protected virtual void Reset()
{
this.m_CurrentLM = this.m_MinimaList;
if (this.m_CurrentLM == null)
{
return;
}
for (LocalMinima localMinima = this.m_MinimaList; localMinima != null; localMinima = localMinima.Next)
{
TEdge tEdge = localMinima.LeftBound;
if (tEdge != null)
{
tEdge.Curr = tEdge.Bot;
tEdge.Side = EdgeSide.esLeft;
if (tEdge.OutIdx != -2)
{
tEdge.OutIdx = -1;
}
}
tEdge = localMinima.RightBound;
tEdge.Curr = tEdge.Bot;
tEdge.Side = EdgeSide.esRight;
if (tEdge.OutIdx != -2)
{
tEdge.OutIdx = -1;
}
}
}
internal ClipperBase()
{
this.m_MinimaList = null;
this.m_CurrentLM = null;
this.m_UseFullRange = false;
this.m_HasOpenPaths = false;
}
protected void PopLocalMinima()
{
if (this.m_CurrentLM != null)
{
this.m_CurrentLM = this.m_CurrentLM.Next;
}
}
protected virtual void Reset()
{
this.m_CurrentLM = this.m_MinimaList;
if (this.m_CurrentLM != null)
{
for (LocalMinima minima = this.m_MinimaList; minima != null; minima = minima.Next)
{
TEdge leftBound = minima.LeftBound;
if (leftBound != null)
{
leftBound.Curr = leftBound.Bot;
leftBound.Side = EdgeSide.esLeft;
if (leftBound.OutIdx != -2)
{
leftBound.OutIdx = -1;
}
}
leftBound = minima.RightBound;
leftBound.Curr = leftBound.Bot;
leftBound.Side = EdgeSide.esRight;
if (leftBound.OutIdx != -2)
{
leftBound.OutIdx = -1;
}
}
}
}
private void DoMinimaLML(TEdge E1, TEdge E2, bool IsClosed)
{
if (E1 == null)
{
if (E2 != null)
{
LocalMinima newLm = new LocalMinima {
Next = null,
Y = E2.Bot.Y,
LeftBound = null
};
E2.WindDelta = 0;
newLm.RightBound = E2;
this.InsertLocalMinima(newLm);
}
}
else
{
LocalMinima minima2 = new LocalMinima {
Y = E1.Bot.Y,
Next = null
};
if (IsHorizontal(E2))
{
if (E2.Bot.X != E1.Bot.X)
{
this.ReverseHorizontal(E2);
}
minima2.LeftBound = E1;
minima2.RightBound = E2;
}
else if (E2.Dx < E1.Dx)
{
minima2.LeftBound = E1;
minima2.RightBound = E2;
}
else
{
minima2.LeftBound = E2;
minima2.RightBound = E1;
}
minima2.LeftBound.Side = EdgeSide.esLeft;
minima2.RightBound.Side = EdgeSide.esRight;
if (!IsClosed)
{
minima2.LeftBound.WindDelta = 0;
}
else if (minima2.LeftBound.Next == minima2.RightBound)
{
minima2.LeftBound.WindDelta = -1;
}
else
{
minima2.LeftBound.WindDelta = 1;
}
minima2.RightBound.WindDelta = -minima2.LeftBound.WindDelta;
this.InsertLocalMinima(minima2);
}
}
protected void PopLocalMinima()
{
if (this.m_CurrentLM == null)
{
return;
}
this.m_CurrentLM = this.m_CurrentLM.Next;
}
private void DoMinimaLML(TEdge E1, TEdge E2, bool IsClosed)
{
if (E1 == null)
{
if (E2 == null)
{
return;
}
LocalMinima localMinima = new LocalMinima();
localMinima.Next = null;
localMinima.Y = E2.Bot.Y;
localMinima.LeftBound = null;
E2.WindDelta = 0;
localMinima.RightBound = E2;
this.InsertLocalMinima(localMinima);
}
else
{
LocalMinima localMinima2 = new LocalMinima();
localMinima2.Y = E1.Bot.Y;
