C++ cItem函数代码示例

cItem cItemGrid::RemoveOneItem(int a_SlotNum)
{
	if ((a_SlotNum < 0) || (a_SlotNum >= m_NumSlots))
	{
		LOGWARNING("%s: Invalid slot number %d out of %d slots, ignoring the call, returning empty item",
			__FUNCTION__, a_SlotNum, m_NumSlots
		);
		return cItem();
	}
	
	// If the slot is empty, return an empty item
	if (m_Slots[a_SlotNum].IsEmpty())
	{
		return cItem();
	}
	
	// Make a copy of the item in slot, set count to 1 and remove one from the slot
	cItem res = m_Slots[a_SlotNum];
	res.m_ItemCount = 1;
	m_Slots[a_SlotNum].m_ItemCount -= 1;
	
	// Emptying the slot correctly if appropriate
	if (m_Slots[a_SlotNum].m_ItemCount == 0)
	{
		m_Slots[a_SlotNum].Empty();
	}
	
	// Notify everyone of the change
	TriggerListeners(a_SlotNum);
	
	// Return the stored one item
	return res;
}

void cSlotAreaAnvil::OnTakeResult(cPlayer & a_Player)
{
	if (!a_Player.IsGameModeCreative())
	{
		a_Player.DeltaExperience(-cPlayer::XpForLevel(m_MaximumCost));
	}
	SetSlot(0, a_Player, cItem());

	if (m_StackSizeToBeUsedInRepair > 0)
	{
		const cItem * Item = GetSlot(1, a_Player);
		if (!Item->IsEmpty() && (Item->m_ItemCount > m_StackSizeToBeUsedInRepair))
		{
			cItem NewSecondItem(*Item);
			NewSecondItem.m_ItemCount -= m_StackSizeToBeUsedInRepair;
			m_StackSizeToBeUsedInRepair = 0;
			SetSlot(1, a_Player, NewSecondItem);
		}
		else
		{
			SetSlot(1, a_Player, cItem());
		}
	}
	else
	{
		SetSlot(1, a_Player, cItem());
	}
	m_ParentWindow.SetProperty(0, m_MaximumCost, a_Player);

	m_MaximumCost = 0;
	((cAnvilWindow*)&m_ParentWindow)->SetRepairedItemName("", NULL);

	int PosX, PosY, PosZ;
	((cAnvilWindow*)&m_ParentWindow)->GetBlockPos(PosX, PosY, PosZ);

	BLOCKTYPE Block;
	NIBBLETYPE BlockMeta;
	a_Player.GetWorld()->GetBlockTypeMeta(PosX, PosY, PosZ, Block, BlockMeta);

	cFastRandom Random;
	if (!a_Player.IsGameModeCreative() && (Block == E_BLOCK_ANVIL) && (Random.NextFloat(1.0F) < 0.12F))
	{
		NIBBLETYPE Orientation = BlockMeta & 0x3;
		NIBBLETYPE AnvilDamage = BlockMeta >> 2;
		++AnvilDamage;

		if (AnvilDamage > 2)
		{
			// Anvil will break
			a_Player.GetWorld()->SetBlock(PosX, PosY, PosZ, E_BLOCK_AIR, (NIBBLETYPE)0);
			a_Player.GetWorld()->BroadcastSoundParticleEffect(1020, PosX, PosY, PosZ, 0);
			a_Player.CloseWindow(false);
		}
		else
		{
			a_Player.GetWorld()->SetBlockMeta(PosX, PosY, PosZ, Orientation | (AnvilDamage << 2));
			a_Player.GetWorld()->BroadcastSoundParticleEffect(1021, PosX, PosY, PosZ, 0);
		}
	}

bool cMinecart::DoTakeDamage(TakeDamageInfo & TDI)
{
	if ((TDI.Attacker != nullptr) && TDI.Attacker->IsPlayer() && static_cast<cPlayer *>(TDI.Attacker)->IsGameModeCreative())
	{
		Destroy();
		TDI.FinalDamage = GetMaxHealth();  // Instant hit for creative
		SetInvulnerableTicks(0);
		return super::DoTakeDamage(TDI);  // No drops for creative
	}

