iv Format:

The OpenInventor format is complex.  However, you only need to know
the following for your assignments:

The file should begin with the lines

#Inventor V2.0 ascii

Material {
  ambientColor  0.09 0.04 0.04
  diffuseColor  0.9 0.4 0.4
  specularColor  0.3 0.3 0.3
  shininess 0.2
  transparency   0
}


Next, you specify the tesselation of each face as

Separator {
  Coordinate3 {
    point   [
      1 0 0,
      0 1 0,
      0 0 1,
      -1 0 0,
      0 -1 0,
      0 0 -1 
    ]
  }
  Normal {
    vector  [
      1 0 0,
      0 1 0,
      0 0 1,
      -1 0 0,
      0 -1 0,
      0 0 -1 
    ]
  }
  IndexedFaceSet {
    materialIndex   -1
    normalIndex     -1
    textureCoordIndex       -1
    coordIndex      [
      0,1,2,-1,
      1,0,5,-1,
      2,4,0,-1,
      0,4,5,-1,
      3,2,1,-1,
      3,1,5,-1,
      3,4,2,-1,
      5,4,3,-1
    ]
  }
}