public double AngleInDegrees(Vector3 a)
 {
     return(GeoUtils.ToDegrees(this.Angle(a)));
 }
            public void Load(IList <MapPoint> points, int firstPointIndex, int segmentLength, PolygonClosingPole closingPole)
            {
                MapPoint mapPoint  = points[firstPointIndex];
                MapPoint mapPoint2 = points[firstPointIndex + segmentLength - 1];

                this.m_polygonIsClosed  = mapPoint.Equals(mapPoint2);
                this.m_polygonIsCut     = false;
                this.m_polygonPartsList = new List <PolygonPart>();
                PolygonPart polygonPart = new PolygonPart(closingPole);
                MapPoint    mapPoint3   = default(MapPoint);

                for (int i = 0; i < segmentLength; i++)
                {
                    MapPoint mapPoint4 = points[firstPointIndex + i];
                    if (i == 0)
                    {
                        polygonPart.Points.Add(mapPoint4);
                    }
                    else
                    {
                        MapPoint mapPoint5 = mapPoint3;
                        foreach (MapPoint item in GeoUtils.DensifyLine(mapPoint3, mapPoint4, GeoUtils.DEFAULT_DENSIFICATION_ANGLE))
                        {
                            if (Math.Abs(item.X - mapPoint5.X) <= 180.0)
                            {
                                polygonPart.Points.Add(item);
                                mapPoint5 = item;
                            }
                            else if (Math.Abs(item.X) == 180.0)
                            {
                                MapPoint mapPoint6 = new MapPoint(0.0 - item.X, item.Y);
                                polygonPart.Points.Add(mapPoint6);
                                mapPoint5 = mapPoint6;
                            }
                            else if (Math.Abs(mapPoint5.X) == 180.0 && polygonPart.Points.Count == 1)
                            {
                                mapPoint5.X = 0.0 - mapPoint5.X;
                                polygonPart.Points[polygonPart.Points.Count - 1] = mapPoint5;
                                polygonPart.Points.Add(item);
                                mapPoint5 = item;
                            }
                            else
                            {
                                MapPoint mapPoint7 = default(MapPoint);
                                MapPoint mapPoint8 = default(MapPoint);
                                this.FindIntersectionPoints(mapPoint5, item, out mapPoint7, out mapPoint8);
                                if (!mapPoint5.Equals(mapPoint7))
                                {
                                    polygonPart.Points.Add(mapPoint7);
                                }
                                this.m_polygonPartsList.Add(polygonPart);
                                polygonPart = new PolygonPart(closingPole);
                                if (!item.Equals(mapPoint8))
                                {
                                    polygonPart.Points.Add(mapPoint8);
                                }
                                polygonPart.Points.Add(item);
                                this.m_polygonIsCut = true;
                                mapPoint5           = item;
                            }
                        }
                        mapPoint4 = mapPoint5;
                    }
                    mapPoint3 = mapPoint4;
                }
                if (this.m_polygonIsCut && this.m_polygonIsClosed && polygonPart.LastPoint.Equals(this.m_polygonPartsList[0].FirstPoint))
                {
                    polygonPart.Points.RemoveAt(polygonPart.Points.Count - 1);
                    this.m_polygonPartsList[0].Points.InsertRange(0, polygonPart.Points);
                }
                else
                {
                    this.m_polygonPartsList.Add(polygonPart);
                }
                if (!this.m_polygonIsCut && this.m_polygonIsClosed && Math.Abs(polygonPart.FirstPoint.X) == 180.0 && polygonPart.FirstPoint.X == 0.0 - polygonPart.LastPoint.X)
                {
                    this.m_polygonIsCut = true;
                }
            }