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diff --git a/math/slalib/doc/dav2m.hlp b/math/slalib/doc/dav2m.hlp new file mode 100644 index 00000000..26d5fae6 --- /dev/null +++ b/math/slalib/doc/dav2m.hlp @@ -0,0 +1,36 @@ +.help dav2m Jun99 "Slalib Package" +.nf + + SUBROUTINE slDAVM (AXVEC, RMAT) + + - - - - - - + D A V M + - - - - - - + + Form the rotation matrix corresponding to a given axial vector. + (double precision) + + 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. + + Given: + AXVEC d(3) axial vector (radians) + + Returned: + RMAT d(3,3) rotation matrix + + If AXVEC is null, the unit matrix is returned. + + The reference frame rotates clockwise as seen looking along + the axial vector from the origin. + + P.T.Wallace Starlink June 1989 + + Copyright (C) 1995 Rutherford Appleton Laboratory + Copyright (C) 1995 Association of Universities for Research in Astronomy Inc. + +.fi +.endhelp |