def squeeze_cluster(self, cluster_cells, cluster_id, max_moves=15):
bboard = np.zeros((60, 60), dtype=np.bool)
for cluster_id1 in cluster_cells:
for x, y in cluster_cells[cluster_id1]:
if bboard[y][x]:
raise Exception("overlap")
bboard[y][x] = True
ext_set = self.__get_exterior_set(cluster_id,
cluster_cells,
bboard,
max_dist=1,
search_all=True)
ext_set = list(ext_set)
ext_set.sort(
key=lambda pos: manhattan_distance(pos, self.center_of_board))
own_cells = list(cluster_cells[cluster_id])
own_cells.sort(
key=lambda pos: manhattan_distance(pos, self.center_of_board),
reverse=True)
num_moves = 0
while len(ext_set) > 0 and len(own_cells) > 0:
if num_moves > max_moves:
break
num_moves += 1
new_cell = ext_set.pop(0)
assert (not bboard[new_cell[1]][new_cell[0]])
old_cell = own_cells.pop(0)
if manhattan_distance(new_cell, self.center_of_board) > \
manhattan_distance(old_cell, self.center_of_board):
# no need to proceed
break
cluster_cells[cluster_id].remove(old_cell)
cluster_cells[cluster_id].add(new_cell)
return num_moves
def evaluation_function(self, current_game_state, action):
"""
Design a better evaluation function here.
The evaluation function takes in the current and proposed successor
GameStates (pacman.py) and returns a number, where higher numbers are better.
The code below extracts some useful information from the state, like the
remaining food (new_food) and Pacman position after moving (new_pos).
new_scared_times holds the number of moves that each ghost will remain
scared because of Pacman having eaten a power pellet.
Print out these variables to see what you're getting, then combine them
to create a masterful evaluation function.
"""
# Useful information you can extract from a GameState (pacman.py)
successor_game_state = current_game_state.generate_pacman_successor(
action)
new_pos = successor_game_state.get_pacman_position()
new_food = successor_game_state.get_food()
"*** YOUR CODE HERE ***"
"""
Variable Definitions for the current food, an alternate score,
distance to food and ghost and the number of food in the successor state
"""
current_food = current_game_state.get_food()
alternate_score = 0
food_distance = 99999
ghost_distance = 99999
food_successor = len(new_food.as_list())
"""
Finding the closest food and ghost value
"""
for food in new_food.as_list():
distance = manhattan_distance(food, new_pos)
food_distance = min([food_distance, distance])
for ghost in successor_game_state.get_ghost_positions():
distance = manhattan_distance(new_pos, ghost)
ghost_distance = min([ghost_distance, distance])
"""
If food is in the current position then add to alternative score
"""
pos_x, pos_y = new_pos
if current_food[pos_x][pos_y]:
alternate_score += 10
"""
Score is calculated as reciprocal of the distance to closest food minus number of food plus aternate score
"""
score = 1.0 / food_distance - food_successor + alternate_score
"""
If a ghost is within 2 spaces then subtract 600 from score, should negate any positive score when ghost is near essentially
"""
if ghost_distance < 2:
score -= 600
return score
def evaluation_function(self, current_game_state, action):
"""Return evaluation (number) based on game state and proposed action.
*** Design a better evaluation function here. ***
The evaluation function takes in the current and proposed successor
GameStates (pacman.py) and returns a number, where higher numbers are
better.
The code samples below extracts some useful information from the state,
like the remaining food (new_food) and Pacman position after moving
(new_pos). new_scared_times holds the number of moves that each ghost
will remain scared because of Pacman having eaten a power pellet.
Print out these variables to see what you're getting, then combine them
to create a masterful evaluation function.
"""
# Useful information you can extract from a GameState (pacman.py)
successor_game_state =\
current_game_state.generate_pacman_successor(action)
new_pos = successor_game_state.get_pacman_position()
new_food = successor_game_state.get_food()
new_ghost_states = successor_game_state.get_ghost_states()
"*** YOUR CODE HERE ***"
# Its the goal just do it!!!
if successor_game_state.is_win():
return float('inf')
# Base utility
utility = successor_game_state.get_score()
# Check how close a gost is to you and move accordingly
for ghost_state in new_ghost_states:
if ghost_state.scared_timer == 0:
pos = ghost_state.get_position()
distance_to_ghost = util.manhattan_distance(pos, new_pos)
if distance_to_ghost <= 10:
utility -= 10 - distance_to_ghost
elif distance_to_ghost <= 2:
utility -= 100
# If the next game state has you eating a food try and go there
current_num_food = current_game_state.get_num_food()
next_num_food = successor_game_state.get_num_food()
if current_num_food > next_num_food:
utility += 25
# Try and go closer to nearest food
utility -= min([util.manhattan_distance(new_pos, pos) for pos in
[(i, j) for i, lst in enumerate(new_food)
for j, val in enumerate(lst) if val]])
return utility
def better_evaluation_function(current_game_state):
"""Your awesome evaluation function (question 5).
Description: This function works off the simpler evaluation function above
its primary deference is that it works off of the current game state
and also evaluations power pellets and some small changes to the math
when evaluating ghost and food.
