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  1. Qt
  2. QTBUG-52312

loss of precision in drawEllipse with large QRectF

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • Icon: P3: Somewhat important P3: Somewhat important
    • None
    • 5.5.1
    • GUI: Painting
    • None
    • i686 Linux with a Fedora 23, qt version 5.5.1

      p.drawEllipse (r)
      produces a large error when r is a big rectangle compared with p
      (the visible window intersects the ellipse in a very small portion.

      This actually happens e.g. in an interactive geometry application like
      kig when drawing the circle through three points that are nearly aligned.

        1. big_circle.png
          big_circle.png
          10 kB
        2. prova_big_circle.cc
          2 kB
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            sletta Gunnar Sletta
            paolini Maurizio Paolini
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              Created:
              Updated:

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