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create polygon from list of points

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  • R Offline
    R Offline
    ranshalit
    wrote on last edited by
    #1

    Hello,

    I need to create a polygon (which can be filled) , from a list of points.
    I see in https://forum.qt.io/topic/62142/qpainterpath-from-list-of-points that this my problem might already have a simple solution in Qt by using QPainterPathStroker .

    I haven't tried it yet, but would first like to ask: Does the order of points matters here ?

    Thank you!
    Ran

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    • Chris KawaC Offline
      Chris KawaC Offline
      Chris Kawa
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Yes, the order of points in a path matters. Imagine 4 points of a rectangle. depending on the order you connect them in you'll get either a rectangle or an hourglass. How such intersecting geometry fills depends then on the fill rule of the path.

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