EXTRA: jitterbug - jitterbug transformation

Usage

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
shape.

Options
  -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)

Examples

jitterbug -f e 0.125 | antiview

jitterbug -c i -l 3 0.75 | antiview

Notes

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 

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