diff options
author | Sergey Sharybin <sergey.vfx@gmail.com> | 2018-09-04 16:26:58 +0300 |
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committer | Sergey Sharybin <sergey.vfx@gmail.com> | 2018-09-04 16:34:52 +0300 |
commit | 916edab639616001c04b091d00d30e65d033f332 (patch) | |
tree | a45485fa77c1be8525c6845f03fab968239b7835 /source/blender/blenkernel/BKE_subdiv_eval.h | |
parent | f1508cc8d56489d5ab024531beb6056470beb0a4 (diff) |
Subdiv: Move evaluation functionality to own header
Diffstat (limited to 'source/blender/blenkernel/BKE_subdiv_eval.h')
-rw-r--r-- | source/blender/blenkernel/BKE_subdiv_eval.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/source/blender/blenkernel/BKE_subdiv_eval.h b/source/blender/blenkernel/BKE_subdiv_eval.h new file mode 100644 index 00000000000..26c13643808 --- /dev/null +++ b/source/blender/blenkernel/BKE_subdiv_eval.h @@ -0,0 +1,127 @@ +/* + * ***** 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 BKE_subdiv_eval.h + * \ingroup bke + * \since July 2018 + * \author Sergey Sharybin + */ + +#ifndef __BKE_SUBDIV_EVAL_H__ +#define __BKE_SUBDIV_EVAL_H__ + +#include "BLI_sys_types.h" + +struct Mesh; +struct Subdiv; + +/* Returns true if evaluator is ready for use. */ +bool BKE_subdiv_eval_begin(struct Subdiv *subdiv); +bool BKE_subdiv_eval_update_from_mesh(struct Subdiv *subdiv, + const struct Mesh *mesh); + +/* Single point queries. */ + +void BKE_subdiv_eval_limit_point( + struct Subdiv *subdiv, + const int ptex_face_index, + const float u, const float v, + float r_P[3]); +void BKE_subdiv_eval_limit_point_and_derivatives( + struct Subdiv *subdiv, + const int ptex_face_index, + const float u, const float v, + float r_P[3], float r_dPdu[3], float r_dPdv[3]); +void BKE_subdiv_eval_limit_point_and_normal( + struct Subdiv *subdiv, + const int ptex_face_index, + const float u, const float v, + float r_P[3], float r_N[3]); +void BKE_subdiv_eval_limit_point_and_short_normal( + struct Subdiv *subdiv, + const int ptex_face_index, + const float u, const float v, + float r_P[3], short r_N[3]); + +void BKE_subdiv_eval_face_varying( + struct Subdiv *subdiv, + const int face_varying_channel, + const int ptex_face_index, + const float u, const float v, + float r_varying[2]); + +/* NOTE: Expects derivatives to be correct. + * + * TODO(sergey): This is currently used together with + * BKE_subdiv_eval_final_point() which cas easily evaluate derivatives. + * Would be nice to have dispalcement evaluation function which does not require + * knowing derivatives ahead of a time. + */ +void BKE_subdiv_eval_displacement( + struct Subdiv *subdiv, + const int ptex_face_index, + const float u, const float v, + const float dPdu[3], const float dPdv[3], + float r_D[3]); + +void BKE_subdiv_eval_final_point( + struct Subdiv *subdiv, + const int ptex_face_index, + const float u, const float v, + float r_P[3]); + +/* Patch queries at given resolution. + * + * Will evaluate patch at uniformly distributed (u, v) coordinates on a grid + * of given resolution, producing resolution^2 evaluation points. The order + * goes as u in rows, v in columns. + */ + +void BKE_subdiv_eval_limit_patch_resolution_point( + struct Subdiv *subdiv, + const int ptex_face_index, + const int resolution, + void *buffer, const int offset, const int stride); +void BKE_subdiv_eval_limit_patch_resolution_point_and_derivatives( + struct Subdiv *subdiv, + const int ptex_face_index, + const int resolution, + void *point_buffer, const int point_offset, const int point_stride, + void *du_buffer, const int du_offset, const int du_stride, + void *dv_buffer, const int dv_offset, const int dv_stride); +void BKE_subdiv_eval_limit_patch_resolution_point_and_normal( + struct Subdiv *subdiv, + const int ptex_face_index, + const int resolution, + void *point_buffer, const int point_offset, const int point_stride, + void *normal_buffer, const int normal_offset, const int normal_stride); +void BKE_subdiv_eval_limit_patch_resolution_point_and_short_normal( + struct Subdiv *subdiv, + const int ptex_face_index, + const int resolution, + void *point_buffer, const int point_offset, const int point_stride, + void *normal_buffer, const int normal_offset, const int normal_stride); + +#endif /* __BKE_SUBDIV_EVAL_H__ */ |