Form representing body forces. More...

#include <PressureForm.hpp>

Inheritance diagram for polyfem::solver::PressureForm:

Collaboration diagram for polyfem::solver::PressureForm:

Public Member Functions
	PressureForm (const int ndof, const std::vector< mesh::LocalBoundary > &local_pressure_boundary, const std::unordered_map< int, std::vector< mesh::LocalBoundary > > &local_pressure_cavity, const std::vector< int > &dirichlet_nodes, const int n_boundary_samples, const assembler::PressureAssembler &pressure_assembler, const bool is_time_dependent)
	Construct a new Body Form object.

std::string	name () const override

void	update_quantities (const double t, const Eigen::VectorXd &x) override
	Update time dependent quantities.

void	force_shape_derivative (const int n_verts, const double t, const Eigen::MatrixXd &x, const Eigen::MatrixXd &adjoint, Eigen::VectorXd &term)
	Compute the derivative of the force wrt vertex positions, then multiply the resulting matrix with adjoint_sol.

double	force_pressure_derivative (const int n_verts, const double t, const int pressure_boundary_id, const Eigen::MatrixXd &x, const Eigen::MatrixXd &adjoint)
	Compute the derivative of the force wrt vertex positions, then multiply the resulting matrix with adjoint_sol.

Public Member Functions inherited from polyfem::solver::Form
virtual	~Form ()

virtual void	init (const Eigen::VectorXd &x)
	Initialize the form.

virtual double	value (const Eigen::VectorXd &x) const
	Compute the value of the form multiplied with the weigth.

Eigen::VectorXd	value_per_element (const Eigen::VectorXd &x) const
	Compute the value of the form multiplied with the weigth.

virtual void	first_derivative (const Eigen::VectorXd &x, Eigen::VectorXd &gradv) const
	Compute the first derivative of the value wrt x multiplied with the weigth.

void	second_derivative (const Eigen::VectorXd &x, StiffnessMatrix &hessian) const
	Compute the second derivative of the value wrt x multiplied with the weigth.

virtual bool	is_step_valid (const Eigen::VectorXd &x0, const Eigen::VectorXd &x1) const
	Determine if a step from solution x0 to solution x1 is allowed.

virtual double	max_step_size (const Eigen::VectorXd &x0, const Eigen::VectorXd &x1) const
	Determine the maximum step size allowable between the current and next solution.

virtual void	line_search_begin (const Eigen::VectorXd &x0, const Eigen::VectorXd &x1)
	Initialize variables used during the line search.

virtual void	line_search_end ()
	Clear variables used during the line search.

virtual void	post_step (const polysolve::nonlinear::PostStepData &data)
	Update fields after a step in the optimization.

virtual void	solution_changed (const Eigen::VectorXd &new_x)
	Update cached fields upon a change in the solution.

virtual void	init_lagging (const Eigen::VectorXd &x)
	Initialize lagged fields TODO: more than one step.

virtual void	update_lagging (const Eigen::VectorXd &x, const int iter_num)
	Update lagged fields.

virtual int	max_lagging_iterations () const
	Get the maximum number of lagging iteration allowable.

virtual bool	uses_lagging () const
	Does this form require lagging?

void	set_project_to_psd (bool val)
	Set project to psd.

bool	is_project_to_psd () const
	Get if the form's second derivative is projected to psd.

void	enable ()
	Enable the form.

void	disable ()
	Disable the form.

void	set_enabled (const bool enabled)
	Set if the form is enabled.

bool	enabled () const
	Determine if the form is enabled.

virtual double	weight () const
	Get the form's multiplicative constant weight.

void	set_weight (const double weight)
	Set the form's multiplicative constant weight.

virtual void	set_apply_DBC (const Eigen::VectorXd &x, bool apply_DBC)
	Set if the Dirichlet boundary conditions should be enforced.

virtual bool	is_step_collision_free (const Eigen::VectorXd &x0, const Eigen::VectorXd &x1) const
	Checks if the step is collision free.

void	set_output_dir (const std::string &output_dir)

Protected Member Functions
double	value_unweighted (const Eigen::VectorXd &x) const override
	Compute the value of the body force form.

void	first_derivative_unweighted (const Eigen::VectorXd &x, Eigen::VectorXd &gradv) const override
	Compute the first derivative of the value wrt x.

void	second_derivative_unweighted (const Eigen::VectorXd &x, StiffnessMatrix &hessian) const override
	Compute the second derivative of the value wrt x.

