def empty_individual(cls):
"""
# Top-down construction of behavior tree
root = Selector(name='High Level Ordering of Strategies')
offensive_plan = Sequence(name='Offensive Strategy')
largest_fleet_check = Check(have_largest_fleet)
attack = Action(attack_weakest_enemy_planet)
offensive_plan.child_nodes = [largest_fleet_check, attack]
for node in offensive_plan.child_nodes:
node.parent_node = offensive_plan
spread_sequence = Sequence(name='Spread Strategy')
neutral_planet_check = Check(if_neutral_planet_available)
spread_action = Action(spread_to_weakest_neutral_planet)
spread_sequence.child_nodes = [neutral_planet_check, spread_action]
for node in spread_sequence.child_nodes:
node.parent_node = spread_sequence
root.child_nodes = [offensive_plan, spread_sequence, attack.copy()]
for node in root.child_nodes:
node.parent_node = root
root.parent_node = None
"""
root = Selector(name='High Level Ordering of Strategies')
root.child_nodes = []
#print("Starting with: " + root.tree_to_string())
#input()
root.parent_node = None
return cls(root)
def parse_tree(tree_string):
root = Selector(name="Root")
#Current node has the current selector or sequence that we are processing
current_node = root
for char in tree_string:
if char == "-":
#Selector
new_node = Selector(name="Selector")
new_node.parent_node = current_node
new_node.child_nodes = []
current_node.child_nodes.append(new_node)
elif char == "_":
#Sequence
new_node = Sequence(name="Sequence")
new_node.parent_node = current_node
new_node.child_nodes = []
current_node.child_nodes.append(new_node)
elif char == "[":
#Start children
current_node = current_node.child_nodes[-1]
elif char == "]":
#End children
current_node = current_node.parent_node
elif char.isupper():
#Check
new_node = Check(node_dict[char])
new_node.parent_node = current_node
current_node.child_nodes.append(new_node)
elif char.islower():
#Action
new_node = Action(node_dict[char])
new_node.parent_node = current_node
current_node.child_nodes.append(new_node)
logging.info('\n Decoded tree as: ' + root.tree_to_string())
return root
def generate_tree(root):
num_children = random.randint(2, 5)
while True:
is_composite = random.randint(0, 100) < 10
if is_composite:
new_class = ["-", Selector] if random.randint(
0, 2) == 0 else ["_", Sequence]
else:
new_class = random.choice(list(node_dict.items()))
if new_class[1] == Selector:
new_node = Selector(name="Selector")
new_node.child_nodes = []
new_root = generate_tree(new_node)
new_root.parent_node = root
root.child_nodes.append(new_root)
elif new_class[1] == Sequence:
new_node = Sequence(name="Sequence")
new_node.child_nodes = []
new_root = generate_tree(new_node)
new_root.parent_node = root
root.child_nodes.append(new_root)
elif new_class[0].isupper():
new_node = Check(new_class[1])
new_node.parent_node = root
root.child_nodes.append(new_node)
elif new_class[0].islower():
new_node = Action(new_class[1])
new_node.parent_node = root
root.child_nodes.append(new_node)
if num_children > 0:
num_children -= 1
if num_children <= 0:
break
return root
def parse_tree(tree_string):
root = Selector(name="Root")
#Current node has the current selector or sequence that we are processing
current_node = root
for char in tree_string[1,-1]:
if char == "-":
#Selector
new_node = Selector(name="Selector")
new_node.parent = current_node
current_node.child_nodes.append(new_node)
elif char == "_":
#Sequence
new_node = Selector(name="Sequence")
new_node.parent = current_node
current_node.child_nodes.append(new_node)
elif char == "[":
#Start children
current_node = current_node.child_nodes[-1]
elif char == "]":
#End children
current_node = current_node.parent_node
elif char.isupper():
#Check
new_node = Check(node_dict(char))
new_node.parent_node = current_node
current_node.child_nodes.append(new_node)
elif char.islower():
#Action
new_node = Action(node_dict(char))
new_node.parent_node = current_node
current_node.child_nodes.append(new_node)
return root
def random_individual(cls):
root = Selector([], name='High Level Ordering of Strategies')
root.parent_node = None
#print("Starting with: " + root.tree_to_string())
g = generate_tree(root)
#print("test")
#print("Generated random treE: " + g.tree_to_string())
#input()
#print("Created: " + g.tree_to_string())
return cls(g)
