如何限制Unity相机Y轴旋转并实现玩家朝向移动方向？

失效原因 #

直接操作transform.eulerAngles时，Unity会自动将角度归一化到0~360范围，直接对该值做Mathf.Clamp会出现跳变，无法达到限制效果。

修复步骤 #

1. 新增两个配置参数和一个私有存储变量，用于控制俯仰角范围

[Header("相机设置")]
[Range(-89f, 0f)] public float minPitchAngle = -60f;
[Range(0f, 89f)] public float maxPitchAngle = 60f;
private float _currentPitch = 0f;

2. 修改CameraController方法的俯仰计算逻辑，先对私有变量做累加和限制，再赋值给欧拉角

public void CameraController()
{
    RelativeVector = transform.InverseTransformPoint(FocusPoint.transform.position);
    RelativeVector /= RelativeVector.magnitude;
    TurnDiraction = (RelativeVector.x / RelativeVector.magnitude);
    // 替换原来的俯仰赋值逻辑
    _currentPitch -= touchField.TouchDist.y * Sensivility * Time.deltaTime;
    _currentPitch = Mathf.Clamp(_currentPitch, minPitchAngle, maxPitchAngle);
    FocusPoint.transform.localEulerAngles = new Vector3(_currentPitch, 0, 0);
    FocusPoint.transform.parent.Rotate(transform.up * touchField.TouchDist.x * Sensivility * Time.deltaTime);
}

逻辑调整 #

原有逻辑仅在摇杆纵向输入大于0时触发转向，且绑定相机焦点参数，适配性差。直接基于摇杆输入的移动方向计算目标朝向即可：

public void Movment()
{
    if (characterController.isGrounded && gravityVector.y < 0)
    {
        gravityVector.y = -2;
    }

    gravityVector.y += gravityPower * Time.deltaTime;
    characterController.Move(gravityVector * Time.deltaTime);

    if (characterController.isGrounded)
    {
        motionVector = transform.right * joystick.Horizontal + transform.forward * joystick.Vertical;
        characterController.Move(motionVector * PlayerSpeed * Time.deltaTime);

        // 替换原有转向逻辑
        if (motionVector.magnitude > 0.1f)
        {
            Quaternion targetRotation = Quaternion.LookRotation(new Vector3(motionVector.x, 0, motionVector.z));
            transform.rotation = Quaternion.RotateTowards(transform.rotation, targetRotation, 800 * Time.deltaTime);
            // 同步修正相机父节点旋转，避免转向时相机跟着偏移
            FocusPoint.transform.parent.rotation = Quaternion.RotateTowards(FocusPoint.transform.parent.rotation, targetRotation, 800 * Time.deltaTime);
        }
    }
}

• 俯仰角限制范围不要设置到±90度，避免触发万向锁问题
• 转向速度800可单独提取为公共参数，根据需求调整
• 确保相机父节点仅做水平旋转，FocusPoint仅做上下俯仰，层级关系不要修改

内容的提问来源于stack exchange，提问作者Tou Fix