Graphics.DrawCurve 方法

定义

命名空间:

System.Drawing

程序集:

System.Drawing.Common.dll

包:

System.Drawing.Common v8.0.0

绘制经过一组指定的 Point 结构的基数样条。

重载

DrawCurve(Pen, PointF[], Int32, Int32, Single)	使用指定的张力绘制经过一组指定的 PointF 结构的基数样条。 从相对于数组开始位置的偏移量开始绘制。
DrawCurve(Pen, Point[], Int32, Int32, Single)	使用指定的张力绘制经过一组指定的 Point 结构的基数样条。
DrawCurve(Pen, PointF[], Int32, Int32)	绘制经过一组指定的 PointF 结构的基数样条。 从相对于数组开始位置的偏移量开始绘制。
DrawCurve(Pen, PointF[], Single)	使用指定的张力绘制经过一组指定的 PointF 结构的基数样条。
DrawCurve(Pen, Point[], Single)	使用指定的张力绘制经过一组指定的 Point 结构的基数样条。
DrawCurve(Pen, PointF[])	绘制经过一组指定的 PointF 结构的基数样条。
DrawCurve(Pen, Point[])	绘制经过一组指定的 Point 结构的基数样条。

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

Source:

Graphics.cs

使用指定的张力绘制经过一组指定的 PointF 结构的基数样条。 从相对于数组开始位置的偏移量开始绘制。

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

Pen，它确定曲线的颜色、宽度和样式。

points

PointF[]

PointF 结构数组，这些结构定义样条。

offset

Int32

从 points 参数数组中的第一个元素到曲线中起始点的偏移量。

numberOfSegments

Int32

起始点之后要包含在曲线中的段数。

tension

Single

大于或等于 0.0F 的值，该值指定曲线的张力。

例外

ArgumentNullException

pen 为 null。

或

points 为 null。

示例

下面的代码示例旨在与 Windows 窗体 一起使用，它需要 PaintEventArgse，这是事件处理程序的参数Paint。 此代码执行以下操作：

• 创建红色和绿色笔。

• 创建七个点来定义曲线。

• 在七个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。

• 绘制一条开放的绿色曲线 (从第三点开始，) 到最后五个点。

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。

点数组必须包含至少三个 PointF 结构才能绘制曲线。

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

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

参数 tension 确定样条线的形状。 如果 参数的 tension 值为 0.0F，则此方法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

使用指定的张力绘制经过一组指定的 Point 结构的基数样条。

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

Pen，它确定曲线的颜色、宽度和样式。

points

Point[]

Point 结构数组，这些结构定义样条。

offset

Int32

从 points 参数数组中的第一个元素到曲线中起始点的偏移量。

numberOfSegments

Int32

起始点之后要包含在曲线中的段数。

tension

Single

大于或等于 0.0F 的值，该值指定曲线的张力。

例外

ArgumentNullException

pen 为 null。

或

points 为 null。

示例

下面的代码示例旨在与 Windows 窗体 一起使用，它需要 PaintEventArgse，这是事件处理程序的参数Paint。 此代码执行以下操作：

• 创建红色和绿色笔。

• 创建七个点来定义曲线。

• 在七个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。

• 绘制一条开放的绿色曲线 (从第三点开始，) 到最后五个点。

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 Point 个结构才能绘制曲线。

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

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

参数 tension 确定样条线的形状。 如果 参数的 tension 值为 0.0F，则此方法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

绘制经过一组指定的 PointF 结构的基数样条。 从相对于数组开始位置的偏移量开始绘制。

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

Pen，它确定曲线的颜色、宽度和样式。

points

PointF[]

