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/* $Id$ */

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/** @file road_cmd.cpp */

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#include "stdafx.h"

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#include "openttd.h"

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#include "bridge_map.h"

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#include "bridge.h"

     9

#include "cmd_helper.h"

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#include "rail_map.h"

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#include "road_map.h"

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#include "sprite.h"

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#include "table/sprites.h"

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#include "table/strings.h"

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#include "functions.h"

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#include "map.h"

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#include "landscape.h"

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#include "tile.h"

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#include "town_map.h"

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#include "vehicle.h"

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#include "viewport.h"

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#include "command.h"

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#include "player.h"

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#include "town.h"

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#include "gfx.h"

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#include "sound.h"

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#include "yapf/yapf.h"

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#include "depot.h"

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#include "newgrf.h"

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    34

    35

static uint CountRoadBits(RoadBits r)

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{

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	uint count = 0;

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	if (r & ROAD_NW) ++count;

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	if (r & ROAD_SW) ++count;

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	if (r & ROAD_SE) ++count;

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	if (r & ROAD_NE) ++count;

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	return count;

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}

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bool CheckAllowRemoveRoad(TileIndex tile, RoadBits remove, Owner owner, bool *edge_road, RoadType rt)

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{

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	RoadBits present;

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	RoadBits n;

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	*edge_road = true;

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	if (_game_mode == GM_EDITOR || remove == ROAD_NONE) return true;

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    60

    61

	/* Only do the special processing if the road is owned

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	 * by a town */

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	if (owner != OWNER_TOWN) return (owner == OWNER_NONE) || CheckOwnership(owner);

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    65

	if (_cheats.magic_bulldozer.value) return true;

    66

    67

	/* Get a bitmask of which neighbouring roads has a tile */

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	n = ROAD_NONE;

    69

	present = GetAnyRoadBits(tile, rt);

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	if (present & ROAD_NE && GetAnyRoadBits(TILE_ADDXY(tile, -1,  0), rt) & ROAD_SW) n |= ROAD_NE;

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	if (present & ROAD_SE && GetAnyRoadBits(TILE_ADDXY(tile,  0,  1), rt) & ROAD_NW) n |= ROAD_SE;

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	if (present & ROAD_SW && GetAnyRoadBits(TILE_ADDXY(tile,  1,  0), rt) & ROAD_NE) n |= ROAD_SW;

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	if (present & ROAD_NW && GetAnyRoadBits(TILE_ADDXY(tile,  0, -1), rt) & ROAD_SE) n |= ROAD_NW;

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	/* If 0 or 1 bits are set in n, or if no bits that match the bits to remove,

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	 * then allow it */

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	if ((n & (n - 1)) != 0 && (n & remove) != 0) {

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		Town *t;

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		*edge_road = false;

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		/* you can remove all kind of roads with extra dynamite */

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		if (_patches.extra_dynamite) return true;

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    83

		t = ClosestTownFromTile(tile, (uint)-1);

    84

    85

		SetDParam(0, t->index);

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		_error_message = STR_2009_LOCAL_AUTHORITY_REFUSES;

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		return false;

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	}

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    90

	return true;

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}

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static bool CheckAllowRemoveRoad(TileIndex tile, RoadBits remove, bool *edge_road, RoadType rt)

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{

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	return CheckAllowRemoveRoad(tile, remove, GetRoadOwner(tile, rt), edge_road, rt);

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}

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/** Delete a piece of road.

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 * @param tile tile where to remove road from

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 * @param flags operation to perform

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 * @param p1 bit 0..3 road pieces to remove (RoadBits)

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 *           bit 4..5 road type

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 * @param p2 unused

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 */

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int32 CmdRemoveRoad(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

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{

   112

	/* cost for removing inner/edge -roads */

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	static const uint16 road_remove_cost[2] = {50, 18};

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   115

	Town *t;

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	/* true if the roadpiece was always removeable,

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	 * false if it was a center piece. Affects town ratings drop */

   118

	bool edge_road;

   119

   120

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   121

   122

	RoadType rt = (RoadType)GB(p1, 4, 2);

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   146

	if (owner == OWNER_TOWN && _game_mode != GM_EDITOR) {

   147

		t = GetTownByTile(tile);

   148

	} else {

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		t = NULL;

   150

	}

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   152

	RoadBits pieces = Extract<RoadBits, 0>(p1);

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	RoadTypes rts = GetRoadTypes(tile);

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	/* The tile doesn't have the given road type */

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	if (!HASBIT(rts, rt)) return CMD_ERROR;

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   157

	if (!CheckAllowRemoveRoad(tile, pieces, &edge_road, rt)) return CMD_ERROR;

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   159

	if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

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   161

	/* check if you're allowed to remove the street owned by a town

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	 * removal allowance depends on difficulty setting */

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	if (!CheckforTownRating(flags, t, ROAD_REMOVE)) return CMD_ERROR;

   164

   197

	switch (GetRoadTileType(tile)) {

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		case ROAD_TILE_NORMAL: {

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			RoadBits present = GetRoadBits(tile, rt);

