From 03c6bb9f85b929a99df2c800b8ba7d8ef4a8ec43 Mon Sep 17 00:00:00 2001
From: "madmaxoft@gmail.com"
<madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>
Date: Thu, 13 Jun 2013 07:36:43 +0000
Subject: Added hopper entity, it can suck items out of chests, dispensers,
droppers and other hopppers above it.
git-svn-id: http://mc-server.googlecode.com/svn/trunk@1587 0a769ca7-a7f5-676a-18bf-c427514a06d6
---
source/BlockEntities/HopperEntity.cpp | 291 ++++++++++++++++++++++++++++++++++
source/BlockEntities/HopperEntity.h | 81 ++++++++++
2 files changed, 372 insertions(+)
create mode 100644 source/BlockEntities/HopperEntity.cpp
create mode 100644 source/BlockEntities/HopperEntity.h
(limited to 'source/BlockEntities')
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;
+}
+
+
+
+
diff --git a/source/BlockEntities/HopperEntity.h b/source/BlockEntities/HopperEntity.h
new file mode 100644
index 000000000..73c2a536c
--- /dev/null
+++ b/source/BlockEntities/HopperEntity.h
@@ -0,0 +1,81 @@
+
+// HopperEntity.h
+
+// Declares the cHopperEntity representing a hopper block entity
+
+
+
+
+
+#pragma once
+
+#include "BlockEntityWithItems.h"
+#include "../UI/WindowOwner.h"
+
+
+
+
+
+class cHopperEntity : // tolua_export
+ public cBlockEntityWindowOwner,
+ // tolua_begin
+ public cBlockEntityWithItems
+{
+ typedef cBlockEntityWithItems super;
+
+public:
+ enum {
+ ContentsHeight = 1,
+ ContentsWidth = 5,
+ TICKS_PER_TRANSFER = 8, ///< How many ticks at minimum between two item transfers to or from the hopper
+ } ;
+
+ /// Constructor used while generating a chunk; sets m_World to NULL
+ cHopperEntity(int a_BlockX, int a_BlockY, int a_BlockZ);
+
+ // tolua_end
+
+ /// Constructor used for normal operation
+ cHopperEntity(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World);
+
+ static const char * GetClassStatic(void) { return "cHopperEntity"; }
+
+protected:
+
+ Int64 m_LastMoveItemsInTick;
+ Int64 m_LastMoveItemsOutTick;
+
+ // cBlockEntity overrides:
+ virtual bool Tick(float a_Dt, cChunk & a_Chunk) override;
+ virtual void SaveToJson(Json::Value & a_Value) override;
+ virtual void SendTo(cClientHandle & a_Client) override;
+ virtual void UsedBy(cPlayer * a_Player) override;
+
+ /// Opens a new chest window for this chest. Scans for neighbors to open a double chest window, if appropriate.
+ void OpenNewWindow(void);
+
+ /// Moves items from the container above it into this hopper. Returns true if the contents have changed.
+ bool MoveItemsIn(cChunk & a_Chunk, Int64 a_CurrentTick);
+
+ /// Moves pickups from above this hopper into it. Returns true if the contents have changed.
+ bool MovePickupsIn(cChunk & a_Chunk, Int64 a_CurrentTick);
+
+ /// Moves items out from this hopper into the destination. Returns true if the contents have changed.
+ bool MoveItemsOut(cChunk & a_Chunk, Int64 a_CurrentTick);
+
+ /// Moves items from a chest (dblchest) above the hopper into this hopper. Returns true if contents have changed.
+ bool MoveItemsFromChest(cChunk & a_Chunk);
+
+ /// Moves items from a furnace above the hopper into this hopper. Returns true if contents have changed.
+ bool MoveItemsFromFurnace(cChunk & a_Chunk);
+
+ /// Moves items from the specified ItemGrid into this hopper. Returns true if contents have changed.
+ bool MoveItemsFromGrid(cItemGrid & a_Grid);
+
+ /// Moves one of the specified itemstack into this hopper. Returns true if contents have changed. Doesn't change the itemstack.
+ bool MoveItemsFromSlot(const cItem & a_ItemStack, bool a_AllowNewStacks);
+} ;
+
+
+
+
--
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