128 lines
4.4 KiB
C
128 lines
4.4 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 BKE_subdiv_eval.h
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* \ingroup bke
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* \since September 2018
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* \author Sergey Sharybin
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*/
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#ifndef __BKE_SUBDIV_EVAL_H__
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#define __BKE_SUBDIV_EVAL_H__
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#include "BLI_sys_types.h"
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struct Mesh;
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struct Subdiv;
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/* Returns true if evaluator is ready for use. */
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bool BKE_subdiv_eval_begin(struct Subdiv *subdiv);
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bool BKE_subdiv_eval_update_from_mesh(struct Subdiv *subdiv,
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const struct Mesh *mesh);
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/* Single point queries. */
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void BKE_subdiv_eval_limit_point(
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struct Subdiv *subdiv,
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const int ptex_face_index,
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const float u, const float v,
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float r_P[3]);
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void BKE_subdiv_eval_limit_point_and_derivatives(
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struct Subdiv *subdiv,
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const int ptex_face_index,
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const float u, const float v,
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float r_P[3], float r_dPdu[3], float r_dPdv[3]);
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void BKE_subdiv_eval_limit_point_and_normal(
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struct Subdiv *subdiv,
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const int ptex_face_index,
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const float u, const float v,
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float r_P[3], float r_N[3]);
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void BKE_subdiv_eval_limit_point_and_short_normal(
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struct Subdiv *subdiv,
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const int ptex_face_index,
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const float u, const float v,
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float r_P[3], short r_N[3]);
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void BKE_subdiv_eval_face_varying(
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struct Subdiv *subdiv,
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const int face_varying_channel,
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const int ptex_face_index,
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const float u, const float v,
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float r_varying[2]);
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/* NOTE: Expects derivatives to be correct.
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*
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* TODO(sergey): This is currently used together with
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* BKE_subdiv_eval_final_point() which cas easily evaluate derivatives.
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* Would be nice to have dispalcement evaluation function which does not require
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* knowing derivatives ahead of a time.
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*/
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void BKE_subdiv_eval_displacement(
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struct Subdiv *subdiv,
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const int ptex_face_index,
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const float u, const float v,
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const float dPdu[3], const float dPdv[3],
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float r_D[3]);
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void BKE_subdiv_eval_final_point(
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struct Subdiv *subdiv,
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const int ptex_face_index,
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const float u, const float v,
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float r_P[3]);
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/* Patch queries at given resolution.
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*
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* Will evaluate patch at uniformly distributed (u, v) coordinates on a grid
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* of given resolution, producing resolution^2 evaluation points. The order
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* goes as u in rows, v in columns.
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*/
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void BKE_subdiv_eval_limit_patch_resolution_point(
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struct Subdiv *subdiv,
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const int ptex_face_index,
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const int resolution,
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void *buffer, const int offset, const int stride);
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void BKE_subdiv_eval_limit_patch_resolution_point_and_derivatives(
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struct Subdiv *subdiv,
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const int ptex_face_index,
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const int resolution,
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void *point_buffer, const int point_offset, const int point_stride,
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void *du_buffer, const int du_offset, const int du_stride,
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void *dv_buffer, const int dv_offset, const int dv_stride);
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void BKE_subdiv_eval_limit_patch_resolution_point_and_normal(
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struct Subdiv *subdiv,
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const int ptex_face_index,
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const int resolution,
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void *point_buffer, const int point_offset, const int point_stride,
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void *normal_buffer, const int normal_offset, const int normal_stride);
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void BKE_subdiv_eval_limit_patch_resolution_point_and_short_normal(
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struct Subdiv *subdiv,
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const int ptex_face_index,
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const int resolution,
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void *point_buffer, const int point_offset, const int point_stride,
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void *normal_buffer, const int normal_offset, const int normal_stride);
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#endif /* __BKE_SUBDIV_EVAL_H__ */
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