Question

所以，我需要Pygame for Python 3.6的帮助。这是我参加编程课程的第一个学期，是的，这是我需要帮助的家庭作业。当我的雨滴是静止的时候，我的代码工作了，但是一旦我因为某种原因放入了移动，它现在只加载了一行。我需要一个雨滴网格向下移动屏幕并在每次底行从屏幕上消失时加载一个新行。是的，这可能比拥有所有这些模块更容易，但这就是本书想要完成的方式。这是我到目前为止所得到的： raindropgame.py

import sys
import pygame
from pygame.sprite import Group
from settings import Settings
from raindrop import Raindrop
import game_functions as gf

def run_game():
    # Initialize game and create a screen object.
    pygame.init()
    settings = Settings()
    screen = pygame.display.set_mode((settings.screen_width, 
settings.screen_height))
    pygame.display.set_caption("13-3")

    # Make raindrop group.
    raindrops = Group()

    # Create the raindrops.
    gf.create_raindrops(settings, screen, raindrops)

    # Start the main loop for the game.
    while True:

        gf.update_raindrops(raindrops)
        gf.update_screen(settings, screen, raindrops)

        # Watch for keyboard and mouse events.
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                sys.exit()

run_game()

settings.py

class Settings():
    """A class to store all settings."""

    def __init__(self):
        """Initialize the game's settings."""
        # Screen settings
        self.screen_width = 1200
        self.screen_height = 800
        self.bg_color = (0, 0, 255)

        # Raindrop settings
        self.raindrop_speed_factor = 1

game_functions.py

import sys
import pygame
from raindrop import Raindrop

def update_screen(settings, screen, raindrops):
    """Update images on the screen and flip to the new screen."""
    # Redraw the screen during each pass through the loop.
    screen.fill(settings.bg_color)
    raindrops.draw(screen)

    # Make the most recently drawn screen visible.
    pygame.display.flip()

def get_number_raindrops_x(settings, raindrop_width):
    """Determine the number of raindrops that fit in a row."""
    available_space_x = settings.screen_width - 2 * raindrop_width
    number_raindrops_x = int(available_space_x / (2 * raindrop_width))
    return number_raindrops_x

def get_number_rows(settings, raindrop_height):
    """Determine the number of rows of raindrops that fit on the screen."""
    available_space_y = settings.screen_height - (2 * raindrop_height)
    number_rows = int(available_space_y / (2 * raindrop_height))
    return number_rows

def create_raindrop(settings, screen, raindrops, raindrop_number, row_number):
    """Create a raindrop and place it in the row."""
    raindrop = Raindrop(settings, screen)
    raindrop_width = raindrop.rect.width
    raindrop.x = raindrop_width + 2 * raindrop_width * raindrop_number
    raindrop.rect.x = raindrop.x
    raindrop.rect.y = raindrop.rect.height + 2 * raindrop.rect.height * row_number
    raindrops.add(raindrop)

def create_raindrops(settings, screen, raindrops):
    """Create a full sky of raindrops."""
    # Create a raindrop and find the number of raindrops in a row.
    raindrop = Raindrop(settings, screen)
    number_raindrops_x = get_number_raindrops_x(settings, raindrop.rect.width)
    number_rows = get_number_rows(settings, raindrop.rect.height)

    # Create the full sky of raindrops.
    for row_number in range(number_rows):
        for raindrop_number in range(number_raindrops_x):
            create_raindrop(settings, screen, raindrops, raindrop_number, row_number)

def update_raindrops(raindrops):
    """Update the positions of all raindrops in sky."""
    raindrops.update()

raindrop.py

import pygame
from pygame.sprite import Sprite

class Raindrop(Sprite):
    """A class to represent a single raindrop in the sky."""

    def __init__(self, settings, screen):
        """Initialize the raindrop and set its starting position."""
        super(Raindrop, self).__init__()
        self.screen = screen
        self.settings = settings

        # Load the raindrop image and set its rect attribute.
        self.image = pygame.image.load('images/raindrop.png')
        self.rect = self.image.get_rect()

        # Start each new raindrop near the top left of the screen.
        self.rect.x = self.rect.width
        self.rect.y = self.rect.height

        self.y = float(self.rect.y)

    def update(self):
        """Move raindrop down."""
        self.y += self.settings.raindrop_speed_factor
        self.rect.y = self.y

    def blitme(self):
        """Draw the raindrop at its current location."""
        self.screen.blit(self.image, self.rect)

任何人都可以告诉我我做错了什么，也许如何让它在最后一行留下一个新行，因为我不知道。：/

Answer 1

在Raindrop.update()中，您必须检查位置并进行更改。

如果它在底部留下屏幕（self.rect.y >= setting,screen_height）
然后你必须把它移到顶部（self.rect.y = 0）。或者高于边界的事件。

def update(self):
    """Move raindrop down."""
    self.y += self.settings.raindrop_speed_factor

    # if it leaves bottom border
    if self.y >= self.settings.screen_height:
        # then put above top border
        self.y = -self.rect.height

    self.rect.y = self.y

我最好在顶行上方创建两行。一开始它们将在屏幕外，但是当你向下移动时，它们将在你将底行移到顶部之前填充顶行。

# Create the full sky of raindrops.
for row_number in range(-2, number_rows):

Answer 2

在create_raindrop()中，您需要更改：

raindrop.rect.y = raindrop.rect.height + 2 * raindrop.rect.height * row_number

为：

raindrop.y = raindrop.rect.height + 2 * raindrop.rect.height * row_number
raindrop.rect.y = raindrop.y

为什么这段代码没有制作雨滴网格？

2 个答案: