TriangleNet下载如下：
TriangleNet
效果如下：
代码参考如下：
using System.Collections.Generic;
using UnityEngine;
using TriangleNet.Geometry;public class TestTriangleNet : MonoBehaviour
{[SerializeField]Material material;void Start(){Vector3[] vs = new Vector3[625];for (int i = 0; i < vs.Length; i++){vs[i] = new Vector3(i % 25, 0, i / 25);}Polygon poly = new();foreach (var v in vs){poly.Add(new Vertex(v.x, v.z));}//设置外轮廓Vertex[] vertexOut = new Vertex[] { new(1, 10), new(3, 16), new(10, 19), new(16, 16), new(19, 10), new(16, 3), new(10, 1), new(3, 8) };poly.Add(new Contour(vertexOut), false);//设置洞洞1Vertex[] vertexIn01 = new Vertex[] { new(2, 10), new(4, 12), new(6, 10), new(4, 8) };poly.Add(new Contour(vertexIn01), true);//设置洞洞2Vertex[] vertexIn02 = new Vertex[] { new(12, 6), new(14, 8), new(16, 6), new(14, 4) };poly.Add(new Contour(vertexIn02), true);var options = new TriangleNet.Meshing.ConstraintOptions{SegmentSplitting = 1,ConformingDelaunay = false,Convex = false};//生成Triangle网格var triangleMesh = ExtensionMethods.Triangulate(poly, options);List<Vector3> listVert = new();foreach (Vertex v in triangleMesh.Vertices){listVert.Add(new Vector3(v.X, 0, v.Y));}List<int> listTriangle = new();foreach (var tm in triangleMesh.Triangles){listTriangle.Add(tm.GetVertexID(1));listTriangle.Add(tm.GetVertexID(0));listTriangle.Add(tm.GetVertexID(2));}Mesh mesh = new(){vertices = listVert.ToArray(),triangles = listTriangle.ToArray()};mesh.RecalculateNormals();MeshFilter filter = GetComponent<MeshFilter>();if (!filter) filter = gameObject.AddComponent<MeshFilter>();filter.sharedMesh = mesh;MeshRenderer meshRenderer = GetComponent<MeshRenderer>();if(!meshRenderer)meshRenderer = gameObject.AddComponent<MeshRenderer>();meshRenderer.material = material;}
}如果不想中间挖洞，使用下面的代码即可：
using System.Collections.Generic;
using UnityEngine;
using TriangleNet.Geometry;
using static UnityEditor.Progress;public class TestTriangleNet : MonoBehaviour
{[SerializeField]Material material;void Start(){Vector3[] vs = new Vector3[625];for (int i = 0; i < vs.Length; i++){vs[i] = new Vector3(i % 25, 0, i / 25);}Polygon poly = new();foreach (var v in vs){poly.Add(new Vertex(v.x, v.z));}var triangleMesh = poly.Triangulate();List<Vector3> listVert = new();foreach (Vertex v in triangleMesh.Vertices){listVert.Add(new Vector3(v.X, 0, v.Y));}List<int> listTriangle = new();foreach (var tm in triangleMesh.Triangles){listTriangle.Add(tm.GetVertexID(1));listTriangle.Add(tm.GetVertexID(0));listTriangle.Add(tm.GetVertexID(2));}Mesh mesh = new(){vertices = listVert.ToArray(),triangles = listTriangle.ToArray()};mesh.RecalculateNormals();MeshFilter filter = GetComponent<MeshFilter>();if (!filter) filter = gameObject.AddComponent<MeshFilter>();filter.sharedMesh = mesh;MeshRenderer meshRenderer = GetComponent<MeshRenderer>();if(!meshRenderer)meshRenderer = gameObject.AddComponent<MeshRenderer>();meshRenderer.material = material;}
}
