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45 lines
1.3 KiB
Fortran
45 lines
1.3 KiB
Fortran
DOUBLE PRECISION FUNCTION sla_DVDV (VA, VB)
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*+
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* - - - - -
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* D V D V
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* - - - - -
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*
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* Scalar product of two 3-vectors (double precision)
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*
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* Given:
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* VA dp(3) first vector
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* VB dp(3) second vector
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*
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* The result is the scalar product VA.VB (double precision)
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*
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* P.T.Wallace Starlink November 1984
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*
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* Copyright (C) 1995 Rutherford Appleton Laboratory
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*
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* License:
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (see SLA_CONDITIONS); if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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*-
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IMPLICIT NONE
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DOUBLE PRECISION VA(3),VB(3)
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sla_DVDV=VA(1)*VB(1)+VA(2)*VB(2)+VA(3)*VB(3)
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END
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