我正在制作一个简单的蛇游戏，它所要做的就是显示一个计时器（蛇持续多长时间），并在蛇碰到任何白色（侧面或自身）时显示游戏结束画面。我还必须结合积分系统，即蛇吃食物的时间。食物被着色为紫色，我创建了一行代码，当“蛇”与紫色碰撞时，将foodx和foody设置为一个新位置，但没有这样做，而是创建了另外5个正方形，直到系统崩溃...任何帮助
这是我的代码
食物变量-第36行， 食物碰撞-282行， 绘制的食物-297，（或者仅是ctrl + F并键入食物，它不会重复出现那么多）
# October 14, 2019
# Simple Snake Game
# importing variables
import pygame
import sys
import time
import random
pygame.init()
# colours
WHITE = (255,255,255)
BLACK = (0, 0, 0)
GREEN = (0,255,0)
RED = (255,0,0)
BLUE = (0,0,255)
YELLOW = (255,255,0)
CADETBLUE = (100,149,237)
SPRINGGREEN = (0,255,127)
PURPLE = (154, 136, 180)
# screen variables
screenX = 800
screenY = 600
screenSize = (screenX, screenY)
screen = pygame.display.set_mode((screenSize), 0)
screenW = screen.get_width() # gets screen width and height
screenH = screen.get_height()
screenCenterX = int(screenW/2) # gets center of screen
screenCenterY = int(screenH/2)
pygame.display.set_caption("Hajar's Snake Game")
# apple (food point) variable
foodX = random.randint(50,700)
foodY = random.randint(50,600)
foodW = 2
foodH = 2
p1_score = 0
# timer text
timerTitle = pygame.font.SysFont("Consolas", 30)
#set up clock to control frames per second of main loop
clock = pygame.time.Clock()
# crash collision variables
collisionX = 0
collisionY = 0
collisionColour = None
screen.fill(BLACK)
pygame.display.update()
clock = pygame.time.Clock()
# snake variables
snakeHeadX = 100
snakeHeadY = 300
snakeHeadW = 10
snakeHeadH = 10
snakeHeadDX = 0
snakeHeadDY = 0
# timer / FPS
startTime = time.perf_counter()
elapsedTime = 0
# set loops to false
intro = True
level = False
game = False
final = False
# loops
while intro:
FPS = 60
clock.tick(FPS)
for event in pygame.event.get():
if event.type == pygame.QUIT:
intro = False
level = False
game = False
final = False
# code for moving snake by itself for the start animation
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_c: # when c is pressed the intro closes and opens the levels up
intro = False
level = True
pygame.display.update()
elif event.key == pygame.K_q:
sys.exit()
elif intro == True:
snakeHeadDX = 1
smnakeHeadDY = 0
# makes the snake turn by itself
if snakeHeadX > 770:
snakeHeadDX = 0
snakeHeadDY = 1
if snakeHeadY > 550:
snakeHeadDX = -1
snakeHeadDY = 0
if snakeHeadX < 20:
snakeHeadDX = 0
snakeHeadDY = -1
# setting the text for the title and instructions
titleFont = pygame.font.SysFont("arial", 30)
instructions1Font = pygame.font.SysFont("arial", 27)
# creates the texts that will be blitted onto the screen
title = titleFont.render("The Snake Game", True, WHITE)
instructions1 = instructions1Font.render("Instructions:", True, WHITE)
instructions2 = instructions1Font.render("- use arrow keys to move the snake", True, WHITE)
instructions3 = instructions1Font.render("- do not hit the walls or your snake!", True, WHITE)
instructions4 = instructions1Font.render("- try to collect food to up your score.", True, WHITE)
instructions5 = instructions1Font.render("Levels:", True, WHITE)
instructions6 = instructions1Font.render("- easy, slow-paced, points are normal.", True, WHITE)
instructions7 = instructions1Font.render("- medium, slightly more paced, points are doubled.", True, WHITE)
instructions8 = instructions1Font.render("- hard, super fast, points are quadrupled", True, WHITE)
instructions9 = instructions1Font.render("press 'c' to continue to choose level", True, WHITE)
# blits the texts onto screen
screen.blit(title, (200,350))
screen.blit(instructions1, (200,370))
screen.blit(instructions2, (200,385))
screen.blit(instructions3, (200,400))
screen.blit(instructions4, (200,415))
screen.blit(instructions5, (200,438))
screen.blit(instructions6, (200,453))
screen.blit(instructions7, (200,468))
screen.blit(instructions8, (200,483))
screen.blit(instructions9, (200,519))
# moves the snake
snakeHeadX = snakeHeadX + snakeHeadDX
snakeHeadY = snakeHeadY + snakeHeadDY
# draws the snake
pygame.draw.rect(screen, WHITE,(snakeHeadX, snakeHeadY, snakeHeadW, snakeHeadH), 0)
pygame.display.update()
while level:
clock.tick(FPS)
screen.fill(BLACK)
for event in pygame.event.get():
if event.type == pygame.QUIT:
level = False
# code for moving snake by itself for the start animation
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_e: # when e is the easy level starts
FPS = 60
level = False
game = True
pygame.display.update()
if event.key == pygame.K_m: # when m is the medium level starts
FPS = 300
game = True
level = False
pygame.display.update()
if event.key == pygame.K_h: # when h is the hard level starts
pygame.display.update()
FPS = 550