"""
# Set base utility to current score
utility = current_game_state.get_score()
# Return max utility if you will win
if current_game_state.is_win():
return float('inf')
# Get pacmans current position
current_position = current_game_state.get_pacman_position()
# Try and go closer to nearest food
food_dist = [util.manhattan_distance(current_position, pos)
for pos in
[(i, j)
for i, lst in
enumerate(current_game_state.get_food())
for j, val in
enumerate(lst)
if val]]
utility -= min(food_dist) / len(food_dist)
# Get distance to each ghost that is not scared
dist = [util.manhattan_distance(current_position, ghost.get_position())
for ghost in current_game_state.get_ghost_states()
if ghost.scared_timer == 0]
# Try and stay away from all ghosts
for d in dist:
if d < 5:
utility -= (10 - d)
if d <= 1:
utility -= 300
# Try and go closer to power capsules
dist_capsules = [util.manhattan_distance(current_position, capsule)
for capsule in current_game_state.get_capsules()]
for c_dist in dist_capsules:
utility -= c_dist
# Return utility
return utility
def make_observation(self, index):
state = self.deep_copy()
# Adds the sonar signal
pos = state.get_agent_position(index)
n = state.get_num_agents()
distances = [noisy_distance(pos, state.get_agent_position(i)) for i in range(n)]
state.agent_distances = distances
# Remove states of distant opponents
if index in self.blue_team:
team = self.blue_team
other_team = self.red_team
else:
other_team = self.blue_team
team = self.red_team
for enemy in other_team:
seen = False
enemy_pos = state.get_agent_position(enemy)
for teammate in team:
if util.manhattan_distance(enemy_pos, state.get_agent_position(teammate)) <= SIGHT_RANGE:
seen = True
if not seen:
state.data.agent_states[enemy].configuration = None
return state
def enhanced_pacman_features(state, action):
"""
For each state, this function is called with each legal action.
It should return a counter with { <feature name> : <feature value>, ... }
"""
features = util.Counter()
"*** YOUR CODE HERE ***"
successor_game_state = state.generate_pacman_successor(action)
new_pos = successor_game_state.get_pacman_position()
new_food = successor_game_state.get_food()
new_ghost_states = successor_game_state.get_ghost_states()
new_scared_tiems = [
ghost_state.scared_timer for ghost_state in new_ghost_states
]
if 'Stop' in action:
features[action, 'val'] = -0.1
return features
for ghost_state in new_ghost_states:
ghost_pos = ghost_state.get_position()
if ghost_pos == new_pos and ghost_state.scared_timer == 0:
features[action, 'val'] = -100
return features
food_locations = state.get_food().as_list()
for food in food_locations:
dis = [util.manhattan_distance(food, new_pos)]
k = (1.0 / (max(dis) + 0.1))
features[action, 'val'] = k**3
return features
def killed_opponent(self, game_state,index):
for opponent_index in self.opponent_indices:
if self.opponent_positions[opponent_index] == game_state.get_initial_agent_position(opponent_index):
return True
elif not self.opponent_previous_positions[opponent_index] == None:
if self.opponent_positions[opponent_index] == None and util.manhattan_distance(game_state.get_agent_position(index), self.opponent_previous_positions[opponent_index])<2:
return True
return False
def better_evaluation_function(current_game_state):
"""
Your extreme ghost-hunting, pellet-nabbing, food-gobbling, unstoppable
evaluation function (question 5).
DESCRIPTION: The evaluation function considers the current score of a state
and factors in the distance to a ghost, an edible ghost, and the closest food
dot. If and edible ghost is nearby and is scared for long enough to get to, then
going for that ghost is greatly incentivized as it adds alot of points. If
there is any ghost nearby it deincentivizes that state, tempered by the distance
of the ghost. The function also checks the closest food pellet. The closer the
closest food pellet the more incentivization. These incentivizers of ghosts,
edible ghosts and closest food dot are all summed with the score. That value
is then returned.
"""
"*** YOUR CODE HERE ***"
pos = current_game_state.get_pacman_position()
food = current_game_state.get_food()
ghost_states = current_game_state.get_ghost_states()
food_weight = 1.0
ghost_weight = 1.0
edible_ghost_weight = 7.0
# because the score at each state matters
value = current_game_state.get_score()
# distance to ghosts
ghost_value = 0
for ghost in ghost_states:
distance_to_ghost = manhattan_distance(pos, ghost.get_position())
if distance_to_ghost > 0:
if ghost.scared_timer > distance_to_ghost: # if ghost scared and close enough to get
ghost_value += edible_ghost_weight / distance_to_ghost # eat it
else: # else avoid ghost
ghost_value -= ghost_weight / distance_to_ghost
value += ghost_value
# distance to closest food
distances_to_food = [manhattan_distance(pos, x) for x in food.as_list()]
if len(distances_to_food): #if food is found
value += food_weight / min(distances_to_food)
return value
def how_far(directions):
heading = np.array([0, 1])
position = np.array([0, 0])
for (turn, dist) in parse(directions):
if turn == 'L':
heading = rotatePositive90(heading)
elif turn == 'R':
heading = rotateNegative90(heading)
position += heading * dist
return util.manhattan_distance((0, 0), position.tolist())
def manhattan_dist_sum(p, tiles = None):
if not tiles:
tiles = p.flat
solved = puzzle.solved(p)
s = 0
for t in tiles:
s_pos = puzzle.get_position(p, t)
t_pos = puzzle.get_position(solved, t)
s += u.manhattan_distance(*s_pos, *t_pos)
return s
def observe(self, observation, game_state, observer):
"""Update beliefs based on a distance observation and game_state.
The noisy_distance is the estimated Manhattan distance to the
opponent being tracked.
Overrides InferenceModule.observe
"""
if len(
{key: value
for key, value in self.beliefs.items() if value > 0}) == 0:
# THIS SHOULD NOT HAPPEN
print("***************ALERT: ALL ZEROS********************",
self.index)
# but just in case, we will assume it was because opponent was
# eaten and we somehow missed that
self.observe_exact(self.get_initial_position(game_state),
game_state)
return
if len(self.possibly_eaten_by) > 0:
eaten = True
for index, position in self.possibly_eaten_by:
# if in starting position then we were the one eaten,
# unless we were already there (in which case, if we can't see
# the opponent exactly, they were eaten)
if (((game_state.get_agent_position(index)
== game_state.get_initial_agent_position(index))
and (position != game_state.get_agent_position(index)))):
# WE WERE EATEN
eaten = False
break
if eaten:
# THE OPPONENT WE ARE TRACKING WAS EATEN, SO THEY RETURNED
# TO STARTING POSITION
self.observe_exact(self.get_initial_position(game_state),
game_state)
return
# reset this data structure
self.possibly_eaten_by = []
noisy_distance = observation
observer_position = game_state.get_agent_position(observer)
all_possible = util.Counter()
for p in [p for p in self.legal_positions if self.beliefs[p] > 0]:
true_distance = util.manhattan_distance(p, observer_position)
all_possible[p] = game_state.get_distance_prob(
true_distance, noisy_distance) * self.beliefs[p]
all_possible.normalize()
self.beliefs = all_possible
def better_evaluation_function(current_game_state):
"""
Your extreme ghost-hunting, pellet-nabbing, food-gobbling, unstoppable
evaluation function (question 5).
