50 lines
1.6 KiB
Python
50 lines
1.6 KiB
Python
import pygame
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from pygame.sprite import Sprite
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class Ship(Sprite):
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'''飞船所有信息'''
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def __init__(self, ai_settings, screen):
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"""初始化飞船，并设置其起始位置"""
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super(Ship, self).__init__()
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self.screen = screen
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self.ai_settings = ai_settings
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# 加载飞船图片、获取外接矩形
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self.image = pygame.image.load(self.ai_settings.ship_image_path) # 加载图片
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self.image = pygame.transform.smoothscale(self.image, (40, 60))
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self.rect = self.image.get_rect() # 获取图片外接矩形
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self.screen_rect = screen.get_rect() # 获取屏幕外接矩形
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# 将每搜新飞船放到并木底部中心
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self.rect.centerx = self.screen_rect.centerx
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self.rect.bottom = self.screen_rect.bottom
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# 设置成浮点类型
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self.center = float(self.rect.centerx) # self.rect.centerx设置不了浮点数 只能另设置一个变量进行运算
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# 移动标志
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self.moving_right = False
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self.moving_left = False
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def blitme(self):
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'''在指定位置绘制飞船'''
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self.screen.blit(self.image, self.rect)
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def update(self):
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# 向右移动飞船
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if self.moving_right and self.rect.right < self.screen_rect.right:
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self.center += self.ai_settings.ship_speed_factor
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# 向左移动飞船
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if self.moving_left and self.rect.left > self.screen_rect.left:
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self.center -= self.ai_settings.ship_speed_factor
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self.rect.centerx = self.center
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def center_ship(self):
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"""让飞船在屏幕上居中"""
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self.center = self.screen_rect.centerx |