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Point4D Structure

Represents an x-, y-, z-, and w-coordinate point in world space used in performing transformations with non-affine 3-D matrices.

Namespace: System.Windows.Media.Media3D
Assembly: PresentationCore (in presentationcore.dll)
XML Namespace:  http://schemas.microsoft.com/winfx/2006/xaml/presentation

[SerializableAttribute] 
[TypeConverterAttribute(typeof(Point4DConverter))] 
public struct Point4D : IFormattable
/** @attribute SerializableAttribute() */ 
/** @attribute TypeConverterAttribute(System.Windows.Media.Media3D.Point4DConverter) */ 
public final class Point4D extends ValueType implements IFormattable
<object property="x,y,z,w"/>
 x   System.Double  The X component of this Point4D structure.  y   System.Double  The Y component of this Point4D structure.  z   System.Double  The Z component of this Point4D structure.  w   System.Double  The W component of this Point4D structure. 

This example shows how to test Point4D structures for equality and inequality.

The following code illustrates how to test Point4D structures for equality and inequality using the Point4D equality methods. The Point4D structures are tested for equality using the overloaded == operator, then for inequality using the overloaded != operator, and finally a Point3D structure and a Point4D structure are checked for equality using the static Equals method.

// instantiate Points
Point4D point4D1 = new Point4D();
Point4D point4D2 = new Point4D(15, 40, 60, 75);
Point3D point3D1 = new Point3D(15, 40, 60);

// result variables
Boolean areEqual;
Boolean areNotEqual;
String stringResult;

// defining x,y,z,w of point1
point4D1.X = 10;
point4D1.Y = 5;
point4D1.Z = 1;
point4D1.W = 4;

// checking if Points are equal
areEqual = point4D1 == point4D2;

// areEqual is False

// checking if Points are not equal
areNotEqual = point4D1 != point4D2;
// areNotEqual is True

if (Point4D.Equals(point4D1, point3D1))
{
    // the if condition is not true, so this block will not execute
    stringResult = "Both objects are Point4D structures and they are equal";
}

else
{
    // the if condition is false, so this branch will execute
    stringResult = "Parameters are not both Point4D strucutres, or they are but are not equal";
}

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, 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

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