Protected Member Functions inherited from polyfem::solver::Form
std::string	resolve_output_path (const std::string &path) const

virtual Eigen::VectorXd	value_per_element_unweighted (const Eigen::VectorXd &x) const
	Compute the value of the form multiplied per element.

Private Attributes
double	t_
	Current time.

const int	ndof_
	Number of degrees of freedom.

const std::vector< mesh::LocalBoundary > &	local_pressure_boundary_

const std::unordered_map< int, std::vector< mesh::LocalBoundary > > &	local_pressure_cavity_

const std::vector< int > &	dirichlet_nodes_

const int	n_boundary_samples_

const assembler::PressureAssembler &	pressure_assembler_
	Reference to the pressure assembler.

Additional Inherited Members
Protected Attributes inherited from polyfem::solver::Form
bool	project_to_psd_ = false
	If true, the form's second derivative is projected to be positive semidefinite.

double	weight_ = 1
	weight of the form (e.g., AL penalty weight or Δt²)

bool	enabled_ = true
	If true, the form is enabled.

std::string	output_dir_

Detailed Description

Form representing body forces.

Definition at line 14 of file PressureForm.hpp.

Constructor & Destructor Documentation

◆ PressureForm()

polyfem::solver::PressureForm::PressureForm	(	const int	ndof,
		const std::vector< mesh::LocalBoundary > &	local_pressure_boundary,
		const std::unordered_map< int, std::vector< mesh::LocalBoundary > > &	local_pressure_cavity,
		const std::vector< int > &	dirichlet_nodes,
		const int	n_boundary_samples,
		const assembler::PressureAssembler &	pressure_assembler,
		const bool	is_time_dependent
	)

Construct a new Body Form object.

Parameters

state	Reference to the simulation state
pressure_assembler	Reference to the pressure assembler

Definition at line 19 of file PressureForm.cpp.

References t_.

Member Function Documentation

◆ first_derivative_unweighted()

void polyfem::solver::PressureForm::first_derivative_unweighted	(	const Eigen::VectorXd &	x,
		Eigen::VectorXd &	gradv
	)		const

overrideprotectedvirtual

Compute the first derivative of the value wrt x.

Parameters

[in]	x	Vector containing the current solution
[out]	gradv	Output gradient of the value wrt x

Implements polyfem::solver::Form.

Definition at line 43 of file PressureForm.cpp.

References polyfem::assembler::PressureAssembler::compute_cavity_energy_grad(), polyfem::assembler::PressureAssembler::compute_energy_grad(), dirichlet_nodes_, local_pressure_boundary_, local_pressure_cavity_, n_boundary_samples_, pressure_assembler_, t_, and x.

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◆ force_pressure_derivative()

double polyfem::solver::PressureForm::force_pressure_derivative	(	const int	n_verts,
		const double	t,
		const int	pressure_boundary_id,
		const Eigen::MatrixXd &	x,
		const Eigen::MatrixXd &	adjoint
	)

Compute the derivative of the force wrt vertex positions, then multiply the resulting matrix with adjoint_sol.

Parameters

[in]	n_verts	Number of vertices
[in]	x	Current solution
[in]	adjoint	Current adjoint solution
[out]	term	Derivative of force multiplied by the adjoint

Definition at line 78 of file PressureForm.cpp.

References polyfem::assembler::PressureAssembler::compute_grad_volume_id(), dirichlet_nodes_, local_pressure_boundary_, n_boundary_samples_, pressure_assembler_, and x.

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◆ force_shape_derivative()

void polyfem::solver::PressureForm::force_shape_derivative	(	const int	n_verts,
		const double	t,
		const Eigen::MatrixXd &	x,
		const Eigen::MatrixXd &	adjoint,
		Eigen::VectorXd &	term
	)

Compute the derivative of the force wrt vertex positions, then multiply the resulting matrix with adjoint_sol.

Parameters

[in]	n_verts	Number of vertices
[in]	x	Current solution
[in]	adjoint	Current adjoint solution
[out]	term	Derivative of force multiplied by the adjoint

Definition at line 67 of file PressureForm.cpp.

References polyfem::assembler::PressureAssembler::compute_force_jacobian(), dirichlet_nodes_, local_pressure_boundary_, n_boundary_samples_, pressure_assembler_, and x.

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◆ name()

std::string polyfem::solver::PressureForm::name ( ) const

inlineoverridevirtual

Implements polyfem::solver::Form.

Definition at line 28 of file PressureForm.hpp.

