Point4D.Equality(Point4D, Point4D) 運算子

定義

比較兩個 Point4D 結構是否相等。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

參數

point1
Point4D

要比較的第一個 Point4D 結構。The first Point4D structure to compare.

point2
Point4D

要比較的第二個 Point4D 結構。The second Point4D structure to compare.

傳回

Boolean

如果 point4D1point4D2XYZ 座標相等則為 true,否則為 falsetrue if the X, Y, and Z coordinates of point4D1 and point4D2 are equal; otherwise, false.

範例

下列範例示範如何使用多載的等號比較運算子來檢查兩個 Point4D 結構是否相等。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)

備註

Point4D如果其 XY 、和屬性的值相同,則兩個結構相等 Z WTwo Point4D structures are equal if the values of their X, Y, Z, and W properties are the same.

因為在對 Double 其執行算數運算時,值可能會遺失精確度,所以在邏輯上相等的兩個值之間的比較 Point4D 可能會失敗。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.

適用於

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