81 lines
2.0 KiB
C++
81 lines
2.0 KiB
C++
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2018 by Blender Foundation.
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* All rights reserved.
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*
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* Contributor(s): Sergey Sharybin.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file blender/blenkernel/intern/subdiv_inline.h
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* \ingroup bke
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*/
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#ifndef __SUBDIV_INLINE_H__
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#define __SUBDIV_INLINE_H__
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#include "BLI_assert.h"
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#include "BLI_compiler_compat.h"
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#include "BKE_subdiv.h"
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BLI_INLINE void BKE_subdiv_ptex_face_uv_to_grid_uv(
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const float ptex_u, const float ptex_v,
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float *r_grid_u, float *r_grid_v)
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{
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*r_grid_u = 1.0f - ptex_v;
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*r_grid_v = 1.0f - ptex_u;
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}
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BLI_INLINE int BKE_subdiv_grid_size_from_level(const int level)
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{
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return (1 << (level - 1)) + 1;
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}
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BLI_INLINE int BKE_subdiv_rotate_quad_to_corner(
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const float u, const float v,
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float *r_u, float *r_v)
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{
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int corner;
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if (u <= 0.5f && v <= 0.5f) {
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corner = 0;
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*r_u = 2.0f * u;
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*r_v = 2.0f * v;
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}
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else if (u > 0.5f && v <= 0.5f) {
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corner = 1;
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*r_u = 2.0f * v;
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*r_v = 2.0f * (1.0f - u);
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}
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else if (u > 0.5f && v > 0.5f) {
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corner = 2;
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*r_u = 2.0f * (1.0f - u);
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*r_v = 2.0f * (1.0f - v);
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}
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else {
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BLI_assert(u <= 0.5f && v >= 0.5f);
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corner = 3;
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*r_u = 2.0f * (1.0f - v);
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*r_v = 2.0f * u;
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}
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return corner;
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}
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#endif /* __SUBDIV_INLINE_H__ */
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