/* vminus.f -- translated by f2c (version 19980913).
   You must link the resulting object file with the libraries:
	-lf2c -lm   (in that order)
*/

#include "f2c.h"

/* $Procedure      VMINUS ( Minus V, "-V", 3 dimensions ) */
/* Subroutine */ int vminus_(doublereal *v1, doublereal *vout)
{
/* $ Abstract */

/*      Negate a double precision 3-dimensional vector. */

/* $ Disclaimer */

/*     THIS SOFTWARE AND ANY RELATED MATERIALS WERE CREATED BY THE */
/*     CALIFORNIA INSTITUTE OF TECHNOLOGY (CALTECH) UNDER A U.S. */
/*     GOVERNMENT CONTRACT WITH THE NATIONAL AERONAUTICS AND SPACE */
/*     ADMINISTRATION (NASA). THE SOFTWARE IS TECHNOLOGY AND SOFTWARE */
/*     PUBLICLY AVAILABLE UNDER U.S. EXPORT LAWS AND IS PROVIDED "AS-IS" */
/*     TO THE RECIPIENT WITHOUT WARRANTY OF ANY KIND, INCLUDING ANY */
/*     WARRANTIES OF PERFORMANCE OR MERCHANTABILITY OR FITNESS FOR A */
/*     PARTICULAR USE OR PURPOSE (AS SET FORTH IN UNITED STATES UCC */
/*     SECTIONS 2312-2313) OR FOR ANY PURPOSE WHATSOEVER, FOR THE */
/*     SOFTWARE AND RELATED MATERIALS, HOWEVER USED. */

/*     IN NO EVENT SHALL CALTECH, ITS JET PROPULSION LABORATORY, OR NASA */
/*     BE LIABLE FOR ANY DAMAGES AND/OR COSTS, INCLUDING, BUT NOT */
/*     LIMITED TO, INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND, */
/*     INCLUDING ECONOMIC DAMAGE OR INJURY TO PROPERTY AND LOST PROFITS, */
/*     REGARDLESS OF WHETHER CALTECH, JPL, OR NASA BE ADVISED, HAVE */
/*     REASON TO KNOW, OR, IN FACT, SHALL KNOW OF THE POSSIBILITY. */

/*     RECIPIENT BEARS ALL RISK RELATING TO QUALITY AND PERFORMANCE OF */
/*     THE SOFTWARE AND ANY RELATED MATERIALS, AND AGREES TO INDEMNIFY */
/*     CALTECH AND NASA FOR ALL THIRD-PARTY CLAIMS RESULTING FROM THE */
/*     ACTIONS OF RECIPIENT IN THE USE OF THE SOFTWARE. */

/* $ Required_Reading */

/*     None. */

/* $ Keywords */

/*      VECTOR */

/* $ Declarations */
/* $ Brief_I/O */

/*      VARIABLE  I/O  DESCRIPTION */
/*      --------  ---  -------------------------------------------------- */
/*       V1        I     Vector to be negated. */
/*       VOUT      O     Negated vector -V1. VOUT can overwrite V1. */


/* $ Detailed_Input */

/*      V1      This may be any 3-dimensional, double precision vector. */

/* $ Detailed_Output */

/*      VOUT    This will be the negation (additive inverse) of V1.  It */
/*              is a 3-dimensional, double precision vector.  VOUT may */
/*              overwrite V1. */

/* $ Parameters */

/*     None. */

/* $ Particulars */

/*      VMINUS implements (by components) the expression VMINUS = -V1. */
/*      No error checking is performed since overflow can occur ONLY if */
/*      the dynamic range of positive floating point numbers is not the */
/*      same size as the dynamic range of negative floating point */
/*      numbers AND at least one component of V1 falls outside the */
/*      common range.  The likelihood of this occuring is so small as to */
/*      be of no concern. */

/* $ Examples */

/*      The following table shows the output VOUT as a function of the */
/*      the input V1 from the subroutine VMINUS. */

/*      V1                     VOUT */
/*      ------------------------------------------------------- */
/*      (1D0, -2D0, 0D0)       (-1D0, 2D0, 0D0) */
/*      (0D0, 0D0, 0D0)        (0D0, 0D0, 0D0) */

/* $ Restrictions */

/*      None. */

/* $ Exceptions */

/*      Error free. */

/* $ Files */

/*      None. */

/* $ Author_and_Institution */

/*      W.M. Owen       (JPL) */

/* $ Literature_References */

/*      None. */

/* $ Version */

/* -     SPICELIB Version 1.0.1, 10-MAR-1992 (WLT) */

/*         Comment section for permuted index source lines was added */
/*         following the header. */

/* -     SPICELIB Version 1.0.0, 31-JAN-1990 (WMO) */

/* -& */
/* $ Index_Entries */

/*     negate a 3-dimensional vector */

/* -& */
    vout[0] = -v1[0];
    vout[1] = -v1[1];
    vout[2] = -v1[2];

    return 0;
} /* vminus_ */