localMinima2.Next = null;
if (ClipperBase.IsHorizontal(E2))
{
if (E2.Bot.X != E1.Bot.X)
{
this.ReverseHorizontal(E2);
}
localMinima2.LeftBound = E1;
localMinima2.RightBound = E2;
}
else if (E2.Dx < E1.Dx)
{
localMinima2.LeftBound = E1;
localMinima2.RightBound = E2;
}
else
{
localMinima2.LeftBound = E2;
localMinima2.RightBound = E1;
}
localMinima2.LeftBound.Side = EdgeSide.esLeft;
localMinima2.RightBound.Side = EdgeSide.esRight;
if (!IsClosed)
{
localMinima2.LeftBound.WindDelta = 0;
}
else if (localMinima2.LeftBound.Next == localMinima2.RightBound)
{
localMinima2.LeftBound.WindDelta = -1;
}
else
{
localMinima2.LeftBound.WindDelta = 1;
}
localMinima2.RightBound.WindDelta = -localMinima2.LeftBound.WindDelta;
this.InsertLocalMinima(localMinima2);
}
}
private void DisposeLocalMinimaList()
{
while (this.m_MinimaList != null)
{
LocalMinima next = this.m_MinimaList.Next;
this.m_MinimaList = null;
this.m_MinimaList = next;
}
this.m_CurrentLM = null;
}
private void InsertLocalMinima(LocalMinima newLm)
{
if (this.m_MinimaList == null)
{
this.m_MinimaList = newLm;
}
else if (newLm.Y >= this.m_MinimaList.Y)
{
newLm.Next = this.m_MinimaList;
this.m_MinimaList = newLm;
}
else
{
LocalMinima localMinima = this.m_MinimaList;
while (localMinima.Next != null && newLm.Y < localMinima.Next.Y)
{
localMinima = localMinima.Next;
}
newLm.Next = localMinima.Next;
localMinima.Next = newLm;
}
}
private void InsertLocalMinima(LocalMinima newLm)
{
if (this.m_MinimaList == null)
{
this.m_MinimaList = newLm;
}
else if (newLm.Y >= this.m_MinimaList.Y)
{
newLm.Next = this.m_MinimaList;
this.m_MinimaList = newLm;
}
else
{
LocalMinima minimaList = this.m_MinimaList;
while ((minimaList.Next != null) && (newLm.Y < minimaList.Next.Y))
{
minimaList = minimaList.Next;
}
newLm.Next = minimaList.Next;
minimaList.Next = newLm;
}
}
//---------------------------------------------------------------------------
void DoMinimaLML(TEdge E1, TEdge E2, bool IsClosed)
{
if (E1 == null)
{
if (E2 == null) return;
LocalMinima NewLm = new LocalMinima();
NewLm.Next = null;
NewLm.Y = E2.Bot.Y;
NewLm.LeftBound = null;
E2.WindDelta = 0;
NewLm.RightBound = E2;
InsertLocalMinima(NewLm);
} else
{
//E and E.Prev are now at a local minima ...
LocalMinima NewLm = new LocalMinima();
NewLm.Y = E1.Bot.Y;
NewLm.Next = null;
if (IsHorizontal(E2)) //Horz. edges never start a Left bound
{
if (E2.Bot.X != E1.Bot.X) ReverseHorizontal(E2);
NewLm.LeftBound = E1;
NewLm.RightBound = E2;
} else if (E2.Dx < E1.Dx)
{
NewLm.LeftBound = E1;
NewLm.RightBound = E2;
} else
{
NewLm.LeftBound = E2;
NewLm.RightBound = E1;
}
NewLm.LeftBound.Side = EdgeSide.esLeft;
NewLm.RightBound.Side = EdgeSide.esRight;
//set the winding state of the first edge in each bound
//(it'll be copied to subsequent edges in the bound) ...
