# [Gmsh] Maybe a stupid question, but...

Alexis Blasselle alexis.blasselle at gmail.com
Mon Mar 1 16:57:14 CET 2010

```I'm sorry but I'm new at gmsh, and I can't understand why this code is not
correct.
I want to generate cylinders and make them rotate (to obtain six cylinders).
I hope it is not a stupid mistake of mine, and thank you in advance for your

Best regards,

Miss Blasselle

// the code

lc1 = 0.05 ;
R = 0.5;
H = 3 ;

Point(100) = {0., 0., 0., lc1};
// premier cercle
Point(1) = {  0. ,  0. , -H/2 , lc1  } ;
Point(2) = {  R  ,  0. , -H/2 , lc1  } ;
Point(3) = {  0. ,  R  , -H/2. , lc1  } ;
Point(4) = { -R  ,  0. , -H/2 , lc1  } ;
Point(5) = {  0. , -R  , -H/2 , lc1  } ;

Circle(23) = { 2 , 1 , 3 } ;
Circle(34) = { 3 , 1 , 4 } ;
Circle(45) = { 4 , 1 , 5 } ;
Circle(52) = { 5 , 1 , 2 } ;

Line Loop (1) = {23, 34, 45, 52 };

Plane Surface (11) = {-1};

tmp[] = Extrude {0,0,-H} {
Surface{11}; };

//out[] = Duplicata{tmp[0];};

Rotate{ {0,1,0}, {0,0,0}, Pi/2 }{ Duplicata{tmp[0];} };

--
http://www.ann.jussieu.fr/~blasselle/
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