Version: 2020.3
LanguageEnglish
  • C#

Vector3.Dot

Suggest a change

Success!

Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.

Close

Submission failed

For some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.

Close

Cancel

Declaration

public static float Dot(Vector3 lhs, Vector3 rhs);

Description

Dot Product of two vectors.

The dot product is a float value equal to the magnitudes of the two vectors multiplied together and then multiplied by the cosine of the angle between them.

For normalized vectors Dot returns 1 if they point in exactly the same direction, -1 if they point in completely opposite directions and zero if the vectors are perpendicular.

// detects if other transform is behind this object

using UnityEngine; using System.Collections;

public class ExampleClass : MonoBehaviour { public Transform other;

void Update() { if (other) { Vector3 forward = transform.TransformDirection(Vector3.forward); Vector3 toOther = other.position - transform.position;

if (Vector3.Dot(forward, toOther) < 0) { print("The other transform is behind me!"); } } } }