New subject: IMP-dev Digest, Vol 16, Issue 5

3 Feb 2009


      I would suggest something similar to what I have in
em/include/EulerOperations.h, if you find it useful.
> Given we already have rotation from_fixed_xyz which is a form of euler
> angles, this function should probably have a more descriptive name
> describing which Euler angles it uses.
>
>
> On Feb 2, 2009, at 10:10 PM, Notification of IMP commits wrote:
>
> > Author: kerenl@SALILAB.ORG
> > Date: 2009-02-02 22:10:39 -0800 (Mon, 02 Feb 2009)
> > New Revision: 1414
> >
> > Modified:
> >   trunk/modules/algebra/include/Rotation3D.h
> > Log:
> > add rotation_from_euler
> >
> > Modified: trunk/modules/algebra/include/Rotation3D.h
> > ===================================================================
> > --- trunk/modules/algebra/include/Rotation3D.h        2009-02-03 03:11:05
> > UTC (rev 1413)
> > +++ trunk/modules/algebra/include/Rotation3D.h        2009-02-03 06:10:39
> > UTC (rev 1414)
> > @@ -114,6 +114,24 @@
> >   return Rotation3D(a,b,c,d);
> > }
> >
> > +//! Initialize a rotation from euler angles
> > +/**
> > +   \note http://en.wikipedia.org/wiki/
> > +         Conversion_between_quaternions_and_Euler_angles
> > +    \relates Rotation3D
> > +*/
> > +inline Rotation3D rotation_from_euler(Float phi, Float theta, Float
> > psi)
> > +{
> > +  Float a,b,c,d;
> > +  Float c1,c2,c3,s1,s2,s3;
> > +  c2=cos(theta/2);c1=cos(phi/2);c3=cos(psi/2);
> > +  s2=sin(theta/2);s1=sin(phi/2);s3=sin(psi/2);
> > +  a = c1*c2*c3+s1*s2*s3;
> > +  b = s1*c2*c3-c1*s2*s3;
> > +  c = c1*s2*c3+s1*c2*s3;
> > +  d = c1*c2*s3-s1*s2*c3;
> > +  return Rotation3D(a,b,c,d);
> > +}
> > //! Generate a Rotation3D object from a rotation matrix
> > /**
> >    \throw ValueException if the rotation is not a rotation matrix.
> >
> > _______________________________________________
> > IMP-commits mailing list
> > IMP-commits@salilab.org
> > https://salilab.org/mailman/listinfo/imp-commits
>
>

Re: [IMP-dev] IMP-dev Digest, Vol 16, Issue 5