Isosurface.ManifoldDC.OctreeNode.ClusterEdge C# (CSharp) Method

        public static void ClusterEdge(OctreeNode[] nodes, int direction, ref int surface_index, List<Vertex> collected_vertices)
        {
            if ((nodes[0] == null || nodes[0].type != NodeType.Internal) && (nodes[1] == null || nodes[1].type != NodeType.Internal) && (nodes[2] == null || nodes[2].type != NodeType.Internal) && (nodes[3] == null || nodes[3].type != NodeType.Internal))
            {
                ClusterIndexes(nodes, direction, ref surface_index, collected_vertices);
            }
            else
            {
                for (int i = 0; i < 2; i++)
                {
                    OctreeNode[] edge_nodes = new OctreeNode[4];

                    for (int j = 0; j < 4; j++)
                    {
                        if (nodes[j] == null)
                            continue;
                        if (nodes[j].type == NodeType.Leaf)
                            edge_nodes[j] = nodes[j];
                        else
                            edge_nodes[j] = nodes[j].children[Utilities.TEdgeProcEdgeMask[direction, i, j]];
                    }

                    ClusterEdge(edge_nodes, Utilities.TEdgeProcEdgeMask[direction, i, 4], ref surface_index, collected_vertices);
                }
            }
        }