Files @ r8785:8312063c5ee4
Branch filter:

Location: cpp/openttd-patchpack/source/src/waypoint.cpp

rubidium
(svn r12489) -Codechange: split station.h into station_base.h and station_func.h.
  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
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
/* $Id$ */

/** @file waypoint.cpp */

#include "stdafx.h"
#include "openttd.h"

#include "command_func.h"
#include "landscape.h"
#include "order_func.h"
#include "rail_map.h"
#include "rail.h"
#include "bridge_map.h"
#include "saveload.h"
#include "station_base.h"
#include "town.h"
#include "waypoint.h"
#include "variables.h"
#include "yapf/yapf.h"
#include "newgrf.h"
#include "misc/autoptr.hpp"
#include "strings_func.h"
#include "gfx_func.h"
#include "functions.h"
#include "window_func.h"
#include "economy_func.h"
#include "date_func.h"
#include "vehicle_func.h"
#include "vehicle_base.h"
#include "string_func.h"
#include "signal_func.h"
#include "player_func.h"
#include "settings_type.h"

#include "table/strings.h"

DEFINE_OLD_POOL_GENERIC(Waypoint, Waypoint)


/**
 * Update the sign for the waypoint
 * @param wp Waypoint to update sign */
static void UpdateWaypointSign(Waypoint* wp)
{
	Point pt = RemapCoords2(TileX(wp->xy) * TILE_SIZE, TileY(wp->xy) * TILE_SIZE);
	SetDParam(0, wp->index);
	UpdateViewportSignPos(&wp->sign, pt.x, pt.y - 0x20, STR_WAYPOINT_VIEWPORT);
}

/**
 * Redraw the sign of a waypoint
 * @param wp Waypoint to redraw sign */
static void RedrawWaypointSign(const Waypoint* wp)
{
	MarkAllViewportsDirty(
		wp->sign.left - 6,
		wp->sign.top,
		wp->sign.left + (wp->sign.width_1 << 2) + 12,
		wp->sign.top + 48);
}

/**
 * Update all signs
 */
void UpdateAllWaypointSigns()
{
	Waypoint *wp;

	FOR_ALL_WAYPOINTS(wp) {
		UpdateWaypointSign(wp);
	}
}

/**
 * Set the default name for a waypoint
 * @param wp Waypoint to work on
 */
static void MakeDefaultWaypointName(Waypoint* wp)
{
	uint32 used = 0; // bitmap of used waypoint numbers, sliding window with 'next' as base
	uint32 next = 0; // first waypoint number in the bitmap
	WaypointID idx = 0; // index where we will stop

	wp->town_index = ClosestTownFromTile(wp->xy, (uint)-1)->index;

	/* Find first unused waypoint number belonging to this town. This can never fail,
	 * as long as there can be at most 65535 waypoints in total.
	 *
	 * This does 'n * m' search, but with 32bit 'used' bitmap, it needs at most 'n * (1 + ceil(m / 32))'
	 * steps (n - number of waypoints in pool, m - number of waypoints near this town).
	 * Usually, it needs only 'n' steps.
	 *
	 * If it wasn't using 'used' and 'idx', it would just search for increasing 'next',
	 * but this way it is faster */

	WaypointID cid = 0; // current index, goes to GetWaypointPoolSize()-1, then wraps to 0
	do {
		Waypoint *lwp = GetWaypoint(cid);

		/* check only valid waypoints... */
 		if (lwp->IsValid() && wp != lwp) {
			/* only waypoints with 'generic' name within the same city */
			if (lwp->name == NULL && lwp->town_index == wp->town_index) {
				/* if lwp->town_cn < next, uint will overflow to '+inf' */
				uint i = (uint)lwp->town_cn - next;

				if (i < 32) {
					SetBit(used, i); // update bitmap
					if (i == 0) {
						/* shift bitmap while the lowest bit is '1';
						 * increase the base of the bitmap too */
						do {
							used >>= 1;
							next++;
						} while (HasBit(used, 0));
						/* when we are at 'idx' again at end of the loop and
						 * 'next' hasn't changed, then no waypoint had town_cn == next,
						 * so we can safely use it */
						idx = cid;
					}
				}
			}
		}

		cid++;
		if (cid == GetWaypointPoolSize()) cid = 0; // wrap to zero...
	} while (cid != idx);

	wp->town_cn = (uint16)next; // set index...
	wp->name = NULL; // ... and use generic name
}

