Re: [pygame] Weird problem

[Farai Aschwanden <fash@xxxxxxxxxx>]

Hi all

I think there are different ways to solve the problem, depending on  
your project. The most proper way is to have more animation movements  
to make it looking slower (probably easier when using opengl than  
pure 2D).
If anything starts lagging when moving around you have to optimize  
it. Some ideas:

- Aplhablitting takes longer than w/o
- Do you really need a framerate of 30? Many games works also great  
with a lower framerate
- Some precalculated shapes (f.e. rotation) will be blitted faster  
than bring it to the right size/rotation, etc. Sure, the memory  
consumation is going up on precalculated and in memory stored images
- if you move sprites/images around the screen, then make sure to  
reblit the background only where its needed
- Is there a lot of Python code between two blit steps? Can that one  
be optimized?
- Many people calls the pygame functions (and also other included  
packages) by its packagename.function_name. If such a routine is  
called often (thousands of times and more) that way (like a lot of  
blitting) it can be optimized: In your variable declaration area  
write: paint = pygame.blit
Late on in the code use "paint (image...)" instead of "pygame.blit  
(image...)". This helps Python not to check all the time if the  
module/function is present and valid.

There are many many more optimation possibilities but they are  
heavily project related.

Keep in mind that Python is still a scripting language, tough the  
makers of Pygame made a great job with it!

Just my 2 cents.

Gruss Farai


Am 14.10.2006 um 00:37 schrieb Kai Kuehne:

> Hi Luke,
>
>
> On 10/14/06, Luke Paireepinart <rabidpoobear@xxxxxxxxx> wrote:
> > [Documentation]
> > HTH,
> > -Luke
>
> Not really. Ok, maybe I'm a bit tired but I try to explain the real
> problem I'm currently have (primarily in thinking, well could be also
> time-related ;).
> My real problem is how to move something slow and another thing
> really fast if I set - let's say - the frame rate to 30. For the  
> slow-thing
> I could move it 1 pixel per frame. Ok, works great. And the fast- 
> thing could
> be moved 3 pixels per frame but than it looks not very cool. It's  
> lagging
> and you see the movement-steps. And what if the slow-thing is too  
> fast, though?
> I cannot set the speed to 0.5 because pygame.Rect uses integers for  
> the
> position things.
>
> Probably (well, surely probably) this is a noob question. But atm,
> I'm not getting to it...
>
> Thanks
> Kai