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Patric Stout

Remove: ENABLE_NETWORK switch

This switch has been a pain for years. Often disabling broke
compilation, as no developer compiles OpenTTD without, neither do
any of our official binaries.

Additionaly, it has grown so hugely in our codebase, that it
clearly shows that the current solution was a poor one. 350+
instances of "#ifdef ENABLE_NETWORK" were in the code, of which
only ~30 in the networking code itself. The rest were all around
the code to do the right thing, from GUI to NewGRF.

A more proper solution would be to stub all the functions, and
make sure the rest of the code can simply assume network is
available. This was also partially done, and most variables were
correct if networking was disabled. Despite that, often the #ifdefs
were still used.

With the recent removal of DOS, there is also no platform anymore
which we support where networking isn't working out-of-the-box.

All in all, it is time to remove the ENABLE_NETWORK switch. No
replacement is planned, but if you feel we really need this option,
we welcome any Pull Request which implements this in a way that
doesn't crawl through the code like this diff shows we used to.

/* $Id$ */

/*
 * 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_type.h Types related to tiles. */

#ifndef TILE_TYPE_H
#define TILE_TYPE_H

static const uint TILE_SIZE           = 16;                    ///< Tile size in world coordinates.
static const uint TILE_UNIT_MASK      = TILE_SIZE - 1;         ///< For masking in/out the inner-tile world coordinate units.
static const uint TILE_PIXELS         = 32;                    ///< Pixel distance between tile columns/rows in #ZOOM_LVL_BASE.
static const uint TILE_HEIGHT         =  8;                    ///< Height of a height level in world coordinate AND in pixels in #ZOOM_LVL_BASE.

static const uint MAX_BUILDING_PIXELS = 200;                   ///< Maximum height of a building in pixels in #ZOOM_LVL_BASE. (Also applies to "bridge buildings" on the bridge floor.)
static const int MAX_VEHICLE_PIXEL_X  = 192;                   ///< Maximum width of a vehicle in pixels in #ZOOM_LVL_BASE.
static const int MAX_VEHICLE_PIXEL_Y  = 96;                    ///< Maximum height of a vehicle in pixels in #ZOOM_LVL_BASE.

static const uint MAX_TILE_HEIGHT     = 255;                   ///< Maximum allowed tile height

static const uint MIN_MAX_HEIGHTLEVEL = 15;                    ///< Lower bound of maximum allowed heightlevel (in the construction settings)
static const uint DEF_MAX_HEIGHTLEVEL = 30;                    ///< Default maximum allowed heightlevel (in the construction settings)
static const uint MAX_MAX_HEIGHTLEVEL = MAX_TILE_HEIGHT;       ///< Upper bound of maximum allowed heightlevel (in the construction settings)

static const uint MIN_SNOWLINE_HEIGHT = 2;                     ///< Minimum snowline height
static const uint DEF_SNOWLINE_HEIGHT = 15;                    ///< Default snowline height
static const uint MAX_SNOWLINE_HEIGHT = (MAX_TILE_HEIGHT - 2); ///< Maximum allowed snowline height


/**
 * The different types of tiles.
 *
 * Each tile belongs to one type, according whatever is build on it.
 *
 * @note A railway with a crossing street is marked as MP_ROAD.
 */
enum TileType {
	MP_CLEAR,               ///< A tile without any structures, i.e. grass, rocks, farm fields etc.
	MP_RAILWAY,             ///< A railway
	MP_ROAD,                ///< A tile with road (or tram tracks)
	MP_HOUSE,               ///< A house by a town
	MP_TREES,               ///< Tile got trees
	MP_STATION,             ///< A tile of a station
	MP_WATER,               ///< Water tile
	MP_VOID,                ///< Invisible tiles at the SW and SE border
	MP_INDUSTRY,            ///< Part of an industry
	MP_TUNNELBRIDGE,        ///< Tunnel entry/exit and bridge heads
	MP_OBJECT,              ///< Contains objects such as transmitters and owned land
};

/**
 * Additional infos of a tile on a tropic game.
 *
 * The tropiczone is not modified during gameplay. It mainly affects tree growth. (desert tiles are visible though)
 *
 * In randomly generated maps:
 *  TROPICZONE_DESERT: Generated everywhere, if there is neither water nor mountains (TileHeight >= 4) in a certain distance from the tile.
 *  TROPICZONE_RAINFOREST: Generated everywhere, if there is no desert in a certain distance from the tile.
 *  TROPICZONE_NORMAL: Everywhere else, i.e. between desert and rainforest and on sea (if you clear the water).
 *
 * In scenarios:
 *  TROPICZONE_NORMAL: Default value.
 *  TROPICZONE_DESERT: Placed manually.
 *  TROPICZONE_RAINFOREST: Placed if you plant certain rainforest-trees.
 */
enum TropicZone {
	TROPICZONE_NORMAL     = 0,      ///< Normal tropiczone
	TROPICZONE_DESERT     = 1,      ///< Tile is desert
	TROPICZONE_RAINFOREST = 2,      ///< Rainforest tile
};

/**
 * The index/ID of a Tile.
 */
typedef uint32 TileIndex;

/**
 * The very nice invalid tile marker
 */
static const TileIndex INVALID_TILE = (TileIndex)-1;

#endif /* TILE_TYPE_H */