using UnityEngine;
using Cinemachine;

/// <summary>
/// Cinemachine Extension: 垂直跟随，水平锁定
/// </summary>
[ExecuteAlways]
[SaveDuringPlay]
[AddComponentMenu("")]
public class LockHorizontalPositionExtension : CinemachineExtension
{
    [Tooltip("锁定的 X 坐标")]
    public float LockedX = 0f;
    
    // [Tooltip("锁定的 Z 坐标")]
    // public float LockedZ = -10f;
    
    protected override void PostPipelineStageCallback(
        CinemachineVirtualCameraBase vcam,
        CinemachineCore.Stage stage, 
        ref CameraState state, 
        float deltaTime)
    {
        // 在 Body 阶段后修改位置
        if (stage == CinemachineCore.Stage.Body)
        {
            Vector3 pos = state.FinalPosition;
            pos.x = LockedX;
            // pos.z = LockedZ;
            state.PositionCorrection += pos - state.FinalPosition;
        }
    }
}