Blender V4.3
Functions | Variables
SIM_mass_spring.cc File Reference
#include <algorithm>
#include "MEM_guardedalloc.h"
#include "DNA_cloth_types.h"
#include "DNA_modifier_types.h"
#include "DNA_object_force_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "BLI_linklist.h"
#include "BLI_math_geom.h"
#include "BLI_math_vector.h"
#include "BLI_math_vector.hh"
#include "BLI_utildefines.h"
#include "BKE_cloth.hh"
#include "BKE_collision.h"
#include "BKE_effect.h"
#include "SIM_mass_spring.h"
#include "implicit.h"
#include "DEG_depsgraph.hh"
#include "DEG_depsgraph_query.hh"

Go to the source code of this file.

Functions

static int cloth_count_nondiag_blocks (Cloth *cloth)
 
static bool cloth_get_pressure_weights (ClothModifierData *clmd, const blender::int3 &vert_tri, float *r_weights)
 
static void cloth_calc_pressure_gradient (ClothModifierData *clmd, const float gradient_vector[3], float *r_vertex_pressure)
 
static float cloth_calc_volume (ClothModifierData *clmd)
 
static float cloth_calc_rest_volume (ClothModifierData *clmd)
 
static float cloth_calc_average_pressure (ClothModifierData *clmd, const float *vertex_pressure)
 
int SIM_cloth_solver_init (Object *, ClothModifierData *clmd)
 
void SIM_mass_spring_set_implicit_vertex_mass (Implicit_Data *data, int index, float mass)
 
void SIM_cloth_solver_free (ClothModifierData *clmd)
 
void SIM_cloth_solver_set_positions (ClothModifierData *clmd)
 
void SIM_cloth_solver_set_volume (ClothModifierData *clmd)
 
static void cloth_setup_constraints (ClothModifierData *clmd)
 
static int UNUSED_FUNCTION cloth_calc_helper_forces (Object *, ClothModifierData *clmd, float(*initial_cos)[3], float, float dt)
 
BLI_INLINE void cloth_calc_spring_force (ClothModifierData *clmd, ClothSpring *s)
 
static void hair_get_boundbox (ClothModifierData *clmd, blender::float3 &gmin, blender::float3 &gmax)
 
static void cloth_calc_force (Scene *scene, ClothModifierData *clmd, float, ListBase *effectors, float time)
 
BLI_INLINE void cloth_get_grid_location (Implicit_Data *data, float cell_scale, const float cell_offset[3], int index, float x[3], float v[3])
 
BLI_INLINE LinkNode * hair_spring_next (LinkNode *spring_link)
 
static LinkNode * cloth_continuum_add_hair_segments (HairGrid *grid, const float cell_scale, const float cell_offset[3], Cloth *cloth, LinkNode *spring_link)
 
static void cloth_continuum_fill_grid (HairGrid *grid, Cloth *cloth)
 
static void cloth_continuum_step (ClothModifierData *clmd, float dt)
 
static void cloth_calc_average_acceleration (ClothModifierData *clmd, float dt)
 
static void cloth_solve_collisions (Depsgraph *depsgraph, Object *ob, ClothModifierData *clmd, float step, float dt)
 
static void cloth_clear_result (ClothModifierData *clmd)
 
static void cloth_record_result (ClothModifierData *clmd, ImplicitSolverResult *result, float dt)
 
int SIM_cloth_solve (Depsgraph *depsgraph, Object *ob, float frame, ClothModifierData *clmd, ListBase *effectors)
 

Variables

static float I3 [3][3] = {{1.0, 0.0, 0.0}, {0.0, 1.0, 0.0}, {0.0, 0.0, 1.0}}
 

Function Documentation

◆ cloth_calc_average_acceleration()

static void cloth_calc_average_acceleration ( ClothModifierData * clmd,
float dt )
static

Definition at line 1151 of file SIM_mass_spring.cc.

References add_v3_v3(), ClothModifierData::clothObject, interp_v3_v3v3(), mul_v3_fl(), powf, SIM_mass_spring_get_new_velocity(), SIM_mass_spring_get_velocity(), sub_v3_v3(), and v.

Referenced by SIM_cloth_solve().

◆ cloth_calc_average_pressure()

static float cloth_calc_average_pressure ( ClothModifierData * clmd,
const float * vertex_pressure )
static

Definition at line 157 of file SIM_mass_spring.cc.

References cloth_get_pressure_weights(), ClothModifierData::clothObject, and SIM_tri_area().

Referenced by cloth_calc_force().

