Spline class is Cardinal spline curve, and the class which recorded four control points: m_startControlPoint, m_startPoint, m_endPoint, m_endControlPoint, respectively, the corresponding sequence Pk-1, Pk, Pk+1, Pk+2, the Cardinal is more than a line to the simulation curve, we get 20 points here, so between the Pk and Pk+1, 20 sample points, with the draw line method in order to link these points, and even into the curve segment Cardinal is we want the curve

CardinalTest.txt

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