WFA_psychometric_chart.Form_handler.plot_by_DBT_HR_process_diagram C# (CSharp) Method

        public int plot_by_DBT_HR_process_diagram(double DBT, double HR)
        {
            /*
             *We need to cal x-asis which is given by DBT
             */
            // MessageBox.Show("reached here dbt=" + DBT + ", hr = " + HR);
            int x_axis = (int)DBT;

            //here the HR is  relative humidity like 20%,30% etc os phi = 0.3 for 30%
            double phi = HR;
            //we need to calculate the y-axis value
            /*For y axis the value has to be pulled from the t_pg text file....
             */
            //lets create two arraylist to add those and store it in the arraylist
            ArrayList temperature_value = new ArrayList();
            ArrayList pg_value_from_txtfile = new ArrayList();

            //--Copying the ref temp and humidity to temporary arraylist
            temperature_value = t;
            pg_value_from_txtfile = pg;
            double patm = form1Object.AirPressureFromDB * 0.001;//in kpa//101.235;//constant..we will make it take as input later...
            //double rair = 0.287;//rideburg constant i guess
            double wg_calc = 0;
            double pg_value = 0.000000;
            //now for corresponding DBT lets calculate constant value pg..
            try
            {
                for (int i = 0; i < temperature_value.Count; i++)
                {
                    ///x-axis contains the DBT
                    if (DBT == Double.Parse(temperature_value[i].ToString()))
                    {
                        //if matched find the corresponding pg_value
                        pg_value = Double.Parse(pg_value_from_txtfile[i].ToString());
                        break;//break out of loop.
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            //now calc the y axis.
            //wg_calc =  622 * pg_value / (patm - pg_value);
            wg_calc = (622 * phi * pg_value / (patm - phi * pg_value));
            //MessageBox.Show("pg_value=" + pg_value + ",wg_calc" + wg_calc);
            double y_axis = wg_calc;

            plot_on_graph_values_process_diagram(DBT, HR, x_axis, y_axis);

            //MessageBox.Show("reached series print" +series1.ToString());

            // index++;

            return 0;
        }