On Thu, Apr 02, 2009 at 10:19:02AM -0400, Edward Heil wrote:
> I made an application which draws a Sierpinski triangle. It is
> constantly drawing pixels on the screen.
>
> I use rectangles with a height and width of 1 for those pixels.
>
> I draw them a large number (hundreds) at a time, inside image blocks, so
> it isn't adding an object for every pixel, it's adding an image for
> every hundred or thousand pixels.
>
> But it'd still be nice to modify an existing Image by adding more pixels
> to it, instead of adding a bunch of new images.
You can draw on images by calling drawing functions on your image
objects. A simple example that draws whereever the mouse goes:
Shoes.app do
@image = image('/path/to/image.jpg')
oldx, oldy = 0, 0
motion do |x, y|
print "motion called: #{x}, #{y}, #{oldx}, #{oldy}\n"
@image.line(oldx, oldy, x, y)
oldx, oldy = x, y
@image.show()
end
end
-Abhijit
