Create app.py

app.py

@@ -0,0 +1,16 @@
+import gradio as gr
+from pathlib import Path
+
+MODEL_PATH = "./mainABC.glb"   # put main.glb next to this file
+
+def get_model():
+    # return a local path (Gradio will serve it)
+    return MODEL_PATH if Path(MODEL_PATH).exists() else None
+
+with gr.Blocks() as demo:
+    gr.Markdown("## 3rd Floor — interactive viewer")
+    model_view = gr.Model3D(value=None, label="3D model")
+    btn = gr.Button("Load model")
+    btn.click(fn=get_model, inputs=None, outputs=model_view)
+
+demo.launch()