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Subject: Re: [geda-user] rotate a component 45 degrees in PCB ?
From: Stefan Salewski <mail AT ssalewski DOT de>
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Date: Wed, 31 Jul 2013 23:28:35 +0200
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On Wed, 2013-07-31 at 10:05 -0500, Edward Hennessy wrote:
> I would find that helpful too. For example, drawing the emitter line
> and arrow of the transistor on the orthogonal axis, and then rotating
> the objects into the final position.
> 
> Or, it would be valuable if gschem could add an arrow to the end of an
> arbitrary line.
> 

A 45 degree line is always trivial to draw -- make a horizontal and a
vertical one of same length, and connect the ends diagonal. For other
odd angles the result looks not always perfect, when you rotate a line,
because of the limited resolution of the screen. When I have drawn short
arrow, I have built my odd lines by patterns like: go two pixel to the
right and one down, and repeat that as many times as necessary. Getting
such a symmetric result by rotating lines works not always well.

Text rotated by arbitrary angle should be fine, and basically very easy
due to cairo.