OFF (DEC-WSE Object File Format)

OFF (Object File Format) is a scene description language originally developed by Randi J. Rost at Digital Equipment Corporation's Workstations Systems Engineering.

The format, or some subset or extension of it, is probably also known as OOGL Geom or Geomview format.

As originally specified
There is both a binary (.off) and a text (.aoff) version of the format.

An OFF "file" can actually be a collection of files, consisting of a main .off or .aoff file, and other files referenced by it. The conventional filename extensions for these other files are .geom, .bgeom, .pcol, .bpcol, .vcol, .bpcol, .vcol, .bvcol, .ipcol, .bipcol, .ivcol, .bivcol, .pnorm, .bpnorm, .vnorm, and .bvnorm.

As observed
Text files representing individual objects may use the .off extension, instead of, say, .geom.

Identification
Some text files begin with the ASCII signature "OFF", but this is optional and not always present.

An .aoff file has lines that begin with keywords such as "name", "author", "description", "type", "geometry", etc.

Specifications

 * OFF specification (dated 1989-10-12)
 * OFF specification Same as above, formatted differently
 * http://paulbourke.net/dataformats/off/
 * http://www.holmes3d.net/graphics/offfiles/offdesc.txt

Software

 * Geomview
 * off-1.0-src-11.00.tar.gz

Sample files

 * off-1.0-src-11.00.tar.gz → off-1.0/objects/
 * http://www.holmes3d.net/graphics/offfiles/
 * http://people.sc.fsu.edu/~jburkardt/data/off/off.html

Links

 * OFF File Format Summary, from the Encyclopedia of Graphics File Formats