preview rotated model

app.py

@@ -478,8 +478,14 @@ def process_image_and_generate_stl(image_input, depth_near, depth_far, thickness
         prepare_for_3d_printing=True,
         lift_height=-lift
     )
-
-    return stl_path, stl_path # Return the path to the generated STL file
+    preview_path = stl_path.replace(".stl", "_preview.stl")
+    mesh = trimesh.load(stl_path)
+    rot = trimesh.transformations.rotation_matrix(np.radians(180), [0, 0, 1])
+    rot2 = trimesh.transformations.rotation_matrix(np.radians(-90),[0, 1, 0])
+    mesh.apply_transform(rot)
+    mesh.apply_transform(rot2)
+    mesh.export(preview_path)
+    return stl_path, preview_path # Return the path to the generated STL file
 
 
 # Gradio Interface definition