Graphics.DrawCurve 方法

定义

命名空间:

System.Drawing

程序集:

System.Drawing.Common.dll

包:

System.Drawing.Common v9.0.0-preview.7.24405.4

通过指定的 Point 结构数组绘制基数样线。

重载

DrawCurve(Pen, PointF[], Int32, Int32, Single)	使用指定的紧张通过指定的 PointF 结构数组绘制基数样线。 绘图从数组的开头开始偏移。
DrawCurve(Pen, Point[], Int32, Int32, Single)	使用指定的紧张通过指定的 Point 结构数组绘制基数样线。
DrawCurve(Pen, PointF[], Int32, Int32)	通过指定的 PointF 结构数组绘制基数样线。 绘图从数组的开头开始偏移。
DrawCurve(Pen, PointF[], Single)	使用指定的紧张通过指定的 PointF 结构数组绘制基数样线。
DrawCurve(Pen, Point[], Single)	使用指定的紧张通过指定的 Point 结构数组绘制基数样线。
DrawCurve(Pen, PointF[])	通过指定的 PointF 结构数组绘制基数样线。
DrawCurve(Pen, Point[])	通过指定的 Point 结构数组绘制基数样线。

DrawCurve(Pen, PointF[], Int32, Int32, Single)

Source:

Graphics.cs

使用指定的紧张通过指定的 PointF 结构数组绘制基数样线。 绘图从数组的开头开始偏移。

public:
 void DrawCurve(System::Drawing::Pen ^ pen, cli::array <System::Drawing::PointF> ^ points, int offset, int numberOfSegments, float tension);

public void DrawCurve (System.Drawing.Pen pen, System.Drawing.PointF[] points, int offset, int numberOfSegments, float tension);

member this.DrawCurve : System.Drawing.Pen * System.Drawing.PointF[] * int * int * single -> unit

Public Sub DrawCurve (pen As Pen, points As PointF(), offset As Integer, numberOfSegments As Integer, tension As Single)

参数

pen

Pen

确定曲线的颜色、宽度和样式的 Pen。

points

PointF[]

定义样条的 PointF 结构的数组。

offset

Int32

从 points 参数数组中的第一个元素偏移到曲线中的起点。

numberOfSegments

Int32

要包含在曲线中的起始点后的段数。

tension

Single

大于或等于 0.0F 的值，该值指定曲线的紧张度。

例外

ArgumentNullException

pen null。

-或-

points null。

示例

下面的代码示例设计用于 Windows 窗体，它需要 PaintEventArgse，这是 Paint 事件处理程序的参数。 该代码执行以下操作：

• 创建红色和绿色笔。

• 创建七个点来定义曲线。

• 在七点之间绘制六条红色直线，形成不完整的多边形。

• 定义起点偏移量和段数。

• 定义紧张。

• 绘制一条打开的绿色曲线（从第三点开始）到最后五个点。

该方法将紧张度设置为 1.0。

private:
   void DrawCurvePointFSegmentTension( 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 offset, number of segments, and tension.
      int offset = 2;
      int numSegments = 4;
      float tension = 1.0F;

      // Draw curve to screen.
      e->Graphics->DrawCurve( greenPen, curvePoints, offset, numSegments, tension );
   }

private void DrawCurvePointFSegmentTension(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 offset, number of segments, and tension.
    int offset = 2;
    int numSegments = 4;
    float tension = 1.0F;

    // Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, offset, numSegments, tension);
}

Private Sub DrawCurvePointFSegmentTension(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 offset, number of segments, and tension.
    Dim offset As Integer = 2
    Dim numSegments As Integer = 4
    Dim tension As Single = 1.0F

    ' Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, offset, numSegments, _
    tension)
End Sub

注解

此方法绘制一个通过数组中每个点的基数样条。

点数组必须至少包含三个 PointF 结构才能绘制曲线。

offset 参数的值指定要在数组中跳过的元素数。 跳过的元素后的第一个元素表示曲线的起点。

numberOfSegments 参数的值指定要在曲线中绘制的起点之后的段数。 numberOfSegments 参数的值必须至少为 1。 offset 参数的值加上 numberOfSegments 参数的值必须小于 points 参数数组中的元素数。

tension 参数确定样条的形状。 如果 tension 参数的值为 0.0F，此方法将绘制直线段以连接点。 通常，tension 参数小于或等于 1.0F。 超过 1.0F 的值会产生异常结果。

