用pygame实现打飞机游戏-5-发射子弹

#coding=utf-8
import pygame
#导入pygame模块
from pygame.locals import *
#导入检测键盘的子模块
class AircraftCoordinate(object):
    def __init__(self,screen):
        #设置飞机默认的位置
        self.x = 250
        self.y = 600
        self.screen =screen
        #设置要显示的内容的窗口
        self.imagePath = "./feiji/hero.gif"
        self.aircraftImageFile = pygame.image.load(self.imagePath).convert()
        self.aircraftBullet = []
        #在默认值中定义一个aircraftBullet列表
    def display(self):
        self.screen.blit(self.aircraftImageFile,(self.x,self.y))

        for bullet in self.aircraftBullet:
            bullet.display()
            bullet.move()
        #无限显示子弹，即按空格就显示子弹
    def moveLeft(self):
        self.x -= 20
    def moveRight(self):
        self.x += 20
    def moveUp(self):
        self.y -= 20
    def moveDown(self):
        self.y += 20
    def shoot(self):
        newBullet = BulletCoordinate(self.x,self.y,self.screen)
        #定义一个newBullet变量，传x,y,screen到BulletCoordinate类中
        self.aircraftBullet.append(newBullet)
        #在aircraftBullet中创建新子弹
class BulletCoordinate(object):
     def __init__(self,x,y,screen):
         #定义默认值，接收从飞机类中传过来的参数
         self.x = x+40
         self.y = y-20
         self.screen = screen
         self.imagePath = "./feiji/bullet-3.gif"
         self.bulletImageFile = pygame.image.load(self.imagePath).convert()
     def move(self):
         self.y -= 0.5
     def display(self):
         self.screen.blit(self.bulletImageFile,(self.x,self.y))
     


if __name__ == '__main__':
#__name__变量，判断该模块是作为脚本被执行，还是被调用，当直接执行的时候，就是main，在被别人调用的时候，就是name
    screen = pygame.display.set_mode((480,980),0,32)
#设置屏幕，0,32是默认值
    bgImageFile = './feiji/background.png'
#导入图片
    background = pygame.image.load(bgImageFile).convert()
#背景用background保存
    aircraft = AircraftCoordinate(screen)
    #aircraftImageFile =  './feiji/hero.gif'
    #导入飞机图片
    #aircraft = pygame.image.load(aircraftImageFile).convert()
    #飞机图用aircraft保存

while True:
    screen.blit(background,(0,0))
    #设置背景在屏幕的坐标，0.0是左上角的坐标。
    #screen.blit(aircraft,(x,y))
    #设置飞机在屏幕的坐标

    aircraft.display()
    for event in pygame.event.get():
        #在发生的事件当中循环，意思可以等同于获取所有的键盘操作
        if event.type == QUIT:
            #判断是否是按下了关闭键
            print("exit")
            exit()
            #退出程序
        elif event.type ==KEYDOWN:
            #判断是否按下了按键
            if event.key == K_a or event.key == K_LEFT:
            #判断是否按下了a键或者左键
                print('左')
                aircraft.moveLeft()
            elif event.key == K_d or event.key == K_RIGHT:
            #判断是否按下了d键或者右键
                print('右')
                aircraft.moveRight()
            elif event.key == K_w or event.key == K_UP:
            #判断是否按下了w键或者上键
                print('上')
                aircraft.moveUp()
            elif event.key == K_s or event.key == K_DOWN:
            #判断是否按下了s键或者下键
                print('下')
                aircraft.moveDown()
            elif event.key == K_SPACE:
            #判断是否按下了空格键
                print('射子弹')
                aircraft.shoot()

    pygame.display.update()
    #更新屏幕