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			RoadBits c = pieces;

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   202

			if (HasRoadWorks(tile)) return_cmd_error(STR_ROAD_WORKS_IN_PROGRESS);

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   204

			if (GetTileSlope(tile, NULL) != SLOPE_FLAT  &&

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					(present == ROAD_Y || present == ROAD_X)) {

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				c |= (RoadBits)((c & 0xC) >> 2);

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				c |= (RoadBits)((c & 0x3) << 2);

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			}

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   210

			/* limit the bits to delete to the existing bits. */

   211

			c &= present;

   212

			if (c == ROAD_NONE) return CMD_ERROR;

   213

   214

			present ^= c;

   215

			if (flags & DC_EXEC) {

   216

				ChangeTownRating(t, -road_remove_cost[(byte)edge_road], RATING_ROAD_MINIMUM);

   217

   218

				if (present == ROAD_NONE) {

   219

					RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));

   220

					if (rts == ROADTYPES_NONE) {

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						DoClearSquare(tile);

   222

					} else {

   223

						SetRoadBits(tile, ROAD_NONE, rt);

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						SetRoadTypes(tile, rts);

   225

					}

   226

				} else {

   231

					SetRoadBits(tile, present, rt);

   232

					MarkTileDirtyByTile(tile);

   233

				}

   234

			}

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			return CountRoadBits(c) * _eco->GetPrice(CEconomy::REMOVE_ROAD, tile, (present == 0));

   236

		}

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   238

		case ROAD_TILE_CROSSING: {

   239

			if (pieces & ComplementRoadBits(GetCrossingRoadBits(tile))) {

   240

				return CMD_ERROR;

   241

			}

   242

   247

			if (flags & DC_EXEC) {

   248

				if (rt == ROADTYPE_ROAD) {

   249

					ChangeTownRating(t, -road_remove_cost[(byte)edge_road], RATING_ROAD_MINIMUM);

   250

				}

   251

   252

				RoadTypes rts = GetRoadTypes(tile) & ComplementRoadTypes(RoadTypeToRoadTypes(rt));

   253

				if (rts == ROADTYPES_NONE) {

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					MakeRailNormal(tile, GetTileOwner(tile), GetCrossingRailBits(tile), GetRailType(tile));

   255

				} else {

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					SetRoadTypes(tile, rts);

   257

				}

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				MarkTileDirtyByTile(tile);

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				YapfNotifyTrackLayoutChange(tile, FindFirstTrack(GetTrackBits(tile)));

   260

			}

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			return _eco->GetPrice(CEconomy::REMOVE_ROAD) * 2;

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		}

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		default:

   265

		case ROAD_TILE_DEPOT:

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			return CMD_ERROR;

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	}

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}

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static const RoadBits _valid_tileh_slopes_road[][15] = {

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	/* set of normal ones */

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	{

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		ROAD_ALL, ROAD_NONE, ROAD_NONE,

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		ROAD_X,   ROAD_NONE, ROAD_NONE,  // 3, 4, 5

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		ROAD_Y,   ROAD_NONE, ROAD_NONE,

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		ROAD_Y,   ROAD_NONE, ROAD_NONE,  // 9, 10, 11

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		ROAD_X,   ROAD_NONE, ROAD_NONE

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	},

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	/* allowed road for an evenly raised platform */

   281

	{

   282

		ROAD_NONE,

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		ROAD_SW | ROAD_NW,

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		ROAD_SW | ROAD_SE,

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		ROAD_Y  | ROAD_SW,

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		ROAD_SE | ROAD_NE, // 4

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		ROAD_ALL,

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		ROAD_X  | ROAD_SE,

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		ROAD_ALL,

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		ROAD_NW | ROAD_NE, // 8

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		ROAD_X  | ROAD_NW,

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		ROAD_ALL,

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		ROAD_ALL,

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		ROAD_Y  | ROAD_NE, // 12

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		ROAD_ALL,

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		ROAD_ALL

   300

	},

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};

   302

   303

   304

static uint32 CheckRoadSlope(Slope tileh, RoadBits* pieces, RoadBits existing)

   305

{

   306

	RoadBits road_bits;

   307

   308

	if (IsSteepSlope(tileh)) {

   309

		if (existing == 0) {

   310

			/* force full pieces. */

   311

			*pieces |= (RoadBits)((*pieces & 0xC) >> 2);

   312

			*pieces |= (RoadBits)((*pieces & 0x3) << 2);

   313

			if (*pieces == ROAD_X || *pieces == ROAD_Y) return _eco->GetPrice(CEconomy::TERRAFORM);

   314

		}

   315

		return CMD_ERROR;

   316

	}

   317

	road_bits = *pieces | existing;

   318

   319

	/* no special foundation */

   320

	if ((~_valid_tileh_slopes_road[0][tileh] & road_bits) == 0) {

   321

		/* force that all bits are set when we have slopes */

   322

		if (tileh != SLOPE_FLAT) *pieces |= _valid_tileh_slopes_road[0][tileh];

