pygame里面外星人的移动问题

雷锤 · 发表于 2022-2-20 14:30:04

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就是运行之后外星人在左右移动接触到边框之后不会向下移动
下面第一个是我自己的

import sys
import pygame
from settings import Settings
from ship import Ship
from bullet import Bullet
from alien import Alien
class AlienInvasion:
"""管理游戏和行为的类"""
def __init__(self):
"""初始化并创建游戏资源。"""
pygame.init()
self.settings = Settings()
self.screen = pygame.display.set_mode((0,0),pygame.FULLSCREEN)
pygame.display.set_caption("AlienInvasion")
self.bg_color = (230,230,230)
self.ship= Ship(self)
self.bullets = pygame.sprite.Group()
self.aliens = pygame.sprite.Group()
self._create_fleet()
def run_game(self):
"""开始游戏的主循环"""
while True:
# 监视键盘和鼠标事件。
self._check_events()
self.ship.update()
self._update_bullets()
self._update_aliens()
self._update_screen()
def _check_events(self):
"""响应按键和鼠标事件"""
for event in pygame.event.get():
if event.type == pygame.QUIT:
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 _create_fleet(self):
"""创建外星人群"""
#创建一个外星人群。
#创建一个外星人并计算一行可容纳多少个外星人
#外星人间距为外星人宽度
alien = Alien(self)
alien_width, alien_height = alien.rect.size
available_space_x = self.settings.screen_width - (2*alien_width)
number_aliens_x = available_space_x // (2* alien_width)
#计算屏幕克容纳多少行外星人
ship_height = self.ship.rect.height
available_space_y = (self.settings.screen_height- (3 * alien_height) - ship_height)
number_rows = available_space_y // (2 * alien_height)
#创建外星人群
for row_number in range(number_rows):
for alien_number in range(number_aliens_x):
self._create_alien(alien_number,row_number)
def _fire_bullet(self):
"""创建一颗子弹，并将其加入编组bullets中。"""
if len(self.bullets) < self.settings.bullets_allowed:
new_bullet = Bullet(self)
self.bullets.add(new_bullet)
def _update_aliens(self):
"""更新外星人群中所有外星人的位置"""
self._check_fleet_edges()
self.aliens.update()
def _update_screen(self):
"""更新屏幕上的图像，并切换到新屏幕"""
self.screen.fill(self.bg_color)
self.ship.blitme()
for bullet in self.bullets.sprites():
bullet.draw_bullet()
self.aliens.draw(self.screen)
pygame.display.flip()
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_UP:
self.ship.moving_up = True
elif event.key == pygame.K_DOWN:
self.ship.moving_down = True
elif event.key == pygame.K_q:
pygame.quit()
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
elif event.key == pygame.K_UP:
self.ship.moving_up = False
elif event.key == pygame.K_DOWN:
self.ship.moving_down = False
def _update_bullets(self):
"""更新子弹的位置并删除消失的子弹"""
self.bullets.update()
#删除消失的子弹。
for bullet in self.bullets.copy():
if bullet.rect.bottom <=0:
self.bullets.remove(bullet)
print(len(self.bullets))
def _create_alien(self, alien_number, row_number):
"""创建一个外星人并放在当前行"""
alien = Alien(self)
alien_width, alien_height = alien.rect.size
alien.x = alien_width + 2*alien_width * alien_number
alien.rect.x = alien.x
alien.rect.y = alien.rect.height + 2 * alien.rect.height * row_number
self.aliens.add(alien)
def _check_fleet_edges(self):
"""有外星人到达边缘采取相应的措施"""
for alien in self.aliens.sprites():
if alien.check_edges():
self._change_fleet_direction()
break
def _change_fleet_direction(self):
"""将整群外星人下移，并改变它们的方向"""
for alien in self.aliens.sprites():
alien.rect.y += self.settings.fleet_drop_speed
self.settings.fleet_direction *= -1
if __name__ == '__main__':
#创建游戏实例并运行游戏。
ai = AlienInvasion()
ai.run_game()

