Re: Attiude with quaternions----

I still forgot lots of details; so I uploaded the entire set of TurboPascal units related to Euler angles and quaternions to my website;
URL is http://www.xs4all.nl/~jemebius/Eulerang.zip - please feel free to use this stuff as freeware and open source.

Johan E. Mebius

Steffen Loringer wrote:

Hi,

I have the following quaternions:
q1: -0.552710
q2: -0.441034
q3: -0.604951
q4:  0.366106

and the attitude with YPR
yaw:     -97.406°
pitch:      20.230°
roll:      -90.000°

but I can't figure out how to get the YPR values from the Quaternions.

Can someone explain it the easy was?

Thanks a lot
Steve

.

Relevant Pages

  • Re: Defining Rotations Limits using Quaternions In 3d Space
    ... the rotation that occurs between ones upper and lower arm at the elbow ... using euler angles it may be achieved using 3 such angles. ... I am looking to achieve this using one or more quaternions. ... The example for the human arm is a difficult one: ...
    (comp.graphics.algorithms)
  • Re: Euler angles and tweening/interpolation
    ... My engine has nodes that contain the spatial information. ... Euler angles are more meaningful to someone using the node. ... > I don't have any special reference, ... I did a bunch of reading on quaternions. ...
    (microsoft.public.win32.programmer.directx.managed)
  • Re: Quaternions -
    ... If I read well then you address two separate subjects: the mathematical problem of changing from quaternions to Euler angles; the simulation of the actual control of an aircraft. ... To be specific, around 1993, 1994 I discovered a way to reduce the gimbal lock singularities in Euler angles for aircraft attitudes to just one at a time. ...
    (sci.math)
  • Re: Quaternions vs. Euler Angles
    ... difficulties using quats instead of Euler angles. ... One was simulation of FAGOT antitank missile, with "fly" time cca 10-12 s, integration period 2ms. ... You should be aware that using quaternions, you are no more dealing with ODE's but DAE's. ... I've done hand calculations so I know that I implemented the appropriate ...
    (comp.simulation)
  • Re: Averaging quaternions
    ... recommended to interpret the camera orientation (and position ... relative merits of quaternions versus matrices, euler angles, etc., seems ... utility of Matrices, Euler Angles, and Quaternions. ...
    (comp.graphics.algorithms)