C++ Ship::InvalidateNewGRFCacheOfChain方法代码示例

/**
 * Build a ship.
 * @param tile     tile of the depot where ship is built.
 * @param flags    type of operation.
 * @param e        the engine to build.
 * @param data     unused.
 * @param ret[out] the vehicle that has been built.
 * @return the cost of this operation or an error.
 */
CommandCost CmdBuildShip(TileIndex tile, DoCommandFlag flags, const Engine *e, uint16 data, Vehicle **ret)
{
	tile = GetShipDepotNorthTile(tile);
	if (flags & DC_EXEC) {
		int x;
		int y;

		const ShipVehicleInfo *svi = &e->u.ship;

		Ship *v = new Ship();
		*ret = v;

		v->owner = _current_company;
		v->tile = tile;
		x = TileX(tile) * TILE_SIZE + TILE_SIZE / 2;
		y = TileY(tile) * TILE_SIZE + TILE_SIZE / 2;
		v->x_pos = x;
		v->y_pos = y;
		v->z_pos = GetSlopeZ(x, y);

		v->UpdateDeltaXY(v->direction);
		v->vehstatus = VS_HIDDEN | VS_STOPPED | VS_DEFPAL;

		v->spritenum = svi->image_index;
		v->cargo_type = e->GetDefaultCargoType();
		v->cargo_cap = svi->capacity;

		v->last_station_visited = INVALID_STATION;
		v->engine_type = e->index;

		v->reliability = e->reliability;
		v->reliability_spd_dec = e->reliability_spd_dec;
		v->max_age = e->GetLifeLengthInDays();
		_new_vehicle_id = v->index;

		v->state = TRACK_BIT_DEPOT;

		v->service_interval = Company::Get(_current_company)->settings.vehicle.servint_ships;
		v->date_of_last_service = _date;
		v->build_year = _cur_year;
		v->cur_image = SPR_IMG_QUERY;
		v->random_bits = VehicleRandomBits();

		v->UpdateCache();

		if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) SetBit(v->vehicle_flags, VF_BUILT_AS_PROTOTYPE);

		v->InvalidateNewGRFCacheOfChain();

		v->cargo_cap = GetVehicleCapacity(v);

		v->InvalidateNewGRFCacheOfChain();

		VehicleMove(v, false);
	}

	return CommandCost();
}

/** Refits a ship to the specified cargo type.
 * @param tile unused
 * @param flags type of operation
 * @param p1 vehicle ID of the ship to refit
 * @param p2 various bitstuffed elements
 * - p2 = (bit 0-7) - the new cargo type to refit to (p2 & 0xFF)
 * - p2 = (bit 8-15) - the new cargo subtype to refit to
 * - p2 = (bit 16) - refit only this vehicle (ignored)
 * @param text unused
 * @return the cost of this operation or an error
 */
CommandCost CmdRefitShip(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	CargoID new_cid = GB(p2, 0, 8); // gets the cargo number
	byte new_subtype = GB(p2, 8, 8);

	Ship *v = Ship::GetIfValid(p1);

	if (v == NULL || !CheckOwnership(v->owner)) return CMD_ERROR;
	if (!v->IsStoppedInDepot()) return_cmd_error(STR_ERROR_SHIP_MUST_BE_STOPPED_IN_DEPOT);
	if (v->vehstatus & VS_CRASHED) return_cmd_error(STR_ERROR_CAN_T_REFIT_DESTROYED_VEHICLE);

	/* Check cargo */
	if (new_cid >= NUM_CARGO) return CMD_ERROR;

	CommandCost cost = RefitVehicle(v, true, new_cid, new_subtype, flags);

	if (flags & DC_EXEC) {
		v->colourmap = PAL_NONE; // invalidate vehicle colour map
		SetWindowDirty(WC_VEHICLE_DETAILS, v->index);
		SetWindowDirty(WC_VEHICLE_DEPOT, v->tile);
		InvalidateWindowClassesData(WC_SHIPS_LIST, 0);
	}
	v->InvalidateNewGRFCacheOfChain(); // always invalidate; querycost might have filled it

	return cost;

