def mutate(self, genome):
if random.random() < genome.mute_rates["gene_action"]:
# Mutate this gene's action
self.action = mutated_intenum(self.action, goomba.Action, 1.0,
genome.mute_rates["enum_rel"])
elif random.random() < genome.mute_rates["struct_mod"]:
# Structure-modifying function mutations.
# Select a random node and mutation
node = random.choice(self.function.as_list())
mute = weighted_choice(genome.mute_rates["struct_rel"])
if mute == StructMutes.SubTree:
new_node = FTreeNode.random(round(genome.fun_gen_depth),
len(genome), genome.const_bounds,
genome.mute_rates["leaf_rel"],
node.parent)
if node.parent is None:
self.function = new_node
elif node.parent.left == node:
node.parent.left = new_node
else:
node.parent.right = new_node
elif mute == StructMutes.OpAbove:
new_node = FTreeNode(random.choice(list(Op)), None, None,
node.parent)
if node.parent is None:
self.function = new_node
elif node.parent.left == node:
node.parent.left = new_node
else:
node.parent.right = new_node
new_child = FTreeNode.random(round(genome.fun_gen_depth),
len(genome), genome.const_bounds,
genome.mute_rates["leaf_rel"],
new_node)
if random.random() < 0.5:
new_node.left = node
new_node.right = new_child
else:
new_node.left = new_child
new_node.right = node
elif mute == StructMutes.Swap:
if isinstance(node, FTreeLeaf):
if node.parent is not None:
node = node.parent
else:
return
# swap operands
tmp = node.left
node.left = node.right
node.right = tmp
else:
# Non-strucure-modifying function mutation
# Select a random node
node = random.choice(self.function.as_list())
if isinstance(node, FTreeNode):
# mutate operator
node.operator = mutated_intenum(node.operator, Op, 1.0,
genome.mute_rates["enum_rel"])
else:
if random.random() < genome.mute_rates["leaf_type"]:
# mutate the leaf type
new_type = node.ref_type
# Keep trying to mutate until the value actually changes
while new_type == node.ref_type:
new_type = mutated_intenum(
node.ref_type, RefType, 1.0,
genome.mute_rates["leaf_rel"])
if node.ref_type == RefType.Constant:
node.val = round(
node.val) # In case mutating from float to int
node.ref_type = new_type
else:
# mutate the leaf value
if node.ref_type == RefType.Constant:
node.val = mutated_num(node.val, 1.0, genome,
[None, None])
elif node.ref_type in [
RefType.Pure_Offset_Call,
RefType.Impure_Offset_Call
]:
node.val = mutated_int_in_range(
node.val, 1.0,
[-len(genome), len(genome)],
genome.mute_rates["enum_rel"])
elif node.ref_type == RefType.Poll_Sensor:
node.val = mutated_int_in_range(
node.val, 1.0, [0, len(goomba.Sensor) - 1],
genome.mute_rates["enum_rel"])
def mutate(self, genome):
if random.random() < genome.mute_rates["gene_action"]:
# Mutate this gene's action
self.action = mutated_intenum(self.action, goomba.Action,
1.0, genome.mute_rates["enum_rel"])
elif random.random() < genome.mute_rates["struct_mod"]:
# Structure-modifying function mutations.
# Select a random node and mutation
node = random.choice(self.function.as_list())
mute = weighted_choice(genome.mute_rates["struct_rel"])
if mute == StructMutes.SubTree:
new_node = FTreeNode.random(round(genome.fun_gen_depth),
len(genome),
genome.const_bounds,
genome.mute_rates["leaf_rel"],
node.parent)
if node.parent is None:
self.function = new_node
elif node.parent.left == node:
node.parent.left = new_node
else:
node.parent.right = new_node
elif mute == StructMutes.OpAbove:
new_node = FTreeNode(random.choice(list(Op)), None, None, node.parent)
if node.parent is None:
self.function = new_node
elif node.parent.left == node:
node.parent.left = new_node
else:
node.parent.right = new_node
new_child = FTreeNode.random(round(genome.fun_gen_depth),
len(genome),
genome.const_bounds,
genome.mute_rates["leaf_rel"],
new_node)
if random.random() < 0.5:
new_node.left = node
new_node.right = new_child
else:
new_node.left = new_child
new_node.right = node
elif mute == StructMutes.Swap:
if isinstance(node, FTreeLeaf):
if node.parent is not None:
node = node.parent
else:
return
# swap operands
tmp = node.left
node.left = node.right
node.right = tmp
else:
# Non-strucure-modifying function mutation
# Select a random node
node = random.choice(self.function.as_list())
if isinstance(node, FTreeNode):
# mutate operator
node.operator = mutated_intenum(node.operator, Op,
1.0, genome.mute_rates["enum_rel"])
else:
if random.random() < genome.mute_rates["leaf_type"]:
# mutate the leaf type
new_type = node.ref_type
# Keep trying to mutate until the value actually changes
while new_type == node.ref_type:
new_type = mutated_intenum(node.ref_type, RefType,
1.0, genome.mute_rates["leaf_rel"])
if node.ref_type == RefType.Constant:
node.val = round(node.val) # In case mutating from float to int
node.ref_type = new_type
else:
# mutate the leaf value
if node.ref_type == RefType.Constant:
node.val = mutated_num(node.val, 1.0,
genome, [None, None])
elif node.ref_type in [RefType.Pure_Offset_Call, RefType.Impure_Offset_Call]:
node.val = mutated_int_in_range(node.val, 1.0,
[-len(genome), len(genome)],
genome.mute_rates["enum_rel"])
elif node.ref_type == RefType.Poll_Sensor:
node.val = mutated_int_in_range(node.val, 1.0,
[0, len(goomba.Sensor) - 1],
genome.mute_rates["enum_rel"])
def random(cls, max_depth, gen_len, const_bounds, leaf_weights):
action = random.choice(list(goomba.Action))
function = FTreeNode.random(max_depth, gen_len, const_bounds,
leaf_weights)
return cls(action, function)
def random(cls, max_depth, gen_len, const_bounds, leaf_weights):
action = random.choice(list(goomba.Action))
function = FTreeNode.random(max_depth, gen_len, const_bounds, leaf_weights)
return cls(action, function)
