add example

app.py

@@ -271,6 +271,14 @@ def get_model(model_size):
         raise ValueError(f"Unsupported model size: {model_size}")
 
 
+def flip_points(points):
+    flipped = points.copy()
+    flipped[:, 2] = -flipped[:, 2]   # 上下翻转点云
+    return flipped
+
+
+
+
 @spaces.GPU
 def process_video(
     video_file,
@@ -416,6 +424,13 @@ def process_video(
             #* save pcd:  o3d.io.write_point_cloud(f'{pc_save_dir}/{timestamp}_{idx:02d}.ply', pcd)
             points = np.asarray(pcd.points)
             colors = np.asarray(pcd.colors) if pcd.has_colors() else None
+
+
+            # ==== 新增：上下翻转点云 ====
+            points = flip_points(points)
+            # =========================
+
+
             glb_filename = os.path.join(pc_save_dir, f'{timestamp}_{idx:02d}.glb')
             success = create_simple_glb_from_pointcloud(points, colors, glb_filename)
             if not success:
@@ -617,8 +632,6 @@ with gr.Blocks(css=css, title="DKT", head=head_html) as demo:
                 label="Point Cloud Key Frame 1",
                 clear_color=[1.0, 1.0, 1.0, 1.0],
                 interactive=False,
-                # height=400,
-                
             )
         with gr.Column(scale=1):
             output_point_map1 = gr.Model3D(