internal void computeVolume(SSBVHNodeAdaptor <GO> nAda)
{
box = nAda.boundingBox(gobjects[0]);
for (int i = 1; i < gobjects.Count; i++)
{
expandVolume(nAda, nAda.boundingBox(gobjects[i]));
}
}
public void addObject(GO newOb)
{
SSAABB box = nAda.boundingBox(newOb);
float boxSAH = ssBVHNode <GO> .SA(ref box);
rootBVH.addObject(nAda, newOb, ref box, boxSAH);
}
// TODO: will need to calculate center of AABB
internal void splitNode(SSBVHNodeAdaptor <GO> nAda)
{
// second, decide which axis to split on, and sort..
List <GO> splitlist = gobjects;
splitlist.ForEach(o => nAda.unmapObject(o));
int center = (int)(splitlist.Count / 2); // find the center object
SplitAxisOpt <GO> bestSplit = eachAxis.Min((axis) => {
var orderedlist = new List <GO>(splitlist);
switch (axis)
{
case Axis.X:
orderedlist.Sort(delegate(GO go1, GO go2) { return(nAda.boundingBox(go1).Center().X.CompareTo(nAda.boundingBox(go2).Center().X)); });
break;
case Axis.Y:
orderedlist.Sort(delegate(GO go1, GO go2) { return(nAda.boundingBox(go1).Center().Y.CompareTo(nAda.boundingBox(go2).Center().Y)); });
break;
case Axis.Z:
orderedlist.Sort(delegate(GO go1, GO go2) { return(nAda.boundingBox(go1).Center().Z.CompareTo(nAda.boundingBox(go2).Center().Z)); });
break;
default:
throw new NotImplementedException("unknown split axis: " + axis.ToString());
}
var left_s = orderedlist.GetRange(0, center);
var right_s = orderedlist.GetRange(center, splitlist.Count - center);
float SAH = SAofList(nAda, left_s) * left_s.Count + SAofList(nAda, right_s) * right_s.Count;
return(new SplitAxisOpt <GO>(SAH, axis, left_s, right_s));
});
// perform the split
gobjects = null;
this.left = new ssBVHNode <GO>(nAda.BVH, this, bestSplit.left, bestSplit.axis, this.depth + 1); // Split the Hierarchy to the left
this.right = new ssBVHNode <GO>(nAda.BVH, this, bestSplit.right, bestSplit.axis, this.depth + 1); // Split the Hierarchy to the right
}
internal static SSAABB AABBofOBJ(SSBVHNodeAdaptor <GO> nAda, GO obj)
{
return(nAda.boundingBox(obj));
}