	m_LastDamage = TDI.FinalDamage;
	if (!super::DoTakeDamage(TDI))
	{
		return false;
	}

	m_World->BroadcastEntityMetadata(*this);

	if (GetHealth() <= 0)
	{
		Destroy();

		cItems Drops;
		switch (m_Payload)
		{
			case mpNone:
			{
				Drops.push_back(cItem(E_ITEM_MINECART, 1, 0));
				break;
			}
			case mpChest:
			{
				Drops.push_back(cItem(E_ITEM_CHEST_MINECART, 1, 0));
				break;
			}
			case mpFurnace:
			{
				Drops.push_back(cItem(E_ITEM_FURNACE_MINECART, 1, 0));
				break;
			}
			case mpTNT:
			{
				Drops.push_back(cItem(E_ITEM_MINECART_WITH_TNT, 1, 0));
				break;
			}
			case mpHopper:
			{
				Drops.push_back(cItem(E_ITEM_MINECART_WITH_HOPPER, 1, 0));
				break;
			}
		}

		m_World->SpawnItemPickups(Drops, GetPosX(), GetPosY(), GetPosZ());
	}
	return true;
}

void cMinecart::DoTakeDamage(TakeDamageInfo & TDI)
{
	m_LastDamage = TDI.FinalDamage;
	super::DoTakeDamage(TDI);

	m_World->BroadcastEntityMetadata(*this);

	if (GetHealth() <= 0)
	{
		Destroy(true);
		
		cItems Drops;
		switch (m_Payload)
		{
			case mpNone:
			{
				Drops.push_back(cItem(E_ITEM_MINECART, 1, 0));
				break;
			}
			case mpChest:
			{
				Drops.push_back(cItem(E_ITEM_CHEST_MINECART, 1, 0));
				break;
			}
			case mpFurnace:
			{
				Drops.push_back(cItem(E_ITEM_FURNACE_MINECART, 1, 0));
				break;
			}
			case mpTNT:
			{
				Drops.push_back(cItem(E_ITEM_MINECART_WITH_TNT, 1, 0));
				break;
			}
			case mpHopper:
			{
				Drops.push_back(cItem(E_ITEM_MINECART_WITH_HOPPER, 1, 0));
				break;
			}
			default:
			{
				ASSERT(!"Unhandled minecart type when spawning pickup!");
				return;
			}
		}
		
		m_World->SpawnItemPickups(Drops, GetPosX(), GetPosY(), GetPosZ());
	}
}

void cChicken::Tick(std::chrono::milliseconds a_Dt, cChunk & a_Chunk)
{
	super::Tick(a_Dt, a_Chunk);
	if (!IsTicking())
	{
		// The base class tick destroyed us
		return;
	}

	if (IsBaby())
	{
		return;  // Babies don't lay eggs
	}

	if (
		((m_EggDropTimer == 6000) && GetRandomProvider().RandBool()) ||
		m_EggDropTimer == 12000
	)
	{
		cItems Drops;
		m_EggDropTimer = 0;
		Drops.push_back(cItem(E_ITEM_EGG, 1));
		m_World->SpawnItemPickups(Drops, GetPosX(), GetPosY(), GetPosZ(), 10);
	}
	else
	{
		m_EggDropTimer++;
	}
}

void cGameServer::doNpcFill(int id)
{
    if(player[id].type!=NPC)
        return;


    cItem item;
    int slot=0;
    //clear any items already in inventory
    for(int i=0; i<MAX_INV; i++)
        if(player[id].inventory[i]>-1)
        {
            ml_items.item[player[id].inventory[i]]=cItem();
            player[id].inventory[i]=-1;
        }
    for(int i=0; i<MAX_INV; i++)
    {
        if(	ml_loot.loot[player[id].player_template].loot[i].qty!=0 &&
                ((rand()%1000)+1)<=ml_loot.loot[player[id].player_template].loot[i].chance)
        {
            item = mil[ml_loot.loot[player[id].player_template].loot[i].index];
            item.qty=ml_loot.loot[player[id].player_template].loot[i].qty;
            player[id].inventory[slot]=ml_items.addInventoryItem(id,slot,item);
            slot++;
        }
    }

