/usr/include/gnuastro/polygon.h is in libgnuastro-dev 0.5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | /*********************************************************************
Polygon related functions and macros.
This is part of GNU Astronomy Utilities (Gnuastro) package.
Original author:
Mohammad Akhlaghi <akhlaghi@gnu.org>
Contributing author(s):
Copyright (C) 2015, 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_POLYGON_H__
#define __GAL_POLYGON_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 */
#define GAL_POLYGON_MAX_CORNERS 50
#define GAL_POLYGON_ROUND_ERR 1e-5
/***************************************************************/
/************** Function declarations ******************/
/***************************************************************/
void
gal_polygon_ordered_corners(double *in, size_t n, size_t *ordinds);
double
gal_polygon_area(double *v, size_t n);
int
gal_polygon_pin(double *v, double *p, size_t n);
int
gal_polygon_ppropin(double *v, double *p, size_t n);
void
gal_polygon_clip(double *s, size_t n, double *c, size_t m,
double *o, size_t *numcrn);
__END_C_DECLS /* From C++ preparations */
#endif /* __GAL_POLYGON_H__ */
|