From 03c6bb9f85b929a99df2c800b8ba7d8ef4a8ec43 Mon Sep 17 00:00:00 2001 From: "madmaxoft@gmail.com" 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 ++++++++++++++++++++++++++++++++++ 1 file changed, 291 insertions(+) create mode 100644 source/BlockEntities/HopperEntity.cpp (limited to 'source/BlockEntities/HopperEntity.cpp') 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; +} + + + + -- cgit v1.2.3