//------------------------------------------------------------------------------
public static Paths OpenPathsFromPolyTree(PolyTree polytree)
{
Paths result = new Paths();
result.Capacity = polytree.ChildCount;
for (int i = 0; i < polytree.ChildCount; i++)
if (polytree.Childs[i].IsOpen)
result.Add(polytree.Childs[i].Contour);
return result;
}
//------------------------------------------------------------------------------
public static Paths ClosedPathsFromPolyTree(PolyTree polytree)
{
Paths result = new Paths();
result.Capacity = polytree.Total;
AddPolyNodeToPaths(polytree, NodeType.ntClosed, result);
return result;
}
public static Paths PolyTreeToPaths(PolyTree polytree)
{
Paths result = new Paths();
result.Capacity = polytree.Total;
AddPolyNodeToPaths(polytree, NodeType.ntAny, result);
return result;
}
//------------------------------------------------------------------------------
public static void PolyTreeToPolygons(PolyTree polytree, Polygons polys)
{
polys.Clear();
polys.Capacity = polytree.Total;
AddPolyNodeToPaths(polytree, NodeType.ntAny, polys);
}
//------------------------------------------------------------------------------
private void BuildResult2(PolyTree polytree)
{
polytree.Clear();
//add each output polygon/contour to polytree ...
polytree.m_AllPolys.Capacity = m_PolyOuts.Count;
for (int i = 0; i < m_PolyOuts.Count; i++)
{
OutRec outRec = m_PolyOuts[i];
int cnt = PointCount(outRec.Pts);
if ((outRec.IsOpen && cnt < 2) ||
(!outRec.IsOpen && cnt < 3)) continue;
FixHoleLinkage(outRec);
PolyNode pn = new PolyNode();
polytree.m_AllPolys.Add(pn);
outRec.PolyNode = pn;
pn.m_polygon.Capacity = cnt;
OutPt op = outRec.Pts.Prev;
for (int j = 0; j < cnt; j++)
{
pn.m_polygon.Add(op.Pt);
op = op.Prev;
}
}
//fixup PolyNode links etc ...
polytree.m_Childs.Capacity = m_PolyOuts.Count;
for (int i = 0; i < m_PolyOuts.Count; i++)
{
OutRec outRec = m_PolyOuts[i];
if (outRec.PolyNode == null) continue;
else if (outRec.IsOpen)
{
outRec.PolyNode.IsOpen = true;
polytree.AddChild(outRec.PolyNode);
}
else if (outRec.FirstLeft != null)
outRec.FirstLeft.PolyNode.AddChild(outRec.PolyNode);
else
polytree.AddChild(outRec.PolyNode);
}
}
//------------------------------------------------------------------------------
public bool Execute(ClipType clipType, PolyTree polytree)
{
return Execute(clipType, polytree,
PolyFillType.pftEvenOdd, PolyFillType.pftEvenOdd);
}
//------------------------------------------------------------------------------
public bool Execute(ClipType clipType, PolyTree polytree,
PolyFillType subjFillType, PolyFillType clipFillType)
{
if (m_ExecuteLocked) return false;
m_ExecuteLocked = true;
m_SubjFillType = subjFillType;
m_ClipFillType = clipFillType;
m_ClipType = clipType;
m_UsingPolyTree = true;
bool succeeded = ExecuteInternal();
//build the return polygons ...
if (succeeded) BuildResult2(polytree);
m_ExecuteLocked = false;
return succeeded;
}