Methods to adjust the phase of angles

[chiyu1203]

Dear Bonsai community,
I have been working on a 2D navigation task to include heading direction and position, most of the work is done except (The input sequence ranges between 0 and 2π) that I do not know how to adjust the phase angle such that the difference between consecutive angles never exceeds π. I have tried to add conditions to correct the phase as long as the angle goes over the range, but it did not work. In python, this can be achieved by using the numpy.unwrap package. Does anyone know how to implement this idea on Bonsai? Any suggestions would be greatly appreciated!

[chiyu1203]

This is what I have got so far. It did not work because instead of adding the phase to the difference between consecutive angles, the workflow should add the to the original angle and calculated a new difference. This probably requires the use of Scan node but I am not familiar wit that. If anyone has a better idea, feel free to comment below.
unwrap_angle_phase.bonsai.zip

[chiyu1203]

I have created this C# script with chatbot's help. It is able to adjust the angle but if the next event of phase angles shares the same phase difference as the previous event, the second one will not be adjusted, meaning that I need some kind of module to track accumulated number of positive and negative phase difference, so that the number will be the weight of 2pi value for adjustment and Scan is probably the way to go?!
CuratePhase.zip

[chiyu1203]

After spending some time chatting with ChatGPT, I managed to get this C# script working in the workflow. Feel free to re-use it. The trick is to introduce a state variable that update the new phase differences when there is a correction.
CuratePhase.zip

[banchan86]

Just a suggestion, since you said you could do it with numpy.unwrap, do you think the Bonsai Python Scripting package would work for you?

[chiyu1203]

I would love to use that but I am not familiar with the Bonsai Python Scripting package either (I could get create a python environment with that package but I failed to get this python script working in the workflow and retrieve analog signals), so I was not thinking about that direction. Do you have any experience in using bonsai python scripting package with that kind of python script?

[banchan86]

Glad you found a solution! I’m still learning how to use that package.