1

/* $Id$ */

     2

     3

#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "bridge_map.h"

     6

#include "heightmap.h"

     7

#include "clear_map.h"

     8

#include "player.h"

     9

#include "spritecache.h"

    10

#include "table/sprites.h"

    11

#include <stdarg.h>

    13

#include "command_func.h"

    14

#include "landscape.h"

    15

#include "variables.h"

    16

#include "void_map.h"

    17

#include "water_map.h"

    18

#include "tgp.h"

    19

#include "genworld.h"

    20

#include "tile_cmd.h"

    21

#include "core/alloc_func.hpp"

    22

#include "fios.h"

    23

#include "window_func.h"

    24

#include "functions.h"

    25

#include "date_func.h"

    26

#include "vehicle_func.h"

    27

    28

extern const TileTypeProcs

    29

	_tile_type_clear_procs,

    30

	_tile_type_rail_procs,

    31

	_tile_type_road_procs,

    32

	_tile_type_town_procs,

    33

	_tile_type_trees_procs,

    34

	_tile_type_station_procs,

    35

	_tile_type_water_procs,

    36

	_tile_type_dummy_procs,

    37

	_tile_type_industry_procs,

    38

	_tile_type_tunnelbridge_procs,

    39

	_tile_type_unmovable_procs;

    40

    41

const TileTypeProcs * const _tile_type_procs[16] = {

    42

	&_tile_type_clear_procs,

    43

	&_tile_type_rail_procs,

    44

	&_tile_type_road_procs,

    45

	&_tile_type_town_procs,

    46

	&_tile_type_trees_procs,

    47

	&_tile_type_station_procs,

    48

	&_tile_type_water_procs,

    49

	&_tile_type_dummy_procs,

    50

	&_tile_type_industry_procs,

    51

	&_tile_type_tunnelbridge_procs,

    52

	&_tile_type_unmovable_procs,

    53

};

    54

    55

/* landscape slope => sprite */

    56

const byte _tileh_to_sprite[32] = {

    57

	0, 1, 2, 3, 4, 5, 6,  7, 8, 9, 10, 11, 12, 13, 14, 0,

    58

	0, 0, 0, 0, 0, 0, 0, 16, 0, 0,  0, 17,  0, 15, 18, 0,

    59

};

    60

    61

SnowLine *_snow_line = NULL;

    62

    63

/**

    64

 * Applys a foundation to a slope.

    65

 *

    66

 * @pre      Foundation and slope must be valid combined.

    67

 * @param f  The #Foundation.

    68

 * @param s  The #Slope to modify.

    69

 * @return   Increment to the tile Z coordinate.

    70

 */

    71

uint ApplyFoundationToSlope(Foundation f, Slope *s)

    72

{

    73

    74

	if (!IsFoundation(f)) return 0;

    75

    76

	if (IsLeveledFoundation(f)) {

    77

		*s = SLOPE_FLAT;

    78

		return TILE_HEIGHT;

    79

	}

    80

    81

	if (f != FOUNDATION_STEEP_BOTH && IsNonContinuousFoundation(f)) {

    82

		*s = HalftileSlope(*s, GetHalftileFoundationCorner(f));

    83

		return 0;

    84

	}

    85

    86

	if (IsSpecialRailFoundation(f)) {

    87

		*s = SlopeWithThreeCornersRaised(OppositeCorner(GetRailFoundationCorner(f)));

    88

		return 0;

    89

	}

    90

    91

	uint dz = IsSteepSlope(*s) ? TILE_HEIGHT : 0;

    92

	Corner highest_corner = GetHighestSlopeCorner(*s);

    93

    94

	switch (f) {

    95

		case FOUNDATION_INCLINED_X:

    96

			*s = (((highest_corner == CORNER_W) || (highest_corner == CORNER_S)) ? SLOPE_SW : SLOPE_NE);

    97

			break;

    98

    99

		case FOUNDATION_INCLINED_Y:

   100

			*s = (((highest_corner == CORNER_S) || (highest_corner == CORNER_E)) ? SLOPE_SE : SLOPE_NW);

   101

			break;

   102

   103

		case FOUNDATION_STEEP_LOWER:

   104

			*s = SlopeWithOneCornerRaised(highest_corner);

   105

			break;

   106

   107

		case FOUNDATION_STEEP_BOTH:

   108

			*s = HalftileSlope(SlopeWithOneCornerRaised(highest_corner), highest_corner);

   109

			break;

   110

   111

		default: NOT_REACHED();

   112

	}

   113

	return dz;

