Re: [pygame] Masks?

[Michael George <mdgeorge@xxxxxxxxxxxxxx>]

I would create separate surfaces and masks for each frame.  If you want 
to keep all the frames in one surface, you can use subsurfaces for each 
frame: http://www.pygame.org/docs/ref/surface.html#Surface.subsurface.

Then create the masks out of the subsurfaces and use Mask.overlap to do 
the intersection testing.

--Mike

inigo delgado wrote:
> Hi all:
>
> I don't have clear how to use the masks to collisions....
>
> I have a bmps with a keycolor and with many frames of the same
> spaceship in each and blit a area of them to simulate movement....
>
> How can I do a mask of one part -a frame- of the bmp to see if it
> collides with another part -another frame- of another bmp? To find a
> exact collision of both? I've done collisions with rectangles, but I
> wanna put big ships (like level bosses or medium size ships) and in
> that ships this aproximation is poor, so I want, if is a rectangle
> collition, to have the posibility of know if its a real collision
>
> If I do a mask of the bmps, I understand that then pygame will test
> all the frames in each bmp with all frames of the other bmp?...?¿
>
>