# Point4D.Equality(Point4D, Point4D) Operator

## Definition

Vergleicht zwei Point4D-Strukturen auf Gleichheit.Compares two Point4D structures for equality.

``````public:
static bool operator ==(System::Windows::Media::Media3D::Point4D point1, System::Windows::Media::Media3D::Point4D point2);``````
``public static bool operator == (System.Windows.Media.Media3D.Point4D point1, System.Windows.Media.Media3D.Point4D point2);``
``static member ( = ) : System.Windows.Media.Media3D.Point4D * System.Windows.Media.Media3D.Point4D -> bool``
``Public Shared Operator == (point1 As Point4D, point2 As Point4D) As Boolean``

#### Parameter

point1
Point4D

Die erste zu vergleichende Point4D-Struktur.The first Point4D structure to compare.

point2
Point4D

Die zweite zu vergleichende Point4D-Struktur.The second Point4D structure to compare.

#### Gibt zurück

`true`, wenn die X-Koordinate, die Y-Koordinate und die Z-Koordinate von `point4D1` und `point4D2` gleich sind, andernfalls `false`.`true` if the X, Y, and Z coordinates of `point4D1` and `point4D2` are equal; otherwise, `false`.

## Beispiele

Das folgende Beispiel zeigt, wie der überladene Gleichheits Operator verwendet wird Point4D , um zu prüfen, ob zwei-Strukturen gleich sind.The following example shows how to use the overloaded equality operator to check whether two Point4D structures are equal.

``````// Checks if two Point4D structures are equal using the overloaded equality operator.

Point4D point1 = new Point4D(10, 5, 1, 4);
Point4D point2 = new Point4D(15, 40, 60, 75);
Boolean areEqual;

areEqual = (point1 == point2);
// areEqual is False

// Displaying Results
syntaxString = "areEqual = (point1 == point2);";
resultType = "Boolean";
operationString = "Checking if two 3D points are equal";
ShowResults(areEqual.ToString(), syntaxString, resultType, operationString);
``````
``````' Checks if two Point4D structures are equal using the overloaded equality operator.

Dim point1 As New Point4D(10, 5, 1, 4)
Dim point2 As New Point4D(15, 40, 60, 75)
Dim areEqual As Boolean

areEqual = (point1 = point2)
' areEqual is False

' Displaying Results
syntaxString = "areEqual = (point1 == point2)"
resultType = "Boolean"
operationString = "Checking if two 3D points are equal"
ShowResults(areEqual.ToString(), syntaxString, resultType, operationString)
``````

## Hinweise

Zwei Point4D -Strukturen sind gleich, wenn die Werte XIhrer YEigenschaften Z,, W und identisch sind.Two Point4D structures are equal if the values of their X, Y, Z, and W properties are the same.

Da bei Double der Ausführung arithmetischer Operationen bei einem Wert die Genauigkeit verloren gehen kann, kann es Point4D vorkommen, dass ein Vergleich zwischen zwei Werten, die logisch gleich sind, fehlschlägt.Because a Double value can lose precision when arithmetic operations are performed on them, a comparison between two Point4D values that are logically equal might fail.