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jitterbug - jitterbug transformation
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 used
to determine the 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.
- cycle_stage
- A number from 0.0 to 1.0 specifying how far through the jittrerbug cycle
- -h
- program help
- -f <faces>
- faces to include:
- x - none
- a - all
- e - equilateral triangles (default)
- o - other triangles
- -c <cycle>
- cycle type:
- f - full rotation
- o - alternating between left and_ang(cyc_val) 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, if this option is not used
the program writes to standard output
Octahedron stage of full jitterbug, include only the equilateral triangles
jitterbug -f e 0.125 > jb_oct.off
Icosahedron stage of icosahedron cycle jitterbug, in 3x3x3 lattice
jitterbug -c i -l 3 0.75 > jb_ico.off
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 -c 2 > jb_ico_col.off
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Packinon Documentation 7.9.2006 -
http://packinon.sourceforge.net/