/// <summary>
/// Creates a new box containing the two given ones.
/// </summary>
/// <param name="original">First box.</param>
/// <param name="additional">Second box.</param>
/// <param name="result">A JBBox containing the two given boxes.</param>
public static void CreateMerged(ref TSBBox original, ref TSBBox additional, out TSBBox result)
{
FPVector vector;
FPVector vector2;
FPVector.Min(ref original.min, ref additional.min, out vector2);
FPVector.Max(ref original.max, ref additional.max, out vector);
result.min = vector2;
result.max = vector;
}
/// <summary>
/// Expands a bounding box with the volume 0 by all points
/// given.
/// </summary>
/// <param name="points">A array of JVector.</param>
/// <returns>The resulting bounding box containing all points.</returns>
#region public static JBBox CreateFromPoints(JVector[] points)
public static TSBBox CreateFromPoints(FPVector[] points)
{
FPVector vector3 = new FPVector(FP.MaxValue);
FPVector vector2 = new FPVector(FP.MinValue);
for (int i = 0; i < points.Length; i++)
{
FPVector.Min(ref vector3, ref points[i], out vector3);
FPVector.Max(ref vector2, ref points[i], out vector2);
}
return(new TSBBox(vector3, vector2));
}
public void AddPoint(ref FPVector point)
{
FPVector.Max(ref this.max, ref point, out this.max);
FPVector.Min(ref this.min, ref point, out this.min);
}
/// <summary>
/// Builds the octree.
/// </summary>
#region public void BuildOctree()
public void BuildOctree()
{
// create tri and tri bounding box arrays
triBoxes = new FPBBox[tris.Length];
// create an infinite size root box
rootNodeBox = new FPBBox(new FPVector(FP.PositiveInfinity, FP.PositiveInfinity, FP.PositiveInfinity),
new FPVector(FP.NegativeInfinity, FP.NegativeInfinity, FP.NegativeInfinity));
for (int i = 0; i < tris.Length; i++)
{
FPVector.Min(ref positions[tris[i].I1], ref positions[tris[i].I2], out triBoxes[i].min);
FPVector.Min(ref positions[tris[i].I0], ref triBoxes[i].min, out triBoxes[i].min);
FPVector.Max(ref positions[tris[i].I1], ref positions[tris[i].I2], out triBoxes[i].max);
FPVector.Max(ref positions[tris[i].I0], ref triBoxes[i].max, out triBoxes[i].max);
// get size of the root box
FPVector.Min(ref rootNodeBox.min, ref triBoxes[i].min, out rootNodeBox.min);
FPVector.Max(ref rootNodeBox.max, ref triBoxes[i].max, out rootNodeBox.max);
}
List <BuildNode> buildNodes = new List <BuildNode>();
buildNodes.Add(new BuildNode());
buildNodes[0].box = rootNodeBox;
FPBBox[] children = new FPBBox[8];
for (int triNum = 0; triNum < tris.Length; triNum++)
{
int nodeIndex = 0;
FPBBox box = rootNodeBox;
while (box.Contains(ref triBoxes[triNum]) == FPBBox.ContainmentType.Contains)
{
int childCon = -1;
for (int i = 0; i < 8; ++i)
{
CreateAABox(ref box, (EChild)i, out children[i]);
if (children[i].Contains(ref triBoxes[triNum]) == FPBBox.ContainmentType.Contains)
{
// this box contains the tri, it can be the only one that does,
// so we can stop our child search now and recurse into it
childCon = i;
break;
}
}
// no child contains this tri completely, so it belong in this node
if (childCon == -1)
{
buildNodes[nodeIndex].triIndices.Add(triNum);
break;
}
else
{
// do we already have this child
int childIndex = -1;
for (int index = 0; index < buildNodes[nodeIndex].nodeIndices.Count; ++index)
{
if (buildNodes[buildNodes[nodeIndex].nodeIndices[index]].childType == childCon)
{
childIndex = index;
break;
}
}
if (childIndex == -1)
{
// nope create child
BuildNode parentNode = buildNodes[nodeIndex];
BuildNode newNode = new BuildNode();
newNode.childType = childCon;
newNode.box = children[childCon];
buildNodes.Add(newNode);
nodeIndex = buildNodes.Count - 1;
box = children[childCon];
parentNode.nodeIndices.Add(nodeIndex);
}
else
{
nodeIndex = buildNodes[nodeIndex].nodeIndices[childIndex];
box = children[childCon];
}
}
}
}
// now convert to the tighter Node from BuildNodes
nodes = new Node[buildNodes.Count];
nodeStackPool = new ArrayResourcePool <ushort>(buildNodes.Count);
//nodeStack = new UInt16[buildNodes.Count];
for (int i = 0; i < nodes.Length; i++)
{
nodes[i].nodeIndices = new UInt16[buildNodes[i].nodeIndices.Count];
for (int index = 0; index < nodes[i].nodeIndices.Length; ++index)
{
nodes[i].nodeIndices[index] = (UInt16)buildNodes[i].nodeIndices[index];
}
nodes[i].triIndices = new int[buildNodes[i].triIndices.Count];
buildNodes[i].triIndices.CopyTo(nodes[i].triIndices);
nodes[i].box = buildNodes[i].box;
}
buildNodes.Clear(); buildNodes = null;
}