tile_type.h

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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 <https://www.gnu.org/licenses/old-licenses/gpl-2.0>.
 */
 
#ifndef TILE_TYPE_H
#define TILE_TYPE_H
 
#include "core/strong_typedef_type.hpp"
 
static constexpr uint TILE_SIZE           = 16;                    
static constexpr uint TILE_UNIT_MASK      = TILE_SIZE - 1;         
static constexpr uint TILE_PIXELS         = 32;                    
static constexpr uint TILE_HEIGHT         =  8;                    
 
static constexpr uint MAX_BUILDING_PIXELS = 200;                   
static constexpr int MAX_VEHICLE_PIXEL_X  = 192;                   
static constexpr int MAX_VEHICLE_PIXEL_Y  = 96;                    
 
static constexpr uint MAX_TILE_HEIGHT     = 255;                   
 
static constexpr uint MIN_HEIGHTMAP_HEIGHT = 1;                    
static constexpr uint MIN_CUSTOM_TERRAIN_TYPE = 1;                 
 
static constexpr uint MIN_MAP_HEIGHT_LIMIT = 15;                   
static constexpr uint MAX_MAP_HEIGHT_LIMIT = MAX_TILE_HEIGHT;      
 
static constexpr uint MIN_SNOWLINE_HEIGHT = 2;                     
static constexpr uint DEF_SNOWLINE_HEIGHT = 10;                    
static constexpr uint MAX_SNOWLINE_HEIGHT = (MAX_TILE_HEIGHT - 2); 
 
static constexpr uint DEF_SNOW_COVERAGE = 40;                      
static constexpr uint DEF_DESERT_COVERAGE = 50;                    
 
static constexpr size_t TILE_TYPE_BITS = 4; 
 
enum class TileType : uint8_t {
  Clear, 
  Railway, 
  Road, 
  House, 
  Trees, 
  Station, 
  Water, 
  Void, 
  Industry, 
  TunnelBridge, 
  Object, 
  End, 
  MaxSize = 1U << TILE_TYPE_BITS, 
};
 
static_assert(TileType::End <= TileType::MaxSize);
 
enum TropicZone : uint8_t {
  TROPICZONE_NORMAL     = 0,      
  TROPICZONE_DESERT     = 1,      
  TROPICZONE_RAINFOREST = 2,      
};
 
using TileIndex = StrongType::Typedef<uint32_t, struct TileIndexTag, StrongType::Compare, StrongType::Integer, StrongType::Compatible<int32_t>, StrongType::Compatible<int64_t>>;
 
/* Make sure the size is as expected. */
static_assert(sizeof(TileIndex) == 4);
 
inline constexpr TileIndex INVALID_TILE = TileIndex{ (uint32_t)-1 };
 
#endif /* TILE_TYPE_H */