Hi Christophe,
thanks for clarifying, I've found that I can solve the problem by doing first
translate/rotate and then extrude.
Regards,
Marco
Il venerdì 20 dicembre 2019, 08:27:44 CET, Christophe Geuzaine
<[email protected]> ha scritto:
> On 19 Dec 2019, at 21:24, Marco Antolovic <[email protected]> wrote:
>
> Hi all,
>
> I have noticed a strange behavior for layered extrusion. It appears that if
> you first extrude a point to line and then operate a translation on the line
> than the layering is lost:
>
That's currently (unfortunately) normal. Extruded meshes rely on the fact that
the mesher knows how the geometry was constructed: currently as soon as a
geometrical entity is modified, we assume that this relationship is lost.
We should handle translations and other simple transforms and modify the
extrusion functions accordingly - but that's in the TODO list. Don't hesitate
to contribute a patch if this is critical for your workflow.
Christophe
> my GMSH version is version 4.5.0-git-a2a0ecd on a Mac
>
> below is my code:
>
> SetFactory("OpenCASCADE");
>
> trace_width = DefineNumber[ 1, Min .01, Max 1000, Step .01, Name " Track
> parameters/trace width (mm)" ];
> trace_width = trace_width/1000;
>
> trace_thickness = DefineNumber[ 1, Min .01, Max 1000, Step .01, Name " Track
> parameters/trace thickness (mm)" ];
> trace_thickness = trace_thickness/1000;
>
> trace_start_right = newp;
> Point(trace_start_right) = {0, 0, -trace_thickness/2, trace_width};
> extrude_point = Extrude {-trace_width, 0, 0}{ Point{trace_start_right};
> Layers { 3 };};
> trace_width_line = extrude_point(1);
> Translate { -.1, .1, 0 } { Line{trace_width_line}; } // this operation voids
> the Layers{3} request
>
> Is this normal?
>
> Many thanks,
>
> Marco
>
>
>
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—
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine
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