Graphics.DrawPolygonとは? わかりやすく解説

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

PointF 構造体配列定義され多角形描画ます。

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

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

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

パラメータ

pen

多角形の色、幅、およびスタイル決定する Pen

points

多角形頂点を表す PointF 構造体配列

例外例外
例外種類条件

ArgumentNullException

pennull 参照 (Visual Basic では Nothing) です。

または

pointsnull 参照 (Visual Basic では Nothing) です。

解説解説
使用例使用例

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

Public Sub DrawPolygonPointF(ByVal
 e As PaintEventArgs)

    ' Create pen.
    Dim blackPen As New
 Pen(Color.Black, 3)

    ' Create points that define polygon.
    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 polygon curve to screen.
    e.Graphics.DrawPolygon(blackPen, curvePoints)
End Sub
public void DrawPolygonPointF(PaintEventArgs
 e)
{
             
    // Create pen.
    Pen blackPen = new Pen(Color.Black, 3);
             
    // Create points that define polygon.
    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 polygon curve to screen.
    e.Graphics.DrawPolygon(blackPen, curvePoints);
}
public:
   void DrawPolygonPointF( PaintEventArgs^ e )
   {
      // Create pen.
      Pen^ blackPen = gcnew Pen( Color::Black,3.0f );

      // Create points that define polygon.
      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 polygon curve to screen.
      e->Graphics->DrawPolygon( blackPen, curvePoints );
   }
public void DrawPolygonPointF(PaintEventArgs
 e) 
{
    // Create pen.
    Pen blackPen =  new Pen(Color.get_Black(), 3);

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

    // Draw polygon curve to screen.
    e.get_Graphics().DrawPolygon(blackPen, curvePoints);
} //DrawPolygonPointF
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.DrawPolygon メソッド (Pen, Point[])

Point 構造体配列定義され多角形描画ます。

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

Public Sub DrawPolygon ( _
    pen As Pen, _
    points As Point() _
)
public void DrawPolygon (
    Pen pen,
    Point[] points
)
public:
void DrawPolygon (
    Pen^ pen, 
    array<Point>^ points
)
public void DrawPolygon (
    Pen pen, 
    Point[] points
)
public function DrawPolygon (
    pen : Pen, 
    points : Point[]
)

パラメータ

pen

多角形の色、幅、およびスタイル決定する Pen

points

多角形頂点を表す Point 構造体配列

例外例外
例外種類条件

ArgumentNullException

pennull 参照 (Visual Basic では Nothing) です。

解説解説
使用例使用例

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

Public Sub DrawPolygonPoint(ByVal
 e As PaintEventArgs)

    ' Create pen.
    Dim blackPen As New
 Pen(Color.Black, 3)

    ' Create points that define polygon.
    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 polygon to screen.
    e.Graphics.DrawPolygon(blackPen, curvePoints)
End Sub
public void DrawPolygonPoint(PaintEventArgs
 e)
{
             
    // Create pen.
    Pen blackPen = new Pen(Color.Black, 3);
             
    // Create points that define polygon.
    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 polygon to screen.
    e.Graphics.DrawPolygon(blackPen, curvePoints);
}
public:
   void DrawPolygonPoint( PaintEventArgs^ e )
   {
      // Create pen.
      Pen^ blackPen = gcnew Pen( Color::Black,3.0f );

      // Create points that define polygon.
      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 polygon to screen.
      e->Graphics->DrawPolygon( blackPen, curvePoints );
   }
public void DrawPolygonPoint(PaintEventArgs
 e) 
{
    // Create pen.
    Pen blackPen =  new Pen(Color.get_Black(), 3);

    // Create points that define polygon.
    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 polygon to screen.
    e.get_Graphics().DrawPolygon(blackPen, curvePoints);
} //DrawPolygonPoint
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.DrawPolygon メソッド



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