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#pragma once
#include "BlockHandler.h"
class cBlockSnowHandler :
public cBlockHandler
{
public:
enum
{
FullBlockMeta = 7 // Meta value of a full-height snow block
};
cBlockSnowHandler(BLOCKTYPE a_BlockType)
: cBlockHandler(a_BlockType)
{
}
virtual bool GetPlacementBlockTypeMeta(
cChunkInterface & a_ChunkInterface, cPlayer & a_Player,
int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
int a_CursorX, int a_CursorY, int a_CursorZ,
BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
) override
{
a_BlockType = m_BlockType;
BLOCKTYPE BlockBeforePlacement;
NIBBLETYPE MetaBeforePlacement;
a_ChunkInterface.GetBlockTypeMeta({a_BlockX, a_BlockY, a_BlockZ}, 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_BlockY > 0) &&
a_ChunkInterface.GetBlockTypeMeta({a_BlockX, a_BlockY - 1, a_BlockZ}, BlockBelow, MetaBelow) &&
CanBeOn(BlockBelow, MetaBelow)
);
}
virtual bool DoesIgnoreBuildCollision(cChunkInterface & a_ChunkInterface, Vector3i a_Pos, cPlayer & a_Player, NIBBLETYPE a_Meta) 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) 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, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
{
if (a_RelY > 0)
{
BLOCKTYPE BlockBelow = a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ);
NIBBLETYPE MetaBelow = a_Chunk.GetMeta(a_RelX, a_RelY - 1, a_RelZ);
return CanBeOn(BlockBelow, MetaBelow);
}
return false;
}
virtual bool DoesDropOnUnsuitable(void) override
{
return false;
}
virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) override
{
UNUSED(a_Meta);
return 14;
}
virtual bool IsInsideBlock(Vector3d a_Position, const BLOCKTYPE a_BlockType, const NIBBLETYPE a_BlockMeta) override
{
return a_Position.y < (cBlockInfo::GetBlockHeight(a_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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