Построитель графиков на C#

                        }

                  }

            } 

            public void Draw_ObjectParametricFunc(Graphics g, Graphic graph)

            {

                  g.SmoothingMode = SmoothingMode.HighQuality;

                  Pen pen = new Pen(Color.Red, 1); 

                  int delta = (int)(graph._end-graph._begin);

                  int a = (int)(delta/graph._step)+1;

                  int b = (int)(delta/graph._step);

                  int axb=a*b; 

                  for(int x=0, y=a; x<axb; x+=a, y+=a)

                  {

                        for(int i=x, j=y, t=0; t<b; i++, j++, t++)

                        {

                              g.DrawLine(pen, (int)graph.vlist_trans[i].x, (int)graph.vlist_trans[i].y, (int)graph.vlist_trans[i+1].x, (int)graph.vlist_trans[i+1].y); 

                              g.DrawLine(pen, (int)graph.vlist_trans[i+1].x, (int)graph.vlist_trans[i+1].y, (int)graph.vlist_trans[j+1].x, (int)graph.vlist_trans[j+1].y); 

                              g.DrawLine(pen, (int)graph.vlist_trans[j+1].x, (int)graph.vlist_trans[j+1].y, (int)graph.vlist_trans[j].x, (int)graph.vlist_trans[j].y); 

                              g.DrawLine(pen, (int)graph.vlist_trans[j].x, (int)graph.vlist_trans[j].y, (int)graph.vlist_trans[i].x, (int)graph.vlist_trans[i].y); 

                        }

                  }

            } 

            public void DrawScene(Graphics g, Graphic graph)

            { 

                  Calculate_and_Transform_Coordinate(graph); 

                  if(Graphic.axes._ModeAxis == 0 || Graphic.axes._ModeAxis == 1)

                  {

                        DrawAxis(g, Graphic.cam.mcam, Graphic.axes, graph.vlist);

                  }

                  //Рисуем график

                  if(graph.TypeFunction == "f(x)=")

                  {

                        Draw_Object2D(g, graph);

                  }

                  else if(graph.TypeFunction == "f(x,y)=")

                  {

                        Draw_Object3D(g, graph);

                  }

                  else if(graph.TypeFunction == "Параметрический вид")

                  {

                        Draw_ObjectParametricFunc(g, graph);

                  } 

                  if(Graphic.axes._ModeAxis == 0 || Graphic.axes._ModeAxis == 1)

                  {

                        DrawAxis(g, Graphic.cam.mcam, Graphic.axes, graph.vlist);

                  }

            } 

            private void Calculate_and_Transform_Coordinate(Graphic graph)

            { 

                  try

                  {

                        graph.InitGraph();

                  }

                  catch (Exception ex)

                  {

                        MessageBox.Show(ex.Message,"Error",MessageBoxButtons.OK, MessageBoxIcon.Error);

                  }

                  //Вычисление  и преобразование координат 

                  graph.MainGraph();

            } 

            public void DrawAxis(Graphics g, Matrix m_cam, Axes axes, Vector[] vlist)//Рисуем координатные оси

            {

                  g.SmoothingMode = SmoothingMode.HighQuality;

                  //цвет осей

                  Pen pen1 = new Pen(axes.currColorAxis, 4);

                  //Цвет меток

                  Pen pen2 = new Pen(axes.currColorLoop, 2);

                  //Цвет названия осей

                  SolidBrush color_name_axis = new SolidBrush(Color.White); 

                  System.Drawing.Drawing2D.LineCap p1 = System.Drawing.Drawing2D.LineCap.Flat;

                  System.Drawing.Drawing2D.LineCap p2 = System.Drawing.Drawing2D.LineCap.ArrowAnchor;

                  pen1.StartCap = p1;

                  pen1.EndCap = p2; 
 

                  if(axes.ScaleAxis == true)

                  {

                        axes.lenght_axis = axes.scale*70;

                  }

                  float delta_x = (int)(axes.scale_x*5);//единица деления 

                  Vector[] vlist_local = new Vector[7];

                  //начало координат

                  vlist_local[0] = new Vector(0, 0, 0);

                  //ось X

                  vlist_local[1] = new Vector(axes.lenght_axis, 0, 0);

                  //ось Y

                  vlist_local[2] = new Vector(0, axes.lenght_axis, 0);

                  //ось Z

                  vlist_local[3] = new Vector(0, 0, axes.lenght_axis);

                  //отрицат. ось

                  vlist_local[4] = new Vector(-axes.lenght_axis, 0, 0);

                  vlist_local[5] = new Vector(0, -axes.lenght_axis, 0);

                  vlist_local[6] = new Vector(0, 0, -axes.lenght_axis); 

                  //положит. оси

                  Vector[] vloop_axis_x = new Vector[60];

                  Vector[] vloop_axis_y = new Vector[60];

                  Vector[] vloop_axis_z = new Vector[60];

                  //отрицат. оси

                  Vector[] vloop_axis_negx = new Vector[60];

                  Vector[] vloop_axis_negy = new Vector[60];

                  Vector[] vloop_axis_negz = new Vector[60];

                  //для отображения сетки

                  Vector[] vloop_grid_x = new Vector[60];

                  Vector[] vloop_grid_y = new Vector[60]; 

                  for(int v=0; v<60; v++)

                  {

                        vloop_axis_x[v] = new Vector();

                        vloop_axis_y[v] = new Vector();

                        vloop_axis_z[v] = new Vector(); 

                        vloop_axis_negx[v] = new Vector();

                        vloop_axis_negy[v] = new Vector();

                        vloop_axis_negz[v] = new Vector(); 

                        vloop_grid_x[v] = new Vector();

                        vloop_grid_y[v] = new Vector();

                  } 

                  float d_x, d_y; 

                  for(int i=0; i<7; i++)

                  {

                        vlist_local[i] = vlist_local[i]*m_cam;

                        vlist_local[i] = vlist_local[i]+axes.world_pos;

                        //Переворачиваем ось у

                        vlist_local[i].y = axes.world_pos.y*2-vlist_local[i].y;

                  }

                  float count_x=0, count_y=0, count_z=0;

                  float step_x=1, step_y=1, step_z=1;

                  float count1=0;

                  float count2=0;

                  /*string marking="";

                  bool b = false;

                  int a=1;

                  double e=0;