Pygame Sprite模块
任何在我们的游戏窗口中绘制的、可以移动的位图都被称为Sprite。pygame.sprite模块包含了游戏开发中有用的类和功能。除了创建精灵对象集合的Sprite类之外,还有一些函数可以实现精灵对象的碰撞。
Sprite类作为游戏中不同对象的基类。你可能需要把一个更多的对象放在组中。为此,也提供了组类。
让我们首先通过子类化 sprite.Sprite 类来开发一个 Sprite 类。这个Block类的每个对象都是一个充满黑色的矩形块。
class Block(pygame.sprite.Sprite):
def __init__(self, color, width, height):
super().__init__()
self.image = pygame.Surface([width, height])
self.image.fill(color)
self.rect = self.image.get_rect()
我们将创建50个块状对象,并把它们放在一个列表中。
for i in range(50):
block = Block(BLACK, 20, 15)
# Set a random location for the block
block.rect.x = random.randrange(screen_width)
block.rect.y = random.randrange(screen_height)
# Add the block to the list of objects
block_list.add(block)
all_sprites_list.add(block)
我们创建一个红色的区块,称为播放器,并把它也添加到列表中。
# Create a RED player block
player = Block(RED, 20, 15)
all_sprites_list.add(player)
在游戏的事件循环中,检测红色块(玩家)随着鼠标的移动与黑色块的碰撞,并计算碰撞次数。
例子
事件循环的代码如下
while not done:
for event in pygame.event.get():
if event.type == pygame.QUIT:
done = True
# Clear the screen
screen.fill(WHITE)
# Get the current mouse position. This returns the position
# as a list of two numbers.
pos = pygame.mouse.get_pos()
# Fetch the x and y out of the list,
# just like we'd fetch letters out of a string.
# Set the player object to the mouse location
player.rect.x = pos[0]
player.rect.y = pos[1]
# See if the player block has collided with anything.
blocks_hit_list = pygame.sprite.spritecollide(player, block_list, True)
# Check the list of collisions.
for block in blocks_hit_list:
score += 1
print(score)
# Draw all the spites
all_sprites_list.draw(screen)
# Go ahead and update the screen with what we've drawn.
pygame.display.flip()
# Limit to 60 frames per second
clock.tick(60)
pygame.quit()
输出
运行上述代码。移动玩家块来捕捉尽可能多的黑色块。分数将在控制台中显示出来。