Hu Fangjing wrote:
Dear Sir:

As far as I know, .geo file could not support curve surface, so many
of my models could not be imported into gmsh correctly. I wanna know
if GMSH can mesh the .STEP file or IGES file directly? And how to

You should never "translate" your models into .geo format: to load a .step or an .iges file just open it... that's it.

control the Characteristic Length in a IGES file?


The same way as for other models: all the mesh size functions are available for all model types. To use the geo-type scripting commands on a .step file, you can e.g. write a .geo file that contains

  Merge "file.step";
  // geo scripting command here...



Kind regards.

Fangjing

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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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