笔记
import random
import pygame
SCREEN_RECT = pygame.Rect(0, 0, 480, 700)
FRAME_PER_SEC = 60
CREATE_ENEMY_EVENT = pygame.USEREVENT
HERO_FIRE_EVENT = pygame.USEREVENT + 1
class GameSprite(pygame.sprite.Sprite):
"""飞机游戏精灵"""
def __init__(self, image_name, speed=1):
super().__init__()
self.image = pygame.image.load(image_name)
self.rect = self.image.get_rect()
self.speed = speed
def update(self):
self.rect.y += self.speed
class Background(GameSprite):
"""游戏背景精灵"""
def __init__(self, is_alt=False):
super().__init__("./images/background.png")
if is_alt:
self.rect.y = -self.rect.height
def update(self):
super().update()
if self.rect.y >= SCREEN_RECT.height:
self.rect.y = -self.rect.height
class Enemy(GameSprite):
"""敌机精灵"""
def __init__(self):
super().__init__("./images/enemy1.png")
self.speed = random.randint(1, 3)
self.rect.bottom = 0
max_x = SCREEN_RECT.width - self.rect.width
self.rect.x = random.randint(0,max_x)
def update(self):
super().update()
if self.rect.y >= SCREEN_RECT.height:
self.kill()
def __del__(self):
pass
class Hero(GameSprite):
"""英雄精灵"""
def __init__(self):
super().__init__("./images/me1.png",0)
self.rect.centerx = SCREEN_RECT.centerx
self.rect.bottom = SCREEN_RECT.bottom - 120
self.bullets = pygame.sprite.Group()
def update(self):
self.rect.x += self.speed
if self.rect.x < 0:
self.rect.x = 0
elif self.rect.right > SCREEN_RECT.right:
self.rect.right = SCREEN_RECT.right
def fire(self):
print("发射子弹...")
for i in (0,1,2):
bullet = Bullet()
bullet.rect.bottom = self.rect.y - i * 20
bullet.rect.centerx = self.rect.centerx
self.bullets.add(bullet)
class Bullet(GameSprite):
"""子弹精灵"""
def __init__(self):
super().__init__("./images/bullet1.png",-2)
def update(self):
super().update()
if self.rect.bottom < 0:
self.kill()
def __del__(self):
print("子弹被销毁...")