[Scilab-users] Punch a hole into a facet

[Jens Simon Strom]

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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