<p>CuraEngine transfer the progress and slice data with the help of the C++ library <a href="https://github.com/Ultimaker/libArcus" rel="nofollow noreferrer">libArcus</a> which is a wrapper around the Google Protobuf library.
The Python binding for libArcus are <a href="https://github.com/Ultimaker/pyArcus" rel="nofollow noreferrer">pyArcus</a>.</p>
<p>If you want to send messages to CuraEngine with Arcus check how it is done in the <a href="https://github.com/Ultimaker/Cura/tree/main/plugins/CuraEngineBackend" rel="nofollow noreferrer">CuraEngineBackend</a> plugin on the Cura side and the <a href="https://github.com/Ultimaker/CuraEngine/tree/main/src%2Fcommunication" rel="nofollow noreferrer">communication</a> source code for the CuraEngine side.</p>
<p>But please take note of the CuraEngine, libArcus, and pyArcus licenses these also apply when using them in a cloud slicer.</p>

CC BY-SA 4.0
2022-12-27T22:04:00.857Z
2022-12-27T22:04:00.857Z
Jelle Spijker
<p>I have a simple browser based interface that uses php's exec function to run CuraEngine on an stl file that a client uploads. It is based on the source code provided by Jesse Campbell in his 3dpartprice.com site.  I am looking for a way to make a progress bar of the slicing process. Does CuraEngine output data about the slice progress? The Cura app with a GUI has a progress bar that updates while the model is being sliced. What data is driving this progress bar? Any suggestions of different approaches to get a progress bar from CuraEngine's slicing process?</p>

<ultimaker-cura>
Cura UI slice progress bar read data from CuraEngine
Leo Aguiar
# Cura UI slice progress bar read data from CuraEngine

(Asked by: username_0 on 2022-10-24)

I have a simple browser based interface that uses php's exec function to run CuraEngine on an stl file that a client uploads. It is based on the source code provided by Jesse Campbell in his 3dpartprice.com site. I am looking for a way to make a progress bar of the slicing process. Does CuraEngine output data about the slice progress? The Cura app with a GUI has a progress bar that updates while the model is being sliced. What data is driving this progress bar? Any suggestions of different approaches to get a progress bar from CuraEngine's slicing process?

**Tags:** ultimaker-cura

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## 1 answers

### Answer by username_1 on 2022-12-27. Score: 2

CuraEngine transfer the progress and slice data with the help of the C++ library [libArcus](https://github.com/Ultimaker/libArcus) which is a wrapper around the Google Protobuf library.
The Python binding for libArcus are [pyArcus](https://github.com/Ultimaker/pyArcus).

If you want to send messages to CuraEngine with Arcus check how it is done in the [CuraEngineBackend](https://github.com/Ultimaker/Cura/tree/main/plugins/CuraEngineBackend) plugin on the Cura side and the [communication](https://github.com/Ultimaker/CuraEngine/tree/main/src%2Fcommunication) source code for the CuraEngine side.

But please take note of the CuraEngine, libArcus, and pyArcus licenses these also apply when using them in a cloud slicer.


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