ArcGIS Pro 3.0 API Reference Guide
ArcGIS.Core.Geometry Namespace / Coordinate3D Structure / DotProduct Method
The input Coordinate3D to use in the dot product.
Example

In This Topic
    DotProduct Method (Coordinate3D)
    In This Topic
    Calculates the dot product of this Coordinate3D and another Coordinate3D. Vector dot product is used.
    Syntax
    public double DotProduct( 
       Coordinate3D other
    )
    Public Function DotProduct( _
       ByVal other As Coordinate3D _
    ) As Double

    Parameters

    other
    The input Coordinate3D to use in the dot product.

    Return Value

    A double representing the dot product of this Coordinate3D and the input Coordinate3D. The dot product is the sum of multiplying corresponding components of each Coordinate3D.
    Example
    Vector Operations
    // Easy 3D vectors
    Coordinate3D v = new Coordinate3D(0, 1, 0);
    // v.Magnitude = 1
    
    Coordinate3D other = new Coordinate3D(-1, 0, 0);
    // other.Magnitude = -1
    
    double dotProduct = v.DotProduct(other);      // dotProduct = 0
    
    Coordinate3D crossProduct = v.CrossProduct(other);
    // crossProduct.X = 0
    // crossProduct.Y = 0
    // crossProduct.Z = 1
    
    Coordinate3D addVector = v.AddCoordinate3D(other);
    // addVector.X = -1
    // addVector.Y = 1
    // addVector.Z = 0
    
    // Rotate around x-axis
    Coordinate3D w = v;
    w.Rotate(Math.PI, other);
    // w.X = 0
    // w.Y = -1
    // w.Z = 0
    
    w.Scale(0.5);
    // w.X = 0
    // w.Y = -0.5
    // w.Z = 0
    
    w.Scale(-4);
    // w.X = 0
    // ww.Y = 2
    // w.Z = 0
    // w.Magnitude = 2
    
    w.Move(3, 2, 0);
    // w.X = 3
    // w.Y = 4
    // w.Z = 0
    // w.Magnitude = 5
    
    
    Coordinate3D emptyVector = new Coordinate3D();
    // emptyVector = (0, 0, 0)
    emptyVector.SetEmpty();
    // emptyVector = (Nan, Nan, Nan)
    
    Coordinate3D c1 = new Coordinate3D(2, 3, 4);
    Coordinate3D c2 = new Coordinate3D(9, -1, 3);
    
    var result_add = c1 + c2;
    // result_add = (11, 2, 7)
    var result_sub = c1 - c2;
    // result_sub = (-7, 4, 1)
    
    var b = result_sub != result_add;
    // b = true
    
    result_add = emptyVector + c1;
    // result_add = (Nan, Nan, Nan)
    
    b = result_add == emptyVector;
    // b = true
    
    Requirements

    Target Platforms: Windows 11, Windows 10, Windows 8.1

    See Also