/**
* FindLightBlock
*
* @param tree
* @param ray
* @param maxt
* @return boolean
*/
private bool FindLightBlock (OctNode tree, Ray ray, double maxt)
{
OctNode current = tree.FindTreeNode (ray.GetOrigin ());
IntersectPt test = new IntersectPt ();
Point testpt = new Point ();
while (current != null) {
ObjNode currentnode = current.GetList ();
while (currentnode != null) {
bool found = false;
if (currentnode.GetObj ().GetCachePt ().GetID () == ray.GetID ()) {
found = true;
}
if (!found) {
test.SetOrigID (0);
if (currentnode.GetObj ().Intersect (ray, test)) {
if (test.GetT () < maxt) {
return (true);
}
}
}
currentnode = currentnode.Next ();
}
OctNode adjacent = current.Intersect (ray, testpt, test.GetThreshold ());
if (adjacent == null) {
current = null;
} else {
current = adjacent.FindTreeNode (testpt);
}
}
return (false);
}
