这部分是gamefunction.py文件

Question

这部分是gamefunction.py文件

import sys

import pygame

def check_keydown_events(event,ship):
    """Respond to the keypressess."""
    if event.key == pygame.K_RIGHT:
        ship.moving_right = True
    elif event.key == pygame.K_LEFT:
        ship.moving_left = True
    elif event.key == pygame.K_UP:
        ship.moving_up = True
    elif event.key == pygame.K_DOWN:
        ship.moving_down = True 


def check_keyup_events(event, ship):
    """Respond to the keyreleases."""
    if event.key == pygame.K_RIGHT:
        ship.moving_right = False
    elif event.key == pygame.K_LEFT:
        ship.moving_left = False
    elif event.key == pygame.K_UP:
        ship.moving_up = False
    elif event.key == pygame.K_DOWN:
        ship.moving_down = False

def check_events(ship):
    """Respond to keypresses and mouse events."""
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()

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

这名为ship.py

import pygame

class Ship():

    def __init__(self,ai_settings,screen):
        """Initialize the ship and set its starting position."""
        self.screen = screen
        self.ai_settings = ai_settings
        #Load the ship image and get its rect.
        self.image = pygame.image.load('images/ship.png')
        self.rect = self.image.get_rect()
        self.screen_rect = screen.get_rect()

        #Start each new ship at the bottom center of the screen.
        self.rect.centerx = self.screen_rect.centerx
        self.rect.bottom = self.screen_rect.bottom

        #Store a decimal value for the ship's center.
        self.center = float(self.rect.centerx) 
        #Movement Flags
        self.moving_right = False
        self.moving_left = False
        self.moving_up = False
        self.moving_down = False


    def update(self):
        """Update the ship's position based on the movement flag."""
        #Update the ship's center value, not the rect
        if self.moving_right and self.rect.right<self.screen_rect.right:
            self.center += self.ai_settings.ship_speed_factor
        if self.moving_left and self.rect.left>0:
            self.center -= self.ai_settings.ship_speed_factor 
        #Up-dwon motion added ***Please check the logic for 1200x800 screen*** 
        if self.moving_up and self.rect.top<self.screen_rect.top:
            self.center += self.ai_settings.ship_speed_factor
        if self.moving_down and self.rect.bottom>800:
            self.center -= self.ai_settings.ship_speed_factor

        #Update rect object from self.center.
        self.rect.centerx = self.center

Answer 1

来源：Python Crash Course

ship.py中只有几个推文：

在self.center = float(self.rect.centerx)下，添加self.bottom = float(self.rect.bottom)并更改：

if self.moving_up and self.rect.top<self.screen_rect.top:
    self.center += self.ai_settings.ship_speed_factor
if self.moving_down and self.rect.bottom>800:
    self.center -= self.ai_settings.ship_speed_factor

为：

if self.moving_up and self.rect.top<self.screen_rect.top:
    self.bottom -= self.ai_settings.ship_speed_factor
if self.moving_down and self.rect.bottom<800:
    self.bottom += self.ai_settings.ship_speed_factor

最后在self.rect.centerx = self.center下，添加self.rect.bottom = self.bottom。

这应该可以让你在游戏中上下起伏！

Answer 2

我发现这是一个问题，在这些功能中：

check_keydown_events
check_keyup_events
check_events

在每种情况下，您都在执行if-elif-elif-elif语句。这意味着当if语句为True时，elif语句将不会运行。

在您的情况下，如果按下左或右键，您将永远无法向上或向下移动。

您应该更改此代码，以便仅使用if-elif分别使用向上/向下和向左/向右移动。

这是一个（更正的）示例：

if event.key == pygame.K_RIGHT:
    ship.moving_right = True
elif event.key == pygame.K_LEFT:
    ship.moving_left = True
if event.key == pygame.K_UP:
    ship.moving_up = True
elif event.key == pygame.K_DOWN:
    ship.moving_down = True

如果您将每个if-elif-elif-elif语句更改为if-elif-if-elif，则会解决您的问题。

Answer 3

<强> Ship.py

def check_keydown_event(event, ship):
    """Respond to keypresses"""
    ....
    elif event.key == pygame.K_UP:
        ship.moving_up = True
    elif event.key == pygame.K_DOWN:
        ship.moving_down = True


def check_keyup_event(event, ship):
    ....
    elif event.key == pygame.K_UP:
        ship.moving_up = False
    elif event.key == pygame.K_DOWN:
        ship.moving_down = False

<强> game_function.py

    var zip = new JSZip();
    var count = 0;
    var zipFilename = "zipFilename.zip";
    var urls = [
    'http://image-url-1',
    'http://image-url-2',
    'http://image-url-3'
     ];

    urls.forEach(function(url){
    var filename = "filename";
   // loading a file and add it in a zip file
   JSZipUtils.getBinaryContent(url, function (err, data) {
     if(err) {
        throw err; // or handle the error
     }
     zip.file(filename, data, {binary:true});
     count++;
     if (count == urls.length) {
       var zipFile = zip.generate({type: "blob"});
       saveAs(zipFile, zipFilename);
     }
  });
});

Pygame船只运动Up＆amp;向下（左右工作）

这部分是gamefunction.py文件

这名为ship.py

3 个答案: