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grid.py
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grid.py
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from queue import Queue, PriorityQueue
import pygame as py
import time
import math
#window size
WINDOW_WIDTH = 1202
WINDOW_HEIGHT = 685
#simple color
white = (255, 255, 255)
black = (0, 0, 0)
red = (255, 0, 0)
green = (0, 255, 0)
light_green = (104, 255, 104)
red_light = (255, 50, 50)
class Grid:
def __init__(self,rows, cols, window=None, width=None, height=None):
self.rows = rows
self.cols = cols
self.window = window
self.width = width
self.height = height
self.selected = None
self.cubes = [[Cubes(i, j) for j in range(cols)] for i in range(rows)]
self.x = 0
self.y = 0
if self.width is not None:
self.dif = self.width // cols
count = 0
#making the grid as a graph with connections with each other when the grid is initialized
for i in range(rows):
for j in range(cols):
self.cubes[i][j].make_values(count)
count+=1
for i in range(rows):
for j in range(cols):
if ( rows-1) > i > 0 and 0 < j < (cols-1):
self.cubes[i][j].make_connections(left=self.cubes[i][j-1], right=self.cubes[i][j+1], up=self.cubes[i-1][j], down=self.cubes[i+1][j])
elif i == 0:
if j == 0:
self.cubes[i][j].make_connections(right=self.cubes[i][j+1], down=self.cubes[i+1][j] )
elif j == cols - 1:
self.cubes[i][j].make_connections(left=self.cubes[i][j-1], down=self.cubes[i+1][j] )
else:
self.cubes[i][j].make_connections(left=self.cubes[i][j-1], right=self.cubes[i][j+1], down=self.cubes[i+1][j] )
elif i == (rows-1):
if j == 0:
self.cubes[i][j].make_connections(right=self.cubes[i][j+1], up=self.cubes[i-1][j] )
elif j == cols - 1:
self.cubes[i][j].make_connections(left=self.cubes[i][j-1], up=self.cubes[i-1][j] )
else:
self.cubes[i][j].make_connections(left=self.cubes[i][j-1], right=self.cubes[i][j+1], up=self.cubes[i-1][j] )
else:
if j == 0:
self.cubes[i][j].make_connections(right=self.cubes[i][j+1], up=self.cubes[i-1][j], down=self.cubes[i+1][j] )
else:
self.cubes[i][j].make_connections(left=self.cubes[i][j-1], up=self.cubes[i-1][j], down=self.cubes[i+1][j] )
def get_cord(self,pos):
#get position of the mouse when clicked in the box
click_x = pos[0] // self.dif
click_y = pos[1] // self.dif
return (click_x, click_y)
def draw(self):
#the grid is drawn
self.window.fill((20, 100, 50))
for i in range((self.rows+1)):
py.draw.line(self.window, (255, 255, 255), (self.x, i * self.dif ), (self.width, i * self.dif), 1)
py.draw.line(self.window, (244, 244, 244), (i * self.dif, self.y), (i * self.dif, self.height), 1)
def select_start(self, row, col):#get starting position
py.draw.rect(self.window, (255, 0, 0), (row * self.dif, col * self.dif, self.dif, self.dif))
def select_end(self, row, col):#get/draw end position
py.draw.rect(self.window, (255, 153, 153), (row * self.dif, col * self.dif, self.dif, self.dif) )
def get_cubes(self):
return self.cubes
def add_blocks(self, row, col):#method to add blocks to the path
self.cubes[row][col].block_cell()
def remove_blocks(self, row, col):#method to add blocks to the path
self.cubes[row][col].unblock_cell()
class Cubes:
def __init__(self, row, column):
self.row = row
self.column = column
self.value = None
self.blocked = False
def make_values(self, value):#add value to each cube
self.value = value
def make_connections(self, left=None, right=None, up=None, down=None):#make the graph of each cube in the graph
self.left = left
self.right = right
self.up = up
self.down = down
def value(self):
return self.value
def print_row_col(self):
return self.row, self.column
def show_connections(self):
# print(f"row={self.row}, column={self.column}, right={self.right}, left={self.left}, up={self.up}, down={self.down}, value={self.value}")
return [self.left, self.right, self.up, self.down]
