# unmovable_cmd.cpp File Reference

Handling of unmovable tiles. More...

`#include "stdafx.h"`
`#include "openttd.h"`
`#include "landscape.h"`
`#include "command_func.h"`
`#include "viewport_func.h"`
`#include "company_base.h"`
`#include "town.h"`
`#include "sprite.h"`
`#include "bridge_map.h"`
`#include "unmovable_map.h"`
`#include "genworld.h"`
`#include "autoslope.h"`
`#include "transparency.h"`
`#include "functions.h"`
`#include "window_func.h"`
`#include "vehicle_func.h"`
`#include "company_gui.h"`
`#include "economy_func.h"`
`#include "cheat_type.h"`
`#include "landscape_type.h"`
`#include "unmovable.h"`
`#include "table/strings.h"`
`#include "table/sprites.h"`
`#include "table/unmovable_land.h"`

Go to the source code of this file.

## Functions
static const UnmovableSpec * | GetUnmovableSpec (UnmovableType type)
| Accessor for array _original_unmovable.
static CommandCost | DestroyCompanyHQ (CompanyID cid, DoCommandFlag flags)
| Destroy a HQ.
void | UpdateCompanyHQ (Company *c, uint score)
CommandCost | CheckFlatLandBelow (TileIndex tile, uint w, uint h, DoCommandFlag flags, uint invalid_dirs, StationID *station, bool check_clear=true)
| Tries to clear the given area.
CommandCost | CmdBuildCompanyHQ (TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
| Build or relocate the HQ.
CommandCost | CmdPurchaseLandArea (TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
| Purchase a land area.
CommandCost | CmdSellLandArea (TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
| Sell a land area.
static Foundation | GetFoundation_Unmovable (TileIndex tile, Slope tileh)
static void | DrawTile_Unmovable (TileInfo *ti)
static uint | GetSlopeZ_Unmovable (TileIndex tile, uint x, uint y)
static CommandCost | ClearTile_Unmovable (TileIndex tile, DoCommandFlag flags)
static void | GetAcceptedCargo_Unmovable (TileIndex tile, AcceptedCargo ac)
static void | GetTileDesc_Unmovable (TileIndex tile, TileDesc *td)
static void | AnimateTile_Unmovable (TileIndex tile)
static void | TileLoop_Unmovable (TileIndex tile)
static TrackStatus | GetTileTrackStatus_Unmovable (TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
static bool | ClickTile_Unmovable (TileIndex tile)
static bool | IsRadioTowerNearby (TileIndex tile)
void | GenerateUnmovables ()
static void | ChangeTileOwner_Unmovable (TileIndex tile, Owner old_owner, Owner new_owner)
static CommandCost | TerraformTile_Unmovable (TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
## Variables
const TileTypeProcs | _tile_type_unmovable_procs

## Detailed Description

Handling of unmovable tiles.

Definition in file unmovable_cmd.cpp.

## Function Documentation

CommandCost CheckFlatLandBelow | ( | TileIndex | tile,
|  | uint | w,
|  | uint | h,
|  | DoCommandFlag | flags,
|  | uint | invalid_dirs,
|  | StationID * | station,
|  | bool | check_clear = `true` |
| ) |  |  |

Tries to clear the given area.

Parameters:

  | tile | TileIndex to start check
  | w | width of search area
  | h | height of search area
  | flags | operation to perform
  | invalid_dirs | prohibited directions (set of DiagDirections)
  | station | StationID to be queried and returned if available
  | check_clear | if clearing tile should be performed (in wich case, cost will be added)

Returns:
  the cost in case of success, or an error code if it failed.

Definition at line 666 of file station_cmd.cpp.

References _settings_game, CommandCost::AddCost(), BEGIN_TILE_LOOP, ConstructionSettings::build_on_slopes, CMD_ERROR, CMD_LANDSCAPE_CLEAR, CmdFailed(), GameSettings::construction, DC_AUTO, DIAGDIR_NE, DIAGDIR_NW, DIAGDIR_SE, DIAGDIR_SW, DoCommand(), END_TILE_LOOP, GetStationIndex(), GetTileSlope(), HasBit(), IsBridgeAbove(), IsSteepSlope(), IsTileType(), MayHaveBridgeAbove(), return_cmd_error, SLOPE_FLAT, SLOPE_NE, SLOPE_NW, SLOPE_SE, SLOPE_SW, and TILE_HEIGHT.