   114

}

   115

   116

   117

uint GetPartialZ(int x, int y, Slope corners)

   118

{

   119

	if (IsHalftileSlope(corners)) {

   120

		switch (GetHalftileSlopeCorner(corners)) {

   121

			case CORNER_W:

   122

				if (x - y >= 0) return GetSlopeMaxZ(corners);

   123

				break;

   124

   125

			case CORNER_S:

   126

				if (x - (y ^ 0xF) >= 0) return GetSlopeMaxZ(corners);

   127

				break;

   128

   129

			case CORNER_E:

   130

				if (y - x >= 0) return GetSlopeMaxZ(corners);

   131

				break;

   132

   133

			case CORNER_N:

   134

				if ((y ^ 0xF) - x >= 0) return GetSlopeMaxZ(corners);

   135

				break;

   136

   137

			default: NOT_REACHED();

   138

		}

   139

	}

   140

   141

	int z = 0;

   142

   143

	switch (corners & ~SLOPE_HALFTILE_MASK) {

   144

	case SLOPE_W:

   145

		if (x - y >= 0)

   146

			z = (x - y) >> 1;

   147

		break;

   148

   149

	case SLOPE_S:

   150

		y ^= 0xF;

   151

		if ( (x - y) >= 0)

   152

			z = (x - y) >> 1;

   153

		break;

   154

   155

	case SLOPE_SW:

   156

		z = (x >> 1) + 1;

   157

		break;

   158

   159

	case SLOPE_E:

   160

		if (y - x >= 0)

   161

			z = (y - x) >> 1;

   162

		break;

   163

   164

	case SLOPE_EW:

   165

	case SLOPE_NS:

   166

	case SLOPE_ELEVATED:

   167

		z = 4;

   168

		break;

   169

   170

	case SLOPE_SE:

   171

		z = (y >> 1) + 1;

   172

		break;

   173

   174

	case SLOPE_WSE:

   175

		z = 8;

   176

		y ^= 0xF;

   177

		if (x - y < 0)

   178

			z += (x - y) >> 1;

   179

		break;

   180

   181

	case SLOPE_N:

   182

		y ^= 0xF;

   183

		if (y - x >= 0)

   184

			z = (y - x) >> 1;

   185

		break;

   186

   187

	case SLOPE_NW:

   188

		z = (y ^ 0xF) >> 1;

   189

		break;

   190

   191

	case SLOPE_NWS:

   192

		z = 8;

   193

		if (x - y < 0)

   194

			z += (x - y) >> 1;

   195

		break;

   196

   197

	case SLOPE_NE:

   198

		z = (x ^ 0xF) >> 1;

   199

		break;

   200

   201

	case SLOPE_ENW:

   202

		z = 8;

   203

		y ^= 0xF;

   204

		if (y - x < 0)

   205

			z += (y - x) >> 1;

   206

		break;

   207

   208

	case SLOPE_SEN:

   209

		z = 8;

   210

		if (y - x < 0)

   211

			z += (y - x) >> 1;

   212

		break;

   213

   214

	case SLOPE_STEEP_S:

   215

		z = 1 + ((x + y) >> 1);

   216

		break;

   217

   218

	case SLOPE_STEEP_W:

   219

		z = 1 + ((x + (y ^ 0xF)) >> 1);

   220

		break;

   221

   222

	case SLOPE_STEEP_N:

   223

		z = 1 + (((x ^ 0xF) + (y ^ 0xF)) >> 1);

   224

		break;

   225

   226

	case SLOPE_STEEP_E:

   227

		z = 1 + (((x ^ 0xF) + y) >> 1);

   228

		break;

   229

   230

		default: break;

   231

	}

   232

   233

	return z;

   234

}

   235

   236

uint GetSlopeZ(int x, int y)

   237

{

   238

	TileIndex tile = TileVirtXY(x, y);

   239

   240

	return _tile_type_procs[GetTileType(tile)]->get_slope_z_proc(tile, x, y);

   241

}

   242

   243

/**

   244

 * Determine the Z height of a corner relative to TileZ.

   245

 *

   246

 * @pre The slope must not be a halftile slope.

   247

 *

   248

 * @param tileh The slope.

   249

 * @param corner The corner.

   250

 * @return Z position of corner relative to TileZ.

