5
#import basic pygame modules
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from pygame.locals import *
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#see if we can load more than standard BMP
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if not pygame.image.get_extended():
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raise SystemExit, "Sorry, extended image module required"
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MAX_SHOTS = 2 #most player bullets onscreen
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ALIEN_ODDS = 22 #chances a new alien appears
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BOMB_ODDS = 60 #chances a new bomb will drop
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ALIEN_RELOAD = 12 #frames between new aliens
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SCREENRECT = Rect(0, 0, 640, 480)
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"loads an image, prepares it for play"
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file = os.path.join('data', file)
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surface = pygame.image.load(file)
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raise SystemExit, 'Could not load image "%s" %s'%(file, pygame.get_error())
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return surface.convert()
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def load_images(*files):
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return [load_image(file) for file in files]
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if not pygame.mixer: return dummysound()
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file = os.path.join('data', file)
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sound = pygame.mixer.Sound(file)
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print 'Warning, unable to load,', file
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# each type of game object gets an init and an
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# update function. the update function is called
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# once per frame, and it is when each object should
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# change it's current position and state. the Player
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# object actually gets a "move" function instead of
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# update, since it is passed extra information about
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class Player(pygame.sprite.Sprite):
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pygame.sprite.Sprite.__init__(self, self.containers)
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self.image = self.images[0]
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self.rect = self.image.get_rect()
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self.rect.centerx = SCREENRECT.centerx
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self.rect.bottom = SCREENRECT.bottom - 1
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self.origtop = self.rect.top
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def move(self, direction):
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if direction: self.facing = direction
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self.rect.move_ip(direction*self.speed, 0)
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self.rect = self.rect.clamp(SCREENRECT)
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self.image = self.images[0]
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self.image = self.images[1]
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self.rect.top = self.origtop - (self.rect.left/self.bounce%2)
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pos = self.facing*self.gun_offset + self.rect.centerx
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return pos, self.rect.top
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class Alien(pygame.sprite.Sprite):
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pygame.sprite.Sprite.__init__(self, self.containers)
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self.image = self.images[0]
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self.rect = self.image.get_rect()
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self.facing = random.choice((-1,1)) * Alien.speed
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self.rect.right = SCREENRECT.right
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self.rect.move_ip(self.facing, 0)
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if not SCREENRECT.contains(self.rect):
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self.facing = -self.facing;
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self.rect.top = self.rect.bottom + 1
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self.rect = self.rect.clamp(SCREENRECT)
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self.frame = self.frame + 1
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self.image = self.images[self.frame/self.animcycle%3]
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class Explosion(pygame.sprite.Sprite):
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def __init__(self, actor):
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pygame.sprite.Sprite.__init__(self, self.containers)
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self.image = self.images[0]
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self.rect = self.image.get_rect()
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self.life = self.defaultlife
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self.rect.center = actor.rect.center
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self.life = self.life - 1
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self.image = self.images[self.life/self.animcycle%2]
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if self.life <= 0: self.kill()
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class Shot(pygame.sprite.Sprite):
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def __init__(self, pos):
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pygame.sprite.Sprite.__init__(self, self.containers)
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self.image = self.images[0]
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self.rect = self.image.get_rect()
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self.rect.midbottom = pos
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self.rect.move_ip(0, self.speed)
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if self.rect.top <= 0:
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class Bomb(pygame.sprite.Sprite):
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def __init__(self, alien):
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pygame.sprite.Sprite.__init__(self, self.containers)
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self.image = self.images[0]
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self.rect = self.image.get_rect()
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self.rect.centerx = alien.rect.centerx
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self.rect.bottom = alien.rect.bottom + 5
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self.rect.move_ip(0, self.speed)
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if self.rect.bottom >= 470:
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class Score(pygame.sprite.Sprite):
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pygame.sprite.Sprite.__init__(self)
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self.font = pygame.font.Font(None, 20)
