pygame:优化移动的小球

wokaoyan1981 2020-02-09 11:05:59

意图：让红色小球在蓝色背景上面随机移动。
问题：移动不流畅，而且好像只在左上-右下方向运动。

#1 ball.py

import pygame

from random import choice

from settings import Settings





class Ball():

    def __init__(self, screen):

        ai_settings = Settings()

        self.screen = screen



        self.image = pygame.image.load('images/ball.png')

        self.rect = self.image.get_rect()

        self.screen_rect = screen.get_rect()



        self.rect.centerx = self.screen_rect.centerx

        self.rect.centery = self.screen_rect.centery



        self.x_values = [ai_settings.screen_width/2]

        self.y_values = [ai_settings.screen_height/2]



    def blitme(self):

        self.screen.blit(self.image, self.rect)



    def fill_walk(self):

        x_direction = choice([1, -1])

        x_distance = choice([30, 40])

        x_step = x_direction * x_distance



        y_direction = choice([-1, 1])

        y_distance = choice([ 30, 40])

        y_step = y_direction * y_distance



        next_x = self.x_values[-1] + x_step

        next_y = self.y_values[-1] + y_step



        self.x_values.append(next_x)

        self.y_values.append(next_y)



    def update(self):

        self.rect.centerx = self.x_values[-1]

        self.rect.centery = self.x_values[-1]

#2 moving_ball.py



import pygame

import sys

from settings import Settings

from ball import Ball

import game_functions as gf





class MovingBall():





    def run_game(self):

        pygame.init()

        ai_settings = Settings()

        screen = pygame.display.set_mode((ai_settings.screen_width,

                                          ai_settings.screen_height))

        pygame.display.set_caption("Moving Ball")

        ball = Ball(screen)



        while True:

            gf.check_events()

            ball.fill_walk()

            ball.update()

            gf.update_screen(ai_settings, screen, ball)





moving_ball = MovingBall()

moving_ball.run_game()

#3 game_functions.py

import sys

import pygame



def check_events():

    for event in pygame.event.get():

        if event.type == pygame.QUIT:

            sys.exit()



def update_screen(ai_settings, screen, ball):

    screen.fill(ai_settings.bg_color)

    ball.blitme()

    pygame.display.flip()

#4 settings.py

class Settings():

    def __init__(self):

        self.screen_width = 1200

        self.screen_height = 800

        self.bg_color = (80, 166, 209)

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