/**
 * Find a deleted waypoint close to a tile.
 * @param tile to search from
 */
static Waypoint *FindDeletedWaypointCloseTo(TileIndex tile)
{
	Waypoint *wp, *best = NULL;
	uint thres = 8;

	FOR_ALL_WAYPOINTS(wp) {
		if (wp->deleted) {
			uint cur_dist = DistanceManhattan(tile, wp->xy);

			if (cur_dist < thres) {
				thres = cur_dist;
				best = wp;
			}
		}
	}

	return best;
}

/**
 * Update waypoint graphics id against saved GRFID/localidx.
 * This is to ensure the chosen graphics are correct if GRF files are changed.
 */
void AfterLoadWaypoints()
{
	Waypoint *wp;

	FOR_ALL_WAYPOINTS(wp) {
		uint i;

		if (wp->grfid == 0) continue;

		for (i = 0; i < GetNumCustomStations(STAT_CLASS_WAYP); i++) {
			const StationSpec *statspec = GetCustomStationSpec(STAT_CLASS_WAYP, i);
			if (statspec != NULL && statspec->grffile->grfid == wp->grfid && statspec->localidx == wp->localidx) {
				wp->stat_id = i;
				break;
			}
		}
	}
}

/** Convert existing rail to waypoint. Eg build a waypoint station over
 * piece of rail
 * @param tile tile where waypoint will be built
 * @param flags type of operation
 * @param p1 graphics for waypoint type, 0 indicates standard graphics
 * @param p2 unused
 *
 * @todo When checking for the tile slope,
 * distingush between "Flat land required" and "land sloped in wrong direction"
 */
CommandCost CmdBuildTrainWaypoint(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
	Waypoint *wp;
	AutoPtrT<Waypoint> wp_auto_delete;
	Slope tileh;
	Axis axis;

	/* if custom gfx are used, make sure it is within bounds */
	if (p1 >= GetNumCustomStations(STAT_CLASS_WAYP)) return CMD_ERROR;

	if (!IsTileType(tile, MP_RAILWAY) ||
			GetRailTileType(tile) != RAIL_TILE_NORMAL || (
				(axis = AXIS_X, GetTrackBits(tile) != TRACK_BIT_X) &&
				(axis = AXIS_Y, GetTrackBits(tile) != TRACK_BIT_Y)
			)) {
		return_cmd_error(STR_1005_NO_SUITABLE_RAILROAD_TRACK);
	}

	if (!CheckTileOwnership(tile)) return CMD_ERROR;
	if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

	tileh = GetTileSlope(tile, NULL);
	if (tileh != SLOPE_FLAT &&
			(!_patches.build_on_slopes || IsSteepSlope(tileh) || !(tileh & (0x3 << axis)) || !(tileh & ~(0x3 << axis)))) {
		return_cmd_error(STR_0007_FLAT_LAND_REQUIRED);
	}

	if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST);

	/* Check if there is an already existing, deleted, waypoint close to us that we can reuse. */
	wp = FindDeletedWaypointCloseTo(tile);
	if (wp == NULL) {
		wp = new Waypoint(tile);
		if (wp == NULL) return CMD_ERROR;

		wp_auto_delete = wp;

		wp->town_index = INVALID_TOWN;
		wp->name = NULL;
		wp->town_cn = 0;
	} else if (flags & DC_EXEC) {
		/* Move existing (recently deleted) waypoint to the new location */

		/* First we update the destination for all vehicles that
		 * have the old waypoint in their orders. */
		Vehicle *v;
		FOR_ALL_VEHICLES(v) {
			if (v->type == VEH_TRAIN &&
					v->First() == v &&
					v->current_order.type == OT_GOTO_WAYPOINT &&
					v->dest_tile == wp->xy) {
				v->dest_tile = tile;
			}
		}

		RedrawWaypointSign(wp);
		wp->xy = tile;
	}

	if (flags & DC_EXEC) {
		const StationSpec* statspec;

