Blender  V2.93
Classes | Macros | Functions | Variables
hair_volume.cpp File Reference
#include "MEM_guardedalloc.h"
#include "BLI_math.h"
#include "BLI_utildefines.h"
#include "DNA_texture_types.h"
#include "BKE_effect.h"
#include "eigen_utils.h"
#include "implicit.h"

Go to the source code of this file.

Classes

struct  HairGridVert
 
struct  HairGrid
 

Macros

#define HAIR_GRID_INDEX_AXIS(vec, res, gmin, scale, axis)    (min_ii(max_ii((int)((vec[axis] - gmin[axis]) * scale), 0), res[axis] - 2))
 
#define MARGIN_i0   (i < 1)
 
#define MARGIN_j0   (j < 1)
 
#define MARGIN_k0   (k < 1)
 
#define MARGIN_i1   (i >= resA[0] - 1)
 
#define MARGIN_j1   (j >= resA[1] - 1)
 
#define MARGIN_k1   (k >= resA[2] - 1)
 
#define NEIGHBOR_MARGIN_i0   (i < 2)
 
#define NEIGHBOR_MARGIN_j0   (j < 2)
 
#define NEIGHBOR_MARGIN_k0   (k < 2)
 
#define NEIGHBOR_MARGIN_i1   (i >= resA[0] - 2)
 
#define NEIGHBOR_MARGIN_j1   (j >= resA[1] - 2)
 
#define NEIGHBOR_MARGIN_k1   (k >= resA[2] - 2)
 

Functions

BLI_INLINE int floor_int (float value)
 
BLI_INLINE float floor_mod (float value)
 
BLI_INLINE int hair_grid_size (const int res[3])
 
BLI_INLINE int hair_grid_offset (const float vec[3], const int res[3], const float gmin[3], float scale)
 
BLI_INLINE int hair_grid_interp_weights (const int res[3], const float gmin[3], float scale, const float vec[3], float uvw[3])
 
BLI_INLINE void hair_grid_interpolate (const HairGridVert *grid, const int res[3], const float gmin[3], float scale, const float vec[3], float *density, float velocity[3], float vel_smooth[3], float density_gradient[3], float velocity_gradient[3][3])
 
void SIM_hair_volume_vertex_grid_forces (HairGrid *grid, const float x[3], const float v[3], float smoothfac, float pressurefac, float minpressure, float f[3], float dfdx[3][3], float dfdv[3][3])
 
void SIM_hair_volume_grid_interpolate (HairGrid *grid, const float x[3], float *density, float velocity[3], float velocity_smooth[3], float density_gradient[3], float velocity_gradient[3][3])
 
void SIM_hair_volume_grid_velocity (HairGrid *grid, const float x[3], const float v[3], float fluid_factor, float r_v[3])
 
void SIM_hair_volume_grid_clear (HairGrid *grid)
 
BLI_INLINE bool hair_grid_point_valid (const float vec[3], const float gmin[3], const float gmax[3])
 
BLI_INLINE float dist_tent_v3f3 (const float a[3], float x, float y, float z)
 
BLI_INLINE float weights_sum (const float weights[8])
 
BLI_INLINE int hair_grid_weights (const int res[3], const float gmin[3], float scale, const float vec[3], float weights[8])
 
BLI_INLINE void grid_to_world (HairGrid *grid, float vecw[3], const float vec[3])
 
void SIM_hair_volume_add_vertex (HairGrid *grid, const float x[3], const float v[3])
 
BLI_INLINE void hair_volume_eval_grid_vertex_sample (HairGridVert *vert, const float loc[3], float radius, float dist_scale, const float x[3], const float v[3])
 
void SIM_hair_volume_add_segment (HairGrid *grid, const float UNUSED(x1[3]), const float UNUSED(v1[3]), const float x2[3], const float v2[3], const float x3[3], const float v3[3], const float UNUSED(x4[3]), const float UNUSED(v4[3]), const float UNUSED(dir1[3]), const float UNUSED(dir2[3]), const float UNUSED(dir3[3]))
 
void SIM_hair_volume_normalize_vertex_grid (HairGrid *grid)
 
BLI_INLINE float hair_volume_density_divergence (float density, float target_density, float strength)
 
bool SIM_hair_volume_solve_divergence (HairGrid *grid, float, float target_density, float target_strength)
 
