public bool InsideBoundingBox(Heightmap.Tri TestTriangle, BoundingSquare Box)
{
bool inside = false;
if (TestTriangle.p1.X >= Box.UpperLeft.X && TestTriangle.p1.X <= Box.UpperRight.X)
{
if (TestTriangle.p1.Z >= Box.LowerLeft.Z && TestTriangle.p1.X <= Box.UpperLeft.Z)
{
inside = true;
}
}
if (TestTriangle.p2.X >= Box.UpperLeft.X && TestTriangle.p2.X <= Box.UpperRight.X)
{
if (TestTriangle.p2.Z >= Box.LowerLeft.Z && TestTriangle.p2.X <= Box.UpperLeft.Z)
{
inside = true;
}
}
if (TestTriangle.p3.X >= Box.UpperLeft.X && TestTriangle.p3.X <= Box.UpperRight.X)
{
if (TestTriangle.p3.Z >= Box.LowerLeft.Z && TestTriangle.p3.X <= Box.UpperLeft.Z)
{
inside = true;
}
}
return(inside);
}
public void CreateNode(BoundingSquare Bounding, int ParentID, int NodeID, Heightmap.Tri[] Triangle)
{
NodeType nodeType;
float Width;
float Height;
Width = Bounding.UpperRight.X - Bounding.UpperLeft.X; //X
Height = Bounding.UpperLeft.Z - Bounding.LowerLeft.Z; //Z
if (Width / 2 == (2 * (int)CellSize.X))
{
nodeType = NodeType.Leaf;
}
else
{
nodeType = NodeType.Node;
}
Node node = new Node();
node.ID = NodeID;
node.ParentID = ParentID;
node.BoundingCoordinates.UpperLeft = Bounding.UpperLeft;
node.BoundingCoordinates.UpperRight = Bounding.UpperRight;
node.BoundingCoordinates.LowerLeft = Bounding.LowerLeft;
node.BoundingCoordinates.LowerRight = Bounding.LowerRight;
node.boundingBox = new BoundingBox(new Vector3(node.BoundingCoordinates.LowerLeft.X, Editor.heightmap.lowestPoint, node.BoundingCoordinates.LowerLeft.Z), new Vector3(node.BoundingCoordinates.UpperRight.X, Editor.heightmap.highestPoint, node.BoundingCoordinates.UpperRight.Z));
node.Type = nodeType;
if (nodeType == NodeType.Leaf)
{
int tID;
int o = 0;
float lowestPoint = Editor.heightmap.maxHeight;
float highestPoint = 0f;
for (int y = (int)node.BoundingCoordinates.LowerLeft.Z / (int)CellSize.Y; y < ((node.BoundingCoordinates.UpperRight.Z / CellSize.Y) - 0); y++)
{
for (int x = (int)node.BoundingCoordinates.LowerLeft.X / (int)CellSize.X; x < ((node.BoundingCoordinates.UpperRight.X / CellSize.X) - 0); x++)
{
tID = (x + y * (Editor.heightmap.size.X - 1)) * 2;
if (tID >= Triangle.Length - 0)
{
o++;
}
if (tID < Triangle.Length)
{
node.TriangleIDs.Add(tID);
node.TriangleIDs.Add(tID + 1);
if (Triangle[tID].p1.Y > highestPoint)
{
highestPoint = Triangle[tID].p1.Y;
}
if (Triangle[tID].p2.Y > highestPoint)
{
highestPoint = Triangle[tID].p2.Y;
}
if (Triangle[tID].p3.Y > highestPoint)
{
highestPoint = Triangle[tID].p3.Y;
}
if (Triangle[tID].p1.Y < lowestPoint)
{
lowestPoint = Triangle[tID].p1.Y;
}
if (Triangle[tID].p2.Y < lowestPoint)
{
lowestPoint = Triangle[tID].p2.Y;
}
if (Triangle[tID].p3.Y < lowestPoint)
{
lowestPoint = Triangle[tID].p3.Y;
}
if (Triangle[tID + 1].p1.Y > highestPoint)
{
highestPoint = Triangle[tID + 1].p1.Y;
}
if (Triangle[tID + 1].p2.Y > highestPoint)
{
highestPoint = Triangle[tID + 1].p2.Y;
}
if (Triangle[tID + 1].p3.Y > highestPoint)
{
highestPoint = Triangle[tID + 1].p3.Y;
}
if (Triangle[tID + 1].p1.Y < lowestPoint)
{
lowestPoint = Triangle[tID + 1].p1.Y;
}
if (Triangle[tID + 1].p2.Y < lowestPoint)
{
lowestPoint = Triangle[tID + 1].p2.Y;
}
if (Triangle[tID + 1].p3.Y < lowestPoint)
{
lowestPoint = Triangle[tID + 1].p3.Y;
}
}
}
//Determine the height of the bounding box for this Leaf Node
node.boundingBox.Min.Y = lowestPoint;
node.boundingBox.Max.Y = highestPoint;
}
}
else
{
BoundingSquare BoundingBox = new BoundingSquare();
TotalTreeID++;
node.Branches[0] = TotalTreeID;
//LowerLeft
BoundingBox.LowerLeft = Bounding.LowerLeft;
//LowerRight
BoundingBox.LowerRight = Bounding.LowerLeft + ((Bounding.LowerRight - Bounding.LowerLeft) / 2);
//UpperLeft
BoundingBox.UpperLeft = Bounding.LowerLeft + ((Bounding.UpperLeft - Bounding.LowerLeft) / 2);
//UpperRight
