109 lines
3.3 KiB
C++
109 lines
3.3 KiB
C++
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#pragma once
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#include "ItemHandler.h"
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class cItemSlabHandler:
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public cItemHandler
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{
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using Super = cItemHandler;
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public:
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/** Creates a new handler for the specified slab item type.
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Sets the handler to use the specified doubleslab block type for combining self into doubleslabs. */
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cItemSlabHandler(int a_ItemType, BLOCKTYPE a_DoubleSlabBlockType):
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Super(a_ItemType),
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m_DoubleSlabBlockType(a_DoubleSlabBlockType)
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{
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}
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// cItemHandler overrides:
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virtual bool OnPlayerPlace(
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cWorld & a_World,
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cPlayer & a_Player,
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const cItem & a_EquippedItem,
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const Vector3i a_ClickedBlockPos,
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eBlockFace a_ClickedBlockFace,
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const Vector3i a_CursorPos
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) override
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{
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// If clicking a slab, try combining it into a double-slab:
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BLOCKTYPE ClickedBlockType;
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NIBBLETYPE ClickedBlockMeta;
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a_World.GetBlockTypeMeta(a_ClickedBlockPos, ClickedBlockType, ClickedBlockMeta);
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if (
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(ClickedBlockType == m_ItemType) && // Placing the same slab material
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((ClickedBlockMeta & 0x07) == a_EquippedItem.m_ItemDamage) // Placing the same slab sub-kind (and existing slab is single)
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)
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{
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if (
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((a_ClickedBlockFace == BLOCK_FACE_TOP) && ((ClickedBlockMeta & 0x08) == 0)) || // Top side of a bottom-half-slab
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((a_ClickedBlockFace == BLOCK_FACE_BOTTOM) && ((ClickedBlockMeta & 0x08) != 0)) // Bottom side of a top-half-slab
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)
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{
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if (!a_Player.PlaceBlock(a_ClickedBlockPos.x, a_ClickedBlockPos.y, a_ClickedBlockPos.z, m_DoubleSlabBlockType, ClickedBlockMeta & 0x07))
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{
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return false;
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}
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if (a_Player.IsGameModeSurvival())
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{
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a_Player.GetInventory().RemoveOneEquippedItem();
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}
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return true;
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}
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}
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// If there's already a slab in the destination, combine it into a double-slab:
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auto PlacePos = AddFaceDirection(a_ClickedBlockPos, a_ClickedBlockFace);
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BLOCKTYPE PlaceBlockType;
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NIBBLETYPE PlaceBlockMeta;
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a_World.GetBlockTypeMeta(PlacePos, PlaceBlockType, PlaceBlockMeta);
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if (
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(PlaceBlockType == m_ItemType) && // Placing the same slab material
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((PlaceBlockMeta & 0x07) == a_EquippedItem.m_ItemDamage) // Placing the same slab sub-kind (and existing slab is single)
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)
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{
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if (!a_Player.PlaceBlock(PlacePos.x, PlacePos.y, PlacePos.z, m_DoubleSlabBlockType, PlaceBlockMeta & 0x07))
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{
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return false;
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}
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if (a_Player.IsGameModeSurvival())
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{
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a_Player.GetInventory().RemoveOneEquippedItem();
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}
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return true;
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}
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// The slabs didn't combine, use the default handler to place the slab:
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bool res = Super::OnPlayerPlace(a_World, a_Player, a_EquippedItem, a_ClickedBlockPos, a_ClickedBlockFace, a_CursorPos);
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/*
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The client has a bug when a slab replaces snow and there's a slab above it.
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The client then combines the slab above, rather than replacing the snow.
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We send the block above the currently placed block back to the client to fix the bug.
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Ref.: https://forum.cuberite.org/thread-434-post-17388.html#pid17388
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*/
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if ((a_ClickedBlockFace == BLOCK_FACE_TOP) && (a_ClickedBlockPos.y < cChunkDef::Height - 1))
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{
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auto AbovePos = a_ClickedBlockPos.addedY(1);
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a_Player.SendBlocksAround(AbovePos.x, AbovePos.y, AbovePos.z, 1);
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}
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return res;
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}
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protected:
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/** The block type to use when the slab combines into a doubleslab block. */
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BLOCKTYPE m_DoubleSlabBlockType;
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};
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