zoomFactor = Math.pow(1.02, (y - lastY));
if (cam.GetParallelProjection() == 1) {
cam.SetParallelScale(cam.GetParallelScale() / zoomFactor);
zoomFactor = Math.pow(1.02, (y - lastY));
if (cam.GetParallelProjection() == 1) {
cam.SetParallelScale(cam.GetParallelScale() / zoomFactor);