I forgot to mention that I think the only fail-safe direct approach
will involve converting both rotations into quaternions,
"subtracting" (inv(A)*B) said quaternions, then converting the
difference into an axis-angle pair.
James
On Feb 3, 2009, at 9:47 AM, Francis E Reyes wrote:
I have trouble with visualizing things in three dimensions so I'm
trying to figure out the relationship between two cross rotation
functions (given as theta1, theta2, theta3).
Is there a program or webapp that'll tell me whether two rotation
solutions are related by a 180/90/60/whathaveyou axis?
e.g.
The space group is P4(1)
The top few cross rotation solutions are:
! index, theta1, theta2, theta3, RF-function (EPSIlon= 0.25)
1 173.333 2.630 186.481 0.0907
3 353.426 180.000 353.426 0.0879
7 98.807 147.925 67.347 0.0608
8 279.440 30.322 292.587 0.0602
10 292.696 168.784 294.156 0.0562
12 233.216 30.322 246.364 0.0511
Is index 1,3 related how about 7,8?? What is the relationship
between the pair 1,3 and 7,8 ?
Thanks
FR
---------------------------------------------
Francis Reyes M.Sc.
215 UCB
University of Colorado at Boulder
gpg --keyserver pgp.mit.edu --recv-keys 67BA8D5D
8AE2 F2F4 90F7 9640 28BC 686F 78FD 6669 67BA 8D5D
