def placeFood():
"""Compute doboggi screen positions and instantiate doboggi objects.
Returns: a list of doboggi objects.
"""
food = []
Upper = True
for i in range(0, FOODMAX):
ok = False
while not ok: # loop until proper position was computed:
r_x = random.randrange(-X_MAX + 20, X_MAX - 20)
if Upper:
# Position above the ghosts:
r_y = random.randrange(160, Y_MAX)
else:
# Position below the ghosts:
r_y = random.randrange(-Y_MAX, -40)
new_pos = (r_x, r_y)
HaveCollision = False
for i in food:
HaveCollision = HaveCollision or checkCollision(
new_pos, i.getPosition())
if not HaveCollision:
food.append(doboggi(r_x, r_y))
ok = True
Upper = not Upper # toggle between ``above'' and ``below" ghost's
# screen part.
return food
def periodicTimer():
global isQuit
global food
global score # pacman's achieved score
turtle.tracer(0, 0) # disable screen updates
p_old = pm.getPosition()
pm.move() # move pacman
p_new = pm.getPosition()
# Check for illegal moves:
if (abs(p_old[0] - p_new[0]) > 12) or (abs(p_old[1] - p_new[1]) > 12):
print('Illegal move, game terminated.')
isQuit = True
turtle.update() # force turtle module's screen update
turtle.tracer(1, 10) # re-enable periodic screen updates
pm.decrementSteps() # pacman made one step, decrement counter
if pm.getRemainingSteps() == 0:
print('You ran out of steps!')
isQuit = True
pm_pos = pm.getPosition()
# check collisions pm versus food:
eaten_dishes = []
for dish in food:
if checkCollision(pm_pos, dish.getPosition()):
pm.setIsYum()
dish.setIsEaten()
eaten_dishes.append(dish)
score += 1
# Remove eaten dishes (cannot remove while iterating!):
for dish in eaten_dishes:
food.remove(dish)
# Check if all food has been eaten already:
if len(food) == 0:
print('Congratulation, all food collected.')
isQuit = True
if isQuit:
# Game will terminate, put the "Game Over" image:
game_over.setposition(0, -HEIGHT//2 + 22)
game_over.shape('game_over.gif')
game_over.showturtle()
# Trigger the shutdown handler function to be called in MS_TO_QUIT ms
# from now:
window.ontimer(shutDownHander, MS_TO_QUIT)
else:
# Trigger the next firing of our timer function, in 90ms from now:
window.ontimer(periodicTimer, 90)
def periodicTimer():
"""Timer function which is called periodically by Python.
This function implements the game logic:
- creating all objects
- arranging objects on the screen
- calling object's move() methods
- checking for collisions
- checking for invalid moves
- detection program termination conditions (all food eaten, ...)
- initiate termination
"""
global phase
global isQuit
global food
global score # doboggi_man's achieved score
turtle.tracer(0, 0) # disable screen updates
for g in ghosts:
g.updateShape() # make ghost change its shape
g.move() # move ghost
if phase % 4 == 0:
# pm shape is updated every 4th iteration.
pm.updateShape() # make doboggi_man change its shape
p_old = pm.getPosition()
pm.move() # move doboggi_man
p_new = pm.getPosition()
# Check for illegal moves:
if (abs(p_old[0] - p_new[0]) > 12) or (abs(p_old[1] - p_new[1]) > 12):
print('Illegal move, game terminated.')
isQuit = True
turtle.update() # force turtle module's screen update
turtle.tracer(1, 10) # re-enable periodic screen updates
pm.decrementSteps() # doboggi_man made one step, decrement counter
if pm.getRemainingSteps() == 0:
print('You ran out of steps!')
isQuit = True
# check collisions pm versus ghosts:
pm_pos = pm.getPosition()
for g in ghosts:
if checkCollision(pm_pos, g.getPosition()):
isQuit = True
print('You bumped into a ghost!')
# check collisions pm versus food:
eaten_dishes = []
for dish in food:
if checkCollision(pm_pos, dish.getPosition()):
pm.setIsYum()
dish.setIsEaten()
eaten_dishes.append(dish)
score += 1
# Remove eaten dishes (cannot remove while iterating!):
for dish in eaten_dishes:
food.remove(dish)
# Check if all food has been eaten already:
if len(food) == 0:
print('Congratulation, all food collected.')
isQuit = True
if phase == 7:
phase = 0
else:
phase += 1
if isQuit:
# Game will terminate, put the "Game Over" image:
game_over.setposition(0, -HEIGHT // 2 + 22)
game_over.shape('img/game_over.gif')
game_over.showturtle()
# Trigger the shutdown handler function to be called in MS_TO_QUIT ms
# from now:
window.ontimer(shutDownHander, MS_TO_QUIT)
else:
# Trigger the next firing of our timer function, in 90ms from now:
window.ontimer(periodicTimer, 90)