summaryrefslogtreecommitdiff
path: root/src/rail_map.h
blob: a87c400f4b67841299efd72e7e5dc09c09141347 (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
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
/* $Id$ */

/** @file rail_map.h Hides the direct accesses to the map array with map accessors */

#ifndef RAIL_MAP_H
#define RAIL_MAP_H

#include "rail_type.h"
#include "signal_func.h"
#include "direction_func.h"
#include "track_func.h"
#include "tile_map.h"
#include "signal_type.h"


/** Different types of Rail-related tiles */
enum RailTileType {
	RAIL_TILE_NORMAL   = 0, ///< Normal rail tile without signals
	RAIL_TILE_SIGNALS  = 1, ///< Normal rail tile with signals
	RAIL_TILE_WAYPOINT = 2, ///< Waypoint (X or Y direction)
	RAIL_TILE_DEPOT    = 3, ///< Depot (one entrance)
};

/**
 * Returns the RailTileType (normal with or without signals,
 * waypoint or depot).
 * @param t the tile to get the information from
 * @pre IsTileType(t, MP_RAILWAY)
 * @return the RailTileType
 */
static inline RailTileType GetRailTileType(TileIndex t)
{
	assert(IsTileType(t, MP_RAILWAY));
	return (RailTileType)GB(_m[t].m5, 6, 2);
}

/**
 * Returns whether this is plain rails, with or without signals. Iow, if this
 * tiles RailTileType is RAIL_TILE_NORMAL or RAIL_TILE_SIGNALS.
 * @param t the tile to get the information from
 * @pre IsTileType(t, MP_RAILWAY)
 * @return true if and only if the tile is normal rail (with or without signals)
 */
static inline bool IsPlainRailTile(TileIndex t)
{
	RailTileType rtt = GetRailTileType(t);
	return rtt == RAIL_TILE_NORMAL || rtt == RAIL_TILE_SIGNALS;
}

/**
 * Checks if a rail tile has signals.
 * @param t the tile to get the information from
 * @pre IsTileType(t, MP_RAILWAY)
 * @return true if and only if the tile has signals
 */
static inline bool HasSignals(TileIndex t)
{
	return GetRailTileType(t) == RAIL_TILE_SIGNALS;
}

/**
 * Add/remove the 'has signal' bit from the RailTileType
 * @param tile the tile to add/remove the signals to/from
 * @param signals whether the rail tile should have signals or not
 * @pre IsPlainRailTile(tile)
 */
static inline void SetHasSignals(TileIndex tile, bool signals)
{
	assert(IsPlainRailTile(tile));
	SB(_m[tile].m5, 6, 1, signals);
}

/**
 * Is this tile a rail depot?
 * @param t the tile to get the information from
 * @pre IsTileType(t, MP_RAILWAY)
 * @return true if and only if the tile is a rail depot
 */
static inline bool IsRailDepot(TileIndex t)
{
	return GetRailTileType(t) == RAIL_TILE_DEPOT;
}

/**
 * Is this tile a rail waypoint?
 * @param t the tile to get the information from
 * @pre IsTileType(t, MP_RAILWAY)
 * @return true if and only if the tile is a rail waypoint
 */
static inline bool IsRailWaypoint(TileIndex t)
{
	return GetRailTileType(t) == RAIL_TILE_WAYPOINT;
}


/**
 * Gets the rail type of the given tile
 * @param t the tile to get the rail type from
 * @return the rail type of the tile
 */
static inline RailType GetRailType(TileIndex t)
{
	return (RailType)GB(_m[t].m3, 0, 4);
}

/**
 * Sets the rail type of the given tile
 * @param t the tile to set the rail type of
 * @param r the new rail type for the tile
 */
static inline void SetRailType(TileIndex t, RailType r)
{
	SB(_m[t].m3, 0, 4, r);
}


/**
 * Gets the track bits of the given tile
 * @param t the tile to get the track bits from
 * @return the track bits of the tile
 */
static inline TrackBits GetTrackBits(TileIndex tile)
{
	return (TrackBits)GB(_m[tile].m5, 0, 6);
}