DESCRIPTION:
This evaluation function works by manipulating the values of the
distances to the food pellets and basically evaluates the score
of based on how close pacman is to food pellets and the number of
pellets left.
This evaluation function works for the tests and passes them
but it certainly does not do a good job of evaluating all possible variables
because it does not take into account ghosts and pellets and whether ghosts are
scared and so on. So in other circumstances I do not think this evaluation function
will perform well but it does perform well enough in this small classic test against
one ghost
"""
"*** YOUR CODE HERE ***"
"""
Variable definitions of all valuable pieces of information
Current pacman position and food
List for the distances to food
"""
current_pos = current_game_state.get_pacman_position()
current_food = current_game_state.get_food()
old_score = current_game_state.get_score()
food_distance = []
score = 0
"""
List of all manhattan distances to food
"""
for food in current_food.as_list():
food_distance.append(manhattan_distance(food, current_pos))
"""
Current food state is 50 times the number of food
Value for the maximum distance to a food in food distance list
Value for the minimum distance to a food in food distance list
"""
current_food_state = 50 * len(current_food.as_list())
max_food_dist = max(food_distance + [0.0])
min_food_dist = min(food_distance + [1000.0])
"""
Score calculate by taking the value from the function of get score of current game state
then subtracting the maximum and minimum food distance then adding the reciprocal of the
sum of all food distances. Then subtract the current number of food times 50 and add the
reciprocal of the minimum value in the food distance list
"""
score = (old_score - max_food_dist - min_food_dist +
1.0 / sum(food_distance + [0.001]) - current_food_state +
1.0 / min([food_distance, float("inf")]))
return score
def check_distance(pos_a, pos_b):
"""Get the manhattan distance between any two points."""
if (pos_a, pos_b) in DistanceManager.distances:
return DistanceManager.distances[(pos_a, pos_b)]
elif (pos_b, pos_a) in DistanceManager.distances:
return DistanceManager.distances[(pos_b, pos_a)]
else:
distance = manhattan_distance(pos_a, pos_b)
DistanceManager.distances[(pos_a, pos_b)] = distance
return distance
def zigzag(width, height, c_index):
# https://rosettacode.org/wiki/Zig-zag_matrix#Python
# modified by Keyi
corner_entries = [(0, 0), (width - 1, 0), (width - 1, height - 1),
(0, height - 1)]
corner = corner_entries[c_index]
index_order = sorted(
((x, y) for x in range(width) for y in range(height)),
key=lambda p: (manhattan_distance(p, corner)))
result = {}
for n, index in enumerate(index_order):
result[n] = index
return result
def averageCost(data, costF_idx, medoids_idx, cacheOn=False):
'''
Compute the average cost of medoids based on certain cost function and do the clustering
'''
# Init the cluster
size = len(data)
total_cost = {}
medoids = {}
for idx in medoids_idx:
medoids[idx] = []
total_cost[idx] = 0.0
# Compute the distance and do the clustering
for i in range(size):
choice = -1
# Make a big number
min_cost = float('inf')
for m in medoids:
if cacheOn == True:
# Check for cache
tmp = distances_cache.get((m,i), None)
if cacheOn == False or tmp == None:
if costF_idx == 0:
# euclidean_distance
tmp = euclidean_distance(data[m], data[i])
elif costF_idx == 1:
# manhattan_distance
tmp = manhattan_distance(data[m], data[i])
elif costF_idx == 2:
# pearson_distance
tmp = pearson_distance(data[m], data[i])
else:
print('Error: unknown cost function idx: ' % (costF_idx))
if cacheOn == True:
# Save the distance for acceleration
distances_cache[(m,i)] = tmp
# Clustering
if tmp < min_cost:
choice = m
min_cost = tmp
# Done the clustering
medoids[choice].append(i)
total_cost[choice] += min_cost
# Compute the average cost
avg_cost = 0.0
for idx in medoids_idx:
avg_cost += total_cost[idx] / len(medoids[idx])
# Return the average cost and clustering
return(avg_cost, medoids)
def assign_special_blocks(cluster, cluster_pos, bbox, board_layout,
used_spots):
special_blks = {}
cells = {}
for blk_id in cluster:
blk_type = blk_id[0]
if blk_type != "p" and blk_type != "r" and blk_type != "i":
if blk_type not in special_blks:
special_blks[blk_type] = 0
special_blks[blk_type] += 1
pos_x, pos_y = cluster_pos
width, height = bbox
centroid = pos_x + width // 2, pos_y + height / 2
for x in range(pos_x, pos_x + width):
for y in range(pos_y, pos_y + width):
blk_type = board_layout[y][x]
pos = (x, y)
if blk_type in special_blks and pos not in used_spots:
# we found one
if blk_type not in cells:
cells[blk_type] = set()
cells[blk_type].add(pos)
used_spots.add(pos)
if special_blks[blk_type] > 0:
special_blks[blk_type] -= 1
# here is the difficult part. if we still have blocks left to assign,
# we need to do an brute force search
available_pos = {}
for blk_type in special_blks:
available_pos[blk_type] = []
for y in range(len(board_layout)):
for x in range(len(board_layout[y])):
pos = (x, y)
blk_type = board_layout[y][x]
if pos not in used_spots and blk_type in special_blks:
available_pos[blk_type].append(pos)
for blk_type in special_blks:
num_blocks = special_blks[blk_type]
pos_list = available_pos[blk_type]
if len(pos_list) < num_blocks:
raise Exception("Not enough blocks left for type: " + blk_type)
pos_list.sort(key=lambda p: manhattan_distance(p, centroid))
for i in range(num_blocks):
if blk_type not in cells:
cells[blk_type] = set()
cells[blk_type].add(pos_list[i])
used_spots.add(pos_list[i])
return cells
def averageCost(data, costF_idx, medoids_idx, cacheOn=False):
