[Scilab-users] Punch a hole into a facet

[Jens Simon Strom]

Thanks Samuel,
%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)
I have to assemble my facet with several windos from partially 
overlapping rectangles

Cheers
Jens

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Am 01.10.2018 08:28, schrieb Samuel Gougeon:
> Hello Jens,
>
> %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.
>
> HTH
> Samuel
>
>
> Le 30/09/2018 à 23:35, Jens Simon Strom a écrit :
>> Hallo Scilab friends,
>> Is there a way to punch a*peak through* hole into a rectangle?
>>
>> The result below  looks like a hole but it is just white 
>> intransparent color.
>> xdel();
>> xf=[1;-1;-1;1];  yf=[1;1;-1;-1];  zf=[0;0;0;0];      
>> plot3d(xf,yf,list(zf,5))//Facet
>>    ce=gce();  ce.hiddencolor  =  5;
>> xf=0.5*[1;-1;-1;1];  yf=0.5*[1;1;-1;-1];  zf=[0;0;0;0];
>> plot3d(xf,yf,list(zf,8))//Hole
>>    ce=gce();  ce.hiddencolor  =  8;
>>
>> Cheers
>>
>> Jens
>>
>>
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