/usr/share/octave/packages/geometry-1.7.0/geom3d/angles3d.m is in octave-geometry 1.7.0-1build1.
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## Copyright (C) 2004-2011 INRA - CEPIA Nantes - MIAJ (Jouy-en-Josas)
## Copyright (C) 2012 Adapted to Octave by Juan Pablo Carbajal <carbajal@ifi.uzh.ch>
## All rights reserved.
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are met:
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## -*- texinfo -*-
## @deftypefn {Function File} angles3d ()
##ANGLES3D Conventions for manipulating angles in 3D
##
## Contrary to the plane, there are no oriented angles in 3D. Angles
## between lines or between planes are comprised between 0 and PI.
##
## Spherical angles
## Spherical angles are defined by 2 angles:
## * THETA, the colatitude, representing angle with Oz axis (between 0 and
## PI)
## * PHI, the azimut, representing angle with Ox axis of horizontal
## projection of the direction (between 0 and 2*PI)
##
## Spherical coordinates can be represented by THETA, PHI, and the
## distance RHO to the origin.
##
## Euler angles
## Some functions for creating rotations use Euler angles. They follow the
## ZYX convention in the global reference system, that is eqivalent to the
## XYZ convention ine a local reference system.
## Euler angles are given by a triplet of angles [PHI THETA PSI] that
## represents the succession of 3 rotations:
## * rotation around X by angle PSI ("roll")
## * rotation around Y by angle THETA ("pitch")
## * rotation around Z by angle PHI ("yaw")
##
## In this library, euler angles are given in degrees. The functions that
## use euler angles use the keyword 'Euler' in their name.
##
##
## @seealso{cart2sph2, sph2cart2, cart2sph2d, sph2cart2d
## anglePoints3d, angleSort3d, sphericalAngle, randomAngle3d
## dihedralAngle, polygon3dNormalAngle, eulerAnglesToRotation3d
## rotation3dAxisAndAngle, rotation3dToEulerAngles}
## @end deftypefn
function angles3d()
help angles3d
endfunction
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