[Gmsh] extrude OpenCASCADE Boolean union doesn't work

[Nico Schlömer]

> "bo1()" (or "bo1[]", parentheses and square brackets can both be used

Ah, I didn't even know that. The fact that `foo[]` refers to the list and
`foo` to its first element gets me every time.

Cheers,
Nico

On Wed, Sep 27, 2017 at 2:18 PM Christophe Geuzaine <cgeuzaine at ulg.ac.be>
wrote:

>
>
> > On 27 Sep 2017, at 14:09, Nico Schlömer <nico.schloemer at gmail.com>
> wrote:
> >
> > > ex1[] = Extrude{0,0,1}{Surface{bo1()};};
> >
> > As a general rule, do OpenCASCADE entities always only work with round
> brackets?
> >
>
> No, it's just that "bo1()" is a list: "bo1" refers to the first element in
> the list; "bo1()" (or "bo1[]", parentheses and square brackets can both be
> used - I tend to prefer parentheses) returns the full list.
>
> > Cheers,
> > Nico
> >
> > On Wed, Sep 27, 2017 at 2:07 PM Christophe Geuzaine <cgeuzaine at ulg.ac.be>
> wrote:
> >
> >
> > > On 27 Sep 2017, at 14:03, Nico Schlömer <nico.schloemer at gmail.com>
> wrote:
> > >
> > > Hi everyone,
> > >
> > > The following code forms a union of a rectangle and two disks, and
> aims to extrude the resulting shape.
> > > ```
> > > SetFactory("OpenCASCADE");
> > >
> > > Mesh.CharacteristicLengthMin = 0.1;
> > > Mesh.CharacteristicLengthMax = 0.1;
> > >
> > > s0 = news;
> > > Rectangle(s0) = {-1.0, -1.0, 0.0, 2.0, 2.0};
> > >
> > > s1 = news;
> > > Disk(s1) = {-1.0, 0.0, 0.0, 0.5};
> > >
> > > s2 = news;
> > > Disk(s2) = {1.0, 0.0, 0.0, 0.5};
> > >
> > > bo1[] = BooleanUnion{Surface {s0}; Delete;} {Surface {s1,s2}; Delete;};
> > >
> > > ex1[] = Extrude{0,0,1}{Surface{bo1};};
> > > ```
> > > However, it appears that only the _difference_ between the rectangle
> and the disks is extruded.
> > >
> > > Any idea what's going on?
> >
> > The last line should be
> >
> > ex1[] = Extrude{0,0,1}{Surface{bo1()};};
> >
> >
> > >
> > > Cheers,
> > > Nico
> > > _______________________________________________
> > > gmsh mailing list
> > > gmsh at onelab.info
> > > http://onelab.info/mailman/listinfo/gmsh
> >
> > --
> > Prof. Christophe Geuzaine
> > University of Liege, Electrical Engineering and Computer Science
> > http://www.montefiore.ulg.ac.be/~geuzaine
> >
> > Free software: http://gmsh.info | http://getdp.info | http://onelab.info
> >
>
> --
> Prof. Christophe Geuzaine
> University of Liege, Electrical Engineering and Computer Science
> http://www.montefiore.ulg.ac.be/~geuzaine
>
> Free software: http://gmsh.info | http://getdp.info | http://onelab.info
>
>
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