You must clarify your question ASAP.
Prasanna Katarki:
How to check elements are 3d snapped
Prasanna Katarki:What do you mean by elements are 3D snapped?
Prasanna Katarki:
How to check elements are snapped at intersection point
What does that mean? If two elements, 2D or 3D, intersect then there are one or more intersection points.
Prasanna Katarki:
Insert vertex/common node at intersection
Insert a vertex into what?
What is a common node?