}

/** Build a ship.
 * @param tile tile of depot where ship is built
 * @param flags type of operation
 * @param p1 ship type being built (engine)
 * @param p2 unused
 * @param text unused
 * @return the cost of this operation or an error
 */
CommandCost CmdBuildShip(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
{
	UnitID unit_num;

	if (!IsEngineBuildable(p1, VEH_SHIP, _current_company)) return_cmd_error(STR_ERROR_SHIP_NOT_AVAILABLE);

	const Engine *e = Engine::Get(p1);
	CommandCost value(EXPENSES_NEW_VEHICLES, e->GetCost());

	/* Engines without valid cargo should not be available */
	if (e->GetDefaultCargoType() == CT_INVALID) return CMD_ERROR;

	if (flags & DC_QUERY_COST) return value;

	/* The ai_new queries the vehicle cost before building the route,
	 * so we must check against cheaters no sooner than now. --pasky */
	if (!IsShipDepotTile(tile)) return CMD_ERROR;
	if (!IsTileOwner(tile, _current_company)) return CMD_ERROR;

	unit_num = (flags & DC_AUTOREPLACE) ? 0 : GetFreeUnitNumber(VEH_SHIP);

	if (!Vehicle::CanAllocateItem() || unit_num > _settings_game.vehicle.max_ships)
		return_cmd_error(STR_ERROR_TOO_MANY_VEHICLES_IN_GAME);

	if (flags & DC_EXEC) {
		int x;
		int y;

		const ShipVehicleInfo *svi = &e->u.ship;

		Ship *v = new Ship();
		v->unitnumber = unit_num;

		v->owner = _current_company;
		v->tile = tile;
		x = TileX(tile) * TILE_SIZE + TILE_SIZE / 2;
		y = TileY(tile) * TILE_SIZE + TILE_SIZE / 2;
		v->x_pos = x;
		v->y_pos = y;
		v->z_pos = GetSlopeZ(x, y);

		v->UpdateDeltaXY(v->direction);
		v->vehstatus = VS_HIDDEN | VS_STOPPED | VS_DEFPAL;

		v->spritenum = svi->image_index;
		v->cargo_type = e->GetDefaultCargoType();
		v->cargo_cap = svi->capacity;
		v->value = value.GetCost();

		v->last_station_visited = INVALID_STATION;
		v->max_speed = svi->max_speed;
		v->engine_type = p1;

		v->reliability = e->reliability;
		v->reliability_spd_dec = e->reliability_spd_dec;
		v->max_age = e->GetLifeLengthInDays();
		_new_vehicle_id = v->index;

		v->state = TRACK_BIT_DEPOT;

		v->service_interval = Company::Get(_current_company)->settings.vehicle.servint_ships;
		v->date_of_last_service = _date;
		v->build_year = _cur_year;
		v->cur_image = SPR_IMG_QUERY;
		v->random_bits = VehicleRandomBits();

		if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) SetBit(v->vehicle_flags, VF_BUILT_AS_PROTOTYPE);

		v->InvalidateNewGRFCacheOfChain();

		v->cargo_cap = GetVehicleCapacity(v);

		v->InvalidateNewGRFCacheOfChain();

		VehicleMove(v, false);

		InvalidateWindowData(WC_VEHICLE_DEPOT, v->tile);
		InvalidateWindowClassesData(WC_SHIPS_LIST, 0);
		SetWindowDirty(WC_COMPANY, v->owner);
		if (IsLocalCompany()) {
			InvalidateAutoreplaceWindow(v->engine_type, v->group_id); // updates the replace Ship window
		}

		Company::Get(_current_company)->num_engines[p1]++;
	}

	return value;
}