<div dir="ltr">I have a short follow up question on this: Is it possible to get the cylinder walls as a Compound surface, i.e. not divided by the 4 lines that come from the <pi circle arc extrusions? Right I now don't have an idea how to do this...<div><br></div><div>HopeĀ <br><br>On Monday, September 9, 2013 at 5:33:12 PM UTC+2, Sacconi, Andrea wrote:<blockquote class="gmail_quote" style="margin: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;">Hi everybody,
<br>
<br>I have a problem with the Extrude command.
<br>I would like to create a cylindrical mesh, but I need to generate a mesh only on the lateral surface of the cylinder. In other words, I don't want any elements on the two circles, top and bottom.
<br>
<br>I wrote this:
<br>
<br>lc = 0.5;
<br>Point(1) = {-1, 0, 0, lc};
<br>Point(2) = {0, -1, 0, lc};
<br>Point(3) = {1, 0, 0, lc};
<br>Point(4) = {0, 1, 0, lc};
<br>Point(5) = {0, 0, 0, lc};
<br>Circle(1) = {1, 5, 2};
<br>Circle(2) = {2, 5, 3};
<br>Circle(3) = {3, 5, 4};
<br>Circle(4) = {4, 5, 1};
<br>Line Loop(5) = {1, 2, 3, 4};
<br>
<br>geoExtrude[] = Extrude {0, 0, 1} { Line{5}; };
<br>
<br>but I don't get any extrusion. I see only the circle centred at (0, 0, 0) with radius 1.
<br>Is it possible to get the cylinder I need? How would you proceed?
<br>
<br>Thanks in advance for your help!
<br>
<br>Andrea
<br>
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<br>
<br>Andrea Sacconi
<br>PhD student, Applied Mathematics
<br>AMMP Section, Department of Mathematics, Imperial College London,
<br>London SW7 2AZ, UK
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