63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "BKE_multires.h"
|
|
#include "BLI_math_vector.h"
|
|
#include "BLI_utildefines.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);
|
|
}
|
|
else {
|
|
BLI_assert_msg(0, "Unhandled corner index");
|
|
}
|
|
cross_v3_v3v3(tangent_matrix[2], dPdu, dPdv);
|
|
normalize_v3(tangent_matrix[0]);
|
|
normalize_v3(tangent_matrix[1]);
|
|
normalize_v3(tangent_matrix[2]);
|
|
}
|