off_align - alignment of OFF files
Usage: off_align [options] [input_file]
Read a base file and brick file in OFF format, and use vertices or faces
to position the brick with respect to the base. The brick may be repeated
symmetrically and/or merged with the base. If input_file is not given the
program reads from standard input.
-h,--help this help message (run 'off_util -H help' for general help)
--version version information
-v <arg> align by vertices, iarg is a comma separated list of a brick
geometry (if empty use base) optionally followed by 'r' (reverse
brick orientation) followed by two, four or six points given as
the vertex index number in the OFF files (starting at 0). The base
points are all given first and then the brick points.
u1,v1 - point alignment
translation u1-v1 (so v1 of brick moves to u1 of base)
u1,u2,v1,v2 - line alignment
point alignment as above followed by rotation through
u1 perpendicular to u1u2 and v1v2 to align u1u2 and v1v2.
u1,u2,u3,v1,v2,v3 - face alignment
line alignment as above followed by a rotation
around u1,u2 so v3 lies in plane of u1u2u3.
-f <arg> align by face index, arg is a comma separated list of a brick
geometry (if empty use base) followed by up to three numbers
separated by commas: base face index, brick face index
(default: 0), polygon alignment selection number (default: 0)
-F <arg> align and combine polyhedra by face index, arg is a comma
separated list of a brick geometry (if empty use base) followed
by up to three numbers: base face index, brick face index
(default: 0), polygon alignment selection number (default: 0).
Brick is after base, bond vertices are merged, bond faces are
-M <val> merge files. 0 (default) don't merge, 1 brick after
base, 2 brick before base
-y <sub> repeat bricks according to symmetry of base. sub is symmetry
subgroup (Schoenflies notation) or 'full' optionally followed
by a ',' and conjugation type (integer)
-o <file> write output to file (default: write to standard output)
Bond vertices 4, 5 and 6 of poly1.off to the first three vertices of
poly2.off and write them into a single file in order poly1 then poly2.
off_align -M 2 -p 0,1,2,4,5,6 -b poly1.off poly2.off
Augment face 1 of an icosahedron, making a polyhedron with 22 faces
off_align -F 1 -b tet icosa
This can be used to build larger structures using polyhedra
When using -F the specified faces are deleted from the
output. Faces in the base polyhderon that come after the bonding
face will have their index numbers decreased by one in the output.
off_util - utilities for OFF files
Programs and Documentation