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/* $Id$ */
/*
* 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 tile_cmd.h Generic 'commands' that can be performed on all tiles. */
#ifndef TILE_CMD_H
#define TILE_CMD_H
#include "command_type.h"
#include "vehicle_type.h"
#include "cargo_type.h"
#include "track_type.h"
#include "tile_map.h"
/** The returned bits of VehicleEnterTile. */
enum VehicleEnterTileStatus {
VETS_ENTERED_STATION = 1, ///< The vehicle entered a station
VETS_ENTERED_WORMHOLE = 2, ///< The vehicle either entered a bridge, tunnel or depot tile (this includes the last tile of the bridge/tunnel)
VETS_CANNOT_ENTER = 3, ///< The vehicle cannot enter the tile
/**
* Shift the VehicleEnterTileStatus this many bits
* to the right to get the station ID when
* VETS_ENTERED_STATION is set
*/
VETS_STATION_ID_OFFSET = 8,
VETS_STATION_MASK = 0xFFFF << VETS_STATION_ID_OFFSET,
/** Bit sets of the above specified bits */
VETSB_CONTINUE = 0, ///< The vehicle can continue normally
VETSB_ENTERED_STATION = 1 << VETS_ENTERED_STATION, ///< The vehicle entered a station
VETSB_ENTERED_WORMHOLE = 1 << VETS_ENTERED_WORMHOLE, ///< The vehicle either entered a bridge, tunnel or depot tile (this includes the last tile of the bridge/tunnel)
VETSB_CANNOT_ENTER = 1 << VETS_CANNOT_ENTER, ///< The vehicle cannot enter the tile
};
DECLARE_ENUM_AS_BIT_SET(VehicleEnterTileStatus);
/** Tile information, used while rendering the tile */
struct TileInfo {
uint x; ///< X position of the tile in unit coordinates
uint y; ///< Y position of the tile in unit coordinates
Slope tileh; ///< Slope of the tile
TileIndex tile; ///< Tile index
uint z; ///< Height
};
/** Tile description for the 'land area information' tool */
struct TileDesc {
StringID str; ///< Description of the tile
Owner owner[4]; ///< Name of the owner(s)
StringID owner_type[4]; ///< Type of each owner
Date build_date; ///< Date of construction of tile contents
StringID station_class; ///< Class of station
StringID station_name; ///< Type of station within the class
const char *grf; ///< newGRF used for the tile contents
uint64 dparam[2]; ///< Parameters of the \a str string
};
/**
* Tile callback function signature for drawing a tile and its contents to the screen
* @param ti Information about the tile to draw
*/
typedef void DrawTileProc(TileInfo *ti);
typedef uint GetSlopeZProc(TileIndex tile, uint x, uint y);
typedef CommandCost ClearTileProc(TileIndex tile, DoCommandFlag flags);
/**
* Tile callback function signature for obtaining cargo acceptance of a tile
* @param tile Tile queried for its accepted cargo
* @param acceptance Storage destination of the cargo acceptance in 1/8
* @param always_accepted Bitmask of always accepted cargo types
*/
typedef void AddAcceptedCargoProc(TileIndex tile, CargoArray &acceptance, uint32 *always_accepted);
/**
* Tile callback function signature for obtaining a tile description
* @param tile Tile being queried
* @param td Storage pointer for returned tile description
*/
typedef void GetTileDescProc(TileIndex tile, TileDesc *td);
/**
* Tile callback function signature for getting the possible tracks
* that can be taken on a given tile by a given transport.
*
* The return value contains the existing trackdirs and signal states.
*
* see track_func.h for usage of TrackStatus.
*
* @param tile the tile to get the track status from
* @param mode the mode of transportation
* @param sub_mode used to differentiate between different kinds within the mode
* @return the track status information
*/
typedef TrackStatus GetTileTrackStatusProc(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side);
/**
* Tile callback function signature for obtaining the produced cargo of a tile.
