Create app.py (#1)

- Create app.py (21c61926c2249d7ce8630808ceff8f4453fe87a3)
- add requirements (b8d31c59dcba63498adfb451ac8bd958ba009764)

app.py

@@ -0,0 +1,43 @@
+try:
+    import gradio as gr
+except ImportError as exc:
+    raise ImportError(
+        "gradio is required for gradio functionality. "
+        "Install it with: pip install embed4d[gradio]"
+    ) from exc
+
+from embed4d import model3d_viewer
+
+with gr.Blocks() as demo:
+    gr.Markdown("# GLB Viewer: Custom HTML vs Gradio Model3D")
+
+    with gr.Row():
+        with gr.Column():
+            gr.Markdown("## Embed 4D (3D + time) — lightweight GLB/GLTF animation")
+            file_input = gr.File(file_types=[".glb"], label="Select GLB File")
+            with gr.Row():
+                with gr.Column():
+                    gr.Markdown("### Custom HTML Viewer")
+                    viewer_output_custom = gr.HTML()
+                with gr.Column():
+                    gr.Markdown("### Gradio Model3D")
+                    viewer_output_model3d = gr.Model3D()
+
+    # Update HTML viewer
+    # `gr.File` is dynamically typed; pylint can't see `.change()`.
+    # pylint: disable=no-member
+    file_input.change(
+        lambda file: model3d_viewer(file.name if file else None),
+        inputs=file_input,
+        outputs=viewer_output_custom,
+    )
+
+    # Update Model3D viewer (just pass the file path)
+    file_input.change(
+        lambda file: file.name if file else None,
+        inputs=file_input,
+        outputs=viewer_output_model3d,
+    )
+    # pylint: enable=no-member
+
+demo.launch()

requirements.txt

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+embed4d[gradio]