public Engine()
{
_scene = new Scene();
_mod = new int[64];
_stack = new KdStackItem[64];
for (int i = 0; i < 64; i++)
_stack[i] = new KdStackItem();
}
public void Build(Scene scene)
{
foreach (Primitive p in scene.Primitives) {
Root.Add(p);
}
int prims = scene.Primitives.Count;
AxisAlignedBox sBox = scene.Extends;
_list = null;
_sortedList = null;
Subdivide(Root, sBox, 0, prims);
}