2018-09-04小球运动

1，小球随机运动

import pygame
from random import randint
'''  '''
def draw_cirtle(x,y):
    pygame.draw.circle(window, ( 255,0,255),(x,y),20)
    pygame.display.update()


'''   '''
pygame.init()
window = pygame.display.set_mode((400, 600))
window.fill((255, 255, 255))

x=randint(20,580)
y=randint(20,580)
print(x,y)
a=randint(-3,3)
b=randint(-3,3)
add_x=a
add_y=b
# 游戏循环
while True:
    print(add_x,add_y)

    pygame.time.delay(10)
    # 将之前纸上的内容给覆盖
    window.fill((255, 255, 255))
    # 不断的画圆
    draw_cirtle(x,y)
    if (x+20)>=400:
        x=380
        add_x *= -1
    elif (x-20)<=0:
        x = 20
        add_x *= -1
    elif (y+20)==600:
        y=580
        add_y *= -1
    elif (y-20)<=0:
        y = 20
        add_y *= -1
    y+=add_y
    x+=add_x

    # 事件检测
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            exit()