game = True
screen.fill(BLACK)
level = False
screen.fill(BLACK)
elif event.key == pygame.K_q:
sys.exit()
# updates the screen
pygame.display.update()
# creates the font/size for the levels
levelTitleFont = pygame.font.SysFont("arial", 30)
levelFont = pygame.font.SysFont("arial", 27)
# creates the text content
levelTitle = levelTitleFont.render("Level Menu:", True, RED)
easyLevel = levelFont.render("- press 'e' for easy.", True, RED)
mediumLevel = levelFont.render("- press 'm' for medium.", True, RED)
hardLevel = levelFont.render("- press 'h' for hard.", True, RED)
# blits the text onto the screen
screen.blit(levelTitle, (100,300))
screen.blit(easyLevel, (200,390))
screen.blit(mediumLevel, (200,410))
screen.blit(hardLevel, (200,430))
# updates the screen
pygame.display.update()
while game:
clock.tick(FPS)
for event in pygame.event.get():
if event.type == pygame.QUIT:
intro = False
level = False
game = False
final = False
# code for moving keys
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT and snakeHeadDX != 1:
snakeHeadDX = -1
snakeHeadDY = 0
elif event.key == pygame.K_RIGHT and snakeHeadDX != -1:
snakeHeadDX = 1
snakeHeadDY = 0
elif event.key == pygame.K_UP and snakeHeadDY != 1:
snakeHeadDX = 0
snakeHeadDY = -1
elif event.key == pygame.K_DOWN and snakeHeadDY != -1:
snakeHeadDX = 0
snakeHeadDY = 1
elif event.key == pygame.K_q:
sys.exit()
# code for detecting if snake has hit screen
# right
if snakeHeadX > screenW - snakeHeadW:
snakeHeadX = screenCenterX
snakeHeadY = screenCenterY
screen.fill(BLACK)
snakeHeadDX = 0
snakeHeadDY = 0
# left
if snakeHeadX < 0:
snakeHeadX = screenCenterX
snakeHeadY = screenCenterY
screen.fill(BLACK)
snakeHeadDX = 0
snakeHeadDY = 0
# up
if snakeHeadY < 0:
snakeHeadX = screenCenterX
snakeHeadY = screenCenterY
screen.fill(BLACK)
snakeHeadDX = 0
snakeHeadDY = 0
# down
if snakeHeadY > screenH - snakeHeadW:
snakeHeadX = screenCenterX
snakeHeadY = screenCenterY
screen.fill(BLACK)
snakeHeadDX = 0
snakeHeadDY = 0
# checking for right side of snake head
if snakeHeadDX > 0:
collisionX = snakeHeadX + snakeHeadW + 1
collisionY = snakeHeadY + snakeHeadH // 2
collisionColour = screen.get_at((collisionX,collisionY))
# checking for left side of snake head
elif snakeHeadDX < 0:
collisionX = snakeHeadX - 1
collisionY = snakeHeadY + snakeHeadH // 2
collisionColour = screen.get_at((collisionX,collisionY))
# checking for bottom side of snake head
elif snakeHeadDY > 0:
collisionX = snakeHeadX + snakeHeadW // 2
collisionY = snakeHeadY + snakeHeadH + 1
collisionColour = screen.get_at((collisionX,collisionY))
# checking for top side of snake head
elif snakeHeadDY < 0:
collisionX = snakeHeadX + snakeHeadW // 2
collisionY = snakeHeadY - 1
collisionColour = screen.get_at((collisionX,collisionY))
# resets when the snake collides into itself
if collisionColour == RED:
screen.fill(BLACK)
snakeHeadX = screenCenterX
snakeHeadY = screenCenterY
snakeHeadDX = 0
snakeHeadDY = 0
if collisionColour == WHITE:
screen.fill(BLACK)
snakeHeadX = screenCenterX
snakeHeadY = screenCenterY
snakeHeadDX = 0
snakeHeadDY = 0
elapsedTime = int(time.perf_counter() - startTime)
# when the snake eats food
if collisionColour == PURPLE:
foodX = random.randint(50,700)
foodY = random.randint(50,650)
p1_score += 1
# moves the snake
snakeHeadX = snakeHeadX + snakeHeadDX
snakeHeadY = snakeHeadY + snakeHeadDY
#speed
clock.tick(FPS)
# draws the snake
pygame.draw.rect(screen, WHITE,(snakeHeadX, snakeHeadY, snakeHeadW, snakeHeadH), 0)
pygame.draw.rect(screen, PURPLE,(foodX, foodY, foodW, foodH), 0)
pygame.display.update()
while final:
for event in pygame.event.get():
if event.type == pygame.QUIT:
main = False
final = False
## put code to display score and message here
## put code to ask user to play again here
# quit pygame and exit the program (i.e. close everything down)
pygame.quit()
sys.exit()
请帮助！
答案 0 :(得分：1)
获取多个食物的原因是多次触发了碰撞。这样修改代码：
# when the snake eats food
if collisionColour == PURPLE:
print("Nom Nom Nom") # <-- HERE
# Move the food
foodX = random.randint(50,700)
foodY = random.randint(50,650)
p1_score += 1
每次食物项碰撞都会产生“ Nom Nom Nom”的多次打印。
解决此问题的一种方法就是简单地擦除现有食物，然后再将其重新绘制到其他地方：
# when the snake eats food
if collisionColour == PURPLE:
print("Nom Nom Nom")
# Erase the current food
pygame.draw.rect(screen, BLACK,(foodX, foodY, foodW, foodH), 0)
# Move the food
foodX = random.randint(50,700)
foodY = random.randint(50,650)
p1_score += 1
在测试您的代码时，我发现有时它根本无法检测到与食物的碰撞。要解决此问题，我将在蛇的头部周围确定一个矩形，然后使用pygame.rect.collidepoint()确定与(foodX, foodY)的碰撞。
此外，代码需要处理屏幕外显示，但我希望您已经知道这一点。