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Yaw Pitch & Roll to spherical Theta & Phi

  1. Dec 20, 2014 #1
    hi guys,
    can someone please tell me how to find Theta and Phi from Yaw Pitch and Roll?
    I use my smartphone orientation sensor on a project and i need to calculate the smartphone's normal vector projection.
     
  2. jcsd
  3. Dec 20, 2014 #2

    OldEngr63

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    Gold Member

    First you must tell us how you want to orient the spherical system in space. Then maybe the question can be answered.
     
  4. Dec 20, 2014 #3
    sorry but what do you mean by "orient the spherical system in space"?
     
  5. Dec 20, 2014 #4

    OldEngr63

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    Do you want the polar axis to represent your roll axis, or perhaps your yaw axis? Define how the polar coordinate system is to be related to the roll, pitch, and yaw axes.
     
  6. Dec 20, 2014 #5
    oh sorry,
    yaw is around Z axis
    pitch is around x axis
    roll is around y axis
    upload_2014-12-20_21-23-29.png
     
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