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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 *****
*/
#ifndef __BKE_SUBDIV_H__
#define __BKE_SUBDIV_H__
#include "BLI_sys_types.h"
struct Mesh;
struct OpenSubdiv_Converter;
struct OpenSubdiv_Evaluator;
struct OpenSubdiv_TopologyRefiner;
/** \file BKE_subdiv.h
* \ingroup bke
* \since July 2018
* \author Sergey Sharybin
*/
typedef enum {
SUBDIV_FVAR_LINEAR_INTERPOLATION_NONE,
SUBDIV_FVAR_LINEAR_INTERPOLATION_CORNERS_ONLY,
SUBDIV_FVAR_LINEAR_INTERPOLATION_BOUNDARIES,
SUBDIV_FVAR_LINEAR_INTERPOLATION_ALL,
} eSubdivFVarLinearInterpolation;
typedef struct SubdivSettings {
bool is_simple;
bool is_adaptive;
int level;
eSubdivFVarLinearInterpolation fvar_linear_interpolation;
} SubdivSettings;
/* NOTE: Order of enumerators MUST match order of values in SubdivStats. */
typedef enum eSubdivStatsValue {
SUBDIV_STATS_TOPOLOGY_REFINER_CREATION_TIME = 0,
SUBDIV_STATS_SUBDIV_TO_MESH,
SUBDIV_STATS_SUBDIV_TO_MESH_GEOMETRY,
SUBDIV_STATS_EVALUATOR_CREATE,
SUBDIV_STATS_EVALUATOR_REFINE,
NUM_SUBDIV_STATS_VALUES,
} eSubdivStatsValue;
typedef struct SubdivStats {
union {
struct {
/* Time spend on creating topology refiner, which includes time
* spend on conversion from Blender data to OpenSubdiv data, and
* time spend on topology orientation on OpenSubdiv C-API side.
*/
double topology_refiner_creation_time;
/* Total time spent in BKE_subdiv_to_mesh(). */
double subdiv_to_mesh_time;
/* Geometry (MVert and co) creation time during SUBDIV_TYO_MESH. */
double subdiv_to_mesh_geometry_time;
/* Time spent on evaluator creation from topology refiner. */
double evaluator_creation_time;
/* Time spent on evaluator->refine(). */
double evaluator_refine_time;
};
double values_[NUM_SUBDIV_STATS_VALUES];
};
/* Per-value timestamp on when corresponding BKE_subdiv_stats_begin() was
* called.
*/
double begin_timestamp_[NUM_SUBDIV_STATS_VALUES];
} SubdivStats;
typedef struct Subdiv {
/* Settings this subdivision surface is created for.
*
* It is read-only after assignment in BKE_subdiv_new_from_FOO().
*/
SubdivSettings settings;
/* Topology refiner includes all the glue logic to feed Blender side
* topology to OpenSubdiv. It can be shared by both evaluator and GL mesh
* drawer.
*/
struct OpenSubdiv_TopologyRefiner *topology_refiner;
/* CPU side evaluator. */
struct OpenSubdiv_Evaluator *evaluator;
SubdivStats stats;
} Subdiv;
/* =============================== STATISTICS =============================== */
void BKE_subdiv_stats_init(SubdivStats *stats);
void BKE_subdiv_stats_begin(SubdivStats *stats, eSubdivStatsValue value);
void BKE_subdiv_stats_end(SubdivStats *stats, eSubdivStatsValue value);
void BKE_subdiv_stats_print(const SubdivStats *stats);
/* ============================== CONSTRUCTION ============================== */
Subdiv *BKE_subdiv_new_from_converter(const SubdivSettings *settings,
struct OpenSubdiv_Converter *converter);
Subdiv *BKE_subdiv_new_from_mesh(const SubdivSettings *settings,
struct Mesh *mesh);
void BKE_subdiv_free(Subdiv *subdiv);
/* ============================= EVALUATION API ============================= */
void BKE_subdiv_eval_begin(Subdiv *subdiv);
void BKE_subdiv_eval_update_from_mesh(Subdiv *subdiv, const struct Mesh *mesh);
/* Single point queries. */
void BKE_subdiv_eval_limit_point(
Subdiv *subdiv,
const int ptex_face_index,
const float u, const float v,
float P[3]);
void BKE_subdiv_eval_limit_point_and_derivatives(
Subdiv *subdiv,
const int ptex_face_index,
const float u, const float v,
float P[3], float dPdu[3], float dPdv[3]);
void BKE_subdiv_eval_limit_point_and_normal(
Subdiv *subdiv,
const int ptex_face_index,
const float u, const float v,
float P[3], float N[3]);
void BKE_subdiv_eval_limit_point_and_short_normal(
Subdiv *subdiv,
const int ptex_face_index,
const float u, const float v,
float P[3], short N[3]);
void BKE_subdiv_eval_face_varying(
Subdiv *subdiv,
const int face_varying_channel,
const int ptex_face_index,
const float u, const float v,
float varying[2]);
/* 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(
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(
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(
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(
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);
/* =========================== SUBDIV TO MESH API =========================== */
typedef struct SubdivToMeshSettings {
/* Resolution at which ptex are being evaluated.
* This defines how many vertices final mesh will have: every ptex has
* resolution^2 vertices.
*/
int resolution;
} SubdivToMeshSettings;
/* Create real hi-res mesh from subdivision, all geometry is "real". */
struct Mesh *BKE_subdiv_to_mesh(
Subdiv *subdiv,
const SubdivToMeshSettings *settings,
const struct Mesh *coarse_mesh);
#endif /* __BKE_SUBDIV_H__ */
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