这个方法做什么用的新手提问

public ModelFeatureList(string name, string dataSource, World CurrentWorld)
            : base(name)
        {
            try
            {
                int count = 0;               
                isSelectable = true;
                this.ParentList = new RenderableObjectList(name);
                XmlDocument docNav = new XmlDocument();
                string path = dataSource;
                docNav.Load(dataSource);
                XmlNode root = docNav["ModelInfomations"];
                for (int i = 0; i < root.ChildNodes.Count; i++)//
                {
                    XmlElement elemenent = (XmlElement)root.ChildNodes[i];
                    string Name = ((XmlElement)root.ChildNodes[i].SelectSingleNode("Name")).InnerText;
                    //string modelUrl = path.Substring(0, path.LastIndexOf('\\') + 1);
                    string Url = ((XmlElement)root.ChildNodes[i].SelectSingleNode("ModelUrl")).InnerText;
                    if (Url.IndexOf("http") == -1)//过滤掉没有.x的.xpc模型
                    {
                        float x = float.Parse(((XmlElement)root.ChildNodes[i].SelectSingleNode("X")).InnerText);// +c / 8000f;
                        float y = float.Parse(((XmlElement)root.ChildNodes[i].SelectSingleNode("Y")).InnerText);// +c / 8000f;
                        float alt = float.Parse(((XmlElement)root.ChildNodes[i].SelectSingleNode("Alt")).InnerText);
                        float yaw = float.Parse(((XmlElement)root.ChildNodes[i].SelectSingleNode("Yaw")).InnerText);
                        float roll = float.Parse(((XmlElement)root.ChildNodes[i].SelectSingleNode("Roll")).InnerText);
                        float pitch = float.Parse(((XmlElement)root.ChildNodes[i].SelectSingleNode("Pitch")).InnerText);
                        float scale = float.Parse(((XmlElement)root.ChildNodes[i].SelectSingleNode("Scale")).InnerText);
                        double maxVisiableDis = 200000;// float.Parse(((XmlElement)root.ChildNodes[i].SelectSingleNode("MaxVisibilityDistance")).InnerText);
                        double minVisiableDis = float.Parse(((XmlElement)root.ChildNodes[i].SelectSingleNode("MinVisibilityDistance")).InnerText);
                        double defaultDis = float.Parse(((XmlElement)root.ChildNodes[i].SelectSingleNode("DefaultViewDistance")).InnerText);
                        string message = ((XmlElement)root.ChildNodes[i].SelectSingleNode("Message")).InnerText;
                        string toolTipText = ((XmlElement)root.ChildNodes[i].SelectSingleNode("ToolTipText")).InnerText;
                        string ClientData = "<?xml version=\"1.0\" encoding=\"utf-16\"?><Feature FeatureClassName=\"模型\"><FieldsData><OBJECTID t=\"0,50\">14085727000100</OBJECTID><TYDM t=\"0,8\">31002051</TYDM><TYBH t=\"0,14\">14085727000100</TYBH><MXH t=\"0,16\">1#冷却塔</MXH><DW t=\"0,20\">地名</DW><MXB t=\"0,10\">站库</MXB><MXX t=\"0,10\"></MXX><MXCZ t=\"0,20\"></MXCZ><MXZT t=\"0,10\">站库</MXZT><YQXS t=\"0,10\"></YQXS><CYFS t=\"0,10\"></CYFS><QK t=\"0,20\"></QK><YTFQ t=\"0,20\">滴西</YTFQ><CW t=\"0,15\"></CW><CWDM t=\"0,10\"></CWDM><GMRotation t=\"2,19,5\">-0.39373799999999998</GMRotation></FieldsData></Feature>";                        //Name = "1haojing";
                        //path = "http://10.72.27.57/building/cyyc/data20070822/data0822_model.xml";
                        m_Layer = new ModelFeatureT(Name, CurrentWorld, path, y, x, alt, scale, yaw, pitch, roll, toolTipText, message, maxVisiableDis, minVisiableDis, defaultDis, ClientData);
                        //m_Layer.Latitude = x;
                        //m_Layer.Longitude = y;
                        //this.ParentList.Add(m_Layer);
                        m_Layer.ParentList = this;
                        m_Layer.IsOn = true;
                        m_Layer.RenderPriority = RenderPriority.Custom;
                        this.m_children.Add(m_Layer);
                        count++;
                    }
                    else
                    {
                        if (path.Contains("building"))
                            continue;
                        double x = double.Parse(root.ChildNodes[i]["X"].InnerText);
                        double y = double.Parse(root.ChildNodes[i]["Y"].InnerText);
                        double alt = double.Parse(root.ChildNodes[i]["Alt"].InnerText);
                        float yaw = float.Parse(root.ChildNodes[i]["Yaw"].InnerText);
                        float roll = float.Parse(root.ChildNodes[i]["Roll"].InnerText);
                        float pitch = float.Parse(root.ChildNodes[i]["Pitch"].InnerText);
                        float scale = float.Parse(root.ChildNodes[i]["Scale"].InnerText);
                        double maxVisiableDis = 200000;
                        double minVisiableDis = float.Parse(root.ChildNodes[i]["MinVisibilityDistance"].InnerText);
                        double defaultDis = float.Parse(root.ChildNodes[i]["DefaultViewDistance"].InnerText);
                        string message = root.ChildNodes[i]["Message"].InnerText;
                        string toolTipText = root.ChildNodes[i]["ToolTipText"].InnerText;
                        string ClientData = "<?xml version=\"1.0\" encoding=\"utf-16\"?><Feature FeatureClassName=\"模型\"><FieldsData><OBJECTID t=\"0,50\">14085727000100</OBJECTID><TYDM t=\"0,8\">31002051</TYDM><TYBH t=\"0,14\">14085727000100</TYBH><MXH t=\"0,16\">1#冷却塔</MXH><DW t=\"0,20\">地名</DW><MXB t=\"0,10\">站库</MXB><MXX t=\"0,10\"></MXX><MXCZ t=\"0,20\"></MXCZ><MXZT t=\"0,10\">站库</MXZT><YQXS t=\"0,10\"></YQXS><CYFS t=\"0,10\"></CYFS><QK t=\"0,20\"></QK><YTFQ t=\"0,20\">滴西</YTFQ><CW t=\"0,15\"></CW><CWDM t=\"0,10\"></CWDM><GMRotation t=\"2,19,5\">-0.39373799999999998</GMRotation></FieldsData></Feature>";                        string Firststr = path.Substring(0, path.IndexOf("xml")) + "xAndPic";
                        string Xpath = Firststr + Url.Substring(Url.ToLower().IndexOf("sdp3dearthfly") + 13, Url.LastIndexOf("/") - Url.ToLower().IndexOf("sdp3dearthfly") - 13) + "/";
                        if (Name.Contains("ford") || Name.Contains("car-shelby") || Name.Contains("launcher") || Name.Contains("nissan"))
                            continue;
                        m_Layer = new ModelFeatureT(Name, CurrentWorld, Xpath, y, x, alt, scale, yaw, pitch, roll, toolTipText, message, maxVisiableDis, minVisiableDis, defaultDis, ClientData);
                        m_Layer.ParentList = this;
                        //this.ParentList.Add(m_Layer);
                        m_Layer.IsOn = true;
                        //m_Layer.Latitude = x;
                        //m_Layer.Longitude = y;
                        m_Layer.RenderPriority = RenderPriority.Custom;
                        this.m_children.Add(m_Layer);
                        count++;
                    }
                }            }
            catch { }
        }