Re: [pygame] Moving sprites.

["René Dudfield" <renesd@xxxxxxxxx>]

hi,

take a look at the aliens.py example that comes with pygame.

In the source .zip   or the docs .exe if you're on windows.
http://pygame.org/download.shtml


On Mon, Jul 28, 2008 at 10:15 AM, Paulo Silva <nitrofurano@xxxxxxxxx> wrote:
> about sprite.image, Surface.copy(): i almost getting the point, and i
> hope not being abusing if i'd ask for a small and simple working
> snippet (small as 1kb-like or less) could show us this - thanks! :-)
>
> -----
>
>
>
> On Mon, Jul 28, 2008 at 1:11 AM, Paulo Silva <nitrofurano@xxxxxxxxx> wrote:
>> thanks! :-)
>>
>>
>> On Mon, Jul 28, 2008 at 1:06 AM, René Dudfield <renesd@xxxxxxxxx> wrote:
>>> make sprite.image use the same surface.
>>>
>>> Surfaces are not copied by default.  You need to use the
>>> Surface.copy() method to create a new one.
>>>
>>> So just assigning the same surface will work for sharing one picture
>>> with lots of sprites.
>>>
>>>
>>> On Mon, Jul 28, 2008 at 9:33 AM, Paulo Silva <nitrofurano@xxxxxxxxx> wrote:
>>>> you welcome! :-) - btw, i'm still trying to to on Pygame what i were
>>>> doing on sdlBasic up to now
>>>> (http://nitrofurano.linuxkafe.com/sdlbasic), stuff like how to get
>>>> lots of sprites from just one picture, etc.
>>>>
>>>> ------
>>>>
>>>> On Mon, Jul 28, 2008 at 12:19 AM, Percival Kelley
>>>> <percivalkelley@xxxxxxxxx> wrote:
>>>>> Awesome. Thank you. That did the trick.
>>>>>
>>>>> On Sun, Jul 27, 2008 at 1:10 PM, Paulo Silva <nitrofurano@xxxxxxxxx> wrote:
>>>>>>
>>>>>> well, for now i were enjoying these ones
>>>>>> http://www.cs.iupui.edu/~aharris/pygame/ch04/
>>>>>>
>>>>>> --------
>>>>>>
>>>>>> On Sun, Jul 27, 2008 at 11:38 PM,  <percivalkelley@xxxxxxxxx> 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.
>>>>>> >
>>>>>
>>>>>
>>>>
>>>
>>
>