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Usage: n_icons [options]
Creates Sphericon like Polyhedra. Also known as Streptohedra
Options
-h,--help this help message (run 'off_util -H help' for general help)
--version version information
-n <n/d> n-icon of order n. n must be 3 or greater (default: 4)
use d to make star n-icon. d less than n
-t <twst> number of twists. Can be negative, positive or 0 (default: 1)
-s side-cut of even order n-icon (default is point-cut)
-H hybrid of even order n-icon
-a angle (-z 3 only)
-r override inner radius (-z 2 only)
-R override outer radius (-z 2 only)
-z <mthd> construction method
1 - n/d must be co-prime. bow-ties can occur (default for d=1)
2 - n/d compounds allowed. shell model (default for d>1)
3 - n/d compounds allowed. No bow-ties (default if angle not 0)
-M <m,m2> longitudes of model of m sides with optional m2 of m sides showing
m may be odd, 3 or greater if twist is 0 (default: 36,36)
-A place a north and south pole in top and bottom if they exist
only valid if m2<m. Not valid with -c h (-z 1 only)
-c <clse> close open model if m2<m. Valid values h or v (-z 1,2)
h = horizontal closure, v = vertical closure
-x <elms> v, e and f to remove OFF faces with one vertex (vertices),
two-vertices (edges) and three or more vertices (faces)
E - if face is invisble, associated edge is made invisible
-I information on current n-icon
-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)
-f <mthd> mthd is face coloring method. The coloring is done before twist
key word: none - sets no color
S - color by symmetry polygon (default)
s - color by circuits algorithm (n/d must be co-prime)
f - color circuits with flood fill (-z 2,3 any n/d)
c - color by compound
a - color by compound, alternate method
l - color latitudinally
m - color longitudinally
b - checkerboard with first two colors in face color list
n - use each color in succession
x - first two colors based on sign of x
y - first two colors based on sign of y
z - first two colors based on sign of z (z is the twist plane)
o - use first eight colors per xyz octants
-S color circuits symmetrically for coloring method s,f,S (even n)
-T <tran> face transparency. valid range from 0 (invisible) to 255 (opaque)
-O <strg> face transparency pattern string. valid values
0 -T value suppressed, 1 -T value applied (default: '1')
-e <mthd> mthd is edge coloring method. The coloring is done before twist
key word: none - sets no color
key word: Q - defer coloring all edges to option Q (default)
or use the same letter options specified in -f, except c,a
F - color edges with average adjoining face color
-U <tran> edge transparency. valid range from 0 (invisible) to 255 (opaque)
-P <strg> edge transparency pattern string. valid values
0 -U value suppressed, 1 -U value applied (default: '1')
-Q <col> color given to uncolored edges and vertices of final model
key word: none - sets no color (default: invisible)
-Y for n/d shells, when showing edges, show indented edges
-m <maps> color maps to be tried in turn. (default: map_red:darkorange1:
yellow:darkgreen:cyan:blue:magenta:white:grey:black%) optionally
followed by elements to map from v, e or f (default: vef)
-D <c,e> default color c for uncolored elements e (default: darkgrey,ef)
key word: none - sets no color. elements e can include e or f
-X <int> flood fill stop. used with circuit or compound coloring (-f f,c)
use 0 (default) to flood fill entire model. if -X is not 0 then
return 1 from program if entire model has been colored
-W add symmetry polygon (for -f S or -e S)
Surface Count Reporting (options above igonored)
-L <type> list n-icons with more than one surface. Valid values for type
n = point cut even order n_icons
s = side cut even order n-icons (surfaces > 2)
o = odd order n_icons
h = hybrids (all)
i = hybrids (where N/2 is even)
j = hybrids (where N/2 is odd)
k = hybrids (where N/4 is even)
l = hybrids (where N/4 is odd)
-K <k,k2> range of n-icons to list for multiple surfaces
-J long form report
-Z filter out case 2 types
n_icons | antiview
n_icons -s | antiview
n_icons -H | antiview
n_icons -n 20 -t 5 -f s | antiview
n_icons -n 20 -t 5 -f s -m map_red:orange:yellow% | antiview
n_icons -n 20 -t 5 -f s -m map_red:orange:yellow% -T 128 | antiview
n_icons -n 30 -t 5 -f n -m map_white%,f -e s | antiview -e 0.1 -v 0.1
n_icons -n 12/4 -t 2 -f c | antiview
n_icons -n 12/4 -t 2 -f c -z 2 -M 36,27 | antiview
n_icons -n 12/4 -t 2 -f c -z 3 -M 36,27 | antiview
n_icons -L n -K 3,30 -J
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