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第二个是案例的

import sys
import pygame
from settings import Settings
from ship import Ship
from bullet import Bullet
from alien import Alien
class AlienInvasion:
"""Overall class to manage game assets and behavior."""
def __init__(self):
"""Initialize the game, and create game resources."""
pygame.init()
self.settings = Settings()
self.screen = pygame.display.set_mode((0, 0), pygame.FULLSCREEN)
self.settings.screen_width = self.screen.get_rect().width
self.settings.screen_height = self.screen.get_rect().height
pygame.display.set_caption("Alien Invasion")
self.ship = Ship(self)
self.bullets = pygame.sprite.Group()
self.aliens = pygame.sprite.Group()
self._create_fleet()
def run_game(self):
"""Start the main loop for the game."""
while True:
self._check_events()
self.ship.update()
self._update_bullets()
self._update_aliens()
self._update_screen()
def _check_events(self):
"""Respond to keypresses and mouse events."""
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):
"""Respond to keypresses."""
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_q:
sys.exit()
elif event.key == pygame.K_SPACE:
self._fire_bullet()
def _check_keyup_events(self, event):
"""Respond to key releases."""
if event.key == pygame.K_RIGHT:
self.ship.moving_right = False
elif event.key == pygame.K_LEFT:
self.ship.moving_left = False
def _fire_bullet(self):
"""Create a new bullet and add it to the bullets group."""
if len(self.bullets) < self.settings.bullets_allowed:
new_bullet = Bullet(self)
self.bullets.add(new_bullet)
def _update_bullets(self):
"""Update position of bullets and get rid of old bullets."""
# Update bullet positions.
self.bullets.update()
# Get rid of bullets that have disappeared.
for bullet in self.bullets.copy():
if bullet.rect.bottom <= 0:
self.bullets.remove(bullet)
def _update_aliens(self):
"""
Check if the fleet is at an edge,
then update the positions of all aliens in the fleet.
"""
self._check_fleet_edges()
self.aliens.update()
def _create_fleet(self):
"""Create the fleet of aliens."""
# Create an alien and find the number of aliens in a row.
# Spacing between each alien is equal to one alien width.
alien = Alien(self)
alien_width, alien_height = alien.rect.size
available_space_x = self.settings.screen_width - (2 * alien_width)
number_aliens_x = available_space_x // (2 * alien_width)
# Determine the number of rows of aliens that fit on the screen.
ship_height = self.ship.rect.height
available_space_y = (self.settings.screen_height -
(3 * alien_height) - ship_height)
number_rows = available_space_y // (2 * alien_height)
# Create the full fleet of aliens.
for row_number in range(number_rows):
for alien_number in range(number_aliens_x):
self._create_alien(alien_number, row_number)
def _create_alien(self, alien_number, row_number):
"""Create an alien and place it in the row."""
alien = Alien(self)
alien_width, alien_height = alien.rect.size
alien.x = alien_width + 2 * alien_width * alien_number
alien.rect.x = alien.x
alien.rect.y = alien.rect.height + 2 * alien.rect.height * row_number
self.aliens.add(alien)
def _check_fleet_edges(self):
"""Respond appropriately if any aliens have reached an edge."""
for alien in self.aliens.sprites():
if alien.check_edges():
self._change_fleet_direction()
break
def _change_fleet_direction(self):
"""Drop the entire fleet and change the fleet's direction."""
for alien in self.aliens.sprites():
alien.rect.y += self.settings.fleet_drop_speed
self.settings.fleet_direction *= -1
def _update_screen(self):
"""Update images on the screen, and flip to the new screen."""
self.screen.fill(self.settings.bg_color)
self.ship.blitme()
for bullet in self.bullets.sprites():
bullet.draw_bullet()
self.aliens.draw(self.screen)
pygame.display.flip()
if __name__ == '__main__':
# Make a game instance, and run the game.
ai = AlienInvasion()
ai.run_game()

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pygame里面外星人的移动问题

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