void InvertSub()
{
Queue <List <PolygonTreeNode> > queue = new Queue <List <PolygonTreeNode> >();
queue.Enqueue(new List <PolygonTreeNode>()
{
this
});
while (queue.Count > 0)
{
List <PolygonTreeNode> children = queue.Dequeue();
int l = children.Count;
for (int j = 0; j < l; j++)
{
PolygonTreeNode node = children[j];
if (node.Polygon != null)
{
node.Polygon = node.Polygon.Flipped();
}
queue.Enqueue(node.Children);
}
}
}
public List <Polygon> GetPolygons()
{
List <Polygon> result = new List <Polygon>();
Queue <List <PolygonTreeNode> > queue = new Queue <List <PolygonTreeNode> >();
queue.Enqueue(new List <PolygonTreeNode>()
{
this
});
while (queue.Count > 0)
{
List <PolygonTreeNode> children = queue.Dequeue();
int l = children.Count;
for (int j = 0; j < l; j++)
{
PolygonTreeNode node = children[j];
if (node.Polygon != null)
{
result.Add(node.Polygon);
}
else
{
queue.Enqueue(node.Children);
}
}
}
return(result);
}
public PolygonTreeNode AddChild(Polygon polygon)
{
PolygonTreeNode NewChildNode = new PolygonTreeNode();
NewChildNode.Parent = this;
NewChildNode.Polygon = polygon;
Children.Add(NewChildNode);
return(NewChildNode);
}
public Tree(List <Polygon> polygons)
{
PolygonTree = new PolygonTreeNode();
_RootNode = new Node(null);
if (polygons != null)
{
AddPolygons(polygons);
}
}
void RecursivelyInvalidatePolygon()
{
PolygonTreeNode node = this;
while (node.Polygon != null)
{
node.Polygon = null;
if (node.Parent != null)
{
node = node.Parent;
}
}
}
public PolygonTreeNode[] AddChildren(Polygon[] ArrayNewPolygon)
{
PolygonTreeNode[] ArrayAddedNode = new PolygonTreeNode[ArrayNewPolygon.Length];
for (int P = 0; P < ArrayNewPolygon.Length; P++)
{
PolygonTreeNode NewChildNode = new PolygonTreeNode();
NewChildNode.Parent = this;
NewChildNode.Polygon = ArrayNewPolygon[P];
Children.Add(NewChildNode);
ArrayAddedNode[P] = NewChildNode;
}
return(ArrayAddedNode);
}
public void SplitByPlane(Plane plane,
ref List <PolygonTreeNode> coplanarfrontnodes, out PolygonTreeNode CoplanarBackNode,
out PolygonTreeNode FrontNode, out PolygonTreeNode BackNode)
{
CoplanarBackNode = null;
FrontNode = null;
BackNode = null;
if (Children.Count > 0)
{
Queue <List <PolygonTreeNode> > QueueNodeList = null;
List <PolygonTreeNode> ActiveNodeList = Children;
while (true)
{
int l = ActiveNodeList.Count;
for (int j = 0; j < l; j++)
{
PolygonTreeNode node = ActiveNodeList[j];
if (node.Children.Count > 0)
{
if (QueueNodeList == null)
{
QueueNodeList = new Queue <List <PolygonTreeNode> >(node.Children.Count);
}
QueueNodeList.Enqueue(node.Children);
}
else
{
node.SplitPolygonByPlane(plane, ref coplanarfrontnodes, out CoplanarBackNode, out FrontNode, out BackNode);
}
}
if (QueueNodeList != null && QueueNodeList.Count > 0)
{
ActiveNodeList = QueueNodeList.Dequeue();
}
else
{
break;
}
}
}
else
{
SplitPolygonByPlane(plane, ref coplanarfrontnodes, out CoplanarBackNode, out FrontNode, out BackNode);
}
}
void SplitPolygonByPlane(Plane plane,
ref List <PolygonTreeNode> CoplanarFrontNodes, out PolygonTreeNode CoplanarBackNode,
out PolygonTreeNode FrontNode, out PolygonTreeNode BackNode)
{
Polygon ActivePolygon = this.Polygon;
CoplanarBackNode = null;
FrontNode = null;
BackNode = null;
if (ActivePolygon != null)
{
BoundingSphere Sphere = ActivePolygon.BoundingSphere;
double SphereRadius = Sphere.Radius + 1.0e-4;
Vector3 PlaneNormal = plane.Normal;
Vector3 SphereCenter = Sphere.Center;
float d = PlaneNormal.Dot(SphereCenter) - plane.D;
if (d > SphereRadius)
{
FrontNode = this;
}
else if (d < -SphereRadius)
{
BackNode = this;
}
else
{
SplitPolygonResult splitresult;
plane.SplitPolygon(ActivePolygon, out splitresult);
switch (splitresult.Type)
{
case 0:
CoplanarFrontNodes.Add(this);
break;
case 1:
CoplanarBackNode = this;
break;
case 2:
FrontNode = this;
break;
case 3:
BackNode = this;
break;
default:
if (splitresult.Front != null)
{
FrontNode = AddChild(splitresult.Front);
}
if (splitresult.Back != null)
{
BackNode = AddChild(splitresult.Back);
}
break;
}
}
}
}
public void ClipPolygons(List <PolygonTreeNode> clippolygontreenodes, bool alsoRemoveCoplanarFront)
{
Args args = new Args(node: this, polygonTreeNodes: clippolygontreenodes);
Stack <Args> stack = new Stack <Args>();
while (true)
{
var clippingNode = args.Node;
var polygontreenodes = args.PolygonTreeNodes;
if (clippingNode.ActivePlane != null)
{
List <PolygonTreeNode> ListBackNodes = new List <PolygonTreeNode>();
PolygonTreeNode BackNode;
List <PolygonTreeNode> ListFrontNodes = new List <PolygonTreeNode>();
PolygonTreeNode FrontNode;
PolygonTreeNode CoplanarBackNode;
Plane plane = clippingNode.ActivePlane;
int numpolygontreenodes = polygontreenodes.Count;
for (var i = 0; i < numpolygontreenodes; i++)
{
PolygonTreeNode polyNode = polygontreenodes[i];
if (!polyNode.IsRemoved)
{
if (alsoRemoveCoplanarFront)
{
polyNode.SplitByPlane(plane, ref ListBackNodes, out CoplanarBackNode, out FrontNode, out BackNode);
}
else
{
polyNode.SplitByPlane(plane, ref ListFrontNodes, out CoplanarBackNode, out FrontNode, out BackNode);
}
if (FrontNode != null)
{
ListFrontNodes.Add(FrontNode);
}
if (BackNode != null)
{
ListBackNodes.Add(BackNode);
}
if (CoplanarBackNode != null)
{
ListBackNodes.Add(CoplanarBackNode);
}
}
}
if (clippingNode.Front != null && ListFrontNodes.Count > 0)
{
stack.Push(new Args(node: clippingNode.Front, polygonTreeNodes: ListFrontNodes));
}
int numbacknodes = ListBackNodes.Count;
if (clippingNode.Back != null && numbacknodes > 0)
{
stack.Push(new Args(node: clippingNode.Back, polygonTreeNodes: ListBackNodes));
}
else if (numbacknodes > 0)
{
// there's nothing behind this plane. Delete the nodes behind this plane:
for (int i = 0; i < numbacknodes; i++)
{
ListBackNodes[i].Remove();
}
}
}
if (stack.Count > 0)
{
args = stack.Pop();
}
else
{
break;
}
}
}
