[kwin] [Bug 391860] New: Compare floating point numbers properly in libkwineffects

[Vlad Zagorodniy]

https://bugs.kde.org/show_bug.cgi?id=391860

            Bug ID: 391860
           Summary: Compare floating point numbers properly in
                    libkwineffects
           Product: kwin
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: compositing
          Assignee: kwin-bugs-n...@kde.org
          Reporter: vladz...@gmail.com
  Target Milestone: ---

WindowQuad, WindowQuadList, and WindowMotionManager use '==' to compare
floating point numbers, this is completely wrong. 

Please note, we can't use qFuzzyCompare because it doesn't work if one of
numbers is 0.

For reference, Boost's docs on floating point comparison.

http://www.boost.org/doc/libs/1_61_0/libs/math/doc/html/math_toolkit/float_comparison.html

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