public FltDomain Abs()
{
if (IsEmpty())
{
return(m_Empty);
}
if (m_Interval.Min >= 0)
{
return(this);
}
if (m_Interval.Max <= 0)
{
return(Negate());
}
FltDomain lower = -Intersect(double.MinValue, 0);
FltDomain upper = Intersect(0, double.MaxValue);
return(lower.Union(upper));
}
public FltDomain Union(FltDomain domain)
{
if (ReferenceEquals(domain, this))
{
return(this);
}
if (domain.IsEmpty())
{
return(this);
}
if (IsEmpty())
{
return(domain);
}
if (domain.IsSimple())
{
return(Union(domain.m_Interval));
}
if (IsSimple())
{
if (m_Interval.Contains(domain.m_Interval))
{
return(this);
}
return(domain.Union(m_Interval));
}
else
{
FltDomain result = new FltDomain();
result.m_Interval = m_Interval.Union(domain.m_Interval);
result.m_IntervalList = new List <FltInterval>(m_IntervalList.Count + domain.m_IntervalList.Count);
// 1 : completely before
if (domain.m_Interval.Max < m_Interval.Min)
{
result.m_IntervalList.AddRange(domain.m_IntervalList);
result.m_IntervalList.AddRange(m_IntervalList);
}
// 6 : completely after
else if (domain.m_Interval.Min > m_Interval.Max)
{
result.m_IntervalList.AddRange(m_IntervalList);
result.m_IntervalList.AddRange(domain.m_IntervalList);
}
else
{
int idx = 0;
int domIdx = 0;
bool equal = true;
while (idx < m_IntervalList.Count ||
domIdx < domain.m_IntervalList.Count)
{
// 6 :
if (idx == m_IntervalList.Count)
{
equal = false;
for ( ; domIdx < domain.m_IntervalList.Count; ++domIdx)
{
result.m_IntervalList.Add(domain.m_IntervalList[domIdx]);
}
}
// 1 : remaining intervals after
else if (domIdx == domain.m_IntervalList.Count)
{
for ( ; idx < m_IntervalList.Count; ++idx)
{
result.m_IntervalList.Add(m_IntervalList[idx]);
}
}
else
{
FltInterval intv = m_IntervalList[idx];
FltInterval domIntv = domain.m_IntervalList[domIdx];
// 1 : completely before
if (domIntv.Max < intv.Min)
{
equal = false;
result.m_IntervalList.Add(domIntv);
++domIdx;
}
// 6 : completely after
else if (domIntv.Min > intv.Max)
{
result.m_IntervalList.Add(intv);
++idx;
}
// 3
else if (domIntv.Contains(intv))
{
equal = false;
++idx;
}
// 3
else if (intv.Contains(domIntv))
{
++domIdx;
}
// 2, 5
else
{
equal = false;
FltInterval intvTmp = intv.Union(domIntv);
++idx;
// contains...
for ( ; idx < m_IntervalList.Count &&
intvTmp.Contains(m_IntervalList[idx]);
++idx)
{
}
;
// intersect...
while (idx < m_IntervalList.Count &&
m_IntervalList[idx].IntersectsWith(intvTmp))
{
intvTmp = intvTmp.Union(m_IntervalList[idx]);
++idx;
}
result.m_IntervalList.Add(intvTmp);
++domIdx;
}
}
}
if (equal)
{
return(this);
}
result.CheckSimple();
}
return(result);
}
}