Debug.DrawRay

static function DrawRay (start : Vector3, dir : Vector3, color : Color = Color.white, duration : float = 0.0f, depthTest : boolean = true) : void

Description

Draws a line from start to start + dir with color for a duration of time and with or without depth testing. If duration is 0 then the line is rendered 1 frame.

The line will be drawn in the scene view of the editor. If gizmo drawing is enabled in the game view, the line will also be drawn there.

JavaScript
// Frame update example: Draws a 10 meter long green line from the position for 1 frame.
function Update () {
var forward : Vector3 = transform.TransformDirection(Vector3.forward) * 10;
Debug.DrawRay (transform.position, forward, Color.green);
}

JavaScript

// Event callback example: Debug-draw all contact points and normals for 2 seconds.
function OnCollisionEnter(collision : Collision) {
for (var contact : ContactPoint in collision.contacts) {
Debug.DrawRay(contact.point, contact.normal, Color.green, 2, false);
}
}