[pygame] Sprite troubles

[Nathan BIAGINI <nathan.open@xxxxxxxxx>]

Hi everyone,

it sounds like a stupid question but i have written a really simple program where i just want to add a sprite to a sprite group and then draw the containing of this group.

Here is the main code :


> import pygame
> from sprites import Node
>
> pygame.init()
>
> screen = pygame.display.set_mode((640, 480))
> node_group = pygame.sprite.RenderPlain()
>
> node = Node((156, 234), 0)
> node_group.add(node)
>
> while 1:
>         node_group.update()
>         node_group.draw(screen)
>
>         pygame.display.flip()

And here is my sprite class :

import pygame
from pygame.locals import *
from loads import loadImage

class Node(pygame.sprite.Sprite):
        '''
        Node class represent the sprite of each node of the
        map. So, one instance of Node is created for each
        node.
        '''

        def __init__(self, pos, node_type):
                pygame.sprite.Sprite.__init__(self)

                self.pos = pos
                self.node_type = node_type

                if self.node_type == 0:
                        self.image, self.rect = loadImage('ground.bmp', -1)

                elif self.node_type == 1:
                        self.image, self.rect = loadImage('wall.bmp', -1)

                elif self.node_type == 2:
                        self.image, self.rect = loadImage('hole.bmp', -1)

                self.rect.topleft = pos

        def update(self):
                pass

I maybe a bit tired but i can't see what i m doing wrong...

Thanks for your help.