Re: [PyX-devel] Smoothing patterns

[Joerg L. <jo...@us...>]

Hallo Michael,

On 22.06.05, Michael Schindler wrote:
> I remember that we had a discussion about smoothing patterns in PyX.
> I will need this for visualizing some Finite Elements -- what is the
> state of this development. What was the reason not to implement this
> feature?

I remember having had a look into this, but it seemed quite complicated
and there was no real need at that time. In particular, the sheer number
of different shading types would make an interface rather hard to
implement.

> I played around with it but with little success. What works
> is the "shfill" operator that fills a patch (triangle, deformed
> square...) with a shading but using this as a shading pattern (in
> terms of a ressource) and using the pattern later did not work.

You mean using it in a fill operation. If I understand the PLRM
correctly, this should work as any other colour/pattern. Maybe it's
a problem of the renderer?

> The documentation says something about LanguageLevel 3 but I cannot
> figure out if this applies to the whole shading/patterns.

I think this applies to the shading patterns but not to patterns per se.

> If I understand this right, we do write Level 3 Postscript?

Yes, we declare it so at the beginning of the file.

> And is shading implemented in PDF?

I don't know precisely but I would be surprised if this should not be
the case.

        Jörg