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"

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#include "tile_cmd.h"

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#include "core/alloc_func.hpp"

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#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,

    54

	&_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

	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

/**

   119

 * Determines height at given coordinate of a slope

   120

 * @param x x coordinate

   121

 * @param y y coordinate

   122

 * @param corners slope to examine

   123

 * @return height of given point of given slope

   124

 */

   125

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

   126

{

   127

	if (IsHalftileSlope(corners)) {

   128

		switch (GetHalftileSlopeCorner(corners)) {

   129

			case CORNER_W:

   130

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

   131

				break;

   132

   133

			case CORNER_S:

   134

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

   135

				break;

   136

   137

			case CORNER_E:

   138

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

   139

				break;

   140

   141

			case CORNER_N:

   142

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

   143

				break;

   144

   145

			default: NOT_REACHED();

   146

		}

   147

	}

   148

   149

	int z = 0;

   150

   151

	switch (RemoveHalftileSlope(corners)) {

   152

		case SLOPE_W:

   153

			if (x - y >= 0) {

   154

				z = (x - y) >> 1;

   155

			}

   156

			break;

   157

   158

		case SLOPE_S:

   159

			y ^= 0xF;

   160

			if ((x - y) >= 0) {

   161

				z = (x - y) >> 1;

   162

			}

   163

			break;

   164

   165

		case SLOPE_SW:

   166

			z = (x >> 1) + 1;

   167

			break;

   168

   169

		case SLOPE_E:

   170

			if (y - x >= 0) {

   171

				z = (y - x) >> 1;

   172

			}

   173

			break;

   174

   175

		case SLOPE_EW:

   176

		case SLOPE_NS:

   177

		case SLOPE_ELEVATED:

   178

			z = 4;

   179

			break;

   180

   181

		case SLOPE_SE:

   182

			z = (y >> 1) + 1;

   183

			break;

   184

   185

		case SLOPE_WSE:

   186

			z = 8;

   187

			y ^= 0xF;

   188

			if (x - y < 0) {

   189

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

   190

			}

   191

			break;

   192

   193

		case SLOPE_N:

   194

			y ^= 0xF;

   195

			if (y - x >= 0) {

   196

				z = (y - x) >> 1;

   197

			}

   198

			break;

   199

   200

		case SLOPE_NW:

   201

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

   202

			break;

   203

   204

		case SLOPE_NWS:

   205

			z = 8;

   206

			if (x - y < 0) {

   207

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

   208

			}

   209

			break;

   210

   211

		case SLOPE_NE:

   212

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

   213

			break;

   214

   215

		case SLOPE_ENW:

   216

			z = 8;

   217

			y ^= 0xF;

   218

			if (y - x < 0) {

   219

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

   220

			}

   221

			break;

   222

   223

		case SLOPE_SEN:

   224

			z = 8;

   225

			if (y - x < 0) {

   226

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

   227

			}

   228

			break;

   229

   230

		case SLOPE_STEEP_S:

   231

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

   232

			break;

   233

   234

		case SLOPE_STEEP_W:

   235

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

   236

			break;

   237

   238

		case SLOPE_STEEP_N:

   239

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

   240

			break;

   241

   242

		case SLOPE_STEEP_E:

   243

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

   244

			break;

   245

   246

		default: break;

   247

	}

   248

   249

	return z;

   250

}

   251

   252

uint GetSlopeZ(int x, int y)

   253

{

   254

	TileIndex tile = TileVirtXY(x, y);

   255

   256

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

   257

}

   258

   259

/**

   260

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

   261

 *

   262

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

   263

 *

   264

 * @param tileh The slope.

   265

 * @param corner The corner.

   266

 * @return Z position of corner relative to TileZ.

   267

 */

   268

int GetSlopeZInCorner(Slope tileh, Corner corner)

   269

{

   270

	assert(!IsHalftileSlope(tileh));

   271

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

   272

}

   273

   274

/**

   275

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

   276

 *

   277

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

   278

 *

   279

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

   280

 *

   281

 * @param tileh The slope of the tile.

   282

 * @param edge The edge of interest.

   283

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

   284

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

   285

 */

   286

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

   287

{

   288

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

   289

		/*    corner     |          steep slope

   290

		 *  z1      z2   |       z1             z2        */

   291

		{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

   293

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

   294

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

   295

	};

   296

   297

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

   298

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

   299

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

   300

   301

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

   302

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

   303

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

   304

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

   305

}

   306

   307

/**

   308

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

   309

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

   310

 *

   311

 * @param tile The tile of interest.

   312

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

   313

 * @return The slope on top of the foundation.