/**
 * Sets the track bits of the given tile
 * @param t the tile to set the track bits of
 * @param b the new track bits for the tile
 */
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.
 * @param tile  the tile to check the track presence of
 * @param track the track to search for on the tile
 * @pre IsPlainRailTile(tile)
 * @return true if and only if the given track exists on the tile
 */
static inline bool HasTrack(TileIndex tile, Track track)
{
	return HasBit(GetTrackBits(tile), track);
}

/**
 * Returns the direction the depot is facing to
 * @param t the tile to get the depot facing from
 * @pre IsRailDepotTile(t)
 * @return the direction the depot is facing
 */
static inline DiagDirection GetRailDepotDirection(TileIndex t)
{
	return (DiagDirection)GB(_m[t].m5, 0, 2);
}


/**
 * Returns the axis of the waypoint
 * @param t the tile to get the waypoint axis from
 * @pre IsRailWaypointTile(t)
 * @return the axis of the waypoint
 */
static inline Axis GetWaypointAxis(TileIndex t)
{
	return (Axis)GB(_m[t].m5, 0, 1);
}

/**
 * Returns the track of the waypoint
 * @param t the tile to get the waypoint track from
 * @pre IsRailWaypointTile(t)
 * @return the track of the waypoint
 */
static inline Track GetRailWaypointTrack(TileIndex t)
{
	return AxisToTrack(GetWaypointAxis(t));
}

/**
 * Returns the track bits of the waypoint
 * @param t the tile to get the waypoint track bits from
 * @pre IsRailWaypointTile(t)
 * @return the track bits of the waypoint
 */
static inline TrackBits GetRailWaypointBits(TileIndex t)
{
	return TrackToTrackBits(GetRailWaypointTrack(t));
}

/**
 * Returns waypoint index (for the waypoint pool)
 * @param t the tile to get the waypoint index from
 * @pre IsRailWaypointTile(t)
 * @return the waypoint index
 */
static inline WaypointID GetWaypointIndex(TileIndex t)
{
	return (WaypointID)_m[t].m2;
}

static inline SignalType GetSignalType(TileIndex t, Track track)
{
	assert(GetRailTileType(t) == RAIL_TILE_SIGNALS);
	byte pos = (track == TRACK_LOWER || track == TRACK_RIGHT) ? 4 : 0;
	return (SignalType)GB(_m[t].m2, pos, 2);
}

static inline void SetSignalType(TileIndex t, Track track, SignalType s)
{
	assert(GetRailTileType(t) == RAIL_TILE_SIGNALS);
	byte pos = (track == TRACK_LOWER || track == TRACK_RIGHT) ? 4 : 0;
	SB(_m[t].m2, pos, 2, s);
	if (track == INVALID_TRACK) SB(_m[t].m2, 4, 2, s);
}

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

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

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

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

static inline SignalVariant GetSignalVariant(TileIndex t, Track track)
{
	byte pos = (track == TRACK_LOWER || track == TRACK_RIGHT) ? 6 : 2;
	return (SignalVariant)GB(_m[t].m2, pos, 1);
}

static inline void SetSignalVariant(TileIndex t, Track track, SignalVariant v)
{
	byte pos = (track == TRACK_LOWER || track == TRACK_RIGHT) ? 6 : 2;
	SB(_m[t].m2, pos, 1, v);
	if (track == INVALID_TRACK) SB(_m[t].m2, 6, 1, v);
}

/** 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.
 */
enum SignalState {
	SIGNAL_STATE_RED   = 0, ///< The signal is red
	SIGNAL_STATE_GREEN = 1, ///< The signal is green
};

/**
 * Set the states of the signals (Along/AgainstTrackDir)
 * @param tile  the tile to set the states for
 * @param state the new state
 */
static inline void SetSignalStates(TileIndex tile, uint state)
{
	SB(_m[tile].m4, 4, 4, state);
}

/**
 * Set the states of the signals (Along/AgainstTrackDir)
 * @param tile  the tile to set the states for
 * @param state the new state
 */
static inline uint GetSignalStates(TileIndex tile)
{
	return GB(_m[tile].m4, 4, 4);
}

