/* $Id$ */ /* * 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 bridge.h Header file for bridges */ #ifndef BRIDGE_H #define BRIDGE_H #include "gfx_type.h" #include "tile_cmd.h" /** * This enum is related to the definition of bridge pieces, * which is used to determine the proper sprite table to use * while drawing a given bridge part. */ enum BridgePieces { BRIDGE_PIECE_NORTH = 0, BRIDGE_PIECE_SOUTH, BRIDGE_PIECE_INNER_NORTH, BRIDGE_PIECE_INNER_SOUTH, BRIDGE_PIECE_MIDDLE_ODD, BRIDGE_PIECE_MIDDLE_EVEN, BRIDGE_PIECE_HEAD, BRIDGE_PIECE_INVALID, }; DECLARE_POSTFIX_INCREMENT(BridgePieces) static const uint MAX_BRIDGES = 13; typedef uint BridgeType; /** * Struct containing information about a single bridge type */ struct BridgeSpec { Year avail_year; ///< the year where it becomes available byte min_length; ///< the minimum length (not counting start and end tile) byte max_length; ///< the maximum length (not counting start and end tile) uint16 price; ///< the price multiplier uint16 speed; ///< maximum travel speed (1 unit = 1/1.6 mph = 1 km-ish/h) SpriteID sprite; ///< the sprite which is used in the GUI PaletteID pal; ///< the palette which is used in the GUI StringID material; ///< the string that contains the bridge description StringID transport_name[2]; ///< description of the bridge, when built for road or rail PalSpriteID **sprite_table; ///< table of sprites for drawing the bridge byte flags; ///< bit 0 set: disable drawing of far pillars. }; extern BridgeSpec _bridge[MAX_BRIDGES]; Foundation GetBridgeFoundation(Slope tileh, Axis axis); bool HasBridgeFlatRamp(Slope tileh, Axis axis); static inline const BridgeSpec *GetBridgeSpec(BridgeType i) { assert(i < lengthof(_bridge)); return &_bridge[i]; } void DrawBridgeMiddle(const TileInfo *ti); CommandCost CheckBridgeAvailability(BridgeType bridge_type, uint bridge_len, DoCommandFlag flags = DC_NONE); int CalcBridgeLenCostFactor(int x); void ResetBridges(); #endif /* BRIDGE_H */