for (std::vector<aabb3f>::iterator
			i = boxes.begin();
			i != boxes.end(); ++i) {
		aabb3f box = *i;
		box.MinEdge.X -= factor;
		box.MinEdge.Y -= factor;
		box.MinEdge.Z -= factor;
		box.MaxEdge.X += factor;
		box.MaxEdge.Y += factor;
		box.MaxEdge.Z += factor;
	}