Refactor gen_image function in app.py to utilize NamedTemporaryFile for GLB file creation, enhancing file management and simplifying cleanup. Return the path of the temporary GLB file directly.

app.py

@@ -110,24 +110,16 @@ def gen_image(input_image, seed, scale, step):
     # Create a temporary file with a proper name for the GLB data
     import tempfile
     import shutil
-    import os
     
-    # Create a temporary file with a proper extension in a persistent location
-    temp_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), "temp")
-    os.makedirs(temp_dir, exist_ok=True)
-    temp_glb = os.path.join(temp_dir, f"model_{seed}.glb")
+    # Create a temporary file with a proper extension
+    temp_glb = tempfile.NamedTemporaryFile(suffix='.glb', delete=False)
+    temp_glb.close()
     
     # Copy the generated GLB file to our temporary file
-    shutil.copy2(glb_path, temp_glb)
-    
-    # Clean up the original GLB file
-    try:
-        os.remove(glb_path)
-    except:
-        pass
+    shutil.copy2(glb_path, temp_glb.name)
     
     # Return images and the path to the temporary GLB file
-    return Image.fromarray(np_imgs), Image.fromarray(np_xyzs), temp_glb
+    return Image.fromarray(np_imgs), Image.fromarray(np_xyzs), temp_glb.name
 
 
 parser = argparse.ArgumentParser()