Re: [pygame] keep a key pressed and then move a sprite

[Leif Theden <leif.theden@xxxxxxxxx>]

for my project "python fighter framework"
(http://www.pygame.org/project-fighter+framework-1550-2747.html), i
handle keyup and keydown events separately and maintain a dictionary
of pressed keys.  then the game can properly handle multiple key
presses (though subject to the evil keyboard problem).

also, i have a dict that maps keys to specific actions, so that
reconfiguring the keys doesn't require modifying the source code.
consider:

BUTTON_HI_KICK = 1
BUTTON_MED_KICK = 2
BUTTON_LOW_KICK = 4
etc...

# define the default keys.  change the dict at runtime or with a config file.
p1_key_def = {
   BUTTON_HI_KICK: K_e,
   BUTTON_MED_KICK: K_w,
   etc...
}

-------------------------------------------------------------------------------------------
then later....

if keys[p1_key_def[BUTTON_HI_KICK]]:
   do stuff

if keys[p1_key_def[BUTTON_MED_KICK]]:
   do stuff


if you have a background that doesn't change often, then i would say
that 99% of the time you are better off with the "dirty rect" method
of drawing.  I use that for my game and it works pretty well.

On Fri, Nov 26, 2010 at 2:18 AM, Nathan BIAGINI <nathan.open@xxxxxxxxx> wrote:
> Ok thanks but i saw that psyco do not supports 2.7 release of python so i
> think i ll not try it for the moment.
>
> Ok so thanks everybody be sure to see me again on this mail list, i ll of
> course do my best to read doc to solve my problem the best i can, it s
> always a pretty good exercice for my english haha
>
> 2010/11/24 Kris Schnee <kschnee@xxxxxxxxxx>
>>
>> On 2010.11.24 1:53 PM, Nathan BIAGINI wrote:
>>>
>>> Ok thanks to reply so fast :) yeah of course, it seems obvious now but i
>>> didn't know there is a way to manage keyboard state without the common
>>> event loop.
>>> I ll use this created topic to ask something else about the optimization
>>> of a game written with pygame. Restrict frames per second with
>>> clock.tick(xx) and only update dirty rects (in case of static
>>> background) is enough for a quite "simple" 2D game? Or there re more
>>> optimizations to do? I don't try to reach perfect performance, only want
>>> to make my faster as possible and less CPU consuming.
>>
>> One other thing to try is an acceleration system.
>> "Psyco" uses a compiler to speed up a Python program very easily. See
>> http://psyco.sourceforge.net/ . All you need to do after installing it is
>> add the code "import psyco ; psyco.full()".
>>
>> "Boost" ( http://beta.boost.org/doc/libs/1_45_0/libs/python/doc/index.html
>> ) lets you write code in the C language and access that from Python. I've
>> not tried that.
>
>