using UnityEngine;

namespace Net.Project.B.Feel
{
    public class PreLayerCameraCullingService : MonoBehaviour
    {
        public Camera targetCamera;

        [System.Serializable]
        public struct LayerDistance
        {
            public LayerMask layer;
            public float distance;
        }

        public LayerDistance[] layerDistances;

        private void Start()
        {
            if (targetCamera == null)
            {
                targetCamera = Camera.main;
            }

            var distances = new float[32]; // Unity支持32个Layer
            foreach (var ld in layerDistances)
            {
                int layerIndex = Mathf.RoundToInt(Mathf.Log(ld.layer.value, 2)); // LayerMask转Layer index
                if (layerIndex is >= 0 and < 32)
                {
                    distances[layerIndex] = ld.distance;
                }
            }

            if (!targetCamera) return;
            targetCamera.layerCullDistances = distances;
            targetCamera.layerCullSpherical = true; // 根据球形距离进行剔除（通常更自然）

        }
    }
}