def __call__(self, truss_1, truss_2):
"""Calls a crossover object on two trusses to combine them.
Crossover object must have been instantiated specifying which
methods to use.
Args:
truss_1 (Truss object): First truss to be combined.
truss_2 (Truss object): Second truss to be combined.
Returns:
child_1, child_2 (Truss objects): Children trusses produced by crossover.
"""
user_spec_nodes = self.params['user_spec_nodes']
child_1 = Truss(user_spec_nodes, 0, 0, 0)
child_2 = Truss(user_spec_nodes, 0, 0, 0)
child_1.rand_nodes, child_2.rand_nodes = self.node_method(
truss_1.rand_nodes, truss_2.rand_nodes,
**self.params['node_crossover_params'])
child_1.edges, child_2.edges = self.edge_method(
truss_1.edges, truss_2.edges,
**self.params['edge_crossover_params'])
child_1.properties, child_2.properties = self.property_method(
truss_1.properties, truss_2.properties,
**self.params['property_crossover_params'])
return child_1, child_2
def __call__(self, truss):
"""Calls a mutator object on a truss to change it.
Mutator object must have been instantiated specifying which
methods to use.
Args:
truss (Truss object): Truss to be mutated.
Returns:
child (Truss object): Child truss produced by mutation.
"""
user_spec_nodes = self.params['user_spec_nodes']
child = Truss(user_spec_nodes, 0, 0, 0)
child.rand_nodes = self.node_method(
truss.rand_nodes, **self.params['node_mutator_params'])
child.edges = self.edge_method(truss.edges,
**self.params['edge_mutator_params'])
child.properties = self.property_method(
truss.properties, **self.params['property_mutator_params'])
return child