输入系统

使用键盘控制物体移动

参考：

• Input System
• Input Manager
• Vector3

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

public class CameraScript : MonoBehaviour
{
    void Update()
    {
        const float MOVE_SPEED = 0.1f;
        
        if (Input.GetKey(KeyCode.Space))
            transform.Translate(Vector3.up * MOVE_SPEED, Space.World);
        if (Input.GetKey(KeyCode.LeftShift))
            transform.Translate(Vector3.down * MOVE_SPEED, Space.World);
        if (Input.GetKey(KeyCode.W))
            transform.Translate(Vector3.forward * MOVE_SPEED, Space.World);
        if (Input.GetKey(KeyCode.A))
            transform.Translate(Vector3.left * MOVE_SPEED, Space.World);
        if (Input.GetKey(KeyCode.S))
            transform.Translate(Vector3.back * MOVE_SPEED, Space.World);
        if (Input.GetKey(KeyCode.D))
            transform.Translate(Vector3.right * MOVE_SPEED, Space.World);
    }
}

使用鼠标点选物体

参考：

• Input.mousePosition
• Physics.Raycast

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

public class CameraScript : MonoBehaviour
{
    void Update()
    {
        if (Input.GetButtonDown("Fire1"))
        {
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            RaycastHit hit;
            
            if (Physics.Raycast(ray, out hit) && hit.collider.gameObject.CompareTag("Cube"))
            {
                Debug.Log(hit.collider.gameObject.name);
                transform.Rotate(new Vector3(45, 45, 45));
            }
        }
    }
}

使用鼠标拖动物体

参考：Camera.main

using UnityEngine;

public class Cube : MonoBehaviour
{
    private void OnMouseDrag()
    {
        if (UnityEngine.Camera.main == null) return;
        
        var mousePosition = Input.mousePosition;
        mousePosition = new Vector3(mousePosition.x, mousePosition.y, 30);
        transform.position = UnityEngine.Camera.main.ScreenToWorldPoint(mousePosition);
    }
}