[CONNECT C++] convert a smart solid to 2d plane by calling ConvertTo2d(), the generated curves are still in the 3d space

Hi Experts,

I have a model with a brep (such like a smart solid), when I convert it to 2d plane by calling void Handler::ConvertTo2d(EditElementHandleR eeh, TransformCR flattenTrans, DVec3dCR flattenDir), it generates a cell with several curves, but these curves are still in the 3d space.

If the target model is a mesh (such like a cone), the generated curves are in the same 2d plane which I set.

Can ConvertTo2d() deal with brep model? If not, how to deal with brep model in order to get the 2d copy of the 3d model in 2d plane?

Thanks.