Graphics.DrawClosedCurveとは? わかりやすく解説

Graphics.DrawClosedCurve メソッド (Pen, PointF[])

PointF 構造体の配列で定義された、閉じたカーディナル スプラインを描画します。

名前空間: System.Drawing
アセンブリ: System.Drawing (system.drawing.dll 内)
構文構文

Public Sub DrawClosedCurve ( _
    pen As Pen, _
    points As PointF() _
)
Dim instance As Graphics
Dim pen As Pen
Dim points As PointF()

instance.DrawClosedCurve(pen, points)
public void DrawClosedCurve (
    Pen pen,
    PointF[] points
)
public:
void DrawClosedCurve (
    Pen^ pen, 
    array<PointF>^ points
)
public void DrawClosedCurve (
    Pen pen, 
    PointF[] points
)
public function DrawClosedCurve (
    pen : Pen, 
    points : PointF[]
)

パラメータ

pen

曲線の色、幅、および高さを決定する Pen。

points

スプラインを定義する PointF 構造体の配列。

例外例外
例外の種類条件

ArgumentNullException

pen が null 参照 (Visual Basic では Nothing) です。

または

points が null 参照 (Visual Basic では Nothing) です。

解説解説
使用例使用例

次の例は、Windows フォームでの使用を意図してデザインされており、Paint イベント ハンドラのパラメータである PaintEventArgse が必要です。このコードは次のアクションを実行します。

このメソッドは、既定のテンションである 0.5 を使用します。

Public Sub DrawClosedCurvePointF(ByVal
 e As PaintEventArgs)

    ' Create pens.
    Dim redPen As New Pen(Color.Red,
 3)
    Dim greenPen As New
 Pen(Color.Green, 3)

    ' Create points that define curve.
    Dim point1 As New PointF(50.0F,
 50.0F)
    Dim point2 As New PointF(100.0F,
 25.0F)
    Dim point3 As New PointF(200.0F,
 5.0F)
    Dim point4 As New PointF(250.0F,
 50.0F)
    Dim point5 As New PointF(300.0F,
 100.0F)
    Dim point6 As New PointF(350.0F,
 200.0F)
    Dim point7 As New PointF(250.0F,
 250.0F)
    Dim curvePoints As PointF() = {point1,
 point2, point3, point4, _
    point5, point6, point7}

    ' Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints)

    ' Draw closed curve to screen.
    e.Graphics.DrawClosedCurve(greenPen, curvePoints)
End Sub
public void DrawClosedCurvePointF(PaintEventArgs
 e)
{

    // Create pens.
    Pen redPen = new Pen(Color.Red, 3);
    Pen greenPen = new Pen(Color.Green, 3);

    // Create points that define curve.
    PointF point1 = new PointF(50.0F, 50.0F);
    PointF point2 = new PointF(100.0F, 25.0F);
    PointF point3 = new PointF(200.0F, 5.0F);
    PointF point4 = new PointF(250.0F, 50.0F);
    PointF point5 = new PointF(300.0F, 100.0F);
    PointF point6 = new PointF(350.0F, 200.0F);
    PointF point7 = new PointF(250.0F, 250.0F);
    PointF[] curvePoints = {point1, point2, point3, point4, point5, point6, point7};

    // Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints);

    // Draw closed curve to screen.
    e.Graphics.DrawClosedCurve(greenPen, curvePoints);
}
public:
   void DrawClosedCurvePointF( PaintEventArgs^ e )
   {
      // Create pens.
      Pen^ redPen = gcnew Pen( Color::Red,3.0f );
      Pen^ greenPen = gcnew Pen( Color::Green,3.0f );

      // Create points that define curve.
      PointF point1 = PointF(50.0F,50.0F);
      PointF point2 = PointF(100.0F,25.0F);
      PointF point3 = PointF(200.0F,5.0F);
      PointF point4 = PointF(250.0F,50.0F);
      PointF point5 = PointF(300.0F,100.0F);
      PointF point6 = PointF(350.0F,200.0F);
      PointF point7 = PointF(250.0F,250.0F);
      array<PointF>^ curvePoints = {point1,point2,point3,point4,point5,point6
,point7};

      // Draw lines between original points to screen.
      e->Graphics->DrawLines( redPen, curvePoints );

      // Draw closed curve to screen.
      e->Graphics->DrawClosedCurve( greenPen, curvePoints );
   }
プラットフォームプラットフォーム
バージョン情報バージョン情報
参照参照

Graphics.DrawClosedCurve メソッド (Pen, Point[], Single, FillMode)

