Not a direct answer to your question, but I would factor out portions of
your code into separate functions. There's one school of thought in the
programming world that says functions or methods shouldn't be more than 10
lines of code. People can agree or disagree, but regardless it helps to
debug a problem like this when the code is organized into named functions.
S for example, a common convention is to have a gameloop() function which
would contain your root while: statement. Then within the gameloop, you
could have a handle_keys() function which handles keys, a process_input,
and an update_snake() to handle the graphics. You've probably seen the
basic 'game loop' flow yes? Input -> process -> output -> wait ? ?
For me, when I'm crunching through a difficult problem it often helps to do
a cleanup refactor and shake loose my thinking.
Good luck :)
On Mon, Jun 24, 2019 at 8:19 AM Adam Coombes <mac.badmo...@gmail.com> wrote:
> I've created a list of sprites to try and make a basic 'snake' game. The
> idea is to shuffle each sprite to the position of the next, starting at the
> end of the tail, and then move the head. As I append new tail pieces, they
> should 'snake' along. However, when I move the head sprite ( Snake[0] in my
> list 'Snake'), they all seem to move to the same position. Even when I omit
> the line that moves them along by commenting out 'Snake[tail] =
> Snake[tail-1]' in my for loop, it still moves every sprite in the list
> Snake[] to the same place as Snake[0], which is inexplicable to me as I'm
> not even moving them then. Can anyone point out my mistake please? This is
> just a learner project, but it's driving me nuts.
>
> import pygame, sys
> from pygame.locals import*
> import random
> #colours========================================================
> BLACK = (0,0,0)
> WHITE = (255,255,255)
> RED = (255,0,0)
> GREEN = (0,255,0)
> BLUE = (0,0,255)
> PURPLE = (128,0,128)
> GREY = (128,128,128)
> YELLOW = (255,255,0)
> pygame.init()
> Height = 1920
> Width = 1080
> score = 0
> basicfont = pygame.font.SysFont(None, 50)
> Score = basicfont.render("Score: " + str(score), True, WHITE, GREEN)
> ScoreRect = Score.get_rect()
> ScoreRect.left =560
> ScoreRect.bottom = 130
> moveLeft = False
> moveRight = False
> moveUp = False
> moveDown = False
> PlayerSpeed = 40
> def GameBoard():
> pygame.display.set_caption("Snake_Game")
> Window.fill(GREEN)
> pygame.draw.line(Window, BLACK,(560,140),(1360,140),4)
> pygame.draw.line(Window, BLACK,(560,140),(560,940),4)
> pygame.draw.line(Window, BLACK,(1360,140),(1360,940),4)
> pygame.draw.line(Window, BLACK,(560,940),(1360,940),4)
> #GAME===========================================================
> mainClock = pygame.time.Clock()
> Window = pygame.display.set_mode((Height,Width), 0, 32)
> #PLayer=========================================================
>
> Snake =[]
> Snake.append (pygame.Rect(940,500,40,40))
> playerImage = pygame.image.load("Snake.GIF")
> Window.blit(playerImage,Snake[0])
> #Apple==========================================================
> def PlotApple():
> global AppleX
> global AppleY
> global Apple
> AppleX = random.randint(560,1320)
> AppleY = random.randint(140,900)
> Apple = pygame.Rect(AppleX,AppleY,40,40)
> PlotApple()
> AppleImage = pygame.image.load("Apple.GIF")
> Window.blit(AppleImage,Apple)
> pygame.display.update()
> #================================================================
> while True:
> for event in pygame.event.get():
> if event.type == KEYDOWN:
> if event.key == K_ESCAPE:
> pygame.quit()
> #===================================================
> if event.type == KEYDOWN:
> #===============================================
> if event.key == K_LEFT:
> moveRight = False
> moveLeft = True
> moveDown = False
> moveUp = False
> #===============================================
> if event.key == K_RIGHT:
> moveLeft = False
> moveRight = True
> moveDown = False
> moveUp = False
> #===============================================
> if event.key == K_UP:
> moveDown = False
> moveUp = True
> moveLeft = False
> moveRight = False
> #===============================================
> if event.key ==K_DOWN:
> moveUp = False
> moveDown = True
> moveLeft = False
> moveRight = False
> #KEYUP===============================================
> if event.type == KEYUP:
> #===================================================
> if event.key == K_ESCAPE:
> pygame.quit()
> sys.exit()
> #MovePlayer===================================================
> mainClock.tick(10)
> GameBoard()
> for tail in range (len(Snake)-1,0,-1):
> print(Snake,tail)
> Snake[tail] = Snake[tail-1]
> Window.blit(playerImage,Snake[tail])
> print(Snake,tail)
> if moveDown:
> Snake[0].top += PlayerSpeed
> if moveUp:
> Snake[0].top -= PlayerSpeed
> if moveLeft:
> Snake[0].left -= PlayerSpeed
> if moveRight:
> Snake[0].right += PlayerSpeed
> if Snake[0].bottom >=940 or Snake[0].top<+140 or Snake[0].left<=560 or
> Snake[0].right>=1360:
> pygame.quit()
> Score = basicfont.render("Score:" + str(score), True, WHITE, GREEN)
> Window.blit(playerImage,Snake[0])
> Window.blit(AppleImage,Apple)
> Window.blit(Score,ScoreRect)
> if Snake[0].colliderect(Apple):
> score = score +50
> Snake.append (Snake[0])
> PlotApple()
> pygame.display.update()
>
--
A musician must make music, an artist must paint, a poet must write, if he
is to be ultimately at peace with himself.
- Abraham Maslow
