Method DoExplosionAt

src/ChunkMap.cpp:1737–1948

void cChunkMap::DoExplosionAt(double a_ExplosionSize, double a_BlockX, double a_BlockY, double a_BlockZ, cVector3iArray & a_BlocksAffected)
{
	// Don't explode if outside of Y range (prevents the following test running into unallocated memory):
	if ((a_BlockY < 0) || (a_BlockY > cChunkDef::Height - 1))
	{
		return;
	}

	bool ShouldDestroyBlocks = true;

	// Don't explode if the explosion center is inside a liquid block:
	if (IsBlockLiquid(m_World->GetBlock((int)floor(a_BlockX), (int)floor(a_BlockY), (int)floor(a_BlockZ))))
	{
		ShouldDestroyBlocks = false;
	}

	int ExplosionSizeInt = (int)ceil(a_ExplosionSize);
	int ExplosionSizeSq = ExplosionSizeInt * ExplosionSizeInt;

	int bx = (int)floor(a_BlockX);
	int by = (int)floor(a_BlockY);
	int bz = (int)floor(a_BlockZ);

	int MinY = std::max((int)floor(a_BlockY - ExplosionSizeInt), 0);
	int MaxY = std::min((int)ceil(a_BlockY + ExplosionSizeInt), cChunkDef::Height - 1);

	if (ShouldDestroyBlocks)
	{
		cBlockArea area;

		a_BlocksAffected.reserve(8 * ExplosionSizeInt * ExplosionSizeInt * ExplosionSizeInt);

		area.Read(m_World, bx - ExplosionSizeInt, (int)ceil(a_BlockX + ExplosionSizeInt), MinY, MaxY, bz - ExplosionSizeInt, (int)ceil(a_BlockZ + ExplosionSizeInt));
		for (int x = -ExplosionSizeInt; x < ExplosionSizeInt; x++)
		{
			for (int y = -ExplosionSizeInt; y < ExplosionSizeInt; y++)
			{
				if ((by + y >= cChunkDef::Height) || (by + y < 0))
				{
					// Outside of the world
					continue;
				}
				for (int z = -ExplosionSizeInt; z < ExplosionSizeInt; z++)
				{
					if ((x * x + y * y + z * z) > ExplosionSizeSq)
					{
						// Too far away
						continue;
					}

					BLOCKTYPE Block = area.GetBlockType(bx + x, by + y, bz + z);
					switch (Block)
					{
						case E_BLOCK_TNT:
						{
							// Activate the TNT, with a random fuse between 10 to 30 game ticks
							int FuseTime = 10 + m_World->GetTickRandomNumber(20);
							m_World->SpawnPrimedTNT(a_BlockX + x + 0.5, a_BlockY + y + 0.5, a_BlockZ + z + 0.5, FuseTime);