1

/* $Id$ */

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     3

#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "bridge_map.h"

     6

#include "heightmap.h"

     7

#include "clear_map.h"

     8

#include "spritecache.h"

     9

#include <stdarg.h>

    10

#include "viewport_func.h"

    11

#include "command_func.h"

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#include "landscape.h"

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#include "variables.h"

    14

#include "void_map.h"

    15

#include "water_map.h"

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#include "tgp.h"

    17

#include "genworld.h"

    18

#include "tile_cmd.h"

    19

#include "core/alloc_func.hpp"

    20

#include "fios.h"

    21

#include "window_func.h"

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#include "functions.h"

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#include "date_func.h"

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#include "vehicle_func.h"

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#include "settings_type.h"

    26

    27

#include "table/sprites.h"

    28

    29

extern const TileTypeProcs

    30

	_tile_type_clear_procs,

    31

	_tile_type_rail_procs,

    32

	_tile_type_road_procs,

    33

	_tile_type_town_procs,

    34

	_tile_type_trees_procs,

    35

	_tile_type_station_procs,

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	_tile_type_water_procs,

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	_tile_type_dummy_procs,

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	_tile_type_industry_procs,

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	_tile_type_tunnelbridge_procs,

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	_tile_type_unmovable_procs;

    41

    42

const TileTypeProcs * const _tile_type_procs[16] = {

    43

	&_tile_type_clear_procs,

    44

	&_tile_type_rail_procs,

    45

	&_tile_type_road_procs,

    46

	&_tile_type_town_procs,

    47

	&_tile_type_trees_procs,

    48

	&_tile_type_station_procs,

    49

	&_tile_type_water_procs,

    50

	&_tile_type_dummy_procs,

    51

	&_tile_type_industry_procs,

    52

	&_tile_type_tunnelbridge_procs,

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	&_tile_type_unmovable_procs,

    54

};

    55

    56

/* landscape slope => sprite */

    57

const byte _tileh_to_sprite[32] = {

    58

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

    59

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

    60

};

    61

    62

SnowLine *_snow_line = NULL;

    63

    64

/**

    65

 * Applys a foundation to a slope.

    66

 *

    67

 * @pre      Foundation and slope must be valid combined.

    68

 * @param f  The #Foundation.

    69

 * @param s  The #Slope to modify.

    70

 * @return   Increment to the tile Z coordinate.

    71

 */

    72

uint ApplyFoundationToSlope(Foundation f, Slope *s)

    73

{

    74

    75

	if (!IsFoundation(f)) return 0;

    76

    77

	if (IsLeveledFoundation(f)) {

    78

		*s = SLOPE_FLAT;

    79

		return TILE_HEIGHT;

    80

	}

    81

    82

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

    83

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

    84

		return 0;

    85

	}

    86

    87

	if (IsSpecialRailFoundation(f)) {

    88

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

    89

		return 0;

    90

	}

    91

    92

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

    93

	Corner highest_corner = GetHighestSlopeCorner(*s);

    94

    95

	switch (f) {

    96

		case FOUNDATION_INCLINED_X:

    97

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

    98

			break;

    99

   100

		case FOUNDATION_INCLINED_Y:

   101

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

   102

			break;

   103

   104

		case FOUNDATION_STEEP_LOWER:

   105

			*s = SlopeWithOneCornerRaised(highest_corner);

   106

			break;

   107

   108

		case FOUNDATION_STEEP_BOTH:

   109

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

   110

			break;

   111

   112

		default: NOT_REACHED();

   113

	}

   114

	return dz;

   115

}

   116

   117

   118

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

   119

{

   120

	if (IsHalftileSlope(corners)) {

   121

		switch (GetHalftileSlopeCorner(corners)) {

   122

			case CORNER_W:

   123

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

   124

				break;

   125

   126

			case CORNER_S:

   127

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

   128

				break;

   129

   130

			case CORNER_E:

   131

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

   132

				break;

   133

   134

			case CORNER_N:

   135

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

   136

				break;

   137

   138

			default: NOT_REACHED();

   139

		}

   140

	}

   141

   142

	int z = 0;

   143

   144

	switch (corners & ~SLOPE_HALFTILE_MASK) {

   145

	case SLOPE_W:

