Update app.py

app.py

@@ -51,7 +51,7 @@ def sample_info(sample_id_str, fieldn):
     
         vertex_colors = m.to_rgba(field)[:,:3]
     else:
-        vertex_colors = np.zeros((field.shape[0], 3))
+        vertex_colors = 1+np.zeros((field.shape[0], 3))
     
     # generate mesh
     trimesh = Trimesh(vertices = nodes, faces = triangles)