1

#include "stdafx.h"

     2

#include "ttd.h"

     4

#include "viewport.h"

     5

#include "town.h"

     6

#include "command.h"

     7

#include "pathfind.h"

     8

#include "gfx.h"

     9

#include "industry.h"

    10

#include "station.h"

    11

#include "player.h"

    12

#include "news.h"

    13

#include "saveload.h"

    14

#include "economy.h"

    15

#include "gui.h"

    16

    17

enum {

    18

	TOWN_HAS_CHURCH     = 0x02,

    19

	TOWN_HAS_STADIUM    = 0x04

    20

};

    21

    22

// Local

    23

static int _grow_town_result;

    24

    25

static bool BuildTownHouse(Town *t, uint tile);

    26

static void ClearTownHouse(Town *t, uint tile);

    27

static void DoBuildTownHouse(Town *t, uint tile);

    28

    29

typedef struct DrawTownTileStruct {

    30

	uint32 sprite_1;

    31

	uint32 sprite_2;

    32

    33

	byte subtile_x:4;

    34

	byte subtile_y:4;

    35

	byte width:4;

    36

	byte height:4;

    37

	byte dz;

    38

	byte proc;

    39

} DrawTownTileStruct;

    40

    41

#include "table/town_land.h"

    42

    43

    44

static void TownDrawTileProc1(TileInfo *ti)

    45

{

    46

	AddChildSpriteScreen(0x5A3, 0xE, 0x3C - (_map_owner[ti->tile]&0x7F));

    47

}

    48

    49

typedef void TownDrawTileProc(TileInfo *ti);

    50

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

    51

	TownDrawTileProc1

    52

};

    53

    54

    55

static void DrawTile_Town(TileInfo *ti)

    56

{

    57

	const DrawTownTileStruct *dcts;

    58

	byte z;

    59

	uint32 image;

    60

    61

	/* Retrieve pointer to the draw town tile struct */

    62

	{

    63

		/* this "randomizes" on the (up to) 4 variants of a building */

    64

		byte gfx   = _map2[ti->tile];

    65

		byte stage = _map3_lo[ti->tile] >> 6;

    66

		uint variant;

    67

		variant  = ti->x >> 4;

    68

		variant ^= ti->x >> 6;

    69

		variant ^= ti->y >> 4;

    70

		variant -= ti->y >> 6;

    71

		variant &= 3;

    72

		dcts = &_town_draw_tile_data[gfx << 4 | variant << 2 | stage];

    73

	}

    74

    75

	z = ti->z;

    76

    77

	/* Add bricks below the house? */

    78

	if (ti->tileh) {

    79

		AddSortableSpriteToDraw(0x3DD + ti->tileh, ti->x, ti->y, 16, 16, 7, z);

    80

		AddChildSpriteScreen(dcts->sprite_1, 0x1F, 1);

    81

		z += 8;

    82

	} else {

    83

		/* Else draw regular ground */

    84

		DrawGroundSprite(dcts->sprite_1);

    85

	}

    86

    87

	/* Add a house on top of the ground? */

    88

	if ((image = dcts->sprite_2) != 0) {

    89

		if (_display_opt & DO_TRANS_BUILDINGS)

    90

			image = (image & 0x3FFF) | 0x3224000;

    91

    92

		AddSortableSpriteToDraw(image,

    93

			ti->x + dcts->subtile_x,

    94

			ti->y + dcts->subtile_y,

    95

			dcts->width + 1,

    96

			dcts->height + 1,

    97

			dcts->dz,

    98

			z);

    99

   100

		if (_display_opt & DO_TRANS_BUILDINGS)

   101

			return;

   102

	}

   103

   104

	{

   105

		int proc;

   106

		if ((proc=dcts->proc-1) >= 0 )

   107

			_town_draw_tile_procs[proc](ti);

   108

	}

   109

}

   110

   111

static uint GetSlopeZ_Town(TileInfo *ti)

