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48 lines
1.4 KiB
Fortran
48 lines
1.4 KiB
Fortran
DOUBLE PRECISION FUNCTION sla_DRANRM (ANGLE)
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*+
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* - - - - - - -
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* D R A N R M
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* - - - - - - -
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*
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* Normalize angle into range 0-2 pi (double precision)
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*
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* Given:
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* ANGLE dp the angle in radians
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*
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* The result is ANGLE expressed in the range 0-2 pi.
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*
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* Last revision: 22 July 2004
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*
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* Copyright P.T.Wallace. All rights reserved.
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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 ANGLE
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DOUBLE PRECISION D2PI
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PARAMETER (D2PI=6.283185307179586476925286766559D0)
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sla_DRANRM = MOD(ANGLE,D2PI)
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IF (sla_DRANRM.LT.0D0) sla_DRANRM = sla_DRANRM+D2PI
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END
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