/*
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 */

#pragma once

/** \file
 * \ingroup bli
 */

#ifdef __cplusplus
extern "C" {
#endif

/** Calculate the index number of a voxel, given x/y/z integer coords and resolution vector. */
#define BLI_VOXEL_INDEX(x, y, z, res) \
  ((int64_t)(x) + (int64_t)(y) * (int64_t)(res)[0] + \
   (int64_t)(z) * (int64_t)(res)[0] * (int64_t)(res)[1])

/* All input coordinates must be in bounding box 0.0 - 1.0. */

float BLI_voxel_sample_nearest(const float *data, const int res[3], const float co[3]);
float BLI_voxel_sample_trilinear(const float *data, const int res[3], const float co[3]);
float BLI_voxel_sample_triquadratic(const float *data, const int res[3], const float co[3]);
float BLI_voxel_sample_tricubic(const float *data,
                                const int res[3],
                                const float co[3],
                                int bspline);

#ifdef __cplusplus
}
#endif