1

/* $Id$ */

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     3

#include "stdafx.h"

     4

#include "openttd.h"

     5

#include "bridge_map.h"

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#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"

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#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"

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#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

#include "water.h"

    28

    29

#include "table/sprites.h"

    30

    31

extern const TileTypeProcs

    32

	_tile_type_clear_procs,

    33

	_tile_type_rail_procs,

    34

	_tile_type_road_procs,

    35

	_tile_type_town_procs,

    36

	_tile_type_trees_procs,

    37

	_tile_type_station_procs,

    38

	_tile_type_water_procs,

    39

	_tile_type_dummy_procs,

    40

	_tile_type_industry_procs,

    41

	_tile_type_tunnelbridge_procs,

    42

	_tile_type_unmovable_procs;

    43

    44

const TileTypeProcs * const _tile_type_procs[16] = {

    45

	&_tile_type_clear_procs,

    46

	&_tile_type_rail_procs,

    47

	&_tile_type_road_procs,

    48

	&_tile_type_town_procs,

    49

	&_tile_type_trees_procs,

    50

	&_tile_type_station_procs,

    51

	&_tile_type_water_procs,

    52

	&_tile_type_dummy_procs,

    53

	&_tile_type_industry_procs,

    54

	&_tile_type_tunnelbridge_procs,

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	&_tile_type_unmovable_procs,

    56

};

    57

    58

/* landscape slope => sprite */

    59

const byte _tileh_to_sprite[32] = {

    60

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

    61

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

    62

};

    63

    64

SnowLine *_snow_line = NULL;

    65

    66

/**

    67

 * Applys a foundation to a slope.

    68

 *

    69

 * @pre      Foundation and slope must be valid combined.

    70

 * @param f  The #Foundation.

    71

 * @param s  The #Slope to modify.

    72

 * @return   Increment to the tile Z coordinate.

    73

 */

    74

uint ApplyFoundationToSlope(Foundation f, Slope *s)

    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

/**

   120

 * Determines height at given coordinate of a slope

   121

 * @param x x coordinate

   122

 * @param y y coordinate

   123

 * @param corners slope to examine

   124

 * @return height of given point of given slope

   125

 */

   126

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

   127

{

   128

	if (IsHalftileSlope(corners)) {

   129

		switch (GetHalftileSlopeCorner(corners)) {

   130

			case CORNER_W:

   131

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

   132

				break;

   133

   134

			case CORNER_S:

   135

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

   136

				break;

   137

   138

			case CORNER_E:

   139

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

   140

				break;

   141

   142

			case CORNER_N:

   143

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

   144

				break;

   145

   146

			default: NOT_REACHED();

   147

		}

   148

	}

   149

   150

	int z = 0;

   151

   152

	switch (RemoveHalftileSlope(corners)) {

   153

		case SLOPE_W:

   154

			if (x - y >= 0) {

   155

				z = (x - y) >> 1;

   156

			}

   157

			break;

   158

   159

		case SLOPE_S:

   160

			y ^= 0xF;

   161

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

   162

				z = (x - y) >> 1;

   163

			}

   164

			break;

   165

   166

		case SLOPE_SW:

   167

			z = (x >> 1) + 1;

   168

			break;

   169

   170

		case SLOPE_E:

   171

			if (y - x >= 0) {

   172

				z = (y - x) >> 1;

   173

			}

   174

			break;

   175

   176

		case SLOPE_EW:

   177

		case SLOPE_NS:

   178

		case SLOPE_ELEVATED:

   179

			z = 4;

   180

			break;

   181

   182

		case SLOPE_SE:

   183

			z = (y >> 1) + 1;

   184

			break;

   185

   186

		case SLOPE_WSE:

   187

			z = 8;

   188

			y ^= 0xF;

   189

			if (x - y < 0) {

   190

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

   191

			}

   192

			break;

   193

   194

		case SLOPE_N:

   195

			y ^= 0xF;

   196

			if (y - x >= 0) {

   197

				z = (y - x) >> 1;

   198

			}

   199

			break;

   200

   201

		case SLOPE_NW:

   202

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

   203

			break;

   204

   205

		case SLOPE_NWS:

   206

			z = 8;

   207

			if (x - y < 0) {

   208

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

   209

			}

   210

			break;

   211

   212

		case SLOPE_NE:

   213

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

   214

			break;

   215

   216

		case SLOPE_ENW:

   217

			z = 8;

   218

			y ^= 0xF;

   219

			if (y - x < 0) {

   220

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

   221

			}

   222

			break;

   223

   224

		case SLOPE_SEN:

   225

			z = 8;

   226

			if (y - x < 0) {

   227

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

   228

			}

   229

			break;

   230

   231

		case SLOPE_STEEP_S:

   232

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

   233

			break;

   234

   235

		case SLOPE_STEEP_W:

   236

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

   237

			break;

   238

   239

		case SLOPE_STEEP_N:

   240

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

   241

			break;

   242

   243

		case SLOPE_STEEP_E:

   244

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

   245

			break;

   246

   247

		default: break;

   248

	}

   249

   250

	return z;

   251

}

   252

   253

uint GetSlopeZ(int x, int y)

   254

{

   255

	TileIndex tile = TileVirtXY(x, y);

   256

   257

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

   258

}

   259

   260

/**

   261

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

   262

 *

   263

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

   264

 *

   265

 * @param tileh The slope.

   266

 * @param corner The corner.

   267

 * @return Z position of corner relative to TileZ.

