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    Thanks Samuel,<br>
    %nan works with surf, not with plot3d. The latter is attractive
    because it can handle polygons - but unfortunately  not those with
    embayments:  Facet coloring exeeds the contour (Vers. 5.5.2)<br>
    I have to assemble my facet with several windos from partially
    overlapping rectangles <br>
    <br>
    Cheers<br>
    Jens<br>
    <br>
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    <div class="moz-cite-prefix">Am 01.10.2018 08:28, schrieb Samuel
      Gougeon:<br>
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    <blockquote cite="mid:da877802-c901-029d-7e2f-1c4a615b7e4b@free.fr"
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      <div class="moz-cite-prefix">Hello Jens,<br>
        <br>
        %nan are often used to do so: As soon as at least one coordinate
        of a vertex is equal to %nan, the vertex and all lines and
        facets going through it are skipped/not rendered.<br>
        <br>
        HTH<br>
        Samuel<br>
        <br>
        <br>
        Le 30/09/2018 à 23:35, Jens Simon Strom a écrit :<br>
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      <blockquote cite="mid:5BB141B8.1060505@hslmg.de" type="cite">
        Hallo Scilab friends,<br>
        Is there a way to punch a<b> peak through</b> hole into a
        rectangle?<br>
        <br>
        The result below  looks like a hole but it is just white
        intransparent color. <br>
        <pre><span>xdel</span><span>(</span><span>)</span><span>;</span>
<span>xf</span><span>=</span><span></span><span>[</span><span>1</span><span>;</span><span>-</span><span>1</span><span>;</span><span>-</span><span>1</span><span>;</span><span>1</span><span>]</span><span>;</span> <span>yf</span><span>=</span><span></span><span>[</span><span>1</span><span>;</span><span>1</span><span>;</span><span>-</span><span>1</span><span>;</span><span>-</span><span>1</span><span>]</span><span>;</span> <span>zf</span><span>=</span><span>[</span><span>0</span><span>;</span><span>0</span><span>;</span><span>0</span><span>;</span><span>0</span><span>]</span><span>;</span>     
<span>plot3d</span><span>(</span><span>xf</span><span>,</span><span>yf</span><span>,</span><span>list</span><span>(</span><span>zf</span><span>,</span><span>5</span><span>)</span><span>)</span><span>//Facet</span>
  <span>ce</span><span>=</span><span>gce</span><span>(</span><span>)</span><span>;</span> <span>ce</span><span>.</span><span>hiddencolor</span> <span>=</span> <span>5</span><span>;</span>
<span>xf</span><span>=</span><span>0.5</span><span>*</span><span>[</span><span>1</span><span>;</span><span>-</span><span>1</span><span>;</span><span>-</span><span>1</span><span>;</span><span>1</span><span>]</span><span>;</span> <span>yf</span><span>=</span><span>0.5</span><span>*</span><span>[</span><span>1</span><span>;<span>1</span><span>;</span><span>-</span><span>1</span><span>;</span><span>-</span><span>1</span><span>]</span><span>;</span> <span>zf</span><span>=</span><span>[</span><span>0</span><span>;</span><span>0</span><span>;</span><span>0</span><span>;</span><span>0</span><span>]</span><span>;</span>
<span>plot3d</span><span>(</span><span>xf</span><span>,</span><span>yf</span><span>,</span><span>list</span><span>(</span><span>zf</span><span>,</span><span>8</span><span>)</span><span>)</span><span>//Hole</span>
  <span>ce</span><span>=</span><span>gce</span><span>(</span><span>)</span><span>;</span> <span>ce</span><span>.</span><span>hiddencolor</span> <span>=</span> <span>8</span><span>;

Cheers

Jens
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