On Sep 11, 2007, at 9:00 PM, Ian Mallett wrote:
Opps. That's:
if frame_number%10 == 0: #frame_number is a multiple of ten
#draw frame 1
elif frame_number%9 == 0: #frame_number ends in 9
#draw frame 2
[snip lots of elifs]
Or assuming you store the images in a list, e.g.:
images = [image1, image2, image3, image4, image5]
then
this_image = images[frame_number % len(images)]
which works with any arbitrary number of images without code changes
and is faster and much more concise that a big if/elif block (which
IMO should be avoided as much as possible).
I also have this handy class for loading lots of images from files
that I can match with a pattern:
class Animation:
def __init__(self, file_pattern, colorkey=(0,0,0), alpha=255, fade=0):
self.images = []
for path in glob.glob('data/%s' % file_pattern):
image = pygame.image.load(path).convert()
image.set_colorkey(colorkey, RLEACCEL)
image.set_alpha(max(alpha, 0), RLEACCEL)
alpha -= fade
self.images.append(image)
Which I use for explosions where I want the alpha to fade to
transparent as it plays through.
You use it like so:
xplode = Animation('xplode/*.jpg', alpha=180, fade=8)
or to just load it with everything opaque:
anim = Animation('somedir/*.png')
You said you were using sprite sheets though so it may not be that
helpful to you.
-Casey