   112

{

   113

	uint z = GetPartialZ(ti->x&0xF, ti->y&0xF, ti->tileh) + ti->z;

   114

	if (ti->tileh != 0) z = (z & ~7) + 4;

   115

	return (uint16) z;

   116

}

   117

   118

static uint GetSlopeTileh_Town(TileInfo *ti)

   119

{

   120

	return ti->tileh;

   121

}

   122

   123

static void AnimateTile_Town(uint tile)

   124

{

   125

	int old;

   126

	int i;

   127

	int a,b;

   128

   129

	if (_tick_counter & 3)

   130

		return;

   131

   132

	if (_map2[tile] != 4 && _map2[tile] != 5)

   133

		return;

   134

   135

	if (!((old=_map_owner[tile])&0x80)) {

   136

		_map_owner[tile] |= 0x80;

   137

   138

		do {

   139

			i = (Random()&7) - 1;

   140

		} while (i < 0 || i == 1 || i*6==old);

   141

   142

		_map5[tile] = (_map5[tile] & ~0x3F) | i;

   143

	}

   144

   145

	a = _map_owner[tile]&0x7F;

   146

	b = (_map5[tile]&0x3F) * 6;

   147

	a += (a < b) ? 1 : -1;

   148

	_map_owner[tile] = (_map_owner[tile]&0x80)|a;

   149

   150

	if (a == b) {

   151

		_map5[tile] &= 0x40;

   152

		_map_owner[tile] &= 0x7F;

   153

		DeleteAnimatedTile(tile);

   154

	}

   155

   156

	MarkTileDirtyByTile(tile);

   157

}

   158

   159

static void UpdateTownRadius(Town *t);

   160

   161

static bool IsCloseToTown(uint tile, uint dist)

   162

{

   163

	Town *t;

   164

   165

	FOR_ALL_TOWNS(t) {

   166

		if (t->xy != 0 && GetTileDist(tile, t->xy) < dist)

   167

			return true;

   168

	}

   169

	return false;

   170

}

   171

   172

   173

static void ChangePopulation(Town *t, int mod)

   174

{

   175

	t->population += mod;

   176

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   177

   178

	if (_town_sort_order & 2) _town_sort_dirty = true;

   179

}

   180

   181

static void MakeSingleHouseBigger(uint tile)

   182

{

   183

	byte b;

   184

   185

	assert(IS_TILETYPE(tile, MP_HOUSE));

   186

   187

	b = _map5[tile];

   188

	if (b & 0x80)

   189

		return;

   190

   191

	_map5[tile] = (b & 0xC0) | ((b+1)&7);

   192

   193

	if ((_map5[tile]&7) != 0)

   194

		return;

   195

   196

	_map3_lo[tile] = _map3_lo[tile] + 0x40;

   197

   198

	if ( (_map3_lo[tile] & 0xC0) == 0xC0) {

   199

		Town *t = ClosestTownFromTile(tile, (uint)-1);

   200

		ChangePopulation(t, _housetype_population[_map2[tile]]);

   201

	}

   202

	MarkTileDirtyByTile(tile);

   203

}

   204

   205

static void MakeTownHouseBigger(uint tile)

   206

{

   207

	uint flags = _house_more_flags[_map2[tile]];

   208

	if (flags & 8) MakeSingleHouseBigger(TILE_ADDXY(tile, 0, 0));

   209

	if (flags & 4) MakeSingleHouseBigger(TILE_ADDXY(tile, 0, 1));

   210

	if (flags & 2) MakeSingleHouseBigger(TILE_ADDXY(tile, 1, 0));

   211

	if (flags & 1) MakeSingleHouseBigger(TILE_ADDXY(tile, 1, 1));

   212

}

   213

   214

static void TileLoop_Town(uint tile)

   215

{

   216

	int house;

   217

	Town *t;

   218

	uint32 r;

   219

   220

	if ((_map3_lo[tile] & 0xC0) != 0xC0) {

   221

		MakeTownHouseBigger(tile);

   222

		return;

