Построитель графиков на C#

                  }

            }

            public float scale_z;//масштаб графика по оси Z

            public float _scale_z

            {

                  get {return scale_z;}

                  set

                  {

                        scale_z = value;

                  }

            }

            public Color currColorObject1 = new Color();//цвет графика f(x)

            public Color currColorObject2 = new Color();//цвет графика f(x,y)

            public Color _currColorObject1

            {

                  get {return currColorObject1;}

                  set

                  {

                        currColorObject1 = value;

                  }

            }

            public Color _currColorObject2

            {

                  get {return currColorObject2;}

                  set

                  {

                        currColorObject2 = value;

                  }

            } 

            public bool ScaleGraphX;

            public bool _ScaleGraphX

            {

                  get {return ScaleGraphX;}

                  set

                  {

                        ScaleGraphX = value;

                  }

            }

            public bool ScaleGraphY;

            public bool _ScaleGraphY

            {

                  get {return ScaleGraphY;}

                  set

                  {

                        ScaleGraphY = value;

                  }

            }

            public bool ScaleGraphZ;

            public bool _ScaleGraphZ

            {

                  get {return ScaleGraphZ;}

                  set

                  {

                        ScaleGraphZ = value;

                  }

            }

            public bool Light;//используется виртуальное освещение графика

            public bool _Light

            {

                  get {return Light;}

                  set

                  {

                        Light = value;

                  }

            }

            public bool Skelet;//показывается ли каркас графика?

            public bool _Skelet

            {

                  get {return Skelet;}

                  set

                  {

                        Skelet = value;

                  }

            }

            public string TypeFunction; 

            public Graphic()

            {

                  TypeFunction = " ";

                  expression1 = " ";

                  //цвет графика  от одной переменной

                  _currColorObject1 = Color.Black;

                  //цвет графика  от двух переменных

                  _currColorObject2 = Color.Yellow; 

                  //масштабирование  графика по оси X

                  _scale_x = 5;

                  //масштабирование  графика по оси Y

                  _scale_y = 5;

                  //масштабирование  графика по оси Z

                  _scale_z = 5;

                  //Освещение(по  умолчанию: выключено)

                  _Light = false;

                  //Каркас(по умолчанию: выключено)

                  _Skelet = false;

                  //масштабирование  графика по оси X(по умолчанию:  вкл.)

                  _ScaleGraphX = true;

                  //масштабирование  графика по оси Y(по умолчанию:  вкл.)

                  _ScaleGraphY = true;

                  //масштабирование  графика по оси Z(по умолчанию: вкл.)

                  _ScaleGraphZ = true;

                  //Инициализация  таблицы синусов и косинусов

                  m.Build_Sin_Cos_Tables(); 

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

                  {

                        vlist_local[i] = new Vector();

                        vlist_trans[i] = new Vector();

                  }

                  for(int i=0; i<MAX_NUM_VERTICES/4; i++)

                  {

                        state[i] = VISIBLE;

                  }

            }

            public bool simbol_find(string expression, char find, ref int i)

            {

                  for(i=i; i<expression.Length; i++)

                  {

                        if(expression[i] == find)

                              return true;

                  }

                  return false;

            }

            private void CalculateCoord2D(ref int num_vert, string expression)

            {

                  SyntaxAnalyzer sa = new SyntaxAnalyzer();

                  int num = -1;  

                  int vert = 0;            

                  for(float i=begin; i<=end; i+=(float)step, vert++)

                  {

                        num++;  

                        vlist_local[num].x = (float)Math.Round(i, 2);

                        vlist_local[num].y=sa.Function(vlist_local[num].x, 0, expression, 1);

                        vlist_local[num].z=0;  

                  } 

                  num_vert = num+1; //в num_vert хранится кол-во вершин

            } 

            private void CalculateCoord3D(ref int num_vert, string expression)

            {

                  SyntaxAnalyzer sa = new SyntaxAnalyzer();

                  int num = -1;//счетчик вершин

                  //здесь _begin исправить

                  float begin_, end_, step_;