Layaair Navmesh寻路
14 March 2019
腊鸭基于导航网格的寻路。看官方有个寻路例子。但是进去一看，还是2d基于格子的寻路。这个明显不是3d的寻路。3d都是用navmesh导航网格寻路的。用三角形寻路。 首先写个unity3d插件，导出navmesh数据给腊鸭用。然后腊鸭再加载这个文件进行寻路。
u3d插件代码
using System.IO;
using UnityEditor;
using UnityEngine.SceneManagement;
using UnityEngine;
using UnityEngine.AI;
//navmesh导出数据
public class NavMeshExport : MonoBehaviour
{
[MenuItem("NavMesh/Export")]
static void Export()
{
Debug.Log("NavMesh Export Start");
NavMeshTriangulation navMeshTriangulation = NavMesh.CalculateTriangulation();
//文件路径 路径文件夹不存在会报错
string path = Application.dataPath + "/obj/" + SceneManager.GetActiveScene().name + ".obj";
//新建文件
StreamWriter streamWriter = new StreamWriter(path);
//顶点
for (int i = 0; i < navMeshTriangulation.vertices.Length; i++)
{
streamWriter.WriteLine("v " + (-1*navMeshTriangulation.vertices[i].x) + " " + navMeshTriangulation.vertices[i].y + " " + navMeshTriangulation.vertices[i].z);
}
streamWriter.WriteLine("g pPlane1");
//索引
for (int i = 0; i < navMeshTriangulation.indices.Length;)
{
streamWriter.WriteLine("f " + (navMeshTriangulation.indices[i] + 1) + " " + (navMeshTriangulation.indices[i + 1] + 2) + " " + (navMeshTriangulation.indices[i + 1] + 1));
i = i + 3;
}
streamWriter.Flush();
streamWriter.Close();
AssetDatabase.Refresh();
Debug.Log("NavMesh Export Success");
}
}
通过脚本导出obj后，可以通过threejs的convert_obj_three.py工具转换成js供程序使用