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authorAlexander Harkness <bearbin@gmail.com>2013-11-24 15:19:41 +0100
committerAlexander Harkness <bearbin@gmail.com>2013-11-24 15:19:41 +0100
commit675b4aa878f16291ce33fced48a2bc7425f635ae (patch)
tree409914df27a98f65adf866da669429c4de141b6f /src/BlockEntities/HopperEntity.cpp
parentLineBlockTracer: Using the coord-based block faces. (diff)
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Diffstat (limited to 'src/BlockEntities/HopperEntity.cpp')
-rw-r--r--src/BlockEntities/HopperEntity.cpp566
1 files changed, 566 insertions, 0 deletions
diff --git a/src/BlockEntities/HopperEntity.cpp b/src/BlockEntities/HopperEntity.cpp
new file mode 100644
index 000000000..41849b1b3
--- /dev/null
+++ b/src/BlockEntities/HopperEntity.cpp
@@ -0,0 +1,566 @@
+
+// HopperEntity.cpp
+
+// Implements the cHopperEntity representing a hopper block entity
+
+#include "Globals.h"
+#include "HopperEntity.h"
+#include "../Chunk.h"
+#include "../Entities/Player.h"
+#include "../PluginManager.h"
+#include "ChestEntity.h"
+#include "DropSpenserEntity.h"
+#include "FurnaceEntity.h"
+
+
+
+
+
+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),
+ m_LastMoveItemsInTick(0),
+ m_LastMoveItemsOutTick(0)
+{
+}
+
+
+
+
+
+/** Returns the block coords of the block receiving the output items, based on the meta
+Returns false if unattached
+*/
+bool cHopperEntity::GetOutputBlockPos(NIBBLETYPE a_BlockMeta, int & a_OutputX, int & a_OutputY, int & a_OutputZ)
+{
+ a_OutputX = m_PosX;
+ a_OutputY = m_PosY;
+ a_OutputZ = m_PosZ;
+ switch (a_BlockMeta)
+ {
+ case E_META_HOPPER_FACING_XM: a_OutputX--; return true;
+ case E_META_HOPPER_FACING_XP: a_OutputX++; return true;
+ case E_META_HOPPER_FACING_YM: a_OutputY--; return true;
+ case E_META_HOPPER_FACING_ZM: a_OutputZ--; return true;
+ case E_META_HOPPER_FACING_ZP: a_OutputZ++; return true;
+ default:
+ {
+ // Not attached
+ return false;
+ }
+ }
+}
+
+
+
+
+
+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_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:
+ {
+ // Chests have special handling because of double-chests
+ res = MoveItemsFromChest(a_Chunk);
+ break;
+ }
+ case E_BLOCK_LIT_FURNACE:
+ case E_BLOCK_FURNACE:
+ {
+ // Furnaces have special handling because only the output and leftover fuel buckets shall be moved
+ res = MoveItemsFromFurnace(a_Chunk);
+ break;
+ }
+ case E_BLOCK_DISPENSER:
+ case E_BLOCK_DROPPER:
+ case E_BLOCK_HOPPER:
+ {
+ res = MoveItemsFromGrid(*(cBlockEntityWithItems *)a_Chunk.GetBlockEntity(m_PosX, m_PosY + 1, m_PosZ));
+ 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;
+ }
+
+ int bx, by, bz;
+ NIBBLETYPE Meta = a_Chunk.GetMeta(m_RelX, m_PosY, m_RelZ);
+ if (!GetOutputBlockPos(Meta, bx, by, bz))
+ {
+ // Not attached to another container
+ return false;
+ }
+ if (by < 0)
+ {
+ // Cannot output below the zero-th block level
+ return false;
+ }
+
+ // Convert coords to relative:
