<div dir="ltr"><div>Hi Stéphane, Scilab users<br><i></i></div><div><i><br></i></div><div>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!).</div><div><br></div><div>The attached code shows where I am at so far,and a small image of what I would like to get to.</div><div><br></div><div>[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. <br></div><div><br></div><div>Scilab 6.0.1 (64 bit Windows)<br></div><div><br></div><div>Thanks in advance</div><div>Lester<br></div><div><i></i></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 17 June 2018 at 07:47, Stéphane Mottelet <span dir="ltr"><<a href="mailto:stephane.mottelet@utc.fr" target="_blank">stephane.mottelet@utc.fr</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
<br>
In the Plotlib you have an equivalent function :<br>
<br>
<br>
<a href="http://forge.scilab.org/index.php/p/plotlib/source/tree/HEAD/tags/0.46/plotlib/macros/surfnorm.sci" rel="noreferrer" target="_blank">http://forge.scilab.org/index.<wbr>php/p/plotlib/source/tree/<wbr>HEAD/tags/0.46/plotlib/macros/<wbr>surfnorm.sci</a><br>
<br>
S.<br>
<div><div class="h5"><br>
> Le 17 juin 2018 à 00:40, Lester Anderson <<a href="mailto:arctica1963@gmail.com">arctica1963@gmail.com</a>> a écrit :<br>
> <br>
> Hello all,<br>
> <br>
> 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?<br>
> <br>
> 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.<br>
> <br>
> Cheers<br>
> Lester<br>
</div></div>> <Moebius.sce><br>
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