为什么改了子弹长度参数 可子弹长度还是不变??

子弹长度调整不了
目前只完成一些
但飞船子弹完成了

船类import pygame

class Ship:
    '''管理飞船的类'''
    def __init__(self,ai_game):
      '''初始化飞船并设置其初始位置'''
      self.screen = ai_game.screen
      self.settings = ai_game.settings
      self.screen_rect = ai_game.screen.get_rect()

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

      #将飞船放到屏幕中间
      self.rect.midbottom = self.screen_rect.midbottom

      #在飞船的属性x中储存一个浮点数
      self.x = float(self.rect.x)

      # 移动标志(一开始不动)
      self.moving_right = False
      self.moving_left = False
    def update(self):
        '''调整飞船位置'''

        if self.moving_right and self.rect.right < self.screen_rect.right:
            self.x += self.settings.ship_speed
        if self.moving_left and self.rect.left > 0:
            self.x -= self.settings.ship_speed
        self.rect.x = self.x

    def blitme(self):
      '''在特定的位置显示飞船'''
      self.screen.blit(self.image,self.rect)

设置类
class Settings:
    '''存储游戏设置的类'''
    def __init__(self):
        '''初始化游戏的设置'''
        # 屏幕设置
        self.screen_width = 1200
        self.screen_height = 800
        self.bg_color = (230, 230, 230)
        #飞船的设置
        self.ship_speed = 2
        #子弹设置
        self.bullet_speed = 3.0
        self.bullet_height = 1
        self.bullet_width = 3
        self.bullet_color = (60, 60, 60)
        self.bullets_allowed = 10
总类
import pygame

import sys
from settings import Settings

from ship import Ship
from bullet import Bullet
class AlienInvasion:
    '''管理游戏资源和行为的类'''
    def __init__(self):
        """初始化游戏并创建游戏资源"""
        pygame.init()
        self.clock = pygame.time.Clock()
        self.settings = Settings()

        self.screen = pygame.display.set_mode(
            (self.settings.screen_width,self.settings.screen_height))

        self.scree = pygame.display.set_mode((1200,800))
        pygame.display.set_caption("Alien Invasion")

        self.ship = Ship(self)
        self.bullets = pygame.sprite.Group()

        # 设置背景色
        self.bg_color = (26,160,75)

    def run_game(self):
        '''开始游戏的主循环'''
        while True:
            self._check_events()
            self.ship.update()
            self.bullets.update()

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

            self._update_screen()
            self.clock.tick(65)
            # 看键盘和鼠标指示
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    sys.exit()
            # 每次循环时都重绘屏幕
            self.screen.fill(self.settings.bg_color)
            self.ship.blitme()
            # 让玩家看见东西
            pygame.display.flip()

    def _check_events(self):
        '''响应按键和鼠标'''
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                sys.exit()
            elif event.type == pygame.KEYDOWN:
                self._check_keydown_events(event)
            elif event.type == pygame.KEYUP:
                self._check_keyup_events(event)
    def _check_keydown_events(self,event):
        if event.key == pygame.K_RIGHT:
            self.ship.moving_right = True
        elif event.key == pygame.K_LEFT:
            self.ship.moving_left = True
        elif event.key == pygame.K_0:
            sys.exit()
        elif event.key == pygame.K_SPACE:
            self._fire_bullet()

    def _check_keyup_events(self,event):
        if event.key == pygame.K_RIGHT:
            self.ship.moving_right = False
        elif event.key == pygame.K_LEFT:
            self.ship.moving_left = False
    def _update_screen(self):
        '''更新图像'''
        self.screen.fill(self.settings.bg_color)
        for bullet in self.bullets.sprites():
            bullet.draw_bullet()
        self.ship.blitme()

        pygame.display.flip()

    def _fire_bullet(self):
        '''创建一个子弹,并加入编组bullets'''
        if len(self.bullets) < self.settings.bullets_allowed:
            new_bullet = Bullet(self)
            self.bullets.add(new_bullet)


if __name__ == '__main__':
    # 创建游戏示例进行游戏
    ai = AlienInvasion()
    ai.run_game()

子弹类
import pygame
from pygame.sprite import Sprite

class Bullet (Sprite):
    '''管理飞船子弹的类'''

    def __init__(self,ai_game):
        '''在飞船面前创建一个子弹'''
        super().__init__()
        self.screen = ai_game.screen
        self.settings = ai_game.settings
        self.color = self.settings.bullet_color

        #在(0,0)处创建一个子弹矩形,再设置正确的位置
        self.rect = pygame.Rect(0,0,self.settings.bullet_width,self.settings.screen_height)
        self.rect.midtop = ai_game.ship.rect.midtop
        #存储浮点数表示的子弹位置
        self.y = float(self.rect.y)
    def update(self):
        '''向上移动子弹'''
        #更新子弹的准确位置
        self.y -= self.settings.bullet_speed
        self.rect.y = self.y

    def draw_bullet(self):
        '''在屏幕上绘制子弹'''
        pygame.draw.rect(self.screen,self.color,self.rect)

