Wow, big response. Thanks for all the help. I'll let you all know how it goes. Thanks, Brad --- Brad Colbert Renaissance Sciences Corporation W: 480 290-3997 F: 425 675-8044
________________________________ From: [EMAIL PROTECTED] on behalf of Paul Speed Sent: Wed 4/4/2007 2:25 PM To: osg users Subject: Re: [osg-users] How do I retrieve the Heading, Pitch, and Roll froma quat? A google of "quaternion to euler" yielded this as the first link: http://www.euclideanspace.com/maths/geometry/rotations/conversions/quaternionToEuler/index.htm Looks right to me on first inspection. I think from OSG's perspective the issue is that yaw/pitch/roll aren't particular useful in the context of a quaternion. They are ambiguous at best and misleading at worst since it is very order dependent, ie: is it yaw+pitch+roll or is it roll+pitch+yaw. It is very useful information to display to the user but not very useful otherwise. -Paul Gordon Tomlinson wrote: > Sadly OSG for some reason does not provide this:( thats a win for Vega > Prime it does provide it :) > > You have to extract it either from a matrix or the Quat which is not > that straight forward to do > > One trick that helps is to make sure your Quat's and matrices are > always created the same way > > But it is doable to extract the info in a reliable method > > I have a solution that works pretty well at work but unfortunately I'm > not at liberty to distribute it publicly (sorry) > > If your search the net you can find solutions that will help get you > there with some tweaking > > > > /Best Regards / > > // > > /Gordon/ > > __________________________________________________________ > /Gordon Tomlinson > //Email / : gordon.tomlinson @ overwatch.com/ > YIM/AIM/: Gordon3dBrit > /MSN IM /: Gordon3dBrit @ 3dSceneGraph.com > > __________________________________________________________ > //Telephone (Cell)//:/ (+1) 214-477-8914 > Telephone (Work)//:/ //(+1) 703-437-7651// > > "Self defence is not a function of learning tricks > but is a function of how quickly and intensely one > can arouse one's instinct for survival" > - */Master Tambo Tetsura/* > > -----Original Message----- > *From:* [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of *Brad Colbert > *Sent:* Wednesday, April 04, 2007 5:02 PM > *To:* [email protected] > *Subject:* [osg-users] How do I retrieve the Heading, Pitch,and Roll > from a quat? > > Hi folks, > > I polked around and couldn't find the answer for this. How does one > retrieve the heading, pitch, and roll angle from a quat for display? > > Thanks, > Brad > > --- > Brad Colbert > Renaissance Sciences Corporation > W: 480 290-3997 > F: 425 675-8044 > > > ------------------------------------------------------------------------ > > _______________________________________________ > osg-users mailing list > [email protected] > http://openscenegraph.net/mailman/listinfo/osg-users > http://www.openscenegraph.org/ _______________________________________________ osg-users mailing list [email protected] http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
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