cuberite-2a/src/Blocks/BlockComparator.h

#pragma once

#include "BlockHandler.h"
#include "BlockRedstoneRepeater.h"
#include "MetaRotator.h"





class cBlockComparatorHandler :
	public cMetaRotator<cBlockHandler, 0x03, 0x00, 0x01, 0x02, 0x03, true>
{
public:
	cBlockComparatorHandler(BLOCKTYPE a_BlockType)
		: cMetaRotator<cBlockHandler, 0x03, 0x00, 0x01, 0x02, 0x03, true>(a_BlockType)
	{
	}
	
	virtual bool OnUse(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, cPlayer * a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ) override
	{
		NIBBLETYPE Meta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
		Meta ^= 0x04;  // Toggle 3rd (addition / subtraction) bit with XOR
		a_ChunkInterface.SetBlockMeta(a_BlockX, a_BlockY, a_BlockZ, Meta);
		return true;
	}

	virtual void OnCancelRightClick(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, cPlayer * a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace) override
	{
		UNUSED(a_ChunkInterface);
		a_WorldInterface.SendBlockTo(a_BlockX, a_BlockY, a_BlockZ, a_Player);
	}

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

	virtual bool IsUseable(void) override
	{
		return true;
	}
	
	virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
	{
		return ((a_RelY > 0) && (a_Chunk.GetBlock(a_RelX, a_RelY - 1, a_RelZ) != E_BLOCK_AIR));
	}

	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;
		a_BlockMeta = cBlockRedstoneRepeaterHandler::RepeaterRotationToMetaData(a_Player->GetYaw());
		return true;
	}

	inline static Vector3i GetSideCoordinate(const Vector3i & a_Position, NIBBLETYPE a_Meta, bool a_bInverse)
	{
		auto Position = a_Position;
		if (!a_bInverse)
		{
			switch (a_Meta)
			{
				case 0x0: Position.x++; break;
				case 0x1: Position.z--; break;
				case 0x2: Position.x--; break;
				case 0x3: Position.z++; break;
				default:
				{
					LOGWARNING("%s: Unknown metadata: %d", __FUNCTION__, a_Meta);
					ASSERT(!"Unknown metadata while determining orientation of comparator!");
					break;
				}
			}
		}
		else
		{
			switch (a_Meta)
			{
				case 0x0: Position.x--; break;
				case 0x1: Position.z++; break;
				case 0x2: Position.x++; break;
				case 0x3: Position.z--; break;
				default:
				{
					LOGWARNING("%s: Unknown metadata: %d", __FUNCTION__, a_Meta);
					ASSERT(!"Unknown metadata while determining orientation of comparator!");
					break;
				}
			}
		}

		return Position;
	}

	inline static Vector3i GetRearCoordinate(const Vector3i & a_Position, NIBBLETYPE a_Meta)
	{
		auto Position = a_Position;
		switch (a_Meta)
		{
			case 0x0: Position.z++; break;
			case 0x1: Position.x--; break;
			case 0x2: Position.z--; break;
			case 0x3: Position.x++; break;
			default:
			{
				LOGWARNING("%s: Unknown metadata: %d", __FUNCTION__, a_Meta);
				ASSERT(!"Unknown metadata while determining orientation of comparator!");
				break;
			}
		}

		return Position;
	}

	inline static Vector3i GetFrontCoordinate(const Vector3i & a_Position, NIBBLETYPE a_Meta)
	{
		auto Position = a_Position;
		switch (a_Meta)
		{
			case 0x0: Position.z--; break;
			case 0x1: Position.x++; break;
			case 0x2: Position.z++; break;
			case 0x3: Position.x--; break;
			default:
			{
				LOGWARNING("%s: Unknown metadata: %d", __FUNCTION__, a_Meta);
				ASSERT(!"Unknown metadata while determining orientation of comparator!");
				break;
			}
		}

		return Position;
	}

	virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) override
	{
		UNUSED(a_Meta);
		return 11;
	}
} ;