#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"

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()

void cloth_calc_average_acceleration	(	ClothModifierData *	clmd,
		float	dt )

static

Definition at line 1145 of file SIM_mass_spring.cc.

References add_v3_v3(), Cloth::average_acceleration, ClothModifierData::clothObject, data, i, Cloth::implicit, interp_v3_v3v3(), mul_v3_fl(), Cloth::mvert_num, 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()

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

static

Definition at line 155 of file SIM_mass_spring.cc.

References cloth_get_pressure_weights(), ClothModifierData::clothObject, data, i, Cloth::implicit, Cloth::primitive_num, SIM_tri_area(), and Cloth::vert_tris.

Referenced by cloth_calc_force().

◆ cloth_calc_force()

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

static

Definition at line 566 of file SIM_mass_spring.cc.

Referenced by SIM_cloth_solve().

◆ cloth_calc_helper_forces()

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 276 of file SIM_mass_spring.cc.

References add_v3_v3(), cloth_calc_helper_forces(), CLOTH_SPRING_TYPE_SHEAR, CLOTH_SPRING_TYPE_STRUCTURAL, copy_v3_v3(), cos, e, ELEM, float, ClothVertex::goal, i, ClothSpring::ij, ClothSpring::kl, l, len, len_squared_v3v3(), len_v3v3(), LinkNode::link, ClothVertex::mass, MEM_calloc_arrayN(), MEM_freeN(), mul_v3_fl(), Cloth::mvert_num, LinkNode::next, normalize_v3(), ClothSpring::restlen, Cloth::springs, sub_v3_v3v3(), ClothVertex::tv, ClothVertex::tx, ClothSpring::type, v2, and Cloth::verts.

Referenced by cloth_calc_helper_forces().

◆ cloth_calc_pressure_gradient()

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

static

Definition at line 83 of file SIM_mass_spring.cc.

References ClothModifierData::clothObject, data, dot_v3v3(), i, Cloth::implicit, Cloth::mvert_num, and SIM_mass_spring_get_position().

Referenced by cloth_calc_force().

◆ cloth_calc_rest_volume()

float cloth_calc_rest_volume ( ClothModifierData * clmd )

static

Definition at line 126 of file SIM_mass_spring.cc.

References cloth_get_pressure_weights(), ClothModifierData::clothObject, ClothModifierData::hairdata, i, Cloth::primitive_num, v, Cloth::vert_tris, Cloth::verts, 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 355 of file SIM_mass_spring.cc.

References ClothSpring::ang_stiffness, 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, BLI_INLINE, 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(), data, fabsf, ClothSimSettings::flags, ClothSpring::flags, ClothSpring::ij, Cloth::implicit, ClothSimSettings::internal_compression, ClothSimSettings::internal_tension, ClothSpring::kl, ClothSpring::la, ClothSpring::lb, ClothSpring::lin_stiffness, ClothSimSettings::max_bend, ClothSimSettings::max_compression, ClothSimSettings::max_internal_compression, ClothSimSettings::max_internal_tension, ClothSimSettings::max_sewing, ClothSimSettings::max_shear, ClothSimSettings::max_tension, ClothSpring::mn, ClothSpring::pa, ClothSpring::pb, ClothSpring::restang, ClothSpring::restlen, 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, ClothSpring::target, ClothSimSettings::tension, ClothSimSettings::tension_damp, ClothSpring::type, and v.

Referenced by cloth_calc_force().

◆ cloth_calc_volume()

float cloth_calc_volume ( ClothModifierData * clmd )

static

Definition at line 98 of file SIM_mass_spring.cc.

References cloth_get_pressure_weights(), ClothModifierData::clothObject, data, ClothModifierData::hairdata, i, Cloth::implicit, Cloth::primitive_num, SIM_tri_tetra_volume_signed_6x(), and Cloth::vert_tris.

Referenced by cloth_calc_force().

◆ cloth_clear_result()

void cloth_clear_result ( ClothModifierData * clmd )

static

Definition at line 1214 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()

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