static void DrawBezier(Gdi::Graphics g, Vector2 p1, Vector2 q, Vector2 p2)
{
const int N = 100;
Vector2 pp1 = p1;
for (int i = 1; i <= N; i++)
{
double t = (1.0 / N) * i;
Vector2 pp2 = t * t * p2 + 2 * t * (1 - t) * q + (1 - t) * (1 - t) * p1;
g.DrawLine(Gdi::Pens.Lime, pp1.ToPointF(), pp2.ToPointF());
pp1 = pp2;
}
}
public void Draw(Gdi::Graphics g)
{
g.Clear(Gdi::Color.Transparent);
g.DrawLine(Gdi::Pens.Blue, this.p1.ToPointF(), this.q1.ToPointF());
g.DrawLine(Gdi::Pens.Blue, this.p2.ToPointF(), this.q1.ToPointF());
g.DrawLine(Gdi::Pens.Blue, this.p2.ToPointF(), this.q2.ToPointF());
g.DrawLine(Gdi::Pens.Blue, this.p3.ToPointF(), this.q2.ToPointF());
g.DrawLine(Gdi::Pens.Blue, this.p3.ToPointF(), this.q3.ToPointF());
g.DrawLine(Gdi::Pens.Blue, this.p4.ToPointF(), this.q3.ToPointF());
g.DrawLine(Gdi::Pens.Blue, this.p4.ToPointF(), this.q4.ToPointF());
g.DrawLine(Gdi::Pens.Blue, this.p1.ToPointF(), this.q4.ToPointF());
DrawBezier(g, this.p1, this.q1, this.p2);
DrawBezier(g, this.p2, this.q2, this.p3);
DrawBezier(g, this.p3, this.q3, this.p4);
DrawBezier(g, this.p4, this.q4, this.p1);
DrawControlPoint(g, this.p1);
DrawControlPoint(g, this.p2);
DrawControlPoint(g, this.p3);
DrawControlPoint(g, this.p4);
DrawControlPoint(g, this.q1);
DrawControlPoint(g, this.q2);
DrawControlPoint(g, this.q3);
DrawControlPoint(g, this.q4);
}