		MakeRailWaypoint(tile, GetTileOwner(tile), axis, GetRailType(tile), wp->index);
		MarkTileDirtyByTile(tile);

		statspec = GetCustomStationSpec(STAT_CLASS_WAYP, p1);

		if (statspec != NULL) {
			wp->stat_id = p1;
			wp->grfid = statspec->grffile->grfid;
			wp->localidx = statspec->localidx;
		} else {
			/* Specified custom graphics do not exist, so use default. */
			wp->stat_id = 0;
			wp->grfid = 0;
			wp->localidx = 0;
		}

		wp->deleted = 0;
		wp->build_date = _date;

		if (wp->town_index == INVALID_TOWN) MakeDefaultWaypointName(wp);

		UpdateWaypointSign(wp);
		RedrawWaypointSign(wp);
		YapfNotifyTrackLayoutChange(tile, AxisToTrack(axis));
		wp_auto_delete.Detach();
	}

	return CommandCost(EXPENSES_CONSTRUCTION, _price.build_train_depot);
}

/**
 * Daily loop for waypoints
 */
void WaypointsDailyLoop()
{
	Waypoint *wp;

	/* Check if we need to delete a waypoint */
	FOR_ALL_WAYPOINTS(wp) {
		if (wp->deleted != 0 && --wp->deleted == 0) DeleteWaypoint(wp);
	}
}

/**
 * Remove a waypoint
 * @param tile from which to remove waypoint
 * @param flags type of operation
 * @param justremove will indicate if it is removed from rail or if rails are removed too
 * @return cost of operation or error
 */
CommandCost RemoveTrainWaypoint(TileIndex tile, uint32 flags, bool justremove)
{
	Waypoint *wp;

	/* Make sure it's a waypoint */
	if (!IsTileType(tile, MP_RAILWAY) ||
			!IsRailWaypoint(tile) ||
			(!CheckTileOwnership(tile) && _current_player != OWNER_WATER) ||
			!EnsureNoVehicleOnGround(tile)) {
		return CMD_ERROR;
	}

	if (flags & DC_EXEC) {
		Track track = GetRailWaypointTrack(tile);
		Owner owner = GetTileOwner(tile); // cannot use _current_player because of possible floods
		wp = GetWaypointByTile(tile);

		wp->deleted = 30; // let it live for this many days before we do the actual deletion.
		RedrawWaypointSign(wp);

		if (justremove) {
			MakeRailNormal(tile, GetTileOwner(tile), GetRailWaypointBits(tile), GetRailType(tile));
			MarkTileDirtyByTile(tile);
		} else {
			DoClearSquare(tile);
			AddTrackToSignalBuffer(tile, track, owner);
		}
		YapfNotifyTrackLayoutChange(tile, track);
	}

	return CommandCost(EXPENSES_CONSTRUCTION, _price.remove_train_depot);
}

/**
 * Delete a waypoint
 * @param tile tile where waypoint is to be deleted
 * @param flags type of operation
 * @param p1 unused
 * @param p2 unused
 * @return cost of operation or error
 */
CommandCost CmdRemoveTrainWaypoint(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
	return RemoveTrainWaypoint(tile, flags, true);
}

static bool IsUniqueWaypointName(const char *name)
{
	const Waypoint *wp;
	char buf[512];

	FOR_ALL_WAYPOINTS(wp) {
		SetDParam(0, wp->index);
		GetString(buf, STR_WAYPOINT_RAW, lastof(buf));
		if (strcmp(buf, name) == 0) return false;
	}

	return true;
}

/**
 * Rename a waypoint.
 * @param tile unused
 * @param flags type of operation
 * @param p1 id of waypoint
 * @param p2 unused
 * @return cost of operation or error
 */
CommandCost CmdRenameWaypoint(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
	Waypoint *wp;

	if (!IsValidWaypointID(p1)) return CMD_ERROR;

	wp = GetWaypoint(p1);
	if (!CheckTileOwnership(wp->xy)) return CMD_ERROR;

	if (!StrEmpty(_cmd_text)) {
		if (!IsUniqueWaypointName(_cmd_text)) return_cmd_error(STR_NAME_MUST_BE_UNIQUE);

		if (flags & DC_EXEC) {
			free(wp->name);
			wp->name = strdup(_cmd_text);
			wp->town_cn = 0;

			UpdateWaypointSign(wp);
			MarkWholeScreenDirty();
		}
	} else {
		if (flags & DC_EXEC) {
			free(wp->name);

			MakeDefaultWaypointName(wp);
			UpdateWaypointSign(wp);
			MarkWholeScreenDirty();
		}
	}
	return CommandCost();
}

