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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 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 void BKE_subdiv_grid_uv_to_ptex_face_uv(
const float grid_u, const float grid_v,
float *r_ptex_u, float *r_ptex_v)
{
*r_ptex_u = 1.0f - grid_v;
*r_ptex_v = 1.0f - grid_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 quad_u, const float quad_v,
float *r_corner_u, float *r_corner_v)
{
int corner;
if (quad_u <= 0.5f && quad_v <= 0.5f) {
corner = 0;
*r_corner_u = 2.0f * quad_u;
*r_corner_v = 2.0f * quad_v;
}
else if (quad_u > 0.5f && quad_v <= 0.5f) {
corner = 1;
*r_corner_u = 2.0f * quad_v;
*r_corner_v = 2.0f * (1.0f - quad_u);
}
else if (quad_u > 0.5f && quad_v > 0.5f) {
corner = 2;
*r_corner_u = 2.0f * (1.0f - quad_u);
*r_corner_v = 2.0f * (1.0f - quad_v);
}
else {
BLI_assert(quad_u <= 0.5f && quad_v >= 0.5f);
corner = 3;
*r_corner_u = 2.0f * (1.0f - quad_v);
*r_corner_v = 2.0f * quad_u;
}
return corner;
}
BLI_INLINE void BKE_subdiv_rotate_grid_to_quad(
const int corner,
const float grid_u, const float grid_v,
float *r_quad_u, float *r_quad_v)
{
if (corner == 0) {
*r_quad_u = 0.5f - grid_v * 0.5f;
*r_quad_v = 0.5f - grid_u * 0.5f;
}
else if (corner == 1) {
*r_quad_u = 0.5f + grid_u * 0.5f;
*r_quad_v = 0.5f - grid_v * 0.5f;
}
else if (corner == 2) {
*r_quad_u = 0.5f + grid_v * 0.5f;
*r_quad_v = 0.5f + grid_u * 0.5f;
}
else {
BLI_assert(corner == 3);
*r_quad_u = 0.5f - grid_u * 0.5f;
*r_quad_v = 0.5f + grid_v * 0.5f;
}
}
#endif /* __SUBDIV_INLINE_H__ */
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