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

    16

// Local

    17

static int _grow_town_result;

    18

    19

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

    20

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

    21

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

    22

    23

typedef struct DrawTownTileStruct {

    24

	uint32 sprite_1;

    25

	uint32 sprite_2;

    26

    27

	byte subtile_xy;

    28

	byte width_height;

    29

	byte dz;

    30

	byte proc;

    31

} DrawTownTileStruct;

    32

    33

#include "table/town_land.h"

    34

    35

    36

static void TownDrawTileProc1(TileInfo *ti)

    37

{

    38

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

    39

}

    40

    41

typedef void TownDrawTileProc(TileInfo *ti);

    42

static TownDrawTileProc * const _town_draw_tile_procs[1] = {

    43

	TownDrawTileProc1

    44

};

    45

    46

    47

static void DrawTile_Town(TileInfo *ti)

    48

{

    49

	const DrawTownTileStruct *dcts;

    50

	byte z;

    51

	uint32 image;

    52

    53

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

    54

	{

    55

		uint hash, t;

    56

		hash  = ti->x >> 4;

    57

		hash ^= hash>>2;

    58

		hash ^= (t=(ti->y >> 4));

    59

		hash -= t>>2;

    60

		dcts = &_town_draw_tile_data[((_map2[ti->tile]<<4)|(_map3_lo[ti->tile]>>6)|((hash&3)<<2))];

    61

	}

    62

    63

	z = ti->z;

    64

    65

	/* Add bricks below the house? */

    66

	if (ti->tileh) {

    67

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

    68

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

    69

		z += 8;

    70

	} else {

    71

		/* Else draw regular ground */

    72

		DrawGroundSprite(dcts->sprite_1);

    73

	}

    74

    75

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

    76

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

    77

		if (!(_display_opt & DO_TRANS_BUILDINGS))

    78

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

    79

    80

		AddSortableSpriteToDraw(image,

    81

			ti->x | (dcts->subtile_xy>>4),

    82

			ti->y | (dcts->subtile_xy&0xF),

    83

			(dcts->width_height>>4)+1,

    84

			(dcts->width_height&0xF)+1,

    85

			dcts->dz,

    86

			z);

    87

    88

		if (!(_display_opt & DO_TRANS_BUILDINGS))

    89

			return;

    90

	}

    91

    92

	{

    93

		int proc;

    94

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

    95

			_town_draw_tile_procs[proc](ti);

    96

	}

    97

}

    98

    99

static uint GetSlopeZ_Town(TileInfo *ti)

   100

{

   101

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

   102

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

   103

	return (uint16) z;

   104

}

   105

   106

static uint GetSlopeTileh_Town(TileInfo *ti)

   107

{

   108

	return ti->tileh;

   109

}

   110

   111

static void AnimateTile_Town(uint tile)

   112

{

   113

	int old;

   114

	int i;

   115

	int a,b;

   116

   117

	if (_tick_counter & 3)

   118

		return;

   119

   120

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

   121

		return;

   122

   123

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

   124

		_map_owner[tile] |= 0x80;

   125

   126

		do {

   127

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

   128

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

   129

   130

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

   131

	}

   132

   133

	a = _map_owner[tile]&0x7F;

   134

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

   135

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

   136

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

   137

   138

	if (a == b) {

   139

		_map5[tile] &= 0x40;

   140

		_map_owner[tile] &= 0x7F;

   141

		DeleteAnimatedTile(tile);

   142

	}

   143

   144

	MarkTileDirtyByTile(tile);

   145

}

   146

   147

static void UpdateTownRadius(Town *t);

   148

   149

static bool IsCloseToTown(uint tile, uint dist)

   150

{

   151

	Town *t;

   152

   153

	FOR_ALL_TOWNS(t) {

   154

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

   155

			return true;

   156

	}

   157

	return false;

   158

}

   159

   160

   161

static void ChangePopulation(Town *t, int mod)

   162

{

   163

	t->population += mod;

   164

	InvalidateWindow(WC_TOWN_VIEW, t->index);

   165

   166

	if (_town_sort_order & 2) _town_sort_dirty = true;

   167

}

   168

   169

static void MakeSingleHouseBigger(uint tile)

   170

{

   171

	byte b;

   172

   173

	assert(IS_TILETYPE(tile, MP_HOUSE));

