//------------------------------------------------------------------------
void bezier_ctrl_impl::rewind(unsigned idx)
{
m_idx = idx;
m_curve.approximation_scale(scale());
switch(idx)
{
default:
case 0: // Control line 1
m_curve.init(m_poly.xn(0), m_poly.yn(0),
(m_poly.xn(0) + m_poly.xn(1)) * 0.5,
(m_poly.yn(0) + m_poly.yn(1)) * 0.5,
(m_poly.xn(0) + m_poly.xn(1)) * 0.5,
(m_poly.yn(0) + m_poly.yn(1)) * 0.5,
m_poly.xn(1), m_poly.yn(1));
m_stroke.rewind(0);
break;
case 1: // Control line 2
m_curve.init(m_poly.xn(2), m_poly.yn(2),
(m_poly.xn(2) + m_poly.xn(3)) * 0.5,
(m_poly.yn(2) + m_poly.yn(3)) * 0.5,
(m_poly.xn(2) + m_poly.xn(3)) * 0.5,
(m_poly.yn(2) + m_poly.yn(3)) * 0.5,
m_poly.xn(3), m_poly.yn(3));
m_stroke.rewind(0);
break;
case 2: // Curve itself
m_curve.init(m_poly.xn(0), m_poly.yn(0),
m_poly.xn(1), m_poly.yn(1),
m_poly.xn(2), m_poly.yn(2),
m_poly.xn(3), m_poly.yn(3));
m_stroke.rewind(0);
break;
case 3: // Point 1
m_ellipse.init(m_poly.xn(0), m_poly.yn(0), point_radius(), point_radius(), 20);
m_ellipse.rewind(0);
break;
case 4: // Point 2
m_ellipse.init(m_poly.xn(1), m_poly.yn(1), point_radius(), point_radius(), 20);
m_ellipse.rewind(0);
break;
case 5: // Point 3
m_ellipse.init(m_poly.xn(2), m_poly.yn(2), point_radius(), point_radius(), 20);
m_ellipse.rewind(0);
break;
case 6: // Point 4
m_ellipse.init(m_poly.xn(3), m_poly.yn(3), point_radius(), point_radius(), 20);
m_ellipse.rewind(0);
break;
}
}
//------------------------------------------------------------------------
void curve3_ctrl_impl::rewind(unsigned idx)
{
m_idx = idx;
switch(idx)
{
default:
case 0: // Control line
m_curve.init(m_poly.xn(0), m_poly.yn(0),
(m_poly.xn(0) + m_poly.xn(1)) * 0.5,
(m_poly.yn(0) + m_poly.yn(1)) * 0.5,
m_poly.xn(1), m_poly.yn(1));
m_stroke.rewind(0);
break;
case 1: // Control line 2
m_curve.init(m_poly.xn(1), m_poly.yn(1),
(m_poly.xn(1) + m_poly.xn(2)) * 0.5,
(m_poly.yn(1) + m_poly.yn(2)) * 0.5,
m_poly.xn(2), m_poly.yn(2));
m_stroke.rewind(0);
break;
case 2: // Curve itself
m_curve.init(m_poly.xn(0), m_poly.yn(0),
m_poly.xn(1), m_poly.yn(1),
m_poly.xn(2), m_poly.yn(2));
m_stroke.rewind(0);
break;
case 3: // Point 1
m_ellipse.init(m_poly.xn(0), m_poly.yn(0), point_radius(), point_radius(), 20);
m_ellipse.rewind(0);
break;
case 4: // Point 2
m_ellipse.init(m_poly.xn(1), m_poly.yn(1), point_radius(), point_radius(), 20);
m_ellipse.rewind(0);
break;
case 5: // Point 3
m_ellipse.init(m_poly.xn(2), m_poly.yn(2), point_radius(), point_radius(), 20);
m_ellipse.rewind(0);
break;
}
}