path: root/src/Blocks/BlockTrapdoor.h

#pragma once

#include "BlockHandler.h"





class cBlockTrapdoorHandler :
	public cBlockHandler
{
public:
	cBlockTrapdoorHandler(BLOCKTYPE a_BlockType)
		: cBlockHandler(a_BlockType)
	{
	}

	virtual const char * GetStepSound(void) override
	{
		return "step.wood";
	}

	virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override
	{
		// Reset meta to 0
		a_Pickups.push_back(cItem(m_BlockType, 1, 0));
	}

	virtual bool IsUseable(void) override
	{
		return true;
	}

	virtual void OnUse(cWorld * a_World, cPlayer * a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ) override
	{
		// Flip the ON bit on/off using the XOR bitwise operation
		NIBBLETYPE Meta = (a_World->GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ) ^ 0x04);

		a_World->SetBlockMeta(a_BlockX, a_BlockY, a_BlockZ, Meta);
	}

	virtual bool GetPlacementBlockTypeMeta(
		cWorld * a_World, cPlayer * a_Player,
		int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace,
		int a_CursorX, int a_CursorY, int a_CursorZ,
		BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
		) override
	{
		a_BlockType = m_BlockType;
		a_BlockMeta = BlockFaceToMetaData(a_BlockFace);

		if (a_CursorY > 7)
		{
			a_BlockMeta |= 0x8;
		}
		return true;
	}
	
	inline static NIBBLETYPE BlockFaceToMetaData(char a_BlockFace)
	{
		switch (a_BlockFace)
		{
			case BLOCK_FACE_ZP: return 0x1;
			case BLOCK_FACE_ZM: return 0x0;
			case BLOCK_FACE_XP: return 0x3;
			case BLOCK_FACE_XM: return 0x2;
			default:
			{
				ASSERT(!"Unhandled block face!");
				return 0x0;
			}
		}
	}

	inline static NIBBLETYPE BlockMetaDataToBlockFace(NIBBLETYPE a_Meta)
	{
		switch (a_Meta & 0x3)
		{
			case 0x0: return BLOCK_FACE_ZM;
			case 0x1: return BLOCK_FACE_ZP;
			case 0x2: return BLOCK_FACE_XM;
			case 0x3: return BLOCK_FACE_XP;
			default:
			{
				ASSERT(!"Unhandled block meta!");
				return BLOCK_FACE_NONE;
			}
		}
	}

	virtual bool CanBeAt(int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
	{
		NIBBLETYPE Meta;
		a_Chunk.UnboundedRelGetBlockMeta(a_RelX, a_RelY, a_RelZ, Meta);

		AddFaceDirection(a_RelX, a_RelY, a_RelZ, BlockMetaDataToBlockFace(Meta), true);
		BLOCKTYPE BlockIsOn; a_Chunk.UnboundedRelGetBlockType(a_RelX, a_RelY, a_RelZ, BlockIsOn);

		return (a_RelY > 0) && (g_BlockIsSolid[BlockIsOn]);
	}
};