指定したテンションを使用して、Point 構造体の配列で定義された、閉じたカーディナル スプラインを描画します。

名前空間: System.Drawing
アセンブリ: System.Drawing (system.drawing.dll 内)
構文構文

Public Sub DrawClosedCurve ( _
    pen As Pen, _
    points As Point(), _
    tension As Single, _
    fillmode As FillMode _
)
Dim instance As Graphics
Dim pen As Pen
Dim points As Point()
Dim tension As Single
Dim fillmode As FillMode

instance.DrawClosedCurve(pen, points, tension, fillmode)
public void DrawClosedCurve (
    Pen pen,
    Point[] points,
    float tension,
    FillMode fillmode
)
public:
void DrawClosedCurve (
    Pen^ pen, 
    array<Point>^ points, 
    float tension, 
    FillMode fillmode
)
public void DrawClosedCurve (
    Pen pen, 
    Point[] points, 
    float tension, 
    FillMode fillmode
)
public function DrawClosedCurve (
    pen : Pen, 
    points : Point[], 
    tension : float, 
    fillmode : FillMode
)

パラメータ

pen

曲線の色、幅、および高さを決定する Pen。

points

スプラインを定義する Point 構造体の配列。

tension

曲線のテンションを指定する 0.0F 以上の値。

fillmode

曲線を塗りつぶす方法を決定する FillMode 列挙体のメンバ。このパラメータは必須ですが、無視されます。

例外例外
例外の種類条件

ArgumentNullException

pen が null 参照 (Visual Basic では Nothing) です。

または

points が null 参照 (Visual Basic では Nothing) です。

解説解説
使用例使用例

次の例は、Windows フォームでの使用を意図してデザインされており、Paint イベント ハンドラのパラメータである PaintEventArgse が必要です。このコードは次のアクションを実行します。

このメソッドは、1.0 のテンションを使用し、塗りつぶしモードを FillMode.Alternate に設定します。

Public Sub DrawClosedCurvePointTension(ByVal
 e As PaintEventArgs)

    ' Create pens.
    Dim redPen As New Pen(Color.Red,
 3)
    Dim greenPen As New
 Pen(Color.Green, 3)

    ' Create points that define curve.
    Dim point1 As New Point(50,
 50)
    Dim point2 As New Point(100,
 25)
    Dim point3 As New Point(200,
 5)
    Dim point4 As New Point(250,
 50)
    Dim point5 As New Point(300,
 100)
    Dim point6 As New Point(350,
 200)
    Dim point7 As New Point(250,
 250)
    Dim curvePoints As Point() = {point1, point2,
 point3, point4, _
    point5, point6, point7}

    ' Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints)

    ' Create tension and fill mode.
    Dim tension As Single
 = 1.0F
    Dim aFillMode As FillMode = FillMode.Alternate

    ' Draw closed curve to screen.
    e.Graphics.DrawClosedCurve(greenPen, curvePoints, tension, _
    aFillMode)
End Sub
public void DrawClosedCurvePointTension(PaintEventArgs
 e)
{

    // Create pens.
    Pen redPen = new Pen(Color.Red, 3);
    Pen greenPen = new Pen(Color.Green, 3);

    // Create points that define curve.
    Point point1 = new Point(50, 50);
    Point point2 = new Point(100, 25);
    Point point3 = new Point(200, 5);
    Point point4 = new Point(250, 50);
    Point point5 = new Point(300, 100);
    Point point6 = new Point(350, 200);
    Point point7 = new Point(250, 250);
    Point[] curvePoints = {point1, point2, point3, point4, point5, point6, point7};

    // Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints);

    // Create tension and fill mode.
    float tension = 1.0F;
    FillMode aFillMode = FillMode.Alternate;

    // Draw closed curve to screen.
    e.Graphics.DrawClosedCurve(greenPen, curvePoints, tension, aFillMode);
}
public:
   void DrawClosedCurvePointTension( PaintEventArgs^ e )
   {
      // Create pens.
      Pen^ redPen = gcnew Pen( Color::Red,3.0f );
      Pen^ greenPen = gcnew Pen( Color::Green,3.0f );

      // Create points that define curve.
      Point point1 = Point(50,50);
      Point point2 = Point(100,25);
      Point point3 = Point(200,5);
      Point point4 = Point(250,50);
      Point point5 = Point(300,100);
      Point point6 = Point(350,200);
      Point point7 = Point(250,250);
      array<Point>^ curvePoints = {point1,point2,point3,point4,point5,point6
,point7};

      // Draw lines between original points to screen.
      e->Graphics->DrawLines( redPen, curvePoints );

      // Create tension and fill mode.
      float tension = 1.0F;
      FillMode aFillMode = FillMode::Alternate;

      // Draw closed curve to screen.
      e->Graphics->DrawClosedCurve( greenPen, curvePoints, tension, aFillMode
 );
   }
プラットフォームプラットフォーム
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参照参照