◆ cloth_calc_force()

static void cloth_calc_force ( Scene * scene,
ClothModifierData * clmd,
float ,
ListBase * effectors,
float time )
static

Definition at line 570 of file SIM_mass_spring.cc.

References ClothSimSettings::avg_spring_len, BKE_effectors_apply(), CLAMP_MAX, cloth_calc_average_pressure(), cloth_calc_pressure_gradient(), cloth_calc_spring_force(), cloth_calc_volume(), cloth_get_pressure_weights(), CLOTH_SIMSETTINGS_FLAG_PRESSURE, CLOTH_SIMSETTINGS_FLAG_PRESSURE_VOL, CLOTH_SPRING_FLAG_DEACTIVATE, CLOTH_SPRING_TYPE_STRUCTURAL, CLOTH_VERT_FLAG_PINNED, ClothModifierData::clothObject, copy_v3_v3(), ClothSimSettings::Cvi, ClothSimSettings::effector_weights, fabs(), ClothSimSettings::flags, ClothSpring::flags, ClothVertex::flags, float, ClothSimSettings::fluid_density, EffectorWeights::global_gravity, ClothVertex::goal, ClothSimSettings::goalfrict, ClothSimSettings::goalspring, ClothModifierData::hairdata, ClothSpring::ij, interp_v3_v3v3(), is_zero_v3(), ClothSpring::kl, ClothVertex::mass, MEM_callocN, MEM_freeN(), MEM_mallocN, mul_v3_fl(), mul_v3_v3fl(), pd_point_from_loc(), PHYS_GLOBAL_GRAVITY, ClothSimSettings::pressure_factor, ClothHairData::radius, SIM_mass_spring_force_drag(), SIM_mass_spring_force_edge_wind(), SIM_mass_spring_force_face_extern(), SIM_mass_spring_force_face_wind(), SIM_mass_spring_force_gravity(), SIM_mass_spring_force_pressure(), SIM_mass_spring_force_spring_goal(), SIM_mass_spring_force_vertex_wind(), SIM_mass_spring_get_motion_state(), ClothModifierData::sim_parms, sub_v3_v3(), sub_v3_v3v3(), ClothSimSettings::target_volume, ClothSimSettings::time_scale, ClothSpring::type, ClothSimSettings::uniform_pressure_force, v, ClothVertex::xconst, and ClothVertex::xold.

Referenced by SIM_cloth_solve().

◆ cloth_calc_helper_forces()

static int UNUSED_FUNCTION cloth_calc_helper_forces ( Object * ,
ClothModifierData * clmd,
float(*) initial_cos[3],
float ,
float dt )
static

Computes where the cloth would be if it were subject to perfectly stiff edges (edge distance constraints) in a lagrangian solver. Then add forces to help guide the implicit solver to that state. This function is called after collisions.

Definition at line 278 of file SIM_mass_spring.cc.

References add_v3_v3(), CLOTH_SPRING_TYPE_SHEAR, CLOTH_SPRING_TYPE_STRUCTURAL, copy_v3_v3(), cos(), e, ELEM, float, ClothVertex::goal, ClothSpring::ij, ClothSpring::kl, l, len, len_squared_v3v3(), len_v3v3(), ClothVertex::mass, MEM_callocN, MEM_freeN(), mul_v3_fl(), node, normalize_v3(), ClothSpring::restlen, steps, sub_v3_v3v3(), ClothVertex::tv, ClothVertex::tx, ClothSpring::type, and v2.

◆ cloth_calc_pressure_gradient()

static void cloth_calc_pressure_gradient ( ClothModifierData * clmd,
const float gradient_vector[3],
float * r_vertex_pressure )
static

Definition at line 85 of file SIM_mass_spring.cc.

References ClothModifierData::clothObject, dot_v3v3(), and SIM_mass_spring_get_position().

Referenced by cloth_calc_force().

◆ cloth_calc_rest_volume()

static float cloth_calc_rest_volume ( ClothModifierData * clmd)
static

Definition at line 128 of file SIM_mass_spring.cc.

References cloth_get_pressure_weights(), ClothModifierData::clothObject, ClothModifierData::hairdata, v, and volume_tri_tetrahedron_signed_v3_6x().

Referenced by SIM_cloth_solver_set_volume().

◆ cloth_calc_spring_force()

BLI_INLINE void cloth_calc_spring_force ( ClothModifierData * clmd,
ClothSpring * s )

Definition at line 359 of file SIM_mass_spring.cc.

