我正在为我的大学作业创建一个基本的蛇游戏项目,我需要一些帮助来理解我在这里做错了什么。
import pygame
import random
# --- Globals ---
# Colors
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)
RED = (255, 0, 0)
GREEN = (0, 255, 0)
# Screen size
height = 600
width = 600
# Margin between each segment
segment_margin = 3
# Set the width and height of each snake segment
segment_width = min(height, width) / 40 - segment_margin
segment_height = min(height, width) / 40 - segment_margin
# Set initial speed
x_change = segment_width + segment_margin
y_change = 0
class Snake():
""" Class to represent one snake. """
# Constructor
def __init__(self):
self.segments = []
self.spriteslist = pygame.sprite.Group()
for i in range(15):
x = (segment_width + segment_margin) * 30 - (segment_width + segment_margin) * i
y = (segment_height + segment_margin) * 2
segment = Segment(x, y)
self.segments.append(segment)
self.spriteslist.add(segment)
def move(self):
# Figure out where new segment will be
x = self.segments[0].rect.x + x_change
y = self.segments[0].rect.y + y_change
# Don't move off the screen
# At the moment a potential move off the screen means nothing happens, but it should end the game
if 0 <= x <= width - segment_width and 0 <= y <= height - segment_height:
# Insert new segment into the list
segment = Segment(x, y)
self.segments.insert(0, segment)
self.spriteslist.add(segment)
# Get rid of last segment of the snake
# .pop() command removes last item in list
old_segment = self.segments.pop()
self.spriteslist.remove(old_segment)
else:
return
self.eat()
def eat(self):
hit_list = pygame.sprite.spritecollide(self.segments[0], Food().foodlist, True)
if len(hit_list) == 1:
food.foodlists.pop(0)
food.foodlist.empty()
self.grow()
elif len(food.foodlists) == 0:
Food().replenish()
def grow(self):
x = self.segments[0].rect.x + x_change
y = self.segments[0].rect.y + y_change
segment = Segment(x, y)
self.segments.insert(len(self.segments), segment)
self.spriteslist.add(segment)
class Segment(pygame.sprite.Sprite):
""" Class to represent one segment of a snake. """
# Constructor
def __init__(self, x, y):
# Call the parent's constructor
super().__init__()
# Set height, width
self.image = pygame.Surface([segment_width, segment_height])
self.image.fill(WHITE)
# Set top-left corner of the bounding rectangle to be the passed-in location.
self.rect = self.image.get_rect()
self.rect.x = x
self.rect.y = y
foodx = random.choice([i for i in range(0, 600, 15)])
foody = random.choice([i for i in range(0, 600, 15)])
class Food():
def __init__(self):
self.foodlists = []
self.foodlist = pygame.sprite.Group()
fooditem = Food_item(foodx, foody)
self.foodlists.append(fooditem)
self.foodlist.add(fooditem)
def replenish(self):
newfoodx = random.choice([i for i in range(0, 600, 15)])
newfoody = random.choice([i for i in range(0, 600, 15)])
fooditem = Food_item(newfoodx, newfoody)
self.foodlists.append(fooditem)
self.foodlist.add(fooditem)
class Food_item(pygame.sprite.Sprite):
def __init__(self, fx, fy):
# Call the parent's constructor
super().__init__()
# Set height, width
self.image = pygame.Surface([segment_width, segment_height])
self.image.fill(RED)
# Set top-left corner of the bounding rectangle to be the passed-in location.
self.rect = self.image.get_rect()
self.rect.x = fx
self.rect.y = fy
# Call this function so the Pygame library can initialize itself
pygame.init()
# Create a 600x600 sized screen
screen = pygame.display.set_mode([width, height])
# Set the title of the window
pygame.display.set_caption('Snake Game')
# Create an initial snake
my_snake = Snake()
food = Food()
clock = pygame.time.Clock()
done = False
while not done:
for event in pygame.event.get():
if event.type == pygame.QUIT:
done = True
# Set the direction based on the key pressed
# We want the speed to be enough that we move a full
# segment, plus the margin.
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
x_change = (segment_width + segment_margin) * -1
y_change = 0
if event.key == pygame.K_RIGHT:
x_change = (segment_width + segment_margin)
y_change = 0
if event.key == pygame.K_UP:
x_change = 0
y_change = (segment_height + segment_margin) * -1
if event.key == pygame.K_DOWN:
x_change = 0
y_change = (segment_height + segment_margin)
# move snake one step
my_snake.move()
# -- Draw everything
# Clear screen
screen.fill(BLACK)
my_snake.spriteslist.draw(screen)
food.foodlist.draw(screen)
# Flip screen
pygame.display.flip()
# Pause
clock.tick(5)
pygame.quit()
在我的程序中,蛇从 foodlist Sprite 组中“吃掉”了一个 Sprite ,将其移除并调用生长函数。我现在正尝试在食物类中编写一个补充方法,以随机放置一 block 新食物来代替吃掉的食物。目前我的补货功能无法正常工作,我也不知道为什么。我对编程很陌生,尤其是 python 类,非常感谢您的帮助。谢谢!
最佳答案
每次当你吃食物时,都会创建一个新的 Food
实例,并将一个新的 Food_item
附加到新实例。将新的 Food_item
添加到 Food
的现有实例中:
Food().replenish()
food.replenish()
方法吃
:
class Snake():
# [...]
def eat(self):
hit_list = pygame.sprite.spritecollide(self.segments[0], Food().foodlist, True)
if len(hit_list) == 1:
food.foodlists.pop(0)
food.foodlist.empty()
self.grow()
elif len(food.foodlists) == 0:
food.replenish()
关于Python Pygame贪吃蛇游戏项目混淆,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/63677897/