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