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Why won't the sprites in my group show up? (PyGame)

Hi all,
I am writing a snake game, but all is not going well...

Two problems here. First of all, the little circles I use for my sprite
images only show up as quadrants.
Second of all, only the Head sprite for my snake shows up at all. Why?

Here are the class definitions:

! /usr/bin/python

import pygame as PG

seg_size = 20

class SnakeSegment(PG .sprite.Sprite) :
def __init__(self, pos):
PG.sprite.Sprit e.__init__(self )
self.image = PG.Surface([seg_size,seg_si ze])
self.rect = self.image.get_ rect()
self.rect.tople ft = pos

# self.direction = 0
class SnakeHead(Snake Segment):

def __init__(self,p os,spd = 10):
PG.sprite.Sprit e.__init__(self )
SnakeSegment.__ init__(self,pos )
PG.draw.circle( self.image,(255 ,0,0),self.rect .center,4)
self.speed = spd # governs speed of whole snake

def update(self):
self.rect.left += self.speed

class SnakeBody(Snake Segment):
def __init__(self,p os,prev):
PG.sprite.Sprit e.__init__(self )
SnakeSegment.__ init__(self,pos )
PG.draw.circle( self.image,(0,2 55,0),self.rect .center,4)

self.previous=p rev
def update(self):
self.rect.cente r = self.previous.r ect.center

class SnakeTail(Snake Segment):
def __init__(self,p os,prev):
PG.sprite.Sprit e.__init__(self )
SnakeSegment.__ init__(self,pos )
PG.draw.circle( self.image,(0,0 ,255),self.rect .center,4)

self.previous=p rev

def update(self):
self.rect.cente r = self.previous.r ect.center

class Snake(PG.sprite .OrderedUpdates ):

def __init__(self, pos, length = 6):
PG.sprite.Order edUpdates.__ini t__(self)
self.head = SnakeHead(pos)
self.segs = length - 2
self.position = pos
self.add(self.h ead)

prev = self.head

posx, posy = pos

for x in range(self.segs ):
posx += seg_size
prev = (SnakeBody((pos x,posy),prev))
self.add(prev)
# print prev.rect.cente r
posx += seg_size
self.add(SnakeT ail((posx, posy),prev))
self._spritelis t.reverse() # we need tail first, head last

Whew!
And here is my little test program.

#!/usr/bin/python

from snake import *
#import pygame as PG
DBUF = PG.DOUBLEBUF
FSCR = PG.FULLSCREEN
screenx = 640
screeny = 480

def main():
PG.init()

screen = PG.display.set_ mode((screenx, screeny)) #python likes to make
pointers.

q = Snake((100,100) )
q.draw(screen)
q.update()
PG.display.flip ()
while 1:
PG.event.pump()
keyinput = PG.key.get_pres sed()
if keyinput[PG.K_ESCAPE] or PG.event.peek(P G.QUIT):
break

if __name__ == '__main__':
main()

Whoop, there it is. What have I done wrong?

Mar 18 '06 #1
1 1526
Isis wrote:
Hi all,
I am writing a snake game, but all is not going well...


Chances are good that you'll get access to many more potential
respondents by posting the question to the Pygame mailing list.
Mar 18 '06 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

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