docs: public static PointList toPointList(final List<Vector3> vertices) {
  		for (int i=0; i<vertices.size(); i++)
  			if (vertices.get(i)==null) throw new NullPointerException();
  		return new PointList() {
  
  			@Override
  			public Vector3 getPoint(int index) {
  				return vertices.get(index);
  			}
  
  			@Override
  			public int getPointCount() {
  				return vertices.size();
  			}
  		};
  	}