On Sat, Jan 18, 2025 at 08:09:56PM +0100, onf wrote:
> By the way, the way gpic does it is by emitting PostScript instructions
> to the grops postprocessor. See gropdf(1):
>   gropdf understands some of the device control commands supported by
>   grops(1).
> 
>   \X'ps: exec gsave currentpoint 2 copy translate n rotate neg exch
>   neg exch translate'
>     where n is the angle of rotation.  This is to support the align
>     command in pic(1).
> 
>   \X'ps: exec grestore'
>     Used by pic(1) to restore state after rotation.
> 
> Tadziu Hoffman's approach is using these exact commands as well.

Good tip!  I'm feeling masochistic lately, so I'm going to try to learn
some postscript!  Thanks a lot for answering!

-- 
Walter

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