StreamGeometryContext.PolyBezierTo Método
Definición
Importante
Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.
Dibuja una o varias curvas Bézier conectadas.
public:
abstract void PolyBezierTo(System::Collections::Generic::IList<System::Windows::Point> ^ points, bool isStroked, bool isSmoothJoin);
public abstract void PolyBezierTo (System.Collections.Generic.IList<System.Windows.Point> points, bool isStroked, bool isSmoothJoin);
abstract member PolyBezierTo : System.Collections.Generic.IList<System.Windows.Point> * bool * bool -> unit
Public MustOverride Sub PolyBezierTo (points As IList(Of Point), isStroked As Boolean, isSmoothJoin As Boolean)
Parámetros
Lista de puntos que especifican los puntos de control y de destino de una o varias curvas Bézier. El número de puntos en esta lista debe ser un múltiplo de tres.
- isStroked
- Boolean
Es true
para que se trace el segmento cuando se utilice Pen para representarlo; en caso contrario, es false
.
- isSmoothJoin
- Boolean
Es true
para tratar la unión entre este segmento y el anterior como un ángulo cuando se trace con Pen; en caso contrario, es false
.
Excepciones
Se ha intentado agregar un segmento sin iniciar una figura con una llamada al método BeginFigure(Point, Boolean, Boolean).
Ejemplos
En el ejemplo siguiente se muestra cómo dibujar varias curvas Bezier conectadas mediante el PolyBezierTo método .
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;
using System.Collections.Generic;
namespace SDKSample
{
public partial class StreamGeometryPolyBezierToExample : Page
{
public StreamGeometryPolyBezierToExample()
{
// Create a path to draw a geometry with.
Path myPath = new Path();
myPath.Stroke = Brushes.Black;
myPath.StrokeThickness = 1;
// Create a StreamGeometry to use to specify myPath.
StreamGeometry geometry = new StreamGeometry();
geometry.FillRule = FillRule.EvenOdd;
// Open a StreamGeometryContext that can be used to describe this StreamGeometry
// object's contents.
using (StreamGeometryContext ctx = geometry.Open())
{
// Set the begin point of the shape.
ctx.BeginFigure(new Point(10, 100), true /* is filled */, false /* is closed */);
// Create a collection of Point structures that will be used with the PolyBezierTo
// Method to create the Bezier curve.
List<Point> pointList = new List<Point>();
// First Bezier curve is specified with these three points.
// First control point for first Bezier curve.
pointList.Add(new Point(100,0));
// Second control point for first Bezier curve.
pointList.Add(new Point(200, 200));
// Destination point for first Bezier curve.
pointList.Add(new Point(300, 100));
// Second Bezier curve is specified with these three points.
// First control point for second Bezier curve.
pointList.Add(new Point(400, 0));
// Second control point for second Bezier curve.
pointList.Add(new Point(500, 200));
// Destination point for second Bezier curve.
pointList.Add(new Point(600, 100));
// Create a Bezier curve using the collection of Point Structures.
ctx.PolyBezierTo(pointList, true /* is stroked */, false /* is smooth join */);
}
// Freeze the geometry (make it unmodifiable)
// for additional performance benefits.
geometry.Freeze();
// specify the shape (Bezier curve) of the path using the StreamGeometry.
myPath.Data = geometry;
// 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
Imports System.Collections.Generic
Namespace SDKSample
Partial Public Class StreamGeometryPolyBezierToExample
Inherits Page
Public Sub New()
' Create a path to draw a geometry with.
Dim myPath As New Path()
myPath.Stroke = Brushes.Black
myPath.StrokeThickness = 1
' Create a StreamGeometry to use to specify myPath.
Dim geometry As New StreamGeometry()
geometry.FillRule = FillRule.EvenOdd
' Open a StreamGeometryContext that can be used to describe this StreamGeometry
' object's contents.
Using ctx As StreamGeometryContext = geometry.Open()
' Set the begin point of the shape.
ctx.BeginFigure(New Point(10, 100), True, False) ' is closed - is filled
' Create a collection of Point structures that will be used with the PolyBezierTo
' Method to create the Bezier curve.
Dim pointList As New List(Of Point)()
' First Bezier curve is specified with these three points.
' First control point for first Bezier curve.
pointList.Add(New Point(100,0))
' Second control point for first Bezier curve.
pointList.Add(New Point(200, 200))
' Destination point for first Bezier curve.
pointList.Add(New Point(300, 100))
' Second Bezier curve is specified with these three points.
' First control point for second Bezier curve.
pointList.Add(New Point(400, 0))
' Second control point for second Bezier curve.
pointList.Add(New Point(500, 200))
' Destination point for second Bezier curve.
pointList.Add(New Point(600, 100))
' Create a Bezier curve using the collection of Point Structures.
ctx.PolyBezierTo(pointList, True, False) ' is smooth join - is stroked
End Using
' Freeze the geometry (make it unmodifiable)
' for additional performance benefits.
geometry.Freeze()
' specify the shape (Bezier curve) of the path using the StreamGeometry.
myPath.Data = geometry
' Add path shape to the UI.
Dim mainPanel As New StackPanel()
mainPanel.Children.Add(myPath)
Me.Content = mainPanel
End Sub
End Class
End Namespace
Comentarios
El primer punto de points
especifica el primer punto de control, el siguiente especifica el segundo punto de control, el tercer punto especifica el punto final, el siguiente punto especifica el primer punto de control de la siguiente curva, etc.
Este método usa el punto final del segmento anterior como punto de partida. Si este es el primer segmento de una figura, usa el punto especificado por el BeginFigure método como punto de inicio.
No StreamGeometry se puede serializar si contiene o Transform cualquier segmento no rellenado o sin trazos.