FireSource.cs

//======= Copyright (c) Valve Corporation, All rights reserved. ===============
//
// Purpose: This object can be set on fire
//
//=============================================================================

using UnityEngine;
using System.Collections;

namespace Valve.VR.InteractionSystem
{
    //-------------------------------------------------------------------------
    public class FireSource : MonoBehaviour
    {
        public GameObject fireParticlePrefab;
        public bool startActive;
        private GameObject fireObject;

        public ParticleSystem customParticles;

        public bool isBurning;

        public float burnTime;
        public float ignitionDelay = 0;
        private float ignitionTime;

        private Hand hand;

        public AudioSource ignitionSound;

        public bool canSpreadFromThisSource = true;

        //-------------------------------------------------
        void Start()
        {
            if ( startActive )
            {
                StartBurning();
            }
        }


        //-------------------------------------------------
        void Update()
        {
            if ( ( burnTime != 0 ) && ( Time.time > ( ignitionTime + burnTime ) ) && isBurning )
            {
                isBurning = false;
                if ( customParticles != null )
                {
                    customParticles.Stop();
                }
                else
                {
                    Destroy( fireObject );
                }
            }
        }


        //-------------------------------------------------
        void OnTriggerEnter( Collider other )
        {
            if ( isBurning && canSpreadFromThisSource )
            {
                other.SendMessageUpwards( "FireExposure", SendMessageOptions.DontRequireReceiver );
            }
        }


        //-------------------------------------------------
        private void FireExposure()
        {
            if ( fireObject == null )
            {
                Invoke( "StartBurning", ignitionDelay );
            }

            if ( hand = GetComponentInParent<Hand>() )
            {
                hand.controller.TriggerHapticPulse( 1000 );
            }
        }


        //-------------------------------------------------
        private void StartBurning()
        {
            isBurning = true;
            ignitionTime = Time.time;

            // Play the fire ignition sound if there is one
            if ( ignitionSound != null )
            {
                ignitionSound.Play();
            }

            if ( customParticles != null )
            {
                customParticles.Play();
            }
            else
            {
                if ( fireParticlePrefab != null )
                {
                    fireObject = Instantiate( fireParticlePrefab, transform.position, transform.rotation ) as GameObject;
                    fireObject.transform.parent = transform;
                }
            }
        }
    }
}