DistanceHaptics.cs

//======= Copyright (c) Valve Corporation, All rights reserved. ===============
//
// Purpose: Triggers haptic pulses based on distance between 2 positions
//
//=============================================================================

using UnityEngine;
using System.Collections;

namespace Valve.VR.InteractionSystem
{
    //-------------------------------------------------------------------------
    public class DistanceHaptics : MonoBehaviour
    {
        public Transform firstTransform;
        public Transform secondTransform;

        public AnimationCurve distanceIntensityCurve = AnimationCurve.Linear( 0.0f, 800.0f, 1.0f, 800.0f );
        public AnimationCurve pulseIntervalCurve = AnimationCurve.Linear( 0.0f, 0.01f, 1.0f, 0.0f );

        //-------------------------------------------------
        IEnumerator Start()
        {
            while ( true )
            {
                float distance = Vector3.Distance( firstTransform.position, secondTransform.position );

                SteamVR_TrackedObject trackedObject = GetComponentInParent<SteamVR_TrackedObject>();
                if ( trackedObject )
                {
                    float pulse = distanceIntensityCurve.Evaluate( distance );
                    SteamVR_Controller.Input( (int)trackedObject.index ).TriggerHapticPulse( (ushort)pulse );
                }

                float nextPulse = pulseIntervalCurve.Evaluate( distance );

                yield return new WaitForSeconds( nextPulse );
            }

        }
    }
}