python飞船项目_"import pygameclass ship():def _init_(self, ai_set

python编程基础项目（ 一）

1. 系统主程序

import sys
import pygame

from settings import Settings
from ship import Ship
import game_functions as gf
from pygame.sprite import Group

def run_game():
    """初始化pygame、设置和屏幕对象"""
    pygame.init()
    """初始化背景设置"""
    ai_settings = Settings()
    screen = pygame.display.set_mode((ai_settings.screen_width,ai_settings.screen_height))
    pygame.display.set_caption("Alien Invasion")

    """创建一艘飞船,必须在主循环前创建，以免以后每次循环都创建"""
    ship = Ship(ai_settings,screen)

    """创建一个用于存储子弹的编组"""
    bullets = Group()



    """开始游戏的主循环"""
    while True:
        """主循环检查玩家的输入"""
        gf.check_events(ai_settings,screen,ship,bullets)
        """更新飞船的位置"""
        ship.update()
        """未消失子弹的位置"""
        gf.update_bullets(bullets)
        """更新后的位置绘制新屏幕"""
        gf.update_screen(ai_settings,screen,ship,bullets)



run_game()

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
36
37
38
39

2. 功能主程序

import sys
import pygame
from bullet import Bullet


"""函数check_events()检测相关事件。辅助函数check_keydown_events()和
check_keyup_events()来处理这些事件。函数update_screen()，每次执行主循环时都重绘屏幕"""

def check_keydown_events(event,ai_settings,screen,ship,bullets):
    """响应案件"""
    if event.key == pygame.K_RIGHT:
        """按下按键时，将其设为True,实现左右移动"""
        ship.moving_right = True
    elif event.key == pygame.K_LEFT:
        ship.moving_left == True

    elif event.key == pygame.K_SPACE:
        fire_bullet(ai_settings, screen, ship,bullets)


   """创建一个子弹，并将加入到编组bullets中"""
    """如果子弹的数量大于3，俺空格时什么都不发生"""
def fire_bullet(ai_settings, screen, ship,bullets):
    if len(bullets) < ai_settings.bullets_allowed:
        new_bullet = Bullet(ai_settings, screen, ship)
        bullets.add(new_bullet)

def check_keyup_events(event,ship):
    """响应松开"""
    """松开右键时，将其设为False，实现左右移动"""
    if event.key == pygame.K_RIGHT:
        ship.moving_right = False
    elif event.key == pygame.K_LEFT:
        ship.moving_left = False

def check_events(ai_settings,screen,ship,bullets):
    """响应案件和鼠标事件"""
    """监视键盘和鼠标.一个事件循环以及管理屏幕更新的代码"""
    for event in pygame.event.get():
        """for循环用来监听事件"""
        if event.type == pygame.QUIT:
            sys.exit()

        elif event.type == pygame.KEYDOWN:
            check_keydown_events(event,ai_settings,screen,ship,bullets)

        elif event.type == pygame.KEYUP:
            check_keyup_events(event,ship)

def update_bullets(bullets):
    """更新子弹的位置，并删除已消失的子弹"""
    bullets.update()

    """删除已消失的子弹"""
    for bullet in bullets.copy():
        if bullet.rect.bottom <= 0:
            bullets.remove(bullet)
    print(len(bullets))


def update_screen(ai_settings,screen,ship,bullets):
    """使用screen.fill()填充屏幕"""
    screen.fill(ai_settings.bg_color)

    """在飞船和外星人后面重绘所有子弹,方法sprites()返回一个列表"""
    for bullet in bullets.sprites():
        bullet.draw_bullet()

    """调用ship.blitme()确保飞船出现在屏幕前"""
    ship.blitme()

    """让最近绘制的屏幕可见"""
    pygame.display.flip()


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
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75

3. 飞船程序

import pygame

class Ship():

    def __init__(self,ai_settings,screen):
        """初始化飞船并设置其初始位置"""
        self.ai_settings = ai_settings
        self.screen = screen

        self.image = pygame.image.load('images/ship.bmp')
        """加载飞船图像并获取其外接矩形"""

        self.rect = self.image.get_rect()
        """返回一个表示飞船的surface，并存储在self.image"""

        self.screen_rect = screen.get_rect()
        """将表示屏幕的矩形存储在self.screen_rect中"""

        self.rect.centerx = self.screen_rect.centerx
        """飞船中心的x坐标设置为表示矩形属性的centerx"""

        self.rect.bottom = self.screen_rect.bottom
        """将每艘新飞船放在底部中央"""

        self.center = float(self.rect.centerx)
        """飞船的属性center中存储小数值"""


        self.moving_right = False
        self.moving_left = False
        """移动标志位,左右移动"""


    def update(self):
        """根据移动标志调整飞船的位置（更新飞船的center值，而不是rect)"""
        """右边缘的坐标小于屏幕右边缘"""
        if self.moving_right and self.rect.right < self.screen_rect.right:
            self.center += self.ai_settings.ship_speed_factor

        """左边缘大于0说明未触及屏幕左边缘"""
        if self.moving_left and self.rect.left > 0:
            self.center -= self.ai_settings.ship_speed_factor


        self.rect.centerx = self.center
        """根据self.center更新rect对象"""


    def blitme(self):
        """在指定位置绘制飞船"""
        self.screen.blit(self.image,self.rect)


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
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53

4. 基础设置

class Settings():
    """存储外星人所有设置的类"""
    def __init__(self):
        """初始化游戏外观设置和速度"""
        #屏幕设置
        self.screen_width = 1000
        self.screen_height = 800
        self.bg_color = (230,230,230)
        """飞船的速度设置,每次移动1.5像素"""
        self.ship_speed_factor = 1.5

        """子弹设置"""
        self.bullet_speed_factor = 1
        self.bullet_width = 3
        self.bullet_height = 15
        self.bullet_color = 60,60,60
        """默认保留三颗子弹"""
        self.bullets_allowed = 3

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20