FallbackCameraController.cs

//======= Copyright (c) Valve Corporation, All rights reserved. ===============
//
// Purpose: Controls for the non-VR debug camera
//
//=============================================================================

using UnityEngine;
using System.Collections;

namespace Valve.VR.InteractionSystem
{
    //-------------------------------------------------------------------------
    [RequireComponent( typeof( Camera ) )]
    public class FallbackCameraController : MonoBehaviour
    {
        public float speed = 4.0f;
        public float shiftSpeed = 16.0f;
        public bool showInstructions = true;

        private Vector3 startEulerAngles;
        private Vector3 startMousePosition;
        private float realTime;

        //-------------------------------------------------
        void OnEnable()
        {
            realTime = Time.realtimeSinceStartup;
        }


        //-------------------------------------------------
        void Update()
        {
            float forward = 0.0f;
            if ( Input.GetKey( KeyCode.W ) || Input.GetKey( KeyCode.UpArrow ) )
            {
                forward += 1.0f;
            }
            if ( Input.GetKey( KeyCode.S ) || Input.GetKey( KeyCode.DownArrow ) )
            {
                forward -= 1.0f;
            }

            float right = 0.0f;
            if ( Input.GetKey( KeyCode.D ) || Input.GetKey( KeyCode.RightArrow ) )
            {
                right += 1.0f;
            }
            if ( Input.GetKey( KeyCode.A ) || Input.GetKey( KeyCode.LeftArrow ) )
            {
                right -= 1.0f;
            }

            float currentSpeed = speed;
            if ( Input.GetKey( KeyCode.LeftShift ) || Input.GetKey( KeyCode.RightShift ) )
            {
                currentSpeed = shiftSpeed;
            }

            float realTimeNow = Time.realtimeSinceStartup;
            float deltaRealTime = realTimeNow - realTime;
            realTime = realTimeNow;

            Vector3 delta = new Vector3( right, 0.0f, forward ) * currentSpeed * deltaRealTime;

            transform.position += transform.TransformDirection( delta );

            Vector3 mousePosition = Input.mousePosition;

            if ( Input.GetMouseButtonDown( 1 ) /* right mouse */)
            {
                startMousePosition = mousePosition;
                startEulerAngles = transform.localEulerAngles;
            }

            if ( Input.GetMouseButton( 1 ) /* right mouse */)
            {
                Vector3 offset = mousePosition - startMousePosition;
                transform.localEulerAngles = startEulerAngles + new Vector3( -offset.y * 360.0f / Screen.height, offset.x * 360.0f / Screen.width, 0.0f );
            }
        }


        //-------------------------------------------------
        void OnGUI()
        {
            if ( showInstructions )
            {
                GUI.Label( new Rect( 10.0f, 10.0f, 600.0f, 400.0f ),
                    "WASD/Arrow Keys to translate the camera\n" +
                    "Right mouse click to rotate the camera\n" +
                    "Left mouse click for standard interactions.\n" );
            }
        }
    }
}