}

void cFurnaceEntity::BurnNewFuel(void)
{
	cFurnaceRecipe * FR = cRoot::Get()->GetFurnaceRecipe();
	int NewTime = FR->GetBurnTime(m_Contents.GetSlot(fsFuel));
	if (NewTime == 0)
	{
		// The item in the fuel slot is not suitable
		m_FuelBurnTime = 0;
		m_TimeBurned = 0;
		SetIsCooking(false);
		return;
	}
	
	// Is the input and output ready for cooking?
	if (!CanCookInputToOutput())
	{
		return;
	}

	// Burn one new fuel:
	m_FuelBurnTime = NewTime;
	m_TimeBurned = 0;
	SetIsCooking(true);
	if (m_Contents.GetSlot(fsFuel).m_ItemType == E_ITEM_LAVA_BUCKET)
	{
		m_Contents.SetSlot(fsFuel, cItem(E_ITEM_BUCKET));
	}
	else
	{
		m_Contents.ChangeSlotCount(fsFuel, -1);
	}
}

void cSheep::OnRightClicked(cPlayer & a_Player)
{
	if ((a_Player.GetEquippedItem().m_ItemType == E_ITEM_SHEARS) && (!m_IsSheared))
	{
		m_IsSheared = true;
		m_World->BroadcastEntityMetadata(*this);

		if (!a_Player.IsGameModeCreative())
		{
			a_Player.UseEquippedItem();
		}

		cItems Drops;
		int NumDrops = m_World->GetTickRandomNumber(2) + 1;
		Drops.push_back(cItem(E_BLOCK_WOOL, NumDrops, m_WoolColor));
		m_World->SpawnItemPickups(Drops, GetPosX(), GetPosY(), GetPosZ(), 10);
	}
	if ((a_Player.GetEquippedItem().m_ItemType == E_ITEM_DYE) && (m_WoolColor != 15 - a_Player.GetEquippedItem().m_ItemDamage))
	{
		m_WoolColor = 15 - a_Player.GetEquippedItem().m_ItemDamage;
		if (!a_Player.IsGameModeCreative())
		{
			a_Player.GetInventory().RemoveOneEquippedItem();
		}
		m_World->BroadcastEntityMetadata(*this);
	}
}

void cSheep::GetDrops(cItems & a_Drops, cEntity * a_Killer)
{
	if (!m_IsSheared)
	{
		a_Drops.push_back(cItem(E_BLOCK_WOOL, 1, m_WoolColor));
	}
}

void cMooshroom::OnRightClicked(cPlayer & a_Player)
{
	switch (a_Player.GetEquippedItem().m_ItemType)
	{
		case E_ITEM_BUCKET:
		{
			if (!a_Player.IsGameModeCreative())
			{
				a_Player.GetInventory().RemoveOneEquippedItem();
				a_Player.GetInventory().AddItem(E_ITEM_MILK);
			}
		} break;
		case E_ITEM_BOWL:
		{
			if (!a_Player.IsGameModeCreative())
			{
				a_Player.GetInventory().RemoveOneEquippedItem();
				a_Player.GetInventory().AddItem(E_ITEM_MUSHROOM_SOUP);
			}
		} break;
		case E_ITEM_SHEARS:
		{
			if (!a_Player.IsGameModeCreative())
			{
				a_Player.UseEquippedItem();
			}

			cItems Drops;
			Drops.push_back(cItem(E_BLOCK_RED_MUSHROOM, 5, 0));
			m_World->SpawnItemPickups(Drops, GetPosX(), GetPosY(), GetPosZ(), 10);
			m_World->SpawnMob(GetPosX(), GetPosY(), GetPosZ(), mtCow, false);
			Destroy();
		} break;
	}
}

