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EXTRA: jitterbug - jitterbug transformation

Usage    |    Examples    |    Notes


Usage: jitterbug [options] [cycle_stage]

Create a stage of the jitterbug transformation in OFF format. The
cycles run from 0.0 to 1.0. The fractional part of cycle_stage
is tied to a stage in a full rotation jitterbug. This stage is
measured by the distance travelled by a point moving around a square
which halves a cube of edge 0.25, and which determines the jitterbug

  -h,--help this help message (run 'off_util -H help' for general help)
  --version version information
  -f <fces> faces to includ
              x - none
              a - all
              e - equilateral triangles (default)
              o - other triangles
  -c <cyc>  cycle type:
              f - full rotation
              o - alternating between left and right octahedron stages
              r - rolling between left and right octahedron stages
              i - alternating between left and right icosahedron stages
  -l <size> lattice size, nummber of jitterbugs along an edge (default 1)
  -r        allow lattice reversal by fixing connections between
            jitterbug neighbours
  -t        fix an opposing pair of triangles, stopping them from rotating
  -T        rotate so equilateral triangle is on top (suports -t)
  -o <file> write output to file (default: write to standard output)


Octahedron stage of full jitterbug, include only the equilateral triangles
jitterbug -f e 0.125 | antiview

Icosahedron stage of icosahedron cycle jitterbug, in 3x3x3 lattice
jitterbug -c i -l 3 0.75 | antiview


The models are based on R. Buckminster Fuller's jitterbug transformation.

The equilateral faces are given colour index 1, and the other faces have colour index 2. The faces can easily be given colour values using the off_color program. E.g.

   jitterbug -c i -l 3 0.75 | off_color -f M -m map_1=black:2=white | antiview 

     Next: EXTRA: lat_grid - lattices and grids with integer coordinates
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Contact:      -      Modified 27.5.2023