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/* $Id$ */

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/** @file vehicle.cpp */

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#include "stdafx.h"

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#include "openttd.h"

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#include "road_map.h"

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#include "roadveh.h"

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#include "ship.h"

    10

#include "spritecache.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 "landscape.h"

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#include "map.h"

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#include "tile.h"

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#include "vehicle.h"

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#include "gfx.h"

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#include "viewport.h"

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#include "news.h"

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#include "command.h"

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#include "saveload.h"

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#include "player.h"

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#include "engine.h"

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#include "sound.h"

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#include "debug.h"

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#include "vehicle_gui.h"

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#include "depot.h"

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#include "station.h"

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#include "rail.h"

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#include "train.h"

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#include "aircraft.h"

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#include "industry_map.h"

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#include "station_map.h"

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#include "water_map.h"

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#include "network/network.h"

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#include "yapf/yapf.h"

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#include "date.h"

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#include "newgrf_callbacks.h"

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#include "newgrf_engine.h"

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#include "newgrf_sound.h"

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#include "helpers.hpp"

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    44

#define INVALID_COORD (-0x8000)

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#define GEN_HASH(x, y) ((GB((y), 6, 6) << 6) + GB((x), 7, 6))

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    47

    48

/* Tables used in vehicle.h to find the right command for a certain vehicle type */

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const uint32 _veh_build_proc_table[] = {

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	CMD_BUILD_RAIL_VEHICLE,

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	CMD_BUILD_ROAD_VEH,

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	CMD_BUILD_SHIP,

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	CMD_BUILD_AIRCRAFT,

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};

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const uint32 _veh_sell_proc_table[] = {

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	CMD_SELL_RAIL_WAGON,

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	CMD_SELL_ROAD_VEH,

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	CMD_SELL_SHIP,

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	CMD_SELL_AIRCRAFT,

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};

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    62

const uint32 _veh_refit_proc_table[] = {

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	CMD_REFIT_RAIL_VEHICLE,

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	CMD_REFIT_ROAD_VEH,

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	CMD_REFIT_SHIP,

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	CMD_REFIT_AIRCRAFT,

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};

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    69

const uint32 _send_to_depot_proc_table[] = {

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	CMD_SEND_TRAIN_TO_DEPOT,

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	CMD_SEND_ROADVEH_TO_DEPOT,

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	CMD_SEND_SHIP_TO_DEPOT,

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	CMD_SEND_AIRCRAFT_TO_HANGAR,

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};

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    76

    77

enum {

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	BLOCKS_FOR_SPECIAL_VEHICLES   = 2, ///< Blocks needed for special vehicles

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};

    80

    81

/**

    82

 * Called if a new block is added to the vehicle-pool

    83

 */

    84

static void VehiclePoolNewBlock(uint start_item)

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{

    86

	Vehicle *v;

    87

    88

	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.

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	 * TODO - This is just a temporary stage, this will be removed. */

    90

	for (v = GetVehicle(start_item); v != NULL; v = (v->index + 1U < GetVehiclePoolSize()) ? GetVehicle(v->index + 1) : NULL) {

    91

		v->index = start_item++;

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		v->type  = VEH_INVALID;

    93

	}

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}

    95

    96

/* Initialize the vehicle-pool */

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DEFINE_OLD_POOL(Vehicle, Vehicle, VehiclePoolNewBlock, NULL)

    98

    99

void VehicleServiceInDepot(Vehicle *v)

   100

{

   101

	v->date_of_last_service = _date;

   102

	v->breakdowns_since_last_service = 0;

   103

	v->reliability = GetEngine(v->engine_type)->reliability;

   104

	InvalidateWindow(WC_VEHICLE_DETAILS, v->index); // ensure that last service date and reliability are updated

   105

}

   106

   107

bool VehicleNeedsService(const Vehicle *v)

   108

{

   109

	if (v->vehstatus & VS_CRASHED)

   110

		return false; // Crashed vehicles don't need service anymore

   111

   112

	if (_patches.no_servicing_if_no_breakdowns && _opt.diff.vehicle_breakdowns == 0) {

   113

		return EngineHasReplacementForPlayer(GetPlayer(v->owner), v->engine_type);  /* Vehicles set for autoreplacing needs to go to a depot even if breakdowns are turned off */

   114

	}

   115

   116

	return _patches.servint_ispercent ?