   223

	}

   224

   225

	house = _map2[tile];

   226

	if (_housetype_extra_flags[house] & 0x20 &&

   227

			!(_map5[tile] & 0x80) &&

   228

			CHANCE16(1,2) &&

   229

			AddAnimatedTile(tile)) {

   230

		_map5[tile] = (_map5[tile] & 0x40)|0x80;

   231

	}

   232

   233

	t = ClosestTownFromTile(tile, (uint)-1);

   234

   235

	r = Random();

   236

   237

	if ( (byte)r < _housetype_population[house] ) {

   238

		uint amt = ((byte)r >> 3) + 1, moved;

   239

		if (_economy.fluct <= 0) amt = (amt + 1) >> 1;

   240

		t->new_max_pass += amt;

   241

		moved = MoveGoodsToStation(tile, 1, 1, CT_PASSENGERS, amt);

   242

		t->new_act_pass += moved;

   243

	}

   244

   245

	if ( (byte)(r>>8) < _housetype_mailamount[house] ) {

   246

		uint amt = ((byte)(r>>8) >> 3) + 1, moved;

   247

		if (_economy.fluct <= 0) amt = (amt + 1) >> 1;

   248

		t->new_max_mail += amt;

   249

		moved = MoveGoodsToStation(tile, 1, 1, CT_MAIL, amt);

   250

		t->new_act_mail += moved;

   251

	}

   252

   253

	if (_house_more_flags[house]&8 && (t->flags12&1) && --t->time_until_rebuild == 0) {

   254

		r>>=16;

   255

		t->time_until_rebuild = (r & 63) + 130;

   256

   257

		_current_player = OWNER_TOWN;

   258

   259

		ClearTownHouse(t, tile);

   260

   261

		// rebuild with another house?

   262

		if ( (byte) (r >> 8) >= 12) {

   263

			DoBuildTownHouse(t, tile);

   264

		}

   265

   266

		_current_player = OWNER_NONE;

   267

	}

   268

}

   269

   270

static void ClickTile_Town(uint tile)

   271

{

   272

	/* not used */

   273

}

   274

   275

static int32 ClearTile_Town(uint tile, byte flags)

   276

{

   277

	int house, rating;

   278

	int32 cost;

   279

	Town *t;

   280

   281

	// safety checks

   282

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   283

	if (flags&DC_AUTO && !(flags&DC_AI_BUILDING)) return_cmd_error(STR_2004_BUILDING_MUST_BE_DEMOLISHED);

   284

   285

	house = _map2[tile];

   286

	cost = _price.remove_house * _housetype_remove_cost[house] >> 8;

   287

   288

	rating = _housetype_remove_ratingmod[house];

   289

	_cleared_town_rating += rating;

   290

	_cleared_town = t = ClosestTownFromTile(tile, (uint)-1);

   291

   292

	if (_current_player < MAX_PLAYERS) {

   293

		if (rating > t->ratings[_current_player] && !(flags & DC_NO_TOWN_RATING) && !_cheats.magic_bulldozer.value) {

   294

			SET_DPARAM16(0, t->index);

   295

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   296

		}

   297

	}

   298

   299

	if (flags & DC_EXEC) {

   300

		ChangeTownRating(t, -rating, -1000);

   301

		ClearTownHouse(t, tile);

   302

	}

   303

   304

	return cost;

   305

}

   306

   307

static void GetAcceptedCargo_Town(uint tile, AcceptedCargo ac)

   308

{

   309

	int type = _map2[tile];

   310

   311

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   312

	ac[CT_MAIL] = _housetype_cargo_mail[type];

   313

	ac[CT_GOODS] = _housetype_cargo_goods[type];

   314

	ac[CT_FOOD] = _housetype_cargo_food[type];

   315

}

   316

   317

static void GetTileDesc_Town(uint tile, TileDesc *td)

   318

{

   319

	td->str = _town_tile_names[_map2[tile]];

   320

	if ((_map3_lo[tile] & 0xC0) != 0xC0) {

   321

		SET_DPARAMX16(td->dparam, 0, td->str);

