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Location: cpp/openttd-patchpack/source/src/road_type.h - annotation

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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 <http://www.gnu.org/licenses/>.
 */

/** @file road_type.h Enums and other types related to roads. */

#ifndef ROAD_TYPE_H
#define ROAD_TYPE_H

#include "core/enum_type.hpp"

typedef uint32 RoadTypeLabel;

/**
 * The different roadtypes we support
 *
 * @note currently only ROADTYPE_ROAD and ROADTYPE_TRAM are supported.
 */
enum RoadType : byte {
	ROADTYPE_BEGIN   = 0,    ///< Used for iterations
	ROADTYPE_ROAD    = 0,    ///< Basic road type
	ROADTYPE_TRAM    = 1,    ///< Trams
	ROADTYPE_END     = 63,   ///< Used for iterations
	INVALID_ROADTYPE = 63,   ///< flag for invalid roadtype
};
DECLARE_POSTFIX_INCREMENT(RoadType)
template <> struct EnumPropsT<RoadType> : MakeEnumPropsT<RoadType, byte, ROADTYPE_BEGIN, ROADTYPE_END, INVALID_ROADTYPE, 6> {};

/**
 * The different roadtypes we support, but then a bitmask of them.
 * @note Must be treated as a uint64 type, narrowing it causes bit membership tests to give wrong results.
 */
enum RoadTypes : uint64 {
	ROADTYPES_NONE     = 0,                                ///< No roadtypes
	ROADTYPES_ROAD     = 1 << ROADTYPE_ROAD,               ///< Road
	ROADTYPES_TRAM     = 1 << ROADTYPE_TRAM,               ///< Trams
	INVALID_ROADTYPES  = UINT64_MAX,                       ///< Invalid roadtypes
};
DECLARE_ENUM_AS_BIT_SET(RoadTypes)

/**
 * Enumeration for the road parts on a tile.
 *
 * This enumeration defines the possible road parts which
 * can be build on a tile.
 */
enum RoadBits : byte {
	ROAD_NONE = 0U,                  ///< No road-part is build
	ROAD_NW   = 1U,                  ///< North-west part
	ROAD_SW   = 2U,                  ///< South-west part
	ROAD_SE   = 4U,                  ///< South-east part
	ROAD_NE   = 8U,                  ///< North-east part
	ROAD_X    = ROAD_SW | ROAD_NE,   ///< Full road along the x-axis (south-west + north-east)
	ROAD_Y    = ROAD_NW | ROAD_SE,   ///< Full road along the y-axis (north-west + south-east)

	ROAD_N    = ROAD_NE | ROAD_NW,   ///< Road at the two northern edges
	ROAD_E    = ROAD_NE | ROAD_SE,   ///< Road at the two eastern edges
	ROAD_S    = ROAD_SE | ROAD_SW,   ///< Road at the two southern edges
	ROAD_W    = ROAD_NW | ROAD_SW,   ///< Road at the two western edges

	ROAD_ALL  = ROAD_X  | ROAD_Y,    ///< Full 4-way crossing

	ROAD_END  = ROAD_ALL + 1,        ///< Out-of-range roadbits, used for iterations
};
DECLARE_ENUM_AS_BIT_SET(RoadBits)
template <> struct EnumPropsT<RoadBits> : MakeEnumPropsT<RoadBits, byte, ROAD_NONE, ROAD_END, ROAD_NONE, 4> {};

/** Which directions are disallowed ? */
enum DisallowedRoadDirections : byte {
	DRD_NONE,       ///< None of the directions are disallowed
	DRD_SOUTHBOUND, ///< All southbound traffic is disallowed
	DRD_NORTHBOUND, ///< All northbound traffic is disallowed
	DRD_BOTH,       ///< All directions are disallowed
	DRD_END,        ///< Sentinel
};
DECLARE_ENUM_AS_BIT_SET(DisallowedRoadDirections)
/** Helper information for extract tool. */
template <> struct EnumPropsT<DisallowedRoadDirections> : MakeEnumPropsT<DisallowedRoadDirections, byte, DRD_NONE, DRD_END, DRD_END, 2> {};

#endif /* ROAD_TYPE_H */