I didn't know parallax scrolling had a name! Clever stuff.
Here's a shoes implementation of the parallax scrolling example on
Wikipedia. I'm not sure if this will display correctly on all
platforms since I can't quite figure out why I get a gap in the scroll
when I change the <= 5 to <= 0. Perhaps a deeper bug lurks there. Not
really sure.
Hopefully this is enough to get you started anyway:
Shoes.app :width=>320, :height=>200 do
def parallax img, z
iw = [width, width*z].max
layers = [image(img, :top=>0, :left=>0),
image(img, :top=>0, :left=>iw)]
animate 24 do
layers.each do |layer|
layer.move layer.left-z, 0
layer.move iw, 0 if layer.left+iw <= 5
end
end
end
wiki = 'http://upload.wikimedia.org/wikipedia/commons'
parallax "#{wiki}/f/f5/Parallax-scroll-example-layer-0.gif", 0
parallax "#{wiki}/0/09/Parallax-scroll-example-layer-1.gif", 1
parallax "#{wiki}/0/0a/Parallax-scroll-example-layer-2.gif", 2
parallax "#{wiki}/8/85/Parallax-scroll-example-layer-3.gif", 3
end
On Mar 22, 2009, at 1:16 AM, Michael Shapiro wrote:
Hi Folks,
For fun, I'd like to build a little side-scrolling game kit for shoes.
Has any attempted to implement parallax scrolling? (http://en.wikipedia.org/wiki/Parallax_scrolling
)
--Mike
