Samiksha Jaiswal (Editor)

OFF (file format)

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Filename extension
  
.off

Type of format
  
3D model format

OFF (Object File Format) is a geometry definition file format containing the description of the composing polygons of the 3D object.

Contents

Composition

  • first line: number of vertices, number of faces, number of edges (can be ignored)
  • list of vertices: X, Y and Z coordinates
  • list of faces: number of vertices, followed by the sequence number of the composing vertices (indexed from zero)
  • normal of the faces can be determined using the right-hand rule.

    • Example

    OFF # cube.off # A cube 8 6 12 1.0 0.0 1.0 0.0 1.0 1.0 -1.0 0.0 1.0 0.0 -1.0 1.0 1.0 0.0 -1.0 0.0 1.0 -1.0 -1.0 0.0 -1.0 0.0 -1.0 -1.0 4 0 1 2 3 4 7 4 0 3 4 4 5 1 0 4 5 6 2 1 4 3 2 6 7 4 6 5 4 7

    References

    OFF (file format) Wikipedia
    (Text) CC BY-SA