   174

   175

	b = _map5[tile];

   176

	if (b & 0x80)

   177

		return;

   178

   179

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

   180

   181

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

   182

		return;

   183

   184

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

   185

   186

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

   187

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

   188

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

   189

	}

   190

	MarkTileDirtyByTile(tile);

   191

}

   192

   193

static void MakeTownHouseBigger(uint tile)

   194

{

   195

	uint flags = _house_more_flags[_map2[tile]];

   196

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

   197

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

   198

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

   199

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

   200

}

   201

   202

static void TileLoop_Town(uint tile)

   203

{

   204

	int house;

   205

	Town *t;

   206

	uint32 r;

   207

   208

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

   209

		MakeTownHouseBigger(tile);

   210

		return;

   211

	}

   212

   213

	house = _map2[tile];

   214

	if (_housetype_extra_flags[house] & 0x20 &&

   215

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

   216

			CHANCE16(1,2) &&

   217

			AddAnimatedTile(tile)) {

   218

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

   219

	}

   220

   221

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

   222

   223

	r = Random();

   224

   225

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

   226

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

   227

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

   228

		t->new_max_pass += amt;

   229

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

   230

		t->new_act_pass += moved;

   231

	}

   232

   233

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

   234

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

   235

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

   236

		t->new_max_mail += amt;

   237

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

   238

		t->new_act_mail += moved;

   239

	}

   240

   241

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

   242

		r>>=16;

   243

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

   244

   245

		_current_player = OWNER_TOWN;

   246

   247

		ClearTownHouse(t, tile);

   248

   249

		// rebuild with another house?

   250

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

   251

			DoBuildTownHouse(t, tile);

   252

		}

   253

   254

		_current_player = OWNER_NONE;

   255

	}

   256

}

   257

   258

static void ClickTile_Town(uint tile)

   259

{

   260

	/* not used */

   261

}

   262

   263

static int32 ClearTile_Town(uint tile, byte flags)

   264

{

   265

	int house, rating;

   266

	int32 cost;

   267

	Town *t;

   268

   269

	// safety checks

   270

	if (!EnsureNoVehicle(tile)) return CMD_ERROR;

   271

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

   272

   273

	house = _map2[tile];

   274

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

   275

   276

	rating = _housetype_remove_ratingmod[house];

   277

	_cleared_town_rating += rating;

   278

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

   279

   280

	if (_current_player < MAX_PLAYERS) {

   281

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

   282

			SET_DPARAM16(0, t->index);

   283

			return_cmd_error(STR_2009_LOCAL_AUTHORITY_REFUSES);

   284

		}

   285

	}

   286

   287

	if (flags & DC_EXEC) {

   288

		ChangeTownRating(t, -rating, -1000);

   289

		ClearTownHouse(t, tile);

   290

	}

   291

   292

	return cost;

   293

}

   294

   295

static void GetAcceptedCargo_Town(uint tile, AcceptedCargo *ac)

   296

{

   297

	int type = _map2[tile];

   298

   299

	ac->type_1 = CT_PASSENGERS;

   300

	ac->amount_1 = _housetype_cargo_passengers[type];

   301

   302

	ac->type_2 = CT_GOODS;

   303

	ac->amount_2 = _housetype_cargo_goods[type];

   304

	if (ac->amount_2 & 0x80) {

   305

		ac->amount_2 &= 0x7F;

   306

		ac->type_2 = CT_FOOD;

   307

	}

   308

   309

	ac->type_3 = CT_MAIL;

   310

	ac->amount_3 = _housetype_cargo_mail[type];

   311

}

   312

   313

static void GetTileDesc_Town(uint tile, TileDesc *td)

   314

{

   315

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

   316

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

   317

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

   318

		td->str = STR_2058_UNDER_CONSTRUCTION;

   319

	}

   320

   321

	td->owner = OWNER_TOWN;

   322

}

   323

   324

static uint32 GetTileTrackStatus_Town(uint tile, TransportType mode)

   325

{

   326

	/* not used */

   327

	return 0;

   328

}

   329

   330

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

   331

{

   332

	/* not used */

   333

}

   334

   335

   336

static const TileIndexDiff _roadblock_tileadd[4+3] = {

   337

	TILE_XY(0,-1),

   338

	TILE_XY(1,0),

   339

	TILE_XY(0,1),

   340

	TILE_XY(-1,0),

   341

   342

	// Store the first 3 elements again.

