cuberite-2a/source/blocks/BlockSapling.h

#pragma once
#include "Block.h"
#include "../cWorld.h"

class cBlockSaplingHandler : public cBlockHandler
{
public:
	cBlockSaplingHandler(BLOCKTYPE a_BlockID)
		: cBlockHandler(a_BlockID)
	{
	}

	virtual bool NeedsRandomTicks() override
	{
		return true;
	}

	virtual NIBBLETYPE GetDropMeta(NIBBLETYPE a_BlockMeta) override
	{
		return a_BlockMeta & 3;	//Only the first 2 bits contain the display information the others are for growing
	}

	virtual bool CanBeAt(cWorld *a_World, int a_X, int a_Y, int a_Z) override
	{
		return IsBlockTypeOfDirt(a_World->GetBlock(a_X, a_Y - 1, a_Z));
	}

	virtual bool AllowBlockOnTop() override
	{
		return false;
	}

	void OnUpdate(cWorld *a_World, int a_X, int a_Y, int a_Z) override
	{
		NIBBLETYPE Meta = a_World->GetBlockMeta(a_X, a_Y, a_Z);
		
		if ((Meta & 0x08) != 0)
		{
			a_World->GrowTree(a_X, a_Y, a_Z);
		}
		else
		{
			a_World->SetBlockMeta(a_X, a_Y, a_Z, Meta | 0x08);
		}
	}
	
	virtual bool CanBePlacedOnSide() override
	{
		return false;
	}
};