#include "structs.h"
#include "const.h"

void calc_rotpars (float a[], struct fitpars *r, struct rotpars *rp)
{
    rp->xc = a[1];
    rp->yc = a[2];

    rp->cosPA = cos (a[10]);
    rp->sinPA = sin (a[10]);

    if (r != NULL) {
        rotrp = -r->a[3] / 360. * PI;
        rp->cosi = cos (r->a[9] / 180. * PI);
        rp->sini = sin (r->a[9] / 180. * PI);
        rp->cosskypa = cos (-r->a[10]/180. * PI);
        rp->sinskypa = sin (-r->a[10]/180. * PI);
    };
};