Hi,
I would like to express my gratitude for implementation of the new
OpenCASCADE geometry kernel, it is really useful and make many things
much easier.
Do you have any update with respect to boolean operation and physical
surface labels? It would be very useful, if physical surface labels
could be kept for surface part which is not modified, while the newly
created surface could inherit the label from the tool object.
If this feature is still not implemented, could there be some workaround
to, for example, track surface labels, as cube is subtracted form
another cube?
Best,
Ugis
On 15/04/17 20:03, Christophe Geuzaine wrote:
Hi Andrew,
It's not yet implemented, but it's clearly on our TODO list. (Currently we
already preserve the tags of the highest-dimensional entities whenever
possible: cf. demos/boolean/fragments_numbering.geo.)
Christophe
On 15 Apr 2017, at 19:39, andrew <[email protected]> wrote:
Hi,
The new gmsh 3 is great with the Boolean additions!.
I would like to ask if there is a way to preserve the labeling of the physical
surfaces of the objects and the tool objects before the Boolean operation and
pass them to the new objects after the Boolean operation.
For example in the following geo file there is a main object (b1[]) from
extrusion and 3 tool objects (b2[],b3[],b4[]) created from extrusion.
From these objects I define two physical surfaces (b1[2]=out - plane 5
/b2[3]=inside - plane 11). If I perform a Boolean operation with them I lose
the out/inside names and since the numbering of the surfaces changes from the
creation of new objects I can't find the inside/out labels any more. Is there a
way to preserve the names from the old objects and pass them to the new object?
For example the newly created surfaces (plane 40 - plane 25) in the new object
that were part of the out surface before could be preserved.
Something like: Physical Surface("new_out")=FromOld("out") that could assing to the
surfaces 40 & 25 the tag 'out' from the surface 5 since these two were created from the breaking of
surface 5.
kind regards
Andrew Tsiantis
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