day15-pygame作业之移动的小球

简单实现

import pygame
import math
import random
if __name__ == '__main__':
    # 初始化pygame组件
    pygame.init()
    # 设置pygame的显示窗口尺寸
    screen = pygame.display.set_mode((1000, 600))
    # 初始小球圆心
    sumadd_m = 20
    sumadd_n = 20
    # 速度增加量
    add_m = 0
    add_n = 0
    while True:
        if sumadd_m > 980 or sumadd_m < 20 or sumadd_n > 580 or sumadd_n < 20:
            break
        else:
            screen.fill((255, 255, 255))
            pygame.draw.circle(screen, (0,0,0), (sumadd_m, sumadd_n),20, 0)
            # 刷新窗口
            pygame.display.flip()
            # 监测窗口事件
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    exit()
                elif event.type == pygame.KEYDOWN:
                    if event.key == pygame.K_RIGHT:
                        add_m = 2
                        add_n = 0
                    elif event.key == pygame.K_LEFT:
                        add_m = -2
                        add_n = 0
                    elif event.key == pygame.K_UP:
                        add_n = -2
                        add_m = 0
                    elif event.key == pygame.K_DOWN:
                        add_n = 2
                        add_m = 0
                # elif event.type == pygame.KEYUP:
                #     if event.key == pygame.K_RIGHT:
                #         add_m = 0
                #     elif event.key == pygame.K_LEFT:
                #         add_m = 0
                #     elif event.key == pygame.K_UP:
                #         add_n = 0
                #     elif event.key == pygame.K_DOWN:
                #         add_n = 0
            sumadd_m += add_m
            sumadd_n += add_n
            # pygame.time.wait(25) # 控制程序单次循环运行时间，作用使程序每次循环暂停10毫秒