> On 8 Dec 2017, at 16:24, Nico Schlömer <[email protected]> wrote:
>
> Hi everyone,
>
> When combining two domains using an opencascade union, the seams will still
> be respected by the mesher. As an example, check out the geometry of a union
> of two overlapping circles:
> ```
> SetFactory("OpenCASCADE");
> s0 = news;
> Disk(s0) = {-5.0, 0.0, 0.0, 10.0};
> s1 = news;
> Disk(s1) = {5.0, 0.0, 0.0, 10.0};
> bo1[] = BooleanUnion{Surface {s0}; Delete;} {Surface {s1}; Delete;};
> ```
> After the meshing process, the outlines of both circles are still
> recognizable.
>
> Is it possible to give the mesher the freedom to disregard the outlines?
>
With the latest snapshots, do:
SetFactory("OpenCASCADE");
s0 = news;
Disk(s0) = {-5.0, 0.0, 0.0, 10.0};
s1 = news;
Disk(s1) = {5.0, 0.0, 0.0, 10.0};
bo1() = BooleanUnion{Surface {s0}; Delete;} {Surface {s1}; Delete;};
Compound Surface{bo1()};
Note that this relies on the new Compound implementation, which will still
undergo major changes until it is released in Gmsh 3.1 or Gmsh 4.0, hopefully
early next year.
Christophe
PS: have a look at the new Python API (see demos/api/*.py), which you might
find useful.
> Cheers,
> Nico
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--
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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