public override void rewind(int idx)
{
m_poly.rewind(0);
m_idx = idx;
m_curve.approximation_scale(1);
switch (idx)
{
default:
case 0: // Control line 1
m_curve.init(m_poly.GetXN(0), m_poly.GetYN(0),
(m_poly.GetXN(0) + m_poly.GetXN(1)) * 0.5,
(m_poly.GetYN(0) + m_poly.GetYN(1)) * 0.5,
(m_poly.GetXN(0) + m_poly.GetXN(1)) * 0.5,
(m_poly.GetYN(0) + m_poly.GetYN(1)) * 0.5,
m_poly.GetXN(1), m_poly.GetYN(1));
m_stroke.rewind(0);
break;
case 1: // Control line 2
m_curve.init(m_poly.GetXN(2), m_poly.GetYN(2),
(m_poly.GetXN(2) + m_poly.GetXN(3)) * 0.5,
(m_poly.GetYN(2) + m_poly.GetYN(3)) * 0.5,
(m_poly.GetXN(2) + m_poly.GetXN(3)) * 0.5,
(m_poly.GetYN(2) + m_poly.GetYN(3)) * 0.5,
m_poly.GetXN(3), m_poly.GetYN(3));
m_stroke.rewind(0);
break;
case 2: // Curve itself
m_curve.init(m_poly.GetXN(0), m_poly.GetYN(0),
m_poly.GetXN(1), m_poly.GetYN(1),
m_poly.GetXN(2), m_poly.GetYN(2),
m_poly.GetXN(3), m_poly.GetYN(3));
m_stroke.rewind(0);
break;
case 3: // Point 1
m_ellipse.init(m_poly.GetXN(0), m_poly.GetYN(0), point_radius(), point_radius(), 20);
m_ellipse.rewind(0);
break;
case 4: // Point 2
m_ellipse.init(m_poly.GetXN(1), m_poly.GetYN(1), point_radius(), point_radius(), 20);
m_ellipse.rewind(0);
break;
case 5: // Point 3
m_ellipse.init(m_poly.GetXN(2), m_poly.GetYN(2), point_radius(), point_radius(), 20);
m_ellipse.rewind(0);
break;
case 6: // Point 4
m_ellipse.init(m_poly.GetXN(3), m_poly.GetYN(3), point_radius(), point_radius(), 20);
m_ellipse.rewind(0);
break;
}
}
