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off_trans - transformations (rotations, etc) of OFF files

Usage

Synopsis

Description

Options

input_file

input file in OFF format, or if not given the program reads from stdin

-h

program help

-T <tran>

translation, three numbers separated by commas which are used as the x, y and z displacements

-R <rot>

rotation about an axis, four numbers separated by commas. The first three numbers are a direction vector for the axis, the last number is the angle to rotate (in degrees)

-M <norm>

reflection in a plane, three numbers separated by commas which give a vector normal to the plane of reflection.

-S <scal>

scale, one, three or four numbers separated by commas. If one number then scale by this factor in all directions. If three numbers these are the factors to scale along the x, y and z axes. If four numbers, the first three are a direction vector for the scaling, the last number is the factor to scale

-I

invert (equivalent to -S -1)

-X <mtrx>

transformation matrix of 9 or 12 values, given left-to-right top-to-bottom, used to premultipy each coordinate

-s <type>

Relative scaling. Scale so a measure has a value of 1. This option is applied last after any other transformations. VwAa need an oriented polyhedron, Vw need a closed polyhedron.

• V - volume
• A - area
• a - average face area
• E - perimeter (sum of edges)
• e - average edge length

-o <file>

write output to file, if this option is not used the program writes to standard output

Examples

   off_trans -T -1,-1,0 -o cube_a.off cube.off
   off_trans -R 0,0,1,45 -o cube_b.off cube_a.off
   off_trans -T 1,1,0 -o final_cube.off cubeb.off

   off_trans -T 1,1,0 -R 0,0,1,45 -T 1,1,0 -o final_cube.off cube.off

Notes

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Next: off_align - alignment of OFF files