# [Gmsh] gmsh fails to create points inside a loop

**Eric Nutsch**
ericnutsch at gmail.com

*Wed Jun 2 05:07:48 CEST 2010*

Though I havent had time to review your code explicitly, I know one
possible stumble...
Gmsh can not create two points at the exact same point in space(in
addition to not having the same identifier). This is a likely mistake
when using loops, and I find myself running into that problem
frequently.
Hope that helps,
Eric
On Tue, Jun 1, 2010 at 8:44 AM, jean pierre aubry
<jeanpierre at lamachine.fr> wrote:
>* hello
*>*
*>* i have the following loop to create an axis symetric struture
*>*
*>*
*>* For i In {0:num:pas}
*>*
*>* .........................
*>* Point(10000*i
*>* +100538)={-5800*Cos(a*i)-(0*Sin(a*i)),-5800*Sin(a*i)+(0*Cos(a*i)),6060,e};
*>*
*>* Point(10000*i
*>* +100701)={-4435*Cos(a*i)-(30*Sin(a*i)),-4435*Sin(a*i)+(30*Cos(a*i)),8766,e};
*>* Point(10000*i
*>* +100702)={-4435*Cos(a*i)-(-30*Sin(a*i)),-4435*Sin(a*i)+(-30*Cos(a*i)),8766,e};
*>*
*>* ..........................
*>*
*>* EndFor
*>*
*>* for i =0 all 3 points are created
*>*
*>* for the next st ps the point Point(10000*i+100701) is not created
*>*
*>* and this happens at a few other places within the loop which contains
*>* about 150 point to be repeated 16 times
*>*
*>* the point can however be created outside of the loop with the same
*>* parameter
*>*
*>* any idea of what's happening
*>*
*>* i wnat to create a structure similar to this one which was created with
*>* gmsh, many thanks!!
*>*
*>* http://www.code-aster.org/V2/spip.php?article298
*>*
*>* but much more complicated and largelly parametric
*>*
*>*
*>*
*>*
*>*
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