public bool IntersectsWith(FltDomain domain)
{
if (ReferenceEquals(domain, this))
{
return(true);
}
if (domain.IsEmpty())
{
return(false);
}
// 1, 6
if (!m_Interval.IntersectsWith(domain.m_Interval))
{
return(false);
}
if (domain.IsSimple())
{
return(IntersectsWith(domain.m_Interval));
}
if (IsSimple())
{
return(domain.IntersectsWith(m_Interval));
}
int index0 = 0;
int index1 = 0;
bool intersect = false;
while (index0 < m_IntervalList.Count &&
index1 < domain.m_IntervalList.Count &&
!intersect)
{
FltInterval ival0 = m_IntervalList[index0];
FltInterval ival1 = domain.m_IntervalList[index1];
if (ival0.Max < ival1.Min)
{
++index0;
}
else if (ival1.Max < ival0.Min)
{
++index1;
}
else
{
intersect = true;
}
}
return(intersect);
}
public FltDomain Intersect(FltDomain domain)
{
if (ReferenceEquals(domain, this))
{
return(this);
}
if (domain.IsEmpty())
{
return(m_Empty);
}
if (domain.IsSimple())
{
return(Intersect(domain.m_Interval));
}
// 1, 6
if (!IntersectsWith(domain))
{
return(m_Empty);
}
// If the target is contained, then the result would be equal to the domain, hence we return the domain.
if (IsSimple())
{
if (domain.Contains(m_Interval))
{
return(this);
}
if (m_Interval.Contains(domain.m_Interval))
{
return(domain);
}
}
// Need to be a bit smart, put our interval in a list, in case it gets chopped up.
List <FltInterval> intervalList;
if (IsSimple())
{
intervalList = new List <FltInterval>(1);
intervalList.Add(m_Interval);
}
else
{
intervalList = m_IntervalList;
}
FltDomain result = new FltDomain();
result.m_IntervalList = new List <FltInterval>(intervalList.Count + domain.m_IntervalList.Count);
int idx = 0;
int domIdx = 0;
bool equal = true;
while (idx < intervalList.Count ||
domIdx < domain.m_IntervalList.Count)
{
// 6
if (idx == intervalList.Count)
{
domIdx = domain.m_IntervalList.Count;
}
// 1
else if (domIdx == domain.m_IntervalList.Count)
{
idx = intervalList.Count;
equal = false;
}
else
{
FltInterval intv = intervalList[idx];
FltInterval domIntv = domain.m_IntervalList[domIdx];
// 1 : completely before
if (domIntv.Max < intv.Min)
{
++domIdx;
}
// 6 : completely after
else if (domIntv.Min > intv.Max)
{
++idx;
equal = false;
}
// 3
else if (domIntv.Contains(intv))
{
result.m_IntervalList.Add(intv);
++idx;
}
// ~4 : divide into two intervals...
else if (I4_Divide(intv, domIntv))
{
result.m_IntervalList.Add(domIntv);
++domIdx;
equal = false;
}
// 2
else if (I2_IntersectMin(intv, domIntv))
{
result.m_IntervalList.Add(intv.Intersect(domIntv));
++domIdx;
equal = false;
}
// 5
else if (I5_IntersectMax(intv, domIntv))
{
result.m_IntervalList.Add(intv.Intersect(domIntv));
++idx;
equal = false;
}
}
}
if (equal)
{
return(this);
}
result.UpdateInterval();
return(result);
}
public FltDomain Difference(FltDomain domain)
{
if (ReferenceEquals(domain, this))
{
return(m_Empty);
}
if (domain.IsEmpty())
{
return(this);
}
if (domain.IsSimple())
{
return(Difference(domain.m_Interval));
}
//1, 6
if (!IntersectsWith(domain.m_Interval))
{
return(this);
}
// Need to be a bit smart, put our interval in a list, in case it gets chopped up.
List <FltInterval> intervalList;
if (IsSimple())
{
intervalList = new List <FltInterval>(1);
intervalList.Add(m_Interval);
}
else
{
intervalList = m_IntervalList;
}
FltDomain result = new FltDomain();
result.m_IntervalList = new List <FltInterval>(intervalList.Count + domain.m_IntervalList.Count);
int idx = 0;
int domIdx = 0;
while (idx < intervalList.Count ||
domIdx < domain.m_IntervalList.Count)
{
// 6
if (idx == intervalList.Count)
{
domIdx = domain.m_IntervalList.Count;
}
// 1
else if (domIdx == domain.m_IntervalList.Count)
{
idx = intervalList.Count;
}
else
{
FltInterval intv = intervalList[idx];
FltInterval domIntv = domain.m_IntervalList[domIdx];
// 1 : completely before
if (domIntv.Max < intv.Min)
{
++domIdx;
}
// 6 : completely after
else if (domIntv.Min > intv.Max)
{
result.m_IntervalList.Add(intv);
++idx;
}
// 3
else if (domIntv.Contains(intv))
{
++idx;
}
// 4 : divide into two intervals...
else if (I4_Divide(intv, domIntv))
{
while (domIdx < domain.m_IntervalList.Count &&
I4_Divide(intv, domIntv))
{
result.m_IntervalList.Add(new FltInterval(intv.Min, Epsilon.Prev(domIntv.Min)));
intv = new FltInterval(Epsilon.Next(domIntv.Max), intv.Max);
++domIdx;
if (domIdx < domain.m_IntervalList.Count)
{
domIntv = domain.m_IntervalList[domIdx];
}
}
result.m_IntervalList.Add(intv);
}
// 2
else if (I2_IntersectMin(intv, domIntv))
{
result.m_IntervalList.Add(intv.Difference(domIntv));
++domIdx;
}
// 5
else if (I5_IntersectMax(intv, domIntv))
{
result.m_IntervalList.Add(intv.Difference(domIntv));
++idx;
}
}
}
result.UpdateInterval();
return(result);
}
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);
}
}