def __init__(self,
start_pos,
vel=[UNIT, 0],
unit_size=UNIT,
color='Gold',
images=None):
'''Constructor'''
if images is None:
self.images = dict([
(key, None) for key in
['head', 'neck', 'tail', 'straight', 'left', 'right']
])
else:
self.images = images
self.head = sprite.Sprite('head',
start_pos,
vel,
0, (unit_size, unit_size),
color,
draw_method=draw_head,
image=self.images['head'],
update_method=sprite.update_toroid)
self.neck = sprite.Sprite('neck',
start_pos,
vel,
self.head.rot, (unit_size, unit_size),
color,
image=self.images['neck'])
self.body = []
self.tail = None
self.size = (unit_size, unit_size)
self.color = color
self.controls = dict([('left', 1), ('right', -1)])
def new_food():
'''Put new food down'''
food_pos = rand_pos()
while snake.is_on(sprite.Sprite(pos=food_pos, size=[UNIT, UNIT])):
food_pos = rand_pos()
return sprite.Sprite('food',
food_pos, [0, 0],
0, [UNIT, UNIT],
FOOD_COLOR,
line_color=FOOD_COLOR,
draw_method=sprite.draw_circle,
image=images['food'])
def update(self):
'''Update the snakes position, try to eat food, and grow'''
new_seg = sprite.Sprite('seg',
self.head.pos, [0, 0],
self.head.rot,
self.size,
self.color,
image=self.images['straight'])
self.head.update((WIDTH, HEIGHT))
if self.neck.rot != self.head.rot:
if (self.head.rot - self.neck.rot) % 4 == 1:
new_seg.image = self.images['left']
else:
new_seg.image = self.images['right']
self.neck.rot = self.head.rot
self.neck.pos = self.head.pos
if self.eat_food():
self.body.append(new_seg)
else:
self.body.append(new_seg)
old_seg = self.body.pop(0)
if self.tail:
self.tail.pos = old_seg.pos
self.tail.rot = old_seg.rot
if self.tail is None and len(self.body) > 0:
self.tail = self.body.pop(0)
self.tail.name = 'tail'
self.tail.draw_method = draw_tail
#self.tail.image = None
self.tail.image = self.images['tail']
def make_brick(grid_pos, color):
'''Makes a brick'''
return sprite.Sprite(name=color,
pos=grid_to_continuous(grid_pos),
size=BRICK_SIZE,
color=simplegui.COLOR_PALETTE[color],
line_width=2,
image=images[color])
def new_paddle(paddle_pos, paddle_size=PADDLE_SIZE):
'''Makes a paddle'''
return sprite.Sprite(name='Paddle',
pos=paddle_pos,
size=paddle_size,
color=simplegui.COLOR_PALETTE['White'],
image=None,
update_method=sprite.update_stay_in_world)
def add_point_sprite(points, brick):
'''Adds a point sprite to the world'''
point_sprites.append(
sprite.Sprite(name=str(points),
pos=brick.pos,
vel=[0, 2],
size=brick.size,
color=brick.color,
life=30,
draw_method=sprite.draw_name))
def make_spare_ball(ball_number):
'''Adds a spare ball'''
return sprite.Sprite(
name='SpareBall',
pos=(SPARE_BALL_POS[0] + (ball_number + 1) * BALL_SIZE[0],
SPARE_BALL_POS[1]),
size=BALL_SIZE,
color=simplegui.COLOR_PALETTE['White'],
image=None,
draw_method=sprite.draw_circle)
def new_ball():
'''Returns a new ball'''
return sprite.Sprite(name='Ball',
pos=grid_to_continuous([
GRID_WIDTH / 2, GRID_HEIGHT -
(GRID_HEIGHT - NUM_ROWS - TOP_GAP) / 2
]),
vel=random_vel(ball_speed, [-45, -135]),
size=BALL_SIZE,
color=simplegui.COLOR_PALETTE['White'],
image=None,
draw_method=sprite.draw_circle,
update_method=sprite.update_bounce)
def new_game():
'''Resets the board'''
global brick_rows, paddle, ball, spare_balls, gutter, game_over, point_sprites, score, level
game_over = False
score = 0
level = 1
brick_rows = new_bricks()
ball = new_ball()
spare_balls = [make_spare_ball(i) for i in range(SPARE_BALLS)]
paddle = new_paddle(grid_to_continuous([GRID_WIDTH / 2, GRID_HEIGHT - 2]))
gutter = sprite.Sprite(pos=(WIDTH / 2, HEIGHT), size=(WIDTH, 2))
point_sprites = []
def new_cursor(pos):
'''Makes a new cursor'''
return sprite.Sprite('block',
pos,
size=(BLOCK_H, BLOCK_H),
image=images[cursor_color])