Extracting Face and Edge Information from a 3D Solid Without Exploding It

[p7q]

Hello,

I want to collect detailed information about all faces of a `3DSOLID` without exploding or modifying the original solid.

For each face, I would like to obtain information such as:

* Face area
* Face type, such as planar, cylindrical or curved
* Boundary edges of the face
* Length of each edge
* Start and end points of each edge
* Which edges are shared by two adjacent faces
* Which faces are connected to each other through a common edge
* The angle between adjacent faces
* Face normal direction, where available

Ideally, I would like to store the result in a structured form similar to:

Is it possible to retrieve this topology directly using AutoLISP or Visual LISP without using `EXPLODE`?

Would this require the AutoCAD .NET BRep API or ObjectARX, or is there an existing AutoLISP approach?

Any examples, references or recommended methods would be helpful.

Thank you.

[mhupp]

50 minutes ago, p7q said:

without exploding or modifying the original solid.

Often times I would make a copy of a polyline explode it and work over its sub-parts deleting them as i go. no reason you shouldn't do the same here keep the original un touched, make a copy either to a new location or layer and explode and process each part. you shouldn't avoid explode just use it on the copy. 

 

-edit

https://www.cadtutor.net/forum/topic/34725-autocad2012-3d-solidsurface-into-3d-face/#findComment-281787

Edited 2 hours ago by mhupp