QPointF equality operator

[jenova_project]

Hi everyone,

The QPointF equality function seems to take floating point inaccuracy into account, however I have been unable to find any documentation on how it does so (ie. what epsilon value / percentage error etc. is used). Can anyone tell me how it is done and what tolerance values are used?

[jpn]

src/corelib/global/qglobal.h:


static inline bool qFuzzyCompare(double p1, double p2)
{
return (qAbs(p1 - p2) <= 0.000000000001 * qMin(qAbs(p1), qAbs(p2)));
}

static inline bool qFuzzyCompare(float p1, float p2)
{
return (qAbs(p1 - p2) <= 0.00001f * qMin(qAbs(p1), qAbs(p2)));
}