This is a helpful introductory paper on the topic: http://journals.iucr.org/d/issues/2001/10/00/ba5006/ba5006.pdf
-- David On 27 March 2014 06:11, Qixu Cai <caiq...@gmail.com> wrote: > Dear all, > > From the definition of CCP4 (http://www.ccp4.ac.uk/html/ > rotationmatrices.html), the polar angle (ϕ, ω, κ) can be visualised as > rotation ϕ about Z, rotation ω about the new Y, rotation κ about the new Z. > It seems the same as the ZXZ convention of eulerian angle definition. > What's the difference between the CCP4 polar angle definition and eulerian > angle ZXZ definition? > > And what's the definition of polar angle XYK convention in GLRF program? > > Thank you very much! > > Best wishes, > > -- > Qixu Cai > Email: caiq...@gmail.com > School of Life Sciences, > Xiamen University, Fujian, China > **from thunderbird** >