GraphicsPath.Flatten 方法

定义

命名空间:

System.Drawing.Drawing2D

程序集:

System.Drawing.Common.dll

包:

System.Drawing.Common v8.0.0

将此路径中的各段曲线转换成相连的线段序列。

重载

Flatten()	将此路径中的各段曲线转换成相连的线段序列。
Flatten(Matrix)	应用指定的变换，然后将此 GraphicsPath 中的各段曲线转换成相连的线段的序列。
Flatten(Matrix, Single)	将此 GraphicsPath 中的各段曲线转换成相连的线段序列。

Flatten()

Source:

GraphicsPath.cs

将此路径中的各段曲线转换成相连的线段序列。

public:
 void Flatten();

public void Flatten ();

member this.Flatten : unit -> unit

Public Sub Flatten ()

示例

有关示例，请参见 Flatten(Matrix, Single)。

Flatten(Matrix)

Source:

GraphicsPath.cs

应用指定的变换，然后将此 GraphicsPath 中的各段曲线转换成相连的线段的序列。

public:
 void Flatten(System::Drawing::Drawing2D::Matrix ^ matrix);

public void Flatten (System.Drawing.Drawing2D.Matrix? matrix);

member this.Flatten : System.Drawing.Drawing2D.Matrix -> unit

Public Sub Flatten (matrix As Matrix)

参数

matrix

Matrix

用来在展平前对此 Matrix 进行变换的 GraphicsPath。

示例

有关示例，请参见 Flatten(Matrix, Single)。

Flatten(Matrix, Single)

Source:

GraphicsPath.cs

将此 GraphicsPath 中的各段曲线转换成相连的线段序列。

public:
 void Flatten(System::Drawing::Drawing2D::Matrix ^ matrix, float flatness);

public void Flatten (System.Drawing.Drawing2D.Matrix? matrix, float flatness);

member this.Flatten : System.Drawing.Drawing2D.Matrix * single -> unit

Public Sub Flatten (matrix As Matrix, flatness As Single)

参数

matrix

Matrix

用来在展平前对此 Matrix 进行变换的 GraphicsPath。

flatness

Single

指定曲线和其展平的近似直线之间的最大允许误差。 值 0.25 是默认值。 降低该展平值将增加近似直线中线段的数目。

示例

下面的代码示例旨在与 Windows 窗体 一起使用，它需要 PaintEventArgse事件OnPaint对象。 此代码执行以下操作：

• 创建图形路径和转换矩阵。

• 使用四个点向路径添加曲线。

• 使用黑色笔将 (曲线) 绘制到屏幕的路径。

• 将曲线向下移动 10 像素并将其平展。

• 使用红色笔将曲线绘制到屏幕。

请注意，红色曲线将连接这些点的线条平展。

private:
   void FlattenExample( PaintEventArgs^ e )
   {
      GraphicsPath^ myPath = gcnew GraphicsPath;
      Matrix^ translateMatrix = gcnew Matrix;
      translateMatrix->Translate( 0, 10 );
      Point point1 = Point(20,100);
      Point point2 = Point(70,10);
      Point point3 = Point(130,200);
      Point point4 = Point(180,100);
      array<Point>^ points = {point1,point2,point3,point4};
      myPath->AddCurve( points );
      e->Graphics->DrawPath( gcnew Pen( Color::Black,2.0f ), myPath );
      myPath->Flatten( translateMatrix, 10.0f );
      e->Graphics->DrawPath( gcnew Pen( Color::Red,1.0f ), myPath );
   }

private void FlattenExample(PaintEventArgs e)
{
    GraphicsPath myPath = new GraphicsPath();
    Matrix translateMatrix = new Matrix();
    translateMatrix.Translate(0, 10);
    Point point1 = new Point(20, 100);
    Point point2 = new Point(70, 10);
    Point point3 = new Point(130, 200);
    Point point4 = new Point(180, 100);
    Point[] points = {point1, point2, point3, point4};
    myPath.AddCurve(points);
    e.Graphics.DrawPath(new Pen(Color.Black, 2), myPath);
    myPath.Flatten(translateMatrix, 10f);
    e.Graphics.DrawPath(new Pen(Color.Red, 1), myPath);
}

Public Sub FlattenExample(ByVal e As PaintEventArgs)
    Dim myPath As New GraphicsPath
    Dim translateMatrix As New Matrix
    translateMatrix.Translate(0, 10)
    Dim point1 As New Point(20, 100)
    Dim point2 As New Point(70, 10)
    Dim point3 As New Point(130, 200)
    Dim point4 As New Point(180, 100)
    Dim points As Point() = {point1, point2, point3, point4}
    myPath.AddCurve(points)
    e.Graphics.DrawPath(New Pen(Color.Black, 2), myPath)
    myPath.Flatten(translateMatrix, 10.0F)
    e.Graphics.DrawPath(New Pen(Color.Red, 1), myPath)
End Sub
'FlattenExample