Creating gizmos through code

We explored how to add simple gizmos through the Unity editor. This section will cover how to properly implement the OnDrawGizmos and OnDrawGizmosSelected methods to achieve a similar but more flexible solution.

Note

All the scripts in this section are examples, and are not meant to be used in the Level Creator tool.

The OnDrawGizmos and OnDrawGizmosSelected methods

To get started, in a new project, create a script called GizmoExample.cs. We will use this as a guinea pig for our first gizmos experiments (don't worry, the script is not going to suffer too much!)

Write the following code in GizmoExample.cs:

using UnityEngine;
public class GizmoExample : MonoBehaviour {
        private void OnDrawGizmos() { 
        }
}

When you implement the OnDrawGizmos method, you can add gizmos that always drawn in the Scene View and also allows the possibility to be selected with a click.

In this case, the method is empty. However, if you come back to Unity and wait for the compiler...