本文实例为大家分享了pygame实现弹力球及其变速效果的具体代码，供大家参考，具体内容如下
期望：
1.球体接触到框体后反弹
2.设置速度按键，按下后改变球体速度、颜色状态
具体实现：
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import pygame
from pygame.locals import *
import sys, random
class Circle(object):
# 设置Circle类属性
def __init__(self):
self.vel_x = 1
self.vel_y = 1
self.radius = 20
self.pos_x, self.pos_y = random.randint(0, 255), random.randint(0, 255)
self.width = 0
self.color = 0, 0, 0
# 球体颜色速度改变方法
def change_circle(self, number):
self.color = random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)
# 防止球体速度方向发生改变
if self.vel_x < 0:
self.vel_x = -number
else:
self.vel_x = number
if self.vel_y < 0:
self.vel_y = -number
else:
self.vel_y = number
# self.vel_x, self.vel_y = number, number 如果仅此句，速度方向会发生改变
def circle_run(self):
# 防止球体超出游戏界面框体
if self.pos_x > 580 or self.pos_x < 20:
self.vel_x = -self.vel_x
if self.pos_y > 480 or self.pos_y < 20:
self.vel_y = -self.vel_y
self.pos_x += self.vel_x
self.pos_y += self.vel_y
pos = self.pos_x, self.pos_y
pygame.draw.circle(screen, self.color, pos, self.radius, self.width)
pygame.init()
screen = pygame.display.set_mode((600, 500))
# Circle实例
circle1 = Circle()
while True:
for event in pygame.event.get():
if event.type == QUIT:
sys.exit()
elif event.type == KEYUP:
if event.key == pygame.K_1:
circle1.change_circle(1)
elif event.key == pygame.K_2:
circle1.change_circle(2)
elif event.key == pygame.K_3:
circle1.change_circle(3)
elif event.key == pygame.K_4:
circle1.change_circle(4)
screen.fill((0, 0, 100))
circle1.circle_run()
pygame.display.update()
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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。