def block_cell(self):#turns the cube into a blocked cube
self.blocked = True
def unblock_cell(self):
self.blocked = False
def get_cell_condition(self):
return self.blocked
#button function
#x=top-left corner of the rectangle x-coordinate
#y=top-left corner of the rectangle y-coordinate
#w=width of the rectangle
#h=height of the rectangle
#ic=inactive button color
#ac=if button is pressed
def button (msg, x, y, w, h, ic, ac, action=None, parameters=None):
mouse = py.mouse.get_pos()
click = py.mouse.get_pressed()
if x + w > mouse[0] > x and y + h > mouse[1] > y:
py.draw.rect(screen, ac, (x, y, w, h))
if click[0] == 1 and action != None:
if parameters:
action(parameters)
else:
action()
else:
py.draw.rect(screen, ic, (x, y, w, h))
smallText = smallfont.render(msg, True, black)
textRect = smallText.get_rect()
textRect.center = ( (x+(w/2)), (y+(h/2)) )
screen.blit(smallText, textRect)
#####################first menu loop########################
def intro():
while True:
for event in py.event.get():
if event.type == py.QUIT:
py.quit()
quit()
screen.fill((200, 100, 50))
textSurface = myfont.render("Path algorithms", True, white )
textRect = textSurface.get_rect()
textRect.center = (WINDOW_WIDTH/2), (WINDOW_HEIGHT/16)
screen.blit(textSurface, textRect)
smalltext = smallfont.render("double press mouse to continue", True, black)
smaltextRect = smalltext.get_rect()
smaltextRect.center = (WINDOW_WIDTH/2), (WINDOW_HEIGHT-30)
screen.blit(smalltext, smaltextRect)
button("BFS", 300, 450, 100, 50, green, light_green, BFS_loop )
button("DFS", 150, 450, 100, 50, green, light_green, dfs_loop)
button("Birdirectional", 500, 450, 150, 50, green, light_green, Bidirectional_loop)
button("A Star", 700, 450, 100, 50, green, light_green, a_star_loop)
py.display.update()
clock.tick(15)
#####################menu loop ends here####################
##############################
############################
########################
########################
###BIDIRECTIONAL PATH ALGORITHM##########################
def Bidirectional_traversal( s, e, rows, cols):
q = Queue()
z = Queue()
q.put(s)
z.put(e)
traversal = []
traversal.append(s)
traversal.append(e)
parentMap_start = {}
parentMap_end = {}
visited_end = [False for i in range(rows * cols)]
visited_start = [False for i in range(rows * cols)]
visited_end[e.value] = True
visited_start[s.value] = True
flag = True
intersection = None
while not q.empty() and not z.empty():
v = q.get()
w = z.get()
if not flag:
break
for node in v.show_connections():
if node and not node.get_cell_condition():
if not visited_start[node.value]:
visited_start[node.value] = True
if visited_end[node.value]:
intersection = node
flag = False
traversal.append(node)
# print(node.value)
q.put(node)
parentMap_start[node] = v
if flag:
for node in w.show_connections():
if node and not node.get_cell_condition():
if not visited_end[node.value]:
visited_end[node.value] = True
if visited_start[node.value]:
intersection = node
flag = False
traversal.append(node)
# print(node.value)
z.put(node)
parentMap_end[node] = w
return (parentMap_start, parentMap_end), traversal, intersection
def Bidirectional_loop():
gridSurface = py.Surface((601, 600))
state = True
rows = 50
cols = 50
grid = Grid(rows, cols, gridSurface, 601, 600 )
clicked = None
run = True
once = True
complete_first_time = False
end = False
start = False
find = False
starting_position = None
end_position = None
cubes_ = grid.get_cubes()
make_wall = False
del_wall = False
diff = WINDOW_WIDTH // 100
blocks = {}
while run:
#drawing the grid
grid.draw()
screen.fill(white)
button("Start position", 50, 610, 135, 50, red, red_light)
button("End position", 190, 610, 130, 50, red, red_light)
button("Main Menu", 1070, 610, 110, 50, red, red_light, intro)
button("Add blocks", 800, 610, 110, 50, red, red_light)