   146

		if (x - y >= 0)

   147

			z = (x - y) >> 1;

   148

		break;

   149

   150

	case SLOPE_S:

   151

		y ^= 0xF;

   152

		if ( (x - y) >= 0)

   153

			z = (x - y) >> 1;

   154

		break;

   155

   156

	case SLOPE_SW:

   157

		z = (x >> 1) + 1;

   158

		break;

   159

   160

	case SLOPE_E:

   161

		if (y - x >= 0)

   162

			z = (y - x) >> 1;

   163

		break;

   164

   165

	case SLOPE_EW:

   166

	case SLOPE_NS:

   167

	case SLOPE_ELEVATED:

   168

		z = 4;

   169

		break;

   170

   171

	case SLOPE_SE:

   172

		z = (y >> 1) + 1;

   173

		break;

   174

   175

	case SLOPE_WSE:

   176

		z = 8;

   177

		y ^= 0xF;

   178

		if (x - y < 0)

   179

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

   180

		break;

   181

   182

	case SLOPE_N:

   183

		y ^= 0xF;

   184

		if (y - x >= 0)

   185

			z = (y - x) >> 1;

   186

		break;

   187

   188

	case SLOPE_NW:

   189

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

   190

		break;

   191

   192

	case SLOPE_NWS:

   193

		z = 8;

   194

		if (x - y < 0)

   195

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

   196

		break;

   197

   198

	case SLOPE_NE:

   199

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

   200

		break;

   201

   202

	case SLOPE_ENW:

   203

		z = 8;

   204

		y ^= 0xF;

   205

		if (y - x < 0)

   206

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

   207

		break;

   208

   209

	case SLOPE_SEN:

   210

		z = 8;

   211

		if (y - x < 0)

   212

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

   213

		break;

   214

   215

	case SLOPE_STEEP_S:

   216

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

   217

		break;

   218

   219

	case SLOPE_STEEP_W:

   220

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

   221

		break;

   222

   223

	case SLOPE_STEEP_N:

   224

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

   225

		break;

   226

   227

	case SLOPE_STEEP_E:

   228

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

   229

		break;

   230

   231

		default: break;

   232

	}

   233

   234

	return z;

   235

}

   236

   237

uint GetSlopeZ(int x, int y)

   238

{

   239

	TileIndex tile = TileVirtXY(x, y);

   240

   241

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

   242

}

   243

   244

/**

   245

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

   246

 *

   247

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

   248

 *

   249

 * @param tileh The slope.

   250

 * @param corner The corner.

   251

 * @return Z position of corner relative to TileZ.

   252

 */

   253

int GetSlopeZInCorner(Slope tileh, Corner corner)

   254

{

   255

	assert(!IsHalftileSlope(tileh));

   256

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

   257

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

   258

	};

   259

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

   260

}

   261

   262

/**

   263

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

   264

 *

   265

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

   266

 *

   267

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

   268

 *

   269

 * @param tileh The slope of the tile.

   270

 * @param edge The edge of interest.

   271

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

   272

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

   273

 */

   274

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

   275

{

   276

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

   277

		/*    corner     |          steep slope

   278

		 *  z1      z2   |       z1             z2        */

   279

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

   280

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

   281

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

   282

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

   283

	};

   284

   285

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

   286

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

   287

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

   288

   289

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

   290

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

   291

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

   292

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

   293

}

   294

   295

static Slope GetFoundationSlope(TileIndex tile, uint* z)

   296

{

   297

	Slope tileh = GetTileSlope(tile, z);

   298

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

   299

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

   300

	return tileh;

   301

}

   302

   303

   304

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

   305

{

   306

	uint z;

   307

   308

	int z_W_here = z_here;

   309

	int z_N_here = z_here;

   310

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

   311

   312

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

   313

	int z_W = z;

   314

	int z_N = z;

   315

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

   316

   317

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

   318

}

   319

   320

   321

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

   322

{

   323

	uint z;

   324

   325

	int z_E_here = z_here;

   326

	int z_N_here = z_here;

   327

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

   328

   329

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

   330

	int z_E = z;

   331

	int z_N = z;

   332

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

   333

   334

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

   335

}

   336

   337

   338

void DrawFoundation(TileInfo *ti, Foundation f)

   339

{

   340

	if (!IsFoundation(f)) return;

   341

   342

	/* Two part foundations must be drawn separately */

   343

	assert(f != FOUNDATION_STEEP_BOTH);

   344

   345

	uint sprite_block = 0;

   346

	uint z;

   347

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

   348

   349

	/* Select the needed block of foundations sprites

   350

	 * Block 0: Walls at NW and NE edge

   351

	 * Block 1: Wall  at        NE edge

   352

	 * Block 2: Wall  at NW        edge

   353

	 * Block 3: No walls at NW or NE edge

   354

	 */

   355

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

   356

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

   357

   358

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

   359

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

   360

	SpriteID inclined_base = SPR_SLOPES_VIRTUAL_BASE + SPR_SLOPES_INCLINED_OFFSET + sprite_block * SPR_TRKFOUND_BLOCK_SIZE;

   361

	SpriteID halftile_base = SPR_HALFTILE_FOUNDATION_BASE + sprite_block * SPR_HALFTILE_BLOCK_SIZE;

   362

   363

	if (IsSteepSlope(ti->tileh)) {

   364

		if (!IsNonContinuousFoundation(f)) {

   365

			/* Lower part of foundation */

   366

			AddSortableSpriteToDraw(

   367

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

   368

			);

   369

		}

   370

   371

		Corner highest_corner = GetHighestSlopeCorner(ti->tileh);

   372

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

   373

   374

		if (IsInclinedFoundation(f)) {

   375

			/* inclined foundation */

   376

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

   377

   378

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

   379

			OffsetGroundSprite(31, 9);

   380

		} else if (f == FOUNDATION_STEEP_LOWER) {

   381

			/* one corner raised */

   382

			OffsetGroundSprite(31, 1);

   383

		} else {

   384

			/* halftile foundation */

   385

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

   386

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

   387

   388

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

   389

			OffsetGroundSprite(31, 9);

   390

		}

   391

	} else {

   392

		if (IsLeveledFoundation(f)) {

   393

			/* leveled foundation */

   394

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

   395

			OffsetGroundSprite(31, 1);

   396

		} else if (IsNonContinuousFoundation(f)) {

   397

			/* halftile foundation */

   398

			Corner halftile_corner = GetHalftileFoundationCorner(f);

   399

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

   400

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

   401

   402

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

   403

			OffsetGroundSprite(31, 9);

   404

		} else if (IsSpecialRailFoundation(f)) {

   405

			/* anti-zig-zag foundation */

   406

			SpriteID spr;

   407

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

   408

				/* half of leveled foundation under track corner */

   409

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

   410

			} else {

   411

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

   412

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

   413

			}

   414

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

   415

			OffsetGroundSprite(31, 9);

   416

		} else {

   417

			/* inclined foundation */

   418

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

   419

   420

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

   421

			OffsetGroundSprite(31, 9);

   422

		}

   423

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

   424

	}

   425

}

   426

   427

void DoClearSquare(TileIndex tile)

   428

{

   429

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

   430

	MarkTileDirtyByTile(tile);

   431

}

   432

   433

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

   434

{

   435

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

   436

}

   437

   438

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

   439

{

   440

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

   441

}

   442

   443

void GetAcceptedCargo(TileIndex tile, AcceptedCargo ac)

   444

{

   445

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

   446

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

   447

}

   448

   449

void AnimateTile(TileIndex tile)

   450

{

   451

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

   452

}

   453

   454

void ClickTile(TileIndex tile)

   455

{

   456

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

   457

}

   458

   459

void GetTileDesc(TileIndex tile, TileDesc *td)

   460

{

   461

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

   462

}

   463

   464

/**

   465

 * Has a snow line table already been loaded.

   466

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

   467

 */

   468

bool IsSnowLineSet(void)

   469

{

   470

	return _snow_line != NULL;

   471

}

   472

   473

/**

   474

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

   475

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

   476

 */

   477

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

   478

{

   479

	_snow_line = CallocT<SnowLine>(1);

   480

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

   481

   482

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

   483

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

   484

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

   485

		}

   486

	}

   487

}

   488

   489

/**

   490

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

   491

 * @return the snow line height.

   492

 */