"Hubert Holin" wrote
Janek Kozicki <janek_listy <at> wp.pl> writes:
Following functions would be needed:
operator*(vector<3,T1>,quaternion<T2>) // most important from_rotation_matrix(matrix<3,3,T>) to_rotation_matrix() from_axis_angle(vector<3,T1> axis, T2 angle) to_axis_angle() to_euler_angles()
and few others. Similar functionality is already in boost vault: directory "Math - Numerics", file Quaternion.h
Without quaternion rotations this linear algebra library would be pretty useless for me, so I hope it'll be there :)
Paris (U.E.), le 13/07/2006
Bonjour
If there is a reasonably standard (algebra, geometry) library to interface the quaternions with, I will provide the necessary functions.
Speaking of the quaternion (and octonion) library, there are quite a few things which have been on my to-do list for quite some time now (like support for serialization) which I hope I will finaly have some time to work on this summer.
Is there any chance of writing some sort of quaternions for dummies documentation? Basically I am the dummy when it comes to maths , unless I have some job to perform like getting point x and rotating it about axis a through angle b. Unfortunately the higher level stuff is putting the quaternion library out of my reach. I think my only use for quaternions is for rotation. My basic use case (maybe like Janek) would be 1) some way to construct the quaternion from (say) an axis angle representation of the rotation 2) some way to apply it to a 3D point. I hope that I could then make use of the library without needing to know all the maths. BTW my plan is also to make a quaternion that is compatible with my Quan library: http://quan.sourceforge.net/index.html I did some test on complex quantities in a previous incarnation of Quan and there seemed to be no problems, so for instance one could do typedef complex<resistance> impedance; complex<voltage> v; complex<current> i impedance z = v / i; This is of course an entirely practical example. I guess that the same thing could be applied in 3D, though I don't know if there is such a practical use, though there may well be. Anyway these are the sorts of things I would like to try to do with a quaternion. regards Andy Little