To get most affine transformations to work correctly, you need to use an
antialiased canvas. This can be done by creating the canvas with
GnomeCanvas(aa=TRUE).
As an example, try editing the fifteen.py example. At the start add the
line "import gnome.affine". Below the line where the canvas is
initialised, add the following line:
canvas.root().affine_absolute(gnome.affine.shear(xshear=0.3))
Now when you run the example, the item's placement should have been
adjusted as expected. The orientation has not however. To fix this, edit
fifteen.py, and find the line "canvas = GnomeCanvas()" and change it to
"canvas = GnomeCanvas(aa=TRUE)". Then it should work correctly. Maybe I
will add an affine transformation example to the next release of
gnome-python.
James.
--
Email: [EMAIL PROTECTED]
WWW: http://www.daa.com.au/~james/
On Wed, 2 Jun 1999, Alexei Gilchrist wrote:
> Hi,
>
> I'm just starting to learn to use the gnome canvas.
>
> Could someone please give me a brief example of affine
> transforms at work (using python) ... particularly
> rotation.
>
> Should this work for any item? eg text
>
> I only seem to get scaling and translation going for
> rect's and the like but not rotation or shearing effects
>
> Or have I completely missed the point?
>
> Many thanks
>
> Alexei
>
>
> James Henstridge wrote:
> >
> > Here is a list post that bounced. Just remember that you need to post
> > with the address you subscribed as.
> >
> > James.
> >
>
> Fixed hopefully.
> A
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