Graphics.DrawClosedCurve メソッド


Graphics.DrawClosedCurve メソッド (Pen, Point[])

Point 構造体の配列で定義された、閉じたカーディナル スプラインを描画します。

名前空間: System.Drawing
アセンブリ: System.Drawing (system.drawing.dll 内)
構文構文

Public Sub DrawClosedCurve ( _
    pen As Pen, _
    points As Point() _
)
Dim instance As Graphics
Dim pen As Pen
Dim points As Point()

instance.DrawClosedCurve(pen, points)
public void DrawClosedCurve (
    Pen pen,
    Point[] points
)
public:
void DrawClosedCurve (
    Pen^ pen, 
    array<Point>^ points
)
public void DrawClosedCurve (
    Pen pen, 
    Point[] points
)
public function DrawClosedCurve (
    pen : Pen, 
    points : Point[]
)

パラメータ

pen

曲線の色、幅、および高さを決定する Pen。

points

スプラインを定義する Point 構造体の配列。

例外例外
例外の種類条件

ArgumentNullException

pen が null 参照 (Visual Basic では Nothing) です。

または

points が null 参照 (Visual Basic では Nothing) です。

解説解説
使用例使用例

次の例は、Windows フォームでの使用を意図してデザインされており、Paint イベント ハンドラのパラメータである PaintEventArgse が必要です。このコードは次のアクションを実行します。

このメソッドは、既定のテンションである 0.5 を使用します。

Public Sub DrawClosedCurvePoint(ByVal
 e As PaintEventArgs)

    ' Create pens.
    Dim redPen As New Pen(Color.Red,
 3)
    Dim greenPen As New
 Pen(Color.Green, 3)

    ' Create points that define curve.
    Dim point1 As New Point(50,
 50)
    Dim point2 As New Point(100,
 25)
    Dim point3 As New Point(200,
 5)
    Dim point4 As New Point(250,
 50)
    Dim point5 As New Point(300,
 100)
    Dim point6 As New Point(350,
 200)
    Dim point7 As New Point(250,
 250)
    Dim curvePoints As Point() = {point1, point2,
 point3, point4, _
    point5, point6, point7}

    ' Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints)

    ' Draw closed curve to screen.
    e.Graphics.DrawClosedCurve(greenPen, curvePoints)
End Sub
public void DrawClosedCurvePoint(PaintEventArgs
 e)
{
    // Create pens.
    Pen redPen   = new Pen(Color.Red, 3);
    Pen greenPen = new Pen(Color.Green, 3);
             
    // Create points that define curve.
    Point point1 = new Point(50,  50);
    Point point2 = new Point(100,  25);
    Point point3 = new Point(200,   5);
    Point point4 = new Point(250,  50);
    Point point5 = new Point(300, 100);
    Point point6 = new Point(350, 200);
    Point point7 = new Point(250, 250);
    Point[] curvePoints =
             {
                 point1,
                 point2,
                 point3,
                 point4,
                 point5,
                 point6,
                 point7
             };
             
    // Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints);
             
    // Draw closed curve to screen.
    e.Graphics.DrawClosedCurve(greenPen, curvePoints);
}
public:
   void DrawClosedCurvePoint( PaintEventArgs^ e )
   {

      // Create pens.
      Pen^ redPen = gcnew Pen( Color::Red,3.0f );
      Pen^ greenPen = gcnew Pen( Color::Green,3.0f );

      // Create points that define curve.
      Point point1 = Point(50,50);
      Point point2 = Point(100,25);
      Point point3 = Point(200,5);
      Point point4 = Point(250,50);
      Point point5 = Point(300,100);
      Point point6 = Point(350,200);
      Point point7 = Point(250,250);
      array<Point>^ curvePoints = {point1,point2,point3,point4,point5,point6
,point7};

      // Draw lines between original points to screen.
      e->Graphics->DrawLines( redPen, curvePoints );

      // Draw closed curve to screen.
      e->Graphics->DrawClosedCurve( greenPen, curvePoints );
   }
プラットフォームプラットフォーム
バージョン情報バージョン情報
参照参照

Graphics.DrawClosedCurve メソッド (Pen, PointF[], Single, FillMode)

指定したテンションを使用して、PointF 構造体の配列で定義された、閉じたカーディナル スプラインを描画します。

名前空間: System.Drawing
アセンブリ: System.Drawing (system.drawing.dll 内)
構文構文

Public Sub DrawClosedCurve ( _
    pen As Pen, _
    points As PointF(), _
    tension As Single, _
    fillmode As FillMode _
)
Dim instance As Graphics
Dim pen As Pen
Dim points As PointF()
Dim tension As Single
Dim fillmode As FillMode

instance.DrawClosedCurve(pen, points, tension, fillmode)
public void DrawClosedCurve (
    Pen pen,
    PointF[] points,
    float tension,
    FillMode fillmode
)
public:
void DrawClosedCurve (
    Pen^ pen, 
    array<PointF>^ points, 
    float tension, 
    FillMode fillmode
)
public void DrawClosedCurve (
    Pen pen, 
    PointF[] points, 
    float tension, 
    FillMode fillmode
)
public function DrawClosedCurve (
    pen : Pen, 
    points : PointF[], 
    tension : float, 
    fillmode : FillMode
)

