How to Draw a Raycast in Scene view

Questions & Answers
1

I have an object in my game that emits a RayCast2D given certain conditions.

What I want to be able to do is preview the RayCast2D in the editor Scene tab before starting the game, so I can do all my editing of the raycast visually by modifying the public properties of the object.

Is this possible in Unity?

2

Yes, but only during runtime. Use the following command:

var hit : RaycastHit;
var ray = transform.TransformDirection(Vector3.forward);
Physics.Raycast (transform.position, ray, hit, 100);
Debug.DrawLine (transform.position, hit.point,Color.red);
3

I have found the perfect answer on this website.

Turns out there’s an OnDrawGizmos() method that can be written in MonoBehaviors that does exactly what I want.