'''
Compute the average cost of medoids based on certain cost function and do the clustering
'''
# Init the cluster
size = len(data)
total_cost = {}
medoids = {}
for idx in medoids_idx:
medoids[idx] = []
total_cost[idx] = 0.0
# Compute the distance and do the clustering
for i in range(size):
choice = -1
# Make a big number
min_cost = float('inf')
for m in medoids:
if cacheOn == True:
# Check for cache
tmp = distances_cache.get((m,i), None)
if cacheOn == False or tmp == None:
if costF_idx == 0:
# euclidean_distance
tmp = euclidean_distance(data[m], data[i])
elif costF_idx == 1:
# manhattan_distance
tmp = manhattan_distance(data[m], data[i])
elif costF_idx == 2:
# pearson_distance
tmp = pearson_distance(data[m], data[i])
else:
print('Error: unknown cost function idx: ' % (costF_idx))
if cacheOn == True:
# Save the distance for acceleration
distances_cache[(m,i)] = tmp
# Clustering
if tmp < min_cost:
choice = m
min_cost = tmp
# Done the clustering
medoids[choice].append(i)
total_cost[choice] += min_cost
# Compute the average cost
avg_cost = 0.0
for idx in medoids_idx:
avg_cost += total_cost[idx] / len(medoids[idx])
# Return the average cost and clustering
return(avg_cost, medoids)
def apply_action(state, action, agent_index):
"""Edit the state to reflect the results of the action."""
legal = AgentRules.get_legal_actions(state, agent_index)
if action not in legal:
raise Exception("Illegal action " + str(action))
# Update Configuration
agent_state = state.data.agent_states[agent_index]
speed = 1.0
# if agent_state.is_pacman: speed = 0.5
vector = Actions.direction_to_vector(action, speed)
old_config = agent_state.configuration
agent_state.configuration = old_config.generate_successor(vector)
# Eat
next = agent_state.configuration.get_position()
nearest = nearest_point(next)
if next == nearest:
is_red = state.is_on_red_team(agent_index)
# Change agent type
agent_state.is_pacman =\
[is_red, state.is_red(agent_state.configuration)
].count(True) == 1
# if he's no longer pacman, he's on his own side,
# so reset the num carrying timer
# agent_state.num_carrying *= int(agent_state.is_pacman)
if agent_state.num_carrying > 0 and not agent_state.is_pacman:
score = (agent_state.num_carrying if is_red else -1 *
agent_state.num_carrying)
state.data.score_change += score
agent_state.num_returned += agent_state.num_carrying
agent_state.num_carrying = 0
red_count = 0
blue_count = 0
for index in range(state.get_num_agents()):
agent_state = state.data.agent_states[index]
if index in state.get_red_team_indices():
red_count += agent_state.num_returned
else:
blue_count += agent_state.num_returned
if (((red_count >= (TOTAL_FOOD / 2) - MIN_FOOD)
or (blue_count >= (TOTAL_FOOD / 2) - MIN_FOOD))):
state.data._win = True
if agent_state.is_pacman and manhattan_distance(nearest, next) <= 0.9:
AgentRules.consume(nearest, state,
state.is_on_red_team(agent_index))
def enhanced_pacman_features(state, action):
"""
For each state, this function is called with each legal action.
It should return a counter with { <feature name> : <feature value>, ... }
"""
features = util.Counter()
"*** YOUR CODE HERE ***"
successor = state.generate_successor(0, action)
ghost_count = state.get_num_agents() - 1
for g in range(1, ghost_count):
feature_base_name = "ghost_" + str(g) + "_"
ghost_distance = util.manhattan_distance(
successor.get_pacman_position(), successor.get_ghost_position(g))
ghost_is_scared = successor.get_ghost_state(g).scared_timer > 0
features[feature_base_name + "is_scared"] = int(ghost_is_scared)
if ghost_is_scared:
features["scared_" + feature_base_name +
"distance"] = ghost_distance
features[feature_base_name + "distance"] = 0
else:
features["scared_" + feature_base_name + "distance"] = 0
features[feature_base_name + "distance"] = ghost_distance
capsules = successor.get_capsules()
min_cap_distance = None
if len(capsules) > 0:
for cap in capsules:
cap_distance = util.manhattan_distance(
successor.get_pacman_position(), cap)
if not min_cap_distance or min_cap_distance > cap_distance:
min_cap_distance = cap_distance
else:
min_cap_distance = 0
features["capsules_left"] = len(capsules)
features["nearest_capsule"] = min_cap_distance
features["score"] = successor.get_score()
return features
def main(input_file):
wire_paths = []
with open(input_file) as f:
while True:
line = f.readline().strip()
if not line:
break
path = line.split(',')
wire_paths.append(path)
logging.debug(wire_paths)
origin = (0, 0)
# convert the first wire to a list of line segments
# Segments are (start_point, end_point) tuples
wire1_segments = wire_to_segments(origin, wire_paths[0])
logging.debug("Wire1 Segments: " + str(wire1_segments))
# Walk along the second wire, finding all intersection_points
intersection_points = []
last_point = origin
for instruction in wire_paths[1]:
direction, count = split_instruction(instruction)
for _ in range(count):
new_point = (last_point[0] + direction[0],
last_point[1] + direction[1])
# Check if new point is inside any of the line segments of wire 1
for segment in wire1_segments:
if point_in_segment(new_point, segment):
intersection_points.append(new_point)
break
logging.debug("Point {} did not intersect".format(new_point))
last_point = new_point
logging.debug("Intersection Points: " + str(intersection_points))
min_point = None
min_distance = math.inf
for intersection in intersection_points:
dist = util.manhattan_distance(origin, intersection)
if dist < min_distance:
min_point = intersection
min_distance = dist
print(f"Minimal Distance To Intersection: {min_distance}")
def is_goal_state(self, state):
"""Return True if and only if the state is a valid goal state.
