, gets modified as well * @return Error or cost for bridge foundation */ static CommandCost CheckBridgeSlopeNorth(Axis axis, Slope *tileh, uint *z) { Foundation f = GetBridgeFoundation(*tileh, axis); *z += ApplyFoundationToSlope(f, tileh); Slope valid_inclined = (axis == AXIS_X ? SLOPE_NE : SLOPE_NW); if ((*tileh != SLOPE_FLAT) && (*tileh != valid_inclined)) return CMD_ERROR; if (f == FOUNDATION_NONE) return CommandCost(); return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform); } /** * Determines the foundation for the south bridge head, and tests if the resulting slope is valid. * * @param axis Axis of the bridge * @param tileh Slope of the tile under the south bridge head; returns slope on top of foundation * @param z TileZ corresponding to tileh, gets modified as well * @return Error or cost for bridge foundation */ static CommandCost CheckBridgeSlopeSouth(Axis axis, Slope *tileh, uint *z) { Foundation f = GetBridgeFoundation(*tileh, axis); *z += ApplyFoundationToSlope(f, tileh); Slope valid_inclined = (axis == AXIS_X ? SLOPE_SW : SLOPE_SE); if ((*tileh != SLOPE_FLAT) && (*tileh != valid_inclined)) return CMD_ERROR; if (f == FOUNDATION_NONE) return CommandCost(); return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform); } bool CheckBridge_Stuff(BridgeType bridge_type, uint bridge_len) { const BridgeSpec *b = GetBridgeSpec(bridge_type); uint max; // max possible length of a bridge (with patch 100) if (bridge_type >= MAX_BRIDGES) return false; if (b->avail_year > _cur_year) return false; max = b->max_length; if (max >= 16 && _patches.longbridges) max = 100; return b->min_length <= bridge_len && bridge_len <= max; } /** Build a Bridge * @param end_tile end tile * @param flags type of operation * @param p1 packed start tile coords (~ dx) * @param p2 various bitstuffed elements * - p2 = (bit 0- 7) - bridge type (hi bh) * - p2 = (bit 8-..) - rail type or road types. * - p2 = (bit 15 ) - set means road bridge. */ CommandCost CmdBuildBridge(TileIndex end_tile, uint32 flags, uint32 p1, uint32 p2) { BridgeType bridge_type; RailType railtype = INVALID_RAILTYPE; RoadTypes roadtypes = ROADTYPES_NONE; uint x; uint y; uint sx; uint sy; TileIndex tile_start; TileIndex tile_end; Slope tileh_start; Slope tileh_end; uint z_start; uint z_end; TileIndex tile; TileIndexDiff delta; uint bridge_len; Axis direction; CommandCost cost(EXPENSES_CONSTRUCTION); CommandCost ret; bool replace_bridge = false; BridgeType replaced_bridge_type; TransportType transport_type; /* unpack parameters */ bridge_type = GB(p2, 0, 8); if (p1 >= MapSize()) return CMD_ERROR; transport_type = (TransportType)GB(p2, 15, 2); /* type of bridge */ switch (transport_type) { case TRANSPORT_ROAD: roadtypes = (RoadTypes)GB(p2, 8, 3); if (!AreValidRoadTypes(roadtypes) || !HasRoadTypesAvail(_current_player, roadtypes)) return CMD_ERROR; break; case TRANSPORT_RAIL: railtype = (RailType)GB(p2, 8, 8); if (!ValParamRailtype(railtype)) return CMD_ERROR; break; default: /* For now, only TRANSPORT_RAIL and TRANSPORT_ROAD are allowed. * But let not this stops us for preparing the future */ return CMD_ERROR; } x = TileX(end_tile); y = TileY(end_tile); sx = TileX(p1); sy = TileY(p1); /* check if valid, and make sure that (x,y) are smaller than (sx,sy) */ if (x == sx) { if (y == sy) return_cmd_error(STR_5008_CANNOT_START_AND_END_ON); direction = AXIS_Y; if (y > sy) Swap(y, sy); } else if (y == sy) { direction = AXIS_X; if (x > sx) Swap(x, sx); } else { return_cmd_error(STR_500A_START_AND_END_MUST_BE_IN); } /* set and test bridge length, availability */ bridge_len = sx + sy - x - y - 1; if (!CheckBridge_Stuff(bridge_type, bridge_len)) return_cmd_error(STR_5015_CAN_T_BUILD_BRIDGE_HERE); /* retrieve landscape height and ensure it's on land */ tile_start = TileXY(x, y); tile_end = TileXY(sx, sy); if (IsWaterTile(tile_start) || IsWaterTile(tile_end)) { return_cmd_error(STR_02A0_ENDS_OF_BRIDGE_MUST_BOTH); } tileh_start = GetTileSlope(tile_start, &z_start); tileh_end = GetTileSlope(tile_end, &z_end); CommandCost terraform_cost_north = CheckBridgeSlopeNorth(direction, &tileh_start, &z_start); CommandCost terraform_cost_south = CheckBridgeSlopeSouth(direction, &tileh_end, &z_end); if (z_start != z_end) return_cmd_error(STR_BRIDGEHEADS_NOT_SAME_HEIGHT); if (IsBridgeTile(tile_start) && IsBridgeTile(tile_end) && GetOtherBridgeEnd(tile_start) == tile_end && GetTunnelBridgeTransportType(tile_start) == transport_type) { /* Replace a current bridge. */ /* If this is a railway bridge, make sure the railtypes match. */ if (transport_type == TRANSPORT_RAIL && GetRailType(tile_start) != railtype) { return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST); } /* Do not replace town bridges with lower speed bridges. */ if (!(flags & DC_QUERY_COST) && IsTileOwner(tile_start, OWNER_TOWN) && GetBridgeSpec(bridge_type)->speed < GetBridgeSpec(GetBridgeType(tile_start))->speed) { Town *t = ClosestTownFromTile(tile_start, UINT_MAX); if (t == NULL) { return CMD_ERROR; } else { SetDParam(0, t->index); return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES); } } /* Do not replace the bridge with the same bridge type. */ if (!