private TrailCurveDrawCtrl()
{
trajs_num = 2;
curMotion = new HandMotion();
for (int i = 0; i < trajs_num; ++i)
{
curMotion.Add(new Trajectory());
}
studyMotion = new HandMotion();
for (int i = 0; i < trajs_num; ++i)
{
studyMotion.Add(new Trajectory());
}
}