The state is Pacman's position.
Overrides PositionSearchProblem.is_goal_test
Fill this in with a goal test that will complete the problem
definition.
"""
distances = [(util.manhattan_distance(state, food), food)
for food in self.food.as_list()]
distance, food = min(distances)
if state == food:
return True
return False
def min_distance(coordinate, items):
'''
Finds which item in the list of items is closest to (x, y), according
to manhattan distance. Then returns the distance between the closest
item and (x, y).
Args:
coordinate (Coordinate): (x, y) coordinate of the point
items (list): List of coordinates
Returns:
An integer representing the distance between closest item and the
coordinate.
'''
if not items:
return Grid.MAX_DISTANCE
return min(util.manhattan_distance(coordinate, item) for item in items)
def main(input_file):
wire_paths = []
with open(input_file) as f:
while True:
line = f.readline().strip()
if not line:
break
path = line.split(',')
wire_paths.append(path)
logging.debug(wire_paths)
origin = (0,0)
# convert the first wire to a list of line segments
# Segments are (start_point, end_point) tuples
wire1_segments = wire_to_segments(origin, wire_paths[0])
logging.debug("Wire1 Segments: " + str(wire1_segments))
wire2_segments = wire_to_segments(origin, wire_paths[1])
logging.debug("Wire2 Segments: " + str(wire1_segments))
intersection_points = []
for segment_a in wire1_segments:
for segment_b in wire2_segments:
# Determine if segment a intersects with segment b
if(segments_intersect(segment_a, segment_b)):
logging.debug(f"Segment Intersection: {segment_a} and {segment_b}")
intersection_points.extend(segment_intersect_points(segment_a, segment_b))
logging.debug("Intersection Points: " + str(intersection_points))
min_point = None
min_distance = math.inf
for intersection in intersection_points:
if intersection == origin:
continue
dist = util.manhattan_distance(origin, intersection)
if dist < min_distance:
min_point = intersection
min_distance = dist
print(f"Minimal Distance To Intersection: {min_distance}")
def get_distribution(self, state):
"""Read variables from state"""
ghost_state = state.get_ghost_state(self.index)
legal_actions = state.get_legal_actions(self.index)
pos = state.get_ghost_position(self.index)
is_scared = ghost_state.scared_timer > 0
speed = 1
if is_scared:
speed = 0.5
action_vectors = [
Actions.direction_to_vector(
a, speed) for a in legal_actions]
new_positions = [(pos[0] + a[0], pos[1] + a[1])
for a in action_vectors]
pacman_position = state.get_pacman_position()
# Select best actions given the state
distances_to_pacman = [
manhattan_distance(
pos, pacman_position) for pos in new_positions]
if is_scared:
best_score = max(distances_to_pacman)
best_prob = self.prob_scared_flee
else:
best_score = min(distances_to_pacman)
best_prob = self.prob_attack
best_actions = [
action for action,
distance in zip(
legal_actions,
distances_to_pacman) if distance == best_score]
# Construct distribution
dist = util.Counter()
for a in best_actions:
dist[a] = best_prob / len(best_actions)
for a in legal_actions:
dist[a] += (1 - best_prob) / len(legal_actions)
dist.normalize()
return dist
def apply_action(state, action):
"""
Edits the state to reflect the results of the action.
"""
legal = PacmanRules.get_legal_actions(state)
if action not in legal:
raise Exception("Illegal action " + str(action))
pacman_state = state.data.agent_states[0]
# Update Configuration
vector = Actions.direction_to_vector(action, PacmanRules.PACMAN_SPEED)
pacman_state.configuration = pacman_state.configuration.generate_successor(vector)
# Eat
next = pacman_state.configuration.get_position()
nearest = nearest_point(next)
if manhattan_distance(nearest, next) <= 0.5:
# Remove food
PacmanRules.consume(nearest, state)
def corners_heuristic(state, problem):
"""Manhattan distance from each piece of the food to each other.
Args:
state: The current search state
(a data structure you chose in your search problem)
problem: The CornersProblem instance for this layout.
This function should always return a number that is a lower bound on the
shortest path from the state to a goal of the problem; i.e. it should be
admissible (as well as consistent).
"""
# some variables you may want to use:
# problem.corners -- these are the corner coordinates
# problem.walls -- these are the walls of the maze, as a Grid (game.py)
heuristic = 0
pos = copy.deepcopy(state[0])
corners = list(copy.deepcopy(state[1]))
while corners:
# get distance to each corner
distances = [util.manhattan_distance(pos, cur) for cur in corners]
# determine the shortest route
min_dist = min(distances)
# add up the total cost
heuristic = heuristic + min_dist
# establish where we are starting from next
pos = corners[distances.index(min_dist)]
# we've gotten this piece of food now, so we remove it
corners.remove(pos)
return heuristic
def deoverlap(self, cluster_cells, cluster_id, overlap_set):
effort_count = 0
old_overlap_set = len(overlap_set)
while len(overlap_set) > 0 and effort_count < 5:
# boolean board
bboard = self.__get_bboard(cluster_cells, False)
ext = self.__get_exterior_set(cluster_id, cluster_cells, bboard)
ext_list = list(ext)
ext_list.sort(
key=lambda p: manhattan_distance(p, self.center_of_board))
for ex in ext_list:
if len(overlap_set) == 0:
break
cell = overlap_set.pop()
cluster_cells[cluster_id].remove(cell)
cluster_cells[cluster_id].add(ex)
if len(overlap_set) == old_overlap_set:
effort_count += 1
else:
effort_count = 0
old_overlap_set = len(overlap_set)
assert (len(cluster_cells[cluster_id]) == self.get_cluster_size(
self.clusters[cluster_id]))
def get_paths_rec(self, current_path, end_x, end_y, steps, length):
"""
Recursive function that finds all valid paths from (x, y) to (end_x, end_y).
