[Gmsh] Array interval as argument for Plane Surface holes

[Ricardo Luiz Dalbosco]

Hi Christophe,

Here is the code I'm trying to run:


a = 0.3; //Coil side lenght
kr = 2; //Coil correction factor
nc = 10; //Num,ber of ciol turns
b = kr*a; //Space between coils
lc = a*( kr*(nc - 1) + 1 ) + a; //Air region lenhgt
mesh = 1.0;

x = 0; y = lc/2; z = 0;

//Loop to draw nc squares
For turn In {1:nc}
 //Points
point1 = newp; Point(point1) = {x, y, z, mesh};
point2 = newp; Point(point2) = {x + a, y, z, mesh};
 point3 = newp; Point(point3) = {x + a, y + a, z, mesh};
point4 = newp; Point(point4) = {x, y + a, z, mesh};
 //Lines
line1 = newl; Line(line1) = {point1, point2};
 line2 = newl; Line(line2) = {point2, point3};
line3 = newl; Line(line3) = {point3, point4};
 line4 = newl; Line(line4) = {point4, point1};
 //Plane Surface (newsl = surface loop)
 lineLoop = newsl; Line Loop(lineLoop) = {line1, line2, line3, line4};
 //Lista para criar a Physical Surface
 coilLoops[turn] = lineLoop;
 //Space between turns
 x += b;
EndFor

//Draw a rectangular Air container
x = 0; y = 0; z = 0;
pAir1 = newp; Point(pAir1) = {x - a, y, z, mesh};
pAir2 = newp; Point(pAir2) = {x + lc, y, z, mesh};
pAir3 = newp; Point(pAir3) = {x + lc, y + lc, z, mesh};
pAir4 = newp; Point(pAir4) = {x - a, y + lc, z, mesh};
//lines
lineAir1 = newl; Line(lineAir1) = {pAir1, pAir2};
lineAir2 = newl; Line(lineAir2) = {pAir2, pAir3};
lineAir3 = newl; Line(lineAir3) = {pAir3, pAir4};
lineAir4 = newl; Line(lineAir4) = {pAir4, pAir1};
 //Line Loop
loopAir = newsl;
Line Loop(loopAir) = {lineAir1, lineAir2, lineAir3, lineAir4};
//Plane Surface with coil squares as holes
Plane Surface(loopAir) = {loopAir, coilLoops[1]:coilLoops[nc]};
//Physical Surface
Physical Surface("Air") = {loopAir};

---------

So, the problem seems to be this line:

Plane Surface(loopAir) = {loopAir, coilLoops[1]:coilLoops[nc]};


Also, the code Plane Surface(loopAir) = {coilLoops[1]:coilLoops[nc]}; gives
the same problem.

It works fine when I describe the Plane Surface like this:

Plane Surface(loopAir) = {loopAir, coilLoops[1],
coilLoops[2], coilLoops[3], ..., coilLoops[nc] };


And the syntax  coilLoops[1]:coilLoops[nc], also works describing a
Physical Surface("Coil") = {coilLoops[1]:coilLoops[nc]}.

I am using Gmsh 2.6.1 version.



-- 
Ricardo Luiz Dalbosco      -



On Tue, Jan 8, 2013 at 8:38 AM, Christophe Geuzaine <cgeuzaine at ulg.ac.be>wrote:

>
> Hi Riccardo - Could you send a complete test file? Here this type of
> syntax seems to work just fine:
>
> Point(3) = {0.9, 0.7, 0, 1.0};
> Point(4) = {-0.9, 0.7, 0, 1.0};
> Point(5) = {-0.5, 0.2, 0, 1.0};
> Point(6) = {-0.5, -0.1, 0, 1.0};
> Point(7) = {-0.3, -0.1, 0, 1.0};
> Point(8) = {-0.3, 0.2, 0, 1.0};
> Point(9) = {0.3, 0.2, 0, 1.0};
> Point(10) = {0.3, -0.1, 0, 1.0};
> Point(11) = {0.5, -0.1, 0, 1.0};
> Point(12) = {0.5, 0.2, 0, 1.0};
> Line(1) = {1, 2};
> Line(2) = {2, 3};
> Line(3) = {3, 4};
> Line(4) = {4, 1};
> Line(5) = {6, 7};
> Line(6) = {7, 8};
> Line(7) = {8, 5};
> Line(8) = {5, 6};
> Line(9) = {10, 11};
> Line(10) = {11, 12};
> Line(11) = {12, 9};
> Line(12) = {9, 10};
> Line Loop(13) = {4, 1, 2, 3};
> Line Loop(14) = {8, 5, 6, 7};
> Line Loop(15) = {12, 9, 10, 11};
> hh[] = {14, 15};
> Plane Surface(16) = {13, hh[0]:hh[1]};
>
>
>
> On 07 Jan 2013, at 17:48, Ricardo Luiz Dalbosco <ricardo at dalbosco.net>
> wrote:
>
> > Hi,
> >
> > I'm trying to use an array interval to create holes in a Plane Surface.
> >
> > My script generates dynamically a variable number of squares, wich
> represent coil turns. Those squares are then assembled in Line Loops and
> saved in an array.
> >
> > Then, It's possible to create a Physical Surface like this
> > Physical Surface("Coil") = {loopsCoil[1]:loopsCoil[n]};
> >
> > Where loopsCoil[ ] is the array, and n is the number of turns
> >
> > It happens that the coil is placed inside the Air region. Then, to
> define my Air region I need to specify the Coil as a "hole".
> > But when I try to do this:
> >
> > Plane Surface(airRegion) = {allAirRegion, loopsCoil[1]:loopsCoil[n]}
> >
> > Gmsh simply closes, without an error message.
> > So, it seems I can't define a Plane Surface with the array syntax.
> >
> > Does anyone knows how I can proceed to create the holes in the surface?
> >
> >
> > --
> > Ricardo Luiz Dalbosco      -
> >
> > _______________________________________________
> > gmsh mailing list
> > gmsh at geuz.org
> > http://www.geuz.org/mailman/listinfo/gmsh
>
> --
> Prof. Christophe Geuzaine
> University of Liege, Electrical Engineering and Computer Science
> http://www.montefiore.ulg.ac.be/~geuzaine
>
>
>
>
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