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DiHASTRO
Asked:2020-07-22 23:29:53 +0000 UTC2020-07-22 23:29:53 +0000 UTC

蛇没有苹果。游戏。蟒蛇 3

  • 772

您好，代码如下：

import pygame
import random

win = pygame.display.set_mode((500, 500))

pygame.display.set_caption('Змейка')

clock = pygame.time.Clock()

x = 250
y = 250

appleWidth = 10
appleHeight = 10

width = 7
height = 7
speed = 7

direction = "right"

parts = []
apple = {}
snake = ''
isApple = False

def drawWindow():
    part = []
    win.fill((0, 0, 0))
    snake = pygame.draw.rect(win, (255, 0, 0), (x, y, width, height))
    part.append(snake)
    part.append(x)
    part.append(y)
    parts.append(part)
    pygame.display.update()

def move():
    global x, y

    if direction == 'right':
        x += speed
    elif direction == 'left':
        x -= speed
    elif direction == 'up':
        y -= speed
    elif direction == 'down':
        y += speed

    if x < 0:
        x = 500
    elif x > 500:
        x = 0
    if y < 0:
        y = 500
    elif y > 500:
        y = 0

def create_apple():
    global isApple 
    global apple

    xApple = random.randint(0, 500)
    yApple = random.randint(0, 500)
    for part in parts:
        if parts[part][1] == x and parts[part][2] == y:
            create_apple()
            break

    pygame.draw.rect(win, (0, 255, 0), (xApple, yApple, appleWidth, appleHeight))
    isApple = True
    apple['x'] = x
    apple['y'] = y

run = True
while run:
    pygame.time.delay(30)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

    if isApple == False:
        create_apple()

    keys = pygame.key.get_pressed()

    move()

    if direction == 'right' or direction == 'left':
        if keys[pygame.K_w]:
            direction = "up"
        elif keys[pygame.K_s]:
            direction = "down"
    else:
        if keys[pygame.K_a]:
            direction = "left"
        elif keys[pygame.K_d]:
            direction = "right"


    drawWindow()

底线是：这些是我创造一条蛇的尝试。我正在尝试通过 create_apple() 函数创建一个蛇苹果。我运行代码，但苹果没有出现。可能是什么问题呢？如何解决？

python-3.x

1 个回答

  1. Best Answer

    代码中的错误不止一个，所以我只是重写了要点：

    import pygame
import random

win = pygame.display.set_mode((500, 500))

pygame.display.set_caption('Змейка')

clock = pygame.time.Clock()

x = 250
y = 250

appleWidth = 10
appleHeight = 10

xApple = 0
yApple = 0

width = 7
height = 7
speed = 7

direction = "right"

parts = []
apple = {}
snake = ''
isApple = False

def drawWindow():
    try:
        a = pygame.draw.rect(win, (0, 0, 0), (parts[-1][1], parts[-1][2], width, height))
    except:
        pass

    part = []
    snake = pygame.draw.rect(win, (255, 0, 0), (x, y, width, height))
    part.append(snake)
    part.append(x)
    part.append(y)
    parts.append(part)
    pygame.display.update()

def move():
    global x, y

    if direction == 'right':
        x += speed
    elif direction == 'left':
        x -= speed
    elif direction == 'up':
        y -= speed
    elif direction == 'down':
        y += speed

    if x < 0:
        x = 500
    elif x > 500:
        x = 0
    if y < 0:
        y = 500
    elif y > 500:
        y = 0

def create_apple():
    global isApple, apple, win, xApple, yApple

    xApple = random.randint(0, 500)
    yApple = random.randint(0, 500)

    pygame.draw.rect(win, (0, 255, 0), (xApple, yApple, appleWidth, appleHeight))
    isApple = True
    apple['x'] = xApple
    apple['y'] = yApple

run = True
while run:
    pygame.time.delay(30)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

    if isApple == False:
        create_apple()

    keys = pygame.key.get_pressed()

    move()

    if direction == 'right' or direction == 'left':
        if keys[pygame.K_w]:
            direction = "up"
        elif keys[pygame.K_s]:
            direction = "down"
    else:
        if keys[pygame.K_a]:
            direction = "left"
        elif keys[pygame.K_d]:
            direction = "right"


    drawWindow()
    if abs(xApple - parts[-1][1]) < 7 and abs(yApple - parts[-1][2]) < 7:
        create_apple()

    让我们从绊脚石开始，这是行win.fill((0, 0, 0))。此功能在蛇每次移动前清屏，苹果也随之消失。为了解决这个问题，我将它更改为另一个函数，而不是完全清除它，而是绘制前一个蛇帧，但已经是黑色（该函数在尝试中被框起来，因为第一次访问数组时发生错误，前一帧还不存在）

    其次，现在苹果坐标是全局变量，这是必要的，这样吃苹果的检查在 body 中持续进行while run:，而不是在苹果创建函数本身中。检查本身查看蛇是否在距离苹果为 7 的圆内，如果是，则创建一个新苹果。我把删除旧苹果框架的功能留给了你，因为它与蛇的差别不大。

    否则，我看不到任何特殊问题（除了不准确地使用类似的 x 和 xApple 变量，因为你对它们感到困惑）

    • 2

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