:return: List of paths. Path is a list of [(number, number_color), cell_color].
"""
x, y = current_path[-1]
# If end of steps
if steps == 0:
# And got to end, return path found
if current_path[-1] == (end_x, end_y):
return [current_path]
# Otherwise, path don't lead to end
else:
return []
# If end is too far for path or we got to a number (we checked earlier and this is not the end point)
# don't continue search for this direction
if manhattan_distance((x, y), (end_x, end_y)) > steps \
or (self.get_number_in_cell(x, y) != 0 and length - 1 != steps):
return []
# Collect valid paths from this point
paths = []
possible_steps = [(x + 1, y), (x - 1, y), (x, y + 1), (x, y - 1)]
for possible_step in possible_steps:
# If point not on board or point already in path, skip it
if possible_step[0] < 0 or self.get_height() <= possible_step[0] or possible_step[1] < 0 \
or self.get_width() <= possible_step[1] or possible_step in current_path:
continue
paths += self.get_paths_rec(current_path + [possible_step], end_x,
end_y, steps - 1, length)
return paths
def get_features(state, action):
features = dict()
# get the s'(next state) state to make calculations
next_state = state.next_state(action)
food = state.get_food()
snake_head = next_state.get_snake_head()
distance_to_food = util.manhattan_distance(snake_head, food)
# make distance_to_food between 0 and 1 so that it will not diverge with every update.
distance_to_food = float(distance_to_food) / (next_state.height *
next_state.width)
features['distance_to_food'] = distance_to_food
# 1 step away means that only the points that snake can move after one step.
# Therefore, it doesn't include diagonals and back of the snake as it cannot move there
from snake import Squares
# features['#_of_walls_1_step_away'] = get_adjacent_count(next_state,Squares.Wall)
tunnel_count, count = get_dead_end_count(next_state, Squares.Snake,
Squares.Wall)
# features['dead_end'] = 1 if tunnel_count == 2 or count == 3 else 0
depth = 12
features['new_dead_end'] = 1 if is_dead_end(state, action,
depth) else 0
features['is_end_game'] = 1 if next_state.check_end_game() else 0
util.divide_all(features, 100.0)
return features
def make_decision_by_nearest_position(self, cur_x, cur_y, cur_direction,
target):
'''
在当前舰艇四个方向邻域中寻找与目标最接近的坐标，作为下一步行动目的地，返回下一步行动
param:
cur_x, cur_y: 舰艇当前横纵坐标
cur_direction: 舰艇当前朝向
target: 目标舰艇坐标
return:
下一步行动 BoardAction 对象
'''
# 当前舰艇的四方向邻域坐标
neighbors = {
90: (cur_x, cur_y + 1),
180: (cur_x + 1, cur_y),
270: (cur_x, cur_y - 1),
0: (cur_x - 1, cur_y)
}
# 可供选择的行动策略
strategy_options = [{
'distance': manhattan_distance(target, neighbor),
'next_move': neighbor,
'angular_to_be': angular
} for angular, neighbor in neighbors.items()]
# 寻找与目标最接近的坐标
nearest_strategies = sorted(strategy_options,
key=lambda d: d['distance'])
for strategy in nearest_strategies:
if (self.is_decision_legal(*strategy['next_move'])):
return BoardAction(
stay=False,
clockwise=(strategy['angular_to_be'] - cur_direction) > 0,
angular_speed=abs(strategy['angular_to_be'] -
cur_direction))
def targetFunction(data, costF_idx, medoids_idx, cacheOn=False, distDict={},
simDict={}, affinities={}, costType=CostType,
namedPoints=True):
'''
Compute the average cost of medoids based on certain cost function
and do the clustering given the medoids
'''
if costType not in ["total", "average", "modularity"]:
print "unknown target function - check the global variables in the code"
return(1)
# Init the cluster
size = len(data)
total_cost = {}
medoids = {}
for idx in medoids_idx:
medoids[idx] = []
total_cost[idx] = 0.0
assignErrors = []
# Compute the distance and do the clustering
for i in range(size):
choice = -1
# Make a big number
min_cost = float('inf')
# medoids themselves are also included into resulting cluster lists
for m in medoids:
if cacheOn == True:
# Check for cache
tmp = distances_cache.get((m,i), None)
if cacheOn == False or tmp == None:
if costF_idx == 0:
# euclidean_distance
tmp = euclidean_distance(data[m], data[i])
elif costF_idx == 1:
# manhattan_distance
tmp = manhattan_distance(data[m], data[i])
elif costF_idx == 2:
# pearson_distance
tmp = pearson_distance(data[m], data[i])
elif costF_idx == 3:
# direct_distance
tmp = direct_distance(data[m], data[i], distDict)
elif costF_idx == 4:
# similarity_distance
tmp = similarity_distance(data[m], data[i], simDict)
else:
print('Error: unknown cost function idx: ' % (costF_idx))
if cacheOn == True:
