CompanionCamera.cs

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class CompanionCamera : MonoBehaviour {
	// Debug shortcut keys:
	public KeyCode modifier;
	public KeyCode toggleButton;
	
	// If true, this will permanently disable the SteamVR companion camera.
	// If false, it'll leave the SteamVR companion camera in the rotation.
	public bool replaceSteamCamera;
	
	List<GameObject> cameras;
	SteamVR_GameView vrView;
	
	int currentIndex = 0;
	
	public bool isVRView {
		get { 
			if (replaceSteamCamera) {
				return currentIndex == 0 || currentIndex == 1;
			} else {
				return currentIndex == 0;
			}
		}
	}
	
	public Vector3 CurrentCameraPosition() {
		return cameras[currentIndex].transform.position;
	}
	
	public Quaternion CurrentCameraRotation() {
		// The camera might be on a child object and have a different rotation than it's parent object:
		return cameras[currentIndex].GetComponentInChildren<Camera>().transform.rotation;
	}
	
	void Awake() {
		cameras = new List<GameObject>();
		cameras.Add (null); // SteamVR camera placeholder
		vrView = GameObject.FindObjectOfType<SteamVR_GameView>();
		for (int i = 0; i < transform.childCount; i++) {
			cameras.Add((GameObject) transform.GetChild(i).gameObject);
		}
		if (replaceSteamCamera) {
			// Immediately disable SteamVR camera.
			SwitchCamera();
		}
	}
	
	public void SwitchCamera() {
		if (cameras == null || cameras.Count <= 0) {
			Debug.LogWarning ("No companion cameras registered");
			return;
		}
		
		if (currentIndex == 0) {
			vrView.enabled = false;
		} else {
			cameras[currentIndex].SetActive (false);
		}
		
		currentIndex ++;
		if (currentIndex >= cameras.Count) {
			if (replaceSteamCamera) {
				currentIndex = 1;
			} else {
			    currentIndex = 0;
			}
		}
		
		if (currentIndex == 0) {
			vrView.enabled = Globals.settings.viveBuild; // so we don't enable it if it isn't running
		} else {
			cameras[currentIndex].SetActive (true);
		}
	}
	
	void Update () {		
		if (modifier == KeyCode.None || Input.GetKey (modifier)) {
			if (Input.GetKeyDown (toggleButton)) {
				SwitchCamera ();
			}
		}
	}
}