On 23.07.07, Joerg Lehmann wrote:
> On 20.07.07, Andre Wobst wrote:
> > On 19.01.07, Michael Schindler wrote:
> > > On 19.01.07, kib2 wrote:
> > > >   1. I've tried without success to hatch a path with a color, but it
> > > >      still remains black. But maybe I missed something ? There's
> > > >      nothing on the docs.
> > > 
> > > I had a look into the code. It appears that in pattern.py, the
> > > patterns can only be used to fill (they are derived from
> > > style.fillstyle). Maybe Jörg or André know more about the reason
> > > behind this restriction.
> > 
> > Question: Do you want coloured hatches? AFAIR there are different
> > hatch types, some of them might contain colours (I just don't remember
> > -- I would need to have a look into the specs). AFAIR we support only
> > a very single hatch type, maybe colour changes are not allowed there.
> > Probably.
> 
> I would also need to look this up.
> 
> > Beside that Michael is right, that we support hatching for filling
> > only. I think in PostScript you can use a hatch style for stroking as
> > well, but this is not available in PDF. I'm not totally sure here
> > eigher, but there is some issue like that.
> 
> AFAIR it indeed did not work correctly in PDF, that's why it's a fill
> style.

Just to add a single comment from a PyX user: The hatch filling was
essentially the only feature that caused problems when printing, as
far as I experienced. The printer was a high-class Lexmark with
sufficient memory, but the way the hatched patterns are created in PyX
made it stumble.

Instead of adding more features to this type of patterns, I would
rather suggest to remove the feature or replace it by a more stable
one (hatching "by hand": stroking many lines and then clip). In
combination with parallel deformers, this can be used to create an
effect such as patterning a line.

Michael.

-- 
Michael Schindler
  Laboratoire de Physico-Chimie Théorique.
  ESPCI. 10 rue Vauquelin, 75231 Paris cedex 05, France.
  Tel: +33 (0)1 40 79 45 97    Fax: +33 (0)1 40 79 47 31
  http:  www.pct.espci.fr/~michael

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