   251

 */

   252

int GetSlopeZInCorner(Slope tileh, Corner corner)

   253

{

   254

	assert(!IsHalftileSlope(tileh));

   255

	static const int _corner_slopes[4][2] = {

   256

		{ SLOPE_W, SLOPE_STEEP_W }, { SLOPE_S, SLOPE_STEEP_S }, { SLOPE_E, SLOPE_STEEP_E }, { SLOPE_N, SLOPE_STEEP_N }

   257

	};

   258

	return ((tileh & _corner_slopes[corner][0]) != 0 ? TILE_HEIGHT : 0) + (tileh == _corner_slopes[corner][1] ? TILE_HEIGHT : 0);

   259

}

   260

   261

/**

   262

 * Determine the Z height of the corners of a specific tile edge

   263

 *

   264

 * @note If a tile has a non-continuous halftile foundation, a corner can have different heights wrt. it's edges.

   265

 *

   266

 * @pre z1 and z2 must be initialized (typ. with TileZ). The corner heights just get added.

   267

 *

   268

 * @param tileh The slope of the tile.

   269

 * @param edge The edge of interest.

   270

 * @param z1 Gets incremented by the height of the first corner of the edge. (near corner wrt. the camera)

   271

 * @param z2 Gets incremented by the height of the second corner of the edge. (far corner wrt. the camera)

   272

 */

   273

void GetSlopeZOnEdge(Slope tileh, DiagDirection edge, int *z1, int *z2)

   274

{

   275

	static const Slope corners[4][4] = {

   276

		/*    corner     |          steep slope

   277

		 *  z1      z2   |       z1             z2        */

   278

		{SLOPE_E, SLOPE_N, SLOPE_STEEP_E, SLOPE_STEEP_N}, // DIAGDIR_NE, z1 = E, z2 = N

   279

		{SLOPE_S, SLOPE_E, SLOPE_STEEP_S, SLOPE_STEEP_E}, // DIAGDIR_SE, z1 = S, z2 = E

   280

		{SLOPE_S, SLOPE_W, SLOPE_STEEP_S, SLOPE_STEEP_W}, // DIAGDIR_SW, z1 = S, z2 = W

   281

		{SLOPE_W, SLOPE_N, SLOPE_STEEP_W, SLOPE_STEEP_N}, // DIAGDIR_NW, z1 = W, z2 = N

   282

	};

   283

   284

	int halftile_test = (IsHalftileSlope(tileh) ? SlopeWithOneCornerRaised(GetHalftileSlopeCorner(tileh)) : 0);

   285

	if (halftile_test == corners[edge][0]) *z2 += TILE_HEIGHT; // The slope is non-continuous in z2. z2 is on the upper side.

   286

	if (halftile_test == corners[edge][1]) *z1 += TILE_HEIGHT; // The slope is non-continuous in z1. z1 is on the upper side.

   287

   288

	if ((tileh & corners[edge][0]) != 0) *z1 += TILE_HEIGHT; // z1 is raised

   289

	if ((tileh & corners[edge][1]) != 0) *z2 += TILE_HEIGHT; // z2 is raised

   290

	if ((tileh & ~SLOPE_HALFTILE_MASK) == corners[edge][2]) *z1 += TILE_HEIGHT; // z1 is highest corner of a steep slope

   291

	if ((tileh & ~SLOPE_HALFTILE_MASK) == corners[edge][3]) *z2 += TILE_HEIGHT; // z2 is highest corner of a steep slope

   292

}

   293

   294

static Slope GetFoundationSlope(TileIndex tile, uint* z)

   295

{

   296

	Slope tileh = GetTileSlope(tile, z);

   297

	Foundation f = _tile_type_procs[GetTileType(tile)]->get_foundation_proc(tile, tileh);

   298

	*z += ApplyFoundationToSlope(f, &tileh);

   299

	return tileh;

   300

}

   301

   302

   303

static bool HasFoundationNW(TileIndex tile, Slope slope_here, uint z_here)

   304

{

   305

	uint z;

   306

   307

	int z_W_here = z_here;

   308

	int z_N_here = z_here;

   309

	GetSlopeZOnEdge(slope_here, DIAGDIR_NW, &z_W_here, &z_N_here);

   310

   311

	Slope slope = GetFoundationSlope(TILE_ADDXY(tile, 0, -1), &z);

   312

	int z_W = z;

   313

	int z_N = z;

   314

	GetSlopeZOnEdge(slope, DIAGDIR_SE, &z_W, &z_N);

   315

   316

	return (z_N_here > z_N) || (z_W_here > z_W);

   317

}

   318

   319

   320

static bool HasFoundationNE(TileIndex tile, Slope slope_here, uint z_here)

   321

{

   322

	uint z;

   323

   324

	int z_E_here = z_here;