DrawCurve(Pen, Point[], Int32, Int32, Single)

Source:

Graphics.cs

使用指定的紧张通过指定的 Point 结构数组绘制基数样线。

public:
 void DrawCurve(System::Drawing::Pen ^ pen, cli::array <System::Drawing::Point> ^ points, int offset, int numberOfSegments, float tension);

public void DrawCurve (System.Drawing.Pen pen, System.Drawing.Point[] points, int offset, int numberOfSegments, float tension);

member this.DrawCurve : System.Drawing.Pen * System.Drawing.Point[] * int * int * single -> unit

Public Sub DrawCurve (pen As Pen, points As Point(), offset As Integer, numberOfSegments As Integer, tension As Single)

参数

pen

Pen

确定曲线的颜色、宽度和样式的 Pen。

points

Point[]

定义样条的 Point 结构的数组。

offset

Int32

从 points 参数数组中的第一个元素偏移到曲线中的起点。

numberOfSegments

Int32

要包含在曲线中的起始点后的段数。

tension

Single

大于或等于 0.0F 的值，该值指定曲线的紧张度。

例外

ArgumentNullException

pen null。

-或-

points null。

示例

下面的代码示例设计用于 Windows 窗体，它需要 PaintEventArgse，这是 Paint 事件处理程序的参数。 该代码执行以下操作：

• 创建红色和绿色笔。

• 创建七个点来定义曲线。

• 在七点之间绘制六条红色直线，形成不完整的多边形。

• 定义起点偏移量和段数。

• 定义紧张。

• 绘制一条打开的绿色曲线（从第三点开始）到最后五个点。

该方法将紧张度设置为 1.0。

private:
   void DrawCurvePointSegmentTension( 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 offset, number of segments, and tension.
      int offset = 2;
      int numSegments = 4;
      float tension = 1.0F;

      // Draw curve to screen.
      e->Graphics->DrawCurve( greenPen, curvePoints, offset, numSegments, tension );
   }

private void DrawCurvePointSegmentTension(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 offset, number of segments, and tension.
    int offset = 2;
    int numSegments = 4;
    float tension = 1.0F;

    // Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, offset, numSegments, tension);
}

Private Sub DrawCurvePointSegmentTension(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 offset, number of segments, and tension.
    Dim offset As Integer = 2
    Dim numSegments As Integer = 4
    Dim tension As Single = 1.0F

    ' Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, offset, numSegments, _
    tension)
End Sub

注解

此方法绘制一个通过数组中每个点的基数样条。

点数组必须至少包含三个 Point 结构才能绘制曲线。

offset 参数的值指定要在数组中跳过的元素数。 跳过的元素后的第一个元素表示曲线的起点。

numberOfSegments 参数的值指定要在曲线中绘制的起点之后的段数。 numberOfSegments 参数的值必须至少为 1。 offset 参数的值加上 numberOfSegments 参数的值必须小于 points 参数数组中的元素数。

tension 参数确定样条的形状。 如果 tension 参数的值为 0.0F，此方法将绘制直线段以连接点。 通常，tension 参数小于或等于 1.0F。 超过 1.0F 的值会产生异常结果。

DrawCurve(Pen, PointF[], Int32, Int32)

Source:

Graphics.cs

通过指定的 PointF 结构数组绘制基数样线。 绘图从数组的开头开始偏移。

public:
 void DrawCurve(System::Drawing::Pen ^ pen, cli::array <System::Drawing::PointF> ^ points, int offset, int numberOfSegments);

public void DrawCurve (System.Drawing.Pen pen, System.Drawing.PointF[] points, int offset, int numberOfSegments);

member this.DrawCurve : System.Drawing.Pen * System.Drawing.PointF[] * int * int -> unit

Public Sub DrawCurve (pen As Pen, points As PointF(), offset As Integer, numberOfSegments As Integer)

参数

pen

Pen

确定曲线的颜色、宽度和样式的 Pen。

points

PointF[]