if (!IsClosed) NewLm.LeftBound.WindDelta = 0;
else if (NewLm.LeftBound.Next == NewLm.RightBound) NewLm.LeftBound.WindDelta = -1;
else NewLm.LeftBound.WindDelta = 1;
NewLm.RightBound.WindDelta = -NewLm.LeftBound.WindDelta;
InsertLocalMinima(NewLm);
}
}
//------------------------------------------------------------------------------
protected void PopLocalMinima()
{
if (m_CurrentLM == null) return;
m_CurrentLM = m_CurrentLM.Next;
}
//------------------------------------------------------------------------------
protected virtual void Reset()
{
m_CurrentLM = m_MinimaList;
if (m_CurrentLM == null) return; //ie nothing to process
//reset all edges ...
LocalMinima lm = m_MinimaList;
while (lm != null)
{
TEdge e = lm.LeftBound;
if (e != null)
{
e.Curr = e.Bot;
e.Side = EdgeSide.esLeft;
if (e.OutIdx != Skip)
e.OutIdx = Unassigned;
}
e = lm.RightBound;
e.Curr = e.Bot;
e.Side = EdgeSide.esRight;
if (e.OutIdx != Skip)
e.OutIdx = Unassigned;
lm = lm.Next;
}
}
//------------------------------------------------------------------------------
internal ClipperBase() //constructor (nb: no external instantiation)
{
m_MinimaList = null;
m_CurrentLM = null;
m_UseFullRange = false;
m_HasOpenPaths = false;
}
public IntRect GetBounds()
{
IntRect result = default(IntRect);
LocalMinima localMinima = this.m_MinimaList;
if (localMinima == null)
{
return(result);
}
result.left = localMinima.LeftBound.Bot.X;
result.top = localMinima.LeftBound.Bot.Y;
result.right = localMinima.LeftBound.Bot.X;
result.bottom = localMinima.LeftBound.Bot.Y;
while (localMinima != null)
{
if (localMinima.LeftBound.Bot.Y > result.bottom)
{
result.bottom = localMinima.LeftBound.Bot.Y;
}
TEdge tEdge = localMinima.LeftBound;
while (true)
{
TEdge tEdge2 = tEdge;
while (tEdge.NextInLML != null)
{
if (tEdge.Bot.X < result.left)
{
result.left = tEdge.Bot.X;
}
if (tEdge.Bot.X > result.right)
{
result.right = tEdge.Bot.X;
}
tEdge = tEdge.NextInLML;
}
if (tEdge.Bot.X < result.left)
{
result.left = tEdge.Bot.X;
}
if (tEdge.Bot.X > result.right)
{
result.right = tEdge.Bot.X;
}
if (tEdge.Top.X < result.left)
{
result.left = tEdge.Top.X;
}
if (tEdge.Top.X > result.right)
{
result.right = tEdge.Top.X;
}
if (tEdge.Top.Y < result.top)
{
result.top = tEdge.Top.Y;
}
if (tEdge2 != localMinima.LeftBound)
{
break;
}
tEdge = localMinima.RightBound;
}
localMinima = localMinima.Next;
}
return(result);
}
//------------------------------------------------------------------------------
private void DisposeLocalMinimaList()
{
while( m_MinimaList != null )
{
LocalMinima tmpLm = m_MinimaList.Next;
m_MinimaList = null;
m_MinimaList = tmpLm;
}
m_CurrentLM = null;
}
//------------------------------------------------------------------------------
private void InsertLocalMinima(LocalMinima newLm)
{
if( m_MinimaList == null )
{
m_MinimaList = newLm;
}
else if( newLm.Y >= m_MinimaList.Y )
{
newLm.Next = m_MinimaList;
m_MinimaList = newLm;
} else
{
LocalMinima tmpLm = m_MinimaList;
while( tmpLm.Next != null && ( newLm.Y < tmpLm.Next.Y ) )
tmpLm = tmpLm.Next;
newLm.Next = tmpLm.Next;
tmpLm.Next = newLm;
}
}
