Topic: Enclose Points with Polyline

[cadplayer]

Hello!

May somebody have a idea to create enclosed Polyline outside from Points in Drawing.
I have a Drawing with many  DbPoints. What I want to do is to create a Polyline which goes over all outer Points.
In Civil3d there is a command with lineworkshrinkwrap, where I can select a block and get a borderline from contours of block.
I would like do the same but not use with command with senttoexecute.

Thank you for inspiration!

[gile]

Hi,

Have a look at the ConvexHull route.

[cadplayer]

Nice Gile, thank you for your work and sharing. Let me think about more - in my case is created Polyline not enclose overall.

[gile]

So, did you try the TEST command n the provided link?

[cadplayer]

Sorry for delay Gile, yes I have test your function and it´s really nice your thought. I have to configure out a bit more, because it does not draw Polyline(yellow) overall.
http://www.screencast.com/t/DQPecCuwsB

[Atook]

Good to see the example cadplayer. Is it possible that elevation is causing the dips in the convex hull/shrinkwrap?

[cadplayer]

My goal to draw outerline or enclosed Polylines is to set Boundary for calculate Triangulation. Giles example show´s to create 2dPolyline enclosed around selected Points, But I need more exactly line:
black line behind red triangle

http://s1356.photobucket.com/user/cadplayer/media/Triangulate_zps5egmsmru.png.html

Here is my example to get enclosed lines

Code: [Select]


        public static void ObjectsToEnclose(Entity acEnt)
        {
            Document acDoc = Application.DocumentManager.MdiActiveDocument;

            string strHandle = acEnt.Handle.ToString();
            acDoc.SendStringToExecute("lineworkshrinkwrap ", true, false, false);

            string command = string.Format("(handent \"" + strHandle + "\") ");
            acDoc.SendStringToExecute(command, true, false, false);
        }

Works only in Civil3d or MAP