summaryrefslogtreecommitdiff
path: root/src/waypoint.cpp
blob: fe74d7ca7840ea287aea8e10e3da3f7f2ce44493 (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
/* $Id$ */

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

#include "command.h"
#include "functions.h"
#include "gfx.h"
#include "map.h"
#include "order.h"
#include "rail_map.h"
#include "bridge_map.h"
#include "saveload.h"
#include "station.h"
#include "tile.h"
#include "town.h"
#include "waypoint.h"
#include "variables.h"
#include "table/strings.h"
#include "vehicle.h"
#include "yapf/yapf.h"
#include "date.h"

enum {
	MAX_WAYPOINTS_PER_TOWN = 64,
};

/**
 * Called if a new block is added to the waypoint-pool
 */
static void WaypointPoolNewBlock(uint start_item)
{
	Waypoint *wp;

	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.
	 * TODO - This is just a temporary stage, this will be removed. */
	for (wp = GetWaypoint(start_item); wp != NULL; wp = (wp->index + 1U < GetWaypointPoolSize()) ? GetWaypoint(wp->index + 1U) : NULL) wp->index = start_item++;
}

DEFINE_OLD_POOL(Waypoint, Waypoint, WaypointPoolNewBlock, NULL)

/* Create a new waypoint */
static Waypoint* AllocateWaypoint(void)
{
	Waypoint *wp;

	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.
	 * TODO - This is just a temporary stage, this will be removed. */
	for (wp = GetWaypoint(0); wp != NULL; wp = (wp->index + 1U < GetWaypointPoolSize()) ? GetWaypoint(wp->index + 1U) : NULL) {
		if (!IsValidWaypoint(wp)) {
			uint index = wp->index;

			memset(wp, 0, sizeof(*wp));
			wp->index = index;

			return wp;
		}
	}

	/* Check if we can add a block to the pool */
	if (AddBlockToPool(&_Waypoint_pool)) return AllocateWaypoint();

	return NULL;
}

/* Update the sign for the waypoint */
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 */
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(void)
{
	Waypoint *wp;

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

/* Internal handler to delete a waypoint */
void DestroyWaypoint(Waypoint *wp)
{
	RemoveOrderFromAllVehicles(OT_GOTO_WAYPOINT, wp->index);

	if (wp->string != STR_NULL) DeleteName(wp->string);

	RedrawWaypointSign(wp);
}

/* Set the default name for a waypoint */
static void MakeDefaultWaypointName(Waypoint* wp)
{
	Waypoint *local_wp;
	bool used_waypoint[MAX_WAYPOINTS_PER_TOWN];
	int i;

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

	memset(used_waypoint, 0, sizeof(used_waypoint));

	/* Find an unused waypoint number belonging to this town */
	FOR_ALL_WAYPOINTS(local_wp) {
		if (wp == local_wp) continue;

		if (local_wp->xy && local_wp->string == STR_NULL && local_wp->town_index == wp->town_index)
			used_waypoint[local_wp->town_cn] = true;
	}

	/* Find an empty spot */
	for (i = 0; used_waypoint[i] && i < MAX_WAYPOINTS_PER_TOWN; i++) {}

	wp->string = STR_NULL;
	wp->town_cn = i;
}

/* Find a deleted waypoint close to a tile. */
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(void)
{
	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->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 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"
 */
int32 CmdBuildTrainWaypoint(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
	Waypoint *wp;
	Slope tileh;
	Axis axis;

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

	/* 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 (!EnsureNoVehicle(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 = AllocateWaypoint();
		if (wp == NULL) return CMD_ERROR;

		wp->town_index = 0;
		wp->string = STR_NULL;
		wp->town_cn = 0;
	}

	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->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->xy = tile;
		wp->build_date = _date;

		if (wp->town_index == 0) MakeDefaultWaypointName(wp);

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

	return _price.build_train_depot;
}

/* Daily loop for waypoints */
void WaypointsDailyLoop(void)
{
	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 */
int32 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) ||
			!EnsureNoVehicle(tile)) {
		return CMD_ERROR;
	}

	if (flags & DC_EXEC) {
		Track track = GetRailWaypointTrack(tile);
		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);
			SetSignalsOnBothDir(tile, track);
		}
		YapfNotifyTrackLayoutChange(tile, track);
	}

	return _price.remove_train_depot;
}

/** Delete a waypoint
 * @param tile tile where waypoint is to be deleted
 * @param p1 unused
 * @param p2 unused
 */
int32 CmdRemoveTrainWaypoint(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);
	return RemoveTrainWaypoint(tile, flags, true);
}

/** Rename a waypoint.
 * @param tile unused
 * @param p1 id of waypoint
 * @param p2 unused
 */
int32 CmdRenameWaypoint(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
	Waypoint *wp;

	if (!IsValidWaypointID(p1)) return CMD_ERROR;

	if (_cmd_text[0] != '\0') {
		StringID str = AllocateNameUnique(_cmd_text, 0);

		if (str == 0) return CMD_ERROR;

		if (flags & DC_EXEC) {
			wp = GetWaypoint(p1);
			if (wp->string != STR_NULL) DeleteName(wp->string);

			wp->string = str;
			wp->town_cn = 0;

			UpdateWaypointSign(wp);
			MarkWholeScreenDirty();
		} else {
			DeleteName(str);
		}
	} else {
		if (flags & DC_EXEC) {
			wp = GetWaypoint(p1);
			if (wp->string != STR_NULL) DeleteName(wp->string);

			MakeDefaultWaypointName(wp);
			UpdateWaypointSign(wp);
			MarkWholeScreenDirty();
		}
	}
	return 0;
}

/* This hacks together some dummy one-shot Station structure for a waypoint. */
Station *ComposeWaypointStation(TileIndex tile)
{
	Waypoint *wp = GetWaypointByTile(tile);
	static Station stat;

	stat.train_tile = stat.xy = wp->xy;
	stat.town = GetTown(wp->town_index);
	stat.string_id = wp->string == STR_NULL ? /* FIXME? */ 0 : wp->string;
	stat.build_date = wp->build_date;

	return &stat;
}

/* Draw a waypoint */
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);
	}
}

/* Fix savegames which stored waypoints in their old format */
void FixOldWaypoints(void)
{
	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(void)
{
	CleanPool(&_Waypoint_pool);
	AddBlockToPool(&_Waypoint_pool);
}

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_UINT8,                  12, SL_MAX_VERSION),
	    SLE_VAR(Waypoint, string,     SLE_UINT16),
	    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(void)
{
	Waypoint *wp;

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

static void Load_WAYP(void)
{
	int index;

	while ((index = SlIterateArray()) != -1) {
		Waypoint *wp;

		if (!AddBlockIfNeeded(&_Waypoint_pool, index))
			error("Waypoints: failed loading savegame: too many waypoints");

		wp = GetWaypoint(index);
		SlObject(wp, _waypoint_desc);
	}
}

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