References ClothSimSettings::avg_spring_len, ClothSimSettings::bending, ClothSimSettings::bending_damping, ClothSimSettings::bending_model, BKE_sim_debug_data_add_dot, BKE_sim_debug_data_add_line, BKE_sim_debug_data_add_vector, BLI_assert, CLOTH_BENDING_ANGULAR, CLOTH_SIMSETTINGS_FLAG_RESIST_SPRING_COMPRESS, CLOTH_SPRING_FLAG_NEEDED, CLOTH_SPRING_TYPE_BENDING, CLOTH_SPRING_TYPE_BENDING_HAIR, CLOTH_SPRING_TYPE_INTERNAL, CLOTH_SPRING_TYPE_SEWING, CLOTH_SPRING_TYPE_SHEAR, CLOTH_SPRING_TYPE_STRUCTURAL, ClothModifierData::clothObject, ClothSimSettings::compression, ClothSimSettings::compression_damp, copy_v3_v3(), fabsf, ClothSimSettings::flags, ClothSimSettings::internal_compression, ClothSimSettings::internal_tension, ClothSimSettings::max_bend, ClothSimSettings::max_compression, ClothSimSettings::max_internal_compression, ClothSimSettings::max_internal_tension, ClothSimSettings::max_sewing, ClothSimSettings::max_shear, ClothSimSettings::max_tension, ClothSimSettings::shear, ClothSimSettings::shear_damp, SIM_mass_spring_force_spring_angular(), SIM_mass_spring_force_spring_bending(), SIM_mass_spring_force_spring_bending_hair(), SIM_mass_spring_force_spring_linear(), SIM_mass_spring_get_motion_state(), ClothModifierData::sim_parms, ClothSimSettings::tension, ClothSimSettings::tension_damp, and v.

Referenced by cloth_calc_force().

◆ cloth_calc_volume()

static float cloth_calc_volume ( ClothModifierData * clmd)
static

Definition at line 100 of file SIM_mass_spring.cc.

References cloth_get_pressure_weights(), ClothModifierData::clothObject, ClothModifierData::hairdata, and SIM_tri_tetra_volume_signed_6x().

Referenced by cloth_calc_force().

◆ cloth_clear_result()

static void cloth_clear_result ( ClothModifierData * clmd)
static

Definition at line 1220 of file SIM_mass_spring.cc.

References ClothSolverResult::avg_error, ClothSolverResult::avg_iterations, ClothSolverResult::max_error, ClothSolverResult::max_iterations, ClothSolverResult::min_error, ClothSolverResult::min_iterations, ClothModifierData::solver_result, and ClothSolverResult::status.

Referenced by SIM_cloth_solve().

◆ cloth_continuum_add_hair_segments()

static LinkNode * cloth_continuum_add_hair_segments ( HairGrid * grid,
const float cell_scale,
const float cell_offset[3],
Cloth * cloth,
LinkNode * spring_link )
static

Definition at line 825 of file SIM_mass_spring.cc.

References cloth_get_grid_location(), copy_v3_v3(), hair_spring_next(), ClothSpring::ij, ClothSpring::kl, LinkNode::link, LinkNode::next, normalize_v3(), SIM_hair_volume_add_segment(), sub_v3_v3v3(), v2, and zero_v3().

Referenced by cloth_continuum_fill_grid().

◆ cloth_continuum_fill_grid()

static void cloth_continuum_fill_grid ( HairGrid * grid,
Cloth * cloth )
static

Definition at line 910 of file SIM_mass_spring.cc.

References cloth_continuum_add_hair_segments(), CLOTH_SPRING_TYPE_STRUCTURAL, LinkNode::link, mul_v3_v3fl(), negate_v3(), LinkNode::next, SIM_hair_volume_add_vertex(), SIM_hair_volume_grid_geometry(), SIM_hair_volume_normalize_vertex_grid(), ClothSpring::type, and v.

Referenced by cloth_continuum_step().

◆ cloth_continuum_step()

static void cloth_continuum_step ( ClothModifierData * clmd,
float dt )
static

Definition at line 950 of file SIM_mass_spring.cc.

