Adding New Points on GLControl

        private void glControl1_Load(object sender, EventArgs e)
        {
            bool loaded = d.Loaded;
 
            a = D.GetDataFromInputFile();
 
            InitGL();
            InitVars();
 
            GL.ClearColor(Color.White);
            GL.Enable(EnableCap.DepthTest);           
 
            for (int i = 0; i < a.GMS.Count(); i++)
            {
                PGASet.Add(
                    new Vector3(
                        Convert.ToSingle(a.GMS.ElementAt(i).PGA[0]), // PGA    
                        Convert.ToSingle(a.GMS.ElementAt(i).Coordinates[1] + 118.538), // Latitude
                        Convert.ToSingle(a.GMS.ElementAt(i).Coordinates[0] - 34.0853))); // Longitude          
            }
 
            if (loaded == true) // this is the updated points
            {
                for (int i = 0; i < d.XGridCounter; i++)
                {
                    for (int j = 0; j < d.YGridCounter; j++)
                    {
                        for (int k = 0; k < d.ZGridCounter; k++)
                        {
                            numberOfNodes = numberOfNodes + 1;
 
                            Nodes.Add(
                                new Vector3(
                                    Convert.ToSingle(a.Grid.ElementAt(i).Coordinates[0]),
                                    Convert.ToSingle(a.Grid.ElementAt(j).Coordinates[1]),
                                    Convert.ToSingle(a.Grid.ElementAt(k).Coordinates[2])));
                        }
                    }
                }
            }

        private void glControl1_Paint(object sender, PaintEventArgs e)
        {
            //if (!loaded) return;
 
            bool loaded = d.Loaded;
 
            a = D.GetDataFromInputFile();
 
            Vector3 lookatPoint = new Vector3((float)Math.Cos(facing), (float)Math.Sin(pitch / 2), (float)Math.Sin(facing));
 
            GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
 
            cameraMatrix = Matrix4.LookAt(location, location + lookatPoint, up);
 
            GL.LoadMatrix(ref cameraMatrix);
 
            GL.Rotate(camera_rotationY, 0, 1, 0);
            GL.Rotate(camera_rotationZ, 0, 0, 1);
 
            paintPGAset();
            paintAxes();
 
            if (loaded == true) // this is the updated points
            {
                paintNodes();
                paintGrid();
            }