[Unity3D] マリオ６４やモンハンなどのカメラ視点からのキー入力の向きに移動する方法

説明

マリオ６４やモンハンなどのカメラ視点からのキー入力の向きに移動するスクリプトです。

カメラにアタッチ

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

/* ###########################################################################################
 * カメラ追尾 
 * 
 * 
 * 
 * 
  #############################################################################################*/

public class Camera_Tracking : MonoBehaviour
{

    public GameObject playerObject;                     //追尾 オブジェクト
    public Vector2 rotationSpeed = new Vector2(3,3);    //回転速度
    private Vector2 lastMousePosition;                  //最後のマウス座標
    private Vector3 lastTargetPosition;                 //最後の追尾オブジェクトの座標


    private float zoom;

    void Start()
    {
        zoom = 0.0f;
        lastMousePosition.x = 0;
        lastMousePosition.y = 0;

        lastTargetPosition = playerObject.transform.position;
    }

    void Update()
    {

        Rotate();
        Zoom();
    }


    void Rotate()
    {
        transform.position += playerObject.transform.position - lastTargetPosition;
        lastTargetPosition = playerObject.transform.position;

        Vector2 nowMouseValue;
        nowMouseValue .x = Input.GetAxisRaw("Mouse X");
        nowMouseValue.y = Input.GetAxisRaw("Mouse Y");

        Vector3 newAngle = Vector3.zero;
        newAngle.x = rotationSpeed.x * nowMouseValue.x;
        newAngle.y = rotationSpeed.y * nowMouseValue.y;

        transform.RotateAround(playerObject.transform.position, Vector3.up, newAngle.x);
        transform.RotateAround(playerObject.transform.position, transform.right, -newAngle.y);
    }

    //拡大縮小
    void Zoom()
    {
        zoom = Input.GetAxis("Mouse ScrollWheel");
        Vector3 offset = new Vector3(0, 0, 0);
        Vector3 pos = playerObject.transform.position - transform.position;

        if (zoom > 0)
        {
            offset = pos.normalized * 1;
        }
        else if (zoom < 0)
        {
            offset = -pos.normalized * 1;

        }
        transform.position = transform.position + offset;
    }
}

プレイヤーにアタッチ

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


/* ###########################################################################################
 * プレイヤー移動
 * 
 * 
 * 
 * 
  #############################################################################################*/

public class moveControl : MonoBehaviour
{
    private Rigidbody rb;
    private Vector3 moveForward;
    public float moveSpeed;

    float inputHorizontal = 0;
    float inputVertical = 0;

    private void FixedUpdate()
    {
        rb.AddForce(moveForward.normalized * moveSpeed);
    }

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

    void Update()
    {
        inputHorizontal = Input.GetAxisRaw("Horizontal");
        inputVertical = Input.GetAxisRaw("Vertical");

        Vector3 cameraForward = Vector3.Scale(Camera.main.transform.forward, new Vector3(1, 0, 1)).normalized;
        moveForward = cameraForward * inputVertical + Camera.main.transform.right * inputHorizontal;
    }
}