Code Editor for app.py

import streamlit as st
import plotly.graph_objects as go
import trimesh

st.title('3D OBJ Viewer')

# Upload the OBJ file
uploaded_file = st.file_uploader('Choose an OBJ file', type='obj')
if uploaded_file is not None:
    # Load the mesh using trimesh
    mesh = trimesh.load(uploaded_file)
    
    # Create a Plotly figure
    fig = go.Figure(data=[go.Mesh3d(
        x=mesh.vertices[:, 0],
        y=mesh.vertices[:, 1],
        z=mesh.vertices[:, 2],
        i=mesh.faces[:, 0],
        j=mesh.faces[:, 1],
        k=mesh.faces[:, 2],
        opacity=0.5,
        color='lightblue'
    )])

    # Update layout
    fig.update_layout(scene=dict(
        xaxis=dict(title='X'),
        yaxis=dict(title='Y'),
        zaxis=dict(title='Z'),
    ))
    
    # Show the figure
    st.plotly_chart(fig, use_container_width=True)