[pstricks] specifying angles by direction vectors

[Herbert Voss]

John Frampton wrote:

> \makeatletter
> \def\ps at dir(#1:#2){#1 #2 }
> \def\ps at dirtoangle{\pst at number\psyunit mul exch
>       \pst at number\psxunit mul atan }
> \def\psset at dirA#1{\edef\psk at angleA{\ps at dir#1\noexpand\ps at dirtoangle}}
> \def\psset at dirB#1{\edef\psk at angleB{\ps at dir#1\noexpand\ps at dirtoangle}}
> \makeatother

it is better to use the xkeyval package. PSTricks has so many
optional arguments, that no one really knows which one are
still defined.

CTAN/macros/latex/contrib/xkeyval/

it provides also a package pst-xkey.tex for the TeX users


Herbert




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