References b, BKE_sim_debug_data_add_circle, BKE_sim_debug_data_add_dot, BKE_sim_debug_data_add_vector, BKE_sim_debug_data_clear_category(), cloth_continuum_fill_grid(), ClothModifierData::clothObject, col, copy_v3_v3(), ClothSimSettings::density_strength, ClothSimSettings::density_target, hair_get_boundbox(), ClothModifierData::hair_grid_cellsize, ClothModifierData::hair_grid_max, ClothModifierData::hair_grid_min, ClothModifierData::hair_grid_res, interp_v3_v3v3(), is_zero_v3(), madd_v3_v3fl(), madd_v3_v3v3fl(), SIM_hair_volume_create_vertex_grid(), SIM_hair_volume_free_vertex_grid(), SIM_hair_volume_grid_geometry(), SIM_hair_volume_grid_interpolate(), SIM_hair_volume_grid_velocity(), SIM_hair_volume_solve_divergence(), SIM_mass_spring_get_new_velocity(), SIM_mass_spring_get_position(), SIM_mass_spring_set_new_velocity(), ClothModifierData::sim_parms, size(), sub_v3_v3v3(), v, ClothSimSettings::velocity_smooth, ClothSimSettings::voxel_cell_size, zero_v3(), and zero_v3_int().

Referenced by SIM_cloth_solve().

◆ cloth_count_nondiag_blocks()

static int cloth_count_nondiag_blocks ( Cloth * cloth)
static

Definition at line 40 of file SIM_mass_spring.cc.

References CLOTH_SPRING_TYPE_BENDING_HAIR, LinkNode::link, LinkNode::next, and ClothSpring::type.

Referenced by SIM_cloth_solver_init().

◆ cloth_get_grid_location()

BLI_INLINE void cloth_get_grid_location ( Implicit_Data * data,
float cell_scale,
const float cell_offset[3],
int index,
float x[3],
float v[3] )

Definition at line 790 of file SIM_mass_spring.cc.

References add_v3_v3(), mul_v3_fl(), SIM_mass_spring_get_new_velocity(), SIM_mass_spring_get_position(), and v.

Referenced by cloth_continuum_add_hair_segments().

◆ cloth_get_pressure_weights()

static bool cloth_get_pressure_weights ( ClothModifierData * clmd,
const blender::int3 & vert_tri,
float * r_weights )
static

Definition at line 63 of file SIM_mass_spring.cc.

References ClothModifierData::clothObject, ClothVertex::pressure_factor, ClothModifierData::sim_parms, verts, and ClothSimSettings::vgroup_pressure.

Referenced by cloth_calc_average_pressure(), cloth_calc_force(), cloth_calc_rest_volume(), and cloth_calc_volume().

◆ cloth_record_result()

static void cloth_record_result ( ClothModifierData * clmd,
ImplicitSolverResult * result,
float dt )
static

Definition at line 1230 of file SIM_mass_spring.cc.

References ClothSolverResult::avg_error, ClothSolverResult::avg_iterations, float, ClothSolverResult::max_error, max_ff(), max_ii(), ClothSolverResult::max_iterations, ClothSolverResult::min_error, min_ff(), min_ii(), ClothSolverResult::min_iterations, SIM_SOLVER_SUCCESS, ClothModifierData::solver_result, and ClothSolverResult::status.

Referenced by SIM_cloth_solve().

◆ cloth_setup_constraints()

static void cloth_setup_constraints ( ClothModifierData * clmd)
static

Definition at line 251 of file SIM_mass_spring.cc.

References CLOTH_VERT_FLAG_PINNED, ClothModifierData::clothObject, SIM_mass_spring_add_constraint_ndof0(), SIM_mass_spring_clear_constraints(), v, verts, and ZERO.

Referenced by SIM_cloth_solve().

◆ cloth_solve_collisions()

static void cloth_solve_collisions ( Depsgraph * depsgraph,
Object * ob,
ClothModifierData * clmd,
float step,
float dt )
static

Definition at line 1175 of file SIM_mass_spring.cc.

References Cloth::bvhtree, cloth_bvh_collision(), CLOTH_COLLSETTINGS_FLAG_ENABLED, CLOTH_COLLSETTINGS_FLAG_SELF, CLOTH_VERT_FLAG_PINNED, ClothModifierData::clothObject, ClothModifierData::coll_parms, depsgraph, ClothSimSettings::dt, ClothCollSettings::flags, madd_v3_v3fl(), SIM_mass_spring_get_new_position(), SIM_mass_spring_get_new_velocity(), SIM_mass_spring_set_new_velocity(), SIM_mass_spring_solve_positions(), ClothModifierData::sim_parms, sub_v3_v3v3(), ClothSimSettings::timescale, verts, ClothSimSettings::vgroup_mass, and zero_v3().

Referenced by SIM_cloth_solve().

◆ hair_get_boundbox()

static void hair_get_boundbox ( ClothModifierData * clmd,
blender::float3 & gmin,
blender::float3 & gmax )
static

Definition at line 553 of file SIM_mass_spring.cc.

