0
$\begingroup$

I have many STL files and I want to reduce their size, so I use Gmsh in this way:

gmsh -2 -bin -format vtk -o file.vtk file.stl -0

It reduces the size from 7 MB to 1.2 MB, but if I use the option "Recombine 2D" the size is reduced to 800 KB. I cannot find a way to use recombine in the command line, so I try with the next script file:

Merge "malla.stl";
Recombine Surface {1};

But it doesn't work. The only way that works Recombine 2D is in the graphical interface. How can I automate the command "Recombine 2D"?

Improve this question
$\endgroup$

1 Answer 1

Reset to default
1
$\begingroup$

Recombine Surface{1} - recombines only the triangles for the surface #1.

To allow recombination of all the surfaces, you need either Mesh.RecombineAll=1 or Recombine Surface {:};. Those commands will perform it on all the surfaces.

However, I find it a bit strange that you are using Recombine commands for that purpose. They are usually used to create a structured rectangular/quad mesh in certain regions of the model rather than reduce file size.

Improve this answer
$\endgroup$
1
  • $\begingroup$ Thanks, but it doesn't work. I try also try with ´Recombine Surface {:}´ and I get the same results. I understand that ´Recombine´ is used to crate structured rectangular mesh,but in this way I can reduce the file size too. I just need these STL to post-process, the calculations are already done. $\endgroup$
    – xpt
    Jan 11, 2019 at 14:06

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.