Update app.py

app.py

@@ -196,8 +196,8 @@ def pano_depth_to_world_points(depth, scale):
     lon, lat = np.meshgrid(lon, lat)
 
     i = 0
-    pts3d = []
-    uv = []
+    pts3d = [[]]
+    uv = [[]]
     while i < 9:
         d_lon = (np.random.rand(depth.shape[0]*depth.shape[1]) - 0.5) * np.pi*2 / depth.shape[1]
         d_lat = (np.random.rand(depth.shape[0]*depth.shape[1]) - 0.5) * np.pi / depth.shape[0]