+ int rx = bx - a_Chunk.GetPosX() * cChunkDef::Width;
+ int rz = bz - a_Chunk.GetPosZ() * cChunkDef::Width;
+ cChunk * DestChunk = a_Chunk.GetRelNeighborChunkAdjustCoords(rx, rz);
+ if (DestChunk == NULL)
+ {
+ // The destination chunk has been unloaded, don't tick
+ return false;
+ }
+
+ // Call proper moving function, based on the blocktype present at the coords:
+ bool res = false;
+ switch (DestChunk->GetBlock(rx, by, rz))
+ {
+ case E_BLOCK_CHEST:
+ {
+ // Chests have special handling because of double-chests
+ res = MoveItemsToChest(*DestChunk, bx, by, bz);
+ break;
+ }
+ case E_BLOCK_LIT_FURNACE:
+ case E_BLOCK_FURNACE:
+ {
+ // Furnaces have special handling because of the direction-to-slot relation
+ res = MoveItemsToFurnace(*DestChunk, bx, by, bz, Meta);
+ break;
+ }
+ case E_BLOCK_DISPENSER:
+ case E_BLOCK_DROPPER:
+ case E_BLOCK_HOPPER:
+ {
+ res = MoveItemsToGrid(*(cBlockEntityWithItems *)DestChunk->GetBlockEntity(bx, by, bz));
+ break;
+ }
+ }
+
+ // If the item has been moved, reset the last tick:
+ if (res)
+ {
+ m_LastMoveItemsOutTick = a_CurrentTick;
+ }
+
+ return res;
+}
+
+
+
+
+
+/// 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)))
+ {
+ // 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)))
+ {
+ 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)
+{
+ cFurnaceEntity * Furnace = (cFurnaceEntity *)a_Chunk.GetBlockEntity(m_PosX, m_PosY + 1, m_PosZ);
+ ASSERT(Furnace != NULL);
+
+ // 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;
+}
+
+
+
+
+
+bool cHopperEntity::MoveItemsFromGrid(cBlockEntityWithItems & a_Entity)
+{
+ cItemGrid & Grid = a_Entity.GetContents();
+ int NumSlots = Grid.GetNumSlots();
+
+ // First try adding items of types already in the hopper:
+ for (int i = 0; i < NumSlots; i++)
+ {
+ if (Grid.IsSlotEmpty(i))
+ {
+ continue;
+ }
+ if (MoveItemsFromSlot(a_Entity, i, false))
+ {
+ 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 (Grid.IsSlotEmpty(i))
+ {
+ continue;
+ }
+ if (MoveItemsFromSlot(a_Entity, i, true))
+ {
+ Grid.ChangeSlotCount(i, -1);
+ return true;
+ }
+ }
+ return false;
+}
+
+
+
+
+
+/// Moves one piece of the specified a_Entity's slot itemstack into this hopper. Returns true if contents have changed. Doesn't change the itemstack.
+bool cHopperEntity::MoveItemsFromSlot(cBlockEntityWithItems & a_Entity, int a_SlotNum, bool a_AllowNewStacks)
+{
+ cItem One(a_Entity.GetSlot(a_SlotNum).CopyOne());
+ for (int i = 0; i < ContentsWidth * ContentsHeight; i++)
+ {
+ if (m_Contents.IsSlotEmpty(i))
+ {
+ if (a_AllowNewStacks)
+ {
+ if (cPluginManager::Get()->CallHookHopperPullingItem(*m_World, *this, i, a_Entity, a_SlotNum))
+ {
+ // Plugin disagrees with the move
+ continue;
+ }
+ }
+ m_Contents.SetSlot(i, One);
+ return true;
+ }
+ else if (m_Contents.GetSlot(i).IsStackableWith(One))
+ {
+ if (cPluginManager::Get()->CallHookHopperPullingItem(*m_World, *this, i, a_Entity, a_SlotNum))
+ {
+ // Plugin disagrees with the move
+ continue;
+ }
+
+ m_Contents.ChangeSlotCount(i, 1);
