trick/trick_source/trick_utils/math/src/dvxv_add.c

/*
   PURPOSE: (Vector cross product addition)
   ASSUMPTIONS AND LIMITATIONS: ((3x1 vector implementation))
   PROGRAMMERS: (((Les Quiocho) (NASA/JSC) (Jan 1990) (v1.0) (Init Release)))
 */

#include "trick/trick_math.h"

void dvxv_add(double sum[],     /* Out: Sum of cross product and sum */
              double vect1[],   /* In: Vector1 */
              double vect2[])
{                                      /* In: Vector2 */
    sum[0] += ((vect1[1] * vect2[2]) - (vect1[2] * vect2[1]));
    sum[1] += ((vect1[2] * vect2[0]) - (vect1[0] * vect2[2]));
    sum[2] += ((vect1[0] * vect2[1]) - (vect1[1] * vect2[0]));

    return;
}