# Point3D.Subtract 方法

## 重载

 从一个 Point3D 结构中减去另一个 Point3D 结构并以 Vector3D 结构返回结果。Subtracts a Point3D structure from a Point3D structure and returns the result as a Vector3D structure. 从一个 Vector3D 结构中减去另一个 Point3D 结构并以 Point3D 结构返回结果。Subtracts a Vector3D structure from a Point3D structure and returns the result as a Point3D structure.

## Subtract(Point3D, Point3D)

``````public:
static System::Windows::Media::Media3D::Vector3D Subtract(System::Windows::Media::Media3D::Point3D point1, System::Windows::Media::Media3D::Point3D point2);``````
``public static System.Windows.Media.Media3D.Vector3D Subtract (System.Windows.Media.Media3D.Point3D point1, System.Windows.Media.Media3D.Point3D point2);``
``static member Subtract : System.Windows.Media.Media3D.Point3D * System.Windows.Media.Media3D.Point3D -> System.Windows.Media.Media3D.Vector3D``
``Public Shared Function Subtract (point1 As Point3D, point2 As Point3D) As Vector3D``

point1
Point3D

point2
Point3D

#### 返回

Vector3D 结构，它表示 `point1``point2` 之间的差值。A Vector3D structure that represents the difference between `point1` and `point2`.

### 示例

``````// Subtracts a Point3D from a Point3D using the static Subtract method.
// Returns a Vector3D.

Point3D point1 = new Point3D(10, 5, 1);
Point3D point2 = new Point3D(15, 40, 60);
Vector3D vectorResult = new Vector3D();

vectorResult = Point3D.Subtract(point1, point2);
// vectorResult is equal to (-5, -35, -59)

// Displaying Results
syntaxString = "vectorResult = Point3D.Subtract(point1, point2);";
resultType = "Vector3D";
operationString = "Subtracting a Point3D from a Point3D";
ShowResults(vectorResult.ToString(), syntaxString, resultType, operationString);
``````
``````' Subtracts a Point3D from a Point3D using the static Subtract method.
' Returns a Vector3D.

Dim point1 As New Point3D(10, 5, 1)
Dim point2 As New Point3D(15, 40, 60)
Dim vectorResult As New Vector3D()

vectorResult = Point3D.Subtract(point1, point2)
' vectorResult is equal to (-5, -35, -59)

' Displaying Results
syntaxString = "vectorResult = Point3D.Subtract(point1, point2)"
resultType = "Vector3D"
operationString = "Subtracting a Point3D from a Point3D"
ShowResults(vectorResult.ToString(), syntaxString, resultType, operationString)
``````

## Subtract(Point3D, Vector3D)

``````public:
static System::Windows::Media::Media3D::Point3D Subtract(System::Windows::Media::Media3D::Point3D point, System::Windows::Media::Media3D::Vector3D vector);``````
``public static System.Windows.Media.Media3D.Point3D Subtract (System.Windows.Media.Media3D.Point3D point, System.Windows.Media.Media3D.Vector3D vector);``
``static member Subtract : System.Windows.Media.Media3D.Point3D * System.Windows.Media.Media3D.Vector3D -> System.Windows.Media.Media3D.Point3D``
``Public Shared Function Subtract (point As Point3D, vector As Vector3D) As Point3D``

point
Point3D

vector
Vector3D

#### 返回

`point``vector` 之间的差值。The difference between `point` and `vector`.

### 示例

``````// Subtracts a Vector3D from a Point3D using the static Subtract method.
// Returns a Point3D.

Point3D point1 = new Point3D(10, 5, 1);
Vector3D vector1 = new Vector3D(20, 30, 40);
Point3D pointResult = new Point3D();

pointResult = Point3D.Subtract(point1, vector1);
// pointResult is equal to (-10, -25, -39)

// Displaying Results
syntaxString = "pointResult = Point3D.Subtract(point1, vector1);";
resultType = "Point3D";
operationString = "Subtracting a Vector3D from a Point3D";
ShowResults(pointResult.ToString(), syntaxString, resultType, operationString);
``````
``````' Subtracts a Vector3D from a Point3D using the static Subtract method.
' Returns a Point3D.

Dim point1 As New Point3D(10, 5, 1)
Dim vector1 As New Vector3D(20, 30, 40)
Dim pointResult As New Point3D()

pointResult = Point3D.Subtract(point1, vector1)
' pointResult is equal to (-10, -25, -39)

' Displaying Results
syntaxString = "pointResult = Point3D.Subtract(point1, vector1)"
resultType = "Point3D"
operationString = "Subtracting a Vector3D from a Point3D"
ShowResults(pointResult.ToString(), syntaxString, resultType, operationString)
``````