定义样条的 PointF 结构的数组。

offset

Int32

从 points 参数数组中的第一个元素偏移到曲线中的起点。

numberOfSegments

Int32

要包含在曲线中的起始点后的段数。

例外

ArgumentNullException

pen null。

-或-

points null。

示例

下面的代码示例设计用于 Windows 窗体，它需要 PaintEventArgse，这是 Paint 事件处理程序的参数。 该代码执行以下操作：

• 创建红色和绿色笔。

• 创建七个点来定义曲线。

• 在七点之间绘制六条红色直线，形成不完整的多边形。

• 定义起点偏移量和段数。

• 绘制一条打开的绿色曲线（从第三点开始）到最后五个点。

该方法使用默认的 0.5 紧张。

private:
   void DrawCurvePointFSegments( 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 offset and number of segments.
      int offset = 2;
      int numSegments = 4;

      // Draw curve to screen.
      e->Graphics->DrawCurve( greenPen, curvePoints, offset, numSegments );
   }

private void DrawCurvePointFSegments(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 offset and number of segments.
    int offset = 2;
    int numSegments = 4;

    // Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, offset, numSegments);
}

Private Sub DrawCurvePointFSegments(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 offset and number of segments.
    Dim offset As Integer = 2
    Dim numSegments As Integer = 4

    ' Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, offset, numSegments)
End Sub

注解

此方法绘制一个通过数组中每个点的基数样条。

点数组必须至少包含三个 PointF 结构才能绘制曲线。

offset 参数的值指定要在数组中跳过的元素数。 跳过的元素后的第一个元素表示曲线的起点。

numberOfSegments 参数的值指定要在曲线中绘制的起点之后的段数。 numberOfSegments 参数的值必须至少为 1。 offset 参数的值加上 numberOfSegments 参数的值必须小于 points 参数数组中的元素数。

此方法使用默认的 0.5 紧张。

DrawCurve(Pen, PointF[], Single)

Source:

Graphics.cs

使用指定的紧张通过指定的 PointF 结构数组绘制基数样线。

public:
 void DrawCurve(System::Drawing::Pen ^ pen, cli::array <System::Drawing::PointF> ^ points, float tension);

public void DrawCurve (System.Drawing.Pen pen, System.Drawing.PointF[] points, float tension);

member this.DrawCurve : System.Drawing.Pen * System.Drawing.PointF[] * single -> unit

Public Sub DrawCurve (pen As Pen, points As PointF(), tension As Single)

参数

pen

Pen

确定曲线的颜色、宽度和样式的 Pen。

points

PointF[]

表示定义曲线的点的 PointF 结构的数组。

tension

Single

大于或等于 0.0F 的值，该值指定曲线的紧张度。

例外

ArgumentNullException

pen null。

-或-

points null。

示例

下面的代码示例设计用于 Windows 窗体，它需要 PaintEventArgse，这是 Paint 事件处理程序的参数。 该代码执行以下操作：

• 创建红色和绿色笔。

• 创建七个点来定义曲线。

• 在七点之间绘制六条红色直线，形成不完整的多边形。

• 创建紧张设置。

• 通过七点绘制一条开放的绿色封闭曲线。

该方法使用 1.0 的紧张关系。

private:
   void DrawCurvePointFTension( 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.
      float tension = 1.0F;

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

private void DrawCurvePointFTension(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.
    float tension = 1.0F;

    // Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, tension);
}

Private Sub DrawCurvePointFTension(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.
    Dim tension As Single = 1.0F

    ' Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, tension)
End Sub

注解

此方法绘制一个通过数组中每个点的基数样条。

点数组必须至少包含三个 PointF 结构才能绘制曲线。

tension 参数确定样条的形状。 如果 tension 参数的值为 0.0F，此方法将绘制直线段以连接点。 通常，tension 参数小于或等于 1.0F。 超过 1.0F 的值会产生异常结果。

DrawCurve(Pen, Point[], Single)

Source:

Graphics.cs

使用指定的紧张通过指定的 Point 结构数组绘制基数样线。

public:
 void DrawCurve(System::Drawing::Pen ^ pen, cli::array <System::Drawing::Point> ^ points, float tension);

public void DrawCurve (System.Drawing.Pen pen, System.Drawing.Point[] points, float tension);

member this.DrawCurve : System.Drawing.Pen * System.Drawing.Point[] * single -> unit

Public Sub DrawCurve (pen As Pen, points As Point(), tension As Single)

参数

pen

Pen

确定曲线的颜色、宽度和样式的 Pen。

points

Point[]

