Create a mesh in Unity

createMesh.cs

IEnumerator CreateMesh(){
        while(inFirst)       
            yield return new WaitForSeconds(0.1f);
        int meshID = 97;
        int cur = 0;
        var resources = Resources.FindObjectsOfTypeAll(typeof(Material));
        foreach(var face in mList){
            int num_of_vertices = Convert.ToInt32(face[face.Count-1]);
            // should we make it hollow?
            if (mMap["special"] == 'H' && cur < 4){
                cur +=2 ;
                continue;
            }
            Vector2[] vertices2D = new Vector2[num_of_vertices];
            int j = 0;
            Debug.Log(cur);
            for (int i = 0; i < face.Count-1; i=i+3){
                if (cur < 4){
                    vertices2D[j] = new Vector2(face[i],face[i+1]);
                } else {
                    vertices2D[j] = new Vector2(face[i],face[i+2]);
                }
                Debug.Log(vertices2D[j]);
                j = j +1;
            }
            Triangulator tr = new Triangulator(vertices2D);
            int[] indices = tr.Triangulate();
            Vector3[] vertices = new Vector3[vertices2D.Length];
            j =0;
            for (int i = 0; i < face.Count-1; i=i+3){

                if (cur < 4){
                    vertices[j] = new Vector3(vertices2D[j].x, vertices2D[j].y,face[i+2]);
                } else {
                    vertices[j] = new Vector3(vertices2D[j].x, face[i+1],vertices2D[j].y);
                }
                Debug.Log(vertices[j]);
                j = j + 1;
            }
            Mesh msh = new Mesh();
            msh.vertices = vertices;
            msh.triangles = indices;
            msh.RecalculateNormals();
            msh.RecalculateBounds();
            // Set up game object with mesh;
            gameObject = GameObject.Find("newObject");

            GameObject child = new GameObject(Char.ToString(Convert.ToChar(meshID)));
            MeshRenderer render = child.AddComponent<MeshRenderer>();

            if (cur<4){ // get the color of the front
                render.material = parseCharacterTexture(mMap["texturefront"]);
                render.material.color = parseCharacterColor(mMap["colorfront"]);
            } else {
                render.material = parseCharacterTexture(mMap["textureside"]);
                render.material.color = parseCharacterColor(mMap["colorside"]);
            }
            child.transform.parent = gameObject.transform;

            MeshFilter filter = child.AddComponent<MeshFilter>();
            filter.mesh = msh;
            cur = cur + 1;
            meshID = meshID + 1;
            msh = new Mesh();
            msh.vertices = vertices;
            msh.triangles = indices;
            msh.RecalculateNormals();
            msh.RecalculateBounds();

            child = new GameObject(Char.ToString(Convert.ToChar(meshID)));
            render = child.AddComponent<MeshRenderer>();

            if (cur<4){ // get the color of the front
                render.material = parseCharacterTexture(mMap["texturefront"]);
                render.material.color = parseCharacterColor(mMap["colorfront"]);
            } else {
                render.material = parseCharacterTexture(mMap["textureside"]);
                render.material.color = parseCharacterColor(mMap["colorside"]);
            }

            child.transform.parent = gameObject.transform;
            filter = child.AddComponent<MeshFilter>();
            filter.mesh = msh;
            cur = cur + 1;
            if (filter != null)
            {
                Mesh mesh = filter.mesh;
    
                Vector3[] normals = mesh.normals;
                for (int i=0;i<normals.Length;i++)
                    normals[i] = -normals[i];
                mesh.normals = normals;
    
                for (int m=0;m<mesh.subMeshCount;m++)
                {
                    int[] triangles = mesh.GetTriangles(m);
                    for (int i=0;i<triangles.Length;i+=3)
                    {
                        int temp = triangles[i + 0];
                        triangles[i + 0] = triangles[i + 1];
                        triangles[i + 1] = temp;
                    }
                    mesh.SetTriangles(triangles, m);
                }
            }
            meshID = meshID + 1;
        }
        inSecond = false;
    }