def main():
# How many fruits collected, displayed on game over
score = 0
# The snake (:
snake = Snake(spawn_coord=snake_spawn_coord, spawn_length=snake_spawn_length, spawn_dir=snake_spawn_direction)
# Generate the first fruit
fruit = Fruit(avoid_snake=snake)
# The gameboard
checker_board = CheckerBoard(b_width=width, b_height=height, b_tilesize=tilesize)
# ###### Main game loop ###### #
while True:
for ev in pg.event.get(): # ev : event
if ev.type == QUIT:
pg.quit()
kill_everything()
elif ev.type == KEYDOWN:
k = ev.key
# Could use a for loop, but this is more readable
if k == K_UP or k == k_up_a:
snake.change_direction(NORTH)
elif k == K_RIGHT or k == k_right_a:
snake.change_direction(EAST)
elif k == K_DOWN or k == k_down_a:
snake.change_direction(SOUTH)
elif k == K_LEFT or k == k_left_a:
snake.change_direction(WEST)
# Limit user to one keypress per frame, this has the drawback that pressing two keys in succession fast
# enough will only register the first key if both are pressed during the same frame, without the break
# a user can change direction twice in a frame, allowing the snake to make a 180turn in one frame.
break
# Draw objects
checker_board.draw()
fruit.draw()
snake.update() # move + draw
# I placed this outside of the Snake class, as it seemed to make more sense for it to be in the game loop
collided = snake.check_collision(fruit)
if collided:
game_over(score)
# This code is only run if player continues, it overwrites the old snake with a new snake:
snake = Snake(spawn_coord=snake_spawn_coord,
spawn_length=snake_spawn_length,
spawn_dir=snake_spawn_direction)
score = 0
elif collided == False: # Ignore the pep-8 violation, collided can also return None, and None == not True
# a new fruit
fruit = Fruit(snake)
score += 1
# Update the display
pg.display.flip()
clock.tick(target_fps)
def game_over(score):
cont = False # Whether or not the player wants to play again
s = pg.Surface(
(width * tilesize, height *
tilesize)) # Black background with an alpha making it translucent
s.fill(black)
s.set_alpha(100)
board.blit(s, (0, 0))
big_font = pg.font.SysFont("Arial", 40, bold=True)
font = pg.font.SysFont("Arial", 24)
game_over_text = big_font.render("Game Over!", True,
black) # Antialias=True, color=black
score_string = "Your score: " + str(score)
score_text = font.render(score_string, True, black)
continue_text = font.render("Press SPACE to try again or ESCAPE to quit.",
True, black)
board.blit(game_over_text, (20, height // 2 * tilesize - 45))
board.blit(score_text, (20, height // 2 * tilesize))
board.blit(continue_text, (20, height // 2 * tilesize + 26))
# Nested game loop
while True:
# Check for use input
for ev in pg.event.get(): # ev : event
if ev.type == QUIT:
pg.quit()
kill_everything()
elif ev.type == KEYDOWN:
k = ev.key
if k == K_ESCAPE:
pg.quit()
kill_everything()
elif k == K_SPACE:
cont = True
break
break
if cont:
break
# Update the display, this might aswell be high to give a more responsive feel
clock.tick(60)
pg.display.flip()