Vector3.Reflect

Parameters

Description

Reflects a vector off the plane defined by a normal vector.

This method calculates the reflection vector using the following formula:

B = A − 2 × N × A ⋅ N

where A is the incoming vector and N defines the normal (perpendicular) vector of the reflection plane.

The returned value is a vector of equal magnitude to inDirection but with its direction reflected.


Reflection of a vector off a plane.

// This example moves a GameObject to the reflected position 
// of a second object
//
// To run this example, create two GameObjects at different 
// positions. In the Editor, assign these GameObjects as the 
// Original and Relflect Object variables. The reflected object
// moves to the reflected position of the original object. 

using UnityEngine;

public class ReflectExample : MonoBehaviour
{
    public Transform originalObject;
    public Transform reflectedObject;

    void Update()
    {
        // Makes the reflected object appear opposite of the original object,
        // mirrored in the y-z plane of the world
        reflectedObject.position = Vector3.Reflect(originalObject.position, Vector3.right);
    }
}