button("Remove blocks", 920, 610, 140, 50, red, red_light)
for event in py.event.get():
if event.type == py.QUIT:
run = False
if event.type == py.MOUSEBUTTONDOWN:
pos = py.mouse.get_pos()
clicked = grid.get_cord(pos)
if state: #pause button imitator
# if one of the button is clicked then the it performs the action related to it
if clicked:
if (50 + 135) > pos[0] > 50 and (610 + 50) > pos[1] > 610:
start = True
if (190 + 130) > pos[0] > 190 and (610 + 50) > pos[1] > 610:
start = False
end = True
if end_position and starting_position:
if not once:
if (500 + 200) > pos[0] > 500 and (610 + 50) > pos[1] > 610:
find = True
end = False
if (800 + 110) > pos[0] > 800 and (610 + 50) > pos[1] > 610:
start = False
end = False
find = False
make_wall = True
if (920 + 140) > pos[0] > 920 and (610 + 50) > pos[1] > 610:
start = False
end = False
find = False
make_wall = False
del_wall = True
if start: # if start is clicked then we can then select some box in the grid and it will be highlighted in red color
if blocks: #showing the blocked boxes
for i in blocks.values():
py.draw.rect(gridSurface, (0, 0, 0), (i[0] * diff, i[1] * diff, diff, diff))
grid.select_start(clicked[0], clicked[1])
starting_position = clicked
screen.blit(gridSurface, (0, 0))
py.display.update()
elif end: # likewise for the end position but in pink color
if blocks: #showing the blocked boxes
for i in blocks.values():
py.draw.rect(gridSurface, (0, 0, 0), (i[0] * diff, i[1] * diff, diff, diff))
grid.select_end(clicked[0], clicked[1])
end_position = clicked
if starting_position:
grid.select_start(starting_position[0], starting_position[1])
button("Find path", 500, 610, 200, 59, red, red_light)
screen.blit(gridSurface, (0, 0))
py.display.update()
elif find: # the path finding occurs in here
if (starting_position[0] < 50 and starting_position[1] < 50) and (end_position[0] < 50 and end_position[1] < 50):
if blocks: #showing the blocked boxes
for i in blocks.values():
py.draw.rect(gridSurface, (0, 0, 0), (i[0] * diff, i[1] * diff, diff, diff))
screen.blit(gridSurface, (0, 0))
py.display.update()
# the function returns the dictionary of the path that it took to get the end position but is in reverse order and also the traversal path
path, traversal, intersection = Bidirectional_traversal( cubes_[ int( starting_position[0] ) ] [ int( starting_position[1] ) ] , cubes_[ int( end_position[0] ) ] [ int(end_position[1]) ], rows, cols)
for i in traversal: #shows the traversal
b = py.draw.rect(screen, (255, 50, 100), (i.print_row_col()[0] * diff, i.print_row_col()[1] * diff, diff, diff), 1)
py.display.update(b)
py.time.delay(3)
grid.select_start(starting_position[0], starting_position[1])
grid.select_end(end_position[0], end_position[1])
screen.blit(gridSurface, (0, 0))
py.display.update()
py.time.delay(10)
# starting node
curr = path[0] [intersection]
grid.select_end(curr.print_row_col()[0], curr.print_row_col()[1])
# to highlight the path
bo = py.draw.rect(gridSurface, (255, 0, 0), (intersection.print_row_col()[0] * diff, intersection.print_row_col()[1] * diff, diff, diff), 1)
py.display.update(bo)
while curr != cubes_[ int( starting_position[0] ) ] [ int( starting_position[1]) ]:
bo = py.draw.rect(gridSurface, (255, 0, 0), (curr.print_row_col()[0] * diff, curr.print_row_col()[1] * diff, diff, diff), 1)
if not complete_first_time:
screen.blit(gridSurface, (0, 0))
py.display.update(bo)
py.time.delay(10)
curr = path[0] [curr]
curr = path[1] [intersection]
while curr != cubes_[ int( end_position[0] ) ] [ int( end_position[1]) ]:
bo = py.draw.rect(gridSurface, (255, 0, 0), (curr.print_row_col()[0] * diff, curr.print_row_col()[1] * diff, diff, diff), 1)
if not complete_first_time:
screen.blit(gridSurface, (0, 0))
py.display.update(bo)
py.time.delay(10)
curr = path[1] [curr]
state = False # to pause the loop---kind of!
