1

#include "stdafx.h"

     2

#include "ttd.h"

     3

#include "table/strings.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"

    17

    18

enum {

    19

	TOWN_HAS_CHURCH     = 0x02,

    20

	TOWN_HAS_STADIUM    = 0x04

    21

};

    22

    23

// Local

    24

static int _grow_town_result;

    25

    26

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

    27

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

    28

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

    29

    30

typedef struct DrawTownTileStruct {

    31

	uint32 sprite_1;

    32

	uint32 sprite_2;

    33

    34

	byte subtile_x:4;

    35

	byte subtile_y:4;

    36

	byte width:4;

    37

	byte height:4;

    38

	byte dz;

    39

	byte proc;

    40

} DrawTownTileStruct;

    41

    42

#include "table/town_land.h"

    43

    44

    45

static void TownDrawTileProc1(TileInfo *ti)

    46

{

    47

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

    48

}

    49

    50

typedef void TownDrawTileProc(TileInfo *ti);

    51

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

    52

	TownDrawTileProc1

    53

};

    54

    55

    56

static void DrawTile_Town(TileInfo *ti)

    57

{

    58

	const DrawTownTileStruct *dcts;

    59

	byte z;

    60

	uint32 image;

    61

    62

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

    63

	{

    64

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

    65

		byte gfx   = _map2[ti->tile];

    66

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

    67

		uint variant;

    68

		variant  = ti->x >> 4;

    69

		variant ^= ti->x >> 6;

    70

		variant ^= ti->y >> 4;

    71

		variant -= ti->y >> 6;

    72

		variant &= 3;

    73

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

    74

	}

    75

    76

	z = ti->z;

    77

    78

	/* Add bricks below the house? */

    79

	if (ti->tileh) {

    80

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

    81

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

    82

		z += 8;

    83

	} else {

    84

		/* Else draw regular ground */

    85

		DrawGroundSprite(dcts->sprite_1);

    86

	}

    87

    88

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

    89

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

    90

		if (_display_opt & DO_TRANS_BUILDINGS)

    91

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

    92

    93

		AddSortableSpriteToDraw(image,

    94

			ti->x + dcts->subtile_x,

    95

			ti->y + dcts->subtile_y,

    96

			dcts->width + 1,

    97

			dcts->height + 1,

    98

			dcts->dz,

    99

			z);

   100

   101

		if (_display_opt & DO_TRANS_BUILDINGS)

   102

			return;

   103

	}

   104

   105

	{

   106

		int proc;

   107

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

   108

			_town_draw_tile_procs[proc](ti);

   109

	}

   110

}

   111

   112

static uint GetSlopeZ_Town(TileInfo *ti)

   113

{

   114

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

   115

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

   116

	return (uint16) z;

   117

}

   118

   119

static uint GetSlopeTileh_Town(TileInfo *ti)

   120

{

   121

	return ti->tileh;

   122

}

   123

   124

static void AnimateTile_Town(uint tile)

   125

{

   126

	int old;

   127

	int i;

   128

	int a,b;

   129

   130

	if (_tick_counter & 3)

   131

		return;

   132

   133

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

   134

		return;

   135

   136

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

   137

		_map_owner[tile] |= 0x80;

   138

   139

		do {

   140

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

   141

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

   142

   143

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

   144

	}

   145

   146

	a = _map_owner[tile]&0x7F;

   147

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

   148

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

   149

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

   150

   151

	if (a == b) {

   152

		_map5[tile] &= 0x40;

   153

		_map_owner[tile] &= 0x7F;

   154

		DeleteAnimatedTile(tile);

   155

	}

   156

   157

	MarkTileDirtyByTile(tile);

   158

}

   159

   160

static void UpdateTownRadius(Town *t);

   161

   162

static bool IsCloseToTown(uint tile, uint dist)

   163

{

   164

	Town *t;

   165

   166

	FOR_ALL_TOWNS(t) {

   167

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

   168

			return true;

   169

	}

   170

	return false;

   171

}

   172

   173

   174

static void ChangePopulation(Town *t, int mod)

   175

{

   176

	t->population += mod;

