summaryrefslogtreecommitdiff
path: root/rail_map.h
blob: c3bfc96819bed829201240f7f2746ca00fefdfff (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
/* $Id$ */

#ifndef RAIL_MAP_H
#define RAIL_MAP_H

#include "direction.h"
#include "rail.h"
#include "tile.h"


typedef enum RailTileType {
	RAIL_TILE_NORMAL         = 0x0,
	RAIL_TILE_SIGNALS        = 0x40,
	RAIL_TILE_UNUSED         = 0x80, /* XXX: Maybe this could become waypoints? */
	RAIL_TILE_DEPOT_WAYPOINT = 0xC0, /* Is really depots and waypoints... */
	RAIL_TILE_TYPE_MASK      = 0xC0
} RailTileType;

static inline RailTileType GetRailTileType(TileIndex t)
{
	assert(IsTileType(t, MP_RAILWAY));
	return (RailTileType)(_m[t].m5 & RAIL_TILE_TYPE_MASK);
}

/**
 * Returns whether this is plain rails, with or without signals. Iow, if this
 * tiles RailTileType is RAIL_TILE_NORMAL or RAIL_TILE_SIGNALS.
 */
static inline bool IsPlainRailTile(TileIndex tile)
{
	RailTileType rtt = GetRailTileType(tile);
	return rtt == RAIL_TILE_NORMAL || rtt == RAIL_TILE_SIGNALS;
}

/**
 * Checks if a rail tile has signals.
 */
static inline bool HasSignals(TileIndex tile)
{
	return GetRailTileType(tile) == RAIL_TILE_SIGNALS;
}


/** These specify the subtype when the main rail type is
 * RAIL_TILE_DEPOT_WAYPOINT */
typedef enum RailTileSubtypes {
	RAIL_SUBTYPE_DEPOT    = 0x00,
	RAIL_SUBTYPE_WAYPOINT = 0x04,
	RAIL_SUBTYPE_MASK     = 0x3C
} RailTileSubtype;

/**
 * Returns the RailTileSubtype of a given rail tile with type
 * RAIL_TILE_DEPOT_WAYPOINT
 */
static inline RailTileSubtype GetRailTileSubtype(TileIndex tile)
{
	assert(GetRailTileType(tile) == RAIL_TILE_DEPOT_WAYPOINT);
	return (RailTileSubtype)(_m[tile].m5 & RAIL_SUBTYPE_MASK);
}


static inline bool IsRailDepot(TileIndex t)
{
	return
		GetRailTileType(t) == RAIL_TILE_DEPOT_WAYPOINT &&
		GetRailTileSubtype(t) == RAIL_SUBTYPE_DEPOT;
}


static inline bool IsRailWaypoint(TileIndex t)
{
	return
		GetRailTileType(t) == RAIL_TILE_DEPOT_WAYPOINT &&
		GetRailTileSubtype(t) == RAIL_SUBTYPE_WAYPOINT;
}


static inline RailType GetRailType(TileIndex t)
{
	return (RailType)GB(_m[t].m3, 0, 4);
}

// TODO remove this by moving to the same bits as GetRailType()
static inline RailType GetRailTypeCrossing(TileIndex t)
{
	return (RailType)GB(_m[t].m4, 0, 4);
}

static inline RailType GetRailTypeOnBridge(TileIndex t)
{
	return (RailType)GB(_m[t].m3, 4, 4);
}

static inline void SetRailType(TileIndex t, RailType r)
{
	SB(_m[t].m3, 0, 4, r);
}

// TODO remove this by moving to the same bits as SetRailType()
static inline void SetRailTypeCrossing(TileIndex t, RailType r)
{
	SB(_m[t].m4, 0, 4, r);
}

static inline void SetRailTypeOnBridge(TileIndex t, RailType r)
{
	SB(_m[t].m3, 4, 4, r);
}


static inline TrackBits GetTrackBits(TileIndex tile)
{
	return (TrackBits)GB(_m[tile].m5, 0, 6);
}

static inline void SetTrackBits(TileIndex t, TrackBits b)
{
	SB(_m[t].m5, 0, 6, b);
}

