message: Remove an arbitrary factor. Use a comparison between normal coordinates
diff: @@ -437,11 +437,11 @@ namespace RINGMesh
  // @todo A generic algorithm to find the first vector belonging to the plane
  // can be designed using principal component of the plane normal.
  - // However it is not a simple problem. The current version is
  - // not generic and is based on the idea that the plane is either a map section
  + // However it is not a simple problem. The current version is not generic
  + // and is based on the idea that the plane is either a map section
  // or a cross-section. [PA]
  vec3 another_point_for_v_axis{ origin };
  - if( w.z > 10 * ( w.x + w.y ) )
  + if( std::fabs( w.z ) > ( std::fabs( w.x ) + std::fabs( w.y ) ) )
  {
  // Case where plane is sub-horizontal
  // (v axis is set towards 3D y direction)
  