Question regarding getEuler and it uses

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Regarding your reply for the second goal, i didn't understand how does it help me.
I can be in a certain place in the space but i can look to a completly different place. As far as i understand these function give me the angle between two points in space which relates to change in degrees in my location.
Since you already answered me that viz.mainview.geteuler doesn't help me i believe i need to extract this data from the sensor itself and than maybe convert it with vizmat or maybe another way that i don't know.
I would ask for a clarify please, i'm confused.