C++ InventoryList::changeItem方法代码示例

void read_inventory_list(lua_State *L, int tableindex,
		Inventory *inv, const char *name, Server* srv, int forcesize)
{
	if(tableindex < 0)
		tableindex = lua_gettop(L) + 1 + tableindex;
	// If nil, delete list
	if(lua_isnil(L, tableindex)){
		inv->deleteList(name);
		return;
	}
	// Otherwise set list
	std::vector<ItemStack> items = read_items(L, tableindex,srv);
	int listsize = (forcesize != -1) ? forcesize : items.size();
	InventoryList *invlist = inv->addList(name, listsize);
	int index = 0;
	for(std::vector<ItemStack>::const_iterator
			i = items.begin(); i != items.end(); i++){
		if(forcesize != -1 && index == forcesize)
			break;
		invlist->changeItem(index, *i);
		index++;
	}
	while(forcesize != -1 && index < forcesize){
		invlist->deleteItem(index);
		index++;
	}
}

bool PlayerSAO::setWieldedItem(const ItemStack &item)
{
	Inventory *inv = getInventory();
	if (inv) {
		InventoryList *mlist = inv->getList(getWieldList());
		if (mlist) {
			ItemStack olditem = mlist->getItem(getWieldIndex());
			if (olditem.name.empty()) {
				InventoryList *hlist = inv->getList("hand");
				if (hlist) {
					hlist->changeItem(0, item);
					return true;
				}
			}
			mlist->changeItem(getWieldIndex(), item);
			return true;
		}
	}
	return false;
}

bool PlayerSAO::setWieldedItem(const ItemStack &item)
{
	Inventory *inv = getInventory();
	if (inv) {
		InventoryList *mlist = inv->getList(getWieldList());
		if (mlist) {
			mlist->changeItem(getWieldIndex(), item);
			return true;
		}
	}
	return false;
}

bool ServerActiveObject::setWieldedItem(const ItemStack &item)
{
	Inventory *inv = getInventory();
	if(inv)
	{
		InventoryList *list = inv->getList(getWieldList());
		if (list)
		{
			list->changeItem(getWieldIndex(), item);
			setInventoryModified();
			return true;
		}
	}
	return false;
}

// set_stack(self, listname, i, stack) -> true/false
int InvRef::l_set_stack(lua_State *L)
{
	NO_MAP_LOCK_REQUIRED;
	InvRef *ref = checkobject(L, 1);
	const char *listname = luaL_checkstring(L, 2);
	int i = luaL_checknumber(L, 3) - 1;
	ItemStack newitem = read_item(L, 4, getServer(L)->idef());
	InventoryList *list = getlist(L, ref, listname);
	if(list != NULL && i >= 0 && i < (int) list->getSize()){
		list->changeItem(i, newitem);
		reportInventoryChange(L, ref);
		lua_pushboolean(L, true);
	} else {
		lua_pushboolean(L, false);
	}
	return 1;
}

// Crafting helper
bool getCraftingResult(Inventory *inv, ItemStack& result,
		std::vector<ItemStack> &output_replacements,
		bool decrementInput, IGameDef *gamedef)
{
	DSTACK(__FUNCTION_NAME);
	
	result.clear();

	// Get the InventoryList in which we will operate
	InventoryList *clist = inv->getList("craft");
	if(!clist)
		return false;

	// Mangle crafting grid to an another format
	CraftInput ci;
	ci.method = CRAFT_METHOD_NORMAL;
	ci.width = clist->getWidth() ? clist->getWidth() : 3;
	for(u16 i=0; i<clist->getSize(); i++)
		ci.items.push_back(clist->getItem(i));

	// Find out what is crafted and add it to result item slot
	CraftOutput co;
	bool found = gamedef->getCraftDefManager()->getCraftResult(
			ci, co, output_replacements, decrementInput, gamedef);
	if(found)
		result.deSerialize(co.item, gamedef->getItemDefManager());

	if(found && decrementInput)
	{
		// CraftInput has been changed, apply changes in clist
		for(u16 i=0; i<clist->getSize(); i++)
		{
			clist->changeItem(i, ci.items[i]);
		}
	}

	return found;
}

bool PlayerDatabasePostgreSQL::loadPlayer(RemotePlayer *player, PlayerSAO *sao)
{
	sanity_check(sao);
	verifyDatabase();

	const char *values[] = { player->getName() };
	PGresult *results = execPrepared("load_player", 1, values, false, false);

	// Player not found, return not found
	if (!PQntuples(results)) {
		PQclear(results);
		return false;
	}

	sao->setPitch(pg_to_float(results, 0, 0));
	sao->setYaw(pg_to_float(results, 0, 1));
	sao->setBasePosition(v3f(
		pg_to_float(results, 0, 2),
		pg_to_float(results, 0, 3),
		pg_to_float(results, 0, 4))
	);
	sao->setHPRaw((s16) pg_to_int(results, 0, 5));
	sao->setBreath((u16) pg_to_int(results, 0, 6), false);

