Polyface Mesh to Simple Polyline

[Rakesh Rao]

Hi,

We have received drawings containing many Polyface mesh entities which
actually should have been simple Pline entities. What is the best way to

convert them to Polylines? The face record and their relationships /
visible/invisible edges make this difficult, if not impossible, even
with a Lisp. Any suggestions or code for a quick conversion which should

visually give the same geometry.

Thanks & Regards
Rakesh Rao

*************************************************************
Rakesh Rao
GIS Software Development & Consulting

AutoLisp / ARX / menu customization.
GIS/Mapping/GPS AM/FM programming.

email : rakes...@usa.net
************************************************************

[Reini Urban]

meshes are faces, plines are linear, so they are not convertible.

if you want just the edges of the mesh, you could convert it to lines,
which is quite easy: either extract the vertex/edge information of the
mesh, or if this is too complicated for you, explode the mesh into faces
and extract the edges there.
invisible edges (negative indices/3dface: flag) maybe omitted ot put
onto a seperate layer.

Rakesh Rao wrote:
> We have received drawings containing many Polyface mesh entities which
> actually should have been simple Pline entities. What is the best way to
> convert them to Polylines? The face record and their relationships /
> visible/invisible edges make this difficult, if not impossible, even
> with a Lisp. Any suggestions or code for a quick conversion which should
> visually give the same geometry.

--
Reini Urban http://xarch.tu-graz.ac.at/~rurban/
Please don't send technical questions directly to me, post them to
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