1

#include "stdafx.h"

     2

#include "ttd.h"

     3

#include "viewport.h"

     4

#include "town.h"

     5

#include "command.h"

     6

#include "pathfind.h"

     7

#include "gfx.h"

     8

#include "industry.h"

     9

#include "station.h"

    10

#include "player.h"

    11

#include "news.h"

    12

#include "saveload.h"

    13

#include "economy.h"

    14

#include "gui.h"

    15

    21

// Local

    22

static int _grow_town_result;

    23

    24

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

    25

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

    26

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

    27

    28

typedef struct DrawTownTileStruct {

    29

	uint32 sprite_1;

    30

	uint32 sprite_2;

    31

    32

	byte subtile_x:4;

    33

	byte subtile_y:4;

    34

	byte width:4;

    35

	byte height:4;

    36

	byte dz;

    37

	byte proc;

    38

} DrawTownTileStruct;

    39

    40

#include "table/town_land.h"

    41

    42

    43

static void TownDrawTileProc1(TileInfo *ti)

    44

{

    45

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

    46

}

    47

    48

typedef void TownDrawTileProc(TileInfo *ti);

    49

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

    50

	TownDrawTileProc1

    51

};

    52

    53

    54

static void DrawTile_Town(TileInfo *ti)

    55

{

    56

	const DrawTownTileStruct *dcts;

    57

	byte z;

    58

	uint32 image;

    59

    60

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

    61

	{

    62

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

    63

		byte gfx   = _map2[ti->tile];

    64

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

    65

		uint variant;

    66

		variant  = ti->x >> 4;

    67

		variant ^= ti->x >> 6;

    68

		variant ^= ti->y >> 4;

    69

		variant -= ti->y >> 6;

    70

		variant &= 3;

    71

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

    72

	}

    73

    74

	z = ti->z;

    75

    76

	/* Add bricks below the house? */

    77

	if (ti->tileh) {

    78

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

    79

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

    80

		z += 8;

    81

	} else {

    82

		/* Else draw regular ground */

    83

		DrawGroundSprite(dcts->sprite_1);

    84

	}

    85

    86

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

    87

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

    88

		if (!(_display_opt & DO_TRANS_BUILDINGS))

    89

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

    90

    91

		AddSortableSpriteToDraw(image,

    92

			ti->x + dcts->subtile_x,

    93

			ti->y + dcts->subtile_y,

    94

			dcts->width + 1,

    95

			dcts->height + 1,

    96

			dcts->dz,

    97

			z);

    98

    99

		if (!(_display_opt & DO_TRANS_BUILDINGS))

   100

			return;

   101

	}

   102

   103

	{

   104

		int proc;

   105

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

   106

			_town_draw_tile_procs[proc](ti);

   107

	}

   108

}

   109

   110

static uint GetSlopeZ_Town(TileInfo *ti)

   111

{

   112

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

   113

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

   114

	return (uint16) z;

   115

}

   116

   117

static uint GetSlopeTileh_Town(TileInfo *ti)

   118

{

   119

	return ti->tileh;

   120

}

   121

   122

static void AnimateTile_Town(uint tile)

   123

{

   124

	int old;

   125

	int i;

   126

	int a,b;

   127

   128

	if (_tick_counter & 3)

   129

		return;

   130

   131

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

   132

		return;

   133

   134

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

   135

		_map_owner[tile] |= 0x80;

   136

   137

		do {

   138

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

   139

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

   140

   141

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

   142

	}

   143

   144

	a = _map_owner[tile]&0x7F;

   145

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

   146

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

   147

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

   148

   149

	if (a == b) {

   150

		_map5[tile] &= 0x40;

   151

		_map_owner[tile] &= 0x7F;

   152

		DeleteAnimatedTile(tile);

   153

	}

   154

   155

	MarkTileDirtyByTile(tile);

   156

}

   157

   158

static void UpdateTownRadius(Town *t);

   159

   160

static bool IsCloseToTown(uint tile, uint dist)

   161

{

   162

	Town *t;

   163

   164

	FOR_ALL_TOWNS(t) {

   165

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

   166

			return true;

   167

	}

   168

	return false;

   169

}

   170

   171

   172

static void ChangePopulation(Town *t, int mod)

