Re: [pygame] Another sprite issue.

[Percival Kelley]

Oh. I see. Thank you very much. I knew it had to be something simple.

On Mon, Jul 28, 2008 at 5:40 PM, Brian Fisher [EMAIL PROTECTED]wrote:

 They are all using the same rect object, and you are positioning that 1
 single rect to the location of the wall. So collision is working for all,
 but all of them are positioned in the same place.

 Instead of calling get_rect once and reusing the result, you should pass
 the image to each sprite and have them each call get_rect themselves to get
 their own unique rect.



 On Mon, Jul 28, 2008 at 8:36 PM, [EMAIL PROTECTED] wrote:

 I want to display sprites with the same graphic across several areas
 of my game. So I load the image into one variable, and then create all
 my sprites from that same image.

 All the sprites appear properly, but collision detection only works on
 the last sprite drawn using the variable with the image. Why is this?
 Do I have to reload the image everytime?

 This is my code to load the image:

 def load_image(name, transparent=0, colorkey=None): #from the line-by-
 line chimp tutorial
fullname = os.path.join('img', name)
try:
if transparent == 0:
image = pygame.image.load(fullname).convert()
else:
image = pygame.image.load(fullname).convert_alpha()
except pygame.error, message:
print 'Cannot load image:', name
raise SystemExit, message
if colorkey is not None:
if colorkey is -1:
colorkey = image.get_at((0,0))
image.set_colorkey(colorkey, RLEACCEL)
return image, image.get_rect()

 To setup the sprite:

 class Units(pygame.sprite.Sprite):

def __init__(self, img, loc1 = 250, loc2 = 250):
pygame.sprite.Sprite.__init__(self) #start up sprites

#locs
self.loc1 = loc1
self.loc2 = loc2

#create sprite
self.image, self.rect = img
self.rect.center = [self.loc1, self.loc2]

 and actually making the sprites:

 wallGfx = load_image('wall.png', 1)
 self.wall1 = Units(wallGfx2, 400, 325)
 self.screen.blit(self.wall1.image, self.wall1.rect)

 self.wall2 = Units(wallGfx, 400, 400)
 self.screen.blit(self.wall2.image, self.wall2.rect)
 self.egroup = pygame.sprite.RenderUpdates(self.wall1, self.wall2)

 pygame.display.update()

 Now, doing this, only the sprite at 400,400 (self.wall2) will have
 proper collision detection. They're both displayed, but only the last
 one added to the group has it. If I remove self.wall2, self.wall1 will
 detect it properly.

 Any ideas?

 Thanks in advance.

Re: [pygame] Moving sprites.

[Percival Kelley]

Awesome. Thank you. That did the trick.

On Sun, Jul 27, 2008 at 1:10 PM, Paulo Silva [EMAIL PROTECTED] wrote:

 well, for now i were enjoying these ones
 http://www.cs.iupui.edu/~aharris/pygame/ch04/http://www.cs.iupui.edu/%7Eaharris/pygame/ch04/

 

 On Sun, Jul 27, 2008 at 11:38 PM,  [EMAIL PROTECTED] wrote:
  So I've read piman's tutorial and checked out a few others. I'm still
  confused. I don't really understand the process of moving a sprite
  around. I would like to use RenderUpdates and such, but I'm lost.
 
  I basically have a simple script that moves a ship around a background
  (the background is an image.)
 
  To create the sprite I'm using:
 
  class Units(pygame.sprite.Sprite):
 
 def __init__(self, img, loc1 = 250, loc2 = 250):
 pygame.sprite.Sprite.__init__(self) #start up sprites
 
 #locs
 self.loc1 = loc1
 self.loc2 = loc2
 
 #create sprite
 self.image, self.rect = load_image(img)
 self.rect.center = [self.loc1, self.loc2]
 
  I create the ship like this:
  self.ship = Units('bship.png')
  self.screen.blit(self.ship.image, self.ship.rect)
 
  To redraw the ship when it moves I'm using this:
 
  self.ship.loc1 = n1 #n1 and n2 are setup earlier in the code that
  looks for key presses and sets the pixel difference
  self.ship.loc2 = n2
  self.ship.rect.center = [self.ship.loc1, self.ship.loc2]
  print self.ship.rect.center
  self.screen.blit(self.bg, (0,0))
  self.screen.blit(self.ship.image, self.ship.rect.center)
  pygame.display.flip()
 
  I'm really pretty confused at this point. I know I'm just doing
  something stupid, but I haven't managed to get any other code working
  to redraw the ship properly when it's moved. I don't have the code
  from when I was doing it wrong, but basically, can someone point me in
  the right direction to changing this over to just redraw the
  appropriate areas?
 
  Thanks, and sorry this was rambling.