Converts each curve in this
GraphicsPath into a sequence of connected line segments.
Namespace: System.Drawing.Drawing2D
Assembly: System.Drawing (in system.drawing.dll)
Visual Basic (Declaration)
Public Sub Flatten ( _
matrix As Matrix, _
flatness As Single _
)
Dim instance As GraphicsPath
Dim matrix As Matrix
Dim flatness As Single
instance.Flatten(matrix, flatness)
public void Flatten (
Matrix matrix,
float flatness
)
public:
void Flatten (
Matrix^ matrix,
float flatness
)
public void Flatten (
Matrix matrix,
float flatness
)
public function Flatten (
matrix : Matrix,
flatness : float
)
Parameters
- matrix
A Matrix by which to transform this GraphicsPath before flattening.
- flatness
Specifies the maximum permitted error between the curve and its flattened approximation. A value of 0.25 is the default. Reducing the flatness value will increase the number of line segments in the approximation.
The following code example is designed for use with Windows Forms, and it requires PaintEventArgse, an OnPaint event object. The code performs the following actions:
-
Creates a graphics path and a translation matrix.
-
Adds a curve to the path using four points.
-
Draws the path (curve) to the screen, using a black pen.
-
Shifts the curve down 10 pixels and flattens it.
-
Draws the curve to the screen using, a red pen.
Notice that the red curve has flattened lines connecting the points.
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
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);
}
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.get_Graphics().DrawPath(new Pen(Color.get_Black(), 2), myPath);
myPath.Flatten(translateMatrix, 10);
e.get_Graphics().DrawPath(new Pen(Color.get_Red(), 1), myPath);
} //FlattenExample
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.
.NET Framework
Supported in: 3.0, 2.0, 1.1, 1.0