BoundingBox.UpperRight = Bounding.LowerLeft + ((Bounding.LowerRight - Bounding.LowerLeft) / 2) + ((Bounding.UpperLeft - Bounding.LowerLeft) / 2);
CreateNode(BoundingBox, NodeID, TotalTreeID, Triangle);
//Determine the height of the bounding box for this Node
if (NodeList[TotalTreeID].boundingBox.Max.Y > node.boundingBox.Max.Y)
{
node.boundingBox.Max.Y = NodeList[TotalTreeID].boundingBox.Max.Y;
}
if (NodeList[TotalTreeID].boundingBox.Min.Y < node.boundingBox.Min.Y)
{
node.boundingBox.Min.Y = NodeList[TotalTreeID].boundingBox.Min.Y;
}
//**************************************************************************
TotalTreeID++;
node.Branches[1] = TotalTreeID;
//LowerLeft
BoundingBox.LowerLeft = Bounding.LowerLeft + ((Bounding.LowerRight - Bounding.LowerLeft) / 2);
//LowerRight
BoundingBox.LowerRight = Bounding.LowerRight;
//UpperLeft
BoundingBox.UpperLeft = Bounding.LowerLeft + ((Bounding.LowerRight - Bounding.LowerLeft) / 2) + ((Bounding.UpperLeft - Bounding.LowerLeft) / 2);
//UpperRight
BoundingBox.UpperRight = Bounding.LowerLeft + ((Bounding.UpperLeft - Bounding.LowerLeft) / 2) + ((Bounding.LowerRight - Bounding.LowerLeft));
CreateNode(BoundingBox, NodeID, TotalTreeID, Triangle);
//Determine the height of the bounding box for this Node
if (NodeList[TotalTreeID].boundingBox.Max.Y > node.boundingBox.Max.Y)
{
node.boundingBox.Max.Y = NodeList[TotalTreeID].boundingBox.Max.Y;
}
if (NodeList[TotalTreeID].boundingBox.Min.Y < node.boundingBox.Min.Y)
{
node.boundingBox.Min.Y = NodeList[TotalTreeID].boundingBox.Min.Y;
}
//**************************************************************************
TotalTreeID++;
node.Branches[2] = TotalTreeID;
//LowerLeft
BoundingBox.LowerLeft = Bounding.LowerLeft + ((Bounding.UpperLeft - Bounding.LowerLeft) / 2);
//LowerRight
BoundingBox.LowerRight = Bounding.LowerLeft + ((Bounding.UpperLeft - Bounding.LowerLeft) / 2)
+ ((Bounding.LowerRight - Bounding.LowerLeft) / 2);
//UpperLeft
BoundingBox.UpperLeft = Bounding.UpperLeft;
//UpperRight
BoundingBox.UpperRight = Bounding.LowerLeft + ((Bounding.LowerRight - Bounding.LowerLeft) / 2) + ((Bounding.UpperLeft - Bounding.LowerLeft));
CreateNode(BoundingBox, NodeID, TotalTreeID, Triangle);
//Determine the height of the bounding box for this Node
if (NodeList[TotalTreeID].boundingBox.Max.Y > node.boundingBox.Max.Y)
{
node.boundingBox.Max.Y = NodeList[TotalTreeID].boundingBox.Max.Y;
}
if (NodeList[TotalTreeID].boundingBox.Min.Y < node.boundingBox.Min.Y)
{
node.boundingBox.Min.Y = NodeList[TotalTreeID].boundingBox.Min.Y;
}
//**************************************************************************
TotalTreeID++;
node.Branches[3] = TotalTreeID;
//LowerLeft
BoundingBox.LowerLeft = Bounding.LowerLeft + ((Bounding.LowerRight - Bounding.LowerLeft) / 2) + ((Bounding.UpperLeft - Bounding.LowerLeft) / 2);
//LowerRight
BoundingBox.LowerRight = Bounding.LowerLeft + ((Bounding.UpperLeft - Bounding.LowerLeft) / 2) + ((Bounding.LowerRight - Bounding.LowerLeft));
//UpperLeft
BoundingBox.UpperLeft = Bounding.LowerLeft + ((Bounding.LowerRight - Bounding.LowerLeft) / 2) + ((Bounding.UpperLeft - Bounding.LowerLeft));
//UpperRight
BoundingBox.UpperRight = Bounding.UpperRight;
CreateNode(BoundingBox, NodeID, TotalTreeID, Triangle);
//Determine the height of the bounding box for this Node
if (NodeList[TotalTreeID].boundingBox.Max.Y > node.boundingBox.Max.Y)
{
node.boundingBox.Max.Y = NodeList[TotalTreeID].boundingBox.Max.Y;
}
if (NodeList[TotalTreeID].boundingBox.Min.Y < node.boundingBox.Min.Y)
{
node.boundingBox.Min.Y = NodeList[TotalTreeID].boundingBox.Min.Y;
}
}
NodeList[NodeID] = node;
//Determine the height of the bounding box for the QuadTree
if (node.boundingBox.Max.Y > boundingBox.Max.Y)
{
boundingBox.Max.Y = node.boundingBox.Max.Y;
}
if (node.boundingBox.Min.Y < boundingBox.Min.Y)
{
boundingBox.Min.Y = node.boundingBox.Min.Y;
}
return;
}