/**
 * Returns whether the given track is present on the given tile. Tile must be
 * a plain rail tile (IsPlainRailTile()).
 */
static inline bool HasTrack(TileIndex tile, Track track)
{
	return HASBIT(GetTrackBits(tile), track);
}


static inline DiagDirection GetRailDepotDirection(TileIndex t)
{
	return (DiagDirection)GB(_m[t].m5, 0, 2);
}


static inline Axis GetWaypointAxis(TileIndex t)
{
	return (Axis)GB(_m[t].m5, 0, 1);
}

static inline Track GetRailWaypointTrack(TileIndex t)
{
	return AxisToTrack(GetWaypointAxis(t));
}

static inline TrackBits GetRailWaypointBits(TileIndex t)
{
	return TrackToTrackBits(GetRailWaypointTrack(t));
}


typedef enum SignalType {
	SIGTYPE_NORMAL  = 0, // normal signal
	SIGTYPE_ENTRY   = 1, // presignal block entry
	SIGTYPE_EXIT    = 2, // presignal block exit
	SIGTYPE_COMBO   = 3  // presignal inter-block
} SignalType;

static inline SignalType GetSignalType(TileIndex t)
{
	assert(GetRailTileType(t) == RAIL_TILE_SIGNALS);
	return (SignalType)GB(_m[t].m4, 0, 2);
}

static inline void SetSignalType(TileIndex t, SignalType s)
{
	assert(GetRailTileType(t) == RAIL_TILE_SIGNALS);
	SB(_m[t].m4, 0, 2, s);
}

static inline bool IsPresignalEntry(TileIndex t)
{
	return GetSignalType(t) == SIGTYPE_ENTRY || GetSignalType(t) == SIGTYPE_COMBO;
}

static inline bool IsPresignalExit(TileIndex t)
{
	return GetSignalType(t) == SIGTYPE_EXIT || GetSignalType(t) == SIGTYPE_COMBO;
}

static inline void CycleSignalSide(TileIndex t, Track track)
{
	byte sig;
	byte pos = 6;
	if (track == TRACK_LOWER || track == TRACK_RIGHT) pos = 4;

	sig = GB(_m[t].m3, pos, 2);
	if (--sig == 0) sig = 3;
	SB(_m[t].m3, pos, 2, sig);
}


typedef enum SignalVariant {
	SIG_ELECTRIC  = 0,
	SIG_SEMAPHORE = 1
} SignalVariant;

static inline SignalVariant GetSignalVariant(TileIndex t)
{
	return (SignalVariant)GB(_m[t].m4, 2, 1);
}

static inline void SetSignalVariant(TileIndex t, SignalVariant v)
{
	SB(_m[t].m4, 2, 1, v);
}

static inline bool IsSignalPresent(TileIndex t, byte signalbit)
{
	return HASBIT(_m[t].m3, signalbit + 4);
}

/** These are states in which a signal can be. Currently these are only two, so
 * simple boolean logic will do. But do try to compare to this enum instead of
 * normal boolean evaluation, since that will make future additions easier.
 */
typedef enum SignalStates {
	SIGNAL_STATE_RED   = 0,
	SIGNAL_STATE_GREEN = 1,
} SignalState;

static inline SignalState GetSingleSignalState(TileIndex t, byte signalbit)
{
	return (SignalState)HASBIT(_m[t].m2, signalbit + 4);
}


/**
 * Checks for the presence of signals (either way) on the given track on the
 * given rail tile.
 */
static inline bool HasSignalOnTrack(TileIndex tile, Track track)
{
	assert(IsValidTrack(track));
	return
		GetRailTileType(tile) == RAIL_TILE_SIGNALS &&
		(_m[tile].m3 & SignalOnTrack(track)) != 0;
}

/**
 * Checks for the presence of signals along the given trackdir on the given
 * rail tile.
 *
 * Along meaning if you are currently driving on the given trackdir, this is
 * the signal that is facing us (for which we stop when it's red).
 */
static inline bool HasSignalOnTrackdir(TileIndex tile, Trackdir trackdir)
{
	assert (IsValidTrackdir(trackdir));
	return
		GetRailTileType(tile) == RAIL_TILE_SIGNALS &&
		_m[tile].m3 & SignalAlongTrackdir(trackdir);
}

/**
 * Gets the state of the signal along the given trackdir.
 *
 * Along meaning if you are currently driving on the given trackdir, this is
 * the signal that is facing us (for which we stop when it's red).
 */
static inline SignalState GetSignalStateByTrackdir(TileIndex tile, Trackdir trackdir)
{
	assert(IsValidTrackdir(trackdir));
	assert(HasSignalOnTrack(tile, TrackdirToTrack(trackdir)));
	return _m[tile].m2 & SignalAlongTrackdir(trackdir) ?
		SIGNAL_STATE_GREEN : SIGNAL_STATE_RED;
}


/**
 * Return the rail type of tile, or INVALID_RAILTYPE if this is no rail tile.
 * Note that there is no check if the given trackdir is actually present on
 * the tile!
 * The given trackdir is used when there are (could be) multiple rail types on
 * one tile.
 */
RailType GetTileRailType(TileIndex tile, Trackdir trackdir);


typedef enum RailGroundType {
	RAIL_GROUND_BARREN       =  0,
	RAIL_GROUND_GRASS        =  1,
	RAIL_GROUND_FENCE_NW     =  2,
	RAIL_GROUND_FENCE_SE     =  3,
	RAIL_GROUND_FENCE_SENW   =  4,
	RAIL_GROUND_FENCE_NE     =  5,
	RAIL_GROUND_FENCE_SW     =  6,
	RAIL_GROUND_FENCE_NESW   =  7,
	RAIL_GROUND_FENCE_VERT1  =  8,
	RAIL_GROUND_FENCE_VERT2  =  9,
	RAIL_GROUND_FENCE_HORIZ1 = 10,
	RAIL_GROUND_FENCE_HORIZ2 = 11,
	RAIL_GROUND_ICE_DESERT   = 12,
} RailGroundType;

static inline void SetRailGroundType(TileIndex t, RailGroundType rgt)
{
	if (GetRailTileType(t) == RAIL_TILE_DEPOT_WAYPOINT) {
		SB(_m[t].m4, 0, 4, rgt);
		return;
	}
	SB(_m[t].m2, 0, 4, rgt);
}

static inline RailGroundType GetRailGroundType(TileIndex t)
{
	/* TODO Unify this */
	if (GetRailTileType(t) == RAIL_TILE_DEPOT_WAYPOINT) return (RailGroundType)GB(_m[t].m4, 0, 4);
	return (RailGroundType)GB(_m[t].m2, 0, 4);
}

static inline bool IsSnowRailGround(TileIndex t)
{
	return GetRailGroundType(t) == RAIL_GROUND_ICE_DESERT;
}


static inline void MakeRailNormal(TileIndex t, Owner o, TrackBits b, RailType r)
{
	SetTileType(t, MP_RAILWAY);
	SetTileOwner(t, o);
	_m[t].m2 = 0;
	_m[t].m3 = r;
	_m[t].m4 = 0;
	_m[t].m5 = RAIL_TILE_NORMAL | b;
}


static inline void MakeRailDepot(TileIndex t, Owner o, DiagDirection d, RailType r)
{
	SetTileType(t, MP_RAILWAY);
	SetTileOwner(t, o);
	_m[t].m2 = 0;
	_m[t].m3 = r;
	_m[t].m4 = 0;
	_m[t].m5 = RAIL_TILE_DEPOT_WAYPOINT | RAIL_SUBTYPE_DEPOT | d;
}


static inline void MakeRailWaypoint(TileIndex t, Owner o, Axis a, RailType r, uint index)
{
	SetTileType(t, MP_RAILWAY);
	SetTileOwner(t, o);
	_m[t].m2 = index;
	_m[t].m3 = r;
	_m[t].m4 = 0;
	_m[t].m5 = RAIL_TILE_DEPOT_WAYPOINT | RAIL_SUBTYPE_WAYPOINT | a;
}

#endif /* RAIL_MAP_H */