From d54fe7c1f704a63824c5bfa0ece65245572e9b27 Mon Sep 17 00:00:00 2001 From: Joseph Hunkeler Date: Wed, 4 Mar 2015 21:21:30 -0500 Subject: Initial commit --- src/slalib/sun67.htx/node45.html | 103 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 103 insertions(+) create mode 100644 src/slalib/sun67.htx/node45.html (limited to 'src/slalib/sun67.htx/node45.html') diff --git a/src/slalib/sun67.htx/node45.html b/src/slalib/sun67.htx/node45.html new file mode 100644 index 0000000..4e11c46 --- /dev/null +++ b/src/slalib/sun67.htx/node45.html @@ -0,0 +1,103 @@ + + + + +SLA_DAV2M - Rotation Matrix from Axial Vector + + + + + + + + + + + + +
+ +next + +up + +previous +
+ Next: SLA_DBEAR - Direction Between Points on a Sphere +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_DAT - TAI-UTC +

+

+

SLA_DAV2M - Rotation Matrix from Axial Vector +   +

+
+
ACTION: +
Form the rotation matrix corresponding to a given axial vector +(double precision). +

CALL: +
CALL sla_DAV2M (AXVEC, RMAT) +

+

+
GIVEN: +
+
+ + + + + +
AXVECD(3)axial vector (radians)
+

+
RETURNED: +
+
+ + + + + +
RMATD(3,3)rotation matrix
+

+
NOTES: +
+
1. +
A rotation matrix describes a rotation about some arbitrary axis. +The axis is called the Euler axis, and the angle through which the +reference frame rotates is called the Euler angle. The axial + vector supplied to this routine has the same direction as the + Euler axis, and its magnitude is the Euler angle in radians. +
2. +
If AXVEC is null, the unit matrix is returned. +
3. +
The reference frame rotates clockwise as seen looking along + the axial vector from the origin. +
+
+ +next + +up + +previous +
+ Next: SLA_DBEAR - Direction Between Points on a Sphere +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_DAT - TAI-UTC +

+

+

+SLALIB --- Positional Astronomy Library
Starlink User Note 67
P. T. Wallace
12 October 1999
E-mail:ptw@star.rl.ac.uk +
+ + -- cgit