Draw Camera Frustum

Questions & Answers
1

Is there an editor gizmo to keep the camera frustum drawn even when the camera is not selected?

2

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(Camera))]
public class CameraFrustumGizmo : MonoBehaviour {

	public virtual void OnDrawGizmos() {
		Matrix4x4 temp = Gizmos.matrix;
		Gizmos.matrix = Matrix4x4.TRS(transform.position, transform.rotation, Vector3.one);
		if (camera.orthographic) {
			float spread = camera.farClipPlane - camera.nearClipPlane;
			float center = (camera.farClipPlane + camera.nearClipPlane)*0.5f;
			Gizmos.DrawWireCube(new Vector3(0,0,center), new Vector3(camera.orthographicSize*2*camera.aspect, camera.orthographicSize*2, spread));
		} else {
			Gizmos.DrawFrustum(Vector3.zero, camera.fieldOfView, camera.farClipPlane, camera.nearClipPlane, camera.aspect);
		}
		Gizmos.matrix = temp;
	}
}
3

void OnDrawGizmos () {
// Gizmo Frustum
Gizmos.matrix = transform.localToWorldMatrix; // For the rotation bug
Gizmos.DrawFrustum(transform.position, Camera.main.fieldOfView, Camera.main.nearClipPlane, Camera.main.farClipPlane, Camera.main.aspect);
}