HairGrid * SIM_hair_volume_create_vertex_grid (float cellsize, const float gmin[3], const float gmax[3])
 
void SIM_hair_volume_free_vertex_grid (HairGrid *grid)
 
void SIM_hair_volume_grid_geometry (HairGrid *grid, float *cellsize, int res[3], float gmin[3], float gmax[3])
 

Variables

static float I [3][3] = {{1, 0, 0}, {0, 1, 0}, {0, 0, 1}}
 
static const float density_threshold = 0.001f
 

Macro Definition Documentation

◆ HAIR_GRID_INDEX_AXIS

#define HAIR_GRID_INDEX_AXIS (   vec,
  res,
  gmin,
  scale,
  axis 
)     (min_ii(max_ii((int)((vec[axis] - gmin[axis]) * scale), 0), res[axis] - 2))

Definition at line 86 of file hair_volume.cpp.

◆ MARGIN_i0

#define MARGIN_i0   (i < 1)

◆ MARGIN_i1

#define MARGIN_i1   (i >= resA[0] - 1)

◆ MARGIN_j0

#define MARGIN_j0   (j < 1)

◆ MARGIN_j1

#define MARGIN_j1   (j >= resA[1] - 1)

◆ MARGIN_k0

#define MARGIN_k0   (k < 1)

◆ MARGIN_k1

#define MARGIN_k1   (k >= resA[2] - 1)

◆ NEIGHBOR_MARGIN_i0

#define NEIGHBOR_MARGIN_i0   (i < 2)

◆ NEIGHBOR_MARGIN_i1

#define NEIGHBOR_MARGIN_i1   (i >= resA[0] - 2)

◆ NEIGHBOR_MARGIN_j0

#define NEIGHBOR_MARGIN_j0   (j < 2)

◆ NEIGHBOR_MARGIN_j1

#define NEIGHBOR_MARGIN_j1   (j >= resA[1] - 2)

◆ NEIGHBOR_MARGIN_k0

#define NEIGHBOR_MARGIN_k0   (k < 2)

◆ NEIGHBOR_MARGIN_k1

#define NEIGHBOR_MARGIN_k1   (k >= resA[2] - 2)

Function Documentation

◆ dist_tent_v3f3()

BLI_INLINE float dist_tent_v3f3 ( const float  a[3],
float  x,
float  y,
float  z 
)

Definition at line 312 of file hair_volume.cpp.

References Freestyle::a, fabsf, w(), x, y, and z.

Referenced by hair_grid_weights().

◆ floor_int()

BLI_INLINE int floor_int ( float  value)

Definition at line 56 of file hair_volume.cpp.

Referenced by SIM_hair_volume_add_segment(), and SIM_hair_volume_create_vertex_grid().

◆ floor_mod()

BLI_INLINE float floor_mod ( float  value)

Definition at line 61 of file hair_volume.cpp.

References floorf.

◆ grid_to_world()

BLI_INLINE void grid_to_world ( HairGrid *  grid,
float  vecw[3],
const float  vec[3] 
)

Definition at line 358 of file hair_volume.cpp.

References add_v3_v3(), HairGrid::cellsize, copy_v3_v3(), HairGrid::gmin, and mul_v3_fl().

Referenced by SIM_hair_volume_solve_divergence().

◆ hair_grid_interp_weights()

BLI_INLINE int hair_grid_interp_weights ( const int  res[3],
const float  gmin[3],
float  scale,
const float  vec[3],
float  uvw[3] 
)

Definition at line 101 of file hair_volume.cpp.

References HAIR_GRID_INDEX_AXIS.

Referenced by hair_grid_interpolate().

◆ hair_grid_interpolate()

BLI_INLINE void hair_grid_interpolate ( const HairGridVert *  grid,
const int  res[3],
const float  gmin[3],
float  scale,
const float  vec[3],
float *  density,
float  velocity[3],
float  vel_smooth[3],
float  density_gradient[3],
float  velocity_gradient[3][3] 
)

Definition at line 122 of file hair_volume.cpp.

References data, hair_grid_interp_weights(), and zero_m3().

Referenced by SIM_hair_volume_grid_interpolate(), SIM_hair_volume_grid_velocity(), and SIM_hair_volume_vertex_grid_forces().

◆ hair_grid_offset()

BLI_INLINE int hair_grid_offset ( const float  vec[3],
const int  res[3],
const float  gmin[3],
float  scale 
)

Definition at line 89 of file hair_volume.cpp.

References HAIR_GRID_INDEX_AXIS.

◆ hair_grid_point_valid()

BLI_INLINE bool hair_grid_point_valid ( const float  vec[3],
const float  gmin[3],
const float  gmax[3] 
)

Definition at line 306 of file hair_volume.cpp.

