3D Face from closed polyline

[lawrence gabriel]

Is there a way to create a 3D face from an enclosed polyline? is there a command or will I need to write a lisp program.

I thought this command existed in R12 or R14 but I cannot find anything in R2000 or higher.

Any suggestions will be appreciated

 

[Tom Berger]

Is there a way to create a 3D face from an enclosed polyline? is there a command or will I need to write a lisp program.

You can create a region from the polyline, write it to a non-binary STL file (command: STLOUT), and use the free app STLIN from http://www.archdim.de/STLIN.LSP to import the STL file and create 3D-faces from the data. If your polyline has more then 3 vertices you will get more than one single 3D face.

Tom Berger

 

[Laurie Comerford]

Hi Lawrence,

A 3D face always has 4 vertices and all the sides are straight. Commonly two of the vertices are coincident so that the 3Dface appears as a triangle.

It follows then that in general a polyline which can have from 2 to any number of vertices and may include curves cannot automatically be converted to a 3D face.

You can write programs which will collect data from the polyline and create a series of 3DFaces to represent the polyline. You have to decide whether to abandon all curvature or to try and approximate it with chords.

 

[jochen]

I wrote such a LISP to convert plines to faces ( and then into SOLIDs) In case of interest please contact me via www.black-cad.de regards Jochen