public static ShapeCollectionSave ToShapeCollectionSave(this TiledMapSave tiledMapSave, string layerName)
        {
            MapLayer mapLayer = null;
            if (!string.IsNullOrEmpty(layerName))
            {
                mapLayer = tiledMapSave.Layers.FirstOrDefault(l => l.Name.Equals(layerName));
            }
            var shapes = new ShapeCollectionSave();

            if ((mapLayer != null && !mapLayer.IsVisible && mapLayer.VisibleBehavior == TMXGlueLib.TiledMapSave.LayerVisibleBehavior.Skip) ||
                tiledMapSave.objectgroup == null || tiledMapSave.objectgroup.Count == 0)
            {
                return shapes;
            }

            foreach (mapObjectgroup group in tiledMapSave.objectgroup)
            {
                if ([email protected] != null && !string.IsNullOrEmpty(group.Name) && (string.IsNullOrEmpty(layerName) || group.Name.Equals(layerName)))
                {
                    foreach (mapObjectgroupObject @object in [email protected])
                    {
                        ///November 8th, 2015
                        ///Jesse Crafts-Finch
                        ///If a polygon has a gid, and therefore an image associate with it, it will be turned into a spritesave, not a polygon. 
                        if (@object.gid != null)
                        {
                            continue; 
                        }

                        if (@object.polygon != null)
                        {
                            foreach (mapObjectgroupObjectPolygon polygon in @object.polygon)
                            {
                                // TODO: Make this a rectangle object
                                PolygonSave p = tiledMapSave.ConvertTmxObjectToFrbPolygonSave(@object.Name,
                                    @object.x, @object.y, @object.Rotation, polygon.points, true);
                                if (p != null)
                                {
                                    shapes.PolygonSaves.Add(p);                                   
                                }
                            }
                        }

                        if (@object.polyline != null)
                        {
                            foreach (mapObjectgroupObjectPolyline polyline in @object.polyline)
                            {
                                PolygonSave p = tiledMapSave.ConvertTmxObjectToFrbPolygonSave(@object.Name, 
                                    @object.x, @object.y, @object.Rotation, polyline.points, false);
                                if (p != null)
                                {
                                    shapes.PolygonSaves.Add(p);
                                }
                            }
                        }

                       

                        if (@object.polygon == null && @object.polyline == null)
                        {
                            PolygonSave p = tiledMapSave.ConvertTmxObjectToFrbPolygonSave(@object.Name, @object.x, @object.y, @object.width, @object.height, @object.Rotation, @object.ellipse);
                            if (p != null)
                            {
                                shapes.PolygonSaves.Add(p);
                            }
                        }

                        
                    }
                }
            }
            return shapes;
        }
        private static PolygonSave ConvertTmxObjectToFrbPolygonSave(this TiledMapSave tiledMapSave, string name, double x, double y, double w, double h, double rotation, mapObjectgroupObjectEllipse ellipse)
        {
            var pointsSb = new StringBuilder();

            if (ellipse == null)
            {
                pointsSb.Append("0,0");

                pointsSb.AppendFormat(" {0},{1}", w, 0);
                pointsSb.AppendFormat(" {0},{1}", w, h);
                pointsSb.AppendFormat(" {0},{1}", 0, h);
            }
            else
            {
                const double a = .5;
                const double b = .5;

                // x = a cos t
                // y = b cos t
                var first = true;
                string firstPoint = "";
                for (var angle = 0; angle <= 360; angle += 18)
                {
                    var radians = MathHelper.ToRadians(angle);

                    var newx = a*Math.Cos(radians)*w+w/2;
                    var newy = b*Math.Sin(radians)*h+h/2;
                    if (first)
                    {
                        firstPoint = string.Format("{0},{1}", newx, newy);
                    }
                    pointsSb.AppendFormat("{2}{0},{1}", newx, newy, first ? "" : " ");
                    first = false;
                }

                pointsSb.AppendFormat(" {0}", firstPoint);
            }

            return tiledMapSave.ConvertTmxObjectToFrbPolygonSave(name, x, y, rotation, pointsSb.ToString(), true);
        }
        public static ShapeCollectionSave ToShapeCollectionSave(this TiledMapSave tiledMapSave, string layerName)
        {
            MapLayer mapLayer = null;
            if (!string.IsNullOrEmpty(layerName))
            {
                mapLayer = tiledMapSave.Layers.FirstOrDefault(l => l.Name.Equals(layerName));
            }
            var shapes = new ShapeCollectionSave();

            if ((mapLayer != null && !mapLayer.IsVisible && mapLayer.VisibleBehavior == TMXGlueLib.TiledMapSave.LayerVisibleBehavior.Skip) ||
                tiledMapSave.objectgroup == null || tiledMapSave.objectgroup.Count == 0)
            {
                return shapes;
            }

            foreach (mapObjectgroup group in tiledMapSave.objectgroup)
            {
                if ([email protected] != null && !string.IsNullOrEmpty(group.name) && (string.IsNullOrEmpty(layerName) || group.name.Equals(layerName)))
                {
                    foreach (mapObjectgroupObject @object in [email protected])
                    {
                        if (@object.polygon != null)
                        {
                            foreach (mapObjectgroupObjectPolygon polygon in @object.polygon)
                            {
                                // TODO: Make this a rectangle object
                                PolygonSave p = tiledMapSave.ConvertTmxObjectToFrbPolygonSave(@object.Name,
                                    @object.x, @object.y, @object.Rotation, polygon.points, true);
                                if (p != null)
                                {
                                    shapes.PolygonSaves.Add(p);
                                }
                            }
                        }

                        if (@object.polyline != null)
                        {
                            foreach (mapObjectgroupObjectPolyline polyline in @object.polyline)
                            {
                                PolygonSave p = tiledMapSave.ConvertTmxObjectToFrbPolygonSave(@object.Name,
                                    @object.x, @object.y, @object.Rotation, polyline.points, false);
                                if (p != null)
                                {
                                    shapes.PolygonSaves.Add(p);
                                }
                            }
                        }

                        if (@object.polygon == null && @object.polyline == null)
                        {
                            PolygonSave p = tiledMapSave.ConvertTmxObjectToFrbPolygonSave(@object.Name, @object.x, @object.y, @object.width, @object.height, @object.Rotation, @object.ellipse);
                            if (p != null)
                            {
                                shapes.PolygonSaves.Add(p);
                            }
                        }

                    }
                }
            }
            return shapes;
        }