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		(v->reliability < GetEngine(v->engine_type)->reliability * (100 - v->service_interval) / 100) :

   118

		(v->date_of_last_service + v->service_interval < _date);

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}

   120

   121

StringID VehicleInTheWayErrMsg(const Vehicle* v)

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{

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	switch (v->type) {

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		case VEH_TRAIN:    return STR_8803_TRAIN_IN_THE_WAY;

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		case VEH_ROAD:     return STR_9000_ROAD_VEHICLE_IN_THE_WAY;

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		case VEH_AIRCRAFT: return STR_A015_AIRCRAFT_IN_THE_WAY;

   127

		default:           return STR_980E_SHIP_IN_THE_WAY;

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	}

   129

}

   130

   131

static void *EnsureNoVehicleProc(Vehicle *v, void *data)

   132

{

   133

	if (v->tile != *(const TileIndex*)data || v->type == VEH_DISASTER)

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		return NULL;

   135

   136

	_error_message = VehicleInTheWayErrMsg(v);

   137

	return v;

   138

}

   139

   140

bool EnsureNoVehicle(TileIndex tile)

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{

   142

	return VehicleFromPos(tile, &tile, EnsureNoVehicleProc) == NULL;

   143

}

   144

   145

static void *EnsureNoVehicleProcZ(Vehicle *v, void *data)

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{

   147

	const TileInfo *ti = (const TileInfo*)data;

   148

   149

	if (v->tile != ti->tile || v->type == VEH_DISASTER) return NULL;

   150

	if (v->z_pos > ti->z) return NULL;

   151

   152

	_error_message = VehicleInTheWayErrMsg(v);

   153

	return v;

   154

}

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   156

   157

bool EnsureNoVehicleOnGround(TileIndex tile)

   158

{

   159

	TileInfo ti;

   160

   161

	ti.tile = tile;

   162

	ti.z = GetTileMaxZ(tile);

   163

	return VehicleFromPos(tile, &ti, EnsureNoVehicleProcZ) == NULL;

   164

}

   165

   166

Vehicle *FindVehicleOnTileZ(TileIndex tile, byte z)

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{

   168

	TileInfo ti;

   169

   170

	ti.tile = tile;

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	ti.z = z;

   172

   173

	return (Vehicle*)VehicleFromPos(tile, &ti, EnsureNoVehicleProcZ);

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}

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   176

Vehicle *FindVehicleBetween(TileIndex from, TileIndex to, byte z, bool without_crashed)

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{

   178

	int x1 = TileX(from);

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	int y1 = TileY(from);

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	int x2 = TileX(to);

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	int y2 = TileY(to);

   182

	Vehicle *veh;

   183

   184

	/* Make sure x1 < x2 or y1 < y2 */

   185

	if (x1 > x2 || y1 > y2) {

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		Swap(x1, x2);

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		Swap(y1, y2);

   188

	}

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	FOR_ALL_VEHICLES(veh) {

   190

		if (without_crashed && (veh->vehstatus & VS_CRASHED) != 0) continue;

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				return veh;

   195

			}

   196

		}

   197

	}

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	return NULL;

   199

}

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   201

   202

static void UpdateVehiclePosHash(Vehicle* v, int x, int y);

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   204

void VehiclePositionChanged(Vehicle *v)

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{

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	int img = v->cur_image;

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	Point pt = RemapCoords(v->x_pos + v->x_offs, v->y_pos + v->y_offs, v->z_pos);

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	const Sprite* spr = GetSprite(img);

   209

   210

	pt.x += spr->x_offs;

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	pt.y += spr->y_offs;

   212

   213

	UpdateVehiclePosHash(v, pt.x, pt.y);

   214

   215

	v->left_coord = pt.x;

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	v->top_coord = pt.y;

   217

	v->right_coord = pt.x + spr->width + 2;

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	v->bottom_coord = pt.y + spr->height + 2;

   219

}

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   221

/** Called after load to update coordinates */

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void AfterLoadVehicles()

   223

{

   224

	Vehicle *v;

   225

   226

	FOR_ALL_VEHICLES(v) {

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		v->first = NULL;

   228

		if (v->type == VEH_TRAIN) v->u.rail.first_engine = INVALID_ENGINE;

   229

	}

   230

   231

	FOR_ALL_VEHICLES(v) {

   232

		if (v->type == VEH_TRAIN && (IsFrontEngine(v) || IsFreeWagon(v)))

   233

			TrainConsistChanged(v);

   234

	}

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   236

	FOR_ALL_VEHICLES(v) {

   237

		switch (v->type) {

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			case VEH_TRAIN: v->cur_image = GetTrainImage(v, v->direction); break;

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			case VEH_ROAD: v->cur_image = GetRoadVehImage(v, v->direction); break;

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			case VEH_SHIP: v->cur_image = GetShipImage(v, v->direction); break;

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			case VEH_AIRCRAFT:

   242

				if (IsNormalAircraft(v)) {

   243

					v->cur_image = GetAircraftImage(v, v->direction);

