re-implement bounding box drawing with cylinders.

fix Gradio Chatbot bug; clear comments.

Fix Gradio chatbot messages format for Space rebuild

re-implement round_list function to avoid "np.float64(x.xx)" in the prompt.

update to use gpt-4o as default

make api key part of config

update api key comment

new example.

small updates

Add 5 types of scene. Use [git lfs] to track glb and ply.

initial

initial commit