122 lines
2.4 KiB
C++
122 lines
2.4 KiB
C++
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#pragma once
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#include "BlockHandler.h"
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class cBlockSnowHandler final :
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public cBlockHandler
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{
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using Super = cBlockHandler;
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public:
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using Super::Super;
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private:
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enum
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{
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FullBlockMeta = 7 // Meta value of a full-height snow block.
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};
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virtual bool DoesIgnoreBuildCollision(const cWorld & a_World, const cItem & a_HeldItem, const Vector3i a_Position, const NIBBLETYPE a_Meta, const eBlockFace a_ClickedBlockFace, const bool a_ClickedDirectly) const override
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{
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if (a_Meta == 0)
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{
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return true; // If at normal snowfall height (lowest), we ignore collision.
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}
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// Special case if a player is holding a (thin) snow block and its size can be increased:
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if ((a_HeldItem.m_ItemType == E_BLOCK_SNOW) && (a_Meta < FullBlockMeta))
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{
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return !a_ClickedDirectly || (a_ClickedBlockFace == BLOCK_FACE_YP); // If clicked an adjacent block, or clicked YP directly, we ignore collision.
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}
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return false;
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}
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virtual cItems ConvertToPickups(const NIBBLETYPE a_BlockMeta, const cItem * const a_Tool) const override
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{
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// No drop unless dug up with a shovel:
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if ((a_Tool == nullptr) || !ItemCategory::IsShovel(a_Tool->m_ItemType))
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{
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return {};
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}
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if (ToolHasSilkTouch(a_Tool))
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{
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return cItem(m_BlockType, 1, 0);
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}
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else
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{
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// Drop as many snowballs as there were "layers" of snow:
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return cItem(E_ITEM_SNOWBALL, 1 + (a_BlockMeta & 0x07), 0);
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}
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}
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virtual bool CanBeAt(const cChunk & a_Chunk, const Vector3i a_Position, const NIBBLETYPE a_Meta) const override
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{
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if (a_Position.y <= 0)
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{
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return false;
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}
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auto BelowPos = a_Position.addedY(-1);
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auto BlockBelow = a_Chunk.GetBlock(BelowPos);
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auto MetaBelow = a_Chunk.GetMeta(BelowPos);
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return CanBeOn(BlockBelow, MetaBelow);
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}
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virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) const override
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{
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UNUSED(a_Meta);
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return 14;
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}
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virtual bool IsInsideBlock(const Vector3d a_RelPosition, const NIBBLETYPE a_BlockMeta) const override
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{
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return a_RelPosition.y < (cBlockInfo::GetBlockHeight(m_BlockType) * (a_BlockMeta & 0x07));
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}
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private:
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/** Returns true if snow can be placed on top of a block with the given type and meta. */
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static bool CanBeOn(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
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{
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// If block below is snowable, or it is a thin snow block and is a full thin snow block, say yay:
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return (
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cBlockInfo::IsSnowable(a_BlockType) ||
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(
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(a_BlockType == E_BLOCK_SNOW) &&
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(a_BlockMeta == FullBlockMeta)
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)
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);
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}
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} ;
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