ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Geometry Namespace / Coordinate3D Structure / DotProduct Method
The input Coordinate3D to use in the dot product.
Example Version

DotProduct Method (Coordinate3D)
Calculates the dot product of this Coordinate3D and another Coordinate3D. Vector dot product is used.
Syntax
public double DotProduct( 
   Coordinate3D other
)

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

ArcGIS Pro version: 3 or higher.
See Also