   325

	int z_N_here = z_here;

   326

	GetSlopeZOnEdge(slope_here, DIAGDIR_NE, &z_E_here, &z_N_here);

   327

   328

	Slope slope = GetFoundationSlope(TILE_ADDXY(tile, -1, 0), &z);

   329

	int z_E = z;

   330

	int z_N = z;

   331

	GetSlopeZOnEdge(slope, DIAGDIR_SW, &z_E, &z_N);

   332

   333

	return (z_N_here > z_N) || (z_E_here > z_E);

   334

}

   335

   336

   337

void DrawFoundation(TileInfo *ti, Foundation f)

   338

{

   339

	if (!IsFoundation(f)) return;

   340

   341

	/* Two part foundations must be drawn separately */

   342

	assert(f != FOUNDATION_STEEP_BOTH);

   343

   344

	uint sprite_block = 0;

   345

	uint z;

   346

	Slope slope = GetFoundationSlope(ti->tile, &z);

   347

   348

	/* Select the needed block of foundations sprites

   349

	 * Block 0: Walls at NW and NE edge

   350

	 * Block 1: Wall  at        NE edge

   351

	 * Block 2: Wall  at NW        edge

   352

	 * Block 3: No walls at NW or NE edge

   353

	 */

   354

	if (!HasFoundationNW(ti->tile, slope, z)) sprite_block += 1;

   355

	if (!HasFoundationNE(ti->tile, slope, z)) sprite_block += 2;

   356

   357

	/* Use the original slope sprites if NW and NE borders should be visible */

   358

	SpriteID leveled_base = (sprite_block == 0 ? (int)SPR_FOUNDATION_BASE : (SPR_SLOPES_VIRTUAL_BASE + sprite_block * SPR_TRKFOUND_BLOCK_SIZE));

   359

	SpriteID inclined_base = SPR_SLOPES_VIRTUAL_BASE + SPR_SLOPES_INCLINED_OFFSET + sprite_block * SPR_TRKFOUND_BLOCK_SIZE;

   360

	SpriteID halftile_base = SPR_HALFTILE_FOUNDATION_BASE + sprite_block * SPR_HALFTILE_BLOCK_SIZE;

   361

   362

	if (IsSteepSlope(ti->tileh)) {

   363

		if (!IsNonContinuousFoundation(f)) {

   364

			/* Lower part of foundation */

   365

			AddSortableSpriteToDraw(

   366

				leveled_base + (ti->tileh & ~SLOPE_STEEP), PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z

   367

			);

   368

		}

   369

   370

		Corner highest_corner = GetHighestSlopeCorner(ti->tileh);

   371

		ti->z += ApplyFoundationToSlope(f, &ti->tileh);

   372

   373

		if (IsInclinedFoundation(f)) {

   374

			/* inclined foundation */

   375

			byte inclined = highest_corner * 2 + (f == FOUNDATION_INCLINED_Y ? 1 : 0);

   376

   377

			AddSortableSpriteToDraw(inclined_base + inclined, PAL_NONE, ti->x, ti->y, 16, 16, 1, ti->z);

   378

			OffsetGroundSprite(31, 9);

   379

		} else if (f == FOUNDATION_STEEP_LOWER) {

   380

			/* one corner raised */

   381

			OffsetGroundSprite(31, 1);

   382

		} else {

   383

			/* halftile foundation */

   384

			int x_bb = (((highest_corner == CORNER_W) || (highest_corner == CORNER_S)) ? 8 : 0);

   385

			int y_bb = (((highest_corner == CORNER_S) || (highest_corner == CORNER_E)) ? 8 : 0);

   386

   387

			AddSortableSpriteToDraw(halftile_base + highest_corner, PAL_NONE, ti->x + x_bb, ti->y + y_bb, 8, 8, 7, ti->z + TILE_HEIGHT);

   388

			OffsetGroundSprite(31, 9);

   389

		}

   390

	} else {

   391

		if (IsLeveledFoundation(f)) {

   392

			/* leveled foundation */

   393

			AddSortableSpriteToDraw(leveled_base + ti->tileh, PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);

   394

			OffsetGroundSprite(31, 1);

   395

		} else if (IsNonContinuousFoundation(f)) {

   396

			/* halftile foundation */

   397

			Corner halftile_corner = GetHalftileFoundationCorner(f);

   398

			int x_bb = (((halftile_corner == CORNER_W) || (halftile_corner == CORNER_S)) ? 8 : 0);

