[pstricks] AlgParser inside raw coordinates (! PS code)

[Christophe Jorssen]

Le mercredi 30 avril 2008 à 23:02 +0200, Christophe Jorssen a écrit :
> Le mercredi 30 avril 2008 à 21:27 +0200, Herbert Voss a écrit :
> > Christophe Jorssen schrieb:
> > 
> > > I don't understand why I get a postscript error with the felowing code.
> > > (expression) AlgParser cvx doesn't seem to put a number on the stack.
> > > Maybe I misunderstand something.
> > > 
> [snip]
> > 
> > cvx make it _executable_, but does not execute it
> > 
> >    \psdot[linecolor=blue](!
> >      /X \lpar4*cos\lpar45\rpar\rpar\space AlgParser cvx def
> >      /Y \lpar4*sin\lpar45\rpar\rpar\space AlgParser cvx def
> >      X Y)%
> > 
> > 
> >    \psdot[linecolor=red](*{Pi 4 div} {sin(x)})
> > 
> > works also with the latest pstricks.
> > 
> 
> ok, got it. Thank you Herbert and Manuel. 
> 
> Is there a way to do the same without any def's (that is execute
> something excutable on the stack) ?

Yes... See the red book (p 55): the exec keyword.

\listfiles
\documentclass{article}
\usepackage{pstricks,pst-func}
\begin{document}
\SpecialCoor
\def\lpar{(}
\def\rpar{)}
\begin{pspicture}[showgrid=true](5,5)
  \psdot(!5 45 cos mul 5 45 sin mul)
  \psdot(!
    \lpar 5*cos\lpar 45\rpar\rpar\space AlgParser cvx exec 
    \lpar 5*sin\lpar 45\rpar\rpar\space AlgParser cvx exec)
\end{pspicture}
\end{document}

--
Christophe