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E.3 General questions

  1. Gmsh (from a binary distribution) complains about missing libraries.

    On Windows, if your system complains about missing ‘OPENGL32.DLL’ or ‘GLU32.DLL’ libraries, then OpenGL is not properly installed on your machine. You can download OpenGL from Microsoft’s web site, or directly from

    On Unix try ‘ldd gmsh’ (or ‘otool -L gmsh’ on Mac OS X) to check if all the required shared libraries are installed on your system. If not, install them. If it still doesn’t work, recompile Gmsh from the source code.

  2. Gmsh keeps re-displaying its graphics when other windows partially hide the graphical window.

    Disable opaque move in your window manager.

  3. The graphics display very slowly.

    Are you are executing Gmsh from a remote host (via the network) without GLX? You should turn double buffering off (with the ‘-nodb’ command line option).

  4. There is an ugly “ghost triangulation” in the vector PostScript/PDF files generated by Gmsh!

    No, there isn’t. This “ghost triangulation” is due to the fact that most PostScript previewers nowadays antialias the graphic primitives when they display the page on screen. (For example, in gv, you can disable antialising with the ‘State->Antialias’ menu.) You should not see this ghost triangulation in the printed output (on paper).

  5. How can I save GIF, JPEG, ..., images?

    Just choose the appropriate format in ‘File->Save As’. By default Gmsh guesses the format from the file extension, so you can just type ‘myfile.jpg’ in the dialog and Gmsh will automatically create a JPEG image file.

  6. How can I save MPEG, AVI, ..., animations?

    You can create simple MPEG animations by choosing MPEG as the format in ‘File->Save As’: this allows you to loop over time steps or post-processing data sets, or to change parameters according to Print.Parameter. To create fully customized animations or to use different output formats (AVI, MP4, etc.) you should write a script. Have a look at ‘tutorial/t8.geo’ or ‘demos/anim.script’ for some examples.

  7. Can I change values in input fields with the mouse in the GUI?

    Yes: dragging the mouse in a numeric input field slides the value! The left button moves one step per pixel, the middle by ‘10*step’, and the right button by ‘100*step’.

  8. Can I copy messages to the clipboard?

    Yes: selecting the content of an input field, or lines in the message console (‘Tools->Message Console’), copies the selected text to the clipboard.

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