   322

		td->str = STR_2058_UNDER_CONSTRUCTION;

   323

	}

   324

   325

	td->owner = OWNER_TOWN;

   326

}

   327

   328

static uint32 GetTileTrackStatus_Town(uint tile, TransportType mode)

   329

{

   330

	/* not used */

   331

	return 0;

   332

}

   333

   334

static void ChangeTileOwner_Town(uint tile, byte old_player, byte new_player)

   335

{

   336

	/* not used */

   337

}

   338

   339

   340

static const TileIndexDiff _roadblock_tileadd[4+3] = {

   341

	TILE_XY(0,-1),

   342

	TILE_XY(1,0),

   343

	TILE_XY(0,1),

   344

	TILE_XY(-1,0),

   345

   346

	// Store the first 3 elements again.

   347

	// Lets us rotate without using &3.

   348

	TILE_XY(0,-1),

   349

	TILE_XY(1,0),

   350

	TILE_XY(0,1),

   351

};

   352

   353

static void TownTickHandler(Town *t)

   354

{

   355

	if (t->flags12&1) {

   356

		int i = t->grow_counter - 1;

   357

		if (i < 0) {

   358

			if (GrowTown(t)) {

   359

				i = t->growth_rate;

   360

			} else {

   361

				i = 0;

   362

			}

   363

		}

   364

		t->grow_counter = i;

   365

	}

   366

   367

	UpdateTownRadius(t);

   368

}

   369

   370

void OnTick_Town()

   371

{

   372

	uint i;

   373

	Town *t;

   374

   375

	if (_game_mode == GM_EDITOR)

   376

		return;

   377

   378

	i = _cur_town_ctr;

   379

	t = DEREF_TOWN(i);

   380

	if (++i == lengthof(_towns)) i = 0;

   381

	_cur_town_ctr = i;

   382

   383

	if (t->xy != 0)

   384

		TownTickHandler(t);

   385

   386

}

   387

   388

static byte GetTownRoadMask(TileIndex tile)

   389

{

   390

	byte b = GetRoadBitsByTile(tile);

   391

	byte r=0;

   392

	if (b&1) r|=10;

   393

	if (b&2) r|=5;

   394

	if (b&4) r|=9;

   395

	if (b&8) r|=6;

   396

	if (b&16) r|=3;

   397

	if (b&32) r|=12;

   398

	return r;

   399

}

   400

   401

static bool IsRoadAllowedHere(uint tile, int dir)

   402

{

   403

	uint k;

   404

	uint slope;

   405

   406

	// If this assertion fails, it might be because the world contains

   407

	//  land at the edges. This is not ok.

   408

	TILE_ASSERT(tile);

   409

   410

	for(;;) {

   411

		// Check if we didn't hit a station. That little roadstation

   412

		// pinkeye returns nonzero GetRoadBitsByTile(), but the road

   413

		// doesn't really go through it (nor can we extend it at

   414

		// that place).

   415

		if (IS_TILETYPE(tile, MP_STATION))

   416

			return false;

   417

   418

		// Check if there already is a road at this point?

   419

		if (GetRoadBitsByTile(tile) == 0) {

   420

			// No, try to build one in the direction.

   421

			// if that fails clear the land, and if that fails exit.

   422

			// This is to make sure that we can build a road here later.

   423

			if (DoCommandByTile(tile, (dir&1)?0xA:0x5, 0, DC_AUTO, CMD_BUILD_ROAD) == CMD_ERROR &&

   424

					DoCommandByTile(tile, 0, 0, DC_AUTO, CMD_LANDSCAPE_CLEAR) == CMD_ERROR)

   425

				return false;

   426

		}

   427

   428

		slope = GetTileSlope(tile, NULL);

   429

		if (slope == 0) {

   430

no_slope:

   431

			// Tile has no slope

   432

			// Disallow the road if any neighboring tile has a road.

