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