305 lines
12 KiB
C
305 lines
12 KiB
C
/*
|
|
* 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
|
|
* \ingroup bke
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "BLI_compiler_compat.h"
|
|
#include "BLI_sys_types.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
struct Mesh;
|
|
struct MultiresModifierData;
|
|
struct OpenSubdiv_Converter;
|
|
struct OpenSubdiv_Evaluator;
|
|
struct OpenSubdiv_TopologyRefiner;
|
|
struct Subdiv;
|
|
|
|
typedef enum eSubdivVtxBoundaryInterpolation {
|
|
/* Do not interpolate boundaries. */
|
|
SUBDIV_VTX_BOUNDARY_NONE,
|
|
/* Sharpen edges. */
|
|
SUBDIV_VTX_BOUNDARY_EDGE_ONLY,
|
|
/* sharpen edges and corners, */
|
|
SUBDIV_VTX_BOUNDARY_EDGE_AND_CORNER,
|
|
} eSubdivVtxBoundaryInterpolation;
|
|
|
|
typedef enum eSubdivFVarLinearInterpolation {
|
|
SUBDIV_FVAR_LINEAR_INTERPOLATION_NONE,
|
|
SUBDIV_FVAR_LINEAR_INTERPOLATION_CORNERS_ONLY,
|
|
SUBDIV_FVAR_LINEAR_INTERPOLATION_CORNERS_AND_JUNCTIONS,
|
|
SUBDIV_FVAR_LINEAR_INTERPOLATION_CORNERS_JUNCTIONS_AND_CONCAVE,
|
|
SUBDIV_FVAR_LINEAR_INTERPOLATION_BOUNDARIES,
|
|
SUBDIV_FVAR_LINEAR_INTERPOLATION_ALL,
|
|
} eSubdivFVarLinearInterpolation;
|
|
|
|
typedef struct SubdivSettings {
|
|
/* Simple subdivision corresponds to "Simple" option in the interface. When it's enabled the
|
|
* subdivided mesh is not "smoothed": new vertices are added uniformly on the existing surface.
|
|
*
|
|
* On an OpenSubdiv implementation level this translates to a subdivision scheme:
|
|
* when is_simple is true OSD_SCHEME_BILINEAR is used, otherwise OSD_SCHEME_CATMARK. */
|
|
bool is_simple;
|
|
|
|
/* This refers to an adaptive isolation when creating patches for the subdivided surface.
|
|
*
|
|
* When is set to false (aka uniform subdivision) fixed depth of isolation is used, which
|
|
* allows to iteratively add more subdivisions (uniform subdivision level 2 = uniform subdivision
|
|
* level 1 + uniform subdivision level 1). Uniform subdivisions will progressively go to a limit
|
|
* surface.
|
|
*
|
|
* Adaptive isolation generates patches at a limit surface (aka as if infinite number of uniform
|
|
* subdivisions have been applied). This setting allows to have matches normal and tangent space
|
|
* the same independent of number of subdivisions set in modifier settings. */
|
|
bool is_adaptive;
|
|
|
|
/* Corresponds to Quality option in modifier settings: higher values means the final surface
|
|
* will be more accurately represented by patches.
|
|
*
|
|
* On an OpenSubdiv implementation level this is an isolation level. */
|
|
int level;
|
|
|
|
bool use_creases;
|
|
|
|
eSubdivVtxBoundaryInterpolation vtx_boundary_interpolation;
|
|
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,
|
|
SUBDIV_STATS_SUBDIV_TO_CCG,
|
|
SUBDIV_STATS_SUBDIV_TO_CCG_ELEMENTS,
|
|
SUBDIV_STATS_TOPOLOGY_COMPARE,
|
|
|
|
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;
|
|
/* Total time spent on whole CCG creation. */
|
|
double subdiv_to_ccg_time;
|
|
/* Time spent on CCG elements evaluation/initialization. */
|
|
double subdiv_to_ccg_elements_time;
|
|
/* Time spent on CCG elements evaluation/initialization. */
|
|
double topology_compare_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;
|
|
|
|
/* Functor which evaluates displacement at a given (u, v) of given ptex face. */
|
|
typedef struct SubdivDisplacement {
|
|
/* Initialize displacement evaluator.
|
|
*
|
|
* Is called right before evaluation is actually needed. This allows to do
|
|
* some lazy initialization, like allocate evaluator from a main thread but
|
|
* then do actual evaluation from background job. */
|
|
void (*initialize)(struct SubdivDisplacement *displacement);
|
|
|
|
/* Return displacement which is to be added to the original coordinate.
|
|
*
|
|
* NOTE: This function is supposed to return "continuous" displacement for
|
|
* each pf PTex faces created for special (non-quad) polygon. This means,
|
|
* if displacement is stored on per-corner manner (like MDisps for multires)
|
|
* this is up the displacement implementation to average boundaries of the
|
|
* displacement grids if needed.
|
|
*
|
|
* Averaging of displacement for vertices created for over coarse vertices
|
|
* and edges is done by subdiv code. */
|
|
void (*eval_displacement)(struct SubdivDisplacement *displacement,
|
|
const int ptex_face_index,
|
|
const float u,
|
|
const float v,
|
|
const float dPdu[3],
|
|
const float dPdv[3],
|
|
float r_D[3]);
|
|
|
|
/* Free the data, not the evaluator itself. */
|
|
void (*free)(struct SubdivDisplacement *displacement);
|
|
|
|
void *user_data;
|
|
} SubdivDisplacement;
|
|
|
|
/* This structure contains everything needed to construct subdivided surface.