   433

			if (HASBIT(GetTownRoadMask(TILE_ADD(tile, _roadblock_tileadd[dir+1])), dir^2) ||

   434

					HASBIT(GetTownRoadMask(TILE_ADD(tile, _roadblock_tileadd[dir+3])), dir^2) ||

   435

					HASBIT(GetTownRoadMask(TILE_ADD(tile, _roadblock_tileadd[dir+1] + _roadblock_tileadd[dir+2])), dir) ||

   436

					HASBIT(GetTownRoadMask(TILE_ADD(tile, _roadblock_tileadd[dir+3] + _roadblock_tileadd[dir+2])), dir))

   437

				return false;

   438

   439

			// Otherwise allow

   440

			return true;

   441

		}

   442

   443

		// If the tile is not a slope in the right direction, then

   444

		// maybe terraform some.

   445

		if ((k = (dir&1)?0xC:0x9) != slope && (k^0xF) != slope) {

   446

			uint32 r = Random();

   447

   448

			if (CHANCE16I(1,8, r) && !_generating_world) {

   449

				int32 res;

   450

   451

				if (CHANCE16I(1,16,r))

   452

					res = DoCommandByTile(tile, slope, 0, DC_EXEC | DC_AUTO | DC_NO_WATER,

   453

					                      CMD_TERRAFORM_LAND);

   454

				else

   455

					res = DoCommandByTile(tile, slope^0xF, 1, DC_EXEC | DC_AUTO | DC_NO_WATER,

   456

					                      CMD_TERRAFORM_LAND);

   457

				if (res == CMD_ERROR && CHANCE16I(1,3,r))

   458

					// We can consider building on the slope, though.

   459

					goto no_slope;

   460

			}

   461

			return false;

   462

		}

   463

   464

		tile = TILE_ADD(tile, _roadblock_tileadd[dir]);

   465

	}

   466

}

   467

   468

static bool TerraformTownTile(uint tile, int edges, int dir)

   469

{

   470

	int32 r;

   471

   472

	TILE_ASSERT(tile);

   473

   474

	r = DoCommandByTile(tile, edges, dir, DC_AUTO | DC_NO_WATER, CMD_TERRAFORM_LAND);

   475

	if (r == CMD_ERROR || r >= 126*16)

   476

		return false;

   477

	DoCommandByTile(tile, edges, dir, DC_AUTO | DC_NO_WATER | DC_EXEC, CMD_TERRAFORM_LAND);

   478

	return true;

   479

}

   480

   481

static void LevelTownLand(uint tile)

   482

{

   483

	TileInfo ti;

   484

   485

	TILE_ASSERT(tile);

   486

   487

	// Don't terraform if land is plain or if there's a house there.

   488

	FindLandscapeHeightByTile(&ti, tile);

   489

	if (ti.tileh == 0 || ti.type == MP_HOUSE)

   490

		return;

   491

   492

	// First try up, then down

   493

	if (!TerraformTownTile(tile, ~ti.tileh & 0xF, 1)) {

   494

		TerraformTownTile(tile, ti.tileh & 0xF, 0);

   495

	}

   496

}

   497

   498

#define IS_WATER_TILE(t) (IS_TILETYPE((t), MP_WATER) && _map5[(t)] == 0)

   499

   500

static void GrowTownInTile(uint *tile_ptr, uint mask, int block, Town *t1)

   501

{

   502

	Town *t2;

   503

	uint16 r;

   504

	int a,b,rcmd;

   505

	uint tmptile;

   506

	TileInfo ti;

   507

	int i;

   508

	int j;

   509

	uint tile = *tile_ptr;

   510

   511

	TILE_ASSERT(tile);

   512

   513

	if (mask == 0) {

   514

		// Tile has no road. First reset the status counter

   515

		// to say that this is the last iteration.

   516

		_grow_town_result = 0;

   517

   518

		// Then check if the tile we are at belongs to the town,

   519

		// if not, bail out.

   520

		t2 = ClosestTownFromTile(tile, (uint)-1);