Snapping to quadrants on an incomplete ellipse - is it possible

Discussion in 'Microstation' started by Matthew Taylor, Jul 18, 2004.

  1. Microstation seems to have no Quadrant snap as such - only keypoint snap
    that dividesa circle into 4, alllowing to find points to snap to at the
    corners & does the same with ellipses.
    However, if I trim an ellipse, to form an elliptical arc, I can no
    longer snap to it's quadrants - even though IMHO it still has obvious
    quadrants to it, & certain other CAD programs can achieve this.
    So is there any way I can snap to these quadrants? short of leaving
    construction lines for each ellipse I draw - or is the problem due to
    some fundamental difference in the way Microstation represents ellipses
    in its drawing database & as such does not identify an eliptical arc as
    having any special properties other than those of a B-Spline?
     
    Matthew Taylor, Jul 18, 2004
    #1
  2. ---------------------------------
    Hallo Matthew,
    the quadrant points are keypoints only at whole circles and ellipses, not at
    circular or elliptical arcs, i.e. you can't snap to quadrants at an arc. But
    this has nothing to do with the data representation in the database. An arc
    is not a b-spline.
    Regards, M.B.
     
    Martin Blanke, Jul 19, 2004
    #2
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