4 responses

  1. Diana
    November 19, 2012

    I think there is a better way, like:
    you draw whatever you like.
    after you getting the result you need, simply press the command BO (for boundary), and press on the middle of the area you’ve got.
    and its creating you a polyline shape.
    just like we all want :)

  2. Mike P
    November 20, 2012

    One neat trick I’ve used is to create a rectangular region with subtracted circular areas as a means to define model viewports (Mviews) in layouts (or paperspace) with a masked area or areas for enlarged details:

    1) Create a rectangle
    2) Inside the rectangle create a circle.
    3) Use the “region” command to convert both the rectangle and circle to regions.
    4) “SUBTRACT” the circle region from the rectangle region.
    5) Now use the mview command with the “Object” option.

    The circle will be a masked area in the viewport. You can then add a circular viewport in the masked circle for an enlarged detail.

    • Ellen
      November 20, 2012

      Very cool!

  3. mohamed
    February 10, 2014

    when performing subtract in autocad 3d the object disappear , can i get help plz ?

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