From d54fe7c1f704a63824c5bfa0ece65245572e9b27 Mon Sep 17 00:00:00 2001
From: Joseph Hunkeler <jhunkeler@gmail.com>
Date: Wed, 4 Mar 2015 21:21:30 -0500
Subject: Initial commit

---
 src/slalib/mxv.f | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 src/slalib/mxv.f

(limited to 'src/slalib/mxv.f')

diff --git a/src/slalib/mxv.f b/src/slalib/mxv.f
new file mode 100644
index 0000000..2935f72
--- /dev/null
+++ b/src/slalib/mxv.f
@@ -0,0 +1,47 @@
+      SUBROUTINE sla_MXV (RM, VA, VB)
+*+
+*     - - - -
+*      M X V
+*     - - - -
+*
+*  Performs the 3-D forward unitary transformation:
+*
+*     vector VB = matrix RM * vector VA
+*
+*  (single precision)
+*
+*  Given:
+*     RM       real(3,3)    matrix
+*     VA       real(3)      vector
+*
+*  Returned:
+*     VB       real(3)      result vector
+*
+*  P.T.Wallace   Starlink   March 1986
+*
+*  Copyright (C) 1995 Rutherford Appleton Laboratory
+*-
+
+      IMPLICIT NONE
+
+      REAL RM(3,3),VA(3),VB(3)
+
+      INTEGER I,J
+      REAL W,VW(3)
+
+
+*  Matrix RM * vector VA -> vector VW
+      DO J=1,3
+         W=0.0
+         DO I=1,3
+            W=W+RM(J,I)*VA(I)
+         END DO
+         VW(J)=W
+      END DO
+
+*  Vector VW -> vector VB
+      DO J=1,3
+         VB(J)=VW(J)
+      END DO
+
+      END
-- 
cgit