* @param tile Tile being queried
* @param produced Destination array for produced cargo
*/
typedef void AddProducedCargoProc(TileIndex tile, CargoArray &produced);
typedef bool ClickTileProc(TileIndex tile);
typedef void AnimateTileProc(TileIndex tile);
typedef void TileLoopProc(TileIndex tile);
typedef void ChangeTileOwnerProc(TileIndex tile, Owner old_owner, Owner new_owner);
/** @see VehicleEnterTileStatus to see what the return values mean */
typedef VehicleEnterTileStatus VehicleEnterTileProc(Vehicle *v, TileIndex tile, int x, int y);
typedef Foundation GetFoundationProc(TileIndex tile, Slope tileh);
/**
* Tile callback function signature of the terraforming callback.
*
* The function is called when a tile is affected by a terraforming operation.
* It has to check if terraforming of the tile is allowed and return extra terraform-cost that depend on the tiletype.
* With DC_EXEC in \a flags it has to perform tiletype-specific actions (like clearing land etc., but not the terraforming itself).
*
* @note The terraforming has not yet taken place. So GetTileZ() and GetTileSlope() refer to the landscape before the terraforming operation.
*
* @param tile The involved tile.
* @param flags Command flags passed to the terraform command (DC_EXEC, DC_QUERY_COST, etc.).
* @param z_new TileZ after terraforming.
* @param tileh_new Slope after terraforming.
* @return Error code or extra cost for terraforming (like clearing land, building foundations, etc., but not the terraforming itself.)
*/
typedef CommandCost TerraformTileProc(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new);
/**
* Set of callback functions for performing tile operations of a given tile type.
* @see TileType */
struct TileTypeProcs {
DrawTileProc *draw_tile_proc; ///< Called to render the tile and its contents to the screen
GetSlopeZProc *get_slope_z_proc;
ClearTileProc *clear_tile_proc;
AddAcceptedCargoProc *add_accepted_cargo_proc; ///< Adds accepted cargo of the tile to cargo array supplied as parameter
GetTileDescProc *get_tile_desc_proc; ///< Get a description of a tile (for the 'land area information' tool)
GetTileTrackStatusProc *get_tile_track_status_proc; ///< Get available tracks and status of a tile
ClickTileProc *click_tile_proc; ///< Called when tile is clicked
AnimateTileProc *animate_tile_proc;
TileLoopProc *tile_loop_proc;
ChangeTileOwnerProc *change_tile_owner_proc;
AddProducedCargoProc *add_produced_cargo_proc; ///< Adds produced cargo of the tile to cargo array supplied as parameter
VehicleEnterTileProc *vehicle_enter_tile_proc; ///< Called when a vehicle enters a tile
GetFoundationProc *get_foundation_proc;
TerraformTileProc *terraform_tile_proc; ///< Called when a terraforming operation is about to take place
};
extern const TileTypeProcs * const _tile_type_procs[16];
TrackStatus GetTileTrackStatus(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side = INVALID_DIAGDIR);
VehicleEnterTileStatus VehicleEnterTile(Vehicle *v, TileIndex tile, int x, int y);
void ChangeTileOwner(TileIndex tile, Owner old_owner, Owner new_owner);
void GetTileDesc(TileIndex tile, TileDesc *td);
static inline void AddAcceptedCargo(TileIndex tile, CargoArray &acceptance, uint32 *always_accepted)
{
AddAcceptedCargoProc *proc = _tile_type_procs[GetTileType(tile)]->add_accepted_cargo_proc;
if (proc == NULL) return;
uint32 dummy = 0; // use dummy bitmask so there don't need to be several 'always_accepted != NULL' checks
proc(tile, acceptance, always_accepted == NULL ? &dummy : always_accepted);
}
static inline void AddProducedCargo(TileIndex tile, CargoArray &produced)
{
AddProducedCargoProc *proc = _tile_type_procs[GetTileType(tile)]->add_produced_cargo_proc;
if (proc == NULL) return;
proc(tile, produced);
}
static inline void AnimateTile(TileIndex tile)
{
AnimateTileProc *proc = _tile_type_procs[GetTileType(tile)]->animate_tile_proc;
assert(proc != NULL);
proc(tile);
}
static inline bool ClickTile(TileIndex tile)
{
ClickTileProc *proc = _tile_type_procs[GetTileType(tile)]->click_tile_proc;
if (proc == NULL) return false;
return proc(tile);
}
#endif /* TILE_CMD_H */
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