src/void_cmd.cpp

   1 /*
   2  * This file is part of OpenTTD.
   3  * 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.
   4  * 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.
   5  * 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/>.
   6  */
   7
   8 /** @file void_cmd.cpp Handling of void tiles. */
   9
  10 #include "stdafx.h"
  11 #include "landscape.h"
  12 #include "command_func.h"
  13 #include "viewport_func.h"
  14 #include "slope_func.h"
  15 #include "water.h"
  16
  17 #include "table/strings.h"
  18 #include "table/sprites.h"
  19
  20 #include "safeguards.h"
  21
  22 static void DrawTile_Void(TileInfo *ti)
  23 {
  24         DrawGroundSprite(SPR_FLAT_BARE_LAND + SlopeToSpriteOffset(ti->tileh), PALETTE_ALL_BLACK);
  25 }
  26
  27
  28 static int GetSlopePixelZ_Void(TileIndex, uint x, uint y, bool)
  29 {
  30         /* This function may be called on tiles outside the map, don't assume
  31          * that 'tile' is a valid tile index. See GetSlopePixelZOutsideMap. */
  32         auto [tileh, z] = GetTilePixelSlopeOutsideMap(x >> 4, y >> 4);
  33
  34         return z + GetPartialPixelZ(x & 0xF, y & 0xF, tileh);
  35 }
  36
  37 static Foundation GetFoundation_Void(TileIndex, Slope)
  38 {
  39         return FOUNDATION_NONE;
  40 }
  41
  42 static CommandCost ClearTile_Void(TileIndex, DoCommandFlag)
  43 {
  44         return_cmd_error(STR_ERROR_OFF_EDGE_OF_MAP);
  45 }
  46
  47
  48 static void GetTileDesc_Void(TileIndex, TileDesc *td)
  49 {
  50         td->str = STR_EMPTY;
  51         td->owner[0] = OWNER_NONE;
  52 }
  53
  54 static void TileLoop_Void(TileIndex tile)
  55 {
  56         /* Floods adjacent edge tile to prevent maps without water. */
  57         TileLoop_Water(tile);
  58 }
  59
  60 static void ChangeTileOwner_Void(TileIndex, Owner, Owner)
  61 {
  62         /* not used */
  63 }
  64
  65 static TrackStatus GetTileTrackStatus_Void(TileIndex, TransportType, uint, DiagDirection)
  66 {
  67         return 0;
  68 }
  69
  70 static CommandCost TerraformTile_Void(TileIndex, DoCommandFlag, int, Slope)
  71 {
  72         return_cmd_error(STR_ERROR_OFF_EDGE_OF_MAP);
  73 }
  74
  75 extern const TileTypeProcs _tile_type_void_procs = {
  76         DrawTile_Void,            // draw_tile_proc
  77         GetSlopePixelZ_Void,      // get_slope_z_proc
  78         ClearTile_Void,           // clear_tile_proc
  79         nullptr,                     // add_accepted_cargo_proc
  80         GetTileDesc_Void,         // get_tile_desc_proc
  81         GetTileTrackStatus_Void,  // get_tile_track_status_proc
  82         nullptr,                     // click_tile_proc
  83         nullptr,                     // animate_tile_proc
  84         TileLoop_Void,            // tile_loop_proc
  85         ChangeTileOwner_Void,     // change_tile_owner_proc
  86         nullptr,                     // add_produced_cargo_proc
  87         nullptr,                     // vehicle_enter_tile_proc
  88         GetFoundation_Void,       // get_foundation_proc
  89         TerraformTile_Void,       // terraform_tile_proc
  90 };