# Vector3D.DotProduct(Vector3D, Vector3D) Method

## Definition

Calculates the dot product of two Vector3D structures.

``````public:
static double DotProduct(System::Windows::Media::Media3D::Vector3D vector1, System::Windows::Media::Media3D::Vector3D vector2);``````
``public static double DotProduct (System.Windows.Media.Media3D.Vector3D vector1, System.Windows.Media.Media3D.Vector3D vector2);``
``static member DotProduct : System.Windows.Media.Media3D.Vector3D * System.Windows.Media.Media3D.Vector3D -> double``
``Public Shared Function DotProduct (vector1 As Vector3D, vector2 As Vector3D) As Double``

#### Parameters

vector1
Vector3D

The first Vector3D structure to evaluate.

vector2
Vector3D

The second Vector3D structure to evaluate.

#### Returns

The dot product of `vector1` and `vector2`.

## Examples

The following example shows how to calculate the dot product of two Vector3D structures.

``````    // Calculates the Dot Product of two Vectors.

// Declaring vector1 and initializing x,y,z values
Vector3D vector1 = new Vector3D(20, 30, 40);

// Declaring vector2 without initializing x,y,z values
Vector3D vector2 = new Vector3D();

// A Double to hold the result of the operation
Double dotProduct;

// Assigning values to vector2
vector2.X = 45;
vector2.Y = 70;
vector2.Z = 80;

// Calculating the dot product of vector1 and vector2
dotProduct = Vector3D.DotProduct(vector1, vector2);

// vectorResult is equal to (6200)
``````
``````' Calculates the Dot Product of two Vectors.

' Declaring vector1 and initializing x,y,z values
Dim vector1 As New Vector3D(20, 30, 40)

' Declaring vector2 without initializing x,y,z values
Dim vector2 As New Vector3D()

' A Double to hold the result of the operation
Dim dotProduct As Double

' Assigning values to vector2
vector2.X = 45
vector2.Y = 70
vector2.Z = 80

' Calculating the dot product of vector1 and vector2
dotProduct = Vector3D.DotProduct(vector1, vector2)

' vectorResult is equal to (6200)
``````