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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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.
*
* Contributor(s): Sergey Sharybin.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/blenkernel/intern/subdiv_inline.h
* \ingroup bke
*/
#ifndef __SUBDIV_INLINE_H__
#define __SUBDIV_INLINE_H__
#include "BLI_assert.h"
#include "BLI_compiler_compat.h"
#include "BKE_subdiv.h"
BLI_INLINE void BKE_subdiv_ptex_face_uv_to_grid_uv(
const float ptex_u, const float ptex_v,
float *r_grid_u, float *r_grid_v)
{
*r_grid_u = 1.0f - ptex_v;
*r_grid_v = 1.0f - ptex_u;
}
BLI_INLINE int BKE_subdiv_grid_size_from_level(const int level)
{
return (1 << (level - 1)) + 1;
}
BLI_INLINE int BKE_subdiv_rotate_quad_to_corner(
const float u, const float v,
float *r_u, float *r_v)
{
int corner;
if (u <= 0.5f && v <= 0.5f) {
corner = 0;
*r_u = 2.0f * u;
*r_v = 2.0f * v;
}
else if (u > 0.5f && v <= 0.5f) {
corner = 1;
*r_u = 2.0f * v;
*r_v = 2.0f * (1.0f - u);
}
else if (u > 0.5f && v > 0.5f) {
corner = 2;
*r_u = 2.0f * (1.0f - u);
*r_v = 2.0f * (1.0f - v);
}
else {
BLI_assert(u <= 0.5f && v >= 0.5f);
corner = 3;
*r_u = 2.0f * (1.0f - v);
*r_v = 2.0f * u;
}
return corner;
}
#endif /* __SUBDIV_INLINE_H__ */
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