(flags & DC_QUERY_COST) && bridge_type == GetBridgeType(tile_start)) { return_cmd_error(STR_1007_ALREADY_BUILT); } /* Do not allow replacing another player's bridges. */ if (!IsTileOwner(tile_start, _current_player) && !IsTileOwner(tile_start, OWNER_TOWN)) { return_cmd_error(STR_1024_AREA_IS_OWNED_BY_ANOTHER); } cost.AddCost((bridge_len + 1) * _price.clear_bridge); // The cost of clearing the current bridge. replace_bridge = true; replaced_bridge_type = GetBridgeType(tile_start); /* Do not remove road types when upgrading a bridge */ roadtypes |= GetRoadTypes(tile_start); } else { /* Build a new bridge. */ bool allow_on_slopes = (!_is_old_ai_player && _patches.build_on_slopes); /* Try and clear the start landscape */ ret = DoCommand(tile_start, 0, 0, flags, CMD_LANDSCAPE_CLEAR); if (CmdFailed(ret)) return ret; cost = ret; if (CmdFailed(terraform_cost_north) || (terraform_cost_north.GetCost() != 0 && !allow_on_slopes)) return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION); cost.AddCost(terraform_cost_north); /* Try and clear the end landscape */ ret = DoCommand(tile_end, 0, 0, flags, CMD_LANDSCAPE_CLEAR); if (CmdFailed(ret)) return ret; cost.AddCost(ret); /* false - end tile slope check */ if (CmdFailed(terraform_cost_south) || (terraform_cost_south.GetCost() != 0 && !allow_on_slopes)) return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION); cost.AddCost(terraform_cost_south); } if (!replace_bridge) { TileIndex Heads[] = {tile_start, tile_end}; int i; for (i = 0; i < 2; i++) { if (MayHaveBridgeAbove(Heads[i])) { if (IsBridgeAbove(Heads[i])) { TileIndex north_head = GetNorthernBridgeEnd(Heads[i]); if (direction == GetBridgeAxis(Heads[i])) return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST); if (z_start + TILE_HEIGHT == GetBridgeHeight(north_head)) { return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST); } } } } } /* do the drill? */ if (flags & DC_EXEC) { DiagDirection dir = AxisToDiagDir(direction); Owner owner = (replace_bridge && IsTileOwner(tile_start, OWNER_TOWN)) ? OWNER_TOWN : _current_player; switch (transport_type) { case TRANSPORT_RAIL: MakeRailBridgeRamp(tile_start, owner, bridge_type, dir, railtype); MakeRailBridgeRamp(tile_end, owner, bridge_type, ReverseDiagDir(dir), railtype); break; case TRANSPORT_ROAD: MakeRoadBridgeRamp(tile_start, owner, bridge_type, dir, roadtypes); MakeRoadBridgeRamp(tile_end, owner, bridge_type, ReverseDiagDir(dir), roadtypes); break; default: NOT_REACHED(); break; } MarkTileDirtyByTile(tile_start); MarkTileDirtyByTile(tile_end); } delta = (direction == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1)); for (tile = tile_start + delta; tile != tile_end; tile += delta) { if (GetTileMaxZ(tile) > z_start) return_cmd_error(STR_BRIDGE_TOO_LOW_FOR_TERRAIN); if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile) && !replace_bridge) { /* Disallow crossing bridges for the time being */ return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST); } switch (GetTileType(tile)) { case MP_WATER: if (!EnsureNoVehicleOnGround(tile)) return_cmd_error(STR_980E_SHIP_IN_THE_WAY); if (!IsWater(tile) && !IsCoast(tile)) goto not_valid_below; break; case MP_RAILWAY: if (!IsPlainRailTile(tile)) goto not_valid_below; break; case MP_ROAD: if (IsRoadDepot(tile)) goto not_valid_below; break; case MP_TUNNELBRIDGE: if (IsTunnel(tile)) break; if (replace_bridge) break; if (direction == DiagDirToAxis(GetTunnelBridgeDirection(tile))) goto not_valid_below; if (z_start < GetBridgeHeight(tile)) goto not_valid_below; break; case MP_UNMOVABLE: if (!IsOwnedLand(tile)) goto not_valid_below; break; case MP_CLEAR: break; default: not_valid_below:; /* try and clear the middle landscape */ ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); if (CmdFailed(ret)) return ret; cost.AddCost(ret); break; } if (flags & DC_EXEC) { SetBridgeMiddle(tile, direction); MarkTileDirtyByTile(tile); } } if (flags & DC_EXEC && transport_type == TRANSPORT_RAIL) { Track track = AxisToTrack(direction); AddSideToSignalBuffer(tile_start, INVALID_DIAGDIR, _current_player); YapfNotifyTrackLayoutChange(tile_start, track); } /* for human player that builds the bridge he gets a selection to choose from bridges (DC_QUERY_COST) * It's unnecessary to execute this command every time for every bridge. So it is done only * and cost is computed in "bridge_gui.c". For AI, Towns this has to be of course calculated */ if (!(flags & DC_QUERY_COST) || (IsValidPlayer(_current_player) && GetPlayer(_current_player)->is_ai)) { bridge_len += 2; // begin and end tiles/ramps if (IsValidPlayer(_current_player) && !