Vector.Multiply 方法

定义

命名空间:

System.Windows

程序集:

WindowsBase.dll

将指定向量与指定的 Double、Matrix 或 Vector 相乘并将结果以 Vector 或 Double 形式返回。

重载

Multiply(Double, Vector)	将指定标量与指定向量相乘，并返回结果 Vector。
Multiply(Vector, Double)	将指定向量与指定标量相乘，并返回结果 Vector。
Multiply(Vector, Matrix)	使用指定的 Matrix 变换指定向量的坐标空间。
Multiply(Vector, Vector)	计算两个指定向量的点积并将结果以 Double 形式返回。

Multiply(Double, Vector)

将指定标量与指定向量相乘，并返回结果 Vector。

public:
 static System::Windows::Vector Multiply(double scalar, System::Windows::Vector vector);

public static System.Windows.Vector Multiply (double scalar, System.Windows.Vector vector);

static member Multiply : double * System.Windows.Vector -> System.Windows.Vector

Public Shared Function Multiply (scalar As Double, vector As Vector) As Vector

参数

scalar

Double

要乘以的标量。

vector

Vector

要相乘的向量。

返回

Vector

scalar 与 vector 相乘的结果。

示例

下面的示例演示如何使用此方法将标量乘以一个 Vector。

private Vector multiplyVectorByScalarExample2()
{
    Vector vector1 = new Vector(20, 30);
    Double scalar1 = 75;
    Vector vectorResult = new Vector();

    // Multiply the vector by the scalar.
    // vectorResult is equal to (1500,2250)
    vectorResult = Vector.Multiply(scalar1, vector1);

    return vectorResult;
}

另请参阅

• Multiply(Double, Vector)

Multiply(Vector, Double)

将指定向量与指定标量相乘，并返回结果 Vector。

public:
 static System::Windows::Vector Multiply(System::Windows::Vector vector, double scalar);

public static System.Windows.Vector Multiply (System.Windows.Vector vector, double scalar);

static member Multiply : System.Windows.Vector * double -> System.Windows.Vector

Public Shared Function Multiply (vector As Vector, scalar As Double) As Vector

参数

vector

Vector

要相乘的向量。

scalar

Double

要乘以的标量。

返回

Vector

vector 与 scalar 相乘的结果。

示例

以下示例演示如何使用此方法 Vector 乘以标量。

private Vector multiplyVectorByScalarExample1()
{
    Vector vector1 = new Vector(20, 30);
    Double scalar1 = 75;
    Vector vectorResult = new Vector();

    // Multiply the vector by the scalar.
    // vectorResult is equal to (1500,2250)
    vectorResult = Vector.Multiply(vector1, scalar1);

    return vectorResult;
}

另请参阅

• Multiply(Double, Vector)

Multiply(Vector, Matrix)

使用指定的 Matrix 变换指定向量的坐标空间。

public:
 static System::Windows::Vector Multiply(System::Windows::Vector vector, System::Windows::Media::Matrix matrix);

public static System.Windows.Vector Multiply (System.Windows.Vector vector, System.Windows.Media.Matrix matrix);

static member Multiply : System.Windows.Vector * System.Windows.Media.Matrix -> System.Windows.Vector

Public Shared Function Multiply (vector As Vector, matrix As Matrix) As Vector

参数

vector

Vector

要变换的向量结构。

matrix

Matrix

要应用于 vector 的变换。

返回

Vector

按 vector 变换 matrix 的结果。

示例

以下示例演示如何使用此方法乘以 a Vector Matrix。

private Vector multiplyVectorByMatrixExample()
{
    Vector vector1 = new Vector(20, 30);
    Matrix matrix1 = new Matrix(40, 50, 60, 70, 80, 90);
    Vector vectorResult = new Vector();

    // Multiply the vector and matrix.
    // vectorResult is equal to (2600,3100).
    vectorResult = Vector.Multiply(vector1, matrix1);

    return vectorResult;
}

另请参阅

• Multiply(Double, Vector)

Multiply(Vector, Vector)

计算两个指定向量的点积并将结果以 Double 形式返回。

public:
 static double Multiply(System::Windows::Vector vector1, System::Windows::Vector vector2);

public static double Multiply (System.Windows.Vector vector1, System.Windows.Vector vector2);

static member Multiply : System.Windows.Vector * System.Windows.Vector -> double

Public Shared Function Multiply (vector1 As Vector, vector2 As Vector) As Double

参数

vector1

Vector

要相乘的第一个向量。

vector2

Vector

要相乘的第二个向量结构。

返回

Double

一个 Double，其中包含 vector1 和 vector2 的标量点积，标量点积可通过下面的公式计算得出： (vector1.X * vector2.X) + (vector1.Y * vector2.Y)

示例

以下示例演示如何使用此方法乘以 a Vector Vector。

private Double getDotProductExample()
{
    Vector vector1 = new Vector(20, 30);
    Vector vector2 = new Vector(45, 70);
    Double doubleResult;

    // Return the dot product of the two specified vectors.
    // The dot product is calculated using the following 
    // formula: (vector1.X * vector2.X) + (vector1.Y * vector2.Y).
    // doubleResult is equal to 3000
    doubleResult = Vector.Multiply(vector1, vector2);

    return doubleResult;
}

另请参阅

• Multiply(Double, Vector)