src/water.h

   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 water.h Functions related to water (management) */
   9
  10 #ifndef WATER_H
  11 #define WATER_H
  12
  13 #include "water_map.h"
  14 #include "economy_func.h"
  15
  16 /**
  17  * Describes the behaviour of a tile during flooding.
  18  */
  19 enum FloodingBehaviour {
  20         FLOOD_NONE,    ///< The tile does not flood neighboured tiles.
  21         FLOOD_ACTIVE,  ///< The tile floods neighboured tiles.
  22         FLOOD_PASSIVE, ///< The tile does not actively flood neighboured tiles, but it prevents them from drying up.
  23         FLOOD_DRYUP,   ///< The tile drys up if it is not constantly flooded from neighboured tiles.
  24 };
  25
  26 FloodingBehaviour GetFloodingBehaviour(TileIndex tile);
  27 void ClearNeighbourNonFloodingStates(TileIndex tile);
  28
  29 void TileLoop_Water(TileIndex tile);
  30 bool FloodHalftile(TileIndex t);
  31
  32 void ConvertGroundTilesIntoWaterTiles();
  33
  34 void DrawShipDepotSprite(int x, int y, Axis axis, DepotPart part);
  35 void DrawWaterClassGround(const struct TileInfo *ti);
  36 void DrawShoreTile(Slope tileh);
  37
  38 void MakeWaterKeepingClass(TileIndex tile, Owner o);
  39 void CheckForDockingTile(TileIndex t);
  40
  41 void MakeRiverAndModifyDesertZoneAround(TileIndex tile);
  42 static const uint RIVER_OFFSET_DESERT_DISTANCE = 5; ///< Circular tile search radius to create non-desert around a river tile.
  43
  44 bool IsWateredTile(TileIndex tile, Direction from);
  45
  46 /**
  47  * Calculates the maintenance cost of a number of canal tiles.
  48  * @param num Number of canal tiles.
  49  * @return Total cost.
  50  */
  51 inline Money CanalMaintenanceCost(uint32_t num)
  52 {
  53         return (_price[PR_INFRASTRUCTURE_WATER] * num * (1 + IntSqrt(num))) >> 6; // 6 bits scaling.
  54 }
  55
  56 #endif /* WATER_H */