UnityEngine.Geometry.Subdivide C# (CSharp) Method

        public static void Subdivide(List<Vector3> vectors, List<int> indices, bool removeSourceTriangles)
        {
            var midpointIndices = new Dictionary<string, int>();

            var newIndices = new List<int>(indices.Count * 4);

            if (!removeSourceTriangles)
                newIndices.AddRange(indices);

            for (var i = 0; i < indices.Count - 2; i += 3)
            {
                var i0 = indices[i];
                var i1 = indices[i + 1];
                var i2 = indices[i + 2];

                var m01 = GetMidpointIndex(midpointIndices, vectors, i0, i1);
                var m12 = GetMidpointIndex(midpointIndices, vectors, i1, i2);
                var m02 = GetMidpointIndex(midpointIndices, vectors, i2, i0);

                newIndices.AddRange(
                    new[] {
                    i0,m01,m02
                    ,
                    i1,m12,m01
                    ,
                    i2,m02,m12
                    ,
                    m02,m01,m12
                    }
                    );

            }

            indices.Clear();
            indices.AddRange(newIndices);
        }