References ClothModifierData::clothObject, INIT_MINMAX, blender::math::min_max(), SIM_mass_spring_get_motion_state(), and x.

Referenced by cloth_continuum_step().

◆ hair_spring_next()

BLI_INLINE LinkNode * hair_spring_next ( LinkNode * spring_link)

Definition at line 805 of file SIM_mass_spring.cc.

References CLOTH_SPRING_TYPE_STRUCTURAL, ClothSpring::ij, ClothSpring::kl, LinkNode::link, LinkNode::next, next, and ClothSpring::type.

Referenced by cloth_continuum_add_hair_segments().

◆ SIM_cloth_solve()

int SIM_cloth_solve ( Depsgraph * depsgraph,
Object * ob,
float frame,
ClothModifierData * clmd,
ListBase * effectors )

Definition at line 1260 of file SIM_mass_spring.cc.

References BKE_sim_debug_data_clear_category(), cloth_calc_average_acceleration(), cloth_calc_force(), cloth_clear_result(), cloth_continuum_step(), cloth_record_result(), cloth_setup_constraints(), CLOTH_SIMSETTINGS_FLAG_PRESSURE, cloth_solve_collisions(), CLOTH_VERT_FLAG_PINNED, ClothModifierData::clothObject, copy_v3_v3(), DEG_get_evaluated_scene(), depsgraph, ClothSimSettings::dt, ClothSimSettings::flags, ClothSimSettings::fluid_density, ClothModifierData::hairdata, interp_v3_v3v3(), mul_v3_fl(), result, SIM_mass_spring_apply_result(), SIM_mass_spring_clear_forces(), SIM_mass_spring_get_motion_state(), SIM_mass_spring_set_position(), SIM_mass_spring_set_velocity(), SIM_mass_spring_solve_positions(), SIM_mass_spring_solve_velocities(), ClothModifierData::sim_parms, ClothModifierData::solver_result, sub_v3_v3v3(), ClothSimSettings::time_scale, ClothSimSettings::timescale, v, verts, ClothSimSettings::vgroup_mass, and zero_v3().

Referenced by do_step_cloth().

◆ SIM_cloth_solver_free()

void SIM_cloth_solver_free ( ClothModifierData * clmd)

Definition at line 209 of file SIM_mass_spring.cc.

References ClothModifierData::clothObject, and SIM_mass_spring_solver_free().

Referenced by cloth_free_modifier(), and cloth_free_modifier_extern().

◆ SIM_cloth_solver_init()

int SIM_cloth_solver_init ( Object * ob,
ClothModifierData * clmd )

Definition at line 182 of file SIM_mass_spring.cc.

References cloth_count_nondiag_blocks(), ClothModifierData::clothObject, SIM_mass_spring_set_implicit_vertex_mass(), SIM_mass_spring_set_motion_state(), SIM_mass_spring_solver_create(), verts, and ZERO.

Referenced by cloth_from_object().

◆ SIM_cloth_solver_set_positions()

void SIM_cloth_solver_set_positions ( ClothModifierData * clmd)

Definition at line 219 of file SIM_mass_spring.cc.

References ClothModifierData::clothObject, ClothModifierData::hairdata, I3, ClothHairData::rot, SIM_mass_spring_set_motion_state(), SIM_mass_spring_set_rest_transform(), v, and verts.

Referenced by cloth_from_object(), clothModifier_do(), and do_init_cloth().

◆ SIM_cloth_solver_set_volume()

void SIM_cloth_solver_set_volume ( ClothModifierData * clmd)

Definition at line 240 of file SIM_mass_spring.cc.

References cloth_calc_rest_volume(), ClothModifierData::clothObject, and Cloth::initial_mesh_volume.

Referenced by do_init_cloth().

◆ SIM_mass_spring_set_implicit_vertex_mass()

void SIM_mass_spring_set_implicit_vertex_mass ( Implicit_Data * data,
int index,
float mass )

Definition at line 204 of file SIM_mass_spring.cc.

References SIM_mass_spring_set_vertex_mass().

Referenced by do_step_cloth(), and SIM_cloth_solver_init().

Variable Documentation

◆ I3

float I3[3][3] = {{1.0, 0.0, 0.0}, {0.0, 1.0, 0.0}, {0.0, 0.0, 1.0}}
static

Definition at line 35 of file SIM_mass_spring.cc.

Referenced by SIM_cloth_solver_set_positions().

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