   177

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   178

   179

	if (_town_sort_order & 2) _town_sort_dirty = true;

   180

}

   181

   182

static void MakeSingleHouseBigger(uint tile)

   183

{

   184

	byte b;

   185

   186

	assert(IS_TILETYPE(tile, MP_HOUSE));

   187

   188

	b = _map5[tile];

   189

	if (b & 0x80)

   190

		return;

   191

   192

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

   193

   194

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

   195

		return;

   196

   197

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

   198

   199

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

   200

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

   201

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

   202

	}

   203

	MarkTileDirtyByTile(tile);

   204

}

   205

   206

static void MakeTownHouseBigger(uint tile)

   207

{

   208

	uint flags = _house_more_flags[_map2[tile]];

   209

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

   210

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

   211

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

   212

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

   213

}

   214

   215

static void TileLoop_Town(uint tile)

   216

{

   217

	int house;

   218

	Town *t;

   219

	uint32 r;

   220

   221

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

   222

		MakeTownHouseBigger(tile);

   223

		return;

   224

	}

   225

   226

	house = _map2[tile];

   227

	if (_housetype_extra_flags[house] & 0x20 &&

   228

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

   229

			CHANCE16(1,2) &&

   230

			AddAnimatedTile(tile)) {

   231

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

   232

	}

   233

   234

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

   235

   236

	r = Random();

   237

   238

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

   239

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

   240

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

   241

		t->new_max_pass += amt;

   242

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

   243

		t->new_act_pass += moved;

   244

	}

   245

   246

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

   247

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

   248

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

   249

		t->new_max_mail += amt;

   250

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

   251

		t->new_act_mail += moved;

   252

	}

   253

   254

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

   255

		r>>=16;

   256

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

   257

   258

		_current_player = OWNER_TOWN;

   259

   260

		ClearTownHouse(t, tile);

   261

   262

		// rebuild with another house?

   263

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

   264

			DoBuildTownHouse(t, tile);

   265

		}

   266

   267

		_current_player = OWNER_NONE;

   268

	}

   269

}

   270

   271

static void ClickTile_Town(uint tile)

   272

{

   273

	/* not used */

   274

}

   275

   276

static int32 ClearTile_Town(uint tile, byte flags)

   277

{

   278

	int house, rating;

   279

	int32 cost;

   280

	Town *t;

   281

   282

	// safety checks

   283

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   284

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

   285

   286

	house = _map2[tile];

   287

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

   288

   289

	rating = _housetype_remove_ratingmod[house];

   290

	_cleared_town_rating += rating;

   291

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

   292

   293

	if (_current_player < MAX_PLAYERS) {

   294

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

   295

			SetDParam(0, t->index);

   296

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   297

		}

   298

	}

   299

   300

	if (flags & DC_EXEC) {

   301

		ChangeTownRating(t, -rating, -1000);

   302

		ClearTownHouse(t, tile);

   303

	}

   304

   305

	return cost;

   306

}

   307

   308

static void GetAcceptedCargo_Town(uint tile, AcceptedCargo ac)

   309

{

   310

	int type = _map2[tile];

   311

   312

	ac[CT_PASSENGERS] = _housetype_cargo_passengers[type];

   313

	ac[CT_MAIL] = _housetype_cargo_mail[type];

   314

	ac[CT_GOODS] = _housetype_cargo_goods[type];

   315

	ac[CT_FOOD] = _housetype_cargo_food[type];

   316

}

   317

   318

static void GetTileDesc_Town(uint tile, TileDesc *td)

   319

{

   320

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

   321

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

   322

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

   323

		td->str = STR_2058_UNDER_CONSTRUCTION;

   324

	}

   325

   326

	td->owner = OWNER_TOWN;

   327

}

   328

   329

static uint32 GetTileTrackStatus_Town(uint tile, TransportType mode)

   330

{

   331

	/* not used */

   332

	return 0;

   333

}

   334

   335

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

   336

{

   337

	/* not used */

   338

}

   339

   340

   341

static const TileIndexDiff _roadblock_tileadd[4+3] = {

   342

	TILE_XY(0,-1),

   343

	TILE_XY(1,0),

   344

	TILE_XY(0,1),

   345

	TILE_XY(-1,0),

   346

   347

	// Store the first 3 elements again.

