solid testTriangle
  facet normal 0.0 0.0 1.0 
    outer loop 
      vertex 1.0 1.0 0.0 
      vertex -1.0 1.0 0.0 
      vertex 0.0 -1.0 0.0 
    endloop 
  endfacet 
endsolid
solid emptySolid
endsolid