Установка через Unity Package Manager / Add package from git URL: https://github.com/Nox7atra/Triangle.Net-for-Unity.git?path=/Assets/TriangleNet
Article about (rus): https://habr.com/post/435374/
public static void Add(this Polygon polygon, List contour, bool isHole = false) - Add contour to Polygon
public static void Add(this Polygon polygon, Vector2 vertex) - Add vertex to Polygon
public static Mesh GenerateUnityMesh(this TriangleNetMesh triangleNetMesh, QualityOptions options = null) - Generate Unity Mesh