tron@3069: /* $Id$ */
tron@3069: 
tron@3145: #ifndef ROAD_MAP_H
tron@3145: #define ROAD_MAP_H
tron@3069: 
tron@3069: #include "macros.h"
tron@3099: #include "rail.h"
tron@3099: #include "tile.h"
tron@3069: 
tron@3069: typedef enum RoadBits {
tron@3069: 	ROAD_NW  = 1,
tron@3069: 	ROAD_SW  = 2,
tron@3069: 	ROAD_SE  = 4,
tron@3069: 	ROAD_NE  = 8,
tron@3069: 	ROAD_X   = ROAD_SW | ROAD_NE,
tron@3069: 	ROAD_Y   = ROAD_NW | ROAD_SE,
tron@3069: 	ROAD_ALL = ROAD_X  | ROAD_Y
tron@3069: } RoadBits;
tron@3069: 
tron@3103: static inline RoadBits ComplementRoadBits(RoadBits r)
tron@3103: {
tron@3103: 	return ROAD_ALL ^ r;
tron@3103: }
tron@3103: 
tron@3146: static inline RoadBits DiagDirToRoadBits(DiagDirection d)
tron@3146: {
tron@3146: 	return 1 << (3 ^ d);
tron@3146: }
tron@3146: 
tron@3146: 
tron@3369: typedef enum RoadType {
tron@3369: 	ROAD_NORMAL,
tron@3369: 	ROAD_CROSSING,
tron@3369: 	ROAD_DEPOT
tron@3369: } RoadType;
tron@3369: 
tron@3369: static inline RoadType GetRoadType(TileIndex t)
tron@3069: {
tron@3369: 	assert(IsTileType(t, MP_STREET));
tron@3369: 	return GB(_m[t].m5, 4, 4);
tron@3150: }
tron@3150: 
tron@3150: 
tron@3369: static inline RoadBits GetRoadBits(TileIndex t)
tron@3272: {
tron@3369: 	assert(GetRoadType(t) == ROAD_NORMAL);
tron@3369: 	return GB(_m[t].m5, 0, 4);
tron@3369: }
tron@3369: 
tron@3369: static inline void SetRoadBits(TileIndex t, RoadBits r)
tron@3369: {
tron@3369: 	assert(GetRoadType(t) == ROAD_NORMAL); // XXX incomplete
tron@3369: 	SB(_m[t].m5, 0, 4, r);
tron@3369: }
tron@3369: 
tron@3369: 
tron@3369: static inline Axis GetCrossingRoadAxis(TileIndex t)
tron@3369: {
tron@3369: 	assert(GetRoadType(t) == ROAD_CROSSING);
tron@3369: 	return (Axis)GB(_m[t].m5, 3, 1);
tron@3272: }
tron@3272: 
tron@3070: static inline RoadBits GetCrossingRoadBits(TileIndex tile)
tron@3070: {
tron@3272: 	return GetCrossingRoadAxis(tile) == AXIS_X ? ROAD_X : ROAD_Y;
tron@3070: }
tron@3070: 
tron@3103: static inline TrackBits GetCrossingRailBits(TileIndex tile)
tron@3103: {
tron@3272: 	return GetCrossingRoadAxis(tile) == AXIS_X ? TRACK_BIT_Y : TRACK_BIT_X;
tron@3103: }
tron@3103: 
tron@3103: 
tron@3274: // TODO swap owner of road and rail
tron@3274: static inline Owner GetCrossingRoadOwner(TileIndex t)
tron@3274: {
tron@3369: 	assert(GetRoadType(t) == ROAD_CROSSING);
tron@3274: 	return (Owner)_m[t].m3;
tron@3274: }
tron@3274: 
tron@3274: static inline void SetCrossingRoadOwner(TileIndex t, Owner o)
tron@3274: {
tron@3369: 	assert(GetRoadType(t) == ROAD_CROSSING);
tron@3274: 	_m[t].m3 = o;
tron@3274: }
tron@3274: 
celestar@3322: static inline void UnbarCrossing(TileIndex t)
celestar@3322: {
tron@3369: 	assert(GetRoadType(t) == ROAD_CROSSING);
celestar@3322: 	CLRBIT(_m[t].m5, 2);
celestar@3322: }
celestar@3322: 
celestar@3322: static inline void BarCrossing(TileIndex t)
celestar@3322: {
tron@3369: 	assert(GetRoadType(t) == ROAD_CROSSING);
celestar@3322: 	SETBIT(_m[t].m5, 2);
celestar@3322: }
celestar@3322: 
celestar@3322: static inline bool IsCrossingBarred(TileIndex t)
celestar@3322: {
tron@3369: 	assert(GetRoadType(t) == ROAD_CROSSING);
celestar@3322: 	return HASBIT(_m[t].m5, 2);
celestar@3322: }
tron@3274: 
tron@3069: 
tron@3369: static inline DiagDirection GetRoadDepotDirection(TileIndex t)
tron@3069: {
tron@3369: 	assert(GetRoadType(t) == ROAD_DEPOT);
tron@3369: 	return (DiagDirection)GB(_m[t].m5, 0, 2);
tron@3167: }
tron@3167: 
tron@3167: 
tron@3146: /**
tron@3146:  * Returns the RoadBits on an arbitrary tile
tron@3146:  * Special behavior:
tron@3146:  * - road depots: entrance is treated as road piece
tron@3146:  * - road tunnels: entrance is treated as road piece
tron@3196:  * - bridge ramps: start of the ramp is treated as road piece
tron@3146:  * - bridge middle parts: bridge itself is ignored
tron@3146:  */
tron@3146: RoadBits GetAnyRoadBits(TileIndex);
tron@3146: 
tron@3146: 
tron@3150: TrackBits GetAnyRoadTrackBits(TileIndex tile);
tron@3150: 
tron@3150: 
tron@3099: static inline void MakeRoadNormal(TileIndex t, Owner owner, RoadBits bits, uint town)
tron@3099: {
tron@3099: 	SetTileType(t, MP_STREET);
tron@3099: 	SetTileOwner(t, owner);
tron@3099: 	_m[t].m2 = town;
tron@3099: 	_m[t].m3 = 0;
tron@3099: 	_m[t].m4 = 0 << 7 | 0 << 4 | 0;
tron@3099: 	_m[t].m5 = ROAD_NORMAL << 4 | bits;
tron@3099: }
tron@3099: 
tron@3099: 
tron@3099: static inline void MakeRoadCrossing(TileIndex t, Owner road, Owner rail, Axis roaddir, RailType rt, uint town)
tron@3099: {
tron@3099: 	SetTileType(t, MP_STREET);
tron@3099: 	SetTileOwner(t, rail);
tron@3099: 	_m[t].m2 = town;
tron@3099: 	_m[t].m3 = road;
tron@3099: 	_m[t].m4 = 0 << 7 | 0 << 4 | rt;
tron@3099: 	_m[t].m5 = ROAD_CROSSING << 4 | roaddir << 3 | 0 << 2;
tron@3099: }
tron@3099: 
tron@3099: 
tron@3099: static inline void MakeRoadDepot(TileIndex t, Owner owner, DiagDirection dir)
tron@3099: {
tron@3099: 	SetTileType(t, MP_STREET);
tron@3099: 	SetTileOwner(t, owner);
tron@3099: 	_m[t].m2 = 0;
tron@3099: 	_m[t].m3 = 0;
tron@3099: 	_m[t].m4 = 0;
tron@3099: 	_m[t].m5 = ROAD_DEPOT << 4 | dir;
tron@3099: }
tron@3099: 
tron@3069: #endif