Legacy Documentation: Version 2018.1 (Go to current version)
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Gizmos.DrawRay

public static void DrawRay(Ray r);
public static void DrawRay(Vector3 from, Vector3 direction);

Description

Draws a ray starting at from to from + direction.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { void OnDrawGizmosSelected() { // Draws a 5 unit long red line in front of the object Gizmos.color = Color.red; Vector3 direction = transform.TransformDirection(Vector3.forward) * 5; Gizmos.DrawRay(transform.position, direction); } }

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