+ return true;
+ }
+ }
+ return false;
+}
+
+
+
+
+
+/// Moves items to the chest at the specified coords. Returns true if contents have changed
+bool cHopperEntity::MoveItemsToChest(cChunk & a_Chunk, int a_BlockX, int a_BlockY, int a_BlockZ)
+{
+ // Try the chest directly connected to the hopper:
+ if (MoveItemsToGrid(*(cChestEntity *)a_Chunk.GetBlockEntity(a_BlockX, a_BlockY, a_BlockZ)))
+ {
+ return true;
+ }
+
+ // Check if the chest is a double-chest, if so, try to move into the other half:
+ 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 (MoveItemsToGrid(*(cChestEntity *)Neighbor->GetBlockEntity(a_BlockX, a_BlockY, a_BlockZ)))
+ {
+ return true;
+ }
+ return false;
+ }
+
+ // The chest was single and nothing could be moved
+ return false;
+}
+
+
+
+
+
+/// Moves items to the furnace at the specified coords. Returns true if contents have changed
+bool cHopperEntity::MoveItemsToFurnace(cChunk & a_Chunk, int a_BlockX, int a_BlockY, int a_BlockZ, NIBBLETYPE a_HopperMeta)
+{
+ cFurnaceEntity * Furnace = (cFurnaceEntity *)a_Chunk.GetBlockEntity(a_BlockX, a_BlockY, a_BlockZ);
+ if (a_HopperMeta == E_META_HOPPER_FACING_YM)
+ {
+ // Feed the input slot of the furnace
+ return MoveItemsToSlot(*Furnace, cFurnaceEntity::fsInput);
+ }
+ else
+ {
+ // Feed the fuel slot of the furnace
+ return MoveItemsToSlot(*Furnace, cFurnaceEntity::fsFuel);
+ }
+ return false;
+}
+
+
+
+
+
+bool cHopperEntity::MoveItemsToGrid(cBlockEntityWithItems & a_Entity)
+{
+ // Iterate through our slots, try to move from each one:
+ int NumSlots = a_Entity.GetContents().GetNumSlots();
+ for (int i = 0; i < NumSlots; i++)
+ {
+ if (MoveItemsToSlot(a_Entity, i))
+ {
+ return true;
+ }
+ }
+ return false;
+}
+
+
+
+
+
+bool cHopperEntity::MoveItemsToSlot(cBlockEntityWithItems & a_Entity, int a_DstSlotNum)
+{
+ cItemGrid & Grid = a_Entity.GetContents();
+ if (Grid.IsSlotEmpty(a_DstSlotNum))
+ {
+ // The slot is empty, move the first non-empty slot from our contents:
+ for (int i = 0; i < ContentsWidth * ContentsHeight; i++)
+ {
+ if (!m_Contents.IsSlotEmpty(i))
+ {
+ if (cPluginManager::Get()->CallHookHopperPushingItem(*m_World, *this, i, a_Entity, a_DstSlotNum))
+ {
+ // A plugin disagrees with the move
+ continue;
+ }
+ Grid.SetSlot(a_DstSlotNum, m_Contents.GetSlot(i).CopyOne());
+ m_Contents.ChangeSlotCount(i, -1);
+ return true;
+ }
+ }
+ return false;
+ }
+ else
+ {
+ // The slot is taken, try to top it up:
+ const cItem & DestSlot = Grid.GetSlot(a_DstSlotNum);
+ if (DestSlot.IsFullStack())
+ {
+ return false;
+ }
+ for (int i = 0; i < ContentsWidth * ContentsHeight; i++)
+ {
+ if (m_Contents.GetSlot(i).IsStackableWith(DestSlot))
+ {
+ if (cPluginManager::Get()->CallHookHopperPushingItem(*m_World, *this, i, a_Entity, a_DstSlotNum))
+ {
+ // A plugin disagrees with the move
+ continue;
+ }
+ Grid.ChangeSlotCount(a_DstSlotNum, 1);
+ m_Contents.ChangeSlotCount(i, -1);
+ return true;
+ }
+ }
+ return false;
+ }
+}
+
+
+
+