//声明: PolyBezier( DC: HDC; {设备环境句柄} const Points; {点数组} Count: DWORD {数组元素个数} ): BOOL;
//一条贝塞尔线最少要有 4 个点 procedure TForm1.FormPaint(Sender: TObject); var ps: array[0..3] of TPoint; begin ps[0].X := 10; ps[0].Y := 50; ps[1].X := 40; ps[1].Y := 90; ps[2].X := 80; ps[2].Y := 10; ps[3].X := 110; ps[3].Y := 50; PolyBezier(Canvas.Handle, ps, 4); Ellipse(Canvas.Handle, ps[0].X, ps[0].Y, ps[0].X+4, ps[0].Y+4); Ellipse(Canvas.Handle, ps[1].X, ps[1].Y, ps[1].X+4, ps[1].Y+4); Ellipse(Canvas.Handle, ps[2].X, ps[2].Y, ps[2].X+4, ps[2].Y+4); Ellipse(Canvas.Handle, ps[3].X, ps[3].Y, ps[3].X+4, ps[3].Y+4); end;
//效果图:
//连续的贝塞尔线会把前一个终止点当作起始点 procedure TForm1.FormPaint(Sender: TObject); var ps: array[0..6] of TPoint; begin ps[0].X := 10; ps[0].Y := 50; ps[1].X := 40; ps[1].Y := 90; ps[2].X := 80; ps[2].Y := 10; ps[3].X := 110; ps[3].Y := 50; ps[4].X := 140; ps[4].Y := 10; ps[5].X := 180; ps[5].Y := 90; ps[6].X := 210; ps[6].Y := 50; PolyBezier(Canvas.Handle, ps, 7); end; //效果图: