PolyBezierSegment Sınıf

Tanım

public ref class PolyBezierSegment sealed : System::Windows::Media::PathSegment

public sealed class PolyBezierSegment : System.Windows.Media.PathSegment

type PolyBezierSegment = class
    inherit PathSegment

Public NotInheritable Class PolyBezierSegment
Inherits PathSegment

Devralma

Object

DispatcherObject

DependencyObject

Freezable

Animatable

PathSegment

PolyBezierSegment

Örnekler

Aşağıdaki örnekte, iki kübik Bezier eğrisi çizmek için a'nın PolyBezierSegment nasıl kullanılacağı gösterilmektedir.

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
  <StackPanel>
    <Canvas>
      <Path Stroke="Black" StrokeThickness="1">
        <Path.Data>
          <PathGeometry>
            <PathGeometry.Figures>
              <PathFigureCollection>

                <!-- The StartPoint specifies the starting point of the first curve. -->
                <PathFigure StartPoint="10,100">
                  <PathFigure.Segments>
                    <PathSegmentCollection>

                      <!-- The PolyBezierSegment specifies two cubic Bezier curves.
                           The first curve is from 10,100 (start point specified above)
                           to 300,100 with a control point of 0,0 and another control
                           point of 200,0. The second curve is from 300,100 
                           (end of the last curve) to 600,100 with a control point of 300,0
                           and another control point of 400,0. -->
                      <PolyBezierSegment Points="0,0 200,0 300,100 300,0 400,0 600,100" />
                    </PathSegmentCollection>
                  </PathFigure.Segments>
                </PathFigure>
              </PathFigureCollection>
            </PathGeometry.Figures>
          </PathGeometry>
        </Path.Data>
      </Path>
    </Canvas>
  </StackPanel>
</Page>

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;

namespace SDKSample
{
    public partial class PolyBezierSegmentExample : Page
    {
        public PolyBezierSegmentExample()
        {

            // Create a PathFigure to be used for the PathGeometry of myPath.
            PathFigure myPathFigure = new PathFigure();

            // Set the starting point for the PathFigure specifying that the
            // geometry starts at point 10,100.
            myPathFigure.StartPoint = new Point(10, 100);

            // Create a PointCollection that holds the Points used to specify 
            // the points of the PolyBezierSegment below.
            PointCollection myPointCollection = new PointCollection(6);
            myPointCollection.Add(new Point(0, 0));
            myPointCollection.Add(new Point(200, 0));
            myPointCollection.Add(new Point(300, 100));
            myPointCollection.Add(new Point(300, 0));
            myPointCollection.Add(new Point(400, 0));
            myPointCollection.Add(new Point(600, 100));

            // The PolyBezierSegment specifies two cubic Bezier curves.
            // The first curve is from 10,100 (start point specified by the PathFigure)
            // to 300,100 with a control point of 0,0 and another control point 
            // of 200,0. The second curve is from 300,100 (end of the last curve) to 
            // 600,100 with a control point of 300,0 and another control point of 400,0.
            PolyBezierSegment myBezierSegment = new PolyBezierSegment();
            myBezierSegment.Points = myPointCollection;

            PathSegmentCollection myPathSegmentCollection = new PathSegmentCollection();
            myPathSegmentCollection.Add(myBezierSegment);

            myPathFigure.Segments = myPathSegmentCollection;

            PathFigureCollection myPathFigureCollection = new PathFigureCollection();
            myPathFigureCollection.Add(myPathFigure);

            PathGeometry myPathGeometry = new PathGeometry();
            myPathGeometry.Figures = myPathFigureCollection;

            // Create a path to draw a geometry with.
            Path myPath = new Path();
            myPath.Stroke = Brushes.Black;
            myPath.StrokeThickness = 1;

            // specify the shape (quadratic Bezier curve) of the path using the StreamGeometry.
            myPath.Data = myPathGeometry;