   173

{

   174

	t->population += mod;

   175

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   176

   177

	if (_town_sort_order & 2) _town_sort_dirty = true;

   178

}

   179

   180

static void MakeSingleHouseBigger(uint tile)

   181

{

   182

	byte b;

   183

   184

	assert(IS_TILETYPE(tile, MP_HOUSE));

   185

   186

	b = _map5[tile];

   187

	if (b & 0x80)

   188

		return;

   189

   190

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

   191

   192

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

   193

		return;

   194

   195

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

   196

   197

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

   198

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

   199

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

   200

	}

   201

	MarkTileDirtyByTile(tile);

   202

}

   203

   204

static void MakeTownHouseBigger(uint tile)

   205

{

   206

	uint flags = _house_more_flags[_map2[tile]];

   207

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

   208

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

   209

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

   210

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

   211

}

   212

   213

static void TileLoop_Town(uint tile)

   214

{

   215

	int house;

   216

	Town *t;

   217

	uint32 r;

   218

   219

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

   220

		MakeTownHouseBigger(tile);

   221

		return;

   222

	}

   223

   224

	house = _map2[tile];

   225

	if (_housetype_extra_flags[house] & 0x20 &&

   226

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

   227

			CHANCE16(1,2) &&

   228

			AddAnimatedTile(tile)) {

   229

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

   230

	}

   231

   232

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

   233

   234

	r = Random();

   235

   236

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

   237

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

   238

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

   239

		t->new_max_pass += amt;

   240

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

   241

		t->new_act_pass += moved;

   242

	}

   243

   244

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

   245

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

   246

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

   247

		t->new_max_mail += amt;

   248

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

   249

		t->new_act_mail += moved;

   250

	}

   251

   252

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

   253

		r>>=16;

   254

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

   255

   256

		_current_player = OWNER_TOWN;

   257

   258

		ClearTownHouse(t, tile);

   259

   260

		// rebuild with another house?

   261

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

   262

			DoBuildTownHouse(t, tile);

   263

		}

   264

   265

		_current_player = OWNER_NONE;

   266

	}

   267

}

   268

   269

static void ClickTile_Town(uint tile)

   270

{

   271

	/* not used */

   272

}

   273

   274

static int32 ClearTile_Town(uint tile, byte flags)

   275

{

   276

	int house, rating;

   277

	int32 cost;

   278

	Town *t;

   279

   280

	// safety checks

   281

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   282

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

   283

   284

	house = _map2[tile];

   285

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

   286

   287

	rating = _housetype_remove_ratingmod[house];

   288

	_cleared_town_rating += rating;

   289

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

   290

   291

	if (_current_player < MAX_PLAYERS) {

   292

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

   293

			SET_DPARAM16(0, t->index);

   294

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   295

		}

   296

	}

   297

   298

	if (flags & DC_EXEC) {

   299

		ChangeTownRating(t, -rating, -1000);

   300

		ClearTownHouse(t, tile);

   301

	}

   302

   303

	return cost;

   304

}

   305

   306

static void GetAcceptedCargo_Town(uint tile, AcceptedCargo ac)

   307

{

   308

	int type = _map2[tile];

   309

   310

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   311

	ac[CT_MAIL] = _housetype_cargo_mail[type];

   312

	ac[CT_GOODS] = _housetype_cargo_goods[type];

   313

	ac[CT_FOOD] = _housetype_cargo_food[type];

   314

}

   315

   316

static void GetTileDesc_Town(uint tile, TileDesc *td)

   317

{

   318

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

   319

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

   320

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

   321

		td->str = STR_2058_UNDER_CONSTRUCTION;

   322

	}

   323

   324

	td->owner = OWNER_TOWN;

   325

}

   326

   327

static uint32 GetTileTrackStatus_Town(uint tile, TransportType mode)

   328

{

   329

	/* not used */

   330

	return 0;

   331

}

   332

   333

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

   334

{

   335

	/* not used */

   336

}

   337

   338

   339

static const TileIndexDiff _roadblock_tileadd[4+3] = {

   340

	TILE_XY(0,-1),

   341

	TILE_XY(1,0),

   342

	TILE_XY(0,1),

   343

	TILE_XY(-1,0),

   344

   345

	// Store the first 3 elements again.

