internal void AddChild(ClipperPolyNode child)
{
int cnt = Children.Count;
Children.Add(child);
child.Parent = this;
child.Index = cnt;
}
private bool IsHoleNode()
{
bool result = true;
ClipperPolyNode node = Parent;
while (node != null)
{
result = !result;
node = node.Parent;
}
return(result);
}
public void AddPath(List <ClipperIntPoint> path, ClipperJoinType joinType, ClipperEndType endType)
{
var highI = path.Count - 1;
if (highI < 0)
{
return;
}
var newNode = new ClipperPolyNode
{
JoinType = joinType,
EndType = endType
};
//strip duplicate points from path and also get index to the lowest point ...
if (endType == ClipperEndType.ClosedLine || endType == ClipperEndType.ClosedPolygon)
{
while (highI > 0 && path[0] == path[highI])
{
highI--;
}
}
newNode.Polygon.Capacity = highI + 1;
newNode.Polygon.Add(path[0]);
int j = 0, k = 0;
for (var i = 1; i <= highI; i++)
{
if (newNode.Polygon[j] != path[i])
{
j++;
newNode.Polygon.Add(path[i]);
if (path[i].Y > newNode.Polygon[k].Y ||
(path[i].Y == newNode.Polygon[k].Y &&
path[i].X < newNode.Polygon[k].X))
{
k = j;
}
}
}
if (endType == ClipperEndType.ClosedPolygon && j < 2)
{
return;
}
polyNodes.AddChild(newNode);
//if this path's lowest pt is lower than all the others then update m_lowest
if (endType != ClipperEndType.ClosedPolygon)
{
return;
}
if (lowest.X < 0)
{
lowest = new ClipperIntPoint(polyNodes.ChildCount - 1, k);
}
else
{
var ip = polyNodes.Children[(int)lowest.X].Polygon[(int)lowest.Y];
if (newNode.Polygon[k].Y > ip.Y ||
(newNode.Polygon[k].Y == ip.Y &&
newNode.Polygon[k].X < ip.X))
{
lowest = new ClipperIntPoint(polyNodes.ChildCount - 1, k);
}
}
}