off_sym - Add visual symmetry elements to an OFF file

Usage | Examples | Notes

Usage



Usage: off_sym [options] [input_files]

Add visual symmetry elements to an OFF file as seen in antiview.
Note that any off file viewer must be able to handle invisible elements
invisible is defined as rgba = (0,0,0,0). Elements should be hidden with
off_sys rather than the viewer because the symmetry elements are made of faces

Options
  -h,--help this help message (run 'off_util -H help' for general help)
  --version version information
  -H        Symmetry help and Symmetry Model help (from off_util -H help)
  -x <elms> hide model elements. The element string can include v, e, f or a
            to hide vertices, edges, faces, or a to remove all elements
  -s <syms> show symmetry elements. The element string can include
               x - rotation axes
               m - mirror planes
               r - rotation-reflection planes
               a - all elements (same as xmr)
  -y        align geometry with the standard alignment for a symmetry type,
            up to three comma separated parts: symmetry subgroup (Schoenflies
            notation) or 'full', conjugation type (integer), realignment
            (colon separated list of an integer then decimal numbers)
  -z        restore starting alignment (can undo conjugation alignment)
  -S        scale of symmetry elements for sub-symmetries (default: 1.1)
  -L        list symmetries, with conjugations and realignments
  -o <file> write output to file (default: write to standard output)

Examples

Add all symmetry elements of a Tetrahedron making the model faces invisible

off_sym -s a tet -x f | antiview

Rotate a antiprism and add all the elements of D3v subsymmetry retaining the initial alignment

off_trans -R 10,20,-30 ant12 | off_sym -s a -y D3v -z | antiview

Notes

off_sym was developed by Roger Kaufman, based on code by Adrian Rossiter

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