Thanks very much for both replies! Pixelarray looks like it will do exactly
what I need at the moment.
Nirav: I'm also interested in the transform.threshold method, but am a bit
confused as to how to implement it.
Let's say I have:
screen = pygame.display.set_mode(SCREEN_SIZE)
map_image = pygame.image.load('map_image.png').convert_alpha()
And then in my main game loop, I render with:
screen.blit(map_image, (0, 0))
pygame.display.update()
How/where exactly do I implement transform.threshold? I think part of what's
confusing me is having the two surface parameters, "destsurface," and
"surface"...
Thanks again!
Jordan
On Mon, Mar 15, 2010 at 10:53 AM, Nirav Patel <[email protected]> wrote:
> A very quick way of doing it is just to use transform.threshold [0].
> Something along the lines of:
>
> yellow = (255, 255, 0) # or whatever yellow color you want
> threshold = (10, 10, 10) # or whatever threshold works
> blue = (0, 0, 255)
> pygame.transform.threshold(destsurface, surface, yellow, thresh, blue,
> 1, None, True)
>
> [0]
> http://www.pygame.org/docs/ref/transform.html#pygame.transform.threshold
>
> On Sun, Mar 14, 2010 at 5:34 PM, Ian Mallett <[email protected]> wrote:
> > Hi,
> >
> > You could replace the pixels of the given color using surfarray or
> > pixelarray before blitting. You could also make it an 8 bit surface and
> > adjust the palette. You could also just do a manual loop though all the
> > pixels with .get_at(), .set_at(). Personally, I'd go with surfarray or
> > pixelarray--it's fast, and doesn't suffer from bit-depth loss like
> > palettes.
> >
> > There may be better ways, contingent on what exactly you're doing. You
> may
> > be able to adjust your algorithm so that this situation doesn't happen.
> A
> > more complete description of what you're doing?
> >
> > Ian
> >
>