            // Add path shape to the UI.
            StackPanel mainPanel = new StackPanel();
            mainPanel.Children.Add(myPath);
            this.Content = mainPanel;
        }
    }
}

Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Media
Imports System.Windows.Shapes

Namespace SDKSample
    Partial Public Class PolyBezierSegmentExample
        Inherits Page
        Public Sub New()

            ' Create a PathFigure to be used for the PathGeometry of myPath.
            Dim myPathFigure As New PathFigure()

            ' Set the starting point for the PathFigure specifying that the
            ' geometry starts at point 10,100.
            myPathFigure.StartPoint = New Point(10, 100)

            ' Create a PointCollection that holds the Points used to specify 
            ' the points of the PolyBezierSegment below.
            Dim myPointCollection As New PointCollection(6)
            myPointCollection.Add(New Point(0, 0))
            myPointCollection.Add(New Point(200, 0))
            myPointCollection.Add(New Point(300, 100))
            myPointCollection.Add(New Point(300, 0))
            myPointCollection.Add(New Point(400, 0))
            myPointCollection.Add(New Point(600, 100))

            ' The PolyBezierSegment specifies two cubic Bezier curves.
            ' The first curve is from 10,100 (start point specified by the PathFigure)
            ' to 300,100 with a control point of 0,0 and another control point 
            ' of 200,0. The second curve is from 300,100 (end of the last curve) to 
            ' 600,100 with a control point of 300,0 and another control point of 400,0.
            Dim myBezierSegment As New PolyBezierSegment()
            myBezierSegment.Points = myPointCollection

            Dim myPathSegmentCollection As New PathSegmentCollection()
            myPathSegmentCollection.Add(myBezierSegment)

            myPathFigure.Segments = myPathSegmentCollection

            Dim myPathFigureCollection As New PathFigureCollection()
            myPathFigureCollection.Add(myPathFigure)

            Dim myPathGeometry As New PathGeometry()
            myPathGeometry.Figures = myPathFigureCollection

            ' Create a path to draw a geometry with.
            Dim myPath As New Path()
            myPath.Stroke = Brushes.Black
            myPath.StrokeThickness = 1

            ' specify the shape (quadratic Bezier curve) of the path using the StreamGeometry.
            myPath.Data = myPathGeometry

            ' Add path shape to the UI.
            Dim mainPanel As New StackPanel()
            mainPanel.Children.Add(myPath)
            Me.Content = mainPanel
        End Sub
    End Class
End Namespace

Açıklamalar

Nesneleri ve diğer kesimleri depolamak PolyBezierSegment için bir PathFigure nesne kullanın.

Kübik Bezier eğrisi dört noktayla tanımlanır: başlangıç noktası, bitiş noktası ve iki denetim noktası. A PolyBezierSegment , özelliğini bir nokta koleksiyonuna ayarlayarak Points bir veya daha fazla kübik Bezier eğrisi belirtir. Koleksiyondaki her üç nokta için birinci ve ikinci noktalar eğrinin iki denetim noktasını, üçüncü nokta ise bitiş noktasını belirtir. Başlangıç noktası son segmentin bitiş noktasıyla aynı olduğundan, eğri için hiçbir başlangıç noktası belirtilmediğinden unutmayın.

Kübik Bezier eğrisinin iki kontrol noktası mıknatıs gibi davranır, aksi takdirde kendilerine doğru düz bir çizgi olacak ve bir eğri üretir. İlk denetim noktası eğrinin başlangıç bölümünü etkiler; ikinci denetim noktası eğrinin bitiş bölümünü etkiler. Eğrinin her iki denetim noktasından da geçmesi gerekmeyebilir; her denetim noktası, çizginin kendi bölümünü kendisine doğru taşır, ancak kendi içinden taşımaz.

Oluşturucular

Alanlar

Özellikler

Yöntemler

Ekinlikler

Şunlara uygulanır

Ayrıca bkz.

• BezierSegment