Triangle.points constructor

Triangle.points(Vector3 point0, Vector3 point1, Vector3 point2)

Create a triangle by three points.

Implementation 

Triangle.points(Vector3 point0, Vector3 point1, Vector3 point2)
    : _point0 = new Vector3.copy(point0),
      _point1 = new Vector3.copy(point1),
      _point2 = new Vector3.copy(point2);