summaryrefslogtreecommitdiff
path: root/src/town.h
blob: cbd95cbe1feef256db1d9e1f662eb6faf375b0bc (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
/* $Id$ */

/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file town.h Base of the town class. */

#ifndef TOWN_H
#define TOWN_H

#include "core/pool_type.hpp"
#include "viewport_type.h"
#include "command_type.h"
#include "town_map.h"
#include "subsidy_type.h"

template <typename T>
struct BuildingCounts {
	T id_count[HOUSE_MAX];
	T class_count[HOUSE_CLASS_MAX];
};

static const uint CUSTOM_TOWN_NUMBER_DIFFICULTY  = 4; ///< value for custom town number in difficulty settings
static const uint CUSTOM_TOWN_MAX_NUMBER = 5000;  ///< this is the maximum number of towns a user can specify in customisation

static const uint INVALID_TOWN = 0xFFFF;

typedef Pool<Town, TownID, 64, 64000> TownPool;
extern TownPool _town_pool;

struct Town : TownPool::PoolItem<&_town_pool> {
	TileIndex xy;

	/* Current population of people and amount of houses. */
	uint32 num_houses;
	uint32 population;

	/* Town name */
	uint32 townnamegrfid;
	uint16 townnametype;
	uint32 townnameparts;
	char *name;

	/* NOSAVE: Location of name sign, UpdateVirtCoord updates this. */
	ViewportSign sign;

	/* Makes sure we don't build certain house types twice.
	 * bit 0 = Building funds received
	 * bit 1 = CHURCH
	 * bit 2 = STADIUM */
	byte flags;

	/* level of noise that all the airports are generating */
	uint16 noise_reached;

	/* Which companies have a statue? */
	CompanyMask statues;

	/* Company ratings as well as a mask that determines which companies have a rating. */
	CompanyMask have_ratings;
	uint8 unwanted[MAX_COMPANIES]; ///< how many months companies aren't wanted by towns (bribe)
	CompanyByte exclusivity;       ///< which company has exclusivity
	uint8 exclusive_counter;       ///< months till the exclusivity expires
	int16 ratings[MAX_COMPANIES];

	/* Maximum amount of passengers and mail that can be transported. */
	uint32 max_pass;
	uint32 max_mail;
	uint32 new_max_pass;
	uint32 new_max_mail;
	uint32 act_pass;
	uint32 act_mail;
	uint32 new_act_pass;
	uint32 new_act_mail;

	/* Amount of passengers that were transported. */
	byte pct_pass_transported;
	byte pct_mail_transported;

	/* Amount of food and paper that was transported. Actually a bit mask would be enough. */
	uint16 act_food;
	uint16 act_water;
	uint16 new_act_food;
	uint16 new_act_water;

	/* Time until we rebuild a house. */
	uint16 time_until_rebuild;

	/* When to grow town next time. */
	uint16 grow_counter;
	int16 growth_rate;

	/* Fund buildings program in action? */
	byte fund_buildings_months;

	/* Fund road reconstruction in action? */
	byte road_build_months;

	/* If this is a larger town, and should grow more quickly. */
	bool larger_town;
	TownLayoutByte layout; ///< town specific road layout

	PartOfSubsidyByte part_of_subsidy; ///< NOSAVE: is this town a source/destination of a subsidy?

	/* NOSAVE: UpdateTownRadius updates this given the house count. */
	uint32 squared_town_zone_radius[HZB_END];

	/* NOSAVE: The number of each type of building in the town. */
	BuildingCounts<uint16> building_counts;

	/**
	 * Creates a new town
	 */
	Town(TileIndex tile = INVALID_TILE) : xy(tile) { }

	/** Destroy the town */
	~Town();

	void InitializeLayout(TownLayout layout);

	/** Calculate the max town noise
	 * The value is counted using the population divided by the content of the
	 * entry in town_noise_population corespondig to the town's tolerance.
	 * To this result, we add 3, which is the noise of the lowest airport.
	 * So user can at least buld that airport
	 * @return the maximum noise level the town will tolerate */
	inline uint16 MaxTownNoise() const
	{
		if (this->population == 0) return 0; // no population? no noise

		return ((this->population / _settings_game.economy.town_noise_population[_settings_game.difficulty.town_council_tolerance]) + 3);
	}

	void UpdateVirtCoord();

	static FORCEINLINE Town *GetByTile(TileIndex tile)
	{
		return Town::Get(GetTownIndex(tile));
	}

	static Town *GetRandom();
	static void PostDestructor(size_t index);
};

uint32 GetWorldPopulation();

void UpdateAllTownVirtCoords();
void InitializeTown();
void ShowTownViewWindow(TownID town);
void ExpandTown(Town *t);

enum TownRatingCheckType {
	ROAD_REMOVE         = 0,
	TUNNELBRIDGE_REMOVE = 1,
	TOWN_RATING_CHECK_TYPE_COUNT,
};