_is_old_ai_player) bridge_len = CalcBridgeLenCostFactor(bridge_len); cost.AddCost((int64)bridge_len * _price.build_bridge * GetBridgeSpec(bridge_type)->price >> 8); } return cost; } /** Build Tunnel. * @param start_tile start tile of tunnel * @param flags type of operation * @param p1 railtype or roadtypes. bit 9 set means road tunnel * @param p2 unused */ CommandCost CmdBuildTunnel(TileIndex start_tile, uint32 flags, uint32 p1, uint32 p2) { TileIndexDiff delta; TileIndex end_tile; DiagDirection direction; Slope start_tileh; Slope end_tileh; TransportType transport_type = (TransportType)GB(p1, 9, 1); uint start_z; uint end_z; CommandCost cost(EXPENSES_CONSTRUCTION); CommandCost ret; _build_tunnel_endtile = 0; if (transport_type == TRANSPORT_RAIL) { if (!ValParamRailtype((RailType)p1)) return CMD_ERROR; } else { const RoadTypes rts = (RoadTypes)GB(p1, 0, 3); if (!AreValidRoadTypes(rts) || !HasRoadTypesAvail(_current_player, rts)) return CMD_ERROR; } start_tileh = GetTileSlope(start_tile, &start_z); direction = GetInclinedSlopeDirection(start_tileh); if (direction == INVALID_DIAGDIR) return_cmd_error(STR_500B_SITE_UNSUITABLE_FOR_TUNNEL); if (IsWaterTile(start_tile)) return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER); ret = DoCommand(start_tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); if (CmdFailed(ret)) return ret; /* XXX - do NOT change 'ret' in the loop, as it is used as the price * for the clearing of the entrance of the tunnel. Assigning it to * cost before the loop will yield different costs depending on start- * position, because of increased-cost-by-length: 'cost += cost >> 3' */ delta = TileOffsByDiagDir(direction); DiagDirection tunnel_in_way_dir; if (OtherAxis(DiagDirToAxis(direction)) == AXIS_X) { tunnel_in_way_dir = (TileX(start_tile) < (MapMaxX() / 2)) ? DIAGDIR_SW : DIAGDIR_NE; } else { tunnel_in_way_dir = (TileY(start_tile) < (MapMaxX() / 2)) ? DIAGDIR_SE : DIAGDIR_NW; } end_tile = start_tile; /** Tile shift coeficient. Will decrease for very long tunnels to avoid exponential growth of price*/ int tiles_coef = 3; /** Number of tiles from start of tunnel */ int tiles = 0; /** Number of tiles at which the cost increase coefficient per tile is halved */ int tiles_bump = 25; for (;;) { end_tile += delta; end_tileh = GetTileSlope(end_tile, &end_z); if (start_z == end_z) break; if (!_cheats.crossing_tunnels.value && IsTunnelInWayDir(end_tile, start_z, tunnel_in_way_dir)) { return_cmd_error(STR_5003_ANOTHER_TUNNEL_IN_THE_WAY); } tiles++; if (tiles == tiles_bump) { tiles_coef++; tiles_bump *= 2; } cost.AddCost(_price.build_tunnel); cost.AddCost(cost.GetCost() >> tiles_coef); // add a multiplier for longer tunnels } /* Add the cost of the entrance */ cost.AddCost(_price.build_tunnel); cost.AddCost(ret); /* if the command fails from here on we want the end tile to be highlighted */ _build_tunnel_endtile = end_tile; if (IsWaterTile(end_tile)) return_cmd_error(STR_3807_CAN_T_BUILD_ON_WATER); /* slope of end tile must be complementary to the slope of the start tile */ if (end_tileh != ComplementSlope(start_tileh)) { /* Check if there is a structure on the terraformed tile. Do not add the cost, that will be done by the terraforming */ ret = DoCommand(end_tile, 0, 0, DC_AUTO, CMD_LANDSCAPE_CLEAR); if (CmdFailed(ret)) return_cmd_error(STR_5005_UNABLE_TO_EXCAVATE_LAND); ret = DoCommand(end_tile, end_tileh & start_tileh, 0, flags, CMD_TERRAFORM_LAND); if (CmdFailed(ret)) return_cmd_error(STR_5005_UNABLE_TO_EXCAVATE_LAND); } else { ret = DoCommand(end_tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); if (CmdFailed(ret)) return ret; } cost.AddCost(_price.build_tunnel); cost.AddCost(ret); if (flags & DC_EXEC) { if (transport_type == TRANSPORT_RAIL) { MakeRailTunnel(start_tile, _current_player, direction, (RailType)GB(p1, 0, 4)); MakeRailTunnel(end_tile, _current_player, ReverseDiagDir(direction), (RailType)GB(p1, 0, 4)); AddSideToSignalBuffer(start_tile, INVALID_DIAGDIR, _current_player); YapfNotifyTrackLayoutChange(start_tile, AxisToTrack(DiagDirToAxis(direction))); } else { MakeRoadTunnel(start_tile, _current_player, direction, (RoadTypes)GB(p1, 0, 3)); MakeRoadTunnel(end_tile, _current_player, ReverseDiagDir(direction), (RoadTypes)GB(p1, 0, 3)); } } return cost; } static inline bool CheckAllowRemoveTunnelBridge(TileIndex tile) { /* Floods can remove anything as well as the scenario editor */ if (_current_player == OWNER_WATER || _game_mode == GM_EDITOR) return true; /* Obviously if the bridge/tunnel belongs to us, or no-one, we can remove it */ if (CheckTileOwnership(tile) || IsTileOwner(tile, OWNER_NONE)) return true; /* Otherwise we can only remove town-owned stuff with extra patch-settings, or cheat */ if (IsTileOwner(tile, OWNER_TOWN) && (_patches.extra_dynamite || _cheats.magic_bulldozer.value)) return true; return false; } static CommandCost DoClearTunnel(TileIndex tile, uint32 flags) { Town *t = NULL; TileIndex endtile; if (!CheckAllowRemoveTunnelBridge(tile)) return CMD_ERROR; endtile = GetOtherTunnelEnd(tile); if (GetVehicleTunnelBridge(tile, endtile) != NULL) return CMD_ERROR; _build_tunnel_endtile = endtile; if (IsTileOwner(tile, OWNER_TOWN) && _game_mode != GM_EDITOR) { t = ClosestTownFromTile(tile, (uint)-1); // town penalty rating /* Check if you are allowed to remove the tunnel owned by a town * Removal depends on difficulty settings */ if (!CheckforTownRating(flags, t, TUNNELBRIDGE_REMOVE)) { SetDParam(0, t->index); return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES); } } /* checks if the owner is town then decrease town rating by RATING_TUNNEL_BRIDGE_DOWN_STEP until * you have a "Poor" (0) town rating */ if (IsTileOwner(tile, OWNER_TOWN) && _game_mode != GM_EDITOR) { ChangeTownRating(t, RATING_TUNNEL_BRIDGE_DOWN_STEP, RATING_TUNNEL_BRIDGE_MINIMUM); } if (flags & DC_EXEC) { if (GetTunnelBridgeTransportType(tile) == TRANSPORT_RAIL) { /* We first need to request values before calling DoClearSquare */ DiagDirection dir = GetTunnelBridgeDirection(tile); Owner owner = GetTileOwner(tile); DoClearSquare(tile); DoClearSquare(endtile); /* cannot use INVALID_DIAGDIR for signal update because the tunnel doesn't exist anymore */ AddSideToSignalBuffer(tile, ReverseDiagDir(dir), owner); AddSideToSignalBuffer(endtile, dir, owner); Track track = AxisToTrack(DiagDirToAxis(dir)); YapfNotifyTrackLayoutChange(tile, track); YapfNotifyTrackLayoutChange(endtile, track); } else { DoClearSquare(tile); DoClearSquare(endtile); } } return CommandCost(EXPENSES_CONSTRUCTION, _price.clear_tunnel * (GetTunnelBridgeLength(tile, endtile) + 2)); } static CommandCost DoClearBridge(TileIndex tile, uint32 flags) { DiagDirection direction; TileIndexDiff delta; TileIndex endtile; Town *t = NULL; if (!CheckAllowRemoveTunnelBridge(tile)) return CMD_ERROR; endtile = GetOtherBridgeEnd(tile); if (GetVehicleTunnelBridge(tile, endtile) != NULL) return CMD_ERROR; direction = GetTunnelBridgeDirection(tile); delta = TileOffsByDiagDir(direction); if (IsTileOwner(tile, OWNER_TOWN) && _game_mode != GM_EDITOR) { t = ClosestTownFromTile(tile, (uint)-1); // town penalty rating /* Check if you are allowed to remove the bridge owned by a town * Removal depends on difficulty settings */ if (!CheckforTownRating(flags, t, TUNNELBRIDGE_REMOVE)) { SetDParam(0, t->index); return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES); } } /* checks if the owner is town then decrease town rating by RATING_TUNNEL_BRIDGE_DOWN_STEP until * you have a "Poor" (0) town rating */ if (IsTileOwner(tile, OWNER_TOWN) && _game_mode != GM_EDITOR) { ChangeTownRating(t, RATING_TUNNEL_BRIDGE_DOWN_STEP, RATING_TUNNEL_BRIDGE_MINIMUM); } if (flags & DC_EXEC) { /* read this value before actual removal of bridge */ bool rail = GetTunnelBridgeTransportType(tile) == TRANSPORT_RAIL; Owner owner = GetTileOwner(tile); uint height = GetBridgeHeight(tile); DoClearSquare(tile); DoClearSquare(endtile); for (TileIndex c = tile + delta; c != endtile; c += delta) { /* do not let trees appear from 'nowhere' after removing bridge */ if (IsNormalRoadTile(c) && GetRoadside(c) == ROADSIDE_TREES) { uint minz = GetTileMaxZ(c) + 3 * TILE_HEIGHT; if (height < minz) SetRoadside(c, ROADSIDE_PAVED); } ClearBridgeMiddle(c); MarkTileDirtyByTile(c); } if (rail) { /* cannot use INVALID_DIAGDIR for signal update because the bridge doesn't exist anymore */ AddSideToSignalBuffer(tile, ReverseDiagDir(direction), owner); AddSideToSignalBuffer(endtile, direction, owner); Track track = AxisToTrack(DiagDirToAxis(direction)); YapfNotifyTrackLayoutChange(tile, track); YapfNotifyTrackLayoutChange(endtile, track); } } return CommandCost(EXPENSES_CONSTRUCTION, (GetTunnelBridgeLength(tile, endtile) + 2) * _price.clear_bridge); } static CommandCost ClearTile_TunnelBridge(TileIndex tile, byte flags) { if (IsTunnel(tile)) { if (flags & DC_AUTO) return_cmd_error(STR_5006_MUST_DEMOLISH_TUNNEL_FIRST); return DoClearTunnel(tile, flags); } else { // IsBridge(tile) if (flags & DC_AUTO) return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST); return DoClearBridge(tile, flags); } return CMD_ERROR; } /** * Draws the pillars under high bridges. * * @param psid Image and palette of a bridge pillar. * @param ti #TileInfo of current bridge-middle-tile. * @param axis Orientation of bridge. * @param type Bridge type. * @param x Sprite X position of front pillar. * @param y Sprite Y position of front pillar. * @param z_bridge Absolute height of bridge bottom. */ static void DrawBridgePillars(const PalSpriteID *psid, const TileInfo* ti, Axis axis, BridgeType type, int x, int y, int z_bridge) { /* Do not draw bridge pillars if they are invisible */ if (IsInvisibilitySet(TO_BRIDGES)) return; SpriteID image = psid->sprite; if (image != 0) { bool drawfarpillar = !HasBit(GetBridgeSpec(type)->flags, 0); /* "side" specifies the side the pillars stand on. * The length of the pillars is then set to the height of the bridge over the corners of this edge. * * axis==AXIS_X axis==AXIS_Y * side==false SW NW * side==true NE SE * * I have no clue, why this was done this way. */ bool side = HasBit(image, 0); /* "dir" means the edge the pillars stand on */ DiagDirection dir = AxisToDiagDir(axis); if (side != (axis == AXIS_Y)) dir = ReverseDiagDir(dir); /* Determine ground height under pillars */ int front_height = ti->z; int back_height = ti->z; GetSlopeZOnEdge(ti->tileh, dir, &front_height, &back_height); /* x and y size of bounding-box of pillars */ int w = (axis == AXIS_X ? 16 : 2); int h = (axis == AXIS_X ? 2 : 16); /* sprite position of back facing pillar */ int x_back = x - (axis == AXIS_X ? 0 : 9); int y_back = y - (axis == AXIS_X ? 