Coordinate { 
  exposedField MFVec3f point  []      # (- ,
, )
}
)
}
#VRML V2.0 utf8
Shape {
  geometry IndexedLineSet {
    coord Coordinate {
      point [0 .2 1, 1 0 0, 0 1 0, -1 0 0]
    }
    coordIndex [
      0 1 -1,
      0 2 -1,
      0 3 -1,
      1 2 -1,
      1 3 -1,
      2 3 -1
    ]
  }
}
#http://vrmlbyhand.hoops.ne.jp/ref/IndexedLineSet.wrl