public FltInterval Union(FltInterval interval)
{
if (interval.IsEmpty())
{
return(this);
}
if (IsEmpty())
{
return(interval);
}
if (interval.Contains(this))
{
return(interval);
}
if (Contains(interval))
{
return(this);
}
double min = Math.Min(m_Min, interval.m_Min);
double max = Math.Max(m_Max, interval.m_Max);
return(new FltInterval(min, max));
}
public FltInterval Difference(FltInterval interval)
{
if (interval.IsEmpty())
{
return(this);
}
if (IsEmpty())
{
return(this);
}
// 4 : cannot divide into two intervals...
if ((interval.m_Min > m_Min) && (interval.m_Max < m_Max))
{
return(this);
}
// 1, 6 : completely before or after
if ((interval.m_Max < m_Min) || (interval.m_Min > m_Max))
{
return(this);
}
// 3 : completely remove interval => empty
if (interval.Contains(this))
{
return(m_Empty);
}
// 2 : left overlap
if (IntersectsWith(interval) &&
(interval.m_Max < m_Max))
{
double min = Epsilon.Next(interval.m_Max);
double max = m_Max;
return(new FltInterval(min, max));
}
// 5 : right overlap
if (IntersectsWith(interval) &&
(interval.m_Min > m_Min))
{
double min = m_Min;
double max = Epsilon.Prev(interval.m_Min);
return(new FltInterval(min, max));
}
return(m_Empty);
}