fix bug

app.py

@@ -516,6 +516,8 @@ def sample_diff(ref_cond, target_cond, target_keypts, num_gen, seed, cfg):
     print(f"z.device: {z.device}")
     target_cond = target_cond.repeat(num_gen, 1, 1, 1).to(z.device)
     ref_cond = ref_cond.repeat(num_gen, 1, 1, 1).to(z.device)
+    print(f"target_cond.max(): {target_cond.max()}, target_cond.min(): {target_cond.min()}")
+    print(f"ref_cond.max(): {ref_cond.max()}, ref_cond.min(): {ref_cond.min()}")
     # novel view synthesis mode = off
     nvs = torch.zeros(num_gen, dtype=torch.int, device=device)
     z = torch.cat([z, z], 0)