public void ZoomChanged(object sender, OrientPosEventArgs e)
{
if (e.Pitch == 0)
{
lastFovy = e.Pitch;
}
float sensitivity = 0.2f;
float angle = e.Pitch - lastFovy;
float tmpFovy = fovy + angle * sensitivity;
if (tmpFovy > 1 && tmpFovy < 179)
{
fovy = tmpFovy;
_scene.UpdateFovy(tmpFovy);
}
lastFovy = e.Pitch;
}