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   245

					/* The plane's shadow will have the same image as the plane */

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					Vehicle *shadow = v->next;

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					shadow->cur_image = v->cur_image;

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   249

					/* In the case of a helicopter we will update the rotor sprites */

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					if (v->subtype == AIR_HELICOPTER) {

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						Vehicle *rotor = shadow->next;

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						rotor->cur_image = GetRotorImage(v);

   253

					}

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				}

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				break;

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			default: break;

   259

		}

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   261

		v->left_coord = INVALID_COORD;

   262

		VehiclePositionChanged(v);

   263

	}

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}

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   266

static Vehicle *InitializeVehicle(Vehicle *v)

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{

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	VehicleID index = v->index;

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	memset(v, 0, sizeof(Vehicle));

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	v->index = index;

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   272

	assert(v->orders == NULL);

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   274

	v->type = VEH_INVALID;

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	v->left_coord = INVALID_COORD;

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	v->first = NULL;

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	v->next = NULL;

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	v->next_hash = NULL;

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	v->string_id = 0;

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	v->next_shared = NULL;

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	v->prev_shared = NULL;

   282

	v->depot_list  = NULL;

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	v->random_bits = 0;

   284

	return v;

   285

}

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   287

/**

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 * Get a value for a vehicle's random_bits.

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 * @return A random value from 0 to 255.

   290

 */

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byte VehicleRandomBits()

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{

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	return GB(Random(), 0, 8);

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}

   295

   296

Vehicle *ForceAllocateSpecialVehicle()

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{

   298

	/* This stays a strange story.. there should always be room for special

   299

	 * vehicles (special effects all over the map), but with 65k of vehicles

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	 * is this realistic to double-check for that? For now we just reserve

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	 * BLOCKS_FOR_SPECIAL_VEHICLES times block_size vehicles that may only

   302

	 * be used for special vehicles.. should work nicely :) */

   303

   304

	Vehicle *v;

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   306

	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.

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	 * TODO - This is just a temporary stage, this will be removed. */

   308

	for (v = GetVehicle(0); v != NULL; v = (v->index + 1U < GetVehiclePoolSize()) ? GetVehicle(v->index + 1) : NULL) {

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		/* No more room for the special vehicles, return NULL */

   310

		if (v->index >= (1 << Vehicle_POOL_BLOCK_SIZE_BITS) * BLOCKS_FOR_SPECIAL_VEHICLES)

   311

			return NULL;

   312

   313

		if (!IsValidVehicle(v)) return InitializeVehicle(v);

   314

	}

   315

   316

	return NULL;

   317

}

   318

   319

/**

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 * finds a free vehicle in the memory or allocates a new one

   321

 * returns a pointer to the first free vehicle or NULL if all vehicles are in use

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 * *skip_vehicles is an offset to where in the array we should begin looking

   323

 * this is to avoid looping though the same vehicles more than once after we learned that they are not free

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 * this feature is used by AllocateVehicles() since it need to allocate more than one and when

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 * another block is added to _Vehicle_pool, since we only do that when we know it's already full

   326

 */

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static Vehicle *AllocateSingleVehicle(VehicleID *skip_vehicles)

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{

   329

	/* See note by ForceAllocateSpecialVehicle() why we skip the

   330

	 * first blocks */

   331

	Vehicle *v;

   332

	const int offset = (1 << Vehicle_POOL_BLOCK_SIZE_BITS) * BLOCKS_FOR_SPECIAL_VEHICLES;

   333

   334

	/* We don't use FOR_ALL here, because FOR_ALL skips invalid items.

   335

	 * @todo - This is just a temporary stage, this will be removed. */

   336

	if (*skip_vehicles < (_Vehicle_pool.total_items - offset)) { // make sure the offset in the array is not larger than the array itself

   337

		for (v = GetVehicle(offset + *skip_vehicles); v != NULL; v = (v->index + 1U < GetVehiclePoolSize()) ? GetVehicle(v->index + 1) : NULL) {

   338

			(*skip_vehicles)++;

   339

			if (!IsValidVehicle(v)) return InitializeVehicle(v);

   340

		}

   341

	}

   342

   343

	/* Check if we can add a block to the pool */

   344

	if (AddBlockToPool(&_Vehicle_pool))

   345

		return AllocateSingleVehicle(skip_vehicles);

   346

   347

	return NULL;

   348

}

   349

   350

   351

Vehicle *AllocateVehicle()

   352

{

   353

	VehicleID counter = 0;

   354

	return AllocateSingleVehicle(&counter);

   355

}

   356

   357

   358

/** Allocates a lot of vehicles and frees them again

   359

 * @param vl pointer to an array of vehicles to get allocated. Can be NULL if the vehicles aren't needed (makes it test only)