	PQclear(results);

	// Load inventory
	results = execPrepared("load_player_inventories", 1, values, false, false);

	int resultCount = PQntuples(results);

	for (int row = 0; row < resultCount; ++row) {
		InventoryList* invList = player->inventory.
			addList(PQgetvalue(results, row, 2), pg_to_uint(results, row, 3));
		invList->setWidth(pg_to_uint(results, row, 1));

		u32 invId = pg_to_uint(results, row, 0);
		std::string invIdStr = itos(invId);

		const char* values2[] = {
			player->getName(),
			invIdStr.c_str()
		};
		PGresult *results2 = execPrepared("load_player_inventory_items", 2,
			values2, false, false);

		int resultCount2 = PQntuples(results2);
		for (int row2 = 0; row2 < resultCount2; row2++) {
			const std::string itemStr = PQgetvalue(results2, row2, 1);
			if (itemStr.length() > 0) {
				ItemStack stack;
				stack.deSerialize(itemStr);
				invList->changeItem(pg_to_uint(results2, row2, 0), stack);
			}
		}
		PQclear(results2);
	}

	PQclear(results);

	results = execPrepared("load_player_metadata", 1, values, false);

	int numrows = PQntuples(results);
	for (int row = 0; row < numrows; row++) {
		sao->getMeta().setString(PQgetvalue(results, row, 0), PQgetvalue(results, row, 1));
	}
	sao->getMeta().setModified(false);

	PQclear(results);

	return true;
}

//.........这里部分代码省略.........
		player->hp = hp;
	}
	else if(command == TOCLIENT_MOVE_PLAYER)
	{
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);
		Player *player = m_env.getLocalPlayer();
		assert(player != NULL);
		v3f pos = readV3F1000(is);
		f32 pitch = readF1000(is);
		f32 yaw = readF1000(is);
		player->setPosition(pos);
		/*player->setPitch(pitch);
		player->setYaw(yaw);*/

		infostream<<"Client got TOCLIENT_MOVE_PLAYER"
				<<" pos=("<<pos.X<<","<<pos.Y<<","<<pos.Z<<")"
				<<" pitch="<<pitch
				<<" yaw="<<yaw
				<<std::endl;

		/*
			Add to ClientEvent queue.
			This has to be sent to the main program because otherwise
			it would just force the pitch and yaw values to whatever
			the camera points to.
		*/
		ClientEvent event;
		event.type = CE_PLAYER_FORCE_MOVE;
		event.player_force_move.pitch = pitch;
		event.player_force_move.yaw = yaw;
		m_client_event_queue.push_back(event);

		// Ignore damage for a few seconds, so that the player doesn't
		// get damage from falling on ground
		m_ignore_damage_timer = 3.0;
	}
	else if(command == TOCLIENT_PLAYERITEM)
	{
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);

		u16 count = readU16(is);

		for (u16 i = 0; i < count; ++i) {
			u16 peer_id = readU16(is);
			Player *player = m_env.getPlayer(peer_id);

			if (player == NULL)
			{
				infostream<<"Client: ignoring player item "
					<< deSerializeString(is)
					<< " for non-existing peer id " << peer_id
					<< std::endl;
				continue;
			} else if (player->isLocal()) {
				infostream<<"Client: ignoring player item "
					<< deSerializeString(is)
					<< " for local player" << std::endl;
				continue;
			} else {
				InventoryList *inv = player->inventory.getList("main");
				std::string itemstring(deSerializeString(is));
				if (itemstring.empty()) {
					inv->deleteItem(0);
					infostream
						<<"Client: empty player item for peer "
						<< peer_id << std::endl;
				} else {
					std::istringstream iss(itemstring);
					delete inv->changeItem(0, InventoryItem::deSerialize(iss));
					infostream<<"Client: player item for peer " << peer_id << ": ";
					player->getWieldItem()->serialize(infostream);
					infostream<<std::endl;
				}
			}
		}
	}
	else if(command == TOCLIENT_DEATHSCREEN)
	{
		std::string datastring((char*)&data[2], datasize-2);
		std::istringstream is(datastring, std::ios_base::binary);

		bool set_camera_point_target = readU8(is);
		v3f camera_point_target = readV3F1000(is);

		ClientEvent event;
		event.type = CE_DEATHSCREEN;
		event.deathscreen.set_camera_point_target = set_camera_point_target;
		event.deathscreen.camera_point_target_x = camera_point_target.X;
		event.deathscreen.camera_point_target_y = camera_point_target.Y;
		event.deathscreen.camera_point_target_z = camera_point_target.Z;
		m_client_event_queue.push_back(event);
	}
	else
	{
		infostream<<"Client: Ignoring unknown command "
				<<command<<std::endl;
	}
}