PointF 结构数组，这些结构定义样条。

offset

Int32

从 points 参数数组中的第一个元素到曲线中起始点的偏移量。

numberOfSegments

Int32

起始点之后要包含在曲线中的段数。

例外

ArgumentNullException

pen 为 null。

或

points 为 null。

示例

下面的代码示例旨在与 Windows 窗体 一起使用，它需要 PaintEventArgse，这是事件处理程序的参数Paint。 此代码执行以下操作：

• 创建红色和绿色笔。

• 创建七个点来定义曲线。

• 在七个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。

• 绘制一条开放的绿色曲线 (从第三点开始，) 到最后五个点。

方法使用默认的紧张度为 0.5。

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 PointF 个结构才能绘制曲线。

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

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

此方法使用默认的紧张度为 0.5。

DrawCurve(Pen, PointF[], Single)

Source:

Graphics.cs

使用指定的张力绘制经过一组指定的 PointF 结构的基数样条。

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

Pen，它确定曲线的颜色、宽度和样式。

points

PointF[]

PointF 结构的数组，这些结构表示定义曲线的点。

tension

Single

大于或等于 0.0F 的值，该值指定曲线的张力。

例外

ArgumentNullException

pen 为 null。

或

points 为 null。

示例

下面的代码示例旨在与 Windows 窗体 一起使用，它需要 PaintEventArgse，这是事件处理程序的参数Paint。 此代码执行以下操作：

• 创建红色和绿色笔。

• 创建七个点来定义曲线。

• 在七个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。

• 通过七个点绘制一条绿色封闭曲线。

方法使用 1.0 的紧张度。

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 PointF 个结构才能绘制曲线。

参数 tension 确定样条线的形状。 如果 参数的 tension 值为 0.0F，则此方法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

使用指定的张力绘制经过一组指定的 Point 结构的基数样条。

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

Pen，它确定曲线的颜色、宽度和样式。

points

Point[]

Point 结构数组，这些结构定义样条。

tension

Single

大于或等于 0.0F 的值，该值指定曲线的张力。

例外

ArgumentNullException

pen 为 null。

或

points 为 null。

示例

下面的代码示例旨在与 Windows 窗体 一起使用，它需要 PaintEventArgse，这是事件处理程序的参数Paint。 此代码执行以下操作：

• 创建红色和绿色笔。

• 创建七个点来定义曲线。

• 在七个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。

• 通过七个点绘制一条绿色封闭曲线。

方法使用 1.0 的紧张度。

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 Point 个结构才能绘制曲线。

参数 tension 确定样条线的形状。 如果 参数的 tension 值为 0.0F，则此方法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

绘制经过一组指定的 PointF 结构的基数样条。

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

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

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

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

参数

pen

Pen

Pen，它确定曲线的颜色、宽度和样式。

points

PointF[]

PointF 结构数组，这些结构定义样条。

例外

ArgumentNullException

pen 为 null。

或

points 为 null。

示例

下面的代码示例旨在与 Windows 窗体 一起使用，它需要 PaintEventArgse，这是事件处理程序的参数Paint。 此代码执行以下操作：

• 创建红色和绿色笔。

• 创建七个点来定义曲线。

• 在七个点之间绘制六条红色直线，形成不完整的多边形。

• 通过七个点绘制一条开放的绿色曲线。

方法使用默认的紧张度为 0.5。

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 PointF 个结构才能绘制曲线。

此方法使用默认的紧张度为 0.5。

DrawCurve(Pen, Point[])

Source:

Graphics.cs

绘制经过一组指定的 Point 结构的基数样条。

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

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

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

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

参数

pen

Pen

Pen，它确定曲线的颜色、宽度和高度。

points

Point[]

Point 结构数组，这些结构定义样条。

例外

ArgumentNullException

pen 为 null。

或

points 为 null。

示例

下面的代码示例旨在与 Windows 窗体 一起使用，它需要 PaintEventArgse，这是事件处理程序的参数Paint。 此代码执行以下操作：

• 创建红色和绿色笔。

• 创建七个点来定义曲线。

• 在七个点之间绘制六条红色直线，形成不完整的多边形。

• 通过七个点绘制一条开放的绿色曲线。

方法使用默认的紧张度为 0.5。

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 Point 个结构才能绘制曲线。

此方法使用默认的紧张度为 0.5。