Re: transforming stroked paths (was libart transforming svp's)
- From: Lauris Kaplinski <lauris ariman ee>
- To: clee v1 wustl edu
- cc: gnome-devel-list gnome org, recipient list not shown: ;
- Subject: Re: transforming stroked paths (was libart transforming svp's)
- Date: Sat, 8 Apr 2000 16:17:13 +0200 (CEST)
On Fri, 7 Apr 2000 email@example.com wrote:
> I've got an isolated example of the problem I'm having transforming stroked
> paths. I'm following the previous advice of stroking a vpath to an svp, then
> using vpath_from_svp to return it to vpath land and transforming it there.
> When I do this and invert the y-axis in my transform, the output looks very
> ugly: no antialiasing, the line is much thicker. My guess is that it has
> something to do with the orientations of the paths getting inverted and
> therefore the wrong regions are getting filled. I would hypothesize that
> orientatio preserving affine transformations would be fine.
> Has anyone worked around this problem before? Am I doing something wrong? Or,
> shoudl I go ahead and invest the effort into writing an
> svp_transform_stroke_vpath(..) or something which does the transform together
> with the stroke operation so that creating the SVP can be the last step before
> Thanks for all the help I've gotten so far.
As much, as I can remember vpaths have to be CCW, if you want to fill
these. Mirroring stroked vpath inverses its orientation.
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