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Usage: off_normals [options] [input_file] Display normals of faces, implicit edges, and vertices If input_file is not given the program reads from standard input. Options -h,--help this help message (run 'off_util -H help' for general help) --version version information -t <opt> normal type. a - added to element, p - positional (default: a) -u unit normals (raw normals otherwise) -e connect to element centroid (default for -t a) -m <num> connector length adjust (for -t a, greater than zero, default: 1.0) -p <opt> force polarity. o - set all outward, i - set all inward r - reverse both inward and outward -i <elms> include normals. The element string can include o, i and h to show, respectively, outward, inward and hemispherical note: exlusion occurs before -p (default: oih) -s <elms> include elements. The element string can include v, e and f to show, respectively, vertices, edges and faces (default: f) -d <opt> delete elements. f - delete faces of unincluded normals a - delete all of original model -c <opts> average pattern string for edge and vertex normals. Done before -p r - raw, o - outward, i - inward, u - unit (default: r) -a alternate calculation for vertex normals -C <xyz> center of model, in form 'X,Y,Z' (default: centroid) -l <lim> minimum distance for unique vertex locations as negative exponent (default: 12 giving 1e-12) -o <file> write output to file (default: write to standard output) Coloring Options (run 'off_util -H color' for help on color formats) -O <col> outward normal vertex color -I <col> inward normal vertex color default: vertex color is negative of outward col -H <col> hemispherical normal vertex color (default: gray50) -E <col> normal vector color. connected to element centroid default: color of normal vertex -B <col> normal vector base color. color at element centroid key word: b take color of element (default) key word: n take color of normal vertex
off_normals rt -O white | antiview -v 0.075
planar -O n rt | off_normals -O white -d f | antiview -v 0.075 -x f
off_normals icosidodecahedron -s e -O white | antiview -v 0.075
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