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  • GDI+ 学习记录(17): 曲线 Curve

    //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;
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  • 原文地址:https://www.cnblogs.com/del/p/1017375.html
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