Referenced by SIM_hair_volume_add_vertex().

◆ hair_grid_size()

BLI_INLINE int hair_grid_size ( const int  res[3])

Definition at line 66 of file hair_volume.cpp.

Referenced by SIM_hair_volume_create_vertex_grid(), SIM_hair_volume_grid_clear(), and SIM_hair_volume_normalize_vertex_grid().

◆ hair_grid_weights()

BLI_INLINE int hair_grid_weights ( const int  res[3],
const float  gmin[3],
float  scale,
const float  vec[3],
float  weights[8] 
)

Definition at line 329 of file hair_volume.cpp.

References dist_tent_v3f3(), and HAIR_GRID_INDEX_AXIS.

Referenced by SIM_hair_volume_add_vertex().

◆ hair_volume_density_divergence()

BLI_INLINE float hair_volume_density_divergence ( float  density,
float  target_density,
float  strength 
)

Definition at line 706 of file hair_volume.cpp.

References density_threshold, and logf.

Referenced by SIM_hair_volume_solve_divergence().

◆ hair_volume_eval_grid_vertex_sample()

BLI_INLINE void hair_volume_eval_grid_vertex_sample ( HairGridVert *  vert,
const float  loc[3],
float  radius,
float  dist_scale,
const float  x[3],
const float  v[3] 
)

Definition at line 613 of file hair_volume.cpp.

References HairGridVert::density, len_v3v3(), madd_v3_v3fl(), HairGridVert::samples, v, HairGridVert::velocity, and x.

Referenced by SIM_hair_volume_add_segment().

◆ SIM_hair_volume_add_segment()

void SIM_hair_volume_add_segment ( HairGrid *  grid,
const float   UNUSEDx1[3],
const float   UNUSEDv1[3],
const float  x2[3],
const float  v2[3],
const float  x3[3],
const float  v3[3],
const float   UNUSEDx4[3],
const float   UNUSEDv4[3],
const float   UNUSEDdir1[3],
const float   UNUSEDdir2[3],
const float   UNUSEDdir3[3] 
)

Definition at line 636 of file hair_volume.cpp.

References float(), floor_int(), hair_volume_eval_grid_vertex_sample(), interp_v3_v3v3(), HairGrid::inv_cellsize, max_ii(), min_ii(), HairGrid::res, stride, v, v2, HairGrid::verts, x, and x2.

Referenced by cloth_continuum_add_hair_segments().

◆ SIM_hair_volume_add_vertex()

void SIM_hair_volume_add_vertex ( HairGrid *  grid,
const float  x[3],
const float  v[3] 
)

Definition at line 365 of file hair_volume.cpp.

References HairGridVert::density, HairGrid::gmax, HairGrid::gmin, hair_grid_point_valid(), hair_grid_weights(), HairGrid::inv_cellsize, madd_v3_v3fl(), HairGrid::res, v, HairGridVert::velocity, HairGrid::verts, and x.

Referenced by cloth_continuum_fill_grid().

◆ SIM_hair_volume_create_vertex_grid()

HairGrid* SIM_hair_volume_create_vertex_grid ( float  cellsize,
const float  gmin[3],
const float  gmax[3] 
)

Definition at line 1114 of file hair_volume.cpp.

References HairGrid::cellsize, copy_v3_v3(), float(), floor_int(), HairGrid::gmax, HairGrid::gmin, hair_grid_size(), HairGrid::inv_cellsize, MAX_HAIR_GRID_RES, MEM_callocN, HairGrid::res, size(), sub_v3_v3v3(), and HairGrid::verts.

Referenced by cloth_continuum_step().

◆ SIM_hair_volume_free_vertex_grid()

void SIM_hair_volume_free_vertex_grid ( HairGrid *  grid)

Definition at line 1171 of file hair_volume.cpp.

References MEM_freeN, and HairGrid::verts.

Referenced by cloth_continuum_step().

◆ SIM_hair_volume_grid_clear()

void SIM_hair_volume_grid_clear ( HairGrid *  grid)

Definition at line 294 of file hair_volume.cpp.

References HairGridVert::density, hair_grid_size(), HairGrid::res, HairGridVert::samples, size(), HairGridVert::velocity, HairGridVert::velocity_smooth, HairGrid::verts, and zero_v3().

