internal override void Refit(MeshBoundingBoxTreeData data)
{
data.GetBoundingBox(LeafIndex, out BoundingBox);
//Having an ever-so-slight margin allows the hierarchy use a volume metric even for degenerate shapes (consider a flat tessellated plane).
BoundingBox.Max.X += LeafMargin;
BoundingBox.Max.Y += LeafMargin;
BoundingBox.Max.Z += LeafMargin;
BoundingBox.Min.X -= LeafMargin;
BoundingBox.Min.Y -= LeafMargin;
BoundingBox.Min.Z -= LeafMargin;
}
}