   360

 * @param num number of vehicles to allocate room for

   361

 * @return true if there is room to allocate all the vehicles

   362

 */

   363

bool AllocateVehicles(Vehicle **vl, int num)

   364

{

   365

	int i;

   366

	Vehicle *v;

   367

	VehicleID counter = 0;

   368

   369

	for (i = 0; i != num; i++) {

   370

		v = AllocateSingleVehicle(&counter);

   371

		if (v == NULL) {

   372

			return false;

   373

		}

   374

		if (vl != NULL) {

   375

			vl[i] = v;

   376

		}

   377

	}

   378

   379

	return true;

   380

}

   381

   382

   383

static Vehicle *_vehicle_position_hash[0x1000];

   384

   385

void *VehicleFromPos(TileIndex tile, void *data, VehicleFromPosProc *proc)

   386

{

   387

	Point pt = RemapCoords(TileX(tile) * TILE_SIZE, TileY(tile) * TILE_SIZE, 0);

   388

   389

	/* The hash area to scan */

   390

	const int xl = GB(pt.x - 174, 7, 6);

   391

	const int xu = GB(pt.x + 104, 7, 6);

   392

	const int yl = GB(pt.y - 294, 6, 6) << 6;

   393

	const int yu = GB(pt.y +  56, 6, 6) << 6;

   394

   395

	int x;

   396

	int y;

   397

   398

	for (y = yl;; y = (y + (1 << 6)) & (0x3F << 6)) {

   399

		for (x = xl;; x = (x + 1) & 0x3F) {

   400

			Vehicle *v = _vehicle_position_hash[(x + y) & 0xFFFF];

   401

   402

			while (v != NULL) {

   403

				void* a = proc(v, data);

   404

   405

				if (a != NULL) return a;

   406

				v = v->next_hash;

   407

			}

   408

   409

			if (x == xu) break;

   410

		}

   411

   412

		if (y == yu) break;

   413

	}

   414

	return NULL;

   415

}

   416

   417

   418

static void UpdateVehiclePosHash(Vehicle* v, int x, int y)

   419

{

   420

	Vehicle **old_hash, **new_hash;

   421

	int old_x = v->left_coord;

   422

	int old_y = v->top_coord;

   423

   425

	old_hash = (old_x == INVALID_COORD) ? NULL : &_vehicle_position_hash[GEN_HASH(old_x, old_y)];

   426

   427

	if (old_hash == new_hash) return;

   428

   429

	/* remove from hash table? */

   430

	if (old_hash != NULL) {

   431

		Vehicle *last = NULL;

   432

		Vehicle *u = *old_hash;

   433

		while (u != v) {

   434

			last = u;

   435

			u = u->next_hash;

   436

			assert(u != NULL);

   437

		}

   438

   439

		if (last == NULL) {

   440

			*old_hash = v->next_hash;

   441

		} else {

   442

			last->next_hash = v->next_hash;

   443

		}

   444

	}

   445

   446

	/* insert into hash table? */

   447

	if (new_hash != NULL) {

   448

		v->next_hash = *new_hash;

   449

		*new_hash = v;

   450

	}

   451

}

   452

   453

void ResetVehiclePosHash()

   454

{

   455

	memset(_vehicle_position_hash, 0, sizeof(_vehicle_position_hash));

   456

}

   457

   458

void InitializeVehicles()

   459

{

   460

	uint i;

   461

   462

	/* Clean the vehicle pool, and reserve enough blocks

   463

	 *  for the special vehicles, plus one for all the other

   464

	 *  vehicles (which is increased on-the-fly) */

   465

	CleanPool(&_Vehicle_pool);

   466

	AddBlockToPool(&_Vehicle_pool);

   467

	for (i = 0; i < BLOCKS_FOR_SPECIAL_VEHICLES; i++) {

   468

		AddBlockToPool(&_Vehicle_pool);

   469

	}

   470

   471

	ResetVehiclePosHash();

   472

}

   473

   474

Vehicle *GetLastVehicleInChain(Vehicle *v)

   475

{

   476

	while (v->next != NULL) v = v->next;

   477

	return v;

   478

}

   479

   480

/** Finds the previous vehicle in a chain, by a brute force search.

   481

 * This old function is REALLY slow because it searches through all vehicles to

   482

 * find the previous vehicle, but if v->first has not been set, then this function

   483

 * will need to be used to find the previous one. This function should never be

   484

 * called by anything but GetFirstVehicleInChain

   485

 */

   486

static Vehicle *GetPrevVehicleInChain_bruteforce(const Vehicle *v)

   487

{

   488

	Vehicle *u;