Use BPOLY to create an AutoCAD Shrinkwrap entity

Published on April 2, 2012

AutoCAD BPOLY command

Instead of using commands such as Copy, Trim, Pedit with Join to create a closed polyline around multiple entities try using the BPOLY command.

The BPOLY command will open the Boundary Creation Dialog box.

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To create a closed polyline around the outside of the objects simply create a rectangle polyline enclosing the objects before running the BPOLY command.  This will ensure you can use the Island detection option.  Make your pick point between the rectangle polyline and the objects.

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Finally delete the polyline rectangle once the closed polyline has been created.

Addendum example:

Objects that formed multiple closed spaces.  The idea behind using the rectangle is to shrinkwrap the largest combined closed space that the objects made.

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2 Responses to “Use BPOLY to create an AutoCAD Shrinkwrap entity”

  1. Marco Says:

    May 4th, 2012 at 1:55 am

    Why don’t you just click inside the figure? It’s exactly the same since the entities have no thickness. In your example there is no ‘inside’ or ‘outside’.
    So, this makes your tipp useless. Sorry I have to say that.
    Cheers, Marco

  2. Eric Says:

    May 4th, 2012 at 10:22 am

    Thanks for the comment. When the objects create a single closed space, you are right, there would be no need for creating a surrounding closed shape.
    The Addendum Example should depict the shrinkwrap idea better.

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