I find the struct surf_hear s and s.type mean surface type, Does anyone knows how to use this variable? Is it possible to get the value of s.type to signify Plane, Cylinder, Cone, torus, Sphere, BSurface...?

I want to obtain the surface type and its geometry, but when use AskForGeometry funtion, the code break. Here is the code: GeometryMask geomMask(true); geomMask.SetSurfaces(true); auto spManager = GetSelectionManager(); IGeometrySPtr pGeometry; spManager->AskForGeometry(L"Select Surfaces", geomMask, pGeometry); // crash here if (pGeometry) { int entityId = pGeometry->GetEntityID(); }