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"

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#include "command_func.h"

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#include "landscape.h"

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#include "variables.h"

    14

#include "void_map.h"

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#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"

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#include "water.h"

    27

    28

#include "table/sprites.h"

    29

    30

extern const TileTypeProcs

    31

	_tile_type_clear_procs,

    32

	_tile_type_rail_procs,

    33

	_tile_type_road_procs,

    34

	_tile_type_town_procs,

    35

	_tile_type_trees_procs,

    36

	_tile_type_station_procs,

    37

	_tile_type_water_procs,

    38

	_tile_type_dummy_procs,

    39

	_tile_type_industry_procs,

    40

	_tile_type_tunnelbridge_procs,

    41

	_tile_type_unmovable_procs;

    42

    43

const TileTypeProcs * const _tile_type_procs[16] = {

    44

	&_tile_type_clear_procs,

    45

	&_tile_type_rail_procs,

    46

	&_tile_type_road_procs,

    47

	&_tile_type_town_procs,

    48

	&_tile_type_trees_procs,

    49

	&_tile_type_station_procs,

    50

	&_tile_type_water_procs,

    51

	&_tile_type_dummy_procs,

    52

	&_tile_type_industry_procs,

    53

	&_tile_type_tunnelbridge_procs,

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	&_tile_type_unmovable_procs,

    55

};

    56

    57

/* landscape slope => sprite */

    58

const byte _tileh_to_sprite[32] = {

    59

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

    60

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

    61

};

    62

    63

SnowLine *_snow_line = NULL;

    64

    65

/**

    66

 * Applys a foundation to a slope.

    67

 *

    68

 * @pre      Foundation and slope must be valid combined.

    69

 * @param f  The #Foundation.

    70

 * @param s  The #Slope to modify.

    71

 * @return   Increment to the tile Z coordinate.

    72

 */

    73

uint ApplyFoundationToSlope(Foundation f, Slope *s)

    74

{

    75

    76

	if (!IsFoundation(f)) return 0;

    77

    78

	if (IsLeveledFoundation(f)) {

    79

		*s = SLOPE_FLAT;

    80

		return TILE_HEIGHT;

    81

	}

    82

    83

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

    84

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

    85

		return 0;

    86

	}

    87

    88

	if (IsSpecialRailFoundation(f)) {

    89

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

    90

		return 0;

    91

	}

    92

    93

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

    94

	Corner highest_corner = GetHighestSlopeCorner(*s);

    95

    96

	switch (f) {

    97

		case FOUNDATION_INCLINED_X:

    98

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

    99

			break;

   100

   101

		case FOUNDATION_INCLINED_Y:

   102

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

   103

			break;

   104

   105

		case FOUNDATION_STEEP_LOWER:

   106

			*s = SlopeWithOneCornerRaised(highest_corner);

   107

			break;

   108

   109

		case FOUNDATION_STEEP_BOTH:

   110

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

   111

			break;

   112

   113

		default: NOT_REACHED();

   114

	}

   115

	return dz;

   116

}

   117

   118

   119

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

   120

{

   121

	if (IsHalftileSlope(corners)) {

   122

		switch (GetHalftileSlopeCorner(corners)) {

   123

			case CORNER_W:

   124

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

   125

				break;

   126

   127

			case CORNER_S:

   128

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

   129

				break;

   130

   131

			case CORNER_E:

   132

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

   133

				break;

   134

   135

			case CORNER_N:

   136

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

   137

				break;

   138

   139

			default: NOT_REACHED();

   140

		}

   141

	}

   142

   143

	int z = 0;

   144

   145

	switch (RemoveHalftileSlope(corners)) {

   146

	case SLOPE_W:

   147

		if (x - y >= 0)

   148

			z = (x - y) >> 1;

   149

		break;

   150

   151

	case SLOPE_S:

   152

		y ^= 0xF;

   153

		if ( (x - y) >= 0)

   154

			z = (x - y) >> 1;

   155

		break;

   156

   157

	case SLOPE_SW:

   158

		z = (x >> 1) + 1;

   159

		break;

   160

   161

	case SLOPE_E:

   162

		if (y - x >= 0)

   163

			z = (y - x) >> 1;

   164

		break;

   165

   166

	case SLOPE_EW:

   167

	case SLOPE_NS:

   168

	case SLOPE_ELEVATED:

   169

		z = 4;