   343

	// Lets us rotate without using &3.

   344

	TILE_XY(0,-1),

   345

	TILE_XY(1,0),

   346

	TILE_XY(0,1),

   347

};

   348

   349

static void TownTickHandler(Town *t)

   350

{

   351

	if (t->flags12&1) {

   352

		int i = t->grow_counter - 1;

   353

		if (i < 0) {

   354

			if (GrowTown(t)) {

   355

				i = t->growth_rate;

   356

			} else {

   357

				i = 0;

   358

			}

   359

		}

   360

		t->grow_counter = i;

   361

	}

   362

   363

	UpdateTownRadius(t);

   364

}

   365

   366

void OnTick_Town()

   367

{

   368

	uint i;

   369

	Town *t;

   370

   371

	if (_game_mode == GM_EDITOR)

   372

		return;

   373

   374

	i = _cur_town_ctr;

   375

	t = DEREF_TOWN(i);

   376

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

   377

	_cur_town_ctr = i;

   378

   379

	if (t->xy != 0)

   380

		TownTickHandler(t);

   381

   382

}

   383

   384

static byte GetTownRoadMask(TileIndex tile)

   385

{

   386

	byte b = GetRoadBitsByTile(tile);

   387

	byte r=0;

   388

	if (b&1) r|=10;

   389

	if (b&2) r|=5;

   390

	if (b&4) r|=9;

   391

	if (b&8) r|=6;

   392

	if (b&16) r|=3;

   393

	if (b&32) r|=12;

   394

	return r;

   395

}

   396

   397

static bool IsRoadAllowedHere(uint tile, int dir)

   398

{

   399

	uint k;

   400

	uint slope;

   401

   402

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

   403

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

   404

	TILE_ASSERT(tile);

   405

   406

	for(;;) {

   414

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

   415

		if (GetRoadBitsByTile(tile) == 0) {

   416

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

   417

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

   418

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

   419

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

   420

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

   421

				return false;

   422

		}

   423

   424

		slope = GetTileSlope(tile, NULL);

   425

		if (slope == 0) {

   426

no_slope:

   427

			// Tile has no slope

   428

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

   429

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

   430

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

   431

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

   432

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

   433

				return false;

   434

   435

			// Otherwise allow

   436

			return true;

   437

		}

   438

   439

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

   440

		// maybe terraform some.

   441

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

   442

			uint32 r = Random();

   443

   444

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

   445

				int32 res;

   446

   447

				if (CHANCE16I(1,16,r))

   448

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

   449

					                      CMD_TERRAFORM_LAND);

   450

				else

   451

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

   452

					                      CMD_TERRAFORM_LAND);

   453

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

   454

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

   455

					goto no_slope;

   456

			}

   457

			return false;

   458

		}

   459

   460

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

   461

	}

   462

}

   463

   464

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

   465

{

   466

	int32 r;

   467

   468

	TILE_ASSERT(tile);

   469

   470

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

   471

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

   472

		return false;

   473

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

   474

	return true;

   475

}

   476

   477

static void LevelTownLand(uint tile)

   478

{

   479

	TileInfo ti;

   480

   481

	TILE_ASSERT(tile);

   482

   483

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

   484

	FindLandscapeHeightByTile(&ti, tile);

   485

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

   486

		return;

   487

   488

	// First try up, then down

   489

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

   490

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

   491

	}

   492

}

   493

   494

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

   495

   496

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

   497

{

   498

	Town *t2;

   499

	uint16 r;

   500

	int a,b,rcmd;

   501

	uint tmptile;

   502

	TileInfo ti;

   503

	int i;

   504

	int j;

   505

	uint tile = *tile_ptr;

   506

   507

	TILE_ASSERT(tile);

   508

   509

	if (mask == 0) {

   510

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

   511

		// to say that this is the last iteration.

   512

		_grow_town_result = 0;

   513

   514

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

   515

		// if not, bail out.

   516

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

   517

		if (t2 != t1)

   518

			return;

   519

   520

		// Remove hills etc

   521

		LevelTownLand(tile);

   522

   523

		// Is a road allowed here?