python3中pygame的显示问题

编程问答 2022-06-02

问题描述

This is the output of my code. I can't figure out how to fix this issue. 这段代码在使用 Pygame 创建的窗口中显示了奇怪的线条。 我正在学习如何在 Pygame 中使用箭头键，但并没有摆脱窗口中的这个小故障。 我所做更改的代码在 geeks for geeks 上：https://www.geeksforgeeks.org/python-drawing-design-using-arrow-keys-in-pygame/ 这工作得很好，但是当我使用不同大小的窗口和不同的形状来绘制时，它会在窗口中显示奇怪的线条。

import pygame
import tkinter

pygame.init()

# create the display surfce object of specific dimensions (1000x1000).
win = pygame.display.set_mode((500,500))

# Setting the window name
pygame.display.set_caption("Dungen World")

# Current coordinates
x = 250
y = 250

# dimensions of the player
width = 10
height = 10

# Speed of movement
vel = 2.5

# Indicator that pygame is running
running = True

# Main game loop
while running:
    # Time delay(milliseconds)
    pygame.time.delay(10)

    # Iterate over the list of event objects
    # that was returned by the pygame.event.get()
    for event in pygame.event.get():

        # if event object type is QUIT
        # then quitting the pygame
        # and program both
        if event.type == pygame.QUIT:
            # This will exit the while loop
            running = False

    # Stores the key pressed
    keys = pygame.key.get_pressed()

    # If left arrow key is pressed
    if keys[pygame.K_LEFT] and x > 5:
        # Decrement in x coordinates
        x -= vel

    # If left arrow key is pressed
    if keys[pygame.K_RIGHT] and x < 500 - width:
        # Decrement in x coordinates
        x += vel

    # If left arrow key is pressed
    if keys[pygame.K_UP] and y > 5:
        # Decrement in x coordinates
        y -= vel

    # If left arrow key is pressed
    if keys[pygame.K_DOWN] and y < 500 - height:
        # Decrement in x coordinates
        y += vel

    # drawing the square on screen
    pygame.draw.circle(win,(255,255,255),(x,y),width/2)

    # To refresh the window
    pygame.display.update()

# Closes the pygame window
pygame.quit()

解决方法

在游戏循环开始时添加 win.fill((0,0))（或您想要的任何背景颜色）。出于某种原因，如果背景没有颜色，macOS 会吓坏。

您的代码应如下所示：

import pygame
import tkinter

pygame.init()

# create the display surfce object of specific dimensions (1000x1000).
win = pygame.display.set_mode((500,500))

# Setting the window name
pygame.display.set_caption("Dungen World")

# Current coordinates
x = 250
y = 250

# dimensions of the player
width = 10
height = 10

# Speed of movement
vel = 2.5

# Indicator that pygame is running
running = True

# Main game loop
while running:
    # Time delay(milliseconds)
    pygame.time.delay(10)

    # Fill entire window with black
    win.fill((0,0))

    # Iterate over the list of event objects
    # that was returned by the pygame.event.get()
    for event in pygame.event.get():

        # if event object type is QUIT
        # then quitting the pygame
        # and program both
        if event.type == pygame.QUIT:
            # This will exit the while loop
            running = False

    # Stores the key pressed
    keys = pygame.key.get_pressed()

    # If left arrow key is pressed
    if keys[pygame.K_LEFT] and x > 5:
        # Decrement in x coordinates
        x -= vel

    # If left arrow key is pressed
    if keys[pygame.K_RIGHT] and x < 500 - width:
        # Decrement in x coordinates
        x += vel

    # If left arrow key is pressed
    if keys[pygame.K_UP] and y > 5:
        # Decrement in x coordinates
        y -= vel

    # If left arrow key is pressed
    if keys[pygame.K_DOWN] and y < 500 - height:
        # Decrement in x coordinates
        y += vel

    # drawing the square on screen
    pygame.draw.circle(win,(255,255,255),(x,y),width/2)

    # To refresh the window
    pygame.display.update()

# Closes the pygame window
pygame.quit()

编辑： 如果没有这段代码，玩家实际上并不会“移动”，而是更像是一个绘图应用而不是游戏。

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