update the pose param range in UI

app.py

@@ -38,7 +38,7 @@ model, state = fetch_model()
 pi = math.pi
 st.sidebar.image("images/diet-nerf.png", width=310)
 st.sidebar.header('SELECT YOUR VIEW DIRECTION')
-theta = st.sidebar.slider("Theta", min_value=0., max_value=2.*pi,
+theta = st.sidebar.slider("Theta", min_value=-pi, max_value=pi,
                           step=0.5, value=0.)
 phi = st.sidebar.slider("Phi", min_value=0., max_value=0.5*pi,
                         step=0.1, value=1.)