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

public class TankMovement2_Velocity : MonoBehaviour
{
    public float turnSpeed;
    private Rigidbody rb;
    private float turnInputValue;

    // ★音の切り替え
    public AudioSource audioSource;
    public AudioClip[] sounds;

    // ★★キャタピラを動かす
    public GameObject cata;

    void Start()
    {
        rb = GetComponent<Rigidbody>();

        audioSource.clip = sounds[0];
        audioSource.Play();
    }

    void Update()
    {
        // 前進
        if(Input.GetKey(KeyCode.LeftShift))
        {
            rb.velocity += transform.forward * 0.3f;

            // ★★キャタピラを動かす
            float offset = Time.time * 1.5f;
            cata.GetComponent<meshrenderer>().material.SetTextureOffset("_MainTex", new Vector2(offset, 0));

            // ★音の切り替え
            if (audioSource.clip == sounds[0])
            {
                audioSource.clip = sounds[1];
                audioSource.Play();
            }    
        }
        else
        {
            // ★音の切り替え
            if (audioSource.clip == sounds[1])
            {
                audioSource.clip = sounds[0];
                audioSource.Play();
            }
        }

        // 後退
        if (Input.GetKey(KeyCode.Z))
        {
            rb.velocity += transform.forward * -0.2f;

            // ★★キャタピラを動かす
            float offset = Time.time * 1.2f;
            cata.GetComponent<meshrenderer>().material.SetTextureOffset("_MainTex", new Vector2(-offset, 0));

            // ★音の切り替え
            if (audioSource.clip == sounds[0])
            {
                audioSource.clip = sounds[2];
                audioSource.Play();
            }
        }
        else
        {
            // ★音の切り替え
            if (audioSource.clip == sounds[2])
            {
                audioSource.clip = sounds[0];
                audioSource.Play();
            }
        }

        TankTurn();
    }

    void TankTurn()
    {
        turnInputValue = Input.GetAxis("Horizontal");
        float turn = turnInputValue * turnSpeed * Time.deltaTime;
        Quaternion turnRotation = Quaternion.Euler(0, turn, 0);
        rb.MoveRotation(rb.rotation * turnRotation);
    }
}