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import pygame
from pygame . sprite import Sprite
class Man ( Sprite ) :
def __init__ ( self , ai_settings , screen ) :
""" 初始化人，并设置其起始位置 """
super ( Man , self ) . __init__ ( )
self . screen = screen
self . ai_settings = ai_settings
# 加载人的图像，
self . image = pygame . image . load ( ' images/man.png ' )
self . rect = self . image . get_rect ( )
self . screen_rect = screen . get_rect ( )
# 在屏幕底部中央启动
self . rect . centerx = self . screen_rect . centerx
self . rect . bottom = self . screen_rect . bottom
# 存储人中心的十进制值
self . center = float ( self . rect . centerx )
# 运动
self . moving_right = False
self . moving_left = False
def center_man ( self ) :
""" 在窗口上使人居中 """
self . center = self . screen_rect . centerx
def update ( self ) :
""" 根据移动标志更新人位置 """
# 更新人的中心值，
if self . moving_right and self . rect . right < self . screen_rect . right :
self . center + = self . ai_settings . man_speed_factor
if self . moving_left and self . rect . left > 0 :
self . center - = self . ai_settings . man_speed_factor
# 从self.center更新rect对象
self . rect . centerx = self . center
def blitme ( self ) :
""" 在当前位置绘制人 """
self . screen . blit ( self . image , self . rect )