|
|
* It does not specify storage, memory layout or anything else.
|
|
* It is possible to create different storage's (like, grid based CPU side
|
|
* buffers, GPU subdivision mesh, CPU side fully qualified mesh) from the same
|
|
* Subdiv structure. */
|
|
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;
|
|
/* Optional displacement evaluator. */
|
|
struct SubdivDisplacement *displacement_evaluator;
|
|
/* Statistics for debugging. */
|
|
SubdivStats stats;
|
|
|
|
/* Cached values, are not supposed to be accessed directly. */
|
|
struct {
|
|
/* Indexed by base face index, element indicates total number of ptex
|
|
* faces created for preceding base faces. */
|
|
int *face_ptex_offset;
|
|
} cache_;
|
|
} Subdiv;
|
|
|
|
/* =================----====--===== MODULE ==========================------== */
|
|
|
|
/* (De)initialize the entire subdivision surface module. */
|
|
void BKE_subdiv_init(void);
|
|
void BKE_subdiv_exit(void);
|
|
|
|
/* ========================== CONVERSION HELPERS ============================ */
|
|
|
|
/* NOTE: uv_smooth is eSubsurfUVSmooth. */
|
|
eSubdivFVarLinearInterpolation BKE_subdiv_fvar_interpolation_from_uv_smooth(int uv_smooth);
|
|
|
|
eSubdivVtxBoundaryInterpolation BKE_subdiv_vtx_boundary_interpolation_from_subsurf(
|
|
int boundary_smooth);
|
|
|
|
/* =============================== 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_reset(SubdivStats *stats, eSubdivStatsValue value);
|
|
|
|
void BKE_subdiv_stats_print(const SubdivStats *stats);
|
|
|
|
/* ================================ SETTINGS ================================ */
|
|
|
|
bool BKE_subdiv_settings_equal(const SubdivSettings *settings_a, const SubdivSettings *settings_b);
|
|
|
|
/* ============================== CONSTRUCTION ============================== */
|
|
|
|
/* Construct new subdivision surface descriptor, from scratch, using given
|
|
* settings and topology. */
|
|
Subdiv *BKE_subdiv_new_from_converter(const SubdivSettings *settings,
|
|
struct OpenSubdiv_Converter *converter);
|
|
Subdiv *BKE_subdiv_new_from_mesh(const SubdivSettings *settings, const struct Mesh *mesh);
|
|
|
|
/* Similar to above, but will not re-create descriptor if it was created for the
|
|
* same settings and topology.
|
|
* If settings or topology did change, the existing descriptor is freed and a
|
|
* new one is created from scratch.
|
|
*
|
|
* NOTE: It is allowed to pass NULL as an existing subdivision surface
|
|
* descriptor. This will create a new descriptor without any extra checks.
|
|
*/
|
|
Subdiv *BKE_subdiv_update_from_converter(Subdiv *subdiv,
|
|
const SubdivSettings *settings,
|
|
struct OpenSubdiv_Converter *converter);
|
|
Subdiv *BKE_subdiv_update_from_mesh(Subdiv *subdiv,
|
|
const SubdivSettings *settings,
|
|
const struct Mesh *mesh);
|
|
|
|
void BKE_subdiv_free(Subdiv *subdiv);
|
|
|
|
/* ============================ DISPLACEMENT API ============================ */
|
|
|
|
void BKE_subdiv_displacement_attach_from_multires(Subdiv *subdiv,
|
|
struct Mesh *mesh,
|
|
const struct MultiresModifierData *mmd);
|
|
|
|
void BKE_subdiv_displacement_detach(Subdiv *subdiv);
|
|
|
|
/* ============================ TOPOLOGY HELPERS ============================ */
|
|
|
|
int *BKE_subdiv_face_ptex_offset_get(Subdiv *subdiv);
|
|
|
|
/* =========================== PTEX FACES AND GRIDS ========================= */
|
|
|
|
/* For a given (ptex_u, ptex_v) within a ptex face get corresponding
|
|
* (grid_u, grid_v) within a grid. */
|
|
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);
|
|
|
|
/* Inverse of above. */
|
|
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);
|
|
|
|
/* For a given subdivision level (which is NOT refinement level) get size of
|
|
* CCG grid (number of grid points on a side).
|
|
*/
|
|
BLI_INLINE int BKE_subdiv_grid_size_from_level(const int level);
|
|
|
|
/* Simplified version of mdisp_rot_face_to_crn, only handles quad and
|
|
* works in normalized coordinates.
|
|
*
|
|
* NOTE: Output coordinates are in ptex coordinates. */
|
|
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);
|
|
|
|
/* Converts (u, v) coordinate from within a grid to a quad coordinate in
|
|
* normalized ptex coordinates. */
|
|
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);
|
|
|
|
/* Convert Blender edge crease value to OpenSubdiv sharpness. */
|
|
BLI_INLINE float BKE_subdiv_edge_crease_to_sharpness_f(float edge_crease);
|
|
BLI_INLINE float BKE_subdiv_edge_crease_to_sharpness_char(char edge_crease);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#include "intern/subdiv_inline.h"
|