using UnityEngine;
using System.Collections;

public class Motor : MonoBehaviour {
	public GameObject rotor;
	public float maxRpm = 3000;
	public float speed;
	public float minPitch = 0.8f;
	public float maxPitch = 1.2f;
	public AudioSource soundSource;

	private float[] speedHistory;
	int historyId = 0;

	void Start(){
		speedHistory = new float[15];
		for (int i = 0; i < speedHistory.Length; ++i) {
			speedHistory[i] = 0;
		}
	}

	void Update(){
		if (soundSource != null) {

			speedHistory[historyId] = speed;
			historyId = (historyId + 1) % speedHistory.Length;
			float smoothSpeed = 0;
			
			for (int i = 0; i < speedHistory.Length; ++i) {
				smoothSpeed += speedHistory[i];
			}
			smoothSpeed = smoothSpeed / (float)speedHistory.Length;


			float pitch = (smoothSpeed / maxRpm) * (maxPitch - minPitch) + minPitch;
		


			soundSource.pitch = pitch;

			if(soundSource.isPlaying && speed < 5){
				soundSource.Stop();
			}

			if(!soundSource.isPlaying && speed >=5){
				soundSource.Play();
			}
		
		}
	}
}