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/*
* 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; ///< Maximal number of available bridge specs.
typedef uint BridgeType; ///< Bridge spec number.
/**
* 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)
uint16 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);
/**
* Get the specification of a bridge type.
* @param i The type of bridge to get the specification for.
* @return The specification.
*/
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 */
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