Function GetSmallAppleTreeImage

src/Generating/Trees.cpp:285–332

void GetSmallAppleTreeImage(int a_BlockX, int a_BlockY, int a_BlockZ, cNoise & a_Noise, int a_Seq, sSetBlockVector & a_LogBlocks, sSetBlockVector & a_OtherBlocks)
{
	/* Small apple tree has:
	- a top plus (no log)
	- optional BigO1 + random corners (log)
	- 2 layers of BigO2 + random corners (log)
	- 1 to 3 blocks of trunk
	*/
	
	int Random = a_Noise.IntNoise3DInt(a_BlockX + 64 * a_Seq, a_BlockY, a_BlockZ) >> 3;
	
	int Heights[] = {1, 2, 2, 3} ;
	int Height = 1 + Heights[Random & 3];
	Random >>= 2;
	
	// Pre-alloc so that we don't realloc too often later:
	a_LogBlocks.reserve(Height + 5);
	a_OtherBlocks.reserve(ARRAYCOUNT(BigO2) * 2 + ARRAYCOUNT(BigO1) + ARRAYCOUNT(Corners) * 3 + 3 + 5);
	
	// Trunk:
	for (int i = 0; i < Height; i++)
	{
		a_LogBlocks.push_back(sSetBlock(a_BlockX, a_BlockY + i, a_BlockZ, E_BLOCK_LOG, E_META_LOG_APPLE));
	}
	int Hei = a_BlockY + Height;
	
	// 2 BigO2 + corners layers:
	for (int i = 0; i < 2; i++)
	{
		PushCoordBlocks (a_BlockX, Hei, a_BlockZ, a_OtherBlocks, BigO2, ARRAYCOUNT(BigO2), E_BLOCK_LEAVES, E_META_LEAVES_APPLE);
		PushCornerBlocks(a_BlockX, Hei, a_BlockZ, a_Seq, a_Noise, 0x5000000 - i * 0x10000000, a_OtherBlocks, 2, E_BLOCK_LEAVES, E_META_LEAVES_APPLE);
		a_LogBlocks.push_back(sSetBlock(a_BlockX, Hei, a_BlockZ, E_BLOCK_LOG, E_META_LOG_APPLE));
		Hei++;
	}  // for i - 2*
	
	// Optional BigO1 + corners layer:
	if ((Random & 1) == 0)
	{
		PushCoordBlocks (a_BlockX, Hei, a_BlockZ, a_OtherBlocks, BigO1, ARRAYCOUNT(BigO1), E_BLOCK_LEAVES, E_META_LEAVES_APPLE);
		PushCornerBlocks(a_BlockX, Hei, a_BlockZ, a_Seq, a_Noise, 0x6000000, a_OtherBlocks, 1, E_BLOCK_LEAVES, E_META_LEAVES_APPLE);
		a_LogBlocks.push_back(sSetBlock(a_BlockX, Hei, a_BlockZ, E_BLOCK_LOG, E_META_LOG_APPLE));
		Hei++;
	}
	
	// Top plus:
	PushCoordBlocks(a_BlockX, Hei, a_BlockZ, a_OtherBlocks, BigO1, ARRAYCOUNT(BigO1), E_BLOCK_LEAVES, E_META_LEAVES_APPLE);
	a_OtherBlocks.push_back(sSetBlock(a_BlockX, Hei, a_BlockZ, E_BLOCK_LEAVES, E_META_LEAVES_APPLE));
}