   323

		return 0; // no extra cost

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	}

   325

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	/* foundation is used. Whole tile is leveled up */

   327

	if ((~_valid_tileh_slopes_road[1][tileh] & road_bits) == 0) {

   328

		return existing != 0 ? 0 : _eco->GetPrice(CEconomy::TERRAFORM);

   329

	}

   330

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	/* partly leveled up tile, only if there's no road on that tile */

   332

	if (existing == 0 && (tileh == SLOPE_W || tileh == SLOPE_S || tileh == SLOPE_E || tileh == SLOPE_N)) {

   333

		/* force full pieces. */

   334

		*pieces |= (RoadBits)((*pieces & 0xC) >> 2);

   335

		*pieces |= (RoadBits)((*pieces & 0x3) << 2);

   336

		if (*pieces == ROAD_X || *pieces == ROAD_Y) return _eco->GetPrice(CEconomy::TERRAFORM);

   337

	}

   338

	return CMD_ERROR;

   339

}

   340

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/** Build a piece of road.

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 * @param tile tile where to build road

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 * @param flags operation to perform

   344

 * @param p1 bit 0..3 road pieces to build (RoadBits)

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 *           bit 4..5 road type

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 * @param p2 the town that is building the road (0 if not applicable)

   348

 */

   349

int32 CmdBuildRoad(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)

   350

{

   351

	int32 cost = 0;

   352

	int32 ret;

   353

	RoadBits existing = ROAD_NONE;

   355

	Slope tileh;

   356

   357

	SET_EXPENSES_TYPE(EXPENSES_CONSTRUCTION);

   358

   359

	/* Road pieces are max 4 bitset values (NE, NW, SE, SW) and town can only be non-zero

   360

	 * if a non-player is building the road */

   361

	if ((IsValidPlayer(_current_player) && p2 != 0) || (_current_player == OWNER_TOWN && !IsValidTownID(p2))) return CMD_ERROR;

   362

   363

	RoadBits pieces = Extract<RoadBits, 0>(p1);

   364

   365

	RoadType rt = (RoadType)GB(p1, 4, 2);

   366

	if (!IsValidRoadType(rt)) return CMD_ERROR;

   367

   370

	tileh = GetTileSlope(tile, NULL);

   371

   372

	switch (GetTileType(tile)) {

   373

		case MP_STREET:

   374

			switch (GetRoadTileType(tile)) {

   376

					if (HasRoadWorks(tile)) return_cmd_error(STR_ROAD_WORKS_IN_PROGRESS);

   380

					if (!HASBIT(GetRoadTypes(tile), rt)) break;

   381

   382

					existing = GetRoadBits(tile, rt);

   389

					if ((existing & pieces) == pieces) {

   401

						return_cmd_error(STR_1007_ALREADY_BUILT);

   402

					}

   404

   405

				case ROAD_TILE_CROSSING:

   406

					if (HASBIT(GetRoadTypes(tile), rt)) return_cmd_error(STR_1007_ALREADY_BUILT);

   409

					break;

   410

   411

				default:

   412

				case ROAD_TILE_DEPOT:

   413

					goto do_clear;

   414

			}

   415

			break;

   416

   417

		case MP_RAILWAY: {

   418

			Axis roaddir;

   419

   420

			if (IsSteepSlope(tileh)) {

   421

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   422

			}

   423

   424

#define M(x) (1 << (x))

   425

			/* Level crossings may only be built on these slopes */

   426

			if (!HASBIT(M(SLOPE_SEN) | M(SLOPE_ENW) | M(SLOPE_NWS) | M(SLOPE_NS) | M(SLOPE_WSE) | M(SLOPE_EW) | M(SLOPE_FLAT), tileh)) {

   427

				return_cmd_error(STR_1000_LAND_SLOPED_IN_WRONG_DIRECTION);

   428

			}

   429

#undef M

   430

   431

			if (GetRailTileType(tile) != RAIL_TILE_NORMAL) goto do_clear;

   432

			switch (GetTrackBits(tile)) {

   433

				case TRACK_BIT_X:

   434

					if (pieces & ROAD_X) goto do_clear;

   435

					roaddir = AXIS_Y;

   436

					break;

   437

   438

				case TRACK_BIT_Y:

   439

					if (pieces & ROAD_Y) goto do_clear;

   440

					roaddir = AXIS_X;

   441

					break;

   442

   443

				default: goto do_clear;

   444

			}

   445

   446

			if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;

   447

   448

			if (flags & DC_EXEC) {

   449

				YapfNotifyTrackLayoutChange(tile, FindFirstTrack(GetTrackBits(tile)));

   452

				MarkTileDirtyByTile(tile);

   453

			}

   454

			/** @todo should be more expensive */

   456

		}

   457

   473

		default:

   474

do_clear:;

   475

			ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);

   476

			if (CmdFailed(ret)) return ret;

   477

			cost += ret;

   478

	}

   479