path: root/source/blocks/BlockDirt.h

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

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

	
	virtual bool NeedsRandomTicks() override
	{
		return m_BlockID == E_BLOCK_GRASS;
	}

	virtual int GetDropID() override
	{
		return E_BLOCK_DIRT;
	}
	
	
	void OnUpdate(cWorld *a_World, int a_X, int a_Y, int a_Z) override
	{
		if(m_BlockID == E_BLOCK_GRASS)
		{
			//Grass becomes dirt if there is something on top of them
			BLOCKTYPE Above = a_World->GetBlock(a_X, a_Y + 1, a_Z);
			if(!g_BlockTransparent[Above] && !g_BlockOneHitDig[Above])
			{
				a_World->FastSetBlock(a_X, a_Y, a_Z, E_BLOCK_DIRT, 0);
			}

			
			MTRand rand;
			for (int i = 0; i < 2; i++)  // Pick two blocks to grow to
			{
				int OfsX = rand.randInt(2) - 1;  // [-1 .. 1]
				int OfsY = rand.randInt(4) - 3;  // [-3 .. 1]
				int OfsZ = rand.randInt(2) - 1;  // [-1 .. 1]
		
				BLOCKTYPE  DestBlock;
				NIBBLETYPE DestMeta;
				a_World->GetBlockTypeMeta(a_X + OfsX, a_Y + OfsY, a_Z + OfsZ, DestBlock, DestMeta);
				if(DestBlock != E_BLOCK_DIRT)
				{
					continue;
				}

				BLOCKTYPE AboveDest;
				NIBBLETYPE AboveMeta;
				a_World->GetBlockTypeMeta(a_X + OfsX, a_Y + OfsY + 1, a_Z + OfsZ, AboveDest, AboveMeta);
				if (g_BlockOneHitDig[AboveDest] || g_BlockTransparent[AboveDest])
				{
					a_World->FastSetBlock(a_X + OfsX, a_Y + OfsY, a_Z + OfsZ, E_BLOCK_GRASS, 0);
				}
			}  // for i - repeat twice

		}
	}
	
};