Hey Folks, The C++ codebase doesn't have much to do with LSL, so llEuler2Rot won't exactly help.
What you are looking for CJ are the helper functions for quaternions, maybe this one will help: const LLQuaternion& setEulerAngles(F32 roll, F32 pitch, F32 yaw); (form llquaternion<https://bitbucket.org/lindenlab/viewer-release/src/24c6da14256c/indra/llmath/llquaternion.h#cl-83> ) - Nexii On Tue, Jul 31, 2012 at 1:38 PM, Sophira Crystal <sl-...@theblob.org> wrote: > Hi, > > To follow up on this... > > The easiest way to do what you want is to make a vector made up of > <roll, bearing, pitch> in degrees, multiply the vector by DEG_TO_RAD, > and then put it through llEuler2Rot. You should then have a good > rotation that you can pass to a function that needs it. > > Hope this helps! > > - Sophie. > > On Tue, Jul 31, 2012 at 1:29 PM, Sophira Crystal <sl-...@theblob.org> > wrote: > > Hi, > > > > You don't convert degrees to quaternions directly. You convert vectors > > to rotations (which are quarternions), and you do that with the > > llEuler2Rot function. > > > > As for the rest of your query, you might find > > http://wiki.secondlife.com/wiki/Rotation helpful - I don't know much > > about rotations, but I bet the answer you want is probably in there > > somewhere. > > > > I hope my reply's been helpful, even though I personally don't know > much... > > > > - Sophie. > > > > On Tue, Jul 31, 2012 at 11:54 AM, CJ Davies <cjohndav...@gmail.com> > wrote: > >> I've been struggling with this for 2 days now & am no closer to working > >> it out (despite investigating all sorts of examples online, including > >> the SL wiki). > >> > >> I have a accelerometer/magnetometer that tells me orientation via > >> compass bearing, pitch & roll. All of these are in degrees which can > >> easily be converted to radians via foo*DEG_TO_RAD. I want to plug these > >> values into llcoordframe methods to control where the camera points. All > >> of the llcoordframe stuff works in quaternions & I can't for the life of > >> me convert properly. > >> > >> I've just tried following this approach --> > >> > http://www.euclideanspace.com/maths/geometry/rotations/conversions/eulerToQuaternion/index.htm > >> > >> But this results in output like this --> http://paste2.org/p/2089138 > >> > >> Note how the calculated w/x/y/z values change drastically with tiny > >> changes in the bearing/pitch/roll, eg between lines 43 & 50 (the > >> accelerometer/magnetometer was motionless on the desk at the time!). > >> > >> Any help greatly appreciated. > >> > >> Regards, > >> CJ Davies > >> _______________________________________________ > >> Policies and (un)subscribe information available here: > >> http://wiki.secondlife.com/wiki/OpenSource-Dev > >> Please read the policies before posting to keep unmoderated posting > privileges > _______________________________________________ > Policies and (un)subscribe information available here: > http://wiki.secondlife.com/wiki/OpenSource-Dev > Please read the policies before posting to keep unmoderated posting > privileges >
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