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/*
* 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) 2018 by Blender Foundation.
* All rights reserved.
*/
/** \file \ingroup bke
*/
#ifndef __MULTIRES_INLINE_H__
#define __MULTIRES_INLINE_H__
#include "BKE_multires.h"
#include "BLI_math_vector.h"
BLI_INLINE void BKE_multires_construct_tangent_matrix(
float tangent_matrix[3][3],
const float dPdu[3],
const float dPdv[3],
const int corner)
{
if (corner == 0) {
copy_v3_v3(tangent_matrix[0], dPdv);
copy_v3_v3(tangent_matrix[1], dPdu);
mul_v3_fl(tangent_matrix[0], -1.0f);
mul_v3_fl(tangent_matrix[1], -1.0f);
}
else if (corner == 1) {
copy_v3_v3(tangent_matrix[0], dPdu);
copy_v3_v3(tangent_matrix[1], dPdv);
mul_v3_fl(tangent_matrix[1], -1.0f);
}
else if (corner == 2) {
copy_v3_v3(tangent_matrix[0], dPdv);
copy_v3_v3(tangent_matrix[1], dPdu);
}
else if (corner == 3) {
copy_v3_v3(tangent_matrix[0], dPdu);
copy_v3_v3(tangent_matrix[1], dPdv);
mul_v3_fl(tangent_matrix[0], -1.0f);
}
cross_v3_v3v3(tangent_matrix[2], dPdu, dPdv);
normalize_v3(tangent_matrix[0]);
normalize_v3(tangent_matrix[1]);
normalize_v3(tangent_matrix[2]);
}
#endif /* __MULTIRES_INLINE_H__ */
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