◆ second_derivative_unweighted()

void polyfem::solver::PressureForm::second_derivative_unweighted	(	const Eigen::VectorXd &	x,
		StiffnessMatrix &	hessian
	)		const

overrideprotectedvirtual

Compute the second derivative of the value wrt x.

Parameters

[in]	x	Current solution
[out]	hessian	Output Hessian of the value wrt x

Implements polyfem::solver::Form.

Definition at line 53 of file PressureForm.cpp.

References polyfem::assembler::PressureAssembler::compute_cavity_energy_hess(), polyfem::assembler::PressureAssembler::compute_energy_hess(), dirichlet_nodes_, local_pressure_boundary_, local_pressure_cavity_, n_boundary_samples_, pressure_assembler_, polyfem::solver::Form::project_to_psd_, t_, and x.

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◆ update_quantities()

void polyfem::solver::PressureForm::update_quantities	(	const double	t,
		const Eigen::VectorXd &	x
	)

overridevirtual

Update time dependent quantities.

Parameters

t	New time
x	Solution at time t

Reimplemented from polyfem::solver::Form.

Definition at line 62 of file PressureForm.cpp.

References t_.

◆ value_unweighted()

double polyfem::solver::PressureForm::value_unweighted ( const Eigen::VectorXd & x ) const

overrideprotectedvirtual

Compute the value of the body force form.

Parameters

x	Current solution

Returns: Value of the body force form

Implements polyfem::solver::Form.

Definition at line 36 of file PressureForm.cpp.

References polyfem::assembler::PressureAssembler::compute_cavity_energy(), polyfem::assembler::PressureAssembler::compute_energy(), local_pressure_boundary_, local_pressure_cavity_, n_boundary_samples_, pressure_assembler_, t_, and x.

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Member Data Documentation

◆ dirichlet_nodes_

const std::vector<int>& polyfem::solver::PressureForm::dirichlet_nodes_

private

Definition at line 82 of file PressureForm.hpp.

Referenced by first_derivative_unweighted(), force_pressure_derivative(), force_shape_derivative(), and second_derivative_unweighted().

◆ local_pressure_boundary_

const std::vector<mesh::LocalBoundary>& polyfem::solver::PressureForm::local_pressure_boundary_

private

Definition at line 80 of file PressureForm.hpp.

Referenced by first_derivative_unweighted(), force_pressure_derivative(), force_shape_derivative(), second_derivative_unweighted(), and value_unweighted().

◆ local_pressure_cavity_

const std::unordered_map<int, std::vector<mesh::LocalBoundary> >& polyfem::solver::PressureForm::local_pressure_cavity_

private

Definition at line 81 of file PressureForm.hpp.

Referenced by first_derivative_unweighted(), second_derivative_unweighted(), and value_unweighted().

◆ n_boundary_samples_

const int polyfem::solver::PressureForm::n_boundary_samples_

private

Definition at line 83 of file PressureForm.hpp.

Referenced by first_derivative_unweighted(), force_pressure_derivative(), force_shape_derivative(), second_derivative_unweighted(), and value_unweighted().

◆ ndof_

const int polyfem::solver::PressureForm::ndof_

private

Number of degrees of freedom.

Definition at line 78 of file PressureForm.hpp.

◆ pressure_assembler_

const assembler::PressureAssembler& polyfem::solver::PressureForm::pressure_assembler_

private

Reference to the pressure assembler.

Definition at line 85 of file PressureForm.hpp.

Referenced by first_derivative_unweighted(), force_pressure_derivative(), force_shape_derivative(), second_derivative_unweighted(), and value_unweighted().

◆ t_

double polyfem::solver::PressureForm::t_

private

Current time.

Definition at line 77 of file PressureForm.hpp.

Referenced by first_derivative_unweighted(), PressureForm(), second_derivative_unweighted(), update_quantities(), and value_unweighted().

The documentation for this class was generated from the following files:

src/polyfem/solver/forms/PressureForm.hpp
src/polyfem/solver/forms/PressureForm.cpp

Public Member Functions

Protected Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ PressureForm()

Member Function Documentation

◆ first_derivative_unweighted()

◆ force_pressure_derivative()

◆ force_shape_derivative()

◆ name()

◆ second_derivative_unweighted()

◆ update_quantities()

◆ value_unweighted()

Member Data Documentation

◆ dirichlet_nodes_

◆ local_pressure_boundary_

◆ local_pressure_cavity_

◆ n_boundary_samples_

◆ ndof_

◆ pressure_assembler_

◆ t_