定义样条的 Point 结构的数组。

tension

Single

大于或等于 0.0F 的值，该值指定曲线的紧张度。

例外

ArgumentNullException

pen null。

-或-

points null。

示例

下面的代码示例设计用于 Windows 窗体，它需要 PaintEventArgse，这是 Paint 事件处理程序的参数。 该代码执行以下操作：

• 创建红色和绿色笔。

• 创建七个点来定义曲线。

• 在七点之间绘制六条红色直线，形成不完整的多边形。

• 创建紧张设置。

• 通过七点绘制一条开放的绿色封闭曲线。

该方法使用 1.0 的紧张关系。

private:
   void DrawCurvePointTension( 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.
      float tension = 1.0F;

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

private void DrawCurvePointTension(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.
    float tension = 1.0F;

    // Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, tension);
}

Private Sub DrawCurvePointTension(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.
    Dim tension As Single = 1.0F

    ' Draw curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints, tension)
End Sub

注解

此方法绘制一个通过数组中每个点的基数样条。

点数组必须至少包含三个 Point 结构才能绘制曲线。

tension 参数确定样条的形状。 如果 tension 参数的值为 0.0F，此方法将绘制直线段以连接点。 通常，tension 参数小于或等于 1.0F。 超过 1.0F 的值会产生异常结果。

DrawCurve(Pen, PointF[])

Source:

Graphics.cs

通过指定的 PointF 结构数组绘制基数样线。

public:
 void DrawCurve(System::Drawing::Pen ^ pen, ... cli::array <System::Drawing::PointF> ^ points);

public void DrawCurve (System.Drawing.Pen pen, params System.Drawing.PointF[] points);

member this.DrawCurve : System.Drawing.Pen * System.Drawing.PointF[] -> unit

Public Sub DrawCurve (pen As Pen, ParamArray points As PointF())

参数

pen

Pen

确定曲线的颜色、宽度和样式的 Pen。

points

PointF[]

定义样条的 PointF 结构的数组。

例外

ArgumentNullException

pen null。

-或-

points null。

示例

下面的代码示例设计用于 Windows 窗体，它需要 PaintEventArgse，这是 Paint 事件处理程序的参数。 该代码执行以下操作：

• 创建红色和绿色笔。

• 创建七个点来定义曲线。

• 在七点之间绘制六条红色直线，形成不完整的多边形。

• 通过七点绘制一条开放的绿色曲线。

该方法使用默认的 0.5 紧张。

private:
   void DrawCurvePointF( 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 curve to screen.
      e->Graphics->DrawCurve( greenPen, curvePoints );
   }

private void DrawCurvePointF(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 curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints);
}

Private Sub DrawCurvePointF(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 curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints)
End Sub

注解

此方法绘制一个通过数组中每个点的基数样条。

点数组必须至少包含三个 PointF 结构才能绘制曲线。

此方法使用默认的 0.5 紧张。

DrawCurve(Pen, Point[])

Source:

Graphics.cs

通过指定的 Point 结构数组绘制基数样线。

public:
 void DrawCurve(System::Drawing::Pen ^ pen, ... cli::array <System::Drawing::Point> ^ points);

public void DrawCurve (System.Drawing.Pen pen, params System.Drawing.Point[] points);

member this.DrawCurve : System.Drawing.Pen * System.Drawing.Point[] -> unit

Public Sub DrawCurve (pen As Pen, ParamArray points As Point())

参数

pen

Pen

确定曲线的颜色、宽度和高度的 Pen。

points

Point[]

定义样条的 Point 结构的数组。

例外

ArgumentNullException

pen null。

-或-

points null。

示例

下面的代码示例设计用于 Windows 窗体，它需要 PaintEventArgse，这是 Paint 事件处理程序的参数。 该代码执行以下操作：

• 创建红色和绿色笔。

• 创建七个点来定义曲线。

• 在七点之间绘制六条红色直线，形成不完整的多边形。

• 通过七点绘制一条开放的绿色曲线。

该方法使用默认的 0.5 紧张。

private:
   void DrawCurvePoint( 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 curve to screen.
      e->Graphics->DrawCurve( greenPen, curvePoints );
   }

private void DrawCurvePoint(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 curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints);
}

Private Sub DrawCurvePoint(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 curve to screen.
    e.Graphics.DrawCurve(greenPen, curvePoints)
End Sub

注解

此方法绘制一个通过数组中每个点的基数样条。

点数组必须至少包含三个 Point 结构才能绘制曲线。

此方法使用默认的 0.5 紧张。