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#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)
{
return;
}
// Grass becomes dirt if there is something on top of it:
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);
return;
}
// Grass spreads to adjacent blocks:
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
}
};
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