public void PointMove(
     Vector3 pointStart,
     Vector3 pointEnd,
     float frictionFactor,
     float bumpFactor,
     uint recurseLevel,
     out Vector3 pointResult)
 {
     tree.PointMove(pointStart, pointEnd, vertices,
                    frictionFactor, bumpFactor, recurseLevel,
                    out pointResult);
 }