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

#pragma once

#include "BlockHandler.h"





class cBlockPortalHandler:
	public cBlockHandler
{
	using Super = cBlockHandler;

public:

	using Super::Super;

private:

	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
	{
		// We set meta to zero so Cuberite doesn't stop a Creative-mode player from building custom portal shapes
		// CanBeAt doesn't do anything if meta is zero
		// We set to zero because the client sends meta = 1 or 2 to the server (it calculates rotation itself)

		a_BlockType = m_BlockType;
		a_BlockMeta = 0;
		return true;
	}





	virtual cItems ConvertToPickups(NIBBLETYPE a_BlockMeta, cBlockEntity * a_BlockEntity, const cEntity * a_Digger, const cItem * a_Tool) const override
	{
		// No pickups
		return {};
	}





	virtual void OnUpdate(
		cChunkInterface & a_ChunkInterface,
		cWorldInterface & a_WorldInterface,
		cBlockPluginInterface & a_PluginInterface,
		cChunk & a_Chunk,
		const Vector3i a_RelPos
	) const override
	{
		// Spawn zombie pigmen with a 0.05% chance:
		if (GetRandomProvider().RandBool(0.9995))
		{
			return;
		}
		auto WorldPos = a_Chunk.RelativeToAbsolute(a_RelPos);
		a_WorldInterface.SpawnMob(WorldPos.x, WorldPos.y, WorldPos.z, mtZombiePigman, false);
	}





	virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, const Vector3i a_RelPos, const cChunk & a_Chunk) const override
	{
		if ((a_RelPos.y <= 0) || (a_RelPos.y >= cChunkDef::Height - 1))
		{
			return false;  // In case someone places a portal with meta 1 or 2 at boundaries, and server tries to get invalid coords at Y - 1 or Y + 1
		}

		switch (a_Chunk.GetMeta(a_RelPos))
		{
			case 0x1:
			{
				static const std::array<Vector3i, 4> PortalCheck
				{
					{
						{ 0, 1, 0 },
						{ 0, -1, 0 },
						{ 1, 0, 0 },
						{ -1, 0, 0 },
					}
				};

				for (const auto & Direction : PortalCheck)
				{
					BLOCKTYPE Block;
					a_Chunk.UnboundedRelGetBlockType(a_RelPos + Direction, Block);
					if ((Block != E_BLOCK_NETHER_PORTAL) && (Block != E_BLOCK_OBSIDIAN))
					{
						return false;
					}
				}
				break;
			}
			case 0x2:
			{
				static const std::array<Vector3i, 4> PortalCheck
				{
					{
						{ 0, 1, 0 },
						{ 0, -1, 0 },
						{ 0, 0, -1 },
						{ 0, 0, 1 },
					}
				};

				for (const auto & Direction : PortalCheck)
				{
					BLOCKTYPE Block;
					a_Chunk.UnboundedRelGetBlockType(a_RelPos + Direction, Block);
					if ((Block != E_BLOCK_NETHER_PORTAL) && (Block != E_BLOCK_OBSIDIAN))
					{
						return false;
					}
				}
				break;
			}
		}
		return true;
	}





	virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) const override
	{
		UNUSED(a_Meta);
		return 24;
	}
} ;