Unity中基于Cinemachine实现右键拖拽环绕玩家的相机控制

核心思路 #

不用禁用CinemachineInputProvider的AutoEnableInputs（禁用后会导致轴值停止更新），而是通过控制右键按住状态来切换相机输入的有效性，同时处理鼠标锁定与隐藏，实现类似Roblox的相机逻辑。

具体实现代码 #

替换你现有的CameraController脚本，以下是完整可运行版本：

using UnityEngine;
using UnityEngine.InputSystem;
using Cinemachine;

public class CameraController : MonoBehaviour
{
    [SerializeField] private CinemachineFreeLook freeLookCamera;
    private PlayerInputActions playerControls;
    private InputAction lookAction;
    private InputAction rightClickAction;

    private void Awake()
    {
        playerControls = new PlayerInputActions();
        lookAction = playerControls.Player.Look;
        rightClickAction = playerControls.Player.Drag; // 对应你的右键绑定动作
    }

    private void OnEnable()
    {
        playerControls.Enable();
        rightClickAction.performed += OnRightClickPerformed;
        rightClickAction.canceled += OnRightClickCanceled;
    }

    private void OnDisable()
    {
        playerControls.Disable();
        rightClickAction.performed -= OnRightClickPerformed;
        rightClickAction.canceled -= OnRightClickCanceled;
        // 退出时恢复鼠标状态
        Cursor.lockState = CursorLockMode.None;
        Cursor.visible = true;
    }

    private void OnRightClickPerformed(InputAction.CallbackContext context)
    {
        // 按住右键时：锁定鼠标、隐藏光标、启用相机输入
        Cursor.lockState = CursorLockMode.Locked;
        Cursor.visible = false;
        freeLookCamera.m_XAxis.m_InputAxisName = "Mouse X";
        freeLookCamera.m_YAxis.m_InputAxisName = "Mouse Y";
    }

    private void OnRightClickCanceled(InputAction.CallbackContext context)
    {
        // 松开右键时：解锁鼠标、显示光标、禁用相机输入
        Cursor.lockState = CursorLockMode.None;
        Cursor.visible = true;
        freeLookCamera.m_XAxis.m_InputAxisName = "";
        freeLookCamera.m_YAxis.m_InputAxisName = "";
    }
}

配置说明 #

• CinemachineInputProvider设置：保持AutoEnableInputs为勾选状态，确保Look动作已正确绑定到Input Provider的X Axis和Y Axis（对应FreeLook相机的X、Y轴）。
• PlayerInputActions配置：将Drag动作绑定到鼠标右键（Mouse -> Right Button），Look动作绑定到Mouse -> Delta。
• 脚本挂载：把脚本挂载到包含CinemachineFreeLook组件的相机对象上，在Inspector中拖入对应的freeLookCamera引用。

原脚本无效原因 #

你禁用AutoEnableInputs后，CinemachineInputProvider会停止更新轴值，导致GetAxisValue()始终返回0。正确的逻辑是让Cinemachine负责输入处理，我们只在右键按住时开启输入通道，松开时关闭即可。

内容的提问来源于stack exchange，提问作者Vessbon