◆ SIM_hair_volume_grid_geometry()

void SIM_hair_volume_grid_geometry ( HairGrid *  grid,
float *  cellsize,
int  res[3],
float  gmin[3],
float  gmax[3] 
)

Definition at line 1181 of file hair_volume.cpp.

References HairGrid::cellsize, copy_v3_v3(), copy_v3_v3_int(), HairGrid::gmax, HairGrid::gmin, and HairGrid::res.

Referenced by cloth_continuum_fill_grid(), and cloth_continuum_step().

◆ SIM_hair_volume_grid_interpolate()

void SIM_hair_volume_grid_interpolate ( HairGrid *  grid,
const float  x[3],
float *  density,
float  velocity[3],
float  velocity_smooth[3],
float  density_gradient[3],
float  velocity_gradient[3][3] 
)

Definition at line 247 of file hair_volume.cpp.

References HairGrid::gmin, hair_grid_interpolate(), HairGrid::inv_cellsize, HairGrid::res, HairGrid::verts, and x.

Referenced by cloth_continuum_step().

◆ SIM_hair_volume_grid_velocity()

void SIM_hair_volume_grid_velocity ( HairGrid *  grid,
const float  x[3],
const float  v[3],
float  fluid_factor,
float  r_v[3] 
)

Definition at line 267 of file hair_volume.cpp.

References add_v3_v3(), copy_v3_v3(), HairGrid::gmin, hair_grid_interpolate(), interp_v3_v3v3(), HairGrid::inv_cellsize, HairGrid::res, sub_v3_v3v3(), v, HairGrid::verts, and x.

Referenced by cloth_continuum_step().

◆ SIM_hair_volume_normalize_vertex_grid()

void SIM_hair_volume_normalize_vertex_grid ( HairGrid *  grid)

Definition at line 687 of file hair_volume.cpp.

References HairGridVert::density, hair_grid_size(), mul_v3_fl(), HairGrid::res, size(), HairGridVert::velocity, and HairGrid::verts.

Referenced by cloth_continuum_fill_grid().

◆ SIM_hair_volume_solve_divergence()

bool SIM_hair_volume_solve_divergence ( HairGrid *  grid,
float  dt,
float  target_density,
float  target_strength 
)

Definition at line 717 of file hair_volume.cpp.

References A, add_v3_v3v3(), B, BKE_sim_debug_data_add_circle, BLI_assert, HairGrid::cellsize, CLAMPIS, col, HairGridVert::density, density_threshold, float(), HairGrid::gmin, grid_to_world(), hair_volume_density_divergence(), interp_v3_v3v3(), MARGIN_i0, MARGIN_i1, MARGIN_j0, MARGIN_j1, MARGIN_k0, MARGIN_k1, mul_v3_fl(), NEIGHBOR_MARGIN_i0, NEIGHBOR_MARGIN_i1, NEIGHBOR_MARGIN_j0, NEIGHBOR_MARGIN_j1, NEIGHBOR_MARGIN_k0, NEIGHBOR_MARGIN_k1, HairGrid::res, sub_v3_v3v3(), HairGridVert::velocity, HairGridVert::velocity_smooth, HairGrid::verts, and zero_v3().

Referenced by cloth_continuum_step().

◆ SIM_hair_volume_vertex_grid_forces()

void SIM_hair_volume_vertex_grid_forces ( HairGrid *  grid,
const float  x[3],
const float  v[3],
float  smoothfac,
float  pressurefac,
float  minpressure,
float  f[3],
float  dfdx[3][3],
float  dfdv[3][3] 
)

Definition at line 208 of file hair_volume.cpp.

References HairGrid::gmin, hair_grid_interpolate(), I, HairGrid::inv_cellsize, madd_v3_v3fl(), mul_m3_fl(), mul_v3_fl(), mul_v3_v3fl(), normalize_v3(), HairGrid::res, sub_m3_m3m3(), sub_v3_v3(), v, HairGrid::verts, x, zero_m3(), and zero_v3().

◆ weights_sum()

BLI_INLINE float weights_sum ( const float  weights[8])

Definition at line 318 of file hair_volume.cpp.

Variable Documentation

◆ density_threshold

const float density_threshold = 0.001f
static

Definition at line 700 of file hair_volume.cpp.

Referenced by hair_volume_density_divergence(), and SIM_hair_volume_solve_divergence().

◆ I

float I[3][3] = {{1, 0, 0}, {0, 1, 0}, {0, 0, 1}}
static

Definition at line 54 of file hair_volume.cpp.

Referenced by SIM_hair_volume_vertex_grid_forces().

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