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

public class Ball : MonoBehaviour
{
    public float moveSpeed;
    private Rigidbody rb;
    public AudioClip coinGet;

    // ★追加（ジャンプ）
    public float jumpSpeed;

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

    void Update()
    {
        float moveH = Input.GetAxis("Horizontal");
        float moveV = Input.GetAxis("Vertical");
        Vector3 movement = new Vector3(moveH, 0, moveV);
        rb.AddForce(movement * moveSpeed);

        // ★追加（ジャンプ）
        if (Input.GetButtonDown("Jump"))
        {
            rb.velocity = Vector3.up * jumpSpeed;
        }
    }

    private void OnTriggerEnter(Collider other)
    {
        if (other.CompareTag("Coin"))
        {
            Destroy(other.gameObject);
            AudioSource.PlayClipAtPoint(coinGet, transform.position);
        }
    }
}

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

public class Ball : MonoBehaviour
{
    public float moveSpeed;
    private Rigidbody rb;
    public AudioClip coinGet;
    public float jumpSpeed;

    // ★★改良（空中ジャンプ禁止）
    // boolは「真偽型」と呼ばれ「true」か「false」の２つの値を扱うことができます。
    private bool isJumping = false;

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

    void Update()
    {
        float moveH = Input.GetAxis("Horizontal");
        float moveV = Input.GetAxis("Vertical");
        Vector3 movement = new Vector3(moveH, 0, moveV);
        rb.AddForce(movement * moveSpeed);

        // ★★改良（空中ジャンプ禁止）
        // 「&&」は「包含関係の『かつ』の意味」
        // （例）「A && B」AかつB・・・＞AとBの両方の条件が揃った時
        // 「==」は「左右が等しい」という意味
        if (Input.GetButtonDown("Jump") && isJumping == false)
        {
            rb.velocity = Vector3.up * jumpSpeed;

            // isJumpingという名前の箱の中身を「true」にする。
            isJumping = true;
        }
    }

    private void OnTriggerEnter(Collider other)
    {
        if (other.CompareTag("Coin"))
        {
            Destroy(other.gameObject);
            AudioSource.PlayClipAtPoint(coinGet, transform.position);
        }
    }
}

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

public class Ball : MonoBehaviour
{
    public float moveSpeed;
    private Rigidbody rb;
    public AudioClip coinGet;
    public float jumpSpeed;
    private bool isJumping = false;

    void Start()
    {
        rb = GetComponent<Rigidbody>();   
    }
    
    void Update()
    {
        float moveH = Input.GetAxis("Horizontal");
        float moveV = Input.GetAxis("Vertical");
        Vector3 movement = new Vector3(moveH, 0, moveV);
        rb.AddForce(movement * moveSpeed);

        if (Input.GetButtonDown("Jump") && isJumping == false)
        {
            rb.velocity = Vector3.up * jumpSpeed;
            isJumping = true;
        }
    }

    private void OnTriggerEnter(Collider other)
    {
        if (other.CompareTag("Coin"))
        {
            Destroy(other.gameObject);
            AudioSource.PlayClipAtPoint(coinGet, transform.position);
        }
    }

    // ★★★改良（ジャンプの復活）
    // OnCollisionEnterのスペルに注意
    private void OnCollisionEnter(Collision collision)
    {
        if(collision.gameObject.CompareTag("Floor"))
        {
            isJumping = false;
        }
    }
}