if not complete_first_time:
complete_first_time = True
screen.blit(gridSurface, (0, 0))
py.display.update()
else:
if (starting_position[0] > 50 or starting_position[1] > 50):
button("Please Select a Starting Position!", 602, 10, 400, 50, red, red)
screen.blit(gridSurface, (0, 0))
py.display.update()
elif (end_position[0] > 50 or end_position[1] > 50):
button("Please select an End Position!", 602, 0, 400, 50, red, red)
screen.blit(gridSurface, (0, 0))
py.display.update()
else:
button("Please select both Positions!", 602, 0, 400, 50, red, red)
screen.blit(gridSurface, (0, 0))
py.display.update()
elif make_wall:
if (clicked[0] < 50 and clicked[1] < 50): #to ensure that the clicked has tuple that is on the grid
bo = py.draw.rect(gridSurface, (0, 0, 0), (clicked[0] * diff, clicked[1] * diff, diff, diff))
blocks[ cubes_[clicked[0]] [clicked[1]].value ] = clicked
grid.add_blocks(clicked[0], clicked[1])
screen.blit(gridSurface, (0, 0))
py.display.update(bo)
elif del_wall:
if (clicked[0] < 50 and clicked[1] < 50): #to ensure that the clicked has tuple that is on the grid
if blocks:
try:
del blocks[ cubes_[clicked[0]] [clicked[1]].value ]
grid.remove_blocks(clicked[0], clicked[1])
for i in blocks.values():
py.draw.rect(gridSurface, (0, 0, 0), (i[0] * diff, i[1] * diff, diff, diff))
if starting_position and end_position:
button("Find path", 500, 610, 200, 59, red, red_light)
grid.select_start(starting_position[0], starting_position[1])
grid.select_end(end_position[0], end_position[1])
screen.blit(gridSurface, (0, 0))
py.display.update()
except Exception:
pass
else:# same function but it just shows the same path but it will show all the path at once
if blocks: #showing the blocked boxes
for i in blocks.values():
py.draw.rect(gridSurface, (0, 0, 0), (i[0] * diff, i[1] * diff, diff, diff))
grid.select_start(starting_position[0], starting_position[1])
curr = cubes_[ int( end_position[0] ) ] [ int(end_position[1]) ]
grid.select_end(curr.print_row_col()[0], curr.print_row_col()[1])
curr = path[0] [intersection]
# to highlight the path
bo = py.draw.rect(gridSurface, (255, 0, 0), (intersection.print_row_col()[0] * diff, intersection.print_row_col()[1] * diff, diff, diff), 1)
py.display.update(bo)
while curr != cubes_[ int( starting_position[0] ) ] [ int( starting_position[1]) ]:
bo = py.draw.rect(gridSurface, (255, 0, 0), (curr.print_row_col()[0] * diff, curr.print_row_col()[1] * diff, diff, diff), 1)
if not complete_first_time:
screen.blit(gridSurface, (0, 0))
py.display.update(bo)
py.time.delay(10)
curr = path[0] [curr]
curr = path[1] [intersection]
while curr != cubes_[ int( end_position[0] ) ] [ int( end_position[1]) ]:
bo = py.draw.rect(gridSurface, (255, 0, 0), (curr.print_row_col()[0] * diff, curr.print_row_col()[1] * diff, diff, diff), 1)
if not complete_first_time:
screen.blit(gridSurface, (0, 0))
py.display.update(bo)
py.time.delay(10)
curr = path[1] [curr]
state = False # to pause the loop---kind of!