void cPainting::GetDrops(cItems & a_Items, cEntity * a_Killer)
{
	if ((a_Killer != nullptr) && a_Killer->IsPlayer() && !static_cast<cPlayer *>(a_Killer)->IsGameModeCreative())
	{
		a_Items.push_back(cItem(E_ITEM_PAINTING));
	}
}

void cSheep::OnRightClicked(cPlayer & a_Player)
{
	const cItem & EquippedItem = a_Player.GetEquippedItem();
	if ((EquippedItem.m_ItemType == E_ITEM_SHEARS) && !IsSheared() && !IsBaby())
	{
		m_IsSheared = true;
		m_World->BroadcastEntityMetadata(*this);
		a_Player.UseEquippedItem();

		cItems Drops;
		int NumDrops = m_World->GetTickRandomNumber(2) + 1;
		Drops.push_back(cItem(E_BLOCK_WOOL, NumDrops, m_WoolColor));
		m_World->SpawnItemPickups(Drops, GetPosX(), GetPosY(), GetPosZ(), 10);
		m_World->BroadcastSoundEffect("mob.sheep.shear", GetPosX(), GetPosY(), GetPosZ(), 1.0f, 1.0f);
	}
	else if ((EquippedItem.m_ItemType == E_ITEM_DYE) && (m_WoolColor != 15 - EquippedItem.m_ItemDamage))
	{
		m_WoolColor = 15 - EquippedItem.m_ItemDamage;
		if (!a_Player.IsGameModeCreative())
		{
			a_Player.GetInventory().RemoveOneEquippedItem();
		}
		m_World->BroadcastEntityMetadata(*this);
	}
}

void cFurnaceEntity::BurnNewFuel(void)
{
	cFurnaceRecipe * FR = cRoot::Get()->GetFurnaceRecipe();
	int NewTime = FR->GetBurnTime(m_Contents.GetSlot(fsFuel));
	if ((NewTime == 0) || !CanCookInputToOutput())
	{
		// The item in the fuel slot is not suitable
		// or the input and output isn't available for cooking
		SetBurnTimes(0, 0);
		SetIsCooking(false);
		return;
	}

	// Burn one new fuel:
	SetBurnTimes(NewTime, 0);
	SetIsCooking(true);
	if (m_Contents.GetSlot(fsFuel).m_ItemType == E_ITEM_LAVA_BUCKET)
	{
		m_Contents.SetSlot(fsFuel, cItem(E_ITEM_BUCKET));
	}
	else
	{
		m_Contents.ChangeSlotCount(fsFuel, -1);
	}
}

void cItemFrame::GetDrops(cItems & a_Items, cEntity * a_Killer)
{
	if ((a_Killer != NULL) && a_Killer->IsPlayer() && !((cPlayer *)a_Killer)->IsGameModeCreative())
	{
		a_Items.push_back(cItem(E_ITEM_ITEM_FRAME));
	}
}

/// Moves items from a furnace above the hopper into this hopper. Returns true if contents have changed.
bool cHopperEntity::MoveItemsFromFurnace(cChunk & a_Chunk)
{
	cFurnaceEntity * Furnace = (cFurnaceEntity *)a_Chunk.GetBlockEntity(m_PosX, m_PosY + 1, m_PosZ);
	if (Furnace == NULL)
	{
		LOGWARNING("%s: A furnace entity was not found where expected, at {%d, %d, %d}", __FUNCTION__, m_PosX, m_PosY + 1, m_PosZ);
		return false;
	}
	
	// Try move from the output slot:
	if (MoveItemsFromSlot(*Furnace, cFurnaceEntity::fsOutput, true))
	{
		cItem NewOutput(Furnace->GetOutputSlot());
		Furnace->SetOutputSlot(NewOutput.AddCount(-1));
		return true;
	}
	
	// No output moved, check if we can move an empty bucket out of the fuel slot:
	if (Furnace->GetFuelSlot().m_ItemType == E_ITEM_BUCKET)
	{
		if (MoveItemsFromSlot(*Furnace, cFurnaceEntity::fsFuel, true))
		{
			Furnace->SetFuelSlot(cItem());
			return true;
		}
	}
	
	// Nothing can be moved
	return false;
}