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Signed-off-by: TRAfoer <lhf190@outlook.com>

Assets/Scripts/Gird/SimpleGridController.cs

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+using System.Collections.Generic;
+using Ichni;
+using TMPro;
+using UnityEngine;
+
+[RequireComponent(typeof(MeshFilter), typeof(MeshRenderer))]
+public class SimpleGridController : MonoBehaviour
+{
+    public Camera targetCamera => EditorManager.instance.cameraManager.currentCamera;
+
+    [Header("Settings")]
+    public Material gridMaterial;
+    public GameObject textPrefab; // 预制体需要挂载 TextMeshPro
+    public Transform textParent;
+
+    [Header("Grid Logic")]
+    public bool showCoordinates = true;
+    public float baseGridSize = 1.0f;
+    [Range(10f, 1000f)] public float drawDistance = 100f;
+
+
+    // --- 内部状态 ---
+    private MeshRenderer _renderer;
+    private Material _instancedMat;
+    private float _currentSpacing = 1.0f;
+
+    void Start()
+    {
+
+        InitMesh();
+
+        _renderer = GetComponent<MeshRenderer>();
+        if (gridMaterial)
+        {
+            _instancedMat = new Material(gridMaterial);
+            _renderer.material = _instancedMat;
+        }
+
+
+    }
+
+    void LateUpdate()
+    {
+        if (!targetCamera) return;
+
+        Vector3 camPos = targetCamera.transform.position;
+
+        // 1. 网格跟随相机 (无限大地板)
+        transform.position = new Vector3(camPos.x, 0, camPos.z);
+
+        // 2. 计算层级 (1m / 10m / 100m)
+        CalculateGridLevel(camPos.y);
+
+        // 3. 更新 Shader
+        if (_instancedMat)
+        {
+            _instancedMat.SetFloat("_GridSpacing", _currentSpacing);
+            _instancedMat.SetFloat("_FadeDist", drawDistance);
+        }
+
+
+    }
+
+    private void CalculateGridLevel(float camHeight)
+    {
+        float absH = Mathf.Abs(camHeight);
+        float step = baseGridSize;
+
+        // 简单的自适应逻辑：根据高度决定网格密度
+        if (absH > 15f) step *= 10f;
+        if (absH > 150f) step *= 10f;
+
+        _currentSpacing = step;
+    }
+
+
+    private void InitMesh()
+    {
+        MeshFilter mf = GetComponent<MeshFilter>();
+        Mesh mesh = new Mesh();
+        // 覆盖视野的大 Quad
+        float size = 2000f;
+        Vector3[] vertices = new Vector3[4]
+        {
+            new Vector3(-size, 0, -size), new Vector3(size, 0, -size),
+            new Vector3(-size, 0, size), new Vector3(size, 0, size)
+        };
+        mesh.vertices = vertices;
+        mesh.triangles = new int[6] { 0, 2, 1, 2, 3, 1 };
+        mesh.uv = new Vector2[4] { Vector2.zero, Vector2.right, Vector2.up, Vector2.one };
+        mesh.RecalculateBounds();
+        mf.mesh = mesh;
+    }
+}

Assets/Scripts/Gird/SimpleGridController.cs.meta

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