Python 之 pygame 学习(播放声音和音效)

一、相关方法

1. pygame.mixer.Sound()：播放音效
   音频可以可以是 OGG 音频文件或者 WAV 音频文件
   
2. pygame.mixer.music：播放背景音乐
   

二、示例1：Music

import pygame
import sys
from pygame.locals import *

pygame.init()
pygame.mixer.init()

pygame.mixer.music.load("bg_music.wav") # 载入音乐
pygame.mixer.music.set_volume(0.2)# 设置音量为 0.2
pygame.mixer.music.play() # 播放音乐

dog_sound = pygame.mixer.Sound("dog.wav")
dog_sound.set_volume(0.2)
bird_sound = pygame.mixer.Sound("bird.wav")
bird_sound.set_volume(0.2)

bg_size = width,height = 300,200
screen = pygame.display.set_mode(bg_size)
pygame.display.set_caption("Music Demo")

pause = False

pause_imgae = pygame.image.load("pause.png").convert_alpha()
unpause_imgae = pygame.image.load("keep.png").convert_alpha()

pause_rect = pause_imgae.get_rect()

pause_rect.center = width // 2,height // 2

clock = pygame.time.Clock()

while True:
    for event in pygame.event.get():
        if event.type == QUIT:
            sys.exit()
        if event.type == MOUSEBUTTONDOWN:
            # button(1：左键；2：中间键；3：右键)
            if event.button == 1: #表示点击鼠标左键
                dog_sound.play()
            if event.button == 3: # 表示点击鼠标右键
                bird_sound.play()

        if event.type == KEYDOWN:
            if event.key == K_SPACE:
                pause = not pause
        screen.fill((255,255,255))

        if pause:
            screen.blit(pause_imgae,pause_rect)
        else:
            screen.blit(unpause_imgae,pause_rect)

        pygame.display.flip()
        clock.tick(30)

三、示例2：给摩擦小球游戏添加背景音乐和音效

import pygame
import sys
from pygame.locals import *
from random import *
# pygame.sprite.Sprite 代表游戏对象的简单基类
class Ball(pygame.sprite.Sprite):
    def __init__(self,image,position,speed,bg_size):
        # pygame.sprite.Sprite.__init__(self)
        super().__init__() # 注意 super 的格式
        self.image = pygame.image.load(image).convert_alpha()
        self.rect = self.image.get_rect()
        self.rect.left,self.rect.top = position
        self.speed = speed
        self.width,self.height = bg_size[0],bg_size[1]
        # 由于采用 collide_circle()方法检测圆的碰撞，所以需要设置 radius 属性
        self.radius = self.rect.width / 2
    def move(self):
        self.rect = self.rect.move(self.speed)
        # 这里要的效果是小球整个超出屏幕左侧的应对方案
        if self.rect.right < 0:
            self.rect.left = self.width
        elif self.rect.left > self.width:
            self.rect.right = 0
        elif self.rect.bottom <0:
            self.rect.top = self.height
        elif self.rect.top > self.height:
            self.rect.bottom = 0
def main():
    pygame.init()
    ball_image = "gray_ball.png"
    bg_image = "background.png"

    running = True
    # 添加背景音乐
    pygame.mixer.music.load("bg_music.wav")
    pygame.mixer.music.play()

    # 添加音效
    win_sound = pygame.mixer.Sound("dog.wav")
    loser_sound = pygame.mixer.Sound("loser.wav")
    laugh_sound = pygame.mixer.Sound("laugh.wav")
    hole_sound = pygame.mixer.Sound("hole.wav")

    # 音乐播放完毕，游戏结束
    Gameover = USEREVENT # 自定义一个用户事件
    pygame.mixer.music.set_endevent(Gameover)

    #根据背景图片设置游戏界面的尺寸
    bg_size = width,height = 1024,681
    screen = pygame.display.set_mode(bg_size)
    pygame.display.set_caption("Play the ball")
    background = pygame.image.load(bg_image).convert_alpha()
    # 用来存放小球对象的列表
    balls = []
    group = pygame.sprite.Group()

    # 创建五个小球，位置随机，速度随机
    for i in range(5):
        # 球的大小是 100 x 100 防止越出边界，所以要宽和高减 100 的范围以内
        position = randint(0,width-100),randint(0,height-100)
        speed = [randint(-10,10),randint(-10,10)]
        ball = Ball(ball_image,position,speed,bg_size)
        # 创建小球时需要检测，防止球与球之间发生重叠
        # while pygame.sprite.spritecollide(ball,group,False):
        while pygame.sprite.spritecollide(ball,group,False,pygame.sprite.collide_circle):
            # 若发生碰撞即有重叠，就重新分配位置
            ball.rect.left,ball.rect.top = randint(0,width-100),randint(0,height-100)
        balls.append(ball)
        # 新建一个球后，将其加入检测组中
        group.add(ball)

    clock = pygame.time.Clock() # 设置帧率

    while running:
        for event in pygame.event.get():
            if event.type == QUIT:
                sys.exit()
            elif event.type == Gameover:
                loser_sound.play()
                pygame.time.delay(2000)
                laugh_sound.play()
                running = False

        screen.blit(background,(0,0))

        for each in balls:
            each.move()
            screen.blit(each.image,each.rect)

        for each in group:
            # 检测组中每一个小球运动过程中是否发生碰撞
            # 先将其弹出，检测完后再加入
            group.remove(each)
            # 若发生碰撞，就运动方向改为相反方向
            if pygame.sprite.spritecollide(each,group,False,pygame.sprite.collide_circle):
                each.speed[0] = -each.speed[0]
                each.speed[1] = -each.speed[1]
            group.add(each)
        pygame.display.flip()
        clock.tick(30) #最高每秒不超过 30 次

if __name__ == '__main__':
    main()