127 lines
3.1 KiB
C++
127 lines
3.1 KiB
C++
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#pragma once
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#include "BlockHandler.h"
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class cBlockSnowHandler :
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public cBlockHandler
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{
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public:
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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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cBlockSnowHandler(BLOCKTYPE a_BlockType)
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: cBlockHandler(a_BlockType)
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{
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}
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virtual bool GetPlacementBlockTypeMeta(
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cChunkInterface & a_ChunkInterface, cPlayer & a_Player,
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int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
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int a_CursorX, int a_CursorY, int a_CursorZ,
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BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
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) override
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{
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a_BlockType = m_BlockType;
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BLOCKTYPE BlockBeforePlacement;
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NIBBLETYPE MetaBeforePlacement;
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a_ChunkInterface.GetBlockTypeMeta({a_BlockX, a_BlockY, a_BlockZ}, BlockBeforePlacement, MetaBeforePlacement);
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if ((BlockBeforePlacement == E_BLOCK_SNOW) && (MetaBeforePlacement < FullBlockMeta))
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{
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// Only increment if:
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// - A snow block was already there (not first time placement) AND
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// - Height is smaller than the maximum possible
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a_BlockMeta = MetaBeforePlacement + 1;
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return true;
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}
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// First time placement, check placement is valid
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a_BlockMeta = 0;
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BLOCKTYPE BlockBelow;
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NIBBLETYPE MetaBelow;
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return (
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(a_BlockY > 0) &&
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a_ChunkInterface.GetBlockTypeMeta({a_BlockX, a_BlockY - 1, a_BlockZ}, BlockBelow, MetaBelow) &&
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CanBeOn(BlockBelow, MetaBelow)
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);
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}
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virtual bool DoesIgnoreBuildCollision(cChunkInterface & a_ChunkInterface, Vector3i a_Pos, cPlayer & a_Player, NIBBLETYPE a_Meta) override
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{
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if ((a_Player.GetEquippedItem().m_ItemType == E_BLOCK_SNOW) && (a_Meta < FullBlockMeta))
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{
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return true; // If a player is holding a (thin) snow block and it's size can be increased, return collision ignored
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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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return false;
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}
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virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override
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{
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a_Pickups.push_back(cItem(E_ITEM_SNOWBALL, 1, 0));
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}
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virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
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{
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if (a_RelY > 0)
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{
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BLOCKTYPE BlockBelow = a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ);
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NIBBLETYPE MetaBelow = a_Chunk.GetMeta(a_RelX, a_RelY - 1, a_RelZ);
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return CanBeOn(BlockBelow, MetaBelow);
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}
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return false;
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}
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virtual bool DoesDropOnUnsuitable(void) override
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{
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return false;
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}
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virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) 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(Vector3d a_Position, const BLOCKTYPE a_BlockType, const NIBBLETYPE a_BlockMeta) override
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{
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return a_Position.y < (cBlockInfo::GetBlockHeight(a_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 slow 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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