   170

		break;

   171

   172

	case SLOPE_SE:

   173

		z = (y >> 1) + 1;

   174

		break;

   175

   176

	case SLOPE_WSE:

   177

		z = 8;

   178

		y ^= 0xF;

   179

		if (x - y < 0)

   180

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

   181

		break;

   182

   183

	case SLOPE_N:

   184

		y ^= 0xF;

   185

		if (y - x >= 0)

   186

			z = (y - x) >> 1;

   187

		break;

   188

   189

	case SLOPE_NW:

   190

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

   191

		break;

   192

   193

	case SLOPE_NWS:

   194

		z = 8;

   195

		if (x - y < 0)

   196

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

   197

		break;

   198

   199

	case SLOPE_NE:

   200

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

   201

		break;

   202

   203

	case SLOPE_ENW:

   204

		z = 8;

   205

		y ^= 0xF;

   206

		if (y - x < 0)

   207

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

   208

		break;

   209

   210

	case SLOPE_SEN:

   211

		z = 8;

   212

		if (y - x < 0)

   213

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

   214

		break;

   215

   216

	case SLOPE_STEEP_S:

   217

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

   218

		break;

   219

   220

	case SLOPE_STEEP_W:

   221

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

   222

		break;

   223

   224

	case SLOPE_STEEP_N:

   225

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

   226

		break;

   227

   228

	case SLOPE_STEEP_E:

   229

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

   230

		break;

   231

   232

		default: break;

   233

	}

   234

   235

	return z;

   236

}

   237

   238

uint GetSlopeZ(int x, int y)

   239

{

   240

	TileIndex tile = TileVirtXY(x, y);

   241

   242

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

   243

}

   244

   245

/**

   246

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

   247

 *

   248

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

   249

 *

   250

 * @param tileh The slope.

   251

 * @param corner The corner.

   252

 * @return Z position of corner relative to TileZ.

   253

 */

   254

int GetSlopeZInCorner(Slope tileh, Corner corner)

   255

{

   256

	assert(!IsHalftileSlope(tileh));

   257

	return ((tileh & SlopeWithOneCornerRaised(corner)) != 0 ? TILE_HEIGHT : 0) + (tileh == SteepSlope(corner) ? TILE_HEIGHT : 0);

   258

}

   259

   260

/**

   261

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

   262

 *

   263

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

   264

 *

   265

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

   266

 *

   267

 * @param tileh The slope of the tile.

   268

 * @param edge The edge of interest.

   269

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

   270

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

   271

 */

   272

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

   273

{

   274

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

   275

		/*    corner     |          steep slope

   276

		 *  z1      z2   |       z1             z2        */

   277

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

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

   279

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

   280

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

   281

	};

   282

   283

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

   284

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

   285

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

   286

   287

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

   288

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

   289

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

   290

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

   291

}

   292

   293

/**

   294

 * Get slope of a tile on top of a (possible) foundation

   295

 * If a tile does not have a foundation, the function returns the same as GetTileSlope.

   296

 *

   297

 * @param tile The tile of interest.

   298

 * @param z returns the z of the foundation slope. (Can be NULL, if not needed)

   299

 * @return The slope on top of the foundation.

   300

 */

   301

Slope GetFoundationSlope(TileIndex tile, uint* z)

   302

{

   303

	Slope tileh = GetTileSlope(tile, z);

   304

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

   305

	uint z_inc = ApplyFoundationToSlope(f, &tileh);

   306

	if (z != NULL) *z += z_inc;

   307

	return tileh;

   308

}

   309

   310

   311

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

   312

{

   313

	uint z;

   314

   315

	int z_W_here = z_here;

   316

	int z_N_here = z_here;

   317

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

   318

   319

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

   320

	int z_W = z;

   321

	int z_N = z;

   322

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

   323

   324

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

   325

}

   326

   327

   328

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

   329

{

   330

	uint z;

   331

   332

	int z_E_here = z_here;

   333

	int z_N_here = z_here;

   334

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

   335

   336

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

   337

	int z_E = z;

   338

	int z_N = z;

   339

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

   340

   341

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

   342

}

   343

   344

   345

void DrawFoundation(TileInfo *ti, Foundation f)

   346

{

   347

	if (!IsFoundation(f)) return;

   348

   349

	/* Two part foundations must be drawn separately */

   350

	assert(f != FOUNDATION_STEEP_BOTH);