   268

 */

   269

int GetSlopeZInCorner(Slope tileh, Corner corner)

   270

{

   271

	assert(!IsHalftileSlope(tileh));

   272

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

   273

}

   274

   275

/**

   276

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

   277

 *

   278

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

   279

 *

   280

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

   281

 *

   282

 * @param tileh The slope of the tile.

   283

 * @param edge The edge of interest.

   284

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

   285

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

   286

 */

   287

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

   288

{

   289

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

   290

		/*    corner     |          steep slope

   291

		 *  z1      z2   |       z1             z2        */

   292

		{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

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

   295

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

   296

	};

   297

   298

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

   299

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

   300

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

   301

   302

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

   303

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

   304

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

   305

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

   306

}

   307

   308

/**

   309

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

   310

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

   311

 *

   312

 * @param tile The tile of interest.

   313

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

   314

 * @return The slope on top of the foundation.

   315

 */

   316

Slope GetFoundationSlope(TileIndex tile, uint* z)

   317

{

   318

	Slope tileh = GetTileSlope(tile, z);

   319

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

   320

	uint z_inc = ApplyFoundationToSlope(f, &tileh);

   321

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

   322

	return tileh;

   323

}

   324

   325

   326

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

   327

{

   328

	uint z;

   329

   330

	int z_W_here = z_here;

   331

	int z_N_here = z_here;

   332

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

   333

   334

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

   335

	int z_W = z;

   336

	int z_N = z;

   337

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

   338

   339

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

   340

}

   341

   342

   343

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

   344

{

   345

	uint z;

   346

   347

	int z_E_here = z_here;

   348

	int z_N_here = z_here;

   349

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

   350

   351

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

   352

	int z_E = z;

   353

	int z_N = z;

   354

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

   355

   356

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

   357

}

   358

   359

   360

void DrawFoundation(TileInfo *ti, Foundation f)

   361

{

   362

	if (!IsFoundation(f)) return;

   363

   364

	/* Two part foundations must be drawn separately */

   365

	assert(f != FOUNDATION_STEEP_BOTH);

   366

   367

	uint sprite_block = 0;

   368

	uint z;

   369

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

   370

   371

	/* Select the needed block of foundations sprites

   372

	 * Block 0: Walls at NW and NE edge

   373

	 * Block 1: Wall  at        NE edge

   374

	 * Block 2: Wall  at NW        edge

   375

	 * Block 3: No walls at NW or NE edge

   376

	 */

   377

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

   378

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

   379

   380

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

   381

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

   382

	SpriteID inclined_base = SPR_SLOPES_VIRTUAL_BASE + SPR_SLOPES_INCLINED_OFFSET + sprite_block * SPR_TRKFOUND_BLOCK_SIZE;

   383

	SpriteID halftile_base = SPR_HALFTILE_FOUNDATION_BASE + sprite_block * SPR_HALFTILE_BLOCK_SIZE;

   384

   385

	if (IsSteepSlope(ti->tileh)) {

   386

		if (!IsNonContinuousFoundation(f)) {

   387

			/* Lower part of foundation */

   388

			AddSortableSpriteToDraw(

   389

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

   390

			);

   391

		}

   392

   393

		Corner highest_corner = GetHighestSlopeCorner(ti->tileh);

   394

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

   395

   396

		if (IsInclinedFoundation(f)) {

   397

			/* inclined foundation */

   398

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

   399

   400

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

   401

			OffsetGroundSprite(31, 9);

   402

		} else if (f == FOUNDATION_STEEP_LOWER) {

   403

			/* one corner raised */

   404

			OffsetGroundSprite(31, 1);

   405

		} else {

   406

			/* halftile foundation */

   407

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

   408

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

   409

   410

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

   411

			OffsetGroundSprite(31, 9);

   412

		}

   413

	} else {

   414

		if (IsLeveledFoundation(f)) {

   415

			/* leveled foundation */

   416

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

   417

			OffsetGroundSprite(31, 1);

   418

		} else if (IsNonContinuousFoundation(f)) {

   419

			/* halftile foundation */

   420

			Corner halftile_corner = GetHalftileFoundationCorner(f);

   421

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

   422

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

   423

   424

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

   425

			OffsetGroundSprite(31, 9);

   426

		} else if (IsSpecialRailFoundation(f)) {

   427

			/* anti-zig-zag foundation */

   428

			SpriteID spr;

   429

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

   430

				/* half of leveled foundation under track corner */

   431

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

   432

			} else {

   433

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

   434

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

   435

			}

   436

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

   437

			OffsetGroundSprite(31, 9);

   438

		} else {

   439

			/* inclined foundation */

   440

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

   441

   442

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

   443

			OffsetGroundSprite(31, 9);

   444

		}

   445

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

   446

	}

   447

}

   448

   449

void DoClearSquare(TileIndex tile)

   450

{

   451

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

   452

	MarkTileDirtyByTile(tile);

   453

}

   454

   455

/** Returns information about trackdirs and signal states.

   456

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

   457

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

   458

 * @param tile tile to get info about

   459

 * @param mode transport type

   460

 * @param sub_mode for TRANSPORT_ROAD, roadtypes to check

   461

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

   462

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

   463

 */

   464

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

   465

{

   466

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

   467

}

   468

   469

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

   470

{

   471

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

   472

}

   473

   474

void GetAcceptedCargo(TileIndex tile, AcceptedCargo ac)

   475

{

   476

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

   477

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

   478

}

   479

   480

void AnimateTile(TileIndex tile)

   481

{

   482

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

   483

}

   484

   485

void ClickTile(TileIndex tile)

   486

{

   487

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

   488

}

   489

   490

void GetTileDesc(TileIndex tile, TileDesc *td)

   491

{