/**
 * Get the state of a single signal
 * @param t         the tile to get the signal state for
 * @param signalbit the signal
 * @return the state of the signal
 */
static inline SignalState GetSingleSignalState(TileIndex t, byte signalbit)
{
	return (SignalState)HasBit(GetSignalStates(t), signalbit);
}

/**
 * Set whether the given signals are present (Along/AgainstTrackDir)
 * @param tile    the tile to set the present signals for
 * @param signals the signals that have to be present
 */
static inline void SetPresentSignals(TileIndex tile, uint signals)
{
	SB(_m[tile].m3, 4, 4, signals);
}

/**
 * Get whether the given signals are present (Along/AgainstTrackDir)
 * @param tile the tile to get the present signals for
 * @return the signals that are present
 */
static inline uint GetPresentSignals(TileIndex tile)
{
	return GB(_m[tile].m3, 4, 4);
}

/**
 * Checks whether the given signals is present
 * @param t         the tile to check on
 * @param signalbit the signal
 * @return true if and only if the signal is present
 */
static inline bool IsSignalPresent(TileIndex t, byte signalbit)
{
	return HasBit(GetPresentSignals(t), signalbit);
}

/**
 * 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 &&
		(GetPresentSignals(tile) & 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 &&
		GetPresentSignals(tile) & 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 GetSignalStates(tile) & SignalAlongTrackdir(trackdir) ?
		SIGNAL_STATE_GREEN : SIGNAL_STATE_RED;
}

/**
 * Sets the state of the signal along the given trackdir.
 */
static inline void SetSignalStateByTrackdir(TileIndex tile, Trackdir trackdir, SignalState state)
{
	if (state == SIGNAL_STATE_GREEN) { // set 1
		SetSignalStates(tile, GetSignalStates(tile) | SignalAlongTrackdir(trackdir));
	} else {
		SetSignalStates(tile, GetSignalStates(tile) & ~SignalAlongTrackdir(trackdir));
	}
}


/**
 * Return the rail type of tile, or INVALID_RAILTYPE if this is no rail tile.
 */
RailType GetTileRailType(TileIndex tile);

/** The ground 'under' the rail */
enum RailGroundType {
	RAIL_GROUND_BARREN       =  0, ///< Nothing (dirt)
	RAIL_GROUND_GRASS        =  1, ///< Grassy
	RAIL_GROUND_FENCE_NW     =  2, ///< Grass with a fence at the NW edge
	RAIL_GROUND_FENCE_SE     =  3, ///< Grass with a fence at the SE edge
	RAIL_GROUND_FENCE_SENW   =  4, ///< Grass with a fence at the NW and SE edges
	RAIL_GROUND_FENCE_NE     =  5, ///< Grass with a fence at the NE edge
	RAIL_GROUND_FENCE_SW     =  6, ///< Grass with a fence at the SW edge
	RAIL_GROUND_FENCE_NESW   =  7, ///< Grass with a fence at the NE and SW edges
	RAIL_GROUND_FENCE_VERT1  =  8, ///< Grass with a fence at the eastern side
	RAIL_GROUND_FENCE_VERT2  =  9, ///< Grass with a fence at the western side
	RAIL_GROUND_FENCE_HORIZ1 = 10, ///< Grass with a fence at the southern side
	RAIL_GROUND_FENCE_HORIZ2 = 11, ///< Grass with a fence at the northern side
	RAIL_GROUND_ICE_DESERT   = 12, ///< Icy or sandy
	RAIL_GROUND_WATER        = 13, ///< Grass with a fence and shore or water on the free halftile
	RAIL_GROUND_HALF_SNOW    = 14, ///< Snow only on higher part of slope (steep or one corner raised)
};

static inline void SetRailGroundType(TileIndex t, RailGroundType rgt)
{
	SB(_m[t].m4, 0, 4, rgt);
}

static inline RailGroundType GetRailGroundType(TileIndex t)
{
	return (RailGroundType)GB(_m[t].m4, 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 << 6 | 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 << 6 | 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_WAYPOINT << 6 | a;
}

#endif /* RAIL_MAP_H */