   348

	// Lets us rotate without using &3.

   349

	TILE_XY(0,-1),

   350

	TILE_XY(1,0),

   351

	TILE_XY(0,1),

   352

};

   353

   354

static void TownTickHandler(Town *t)

   355

{

   356

	if (t->flags12&1) {

   357

		int i = t->grow_counter - 1;

   358

		if (i < 0) {

   359

			if (GrowTown(t)) {

   360

				i = t->growth_rate;

   361

			} else {

   362

				i = 0;

   363

			}

   364

		}

   365

		t->grow_counter = i;

   366

	}

   367

   368

	UpdateTownRadius(t);

   369

}

   370

   371

void OnTick_Town()

   372

{

   373

	uint i;

   374

	Town *t;

   375

   376

	if (_game_mode == GM_EDITOR)

   377

		return;

   378

   379

	i = _cur_town_ctr;

   380

	t = DEREF_TOWN(i);

   381

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

   382

	_cur_town_ctr = i;

   383

   384

	if (t->xy != 0)

   385

		TownTickHandler(t);

   386

   387

}

   388

   389

static byte GetTownRoadMask(TileIndex tile)

   390

{

   391

	byte b = GetRoadBitsByTile(tile);

   392

	byte r=0;

   393

	if (b&1) r|=10;

   394

	if (b&2) r|=5;

   395

	if (b&4) r|=9;

   396

	if (b&8) r|=6;

   397

	if (b&16) r|=3;

   398

	if (b&32) r|=12;

   399

	return r;

   400

}

   401

   402

static bool IsRoadAllowedHere(uint tile, int dir)

   403

{

   404

	uint k;

   405

	uint slope;

   406

   407

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

   408

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

   409

	TILE_ASSERT(tile);

   410

   411

	for(;;) {

   412

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

   413

		if (GetRoadBitsByTile(tile) == 0) {

   414

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

   415

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

   416

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

   417

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

   418

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

   419

				return false;

   420

		}

   421

   422

		slope = GetTileSlope(tile, NULL);

   423

		if (slope == 0) {

   424

no_slope:

   425

			// Tile has no slope

   426

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

   427

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

   428

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

   429

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

   430

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

   431

				return false;

   432

   433

			// Otherwise allow

   434

			return true;

   435

		}

   436

   437

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

   438

		// maybe terraform some.

   439

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

   440

			uint32 r = Random();

   441

   442

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

   443

				int32 res;

   444

   445

				if (CHANCE16I(1,16,r))

   446

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

   447

					                      CMD_TERRAFORM_LAND);

   448

				else

   449

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

   450

					                      CMD_TERRAFORM_LAND);

   451

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

   452

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

   453

					goto no_slope;

   454

			}

   455

			return false;

   456

		}

   457

   458

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

   459

	}

   460

}

   461

   462

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

   463

{

   464

	int32 r;

   465

   466

	TILE_ASSERT(tile);

   467

   468

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

   469

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

   470

		return false;

   471

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

   472

	return true;

   473

}

   474

   475

static void LevelTownLand(uint tile)

   476

{

   477

	TileInfo ti;

   478

   479

	TILE_ASSERT(tile);

   480

   481

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

   482

	FindLandscapeHeightByTile(&ti, tile);

   483

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

   484

		return;

   485

   486

	// First try up, then down

   487

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

   488

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

   489

	}

   490

}

   491

   492

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

   493

   494

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

   495

{

   496

	Town *t2;

   497

	uint16 r;

   498

	int a,b,rcmd;

   499

	uint tmptile;

   500

	TileInfo ti;

   501

	int i;

   502

	int j;

   503

	uint tile = *tile_ptr;

   504

   505

	TILE_ASSERT(tile);

   506

   507

	if (mask == 0) {

   508

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

   509

		// to say that this is the last iteration.

   510

		_grow_town_result = 0;

   511

   512

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

   513

		// if not, bail out.

   514

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

   515

		if (t2 != t1)

   516

			return;

   517

   518

		// Remove hills etc

   519

		LevelTownLand(tile);

   520