1 files changed, 291 insertions, 0 deletions

diff --git a/source/BlockEntities/HopperEntity.cpp b/source/BlockEntities/HopperEntity.cpp
new file mode 100644
index 000000000..68974fdd3
--- /dev/null
+++ b/source/BlockEntities/HopperEntity.cpp
@@ -0,0 +1,291 @@
+

+// HopperEntity.cpp

+

+// Implements the cHopperEntity representing a hopper block entity

+

+#include "Globals.h"

+#include "HopperEntity.h"

+#include "../Chunk.h"

+#include "../Player.h"

+#include "ChestEntity.h"

+#include "DropSpenserEntity.h"

+

+

+

+

+

+cHopperEntity::cHopperEntity(int a_BlockX, int a_BlockY, int a_BlockZ) :

+	super(E_BLOCK_HOPPER, a_BlockX, a_BlockY, a_BlockZ, ContentsWidth, ContentsHeight, NULL)

+{

+}

+

+

+

+

+

+cHopperEntity::cHopperEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World) :

+	super(E_BLOCK_HOPPER, a_BlockX, a_BlockY, a_BlockZ, ContentsWidth, ContentsHeight, a_World)

+{

+}

+

+

+

+

+

+bool cHopperEntity::Tick(float a_Dt, cChunk & a_Chunk)

+{

+	Int64 CurrentTick = a_Chunk.GetWorld()->GetWorldAge();

+	

+	bool res = false;

+	res = MoveItemsIn  (a_Chunk, CurrentTick) || res;

+	res = MovePickupsIn(a_Chunk, CurrentTick) || res;

+	res = MoveItemsOut (a_Chunk, CurrentTick) || res;

+	return res;

+}

+

+

+

+

+

+void cHopperEntity::SaveToJson(Json::Value & a_Value)

+{

+	// TODO

+	LOGWARNING("%s: Not implemented yet", __FUNCTION__);

+}

+

+

+

+

+

+void cHopperEntity::SendTo(cClientHandle & a_Client)

+{

+	// The hopper entity doesn't need anything sent to the client when it's created / gets in the viewdistance

+	// All the actual handling is in the cWindow UI code that gets called when the hopper is rclked

+	

+	UNUSED(a_Client);

+}

+

+

+

+

+

+void cHopperEntity::UsedBy(cPlayer * a_Player)

+{

+	// If the window is not created, open it anew:

+	cWindow * Window = GetWindow();

+	if (Window == NULL)

+	{

+		OpenNewWindow();

+		Window = GetWindow();

+	}

+	

+	// Open the window for the player:

+	if (Window != NULL)

+	{

+		if (a_Player->GetWindow() != Window)

+		{

+			a_Player->OpenWindow(Window);

+		}

+	}

+

+	// This is rather a hack

+	// Instead of marking the chunk as dirty upon chest contents change, we mark it dirty now

+	// We cannot properly detect contents change, but such a change doesn't happen without a player opening the chest first.

+	// The few false positives aren't much to worry about

+	int ChunkX, ChunkZ;

+	cChunkDef::BlockToChunk(m_PosX, m_PosY, m_PosZ, ChunkX, ChunkZ);

+	m_World->MarkChunkDirty(ChunkX, ChunkZ);

+}

+

+

+

+

+

+/// Opens a new window UI for this hopper

+void cHopperEntity::OpenNewWindow(void)

+{

+	OpenWindow(new cHopperWindow(m_PosX, m_PosY, m_PosZ, this));

+}

+

+

+

+

+

+/// Moves items from the container above it into this hopper. Returns true if the contents have changed.

+bool cHopperEntity::MoveItemsIn(cChunk & a_Chunk, Int64 a_CurrentTick)

+{

+	if (m_PosY >= cChunkDef::Height)

+	{

+		// This hopper is at the top of the world, no more blocks above

+		return false;

+	}

+

+	if (a_CurrentTick - m_LastMoveItemsInTick < TICKS_PER_TRANSFER)

+	{

+		// Too early after the previous transfer

+		return false;

+	}

+	

+	// Try moving an item in:

+	bool res = false;

+	switch (a_Chunk.GetBlock(m_RelX, m_PosY + 1, m_RelZ))

+	{

+		case E_BLOCK_CHEST:     res = MoveItemsFromChest(a_Chunk); break;

+		case E_BLOCK_FURNACE:   res = MoveItemsFromFurnace(a_Chunk); break;

+		case E_BLOCK_DISPENSER:

+		case E_BLOCK_DROPPER:   res = MoveItemsFromGrid(((cDropSpenserEntity *)a_Chunk.GetBlockEntity(m_PosX, m_PosY + 1, m_PosZ))->GetContents()); break;

+		case E_BLOCK_HOPPER:    res = MoveItemsFromGrid(((cHopperEntity *)     a_Chunk.GetBlockEntity(m_PosX, m_PosY + 1, m_PosZ))->GetContents()); break;

+	}

+	

+	// If the item has been moved, reset the last tick:

+	if (res)

+	{

+		m_LastMoveItemsInTick = a_CurrentTick;

+	}

+	

+	return res;

+}

+

+

+

+

+

+/// Moves pickups from above this hopper into it. Returns true if the contents have changed.