   346

	// Lets us rotate without using &3.

   347

	TILE_XY(0,-1),

   348

	TILE_XY(1,0),

   349

	TILE_XY(0,1),

   350

};

   351

   352

static void TownTickHandler(Town *t)

   353

{

   354

	if (t->flags12&1) {

   355

		int i = t->grow_counter - 1;

   356

		if (i < 0) {

   357

			if (GrowTown(t)) {

   358

				i = t->growth_rate;

   359

			} else {

   360

				i = 0;

   361

			}

   362

		}

   363

		t->grow_counter = i;

   364

	}

   365

   366

	UpdateTownRadius(t);

   367

}

   368

   369

void OnTick_Town()

   370

{

   371

	uint i;

   372

	Town *t;

   373

   374

	if (_game_mode == GM_EDITOR)

   375

		return;

   376

   377

	i = _cur_town_ctr;

   378

	t = DEREF_TOWN(i);

   379

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

   380

	_cur_town_ctr = i;

   381

   382

	if (t->xy != 0)

   383

		TownTickHandler(t);

   384

   385

}

   386

   387

static byte GetTownRoadMask(TileIndex tile)

   388

{

   389

	byte b = GetRoadBitsByTile(tile);

   390

	byte r=0;

   391

	if (b&1) r|=10;

   392

	if (b&2) r|=5;

   393

	if (b&4) r|=9;

   394

	if (b&8) r|=6;

   395

	if (b&16) r|=3;

   396

	if (b&32) r|=12;

   397

	return r;

   398

}

   399

   400

static bool IsRoadAllowedHere(uint tile, int dir)

   401

{

   402

	uint k;

   403

	uint slope;

   404

   405

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

   406

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

   407

	TILE_ASSERT(tile);

   408

   409

	for(;;) {

   410

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

   411

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

   412

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

   413

		// that place).

   414

		if (IS_TILETYPE(tile, MP_STATION))

   415

			return false;

   416

   417

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

   418

		if (GetRoadBitsByTile(tile) == 0) {

   419

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

   420

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

   421

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

   422

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

   423

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

   424

				return false;

   425

		}

   426

   427

		slope = GetTileSlope(tile, NULL);

   428

		if (slope == 0) {

   429

no_slope:

   430

			// Tile has no slope

   431

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

   432

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

   433

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

   434

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

   435

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

   436

				return false;

   437

   438

			// Otherwise allow

   439

			return true;

   440

		}

   441

   442

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

   443

		// maybe terraform some.

   444

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

   445

			uint32 r = Random();

   446

   447

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

   448

				int32 res;

   449

   450

				if (CHANCE16I(1,16,r))

   451

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

   452

					                      CMD_TERRAFORM_LAND);

   453

				else

   454

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

   455

					                      CMD_TERRAFORM_LAND);

   456

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

   457

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

   458

					goto no_slope;

   459

			}

   460

			return false;

   461

		}

   462

   463

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

   464

	}

   465

}

   466

   467

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

   468

{

   469

	int32 r;

   470

   471

	TILE_ASSERT(tile);

   472

   473

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

   474

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

   475

		return false;

   476

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

   477

	return true;

   478

}

   479

   480

static void LevelTownLand(uint tile)

   481

{

   482

	TileInfo ti;

   483

   484

	TILE_ASSERT(tile);

   485

   486

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

   487

	FindLandscapeHeightByTile(&ti, tile);

   488

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

   489

		return;

   490

   491

	// First try up, then down

   492

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

   493

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

   494

	}

   495

}

   496

   497

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

   498

   499

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

   500

{

   501

	Town *t2;

   502

	uint16 r;

   503

	int a,b,rcmd;

   504

	uint tmptile;

   505

	TileInfo ti;

   506

	int i;

   507

	int j;

   508

	uint tile = *tile_ptr;

   509

   510

	TILE_ASSERT(tile);

   511

   512

	if (mask == 0) {

   513

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

   514

		// to say that this is the last iteration.

   515

		_grow_town_result = 0;

   516

   517

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

   518

		// if not, bail out.

   519

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

   520

		if (t2 != t1)

   521