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#pragma once
#include "BlockHandler.h"
class cBlockSnowHandler :
public cBlockHandler
{
using Super = cBlockHandler;
public:
using Super::Super;
private:
enum
{
FullBlockMeta = 7 // Meta value of a full-height snow block
};
virtual bool GetPlacementBlockTypeMeta(
cChunkInterface & a_ChunkInterface,
cPlayer & a_Player,
const Vector3i a_PlacedBlockPos,
eBlockFace a_ClickedBlockFace,
const Vector3i a_CursorPos,
BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
) const override
{
a_BlockType = m_BlockType;
// Check if incrementing existing snow height:
BLOCKTYPE BlockBeforePlacement;
NIBBLETYPE MetaBeforePlacement;
a_ChunkInterface.GetBlockTypeMeta(a_PlacedBlockPos, BlockBeforePlacement, MetaBeforePlacement);
if ((BlockBeforePlacement == E_BLOCK_SNOW) && (MetaBeforePlacement < FullBlockMeta))
{
// Only increment if:
// - A snow block was already there (not first time placement) AND
// - Height is smaller than the maximum possible
a_BlockMeta = MetaBeforePlacement + 1;
return true;
}
// First time placement, check placement is valid
a_BlockMeta = 0;
BLOCKTYPE BlockBelow;
NIBBLETYPE MetaBelow;
return (
(a_PlacedBlockPos.y > 0) &&
a_ChunkInterface.GetBlockTypeMeta(a_PlacedBlockPos.addedY(-1), BlockBelow, MetaBelow) &&
CanBeOn(BlockBelow, MetaBelow)
);
}
virtual bool DoesIgnoreBuildCollision(cChunkInterface & a_ChunkInterface, Vector3i a_Pos, cPlayer & a_Player, NIBBLETYPE a_Meta) const override
{
if ((a_Player.GetEquippedItem().m_ItemType == E_BLOCK_SNOW) && (a_Meta < FullBlockMeta))
{
return true; // If a player is holding a (thin) snow block and it's size can be increased, return collision ignored
}
if (a_Meta == 0)
{
return true; // If at normal snowfall height (lowest), we ignore collision
}
return false;
}
virtual cItems ConvertToPickups(NIBBLETYPE a_BlockMeta, cBlockEntity * a_BlockEntity, const cEntity * a_Digger, const cItem * 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(cChunkInterface & a_ChunkInterface, const Vector3i a_RelPos, const cChunk & a_Chunk) const override
{
if (a_RelPos.y <= 0)
{
return false;
}
auto BelowPos = a_RelPos.addedY(-1);
auto BlockBelow = a_Chunk.GetBlock(BelowPos);
auto MetaBelow = a_Chunk.GetMeta(BelowPos);
return CanBeOn(BlockBelow, MetaBelow);
}
virtual bool DoesDropOnUnsuitable(void) const override
{
return false;
}
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 slow 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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