具体情况请看
https://www.bilibili.com/video/BV1nMYCeAEo3?t=3.6

新情况
https://www.bilibili.com/video/BV1wMe7ewEho?t=10.4

修改了参数还是不行
把子弹长度改成0还是很长

阅读 1.3k
2 个回答
#在(0,0)处创建一个子弹矩形,再设置正确的位置
self.rect = pygame.Rect(0,0,self.settings.bullet_width,self.settings.screen_height)
                                                                        ^
                                                                应该是bullet_height

你的代码有点问题,建议自己通过删减代码等方式,控制变量法来找问题。

import sys

import pygame
from pygame.sprite import Sprite


class Settings:
    """存储游戏设置的类"""

    def __init__(self):
        """初始化游戏的设置"""
        # 屏幕设置
        self.screen_width = 800
        self.screen_height = 600
        self.bg_color = (230, 230, 230)
        # 飞船的设置
        self.ship_speed = 2
        # 子弹设置
        self.bullet_speed = 3.0
        self.bullet_height = 1
        self.bullet_width = 3
        self.bullet_color = (60, 60, 60)
        self.bullets_allowed = 10


class Ship:
    """管理飞船的类"""

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

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

        # 将飞船放到屏幕中间
        self.rect.midbottom = self.screen_rect.midbottom

        # 在飞船的属性x中储存一个浮点数
        self.x = float(self.rect.x)

        # 移动标志(一开始不动)
        self.moving_right = False
        self.moving_left = False

    def update(self):
        """调整飞船位置"""

        if self.moving_right and self.rect.right < self.screen_rect.right:
            self.x += self.settings.ship_speed
        if self.moving_left and self.rect.left > 0:
            self.x -= self.settings.ship_speed
        self.rect.x = self.x

    def blitme(self):
        """在特定的位置显示飞船"""
        # self.screen.blit(self.image, self.rect)
        pass


class Bullet(Sprite):
    """管理飞船子弹的类"""

    def __init__(self, ai_game):
        """在飞船面前创建一个子弹"""
        super().__init__()
        self.screen = ai_game.screen
        self.settings = ai_game.settings
        self.color = self.settings.bullet_color

        # 在(0,0)处创建一个子弹矩形,再设置正确的位置
        self.rect = pygame.Rect(0, 0, self.settings.bullet_width, self.settings.bullet_height)
        self.rect.midtop = ai_game.ship.rect.midtop
        # 存储浮点数表示的子弹位置
        self.y = float(self.rect.y)

    def update(self):
        """向上移动子弹"""
        # 更新子弹的准确位置
        self.y -= self.settings.bullet_speed
        self.rect.y = self.y

    def draw_bullet(self):
        """在屏幕上绘制子弹"""
        pygame.draw.rect(self.screen, self.color, self.rect)


class AlienInvasion:
    """管理游戏资源和行为的类"""

    def __init__(self):
        """初始化游戏并创建游戏资源"""
        pygame.init()
        self.clock = pygame.time.Clock()
        self.settings = Settings()

        self.screen = pygame.display.set_mode((self.settings.screen_width, self.settings.screen_height))

        pygame.display.set_caption("Alien Invasion")

        self.ship = Ship(self)
        self.bullets = pygame.sprite.Group()

        # 设置背景色
        self.bg_color = self.settings.bg_color

    def run_game(self):
        """开始游戏的主循环"""
        while True:
            self._check_events()
            self.ship.update()
            self.bullets.update()

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

            self._update_screen()
            self.clock.tick(65)
            # # 每次循环时都重绘屏幕
            self.screen.fill(self.settings.bg_color)
            self.ship.blitme()
            # 让玩家看见东西
            pygame.display.flip()

    def _check_events(self):
        """响应按键和鼠标"""
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                sys.exit()
            elif event.type == pygame.KEYDOWN:
                self._check_keydown_events(event)
            elif event.type == pygame.KEYUP:
                self._check_keyup_events(event)

    def _check_keydown_events(self, event):
        if event.key == pygame.K_RIGHT:
            self.ship.moving_right = True
        elif event.key == pygame.K_LEFT:
            self.ship.moving_left = True
        elif event.key == pygame.K_0:
            sys.exit()
        elif event.key == pygame.K_SPACE:
            self._fire_bullet()

    def _check_keyup_events(self, event):
        if event.key == pygame.K_RIGHT:
            self.ship.moving_right = False
        elif event.key == pygame.K_LEFT:
            self.ship.moving_left = False

    def _update_screen(self):
        """更新图像"""
        self.screen.fill(self.settings.bg_color)
        for bullet in self.bullets.sprites():
            bullet.draw_bullet()
        self.ship.blitme()

        pygame.display.flip()

    def _fire_bullet(self):
        """创建一个子弹,并加入编组bullets"""
        if len(self.bullets) < self.settings.bullets_allowed:
            new_bullet = Bullet(self)
            self.bullets.add(new_bullet)


if __name__ == '__main__':
    # 创建游戏示例进行游戏
    ai = AlienInvasion()
    ai.run_game()
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