[pstricks] suggestion for pst-3dplot

[Markus]

Dear Herbert!

The suggested 3d-2d conversion causes pictures to be too large.

Scaling it by 0.5

(0 | 0 | 0 ) mapsto (0 | 0 )
(1 | 0 | 0 ) mapsto (-0.5 | -0.5)
(0 | 1 | 0 ) mapsto (1 | -0.25)
(0 | 0 | 1 ) mapsto (0 | 1)

and changing code to

     coorType 4 le { % Normalbild in Trimetrie %% 
Skalierung so, dass Größe wie üblich bei coorType=2
       /x2D x -0.5 mul y 1 mul add def
       /y2D x -0.5 mul y -0.25 mul add z 1 mul add def
       exit } if

I've tested some of my files -- all working fine (includig parametricplols).

There is a problem with a sphere.

Kind regards

Markus





At 00:07 13.12.2008, you wrote:
>Markus schrieb:
>
> > I have a suggestion for pst-3dplot:
> >
> > Add a coordinate Type c0orType=4 (Trimetrie) defined by following
> > code (out of pst-3dplot.pro)
> >
> >      coorType 4 le { % coorType |/_ with a 1/sqrt(2) shortend x-axis
> > and 135 degrees
> >        /x2D x -1 mul 2 y mul add z 0 mul add  def %% z 0 mul --> not
> > really useful
> >        /y2D x -1 mul -0.5 y mul add z 2 mul add def
> >        exit } if
>
>from my point of view the 3d-2d conversion wrong. However,
>can you explain the conversion or show me a link?
>
>Herbert
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