int calibrationState = 0;
        float calibrationMargin = .1f;

        Warper warper = new Warper();
        float[] srcX = new float[4];
        float[] srcY = new float[4];
        float[] dstX = new float[4];
        float[] dstY = new float[4];

switch (calibrationState)
                    {
                        case 1:
                            srcX[calibrationState - 1] = warpedX1;
                            srcY[calibrationState - 1] = warpedY1;
                            calibrationState = 2;
                            doCalibration();
                            break;
                        case 2:
                            srcX[calibrationState - 1] = warpedX1;
                            srcY[calibrationState - 1] = warpedY1;
                            calibrationState = 3;
                            doCalibration();
                            break;
                        case 3:
                            srcX[calibrationState - 1] = warpedX1;
                            srcY[calibrationState - 1] = warpedY1;
                            calibrationState = 4;
                            doCalibration();
                            break;
                        case 4:
                            srcX[calibrationState - 1] = warpedX1;
                            srcY[calibrationState - 1] = warpedY1;
                            calibrationState = 5;
                            doCalibration();
                            break;
                        default:
                            break;
                    }//calibtation state

        public void doCalibration(){
int x = 0;
            int y = 0;
            int size = 25;
            Pen p = new Pen(Color.Red);
            switch (calibrationState)
            {
                case 1:
                    x = (int)(screenWidth * calibrationMargin);
                    y = (int)(screenHeight * calibrationMargin);
                    cf.showCalibration(x, y, size, p);
                    dstX[calibrationState - 1] = x;
                    dstY[calibrationState - 1] = y;
                    break;
                case 2:
x = screenWidth - (int)(screenWidth * calibrationMargin);
                    y = (int)(screenHeight * calibrationMargin);
                    cf.showCalibration(x, y, size, p);
                    dstX[calibrationState - 1] = x;
                    dstY[calibrationState - 1] = y;
                    break;
                case 3:
                    x = (int)(screenWidth * calibrationMargin);
                    y = screenHeight -(int)(screenHeight * calibrationMargin);
                    cf.showCalibration(x, y, size, p);
                    dstX[calibrationState - 1] = x;
                    dstY[calibrationState - 1] = y;
                    break;
                case 4:
x = screenWidth - (int)(screenWidth * calibrationMargin);
                    y = screenHeight -(int)(screenHeight * calibrationMargin);
                    cf.showCalibration(x, y, size, p);
                    dstX[calibrationState - 1] = x;
                    dstY[calibrationState - 1] = y;
                    break;
                case 5:
                    //compute warp
                    warper.setDestination(dstX[0], dstY[0], dstX[1], dstY[1], dstX[2], dstY[2], dstX[3], dstY[3]);
                    warper.setSource(srcX[0], srcY[0], srcX[1], srcY[1], srcX[2], srcY[2], srcX[3], srcY[3]);
                    warper.computeWarp();
                    cf.Close();
                    cf = null;
calibrationState = 0;
                    cursorControl = true;
                    BeginInvoke((MethodInvoker)delegate() { cbCursorControl.Checked = cursorControl; });
//                    saveCalibrationData();
                    UpdateTrackingUtilization();
                    break;
                default:
                    break;
            }

        }