#include "road_type.h"

#include "road_func.h"

#include "road_internal.h"

#include "road_internal.h"

/* $Id$ */

/** @file road_func.h Functions related to roads. */

#ifndef ROAD_FUNC_H

#define ROAD_FUNC_H

#include "road_type.h"

/**

 * Whether the given roadtype is valid.

 * @param rt the roadtype to check for validness

 * @return true if and only if valid

 */

static inline bool IsValidRoadType(RoadType rt)

{

	return rt == ROADTYPE_ROAD || rt == ROADTYPE_TRAM;

}

/**

 * Are the given bits pointing to valid roadtypes?

 * @param rts the roadtypes to check for validness

 * @return true if and only if valid

 */

static inline bool AreValidRoadTypes(RoadTypes rts)

{

	return HasBit(rts, ROADTYPE_ROAD) || HasBit(rts, ROADTYPE_TRAM);

}

/**

 * Maps a RoadType to the corresponding RoadTypes value

 *

 * @param rt the roadtype to get the roadtypes from

 * @return the roadtypes with the given roadtype

 */

static inline RoadTypes RoadTypeToRoadTypes(RoadType rt)

{

	return (RoadTypes)(1 << rt);

}

/**

 * Returns the RoadTypes which are not present in the given RoadTypes

 *

 * This function returns the complement of a given RoadTypes.

 *

 * @param r The given RoadTypes

 * @return The complement of the given RoadTypes

 * @note The unused value ROADTYPES_HWAY will be used, too.

 */

static inline RoadTypes ComplementRoadTypes(RoadTypes r)

{

	return (RoadTypes)(ROADTYPES_ALL ^ r);

}

/**

 * Calculate the complement of a RoadBits value

 *

 * Simply flips all bits in the RoadBits value to get the complement

 * of the RoadBits.

 *

 * @param r The given RoadBits value

 * @return the complement

 */

static inline RoadBits ComplementRoadBits(RoadBits r)

{

	return (RoadBits)(ROAD_ALL ^ r);

}

/**

 * Calculate the mirrored RoadBits

 *

 * Simply move the bits to their new position.

 *

 * @param r The given RoadBits value

 * @return the mirrored

 */

static inline RoadBits MirrorRoadBits(RoadBits r)

{

	return (RoadBits)(GB(r, 0, 2) << 2 | GB(r, 2, 2));

}

/**

 * Calculate rotated RoadBits

 *

 * Move the Roadbits clockwise til they are in their final position.

 *

 * @param r The given RoadBits value

 * @param rot The given Rotation angle

 * @return the rotated

 */

static inline RoadBits RotateRoadBits(RoadBits r, DiagDirDiff rot)

{

	for (; rot > (DiagDirDiff)0; rot--){

		r = (RoadBits)(GB(r, 0, 1) << 3 | GB(r, 1, 3));

	}

	return r;

}

/**

 * Create the road-part which belongs to the given DiagDirection

 *

 * This function returns a RoadBits value which belongs to

 * the given DiagDirection.

 *

 * @param d The DiagDirection

 * @return The result RoadBits which the selected road-part set

 */

static inline RoadBits DiagDirToRoadBits(DiagDirection d)

{

	return (RoadBits)(ROAD_NW << (3 ^ d));

}

#endif /* ROAD_FUNC_H */

/* $Id$ */

/** @file road_internal.h Functions used internally by the roads. */

#ifndef ROAD_INTERNAL_H

#define ROAD_INTERNAL_H

/**

 * Clean up unneccesary RoadBits of a planed tile.

 * @param tile current tile

 * @param org_rb planed RoadBits

 * @return optimised RoadBits

 */

RoadBits CleanUpRoadBits(const TileIndex tile, RoadBits org_rb);

/**

 * Is it allowed to remove the given road bits from the given tile?

 * @param tile      the tile to remove the road from

 * @param remove    the roadbits that are going to be removed

 * @param owner     the actual owner of the roadbits of the tile

 * @param edge_road are the removed bits from a town?

