OOF2: The Manual
Name
Axis (Axis) — Axis and angle representation of a 3D rotation. The rotation brings the crystal axes into coincidence with the lab axes.
Synopsis
Axis
(angle
,x
,y
,z
)
Details
-
Base class:
Orientation
-
Parameters:
angle
- Rotation angle, in degrees. Type: A real number in the range [-180, 180].
x
- x component of rotation axis. Type: A real number.
y
- y component of rotation axis. Type: A real number.
z
- z component of rotation axis. Type: A real number.
Description
An Axis
object describes the orientation of
an object in three dimensional space, in terms of an axis
direction, and an angle of rotation about that axis. When used
for crystal orientation in OOF2, the indicated rotation brings
the crystalline
,
, and
axes into coincidence
with the laboratory (or screen) axies
,
, and
respectively. The components of the rotation axis itself are
preserved by the rotation, and so may be specified in either the
crystalline or the laboratory coordinate systems.
The x
, y
, and
z
parameters specify the rotation axis. The
axis passes through the origin and the point
.
The vector
does not have to be a unit vector.
The parameter angle
specifies the rotation
angle, in degrees.