Method segmentsIntersect

qcustomplot/qcustomplot.cpp:21330–21350

! \internal Returns whether the segments defined by the coordinates (aLower, aUpper) and (bLower, bUpper) have overlap. The output parameter \a bPrecedence indicates whether the \a b segment reaches farther than the \a a segment or not. If \a bPrecedence returns 1, segment \a b reaches the farthest to higher coordinates (i.e. bUpper > aUpper). If it returns -1, segment \a a reache

  \see getOverlappingSegments
*/
bool QCPGraph::segmentsIntersect(double aLower, double aUpper, double bLower, double bUpper, int &bPrecedence) const
{
  bPrecedence = 0;
  if (aLower > bUpper)
  {
    bPrecedence = -1;
    return false;
  } else if (bLower > aUpper)
  {
    bPrecedence = 1;
    return false;
  } else
  {
    if (aUpper > bUpper)
      bPrecedence = -1;
    else if (aUpper < bUpper)
      bPrecedence = 1;
    
    return true;
  }
}

/*! \internal