Yaw Pitch & Roll to spherical Theta & Phi

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Discussion Overview

The discussion focuses on the conversion of yaw, pitch, and roll angles into spherical coordinates, specifically Theta and Phi. The context involves using a smartphone orientation sensor for a project that requires calculating the smartphone's normal vector projection.

Discussion Character

  • Exploratory, Technical explanation

Main Points Raised

  • One participant requests guidance on how to derive Theta and Phi from yaw, pitch, and roll.
  • Another participant emphasizes the need to define the orientation of the spherical coordinate system in relation to the yaw, pitch, and roll axes.
  • A further clarification is sought regarding the meaning of "orient the spherical system in space."
  • One participant specifies that yaw is around the Z axis, pitch is around the X axis, and roll is around the Y axis.

Areas of Agreement / Disagreement

Participants have not reached a consensus, as the discussion involves clarifying definitions and relationships between the coordinate systems before proceeding with the calculations.

Hadar Szostak
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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.
 
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First you must tell us how you want to orient the spherical system in space. Then maybe the question can be answered.
 
sorry but what do you mean by "orient the spherical system in space"?
 
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.
 
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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