Chapter 19

代码清单18-5

实现游戏碰撞，掉落，得分，生命，游戏结束的音效

import pygame, sys

class MyBallClass(pygame.sprite.Sprite):
    def __init__(self, image_file, speed, location):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.image.load(image_file)
        self.rect = self.image.get_rect()
        self.rect.left, self.rect.top = location
        self.speed = speed
        
    def move(self):
        global score,score_font, score_surf
        self.rect = self.rect.move(self.speed)
        if self.rect.left < 0 or self.rect.right > screen.get_width():
            self.speed[0] = -self.speed[0]
            hit_wall.play()

        if self.rect.top <=0:
            self.speed[1] = -self.speed[1]
            score = score + 1
            score_surf = score_font.render(str(score), 1,(0, 0 ,0))
            get_point.play()

class MyPaddleClass(pygame.sprite.Sprite):
    def __init__(self, location = [0,0]):
        pygame.sprite.Sprite.__init__(self)
        image_surface = pygame.surface.Surface([100, 20])
        image_surface.fill([0,0,0])
        
        self.image = image_surface.convert()
        self.rect = self.image.get_rect()
        self.rect.left, self.rect.top = location
pygame.init()
pygame.mixer.init()
hit = pygame.mixer.Sound("hit_paddle.wav")
hit.set_volume(0.4)
hit_wall = pygame.mixer.Sound("hit_wall.wav")
hit_wall.set_volume(0.4)
get_point = pygame.mixer.Sound("get_point.wav")
get_point.set_volume(0.2)
splat = pygame.mixer.Sound("splat.wav")
splat.set_volume(0.6)
new_life = pygame.mixer.Sound("new_life.wav")
new_life.set_volume(0.5)
bye = pygame.mixer.Sound("game_over.wav")
bye.set_volume(0.6)
screen = pygame.display.set_mode([640, 480])
clock = pygame.time.Clock()
ball_speed = [10, 5]
myBall = MyBallClass('wackyball.bmp', ball_speed, [50,50])
ballGroup = pygame.sprite.Group(myBall)
paddle = MyPaddleClass([270, 400])
lives = 3
score = 0
score_font = pygame.font.Font(None, 50)
score_surf = score_font.render(str(score), 1, (0,0,0))
score_pos = [10, 10]
done = False

running = True
while running:
    clock.tick(30)
    screen.fill([255, 255, 255])
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        elif event.type == pygame.MOUSEMOTION:
            paddle.rect.centerx = event.pos[0]

    if pygame.sprite.spritecollide(paddle,ballGroup,False):
        myBall.speed[1] = -myBall.speed[1]
    myBall.move()
    if not done:
        screen.blit(myBall.image,myBall.rect)
        screen.blit(paddle.image,paddle.rect)
        screen.blit(score_surf, score_pos)
        for i in range (lives):
            width = screen.get_width()
            screen.blit(myBall.image,[width - 40 * i ,20])
        pygame.display.flip()
        
    if myBall.rect.top >= screen.get_rect().bottom:
        splat.play()
        lives = lives - 1
        if lives == 0:
            final_text1 = "Game Over"
            final_text2 = "Your final score is: " + str(score)
            ft1_font = pageme.font.Font(None, 70)
            ft1_surf = ft1_font.render(final_text1, 1, (0, 0, 0))
            ft2_font = pygame.font.Font(None, 50)
            ft2_surf = ft2_font.render(final_text2, 1, (0, 0, 0))
            screen.blit(ft1_surf,(screen.get_width()/2 - \
                       ft1_surf.get_width/2, 100))
            screen.blit(ft2_surf,[screen.get_width()/2 - \
                        ft2_surf.get_width()/2, 200])
            pygame.display.flip()
            done = True
            bye.play()
        else:  #wait 2 seconds,then start the next ball
            pygame.time.delay(2000)
            myBall.rect.topleft = ([50, 50])
            new_life.play()
pygame.quit()