Delphi GDI+学习记录(17): 曲线

//画曲线var
　g: TGPGraphics;
　p: TGPPen;
　pts: array[0..4] of TGPPoint;
begin
　g := TGPGraphics.Create(Canvas.Handle);
　p := TGPPen.Create(MakeColor(255,0,0),4);
　pts[0].X := 11;　pts[0].Y := 11;
　pts[1].X := 66;　pts[1].Y := 66;
　pts[2].X := 88;　pts[2].Y := 222;
　pts[3].X := 111; pts[3].Y := 111;
　pts[4].X := 222; pts[4].Y := 88;
　g.DrawCurve(p, PGPPoint(@pts), Length(pts));
　p.Free;
　g.Free;
end;

//指定曲度var
　g: TGPGraphics;
　p: TGPPen;
　pts: array[0..4] of TGPPoint;
begin
　g := TGPGraphics.Create(Canvas.Handle);
　p := TGPPen.Create(MakeColor(255,0,0),4);
　pts[0].X := 11;　pts[0].Y := 11;
　pts[1].X := 66;　pts[1].Y := 66;
　pts[2].X := 88;　pts[2].Y := 222;
　pts[3].X := 111; pts[3].Y := 111;
　pts[4].X := 222; pts[4].Y := 88;
　g.DrawCurve(p, PGPPoint(@pts), Length(pts), 0.25); //指定曲度为 0.25; 默认是 0.5
　p.Free;
　g.Free;
end;

//绘制曲线的部分var
　g: TGPGraphics;
　p: TGPPen;
　pts: array[0..4] of TGPPoint;
begin
　g := TGPGraphics.Create(Canvas.Handle);
　p := TGPPen.Create(MakeColor(255,0,0),4);
　pts[0].X := 11;　pts[0].Y := 11;
　pts[1].X := 66;　pts[1].Y := 66;
　pts[2].X := 88;　pts[2].Y := 222;
　pts[3].X := 111; pts[3].Y := 111;
　pts[4].X := 222; pts[4].Y := 88;
　g.DrawCurve(p, PGPPoint(@pts), Length(pts), 1, 2, 0);
　{参数 3 指定从第几个点开始; 参数 4 指示绘制几段; 参数 5 是曲度为 0 时就成了连续的直线}
　p.Free;
　g.Free;
end;

时间： 2024-12-27 14:28:43

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