   351

   352

	uint sprite_block = 0;

   353

	uint z;

   354

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

   355

   356

	/* Select the needed block of foundations sprites

   357

	 * Block 0: Walls at NW and NE edge

   358

	 * Block 1: Wall  at        NE edge

   359

	 * Block 2: Wall  at NW        edge

   360

	 * Block 3: No walls at NW or NE edge

   361

	 */

   362

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

   363

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

   364

   365

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

   366

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

   367

	SpriteID inclined_base = SPR_SLOPES_VIRTUAL_BASE + SPR_SLOPES_INCLINED_OFFSET + sprite_block * SPR_TRKFOUND_BLOCK_SIZE;

   368

	SpriteID halftile_base = SPR_HALFTILE_FOUNDATION_BASE + sprite_block * SPR_HALFTILE_BLOCK_SIZE;

   369

   370

	if (IsSteepSlope(ti->tileh)) {

   371

		if (!IsNonContinuousFoundation(f)) {

   372

			/* Lower part of foundation */

   373

			AddSortableSpriteToDraw(

   374

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

   375

			);

   376

		}

   377

   378

		Corner highest_corner = GetHighestSlopeCorner(ti->tileh);

   379

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

   380

   381

		if (IsInclinedFoundation(f)) {

   382

			/* inclined foundation */

   383

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

   384

   385

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

   386

			OffsetGroundSprite(31, 9);

   387

		} else if (f == FOUNDATION_STEEP_LOWER) {

   388

			/* one corner raised */

   389

			OffsetGroundSprite(31, 1);

   390

		} else {

   391

			/* halftile foundation */

   392

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

   393

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

   394

   395

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

   396

			OffsetGroundSprite(31, 9);

   397

		}

   398

	} else {

   399

		if (IsLeveledFoundation(f)) {

   400

			/* leveled foundation */

   401

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

   402

			OffsetGroundSprite(31, 1);

   403

		} else if (IsNonContinuousFoundation(f)) {

   404

			/* halftile foundation */

   405

			Corner halftile_corner = GetHalftileFoundationCorner(f);

   406

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

   407

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

   408

   409

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

   410

			OffsetGroundSprite(31, 9);

   411

		} else if (IsSpecialRailFoundation(f)) {

   412

			/* anti-zig-zag foundation */

   413

			SpriteID spr;

   414

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

   415

				/* half of leveled foundation under track corner */

   416

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

   417

			} else {

   418

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

   419

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

   420

			}

   421

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

   422

			OffsetGroundSprite(31, 9);

   423

		} else {

   424

			/* inclined foundation */

   425

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

   426

   427

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

   428

			OffsetGroundSprite(31, 9);

   429

		}

   430

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

   431

	}

   432

}

   433

   434

void DoClearSquare(TileIndex tile)

   435

{

   436

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

   437

	MarkTileDirtyByTile(tile);

   438

}

   439

   440

/** Returns information about trackdirs and signal states.

   441

 * If there is any trackbit at 'side', return all trackdirbits.

   442

 * For TRANSPORT_ROAD, return no trackbits if there is no roadbit (of given subtype) at given side.

   443

 * @param tile tile to get info about

   444

 * @param mode transport type

   445

 * @param sub_mode for TRANSPORT_ROAD, roadtypes to check

   446

 * @param side side we are entering from, INVALID_DIAGDIR to return all trackbits

   447

 * @return trackdirbits and other info depending on 'mode'

   448

 */

   449

TrackStatus GetTileTrackStatus(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)

   450

{

   451

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

   452

}

   453

   454

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

   455

{

   456

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

   457

}

   458

   459

void GetAcceptedCargo(TileIndex tile, AcceptedCargo ac)

   460

{

   461

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

   462

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

   463

}

   464

   465

void AnimateTile(TileIndex tile)

   466

{

   467

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

   468

}

   469

   470

void ClickTile(TileIndex tile)

   471

{

   472

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

   473

}

   474

   475

void GetTileDesc(TileIndex tile, TileDesc *td)

   476

{

   477

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

   478

}

   479

   480

/**

   481

 * Has a snow line table already been loaded.

   482

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

   483

 */

   484

bool IsSnowLineSet(void)

   485

{

   486

	return _snow_line != NULL;

   487

}

   488

   489

/**

   490

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

   491

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

   492

 */