Update app.py

app.py

@@ -3,28 +3,45 @@ import trimesh
 import tempfile
 import os
 
-def convert(input_path_str):
+def convert_to_3mf(input_path_str):
+    """
+    Convert a mesh file (OBJ) to 3MF format.
+
+    Parameters:
+        input_path_str (str): Path to the input OBJ file.
+
+    Returns:
+        str: Path to the exported 3MF file.
+    """
     with tempfile.TemporaryDirectory() as tmpdir:
         input_path = input_path_str
-        output_path = os.path.join(tmpdir, "output.glb")
+        output_path = os.path.join(tmpdir, "output.3mf")
 
+        # Load mesh
         mesh = trimesh.load(input_path, force='mesh')
 
         if mesh.is_empty:
             raise ValueError("Invalid or empty OBJ mesh.")
 
-        mesh.export(output_path, file_type='glb')
+        # Export to 3MF
+        mesh.export(output_path, file_type='3mf')
 
         if not os.path.exists(output_path):
-            raise FileNotFoundError("Export failed: output.glb not created.")
+            raise FileNotFoundError("Export failed: output.3mf not created.")
+
+        # Copy to persistent temporary file to avoid auto-deletion
+        persistent_tmp = tempfile.NamedTemporaryFile(delete=False, suffix=".3mf")
+        persistent_tmp.close()
+        os.replace(output_path, persistent_tmp.name)
 
-        return output_path
+        return persistent_tmp.name
 
+# Gradio UI setup
 demo = gr.Interface(
-    fn=convert,
+    fn=convert_to_3mf,
     inputs=gr.File(file_types=[".obj"], type="filepath"),
-    outputs=gr.File(file_types=[".glb"]),
-    title="OBJ to glTF (.glb) Converter"
+    outputs=gr.File(file_types=[".3mf"]),
+    title="OBJ to 3MF Converter"
 )
 
 demo.launch()