Summary I am trying to use streamlit with ROS where I get PointCloud2 messages which I can convert to numpy arrays - Nx4 I want to be able to display these in real-time - something like in RVIZ in ROS. How may I do that? Basically, I would like to plot the 3D points, be able to zoom, pan, rotate …

Hi @SM1991CODES This seems to be possible, I’d recommend to look into the rospy library in Python to retrieve the data. Next, use plotly to render the data points from ROS as a 3D scatter plot. Then, use st.plotly_chart - Streamlit Docs to display the plot in a Streamlit app. Best regards, Chan…

Hi, Thank you for the reply. Getting data from ros is not the main problem, I already have code for that. Problem is, plotly scatter_3d or matplotlib 3d produce very bad 3D visualizations. I use mayavi generally or rviz if withing ros. So, is it somehow possible to use mayavi or PyVista or some…

Hi @SM1991CODES @edsaac had created a Streamlit component stpyvista that allows you to use pyvista in a Streamlit app. Also check out his demo app https://stpyvista.streamlit.app/ Best regards, Chanin

Thanks for the link, looks promising. I will check it out. However, based on my use case, there is another problem - how do I make certain widgets update automatically at intervals? The idea is - click and button (draw point clouds) and then the Pyvista widget should update with new point clouds f…

I am aware of this. I have a somewhat similar way of refreshing. But I am looking for something more robust and proper. Nevertheless, thanks a lot. I will try out the 3D point cloud plot and update in a day or two. But - you have created a great framework, I really like it and would love to see it…

To your point 5, you may be interested in the discussion about changing keyed widget behavior. Session state “losing” parameters is tied to the widget cleanup process and I’m guessing that’s what you came across. Namely, when a widget is not rendered on the screen, it’s data gets deleted (including …

How to plot a simple 3D point cloud without any map and update it regularly?

Using Streamlit

dataprofessor April 30, 2023, 3:50am 6

Hi,

@kmcgrady has created a custom component called Streamlit Autorefresh that may possibly be what you’re looking for.

Best regard,
Chanin

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How to plot a simple 3D point cloud without any map and update it regularly?

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