TriangleNet.Mesh.FormSkeleton C# (CSharp) Method

        private void FormSkeleton(InputGeometry input)
        {
            Vertex endpoint1, endpoint2;
            int end1, end2;
            int boundmarker;

            this.insegments = 0;

            if (behavior.Poly)
            {
                // If the input vertices are collinear, there is no triangulation,
                // so don't try to insert segments.
                if (triangles.Count == 0)
                {
                    return;
                }

                // If segments are to be inserted, compute a mapping
                // from vertices to triangles.
                if (input.HasSegments)
                {
                    MakeVertexMap();
                }

                boundmarker = 0;

                // Read and insert the segments.
                foreach (var seg in input.segments)
                {
                    this.insegments++;

                    end1 = seg.P0;
                    end2 = seg.P1;
                    boundmarker = seg.Boundary;

                    if ((end1 < 0) || (end1 >= invertices))
                    {
                        if (Behavior.Verbose)
                        {
                            logger.Warning("Invalid first endpoint of segment.", "Mesh.FormSkeleton().1");
                        }
                    }
                    else if ((end2 < 0) || (end2 >= invertices))
                    {
                        if (Behavior.Verbose)
                        {
                            logger.Warning("Invalid second endpoint of segment.", "Mesh.FormSkeleton().2");
                        }
                    }
                    else
                    {
                        // TODO: Is using the vertex ID reliable???
                        // It should be. The ID gets appropriately set in TransferNodes().

                        // Find the vertices numbered 'end1' and 'end2'.
                        endpoint1 = vertices[end1];
                        endpoint2 = vertices[end2];
                        if ((endpoint1.x == endpoint2.x) && (endpoint1.y == endpoint2.y))
                        {
                            if (Behavior.Verbose)
                            {
                                logger.Warning("Endpoints of segments are coincident.", "Mesh.FormSkeleton()");
                            }
                        }
                        else
                        {
                            InsertSegment(endpoint1, endpoint2, boundmarker);
                        }
                    }
                }
            }

            if (behavior.Convex || !behavior.Poly)
            {
                // Enclose the convex hull with subsegments.
                MarkHull();
            }
        }