# [pstricks] Re: Right-handed coordinates in pst-3dplot

Joel Salomon joelcsalomon at gmail.com
Wed Jan 11 13:19:20 CET 2006

On 1/11/06, Herbert Voss <LaTeX at zedat.fu-berlin.de> wrote:
> The only problem is, that you need to negate the x values by yourself.

That's the rub exactly.

In terms of the matrix in tb72voss3d.pdf
(texmf/doc/generic/pst-3dplot/doc/tb72voss3d.pdf in my MiKTeX
installation), equations 2 & 3 (x_E = −x \cos\alpha + y \sin\alpha),
an option "LeftHanded" could potentially negate the value.  If there's
ever a request for left-handed coordinates, it should be simple to
implement.

Perspective, on the other hand… ;)

--Joel