 * @param rt        the road type to remove the bits from

 * @return true when it is allowed to remove the road bits

 */

bool CheckAllowRemoveRoad(TileIndex tile, RoadBits remove, Owner owner, bool *edge_road, RoadType rt);

/**

 * Draw the catenary for tram road bits

 * @param ti   information about the tile (position, slope)

 * @param tram the roadbits to draw the catenary for

 */

void DrawTramCatenary(TileInfo *ti, RoadBits tram);

#endif /* ROAD_INTERNAL_H */

#include "road_func.h"

/**

 * Return if the tile is a valid tile for a crossing.

 *

 * @note function is overloaded

 * @param tile the curent tile

 * @param ax the axis of the road over the rail

 * @return true if it is a valid tile

 */

bool IsPossibleCrossing(const TileIndex tile, Axis ax);

/* $Id$ */

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

#ifndef ROAD_TYPE_H

#define ROAD_TYPE_H

#include "core/enum_type.hpp"

/**

 * The different roadtypes we support

 *

 * @note currently only ROADTYPE_ROAD and ROADTYPE_TRAM are supported.

 */

enum RoadType {

	ROADTYPE_ROAD = 0,      ///< Basic road type

	ROADTYPE_TRAM = 1,      ///< Trams

	ROADTYPE_HWAY = 2,      ///< Only a placeholder. Not sure what we are going to do with this road type.

	ROADTYPE_END,           ///< Used for iterations

	INVALID_ROADTYPE = 0xFF ///< flag for invalid roadtype

};

DECLARE_POSTFIX_INCREMENT(RoadType);

/**

 * The different roadtypes we support, but then a bitmask of them

 * @note currently only roadtypes with ROADTYPE_ROAD and ROADTYPE_TRAM are supported.

 */

enum RoadTypes {

	ROADTYPES_NONE     = 0,                                                 ///< No roadtypes

	ROADTYPES_ROAD     = 1 << ROADTYPE_ROAD,                                ///< Road

	ROADTYPES_TRAM     = 1 << ROADTYPE_TRAM,                                ///< Trams

	ROADTYPES_HWAY     = 1 << ROADTYPE_HWAY,                                ///< Highway (or whatever substitute)

	ROADTYPES_ROADTRAM = ROADTYPES_ROAD | ROADTYPES_TRAM,                   ///< Road + trams

	ROADTYPES_ROADHWAY = ROADTYPES_ROAD | ROADTYPES_HWAY,                   ///< Road + highway (or whatever substitute)

	ROADTYPES_TRAMHWAY = ROADTYPES_TRAM | ROADTYPES_HWAY,                   ///< Trams + highway (or whatever substitute)

	ROADTYPES_ALL      = ROADTYPES_ROAD | ROADTYPES_TRAM | ROADTYPES_HWAY,  ///< Road + trams + highway (or whatever substitute)

};

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 {

	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_ALL  = ROAD_X  | ROAD_Y     ///< Full 4-way crossing

};

DECLARE_ENUM_AS_BIT_SET(RoadBits);

#endif /* ROAD_TYPE_H */

#include "road_type.h"

#include "road_type.h"

#include "road_internal.h" /* For drawing catenary/checking road removal */

#include "road_internal.h" /* Cleaning up road bits */

/**

 * Checks whether the trackdir means that we are reversing.

 * @param dir the trackdir to check

 * @return true if it is a reversing road trackdir

 */

static inline bool IsReversingRoadTrackdir(Trackdir dir)

{

	return (dir & 0x07) >= 6;

}

/**

 * Checks whether the given trackdir is a straight road

 * @param dir the trackdir to check

 * @return true if it is a straight road trackdir

 */

static inline bool IsStraightRoadTrackdir(Trackdir dir)

{

	return (dir & 0x06) == 0;

}

#include "rail_type.h"

#include "road_type.h"

#include "track_type.h"

#include "rail_type.h"

#include "road_type.h"

#include "rail_type.h"

#include "road_type.h"