Referenced by CmdBuildAirport(), CmdBuildCompanyHQ(), CmdBuildRailroadStation(), and CmdBuildRoadStop().

CommandCost CmdBuildCompanyHQ | ( | TileIndex | tile,
|  | DoCommandFlag | flags,
|  | uint32 | p1,
|  | uint32 | p2,
|  | const char * | text |
| ) |  |  |

Build or relocate the HQ.

This depends if the HQ is already built or not

Parameters:

  | tile | tile where the HQ will be built or relocated to
  | flags | type of operation
  | p1 | unused
  | p2 | unused

Definition at line 100 of file unmovable_cmd.cpp.

References CommandCost::AddCost(), CheckFlatLandBelow(), CmdFailed(), DC_EXEC, DestroyCompanyHQ(), INVALID_TILE, InvalidateWindow(), MakeCompanyHQ(), and UpdateCompanyRatingAndValue().

CommandCost CmdPurchaseLandArea | ( | TileIndex | tile,
|  | DoCommandFlag | flags,
|  | uint32 | p1,
|  | uint32 | p2,
|  | const char * | text |
| ) |  |  |

Purchase a land area.

Actually you only purchase one tile, so the name is a bit confusing ;p

Parameters:

  | tile | the tile the company is purchasing
  | flags | for this command type
  | p1 | unused
  | p2 | unused

Returns:
  error of cost of operation

Definition at line 134 of file unmovable_cmd.cpp.

References CommandCost::AddCost(), CMD_ERROR, CMD_LANDSCAPE_CLEAR, CmdFailed(), DC_EXEC, DoCommand(), GetUnmovableSpec(), IsOwnedLandTile(), IsTileOwner(), MakeOwnedLand(), MarkTileDirtyByTile(), return_cmd_error, and UNMOVABLE_OWNED_LAND.

CommandCost CmdSellLandArea | ( | TileIndex | tile,
|  | DoCommandFlag | flags,
|  | uint32 | p1,
|  | uint32 | p2,
|  | const char * | text |
| ) |  |  |

Sell a land area.

Actually you only sell one tile, so the name is a bit confusing ;p

Parameters:

  | tile | the tile the company is selling
  | flags | for this command type
  | p1 | unused
  | p2 | unused

Returns:
  error or cost of operation

Definition at line 161 of file unmovable_cmd.cpp.

References CMD_ERROR, DC_EXEC, GetUnmovableSpec(), IsOwnedLandTile(), OWNER_WATER, and UNMOVABLE_OWNED_LAND.

static CommandCost DestroyCompanyHQ | ( | CompanyID | cid,
|  | DoCommandFlag | flags |
| ) |  |  | `[static]`

Destroy a HQ.

During normal gameplay you can only implicitely destroy a HQ when you are rebuilding it. Otherwise, only water can destroy it.

Parameters:

  | cid | Company requesting the destruction of his HQ
  | flags | docommand flags of calling function

Returns:
  cost of the operation

Definition at line 52 of file unmovable_cmd.cpp.

References DC_EXEC, INVALID_TILE, InvalidateWindow(), and TileDiffXY().

Referenced by CmdBuildCompanyHQ().

static const UnmovableSpec* GetUnmovableSpec | ( | UnmovableType | type | ) | `[inline, static]`

Accessor for array _original_unmovable.

This will ensure at once : proper access and not allowing modifications of it.

Parameters:

  | type | of unmovable (which is the index in _original_unmovable)

Precondition:
  type < UNMOVABLE_MAX

Returns:
  a pointer to the corresponding unmovable spec

Definition at line 39 of file unmovable_cmd.cpp.

Referenced by CmdPurchaseLandArea(), and CmdSellLandArea().

## Variable Documentation

const TileTypeProcs _tile_type_unmovable_procs

Initial value:

     {
      DrawTile_Unmovable,
      GetSlopeZ_Unmovable,
      ClearTile_Unmovable,
      GetAcceptedCargo_Unmovable,
      GetTileDesc_Unmovable,
      GetTileTrackStatus_Unmovable,
      ClickTile_Unmovable,
      AnimateTile_Unmovable,
      TileLoop_Unmovable,
      ChangeTileOwner_Unmovable,
      NULL,
      NULL,
      GetFoundation_Unmovable,
      TerraformTile_Unmovable,
    }