import?pygameosmathtime
from?random?import?randintuniformrandom
from?pygame.locals?import?*

#define?the?screen?size
SCREEN_SIZE?=?（300300）

#define?enum?edge
EDGE_LEFT?=?1
EDGE_BOTTOM?=?2
EDGE_RIGHT?=?3
EDGE_TOP?=?4

def?load_image（folderPathname?colorkey=None）:
????“““?load?image?and?set?a?colorkey?for?it“““
????fullname?=?os.path.join（folderPath?name）
????try:
????????image?=?pygame.image.load（fullname）
????except?pygame.error?message:
????????print?‘Cannot?load?image:‘?fullname
????????raise?SystemExit?message
????
????image?=?image.convert（）
????if?colorkey?is?None:
????????colorkey?=?image.get_at（（00））
????????image.set_colorkey（colorkey?RLEACCEL）
????????
????return?image

def?wait_enter_pressed（keys）:
????“block?the?screen?to?wait?a?keyborad?event“
????while?True:
????????e?=?pygame.event.wait（）
????????if?e.type?==?KEYUP?and?e.key?in?keys:
????????????break
????????elif?e.type?==?QUIT:
????????????pygame.quit（）
????????????return

#
class?Jet（pygame.sprite.Sprite）:

????“““class?Jet?represents?a?plane?in?the?game“““
????
????def?__init__（selfimagesspeedpos）:
????????“““
????????images:jet?images
????????speed:?the?speed?of?jet
????????pos:?the?initial?position?of?jet
????????“““
????????pygame.sprite.Sprite.__init__（self）
????????self.speed?=?speed
????????self.direction?=?[00]
????????self.images?=?images
????????self.imageself.rect?=?images[0]images[0].get_rect（）
????????self.rect.center?=?pos

????def?update（self）:
????????“““?move?the?jet?and?update?the?screen“““
????????dxdy?=?self.direction
????????self.rect.move_ip（dx*self.speeddy*self.speed）
????????rect?=?self.rect
????????if?rect.left?????????????rect.left?=?0
????????elif?rect.right?>?SCREEN_SIZE[0]:
????????????rect.right?=?SCREEN_SIZE[0]

????????if?rect.top?????????????rect.top?=?0
????????elif?rect.bottom?>?SCREEN_SIZE[1]:
????????????rect.bottom?=?SCREEN_SIZE[1]

????def?change_direction（selfvertical=0horizontal=0）:
????????“““?change?the?jet‘s?direction“““
????????self.direction[0]self.direction[1]=?horizontalvertical
????????self.image?=?self.images[horizontal]
????
class?Pellet（pygame.sprite.Sprite）:
????“““?represent?the?bullet?in?game“““
????
????def?__init__（selfimagespeed）:
????????“““?a?pellet?use?a?1x2?matrix?to?move“““
????????pygame.sprite.Sprite.__init__（self）
????????self.image??self.rect?=?imageimage.get_rect（）
????????self.speed?=?speed
????????#init?the?initial?point?and?the?moving?matrix
????????self.rect.centerself.direction?=?self._generate_line（）

????????
????def?_generate_line（self）:
????????“““?generate?a?initial?point?and?a?moving?matrix（direction）“““
????????edge?=?randint（EDGE_LEFTEDGE_TOP）
????????start_x??start_y?=?00
????????if?edge?==?EDGE_LEFT:
????????????start_x?=?0
????????????start_y?=?randint（0SCREEN_SIZE[1]）
????????????dx??dy?=?uniform（0.51）uniform（-11）
????????elif?edge?==?EDGE_BOTTOM:
???

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????134??2010-06-18?15:24??play\images\ball.bmp

?????文件????????713??2010-06-18?16:49??play\images\jet.png

?????文件????????628??2010-06-18?16:49??play\images\jetleft.PNG

?????文件????????624??2010-06-18?16:49??play\images\jetright.PNG

?????文件???????8127??2010-07-22?16:39??play\main.py

?????目錄??????????0??2010-07-23?11:22??play\images

?????目錄??????????0??2010-07-23?11:22??play

-----------?---------??----------?-----??----

????????????????10226????????????????????7