   314

 */

   315

Slope GetFoundationSlope(TileIndex tile, uint* z)

   316

{

   317

	Slope tileh = GetTileSlope(tile, z);

   318

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

   319

	uint z_inc = ApplyFoundationToSlope(f, &tileh);

   320

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

   321

	return tileh;

   322

}

   323

   324

   325

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

   326

{

   327

	uint z;

   328

   329

	int z_W_here = z_here;

   330

	int z_N_here = z_here;

   331

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

   332

   333

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

   334

	int z_W = z;

   335

	int z_N = z;

   336

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

   337

   338

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

   339

}

   340

   341

   342

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

   343

{

   344

	uint z;

   345

   346

	int z_E_here = z_here;

   347

	int z_N_here = z_here;

   348

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

   349

   350

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

   351

	int z_E = z;

   352

	int z_N = z;

   353

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

   354

   355

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

   356

}

   357

   358

   359

void DrawFoundation(TileInfo *ti, Foundation f)

   360

{

   361

	if (!IsFoundation(f)) return;

   362

   363

	/* Two part foundations must be drawn separately */

   364

	assert(f != FOUNDATION_STEEP_BOTH);

   365

   366

	uint sprite_block = 0;

   367

	uint z;

   368

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

   369

   370

	/* Select the needed block of foundations sprites

   371

	 * Block 0: Walls at NW and NE edge

   372

	 * Block 1: Wall  at        NE edge

   373

	 * Block 2: Wall  at NW        edge

   374

	 * Block 3: No walls at NW or NE edge

   375

	 */

   376

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

   377

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

   378

   379

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

   380

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

   381

	SpriteID inclined_base = SPR_SLOPES_VIRTUAL_BASE + SPR_SLOPES_INCLINED_OFFSET + sprite_block * SPR_TRKFOUND_BLOCK_SIZE;

   382

	SpriteID halftile_base = SPR_HALFTILE_FOUNDATION_BASE + sprite_block * SPR_HALFTILE_BLOCK_SIZE;

   383

   384

	if (IsSteepSlope(ti->tileh)) {

   385

		if (!IsNonContinuousFoundation(f)) {

   386

			/* Lower part of foundation */

   387

			AddSortableSpriteToDraw(

   388

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

   389

			);

   390

		}

   391

   392

		Corner highest_corner = GetHighestSlopeCorner(ti->tileh);

   393

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

   394

   395

		if (IsInclinedFoundation(f)) {

   396

			/* inclined foundation */

   397

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

   398

   399

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

   400

			OffsetGroundSprite(31, 9);

   401

		} else if (f == FOUNDATION_STEEP_LOWER) {

   402

			/* one corner raised */

   403

			OffsetGroundSprite(31, 1);

   404

		} else {

   405

			/* halftile foundation */

   406

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

   407

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

   408

   409

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

   410

			OffsetGroundSprite(31, 9);

   411

		}

   412

	} else {

   413

		if (IsLeveledFoundation(f)) {

   414

			/* leveled foundation */

   415

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

   416

			OffsetGroundSprite(31, 1);

   417

		} else if (IsNonContinuousFoundation(f)) {

   418

			/* halftile foundation */

   419

			Corner halftile_corner = GetHalftileFoundationCorner(f);

   420

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

   421

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

   422

   423

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

   424

			OffsetGroundSprite(31, 9);

   425

		} else if (IsSpecialRailFoundation(f)) {

   426

			/* anti-zig-zag foundation */

   427

			SpriteID spr;

   428

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

   429

				/* half of leveled foundation under track corner */

   430

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

   431

			} else {

   432

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

   433

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

   434

			}

   435

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

   436

			OffsetGroundSprite(31, 9);

   437

		} else {

   438

			/* inclined foundation */

   439

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

   440

   441

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

   442

			OffsetGroundSprite(31, 9);

   443

		}

   444

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

   445

	}

   446

}

   447

   448

void DoClearSquare(TileIndex tile)

   449

{

   450

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

   451

	MarkTileDirtyByTile(tile);

   452

}

   453

   454

/** Returns information about trackdirs and signal states.

   455

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

   456

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

   457

 * @param tile tile to get info about

   458

 * @param mode transport type

   459

 * @param sub_mode for TRANSPORT_ROAD, roadtypes to check

   460

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

   461

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

   462

 */

   463

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

   464

{

   465

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

   466

}

   467

   468

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

   469

{

   470

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

   471

}

   472

   473

void GetAcceptedCargo(TileIndex tile, AcceptedCargo ac)

   474

{

   475

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

   476

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

   477

}

   478

   479

void AnimateTile(TileIndex tile)

   480

{

   481

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

   482

}

   483

   484

void ClickTile(TileIndex tile)

   485

{

   486

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

   487

}

   488

   489

void GetTileDesc(TileIndex tile, TileDesc *td)

   490

{

   491

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