Circles

Discussion in 'AutoCAD' started by ~Jeff~, Oct 13, 2004.

  1. ~Jeff~

    ~Jeff~ Guest

    Does anyone have a lisp routine to draw a circle given the circumference?
     
    ~Jeff~, Oct 13, 2004
    #1
  2. ~Jeff~

    Jason Piercey Guest

    (/ circumference pi) = diameter
     
    Jason Piercey, Oct 13, 2004
    #2
  3. ~Jeff~

    Doug Broad Guest

    If you do it infrequently, draw the circle.
    Double-click on it. Enter the circumference
    in the properties window.
     
    Doug Broad, Oct 13, 2004
    #3
  4. ~Jeff~

    Kent Cooper, AIA Guest

    Something like this, if you're content to specify a center point:

    [CircCircum]^C^C(setq cntr (getpoint "Center point: ")) \+
    (setq circum (getreal "Circumference: ")) \+
    CIRCLE !cntr D (/ circum pi)

    If you want to it by other means, it would be more complicated (e.g. you
    could do a sort-of 3-point variety where you give it 2 points and it
    calculates one of the two circles of the desired circumference that go
    through them, or you could do a 2-point where the distance to the second
    point is constrained to the diameter calculated from the circumference, and
    the user inputs the direction across the diameter).
     
    Kent Cooper, AIA, Oct 13, 2004
    #4
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