topkek

var radius = data.Item2;
                var segments = input.Strokes.Select(s => s.Points.Select(p => new Vector2 { X = (float)p.X, Y = (float)p.Y }).ToArray()).ToList();
                var loopPoint = segments[0][0];

                var currentSegment = 0;
                var runAlgo = true;
                while (runAlgo)
                {
                    var idRef = currentSegment;
                    for (int i = segments[currentSegment].Length - 1; i > 0; i--)
                    {
                        var neighbors = segments.Except(new[] { segments[currentSegment] })
                            .Where(s => s.Any(p => Vector2.Distance(p, segments[currentSegment][i]) <= radius));
                        if(neighbors.Count() == 0)
                        {
                            continue;
                        }
                        var min = neighbors.Min(s => s.Min(p => Vector2.Distance(p, segments[currentSegment][i])));
                        var closestNeighbor = neighbors.First(s => s.Min(p => Vector2.Distance(p, segments[currentSegment][i])) == min);
                        var index = segments.IndexOf(closestNeighbor);
                        currentSegment = index;
                        var point = segments[index].First(p => Vector2.Distance(p, segments[currentSegment][i]) == min);
                        if(point == loopPoint)
                        {
                            runAlgo = false;
                            respectRatio = min / (float)radius;
                        }
                        break;
                    }
                    if(idRef == currentSegment)
                    {
                        runAlgo = false;
                        respected = false;
                    }
                }