9 : 0); for (int cur_z = z_bridge; cur_z >= front_height || cur_z >= back_height; cur_z -= TILE_HEIGHT) { /* Draw front facing pillar */ if (cur_z >= front_height) { AddSortableSpriteToDraw(image, psid->pal, x, y, w, h, BB_HEIGHT_UNDER_BRIDGE - 5, cur_z, IsTransparencySet(TO_BRIDGES), 0, 0, -5); } /* Draw back facing pillar, but not the highest part directly under the bridge-floor */ if (drawfarpillar && cur_z >= back_height && cur_z < z_bridge - TILE_HEIGHT) { AddSortableSpriteToDraw(image, psid->pal, x_back, y_back, w, h, BB_HEIGHT_UNDER_BRIDGE - 5, cur_z, IsTransparencySet(TO_BRIDGES), 0, 0, -5); } } } } /** * Draws the trambits over an already drawn (lower end) of a bridge. * @param x the x of the bridge * @param y the y of the bridge * @param z the z of the bridge * @param offset number representing whether to level or sloped and the direction * @param overlay do we want to still see the road? * @param head are we drawing bridge head? */ static void DrawBridgeTramBits(int x, int y, byte z, int offset, bool overlay, bool head) { static const SpriteID tram_offsets[2][6] = { { 107, 108, 109, 110, 111, 112 }, { 4, 5, 15, 16, 17, 18 } }; static const SpriteID back_offsets[6] = { 95, 96, 99, 102, 100, 101 }; static const SpriteID front_offsets[6] = { 97, 98, 103, 106, 104, 105 }; static const uint size_x[6] = { 1, 16, 16, 1, 16, 1 }; static const uint size_y[6] = { 16, 1, 1, 16, 1, 16 }; static const uint front_bb_offset_x[6] = { 15, 0, 0, 15, 0, 15 }; static const uint front_bb_offset_y[6] = { 0, 15, 15, 0, 15, 0 }; /* The sprites under the vehicles are drawn as SpriteCombine. StartSpriteCombine() has already been called * The bounding boxes here are the same as for bridge front/roof */ if (head || !IsInvisibilitySet(TO_BRIDGES)) { AddSortableSpriteToDraw(SPR_TRAMWAY_BASE + tram_offsets[overlay][offset], PAL_NONE, x, y, size_x[offset], size_y[offset], 0x28, z, !head && IsTransparencySet(TO_BRIDGES)); } /* Do not draw catenary if it is set invisible */ if (!IsInvisibilitySet(TO_CATENARY)) { AddSortableSpriteToDraw(SPR_TRAMWAY_BASE + back_offsets[offset], PAL_NONE, x, y, size_x[offset], size_y[offset], 0x28, z, IsTransparencySet(TO_CATENARY)); } /* Start a new SpriteCombine for the front part */ EndSpriteCombine(); StartSpriteCombine(); /* For sloped sprites the bounding box needs to be higher, as the pylons stop on a higher point */ if (!IsInvisibilitySet(TO_CATENARY)) { AddSortableSpriteToDraw(SPR_TRAMWAY_BASE + front_offsets[offset], PAL_NONE, x, y, size_x[offset] + front_bb_offset_x[offset], size_y[offset] + front_bb_offset_y[offset], 0x28, z, IsTransparencySet(TO_CATENARY), front_bb_offset_x[offset], front_bb_offset_y[offset]); } } /** * Draws a tunnel of bridge tile. * For tunnels, this is rather simple, as you only needa draw the entrance. * Bridges are a bit more complex. base_offset is where the sprite selection comes into play * and it works a bit like a bitmask.

For bridge heads: * @param ti TileInfo of the structure to draw *

* Please note that in this code, "roads" are treated as railtype 1, whilst the real railtypes are 0, 2 and 3 */ static void DrawTile_TunnelBridge(TileInfo *ti) { SpriteID image; TransportType transport_type = GetTunnelBridgeTransportType(ti->tile); DiagDirection tunnelbridge_direction = GetTunnelBridgeDirection(ti->tile); if (IsTunnel(ti->tile)) { /* Front view of tunnel bounding boxes: * * 122223 <- BB_Z_SEPARATOR * 1 3 * 1 3 1,3 = empty helper BB * 1 3 2 = SpriteCombine of tunnel-roof and catenary (tram & elrail) * */ static const int _tunnel_BB[4][12] = { /* tunnnel-roof | Z-separator | tram-catenary * w h bb_x bb_y| x y w h |bb_x bb_y w h */ { 1, 0, -15, -14, 0, 15, 16, 1, 0, 1, 16, 15 }, // NE { 0, 1, -14, -15, 15, 0, 1, 16, 1, 0, 15, 16 }, // SE { 1, 0, -15, -14, 0, 15, 16, 1, 0, 1, 16, 15 }, // SW { 0, 1, -14, -15, 15, 0, 1, 16, 1, 0, 15, 16 }, // NW }; const int *BB_data = _tunnel_BB[tunnelbridge_direction]; bool catenary = false; if (transport_type == TRANSPORT_RAIL) { image = GetRailTypeInfo(GetRailType(ti->tile))->base_sprites.tunnel; } else { image = SPR_TUNNEL_ENTRY_REAR_ROAD; } if (HasTunnelBridgeSnowOrDesert(ti->tile)) image += 32; image += tunnelbridge_direction * 2; DrawGroundSprite(image, PAL_NONE); if (transport_type == TRANSPORT_ROAD) { RoadTypes rts = GetRoadTypes(ti->tile); if (HasBit(rts, ROADTYPE_TRAM)) { static const SpriteID tunnel_sprites[2][4] = { { 28, 78, 79, 27 }, { 5, 76, 77, 4 } }; DrawGroundSprite(SPR_TRAMWAY_BASE + tunnel_sprites[rts - ROADTYPES_TRAM][tunnelbridge_direction], PAL_NONE); /* Do not draw wires if they are invisible */ if (!IsInvisibilitySet(TO_CATENARY)) { catenary = true; StartSpriteCombine(); AddSortableSpriteToDraw(SPR_TRAMWAY_TUNNEL_WIRES + tunnelbridge_direction, PAL_NONE, ti->x, ti->y, BB_data[10], BB_data[11], TILE_HEIGHT, ti->z, IsTransparencySet(TO_CATENARY), BB_data[8], BB_data[9], BB_Z_SEPARATOR); } } } else if (!IsInvisibilitySet(TO_CATENARY) && HasCatenary(GetRailType(ti->tile))) { DrawCatenary(ti); catenary = true; StartSpriteCombine(); DrawCatenaryOnTunnel(ti); } AddSortableSpriteToDraw(image + 1, PAL_NONE, ti->x + TILE_SIZE - 1, ti->y + TILE_SIZE - 1, BB_data[0], BB_data[1], TILE_HEIGHT, ti->z, false, BB_data[2], BB_data[3], BB_Z_SEPARATOR); if (catenary) EndSpriteCombine(); /* Add helper BB for sprite sorting, that separate the tunnel from things beside of it */ AddSortableSpriteToDraw(SPR_EMPTY_BOUNDING_BOX, PAL_NONE, ti->x , ti->y , BB_data[6], BB_data[7], TILE_HEIGHT, ti->z); AddSortableSpriteToDraw(SPR_EMPTY_BOUNDING_BOX, PAL_NONE, ti->x + BB_data[4], ti->y + BB_data[5], BB_data[6], BB_data[7], TILE_HEIGHT, ti->z); DrawBridgeMiddle(ti); } else { // IsBridge(ti->tile) const PalSpriteID *psid; int base_offset; bool ice = HasTunnelBridgeSnowOrDesert(ti->tile); if (transport_type == TRANSPORT_RAIL) { base_offset = GetRailTypeInfo(GetRailType(ti->tile))->bridge_offset; assert(base_offset != 8); // This one is used for roads } else { base_offset = 8; } /* as the lower 3 bits are used for other stuff, make sure they are clear */ assert( (base_offset & 0x07) == 0x00); DrawFoundation(ti, GetBridgeFoundation(ti->tileh, DiagDirToAxis(tunnelbridge_direction))); /* HACK Wizardry to convert the bridge ramp direction into a sprite offset */ base_offset += (6 - tunnelbridge_direction) % 4; if (ti->tileh == SLOPE_FLAT) base_offset += 4; // sloped bridge head /* Table number 6 always refers to the bridge heads for any bridge type */ psid = &GetBridgeSpriteTable(GetBridgeType(ti->tile), 6)[base_offset]; if (!ice) { DrawClearLandTile(ti, 3); } else { DrawGroundSprite(SPR_FLAT_SNOWY_TILE + _tileh_to_sprite[ti->tileh], PAL_NONE); } /* draw ramp */ /* Draw Trambits as SpriteCombine */ if (transport_type == TRANSPORT_ROAD) StartSpriteCombine(); /* HACK set the height of the BB of a sloped ramp to 1 so a vehicle on * it doesn't disappear behind it */ /* Bridge heads are drawn solid no matter how invisibility/transparency is set */ AddSortableSpriteToDraw(psid->sprite, psid->pal, ti->x, ti->y, 16, 16, ti->tileh == SLOPE_FLAT ? 0 : 8, ti->z); if (transport_type == TRANSPORT_ROAD) { RoadTypes rts = GetRoadTypes(ti->tile); if (HasBit(rts, ROADTYPE_TRAM)) { uint offset = tunnelbridge_direction; uint z = ti->z; if (ti->tileh != SLOPE_FLAT) { offset = (offset + 1) & 1; z += TILE_HEIGHT; } else { offset += 2; } /* DrawBridgeTramBits() calls EndSpriteCombine() and StartSpriteCombine() */ DrawBridgeTramBits(ti->x, ti->y, z, offset, HasBit(rts, ROADTYPE_ROAD), true); } EndSpriteCombine(); } else if (HasCatenary(GetRailType(ti->tile))) { DrawCatenary(ti); } DrawBridgeMiddle(ti); } } /** Compute bridge piece. Computes the bridge piece to display depending on the position inside the bridge. * bridges pieces sequence (middle parts) * bridge len 1: 0 * bridge len 2: 0 1 * bridge len 3: 0 4 1 * bridge len 4: 0 2 3 1 * bridge len 5: 0 2 5 3 1 * bridge len 6: 0 2 3 2 3 1 * bridge len 7: 0 2 3 4 2 3 1 * #0 - always as first, #1 - always as last (if len>1) * #2,#3 are to pair in order * for odd bridges: #5 is going in the bridge middle if on even position, #4 on odd (counting from 0) * @param north Northernmost tile of bridge * @param south Southernmost tile of bridge * @return Index of bridge piece */ static uint CalcBridgePiece(uint north, uint south) { if (north == 1) { return 0; } else if (south == 1) { return 1; } else if (north < south) { return north & 1 ? 3 : 2; } else if (north > south) { return south & 1 ? 2 : 3; } else { return north & 1 ? 5 : 4; } } void DrawBridgeMiddle(const TileInfo* ti) { /* Sectional view of bridge bounding boxes: * * 1 2 1,2 = SpriteCombine of Bridge front/(back&floor) and TramCatenary * 1 2 3 = empty helper BB * 1 7 2 4,5 = pillars under higher bridges * 1 6 88888 6 2 6 = elrail-pylons * 1 6 88888 6 2 7 = elrail-wire * 1 6 88888 6 2 <- TILE_HEIGHT 8 = rail-vehicle on bridge * 3333333333333 <- BB_Z_SEPARATOR * <- unused * 4 5 <- BB_HEIGHT_UNDER_BRIDGE * 4 5 * 4 5 * */ /* Z position of the bridge sprites relative to bridge height (downwards) */ static const int BRIDGE_Z_START = 3; const PalSpriteID* psid; uint base_offset; TileIndex rampnorth; TileIndex rampsouth; TransportType transport_type; Axis axis; uint piece; BridgeType type; int x; int y; uint z; if (!IsBridgeAbove(ti->tile)) return; rampnorth = GetNorthernBridgeEnd(ti->tile); rampsouth = GetSouthernBridgeEnd(ti->tile); transport_type = GetTunnelBridgeTransportType(rampsouth); axis = GetBridgeAxis(ti->tile); piece = CalcBridgePiece( GetTunnelBridgeLength(ti->tile, rampnorth) + 1, GetTunnelBridgeLength(ti->tile, rampsouth) + 1 ); type = GetBridgeType(rampsouth); if (transport_type == TRANSPORT_RAIL) { base_offset = GetRailTypeInfo(GetRailType(rampsouth))->bridge_offset; } else { base_offset = 8; } psid = base_offset + GetBridgeSpriteTable(type, piece); if (axis != AXIS_X) psid += 4; x = ti->x; y = ti->y; uint bridge_z = GetBridgeHeight(rampsouth); z = bridge_z - BRIDGE_Z_START; /* Add a bounding box, that separates the bridge from things below it. */ AddSortableSpriteToDraw(SPR_EMPTY_BOUNDING_BOX, PAL_NONE, x, y, 16, 16, 1, bridge_z - TILE_HEIGHT + BB_Z_SEPARATOR); /* Draw Trambits as SpriteCombine */ if (transport_type == TRANSPORT_ROAD) StartSpriteCombine(); /* Draw floor and far part of bridge*/ if (!IsInvisibilitySet(TO_BRIDGES)) { if (axis == AXIS_X) { AddSortableSpriteToDraw(psid->sprite, psid->pal, x, y, 16, 1, 0x28, z, IsTransparencySet(TO_BRIDGES), 0, 0, BRIDGE_Z_START); } else { AddSortableSpriteToDraw(psid->sprite, psid->pal, x, y, 1, 16, 0x28, z, IsTransparencySet(TO_BRIDGES), 0, 0, BRIDGE_Z_START); } } psid++; if (transport_type == TRANSPORT_ROAD) { RoadTypes rts = GetRoadTypes(rampsouth); if (HasBit(rts, ROADTYPE_TRAM)) { /* DrawBridgeTramBits() calls EndSpriteCombine() and StartSpriteCombine() */ DrawBridgeTramBits(x, y, bridge_z, axis ^ 1, HasBit(rts, ROADTYPE_ROAD), false); } else { EndSpriteCombine(); StartSpriteCombine(); } } else if (HasCatenary(GetRailType(rampsouth))) { DrawCatenary(ti); } /* draw roof, the component of the bridge which is logically between the vehicle and the camera */ if (!IsInvisibilitySet(TO_BRIDGES)) { if (axis == AXIS_X) { y += 12; if (psid->sprite & SPRITE_MASK) AddSortableSpriteToDraw(psid->sprite, psid->pal, x, y, 16, 4, 0x28, z, IsTransparencySet(TO_BRIDGES), 0, 3, BRIDGE_Z_START); } else { x += 12; if (psid->sprite & SPRITE_MASK) AddSortableSpriteToDraw(psid->sprite, psid->pal, x, y, 4, 16, 0x28, z, IsTransparencySet(TO_BRIDGES), 3, 0, BRIDGE_Z_START); } } /* Draw TramFront as SpriteCombine */ if (transport_type == TRANSPORT_ROAD) EndSpriteCombine(); /* Do not draw anything more if bridges are invisible */ if (IsInvisibilitySet(TO_BRIDGES)) return; psid++; if (ti->z + 5 == z) { /* draw poles below for small bridges */ if (psid->sprite != 0) { SpriteID image = psid->sprite; SpriteID pal = psid->pal; if (IsTransparencySet(TO_BRIDGES)) { SetBit(image, PALETTE_MODIFIER_TRANSPARENT); pal = PALETTE_TO_TRANSPARENT; } DrawGroundSpriteAt(image, pal, x, y, z); } } else if (_patches.bridge_pillars) { /* draw pillars below for high bridges */ DrawBridgePillars(psid, ti, axis, type, x, y, z); } } static uint GetSlopeZ_TunnelBridge(TileIndex tile, uint x, uint y) { uint z; Slope tileh = GetTileSlope(tile, &z); x &= 0xF; y &= 0xF; if (IsTunnel(tile)) { uint pos = (DiagDirToAxis(GetTunnelBridgeDirection(tile)) == AXIS_X ? y : x); /* In the tunnel entrance? */ if (5 <= pos && pos <= 10) return z; } else { // IsBridge(tile) DiagDirection dir = GetTunnelBridgeDirection(tile); uint pos = (DiagDirToAxis(dir) == AXIS_X ? y : x); z += ApplyFoundationToSlope(GetBridgeFoundation(tileh, DiagDirToAxis(dir)), &tileh); /* On the bridge ramp? */ if (5 <= pos && pos <= 10) { uint delta; if (tileh != SLOPE_FLAT) return z + TILE_HEIGHT; switch (dir) { default: NOT_REACHED(); case DIAGDIR_NE: delta = (TILE_SIZE - 1 - x) / 2; break; case DIAGDIR_SE: delta = y / 2; break; case DIAGDIR_SW: delta = x / 2; break; case DIAGDIR_NW: delta = (TILE_SIZE - 1 - y) / 2; break; } return z + 1 + delta; } } return z + GetPartialZ(x, y, tileh); } static Foundation GetFoundation_TunnelBridge(TileIndex tile, Slope tileh) { return IsTunnel(tile) ? FOUNDATION_NONE : GetBridgeFoundation(tileh, DiagDirToAxis(GetTunnelBridgeDirection(tile))); } static void GetAcceptedCargo_TunnelBridge(TileIndex tile, AcceptedCargo ac) { /* not used */ } static void GetTileDesc_TunnelBridge(TileIndex tile, TileDesc *td) { if (IsTunnel(tile)) { td->str = (GetTunnelBridgeTransportType(tile) == TRANSPORT_RAIL) ? STR_5017_RAILROAD_TUNNEL : STR_5018_ROAD_TUNNEL; } else { //so it must be a bridge td->str = GetBridgeSpec(GetBridgeType(tile))->transport_name[GetTunnelBridgeTransportType(tile)]; } td->owner = GetTileOwner(tile); } static void AnimateTile_TunnelBridge(TileIndex tile) { /* not used */ } static void TileLoop_TunnelBridge(TileIndex tile) { bool snow_or_desert = HasTunnelBridgeSnowOrDesert(tile); switch (_opt.landscape) { case LT_ARCTIC: if (snow_or_desert != (GetTileZ(tile) > GetSnowLine())) { SetTunnelBridgeSnowOrDesert(tile, !snow_or_desert); MarkTileDirtyByTile(tile); } break; case LT_TROPIC: if (GetTropicZone(tile) == TROPICZONE_DESERT && !snow_or_desert) { SetTunnelBridgeSnowOrDesert(tile, true); MarkTileDirtyByTile(tile); } break; default: break; } } static void ClickTile_TunnelBridge(TileIndex tile) { /* not used */ } static TrackStatus GetTileTrackStatus_TunnelBridge(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side) { TransportType transport_type = GetTunnelBridgeTransportType(tile); if (transport_type != mode || (transport_type == TRANSPORT_ROAD && (GetRoadTypes(tile) & sub_mode) == 0)) return 0; DiagDirection dir = GetTunnelBridgeDirection(tile); if (side != INVALID_DIAGDIR && side != ReverseDiagDir(dir)) return 0; return CombineTrackStatus(TrackBitsToTrackdirBits(AxisToTrackBits(DiagDirToAxis(dir))), TRACKDIR_BIT_NONE); } static void ChangeTileOwner_TunnelBridge(TileIndex tile, PlayerID old_player, PlayerID new_player) { if (!IsTileOwner(tile, old_player)) return; if (new_player != PLAYER_SPECTATOR) { SetTileOwner(tile, new_player); } else { if (CmdFailed(DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR))) { /* When clearing the bridge/tunnel failed there are still vehicles on/in * the bridge/tunnel. As all *our* vehicles are already removed, they * must be of another owner. Therefor this must be a road bridge/tunnel. * In that case we can safely reassign the ownership to OWNER_NONE. */ assert(GetTunnelBridgeTransportType(tile) == TRANSPORT_ROAD); SetTileOwner(tile, OWNER_NONE); } } } static const byte _tunnel_fractcoord_1[4] = {0x8E, 0x18, 0x81, 0xE8}; static const byte _tunnel_fractcoord_2[4] = {0x81, 0x98, 0x87, 0x38}; static const byte _tunnel_fractcoord_3[4] = {0x82, 0x88, 0x86, 0x48}; static const byte _exit_tunnel_track[4] = {1, 2, 1, 2}; /** Get the trackdir of the exit of a tunnel */ static const Trackdir _road_exit_tunnel_state[DIAGDIR_END] = { TRACKDIR_X_SW, TRACKDIR_Y_NW, TRACKDIR_X_NE, TRACKDIR_Y_SE }; static const byte _road_exit_tunnel_frame[4] = {2, 7, 9, 4}; static const byte _tunnel_fractcoord_4[4] = {0x52, 0x85, 0x98, 0x29}; static const byte _tunnel_fractcoord_5[4] = {0x92, 0x89, 0x58, 0x25}; static const byte _tunnel_fractcoord_6[4] = {0x92, 0x89, 0x56, 0x45}; static const byte _tunnel_fractcoord_7[4] = {0x52, 0x85, 0x96, 0x49}; static VehicleEnterTileStatus VehicleEnter_TunnelBridge(Vehicle *v, TileIndex tile, int x, int y) { int z = GetSlopeZ(x, y) - v->z_pos; if (abs(z) > 2) return VETSB_CANNOT_ENTER; const DiagDirection dir = GetTunnelBridgeDirection(tile); if (IsTunnel(tile)) { byte fc; DiagDirection vdir; if (v->type == VEH_TRAIN) { fc = (x & 0xF) + (y << 4); vdir = DirToDiagDir(v->direction); if (v->u.rail.track != TRACK_BIT_WORMHOLE && dir == vdir) { if (IsFrontEngine(v) && fc == _tunnel_fractcoord_1[dir]) { if (!PlayVehicleSound(v, VSE_TUNNEL) && RailVehInfo(v->engine_type)->engclass == 0) { SndPlayVehicleFx(SND_05_TRAIN_THROUGH_TUNNEL, v); } return VETSB_CONTINUE; } if (fc == _tunnel_fractcoord_2[dir]) { v->tile = tile; v->u.rail.track = TRACK_BIT_WORMHOLE; v->vehstatus |= VS_HIDDEN; return VETSB_ENTERED_WORMHOLE; } } if (dir == ReverseDiagDir(vdir) && fc == _tunnel_fractcoord_3[dir] && z == 0) { /* We're at the tunnel exit ?? */ v->tile = tile; v->u.rail.track = (TrackBits)_exit_tunnel_track[dir]; assert(v->u.rail.track); v->vehstatus &= ~VS_HIDDEN; return VETSB_ENTERED_WORMHOLE; } } else if (v->type == VEH_ROAD) { fc = (x & 0xF) + (y << 4); vdir = DirToDiagDir(v->direction); /* Enter tunnel? */ if (v->u.road.state != RVSB_WORMHOLE && dir == vdir) { if (fc == _tunnel_fractcoord_4[dir] || fc == _tunnel_fractcoord_5[dir]) { v->tile = tile; v->u.road.state = RVSB_WORMHOLE; v->vehstatus |= VS_HIDDEN; return VETSB_ENTERED_WORMHOLE; } else { return VETSB_CONTINUE; } } if (dir == ReverseDiagDir(vdir) && ( /* We're at the tunnel exit ?? */ fc == _tunnel_fractcoord_6[dir] || fc == _tunnel_fractcoord_7[dir] ) && z == 0) { v->tile = tile; v->u.road.state = _road_exit_tunnel_state[dir]; v->u.road.frame = _road_exit_tunnel_frame[dir]; v->vehstatus &= ~VS_HIDDEN; return VETSB_ENTERED_WORMHOLE; } } } else { // IsBridge(tile) if (v->IsPrimaryVehicle()) { /* modify speed of vehicle */ uint16 spd = GetBridgeSpec(GetBridgeType(tile))->speed; if (v->type == VEH_ROAD) spd *= 2; if (v->cur_speed > spd) v->cur_speed = spd; } if (DirToDiagDir(v->direction) == dir) { switch (dir) { default: NOT_REACHED(); case DIAGDIR_NE: if ((x & 0xF) != 0) return VETSB_CONTINUE; break; case DIAGDIR_SE: if ((y & 0xF) != TILE_SIZE - 1) return VETSB_CONTINUE; break; case DIAGDIR_SW: if ((x & 0xF) != TILE_SIZE - 1) return VETSB_CONTINUE; break; case DIAGDIR_NW: if ((y & 0xF) != 0) return VETSB_CONTINUE; break; } if (v->type == VEH_TRAIN) { v->u.rail.track = TRACK_BIT_WORMHOLE; ClrBit(v->u.rail.flags, VRF_GOINGUP); ClrBit(v->u.rail.flags, VRF_GOINGDOWN); } else { v->u.road.state = RVSB_WORMHOLE; } return VETSB_ENTERED_WORMHOLE; } else if (DirToDiagDir(v->direction) == ReverseDiagDir(dir)) { v->tile = tile; if (v->type == VEH_TRAIN) { if (v->u.rail.track == TRACK_BIT_WORMHOLE) { v->u.rail.track = (DiagDirToAxis(dir) == AXIS_X ? TRACK_BIT_X : TRACK_BIT_Y); return VETSB_ENTERED_WORMHOLE; } } else { if (v->u.road.state == RVSB_WORMHOLE) { v->u.road.state = _road_exit_tunnel_state[dir]; v->u.road.frame = 0; return VETSB_ENTERED_WORMHOLE; } } return VETSB_CONTINUE; } } return VETSB_CONTINUE; } static CommandCost TerraformTile_TunnelBridge(TileIndex tile, uint32 flags, uint z_new, Slope tileh_new) { if (_patches.build_on_slopes && AutoslopeEnabled() && IsBridge(tile)) { DiagDirection direction = GetTunnelBridgeDirection(tile); Axis axis = DiagDirToAxis(direction); CommandCost res; uint z_old; Slope tileh_old = GetTileSlope(tile, &z_old); /* Check if new slope is valid for bridges in general (so we can savely call GetBridgeFoundation()) */ if ((direction == DIAGDIR_NW) || (direction == DIAGDIR_NE)) { CheckBridgeSlopeSouth(axis, &tileh_old, &z_old); res = CheckBridgeSlopeSouth(axis, &tileh_new, &z_new); } else { CheckBridgeSlopeNorth(axis, &tileh_old, &z_old); res = CheckBridgeSlopeNorth(axis, &tileh_new, &z_new); } /* Surface slope is valid and remains unchanged? */ if (!CmdFailed(res) && (z_old == z_new) && (tileh_old == tileh_new)) return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform); } return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR); } extern const TileTypeProcs _tile_type_tunnelbridge_procs = { DrawTile_TunnelBridge, /* draw_tile_proc */ GetSlopeZ_TunnelBridge, /* get_slope_z_proc */ ClearTile_TunnelBridge, /* clear_tile_proc */ GetAcceptedCargo_TunnelBridge, /* get_accepted_cargo_proc */ GetTileDesc_TunnelBridge, /* get_tile_desc_proc */ GetTileTrackStatus_TunnelBridge, /* get_tile_track_status_proc */ ClickTile_TunnelBridge, /* click_tile_proc */ AnimateTile_TunnelBridge, /* animate_tile_proc */ TileLoop_TunnelBridge, /* tile_loop_clear */ ChangeTileOwner_TunnelBridge, /* change_tile_owner_clear */ NULL, /* get_produced_cargo_proc */ VehicleEnter_TunnelBridge, /* vehicle_enter_tile_proc */ GetFoundation_TunnelBridge, /* get_foundation_proc */ TerraformTile_TunnelBridge, /* terraform_tile_proc */ };