   399

			int y_bb = (((halftile_corner == CORNER_S) || (halftile_corner == CORNER_E)) ? 8 : 0);

   400

   401

			AddSortableSpriteToDraw(halftile_base + halftile_corner, PAL_NONE, ti->x + x_bb, ti->y + y_bb, 8, 8, 7, ti->z);

   402

			OffsetGroundSprite(31, 9);

   403

		} else if (IsSpecialRailFoundation(f)) {

   404

			/* anti-zig-zag foundation */

   405

			SpriteID spr;

   406

			if (ti->tileh == SLOPE_NS || ti->tileh == SLOPE_EW) {

   407

				/* half of leveled foundation under track corner */

   408

				spr = leveled_base + SlopeWithThreeCornersRaised(GetRailFoundationCorner(f));

   409

			} else {

   410

				/* tile-slope = sloped along X/Y, foundation-slope = three corners raised */

   411

				spr = inclined_base + 2 * GetRailFoundationCorner(f) + ((ti->tileh == SLOPE_SW || ti->tileh == SLOPE_NE) ? 1 : 0);

   412

			}

   413

			AddSortableSpriteToDraw(spr, PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);

   414

			OffsetGroundSprite(31, 9);

   415

		} else {

   416

			/* inclined foundation */

   417

			byte inclined = GetHighestSlopeCorner(ti->tileh) * 2 + (f == FOUNDATION_INCLINED_Y ? 1 : 0);

   418

   419

			AddSortableSpriteToDraw(inclined_base + inclined, PAL_NONE, ti->x, ti->y, 16, 16, 1, ti->z);

   420

			OffsetGroundSprite(31, 9);

   421

		}

   422

		ti->z += ApplyFoundationToSlope(f, &ti->tileh);

   423

	}

   424

}

   425

   426

void DoClearSquare(TileIndex tile)

   427

{

   428

	MakeClear(tile, CLEAR_GRASS, _generating_world ? 3 : 0);

   429

	MarkTileDirtyByTile(tile);

   430

}

   431

   432

uint32 GetTileTrackStatus(TileIndex tile, TransportType mode, uint sub_mode)

   433

{

   434

	return _tile_type_procs[GetTileType(tile)]->get_tile_track_status_proc(tile, mode, sub_mode);

   435

}

   436

   437

void ChangeTileOwner(TileIndex tile, PlayerID old_player, PlayerID new_player)

   438

{

   439

	_tile_type_procs[GetTileType(tile)]->change_tile_owner_proc(tile, old_player, new_player);

   440

}

   441

   442

void GetAcceptedCargo(TileIndex tile, AcceptedCargo ac)

   443

{

   444

	memset(ac, 0, sizeof(AcceptedCargo));

   445

	_tile_type_procs[GetTileType(tile)]->get_accepted_cargo_proc(tile, ac);

   446

}

   447

   448

void AnimateTile(TileIndex tile)

   449

{

   450

	_tile_type_procs[GetTileType(tile)]->animate_tile_proc(tile);

   451

}

   452

   453

void ClickTile(TileIndex tile)

   454

{

   455

	_tile_type_procs[GetTileType(tile)]->click_tile_proc(tile);

   456

}

   457

   458

void GetTileDesc(TileIndex tile, TileDesc *td)

   459

{

   460

	_tile_type_procs[GetTileType(tile)]->get_tile_desc_proc(tile, td);

   461

}

   462

   463

/**

   464

 * Has a snow line table already been loaded.

   465

 * @return true if the table has been loaded already.

   466

 */

   467

bool IsSnowLineSet(void)

   468

{

   469

	return _snow_line != NULL;

   470

}

   471

   472

/**

   473

 * Set a variable snow line, as loaded from a newgrf file.

   474

 * @param table the 12 * 32 byte table containing the snowline for each day

   475

 */

   476

void SetSnowLine(byte table[SNOW_LINE_MONTHS][SNOW_LINE_DAYS])

   477

{

   478

	_snow_line = CallocT<SnowLine>(1);

   479

	memcpy(_snow_line->table, table, sizeof(_snow_line->table));

   480

   481

	for (uint i = 0; i < SNOW_LINE_MONTHS; i++) {

   482

		for (uint j = 0; j < SNOW_LINE_DAYS; j++) {

   483

			_snow_line->highest_value = max(_snow_line->highest_value, table[i][j]);

   484

		}

   485

	}

   486

}

   487

   488

/**

   489

 * Get the current snow line, either variable or static.

   490

 * @return the snow line height.

   491

 */

   492

byte GetSnowLine(void)