+bool cHopperEntity::MovePickupsIn(cChunk & a_Chunk, Int64 a_CurrentTick)

+{

+	// TODO

+	return false;

+}

+

+

+

+

+

+/// Moves items out from this hopper into the destination. Returns true if the contents have changed.

+bool cHopperEntity::MoveItemsOut(cChunk & a_Chunk, Int64 a_CurrentTick)

+{

+	if (a_CurrentTick - m_LastMoveItemsOutTick < TICKS_PER_TRANSFER)

+	{

+		// Too early after the previous transfer

+		return false;

+	}

+	

+	// TODO

+	return false;

+}

+

+

+

+

+

+/// Moves items from a chest (dblchest) above the hopper into this hopper. Returns true if contents have changed.

+bool cHopperEntity::MoveItemsFromChest(cChunk & a_Chunk)

+{

+	if (MoveItemsFromGrid(((cChestEntity *)a_Chunk.GetBlockEntity(m_PosX, m_PosY + 1, m_PosZ))->GetContents()))

+	{

+		// Moved the item from the chest directly above the hopper

+		return true;

+	}

+	

+	// Check if the chest is a double-chest, if so, try to move from there:

+	static const struct

+	{

+		int x, z;

+	}

+	Coords [] =

+	{

+		{1, 0},

+		{-1, 0},

+		{0, 1},

+		{0, -1},

+	} ;

+	for (int i = 0; i < ARRAYCOUNT(Coords); i++)

+	{

+		int x = m_RelX + Coords[i].x;

+		int z = m_RelZ + Coords[i].z;

+		cChunk * Neighbor = a_Chunk.GetRelNeighborChunkAdjustCoords(x, z);

+		if (

+			(Neighbor == NULL) ||

+			(Neighbor->GetBlock(x, m_PosY + 1, z) != E_BLOCK_CHEST)

+		)

+		{

+			continue;

+		}

+		if (MoveItemsFromGrid(((cChestEntity *)Neighbor->GetBlockEntity(x, m_PosY, z))->GetContents()))

+		{

+			return true;

+		}

+		return false;

+	}

+	

+	// The chest was single and nothing could be moved

+	return false;

+}

+

+

+

+

+

+/// Moves items from a furnace above the hopper into this hopper. Returns true if contents have changed.

+bool cHopperEntity::MoveItemsFromFurnace(cChunk & a_Chunk)

+{

+	// TODO

+	return false;

+}

+

+

+

+

+

+/// Moves items from the specified ItemGrid into this hopper. Returns true if contents have changed.

+bool cHopperEntity::MoveItemsFromGrid(cItemGrid & a_Grid)

+{

+	int NumSlots = a_Grid.GetNumSlots();

+	

+	// First try adding items of types already in the hopper:

+	for (int i = 0; i < NumSlots; i++)

+	{

+		if (a_Grid.IsSlotEmpty(i))

+		{

+			continue;

+		}

+		if (MoveItemsFromSlot(a_Grid.GetSlot(i), false))

+		{

+			a_Grid.ChangeSlotCount(i, -1);

+			return true;

+		}

+	}

+

+	// No already existing stack can be topped up, try again with allowing new stacks:

+	for (int i = 0; i < NumSlots; i++)

+	{

+		if (a_Grid.IsSlotEmpty(i))

+		{

+			continue;

+		}

+		if (MoveItemsFromSlot(a_Grid.GetSlot(i), true))

+		{

+			a_Grid.ChangeSlotCount(i, -1);

+			return true;

+		}

+	}

+	return false;

+}

+

+

+

+

+

+/// Moves one of the specified itemstack into this hopper. Returns true if contents have changed. Doesn't change the itemstack.

+bool cHopperEntity::MoveItemsFromSlot(const cItem & a_ItemStack, bool a_AllowNewStacks)

+{

+	if (m_Contents.AddItem(a_ItemStack.CopyOne(), a_AllowNewStacks) > 0)

+	{

+		return true;

+	}

+	return false;

+}

+

+

+

+