Offset of polylines

Discussion in 'AutoCAD' started by FengyinWang, Jul 30, 2003.

  1. FengyinWang

    FengyinWang Guest

    Greeting to everyone!

    Is there any free code to produce a correct
    offset from a closed polyline?

    Regards!
     
    FengyinWang, Jul 30, 2003
    #1
  2. FengyinWang

    morrisde Guest

    (vla-offset <obj> <offsetdist>) where <obj> is a vla object, <offsetdist> is the distance (negative to offset inside, positive to offset outside). Regards,
    Dave
     
    morrisde, Jul 30, 2003
    #2
  3. FengyinWang

    FengyinWang Guest

    Dear Dave:

    This function produces the same results as the "offset" command. The result is never a true offset in the
    definition of an offset. For example, a offset of a
    rectangle outwards should generate one with for round
    corners whose radius is the same as the offset distance.

    For many irregular profiles, the AutoCAD native "offset"
    would not produce a meaningful results.

    Regards,
    Wantg
     
    FengyinWang, Jul 31, 2003
    #3
  4. FengyinWang

    OLD-CADaver Guest

    To me, the native ACAD function is correct. If the original element is not curved the offset element shouldn't be either. In you example, the left element is offset one unit left, the upper element is offset one unit up, a single point common to both (the corner) would be offset left one unit AND up one unit. Use FILLET with a radius equal to the offset distance to produce your desired result.
     
    OLD-CADaver, Jul 31, 2003
    #4
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