/**
 * This hacks together some dummy one-shot Station structure for a waypoint.
 * @param tile on which to work
 * @return pointer to a Station
 */
Station *ComposeWaypointStation(TileIndex tile)
{
	Waypoint *wp = GetWaypointByTile(tile);

	/* instead of 'static Station stat' use byte array to avoid Station's destructor call upon exit. As
	 * a side effect, the station is not constructed now. */
	static byte stat_raw[sizeof(Station)];
	static Station &stat = *(Station*)stat_raw;

	stat.train_tile = stat.xy = wp->xy;
	stat.town = GetTown(wp->town_index);
	stat.build_date = wp->build_date;

	return &stat;
}

/**
 * Draw a waypoint
 * @param x coordinate
 * @param y coordinate
 * @param stat_id station id
 * @param railtype RailType to use for
 */
void DrawWaypointSprite(int x, int y, int stat_id, RailType railtype)
{
	x += 33;
	y += 17;

	if (!DrawStationTile(x, y, railtype, AXIS_X, STAT_CLASS_WAYP, stat_id)) {
		DrawDefaultWaypointSprite(x, y, railtype);
	}
}

Waypoint::Waypoint(TileIndex tile)
{
	this->xy = tile;
}

Waypoint::~Waypoint()
{
	free(this->name);

	if (CleaningPool()) return;

	RemoveOrderFromAllVehicles(OT_GOTO_WAYPOINT, this->index);

	RedrawWaypointSign(this);
	this->xy = 0;
}

/**
 * Fix savegames which stored waypoints in their old format
 */
void FixOldWaypoints()
{
	Waypoint *wp;

	/* Convert the old 'town_or_string', to 'string' / 'town' / 'town_cn' */
	FOR_ALL_WAYPOINTS(wp) {
		wp->town_index = ClosestTownFromTile(wp->xy, (uint)-1)->index;
		wp->town_cn = 0;
		if (wp->string & 0xC000) {
			wp->town_cn = wp->string & 0x3F;
			wp->string = STR_NULL;
		}
	}
}

void InitializeWaypoints()
{
	_Waypoint_pool.CleanPool();
	_Waypoint_pool.AddBlockToPool();
}

static const SaveLoad _waypoint_desc[] = {
	SLE_CONDVAR(Waypoint, xy,         SLE_FILE_U16 | SLE_VAR_U32,  0, 5),
	SLE_CONDVAR(Waypoint, xy,         SLE_UINT32,                  6, SL_MAX_VERSION),
	SLE_CONDVAR(Waypoint, town_index, SLE_UINT16,                 12, SL_MAX_VERSION),
	SLE_CONDVAR(Waypoint, town_cn,    SLE_FILE_U8 | SLE_VAR_U16,  12, 88),
	SLE_CONDVAR(Waypoint, town_cn,    SLE_UINT16,                 89, SL_MAX_VERSION),
	SLE_CONDVAR(Waypoint, string,     SLE_STRINGID,                0, 83),
	SLE_CONDSTR(Waypoint, name,       SLE_STR, 0,                 84, SL_MAX_VERSION),
	    SLE_VAR(Waypoint, deleted,    SLE_UINT8),

	SLE_CONDVAR(Waypoint, build_date, SLE_FILE_U16 | SLE_VAR_I32,  3, 30),
	SLE_CONDVAR(Waypoint, build_date, SLE_INT32,                  31, SL_MAX_VERSION),
	SLE_CONDVAR(Waypoint, localidx,   SLE_UINT8,                   3, SL_MAX_VERSION),
	SLE_CONDVAR(Waypoint, grfid,      SLE_UINT32,                 17, SL_MAX_VERSION),

	SLE_END()
};

static void Save_WAYP()
{
	Waypoint *wp;

	FOR_ALL_WAYPOINTS(wp) {
		SlSetArrayIndex(wp->index);
		SlObject(wp, _waypoint_desc);
	}
}

static void Load_WAYP()
{
	int index;

	while ((index = SlIterateArray()) != -1) {
		Waypoint *wp = new (index) Waypoint();
		SlObject(wp, _waypoint_desc);
	}
}

extern const ChunkHandler _waypoint_chunk_handlers[] = {
	{ 'CHKP', Save_WAYP, Load_WAYP, CH_ARRAY | CH_LAST},
};