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