# Save the distance for acceleration
distances_cache[(m,i)] = tmp
# Clustering
# Randomization for nodes/points isolated from all the medoids
# in order to assign them to random clusters. Hope averaging will
# be able to glean cases for which some medoids did appear in the
# same connected component, and group those nodes together.
if tmp==0.0 and min_cost==0.0: # no connection to either medoid
rv = bernoulli.rvs(1./len(medoids_idx), size=1)
if rv[0]==1.: choice = m
elif tmp < min_cost:
#if tmp < min_cost:
choice = m
min_cost = tmp
# Done the clustering
if choice == -1:
print "ERROR: the node cannot be assigned"
assignErrors.append(i)
else:
medoids[choice].append(i)
total_cost[choice] += min_cost
# Compute the target function
if costType == "total":
#print total_cost
return(sum(total_cost.values()), medoids)
elif costType == "average":
# Compute the average cost
avg_cost = 0.0
for idx in medoids_idx:
avg_cost += total_cost[idx] / len(medoids[idx])
# Return the average cost and clustering
return(avg_cost, medoids)
elif costType == "modularity":
# If the points are named, display the names
if namedPoints == True:
named_medoids = {}
for medID in medoids_idx:
named_medoids[data[medID]] = []
for pointID in medoids[medID]:
named_medoids[data[medID]].append(data[pointID])
# "-" because we maximize modularity
mod = -modularity(data, COST=costF_idx, distDict=distDict, edgeDict=affinities, medoids=named_medoids)
else:
mod = -modularity(data, COST=costF_idx, distDict=distDict, edgeDict=affinities, medoids=medoids)
print "modularity computed"
else:
print "unknown target function"
return(1)
if len(assignErrors) > 0:
print "unassigned nodes: ", assignErrors
else:
print "no unassigned nodes, all right"
return(mod, medoids)
def totalCost(data, costF_idx, medoids_idx, cacheOn=CacheOn, distDict={}, simDict={}, acceleration=0):
'''
Compute the total cost and do the clustering based on certain cost function
(that is, assign each data point to certain cluster given the medoids)
'''
# Init the cluster
size = len(data)
total_cost = 0.0
medoids = {}
for idx in medoids_idx:
medoids[idx] = []
# medoids['unassigned'] = []
unassigned = []
tmp = None
# Compute the distance and do the clustering
for i in xrange(size):
choice = -1
# Make a big number
min_cost = float('inf')
for m in medoids:
if cacheOn == True:
# Check for cache
tmp = distances_cache.get((m, i), None)
if cacheOn == False or tmp == None:
if costF_idx == 0:
# euclidean_distance
tmp = euclidean_distance(data[m], data[i])
elif costF_idx == 1:
# manhattan_distance
tmp = manhattan_distance(data[m], data[i])
elif costF_idx == 2:
# pearson_distance
tmp = pearson_distance(data[m], data[i])
elif costF_idx == 3:
# direct_distance
tmp = direct_distance(data[m], data[i], distDict)
elif costF_idx == 4:
# similarity_distance
try:
tmp = similarity_distance(data[m], data[i], simDict)
except:
print m, i
print data[m]
print data[i]
else:
print('Error: unknown cost function idx: %d' % (costF_idx))
if cacheOn == True:
# Save the distance for acceleration
distances_cache[(m, i)] = tmp
# Clustering
if tmp < min_cost:
choice = m
min_cost = tmp
# Done the clustering
if min_cost == 0: # 0 similarity to all the medoids
unassigned.append(i) # medoids['unassigned'].append(i)
else:
medoids[choice].append(i)
total_cost += min_cost
if acceleration == 2:
transformed_medoids = {} #dict(medoids)
for i, m in enumerate(medoids.keys()):
#print i, m
transformed_medoids[str(i)] = {'med': m, 'nodes': medoids[m]}
#transformed_medoids[i] = transformed_medoids.pop(m)
return (total_cost, transformed_medoids)
# Return the total cost and clustering
return (total_cost, medoids )
def squeeze(self):
# the idea is to pull every cell positions to the center of the board
def zigzag(width, height, c_index):
# https://rosettacode.org/wiki/Zig-zag_matrix#Python
# modified by Keyi
corner_entries = [(0, 0), (width - 1, 0), (width - 1, height - 1),
(0, height - 1)]
corner = corner_entries[c_index]
index_order = sorted(
((x, y) for x in range(width) for y in range(height)),
key=lambda p: (manhattan_distance(p, corner)))
result = {}
for n, index in enumerate(index_order):
result[n] = index
return result
cluster_pos = self.state
cluster_cells = {}
used_special_blocks_pos = set()
special_cells = {}
# make each position sets
for cluster_id in cluster_pos:
pos = cluster_pos[cluster_id]
cluster_size = self.get_cluster_size(self.clusters[cluster_id])
square_size = self.square_sizes[cluster_id]
bbox = self.compute_bbox(pos, square_size)
# find four corners and compare which one is closer
corners = [
pos, [pos[0] + bbox[0], pos[1]],
[pos[0] + bbox[0], pos[1] + bbox[1]],
[pos[0], pos[1] + bbox[1]]
]
dists = [
manhattan_distance(p, self.center_of_board) for p in corners
]
corner_index = np.argmin(dists)
# we need to create a zig-zag index to maximize packing cells given
# the bounding box
matrix = zigzag(bbox[0], bbox[1], corner_index)
# put into positions
cells = set()
count = 0
search_count = 0
while count < cluster_size:
cell_pos = matrix[search_count]
cell_pos = (pos[0] + cell_pos[0], pos[1] + cell_pos[1])
if self.is_cell_legal(None, cell_pos, self.clb_type):
cells.add(cell_pos)
count += 1
search_count += 1
cluster_cells[cluster_id] = cells
extra_cells = self.assign_special_blocks(self.clusters[cluster_id],
cluster_pos[cluster_id],
bbox, self.board_layout,
used_special_blocks_pos)
