def populate(self, chunk, seed):
"""
Place saplings.
The algorithm used to pick locations for the saplings is quite
simple, although slightly involved. The basic technique is to
calculate a Morton number for every xz-column in the chunk, and then
use coprime offsets to sprinkle selected points fairly evenly
throughout the chunk.
Saplings are only placed on dirt and grass blocks.
"""
R.seed(seed)
factors = R.choice(list(combinations(self.primes, 3)))
for x, z in product(xrange(16), repeat=2):
# Make a Morton number.
morton = morton2(chunk.x * 16 + x, chunk.z * 16 + z)
if not all(morton % factor for factor in factors):
# Plant a sapling.
y = chunk.height_at(x, z)
if chunk.get_block((x, y, z)) in self.ground:
chunk.set_block((x, y + 1, z), blocks["sapling"].slot)
def populate(self, chunk, seed):
"""
Place saplings.
The algorithm used to pick locations for the saplings is quite
simple, although slightly involved. The basic technique is to
calculate a Morton number for every xz-column in the chunk, and then
use coprime offsets to sprinkle selected points fairly evenly
throughout the chunk.
Saplings are only placed on dirt and grass blocks.
"""
R.seed(seed)
factors = R.choice(list(combinations(self.primes, 3)))
for x, z in XZ:
# Make a Morton number.
morton = morton2(chunk.x * 16 + x, chunk.z * 16 + z)
if not all(morton % factor for factor in factors):
# Magic number is how many tree types are available
species = morton % 4
# Plant a sapling.
y = chunk.height_at(x, z)
if chunk.get_block((x, y, z)) in self.ground:
chunk.set_block((x, y + 1, z), blocks["sapling"].slot)
chunk.set_metadata((x, y + 1, z), species)
def test_second_full(self):
self.assertEqual(morton2(0x0, 0xffff), 0xaaaaaaaa)
def test_first_full(self):
self.assertEqual(morton2(0xffff, 0x0), 0x55555555)
def test_second(self):
self.assertEqual(morton2(0, 1), 2)
def test_first(self):
self.assertEqual(morton2(1, 0), 1)
def test_zero(self):
self.assertEqual(morton2(0, 0), 0)
def test_first(self):
self.assertEqual(morton2(1, 0), 1)
def test_zero(self):
self.assertEqual(morton2(0, 0), 0)
def test_second_full(self):
self.assertEqual(morton2(0x0, 0xffff), 0xaaaaaaaa)
def test_first_full(self):
self.assertEqual(morton2(0xffff, 0x0), 0x55555555)
def test_second(self):
self.assertEqual(morton2(0, 1), 2)