if not complete_first_time:
complete_first_time = True
screen.blit(gridSurface, (0, 0))
py.display.update()
button("Refresh", 500, 610, 200, 59, red, red_light, Bidirectional_loop )
screen.blit(gridSurface, (0, 0))
py.display.update()
if once:
once = False
screen.blit(gridSurface, (0, 0))
py.display.update()
clock.tick(60)
py.quit()
quit()
###############Bidirectional path visualization ends here################################
#### ####### ######## #############################################
#### #### ####### ############ ###################################################
#### ######### ########### ###############################################
#### #### ####### ################# ##############################################
#### ######## ############ ###############################################
def BFS(s, e, visited, q):
visited[s.value] = True
traversal = []
parentMap = {}
q.put(s)
traversal.append(s)
while not q.empty():
v = q.get()
if v.value == e.value:
break
for node in v.show_connections():
if node and not node.get_cell_condition():
if not visited[node.value] :
visited[node.value] = True
traversal.append(node)
# print(node.value, node.print_row_col())
q.put(node)
parentMap[node] = v
return parentMap, traversal
def BFS_starter(window, s, e, rows, cols):
q = Queue()
visited = [False for i in range(rows*cols)]
path = BFS(s, e, visited, q)
return path
def BFS_loop():
gridSurface = py.Surface((601, 600))
state = True
rows = 50
cols = 50
grid = Grid(rows, cols, gridSurface, 601, 600 )
clicked = None
run = True
once = True
complete_first_time = False
end = False
start = False
find = False
starting_position = None
end_position = None
make_wall = False
diff = WINDOW_WIDTH // 100
blocks = {}
cubes_ = grid.get_cubes()
del_wall = False
while run:
#drawing the grid
grid.draw()
screen.fill(white)
button("Start position", 50, 610, 135, 50, red, red_light)
button("End position", 190, 610, 130, 50, red, red_light)
button("Main Menu", 1070, 610, 110, 50, red, red_light, intro)
button("Add blocks", 800, 610, 110, 50, red, red_light)
button("Remove blocks", 920, 610, 140, 50, red, red_light)
for event in py.event.get():
if event.type == py.QUIT:
run = False
if event.type == py.MOUSEBUTTONDOWN:
pos = py.mouse.get_pos()
clicked = grid.get_cord(pos)
if state: #pause button imitator
# if one of the button is clicked then the it performs the action related to it
if clicked:
if (50 + 135) > pos[0] > 50 and (610 + 50) > pos[1] > 610:
start = True
if (190 + 130) > pos[0] > 190 and (610 + 50) > pos[1] > 610:
start = False
end = True
if end_position and starting_position:
if not once:
if (500 + 200) > pos[0] > 500 and (610 + 50) > pos[1] > 610:
find = True
end = False
if (800 + 110) > pos[0] > 800 and (610 + 50) > pos[1] > 610:
start = False
end = False
find = False
make_wall = True
if (920 + 140) > pos[0] > 920 and (610 + 50) > pos[1] > 610:
start = False
end = False
find = False
make_wall = False
del_wall = True
if start: # if start is clicked then we can then select some box in the grid and it will be highlighted in red color
if blocks: #showing the blocked boxes
for i in blocks.valuse():
py.draw.rect(gridSurface, (0, 0, 0), (i[0] * diff, i[1] * diff, diff, diff))
grid.select_start(clicked[0], clicked[1])
starting_position = clicked
screen.blit(gridSurface, (0, 0))
py.display.update()
elif end: # likewise for the end position but in pink color
if blocks: #showing the blocked boxes
for i in blocks.values():
py.draw.rect(gridSurface, (0, 0, 0), (i[0] * diff, i[1] * diff, diff, diff))
grid.select_end(clicked[0], clicked[1])
end_position = clicked
if starting_position:
grid.select_start(starting_position[0], starting_position[1])
button("Find path", 500, 610, 200, 59, red, red_light)
screen.blit(gridSurface, (0, 0))
py.display.update()
elif find: # the path finding occurs in here
if (starting_position[0] < 50 and starting_position[1] < 50) and (end_position[0] < 50 and end_position[1] < 50):
if blocks: #showing the blocked boxes
for i in blocks.values():
py.draw.rect(gridSurface, (0, 0, 0), (i[0] * diff, i[1] * diff, diff, diff))
# the function returns the dictionary of the path that it took to get the end position but is in reverse order and also the traversal path
path, traversal = BFS_starter( gridSurface, cubes_[ int( starting_position[0] ) ] [ int( starting_position[1] ) ] , cubes_[ int( end_position[0] ) ] [ int(end_position[1]) ], rows, cols)
for i in traversal: #shows the traversal
b = py.draw.rect(screen, (255, 50, 100), (i.print_row_col()[0] * diff, i.print_row_col()[1] * diff, diff, diff), 1)
py.display.update(b)
py.time.delay(3)
grid.select_start(starting_position[0], starting_position[1])
grid.select_end(end_position[0], end_position[1])
screen.blit(gridSurface, (0, 0))
py.display.update()
py.time.delay(10)
# starting node
curr = cubes_[ int( end_position[0] ) ] [ int(end_position[1]) ]
curr = path[curr]
grid.select_end(curr.print_row_col()[0], curr.print_row_col()[1])
# to highlight the path
while curr != cubes_[ int( starting_position[0] ) ] [ int( starting_position[1]) ]:
bo = py.draw.rect(gridSurface, (255, 0, 0), (curr.print_row_col()[0] * diff, curr.print_row_col()[1] * diff, diff, diff), 1)
if not complete_first_time:
screen.blit(gridSurface, (0, 0))
py.display.update(bo)
py.time.delay(10)
curr = path[curr]
state = False # to pause the loop---kind of!
