def generate_simplex_noise_terrain(nodes, random_seed=117, altitude_feature=["terrain", "altitude"]):
"""
Set altitude feature using simplex noise.
Want to set feature value on all nodes (no criteria), with the value determined by
simplex noise. Noise object is set up in a closure getter function, with the inner function
accepting a node and feature_keys list. The node's own data is then used to determine the
noise value, by querying SimplexNoise object then calling node.set_feature(...)
random.seed(seed)
"""
random.seed(random_seed)
weight = 1
nodetools.set_all_nodes_feature_with_funcs(nodes=nodes,
feature=altitude_feature,
valuators=[(nodeval.get_simplex_noise_valuator(random_seed), weight)],
criteria_funcs=[])
def refine_coastlines(seed, world):
# Want to find all coastal nodes with an altitude between -0.01 and 0.01, and use
# the latitude and longtiude of these points as locations to refine. This increases coastal
# smoothness. Warning! Reset random.seed before both altitude generation routines, or
# the extra cells we just generated will no longer be on the coast.
coastal_test = nodetools.get_criteria_func([
(["terrain", "altitude"], operator.lt, 0.02),
(["terrain", "altitude"], operator.gt, -0.02),
])
locations_to_refine = map(lambda n: (n.latitude, n.longitude),
filter(coastal_test, world.all_boundary_nodes)
)
print("Coastal locations to refine: %d" % len(locations_to_refine))
world.refine_voronoi_nodes_around_locations(locations_to_refine)
random.seed(seed)
weight = 1
nodetools.set_all_nodes_feature_with_funcs(nodes=world.all_boundary_nodes,
feature=["terrain", "altitude"],
valuators=[(nodeval.get_simplex_noise_valuator(seed), weight)],
criteria_funcs=[])
