star-sf

Set of surface and volume scattering functions
git clone git://git.meso-star.fr/star-sf.git
Log | Files | Refs | README | LICENSE

test_ssf_beckmann_distribution.c (2593B)

      1 /* Copyright (C) 2016-2018, 2021-2025 |Méso|Star> (contact@meso-star.com)
      2  *
      3  * This program is free software: you can redistribute it and/or modify
      4  * it under the terms of the GNU General Public License as published by
      5  * the Free Software Foundation, either version 3 of the License, or
      6  * (at your option) any later version.
      7  *
      8  * This program is distributed in the hope that it will be useful,
      9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
     11  * GNU General Public License for more details.
     12  *
     13  * You should have received a copy of the GNU General Public License
     14  * along with this program. If not, see <http://www.gnu.org/licenses/>. */
     15 
     16 #define _POSIX_C_SOURCE 200112L /* nextafter support */
     17 
     18 #include "ssf.h"
     19 #include "test_ssf_utils.h"
     20 
     21 #include <math.h>
     22 
     23 int
     24 main(int argc, char** argv)
     25 {
     26   struct mem_allocator allocator;
     27   struct ssf_microfacet_distribution* distrib;
     28   struct ssf_microfacet_distribution* dummy;
     29   struct ssp_rng* rng;
     30   const size_t NTESTS = 10;
     31   size_t itest;
     32   (void)argc, (void)argv;
     33 
     34   mem_init_proxy_allocator(&allocator, &mem_default_allocator);
     35 
     36   CHK(ssp_rng_create(&allocator, SSP_RNG_THREEFRY, &rng) == RES_OK);
     37 
     38   CHK(ssf_microfacet_distribution_create
     39     (&allocator, &ssf_beckmann_distribution, &distrib) == RES_OK);
     40   CHK(ssf_microfacet_distribution_create
     41     (&allocator, &microfacet_dummy, &dummy) == RES_OK);
     42 
     43   CHK(ssf_beckmann_distribution_setup(NULL, -1) == RES_BAD_ARG);
     44   CHK(ssf_beckmann_distribution_setup(distrib, -1) == RES_BAD_ARG);
     45   CHK(ssf_beckmann_distribution_setup(NULL, 0.5) == RES_BAD_ARG);
     46   CHK(ssf_beckmann_distribution_setup(distrib, 0.5) == RES_OK);
     47   CHK(ssf_beckmann_distribution_setup(dummy, 0.5) == RES_BAD_ARG);
     48 
     49   CHK(ssf_beckmann_distribution_setup(distrib, 1) == RES_OK);
     50   CHK(ssf_beckmann_distribution_setup(distrib, nextafter(0, 1)) == RES_OK);
     51   CHK(ssf_beckmann_distribution_setup(distrib, nextafter(1, 2)) == RES_BAD_ARG);
     52   CHK(ssf_beckmann_distribution_setup(distrib, 0) == RES_BAD_ARG);
     53 
     54   FOR_EACH(itest, 0, NTESTS) {
     55     const double roughness = nextafter(ssp_rng_canonical(rng), 2); /*in ]0, 1]*/
     56     CHK(ssf_beckmann_distribution_setup(distrib, roughness) == RES_OK);
     57     check_microfacet_distribution(distrib, rng);
     58   }
     59 
     60   CHK(ssf_microfacet_distribution_ref_put(distrib) == RES_OK);
     61   CHK(ssf_microfacet_distribution_ref_put(dummy) == RES_OK);
     62   CHK(ssp_rng_ref_put(rng) == RES_OK);
     63 
     64   check_memory_allocator(&allocator);
     65   mem_shutdown_proxy_allocator(&allocator);
     66   CHK(mem_allocated_size() == 0);
     67   return 0;
     68 }