//------------------------------------------------------------------------------
internal virtual void Reset()
{
m_CurrentLM = m_MinimaList;
if (m_CurrentLM == null)
{
return; //ie nothing to process
}
//reset all edges ...
m_Scanbeam = null;
ClipperLocalMinima lm = m_MinimaList;
while (lm != null)
{
InsertScanbeam(lm.Y);
ClipperTEdge e = lm.LeftBound;
if (e != null)
{
e.Curr = e.Bot;
e.OutIdx = Unassigned;
}
e = lm.RightBound;
if (e != null)
{
e.Curr = e.Bot;
e.OutIdx = Unassigned;
}
lm = lm.Next;
}
m_ActiveEdges = null;
}
//------------------------------------------------------------------------------
internal bool PopScanbeam(out long Y)
{
if (m_Scanbeam == null)
{
Y = 0;
return(false);
}
Y = m_Scanbeam.Y;
m_Scanbeam = m_Scanbeam.Next;
return(true);
}
//------------------------------------------------------------------------------
internal void InsertScanbeam(long Y)
{
//single-linked list: sorted descending, ignoring dups.
if (m_Scanbeam == null)
{
m_Scanbeam = new ClipperScanbeam
{
Next = null,
Y = Y
};
}
else if (Y > m_Scanbeam.Y)
{
ClipperScanbeam newSb = new ClipperScanbeam
{
Y = Y,
Next = m_Scanbeam
};
m_Scanbeam = newSb;
}
else
{
ClipperScanbeam sb2 = m_Scanbeam;
while (sb2.Next != null && (Y <= sb2.Next.Y))
{
sb2 = sb2.Next;
}
if (Y == sb2.Y)
{
return; //ie ignores duplicates
}
ClipperScanbeam newSb = new ClipperScanbeam
{
Y = Y,
Next = sb2.Next
};
sb2.Next = newSb;
}
}
