-
Notifications
You must be signed in to change notification settings - Fork 0
/
alien.py
35 lines (31 loc) · 1.22 KB
/
alien.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
import pygame
from pygame.sprite import Sprite
class Alien(Sprite):
'''表示单个外星人的类'''
def __init__(self, ai_settings, screen):
'''初始化外星人并设置其初始位置'''
super(Alien, self).__init__()
self.screen = screen
self.ai_settings = ai_settings
#加载外星人图像,并设置rect属性
self.image = pygame.image.load('.\\images\\alien.bmp')
self.rect = self.image.get_rect()
#每个外星人最初都在屏幕左上角附近
self.rect.x = self.rect.width
self.rect.y = self.rect.height
#存储外星人的准确位置
self.x = float(self.rect.x)
def blitme(self):
'''在指定位置绘制外星人'''
self.screen.blit(self.image, self.rect)
def check_edges(self):
'''如果外星人位于屏幕边缘,返回True'''
screen_rect = self.screen.get_rect()
if self.rect.right >= screen_rect.right:
return True
elif self.rect.left <= 0:
return True
def update(self):
'''向右移动外星人'''
self.x += (self.ai_settings.alien_speed_factor * self.ai_settings.fleet_direction)
self.rect.x = self.x