special_cells[cluster_id] = extra_cells
# now the fun part, lets squeeze more!
# algorithm
# in each iteration, each cluster selects top N manhattan distance cells
# and then move to its exterior.
# this avoids "mixture" boundary between two clusters in
# first step: remove overlaps
# several tweaks:
# because the middle ones have limited spaces. we de-overlap the middle
# ones first
cluster_ids = list(cluster_pos.keys())
cluster_ids.sort(key=lambda cid: manhattan_distance(
cluster_pos[cid], self.center_of_board))
special_working_set = set()
for cluster_id1 in cluster_ids:
overlap_set = set()
for cluster_id2 in cluster_cells:
if cluster_id1 == cluster_id2:
continue
overlap = cluster_cells[cluster_id1].intersection(
cluster_cells[cluster_id2])
overlap_set = overlap_set.union(overlap)
assert (len(cluster_cells[cluster_id1]) == self.get_cluster_size(
self.clusters[cluster_id1]))
# boolean board
bboard = self.__get_bboard(cluster_cells, False)
self.deoverlap(cluster_cells, cluster_id1, overlap_set)
if overlap_set:
print("Failed to de-overlap cluster ID:", cluster_id1,
"Heuristics will be used to put them together")
special_working_set.add(cluster_id1)
extra_cells = self.find_space(bboard, len(overlap_set))
for cell in extra_cells:
old_cell = overlap_set.pop()
cluster_cells[cluster_id1].remove(old_cell)
cluster_cells[cluster_id1].add(cell)
assert (not bboard[cell[1]][cell[0]])
assert (len(cluster_cells[cluster_id1]) == self.get_cluster_size(
self.clusters[cluster_id1]))
for i in self.clusters:
assert (len(cluster_cells[i]) == self.get_cluster_size(
self.clusters[i]))
# check no overlap
self.__get_bboard(cluster_cells)
# squeeze them to the center
for it in range(self.squeeze_iter):
# print("iter:", it)
for cluster_id in cluster_cells:
self.squeeze_cluster(cluster_cells, cluster_id)
for cluster_id in special_working_set:
while True:
num_moves = self.squeeze_cluster(cluster_cells, cluster_id)
if num_moves <= 5:
break
# merge them into per blk_type
result_cells = {}
for cluster_id in cluster_cells:
result_cells[cluster_id] = {"p": cluster_cells[cluster_id]}
# add special cells to the final position
for cluster_id in special_cells:
result_cells[cluster_id].update(special_cells[cluster_id])
# return centroids as well
centroids = compute_centroids(result_cells)
return result_cells, centroids
def min_manhattan_distance_heuristic_H(state, problem):
left_H = util.state_elem_pos(state, 'H', problem.grid_size)
dist_to_H = [util.manhattan_distance(state[0], xy) for xy in left_H]
return min(dist_to_H) if len(dist_to_H) else 0
def targetFunction(data,
costF_idx,
medoids_idx,
cacheOn=False,
distDict={},
simDict={},
affinities={},
costType=CostType,
namedPoints=True):
'''
Compute the average cost of medoids based on certain cost function
and do the clustering given the medoids
'''
if costType not in ["total", "average", "modularity"]:
print "unknown target function - check the global variables in the code"
return (1)
# Init the cluster
size = len(data)
total_cost = {}
medoids = {}
for idx in medoids_idx:
medoids[idx] = []
total_cost[idx] = 0.0
assignErrors = []
# Compute the distance and do the clustering
for i in range(size):
choice = -1
# Make a big number
min_cost = float('inf')
# medoids themselves are also included into resulting cluster lists
for m in medoids:
if cacheOn == True:
# Check for cache
tmp = distances_cache.get((m, i), None)
if cacheOn == False or tmp == None:
if costF_idx == 0:
# euclidean_distance
tmp = euclidean_distance(data[m], data[i])
elif costF_idx == 1:
# manhattan_distance
tmp = manhattan_distance(data[m], data[i])
elif costF_idx == 2:
# pearson_distance
tmp = pearson_distance(data[m], data[i])
elif costF_idx == 3:
# direct_distance
tmp = direct_distance(data[m], data[i], distDict)
elif costF_idx == 4:
# similarity_distance
tmp = similarity_distance(data[m], data[i], simDict)
else:
print('Error: unknown cost function idx: ' % (costF_idx))
if cacheOn == True:
# Save the distance for acceleration
distances_cache[(m, i)] = tmp
# Clustering
# Randomization for nodes/points isolated from all the medoids
# in order to assign them to random clusters. Hope averaging will
# be able to glean cases for which some medoids did appear in the
# same connected component, and group those nodes together.
if tmp == 0.0 and min_cost == 0.0: # no connection to either medoid
rv = bernoulli.rvs(1. / len(medoids_idx), size=1)
if rv[0] == 1.: choice = m
elif tmp < min_cost:
#if tmp < min_cost:
choice = m
min_cost = tmp
# Done the clustering
if choice == -1:
print "ERROR: the node cannot be assigned"
assignErrors.append(i)
else:
medoids[choice].append(i)
total_cost[choice] += min_cost
# Compute the target function
if costType == "total":
#print total_cost
return (sum(total_cost.values()), medoids)
elif costType == "average":
# Compute the average cost
avg_cost = 0.0
for idx in medoids_idx:
avg_cost += total_cost[idx] / len(medoids[idx])
# Return the average cost and clustering
return (avg_cost, medoids)
elif costType == "modularity":
# If the points are named, display the names
if namedPoints == True:
named_medoids = {}
for medID in medoids_idx:
named_medoids[data[medID]] = []
for pointID in medoids[medID]:
named_medoids[data[medID]].append(data[pointID])
# "-" because we maximize modularity
mod = -modularity(data,
COST=costF_idx,
distDict=distDict,
edgeDict=affinities,
medoids=named_medoids)
else:
mod = -modularity(data,
COST=costF_idx,
distDict=distDict,
edgeDict=affinities,
medoids=medoids)
print "modularity computed"
else:
print "unknown target function"
return (1)
if len(assignErrors) > 0:
print "unassigned nodes: ", assignErrors
else:
print "no unassigned nodes, all right"
return (mod, medoids)