パラメータ

pen

曲線の色、幅、および高さを決定する Pen。

points

スプラインを定義する PointF 構造体の配列。

tension

曲線のテンションを指定する 0.0F 以上の値。

fillmode

曲線を塗りつぶす方法を決定する FillMode 列挙体のメンバ。このパラメータは必須ですが、無視されます。

例外例外
例外の種類条件

ArgumentNullException

pen が null 参照 (Visual Basic では Nothing) です。

または

points が null 参照 (Visual Basic では Nothing) です。

解説解説
使用例使用例

次の例は、Windows フォームでの使用を意図してデザインされており、Paint イベント ハンドラのパラメータである PaintEventArgse が必要です。このコードは次のアクションを実行します。

このメソッドは、1.0 のテンションを使用し、塗りつぶしモードを FillMode.Alternate に設定します。

Public Sub DrawClosedCurvePointFTension(ByVal
 e As PaintEventArgs)

    ' Create pens.
    Dim redPen As New Pen(Color.Red,
 3)
    Dim greenPen As New
 Pen(Color.Green, 3)

    ' Create points that define curve.
    Dim point1 As New PointF(50.0F,
 50.0F)
    Dim point2 As New PointF(100.0F,
 25.0F)
    Dim point3 As New PointF(200.0F,
 5.0F)
    Dim point4 As New PointF(250.0F,
 50.0F)
    Dim point5 As New PointF(300.0F,
 100.0F)
    Dim point6 As New PointF(350.0F,
 200.0F)
    Dim point7 As New PointF(250.0F,
 250.0F)
    Dim curvePoints As PointF() = {point1,
 point2, point3, point4, _
    point5, point6, point7}

    ' Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints)

    ' Create tension and fill mode.
    Dim tension As Single
 = 1.0F
    Dim aFillMode As FillMode = FillMode.Alternate

    ' Draw closed curve to screen.
    e.Graphics.DrawClosedCurve(greenPen, curvePoints, tension, _
    aFillMode)
End Sub
public void DrawClosedCurvePointFTension(PaintEventArgs
 e)
{

    // Create pens.
    Pen redPen = new Pen(Color.Red, 3);
    Pen greenPen = new Pen(Color.Green, 3);

    // Create points that define curve.
    PointF point1 = new PointF(50.0F, 50.0F);
    PointF point2 = new PointF(100.0F, 25.0F);
    PointF point3 = new PointF(200.0F, 5.0F);
    PointF point4 = new PointF(250.0F, 50.0F);
    PointF point5 = new PointF(300.0F, 100.0F);
    PointF point6 = new PointF(350.0F, 200.0F);
    PointF point7 = new PointF(250.0F, 250.0F);
    PointF[] curvePoints = {point1, point2, point3, point4, point5, point6, point7};

    // Draw lines between original points to screen.
    e.Graphics.DrawLines(redPen, curvePoints);

    // Create tension and fill mode.
    float tension = 1.0F;
    FillMode aFillMode = FillMode.Alternate;

    // Draw closed curve to screen.
    e.Graphics.DrawClosedCurve(greenPen, curvePoints, tension, aFillMode);
}
public:
   void DrawClosedCurvePointFTension( PaintEventArgs^ e )
   {
      // Create pens.
      Pen^ redPen = gcnew Pen( Color::Red,3.0f );
      Pen^ greenPen = gcnew Pen( Color::Green,3.0f );

      // Create points that define curve.
      PointF point1 = PointF(50.0F,50.0F);
      PointF point2 = PointF(100.0F,25.0F);
      PointF point3 = PointF(200.0F,5.0F);
      PointF point4 = PointF(250.0F,50.0F);
      PointF point5 = PointF(300.0F,100.0F);
      PointF point6 = PointF(350.0F,200.0F);
      PointF point7 = PointF(250.0F,250.0F);
      array<PointF>^ curvePoints = {point1,point2,point3,point4,point5,point6
,point7};

      // Draw lines between original points to screen.
      e->Graphics->DrawLines( redPen, curvePoints );

      // Create tension and fill mode.
      float tension = 1.0F;
      FillMode aFillMode = FillMode::Alternate;

      // Draw closed curve to screen.
      e->Graphics->DrawClosedCurve( greenPen, curvePoints, tension, aFillMode
 );
   }
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