/** This is the number of ticks between towns being processed for building new
 * houses or roads. This value originally came from the size of the town array
 * in TTD. */
static const byte TOWN_GROWTH_FREQUENCY = 70;

/** This enum is used in conjonction with town->flags.
 * IT simply states what bit is used for.
 * It is pretty unrealistic (IMHO) to only have one church/stadium
 * per town, NO MATTER the population of it.
 * And there are 5 more bits available on flags...
 */
enum {
	TOWN_IS_FUNDED      = 0,   ///< Town has received some funds for
	TOWN_HAS_CHURCH     = 1,   ///< There can be only one church by town.
	TOWN_HAS_STADIUM    = 2    ///< There can be only one stadium by town.
};

bool CheckforTownRating(DoCommandFlag flags, Town *t, TownRatingCheckType type);


TileIndexDiff GetHouseNorthPart(HouseID &house);

Town *CalcClosestTownFromTile(TileIndex tile, uint threshold = UINT_MAX);

#define FOR_ALL_TOWNS_FROM(var, start) FOR_ALL_ITEMS_FROM(Town, town_index, var, start)
#define FOR_ALL_TOWNS(var) FOR_ALL_TOWNS_FROM(var, 0)

void ResetHouses();

void ClearTownHouse(Town *t, TileIndex tile);
void UpdateTownMaxPass(Town *t);
void UpdateTownRadius(Town *t);
CommandCost CheckIfAuthorityAllowsNewStation(TileIndex tile, DoCommandFlag flags);
Town *ClosestTownFromTile(TileIndex tile, uint threshold);
void ChangeTownRating(Town *t, int add, int max, DoCommandFlag flags);
HouseZonesBits GetTownRadiusGroup(const Town *t, TileIndex tile);
void SetTownRatingTestMode(bool mode);
uint GetMaskOfTownActions(int *nump, CompanyID cid, const Town *t);
bool GenerateTowns(TownLayout layout);


/** Town actions of a company. */
enum TownActions {
	TACT_NONE             = 0x00, ///< Empty action set.

	TACT_ADVERTISE_SMALL  = 0x01, ///< Small advertising campaign.
	TACT_ADVERTISE_MEDIUM = 0x02, ///< Medium advertising campaign.
	TACT_ADVERTISE_LARGE  = 0x04, ///< Large advertising campaign.
	TACT_ROAD_REBUILD     = 0x08, ///< Rebuild the roads.
	TACT_BUILD_STATUE     = 0x10, ///< Build a statue.
	TACT_FOUND_BUILDINGS  = 0x20, ///< Found new buildings.
	TACT_BUY_RIGHTS       = 0x40, ///< Buy exclusive transport rights.
	TACT_BRIBE            = 0x80, ///< Try to bribe the counsil.

	TACT_COUNT            = 8,    ///< Number of available town actions.

	TACT_ADVERTISE        = TACT_ADVERTISE_SMALL | TACT_ADVERTISE_MEDIUM | TACT_ADVERTISE_LARGE, ///< All possible advertising actions.
	TACT_CONSTRUCTION     = TACT_ROAD_REBUILD | TACT_BUILD_STATUE | TACT_FOUND_BUILDINGS,        ///< All possible construction actions.
	TACT_FUNDS            = TACT_BUY_RIGHTS | TACT_BRIBE,                                        ///< All possible funding actions.
	TACT_ALL              = TACT_ADVERTISE | TACT_CONSTRUCTION | TACT_FUNDS,                     ///< All possible actions.
};
DECLARE_ENUM_AS_BIT_SET(TownActions);

extern const byte _town_action_costs[TACT_COUNT];
extern TownID _new_town_id;

/**
 * Calculate a hash value from a tile position
 *
 * @param x The X coordinate
 * @param y The Y coordinate
 * @return The hash of the tile
 */
static inline uint TileHash(uint x, uint y)
{
	uint hash = x >> 4;
	hash ^= x >> 6;
	hash ^= y >> 4;
	hash -= y >> 6;
	return hash;
}

/**
 * Get the last two bits of the TileHash
 *  from a tile position.
 *
 * @see TileHash()
 * @param x The X coordinate
 * @param y The Y coordinate
 * @return The last two bits from hash of the tile
 */
static inline uint TileHash2Bit(uint x, uint y)
{
	return GB(TileHash(x, y), 0, 2);
}

#endif /* TOWN_H */