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self.font.set_italic(1)
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self.color = 255, 255, 255
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self.rect = self.image.get_rect().move(10, 450)
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if SCORE != self.lastscore:
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self.lastscore = SCORE
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msg = "Score: %d" % SCORE
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self.image = self.font.render(msg, 0, self.color)
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def main(winstyle = 0):
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if pygame.mixer and not pygame.mixer.get_init():
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print 'Warning, no sound'
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# Set the display mode
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winstyle = 0 # |FULLSCREEN
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bestdepth = pygame.display.mode_ok(SCREENRECT.size, winstyle, 32)
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screen = pygame.display.set_mode(SCREENRECT.size, winstyle, bestdepth)
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#Load images, assign to sprite classes
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#(do this before the classes are used, after screen setup)
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img = load_image('player1.gif')
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Player.images = [img, pygame.transform.flip(img, 1, 0)]
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img = load_image('explosion1.gif')
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Explosion.images = [img, pygame.transform.flip(img, 1, 1)]
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Alien.images = load_images('alien1.gif', 'alien2.gif', 'alien3.gif')
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Bomb.images = [load_image('bomb.gif')]
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Shot.images = [load_image('shot.gif')]
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#decorate the game window
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icon = pygame.transform.scale(Alien.images[0], (32, 32))
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pygame.display.set_icon(icon)
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pygame.display.set_caption('Pygame Aliens')
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pygame.mouse.set_visible(0)
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#create the background, tile the bgd image
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bgdtile = load_image('background.gif')
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background = pygame.Surface(SCREENRECT.size)
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for x in range(0, SCREENRECT.width, bgdtile.get_width()):
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background.blit(bgdtile, (x, 0))
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screen.blit(background, (0,0))
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pygame.display.flip()
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#load the sound effects
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boom_sound = load_sound('boom.wav')
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shoot_sound = load_sound('car_door.wav')
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music = os.path.join('data', 'house_lo.wav')
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pygame.mixer.music.load(music)
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pygame.mixer.music.play(-1)
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# Initialize Game Groups
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aliens = pygame.sprite.Group()
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shots = pygame.sprite.Group()
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bombs = pygame.sprite.Group()
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all = pygame.sprite.RenderUpdates()
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lastalien = pygame.sprite.GroupSingle()
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#assign default groups to each sprite class
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Player.containers = all
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Alien.containers = aliens, all, lastalien
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Shot.containers = shots, all
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Bomb.containers = bombs, all
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Explosion.containers = all
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Score.containers = all
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#Create Some Starting Values
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alienreload = ALIEN_RELOAD
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clock = pygame.time.Clock()
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#initialize our starting sprites
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Alien() #note, this 'lives' because it goes into a sprite group
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while player.alive():
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for event in pygame.event.get():
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if event.type == QUIT or \
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(event.type == KEYDOWN and event.key == K_ESCAPE):
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keystate = pygame.key.get_pressed()
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# clear/erase the last drawn sprites
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all.clear(screen, background)
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#update all the sprites
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direction = keystate[K_RIGHT] - keystate[K_LEFT]
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player.move(direction)
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firing = keystate[K_SPACE]
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if not player.reloading and firing and len(shots) < MAX_SHOTS:
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Shot(player.gunpos())
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player.reloading = firing
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elif not int(random.random() * ALIEN_ODDS):
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alienreload = ALIEN_RELOAD
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if lastalien and not int(random.random() * BOMB_ODDS):
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Bomb(lastalien.sprite)
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for alien in pygame.sprite.spritecollide(player, aliens, 1):
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for alien in pygame.sprite.groupcollide(shots, aliens, 1, 1).keys():
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for bomb in pygame.sprite.spritecollide(player, bombs, 1):
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dirty = all.draw(screen)
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pygame.display.update(dirty)
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pygame.mixer.music.fadeout(1000)
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pygame.time.wait(1000)
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#call the "main" function if running this script
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if __name__ == '__main__': main()
added
removed
examples/aliens.py