if not complete_first_time:
complete_first_time = True
screen.blit(gridSurface, (0, 0))
py.display.update()
else:
if (starting_position[0] > 50 or starting_position[1] > 50):
button("Please Select a Starting Position!", 602, 10, 400, 50, red, red)
screen.blit(gridSurface, (0, 0))
py.display.update()
elif (end_position[0] > 50 or end_position[1] > 50):
button("Please select an End Position!", 602, 0, 400, 50, red, red)
screen.blit(gridSurface, (0, 0))
py.display.update()
else:
button("Please select both Positions!", 602, 0, 400, 50, red, red)
screen.blit(gridSurface, (0, 0))
py.display.update()
elif make_wall:
if (clicked[0] < 50 and clicked[1] < 50): #to ensure that the clicked has tuple that is on the grid
bo = py.draw.rect(gridSurface, (0, 0, 0), (clicked[0] * diff, clicked[1] * diff, diff, diff))
blocks[ cubes_[clicked[0]] [clicked[1]].value ] = clicked
grid.add_blocks(clicked[0], clicked[1])
screen.blit(gridSurface, (0, 0))
py.display.update(bo)
elif del_wall:
if (clicked[0] < 50 and clicked[1] < 50): #to ensure that the clicked has tuple that is on the grid
if blocks:
try:
del blocks[ cubes_[clicked[0]] [clicked[1]].value ]
grid.remove_blocks(clicked[0], clicked[1])
for i in blocks.values():
py.draw.rect(gridSurface, (0, 0, 0), (i[0] * diff, i[1] * diff, diff, diff))
if starting_position and end_position:
button("Find path", 500, 610, 200, 59, red, red_light)
grid.select_start(starting_position[0], starting_position[1])
grid.select_end(end_position[0], end_position[1])
screen.blit(gridSurface, (0, 0))
py.display.update()
except Exception:
pass
else:# same function but it just shows the same path but it will show all the path at once
if blocks: #showing the blocked boxes
for i in blocks.values():
py.draw.rect(gridSurface, (0, 0, 0), (i[0] * diff, i[1] * diff, diff, diff))
grid.select_start(starting_position[0], starting_position[1])
curr = cubes_[ int( end_position[0] ) ] [ int(end_position[1]) ]
grid.select_end(curr.print_row_col()[0], curr.print_row_col()[1])
curr = path[curr]
diff = WINDOW_WIDTH // 100
while curr != cubes_[ int( starting_position[0] ) ] [ int( starting_position[1]) ]:
py.draw.rect(gridSurface, (255, 0, 100), (curr.print_row_col()[0] * diff, curr.print_row_col()[1] * diff, diff, diff), 1)
curr = path[curr]
button("Refresh", 500, 610, 200, 59, red, red_light, BFS_loop )
screen.blit(gridSurface, (0, 0))
py.display.update()
if once:
once = False
screen.blit(gridSurface, (0, 0))
py.display.update()
clock.tick(60)
py.quit()
quit()
#############################**************************###############################
############ ########## ######## ######################################################
############ ####### ######### ############## ###############################################
############ ######## ######## ############### #####################################
############ ######### ####### ################# #############################################
############ ######## ######## ############## ###### ###########################################
############ ######### ############### ###############################################
def DFS_starter(window, s, e, rows, cols):
visited = [False for i in range(rows*cols)]
stack = []
path = DFS(window, visited, s, e, stack)
return path
def DFS(window, visited, s, e, stack):
parentMap = {} #for storing the vertex parent -- where the path came from to that node
stack.append(s)
traversal = []
while(len(stack)):
s = stack[-1]
stack.pop()
if s.value== e.value:
break
if ( not visited[s.value]):
# print(s.value, end=" ")
traversal.append(s)
visited[s.value] = True
for node in s.show_connections():
if node and not node.get_cell_condition():
if ( not visited[node.value]):
stack.append(node)
parentMap[node] = s
return parentMap, traversal
def dfs_loop():
gridSurface = py.Surface((601, 600))
state = True
rows = 50
cols = 50
grid = Grid(rows, cols, gridSurface, 601, 600 )
clicked = None
run = True
once = True
complete_first_time = False
end = False
start = False
find = False
starting_position = None
end_position = None
make_wall = False
del_wall = False
diff = WINDOW_WIDTH // 100