/*********************************************************************
Box -- Define bounding and overlapping boxes.
This is part of GNU Astronomy Utilities (Gnuastro) package.

Original author:
     Mohammad Akhlaghi <mohammad@akhlaghi.org>
Contributing author(s):
Copyright (C) 2015-2020, Free Software Foundation, Inc.

Gnuastro is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at your
option) any later version.

Gnuastro is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with Gnuastro. If not, see <http://www.gnu.org/licenses/>.
**********************************************************************/
#ifndef __GAL_BOX_H__
#define __GAL_BOX_H__

/* Include other headers if necessary here. Note that other header files
   must be included before the C++ preparations below */



/* C++ Preparations */
#undef __BEGIN_C_DECLS
#undef __END_C_DECLS
#ifdef __cplusplus
# define __BEGIN_C_DECLS extern "C" {
# define __END_C_DECLS }
#else
# define __BEGIN_C_DECLS                /* empty */
# define __END_C_DECLS                  /* empty */
#endif
/* End of C++ preparations */



/* Actual header contants (the above were for the Pre-processor). */
__BEGIN_C_DECLS  /* From C++ preparations */



/*                        IMPORTANT NOTE:
         All the axises are based on the FITS standard, NOT C.
*/

void
gal_box_bound_ellipse_extent(double a, double b, double theta_deg,
                             double *extent);

void
gal_box_bound_ellipse(double a, double b, double theta_deg, long *width);

void
gal_box_bound_ellipsoid_extent(double *semiaxes, double *euler_deg,
                              double *extent);

void
gal_box_bound_ellipsoid(double *semiaxes, double *euler_deg, long *width);

void
gal_box_border_from_center(double *center, size_t ndim, long *width,
                           long *fpixel, long *lpixel);

int
gal_box_overlap(long *naxes, long *fpixel_i, long *lpixel_i,
                long *fpixel_o, long *lpixel_o, size_t ndim);



__END_C_DECLS    /* From C++ preparations */

#endif           /* __GAL_BOX_H__ */
