[Scilab-users] Compute normals to 3D surface

[Lester Anderson]

Hi Stéphane, Scilab users

Thanks for the information. I retrieved the surfnorm function, and the
associated functions that it called internally. I still cannot figure out
how it should work with the existing code;had to add the functions into the
main sce file to get it doing something (not sure why!).

The attached code shows where I am at so far,and a small image of what I
would like to get to.

[x1,y1,z1] = surfnorm(x,y,z) does generate value,but plot3d does not give a
meaningful result.Perhaps I am missing something very obvious, so any
pointers are great.

Scilab 6.0.1 (64 bit Windows)

Thanks in advance
Lester

On 17 June 2018 at 07:47, Stéphane Mottelet <stephane.mottelet at utc.fr>
wrote:

> Hello,
>
> In the Plotlib you have an equivalent function :
>
>
> http://forge.scilab.org/index.php/p/plotlib/source/tree/
> HEAD/tags/0.46/plotlib/macros/surfnorm.sci
>
> S.
>
> > Le 17 juin 2018 à 00:40, Lester Anderson <arctica1963 at gmail.com> a
> écrit :
> >
> > Hello all,
> >
> > I was wondering if it was possible to compute and visualise the normals
> to a 3D surface in Scilab? I think Matlab has something called surfnorm;is
> there something similar for Scilab?
> >
> > I have attached the basic code for the Moebius strip, and it would be
> useful to showwhat happens to the normals at say z=0, but not sure how one
> would go about this. Perhaps this has already been solved.
> >
> > Cheers
> > Lester
> > <Moebius.sce>
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