#include <Mesh2D.hpp>

Inheritance diagram for polyfem::mesh::Mesh2D:

Collaboration diagram for polyfem::mesh::Mesh2D:

Public Member Functions
	Mesh2D ()=default

virtual	~Mesh2D ()=default

	Mesh2D (Mesh2D &&)=default

Mesh2D &	operator= (Mesh2D &&)=default

	Mesh2D (const Mesh2D &)=default

Mesh2D &	operator= (const Mesh2D &)=default

bool	is_volume () const override
	checks if mesh is volume

int	n_cells () const override
	number of cells

int	n_cell_vertices (const int c_id) const override
	number of vertices of a cell

bool	is_boundary_face (const int face_global_id) const override
	is face boundary

virtual std::pair< RowVectorNd, int >	edge_node (const Navigation::Index &index, const int n_new_nodes, const int i) const =0

virtual std::pair< RowVectorNd, int >	face_node (const Navigation::Index &index, const int n_new_nodes, const int i, const int j) const =0

RowVectorNd	cell_barycenter (const int index) const override
	cell barycenter

void	compute_face_jacobian (const int el_id, const Eigen::MatrixXd &reference_map, Eigen::MatrixXd &jacobian) const

virtual Navigation::Index	get_index_from_face (int f, int lv=0) const =0

virtual Navigation::Index	switch_vertex (Navigation::Index idx) const =0

virtual Navigation::Index	switch_edge (Navigation::Index idx) const =0

virtual Navigation::Index	switch_face (Navigation::Index idx) const =0

void	barycentric_coords (const RowVectorNd &p, const int el_id, Eigen::MatrixXd &coord) const override
	constructs barycentric coodiantes for a point p.

RowVectorNd	face_barycenter (const int index) const override
	face barycenter

void	compute_element_barycenters (Eigen::MatrixXd &barycenters) const override
	utility for 2d/3d.

void	elements_boxes (std::vector< std::array< Eigen::Vector3d, 2 > > &boxes) const override
	constructs a box around every element (3d cell, 2d face)

Navigation::Index	next_around_face (Navigation::Index idx) const

Navigation::Index	next_around_vertex (Navigation::Index idx) const

void	get_edges (Eigen::MatrixXd &p0, Eigen::MatrixXd &p1) const override
	Get all the edges.

void	get_edges (Eigen::MatrixXd &p0, Eigen::MatrixXd &p1, const std::vector< bool > &valid_elements) const override
	Get all the edges according to valid_elements selection.

Public Member Functions inherited from polyfem::mesh::Mesh
virtual std::unique_ptr< Mesh >	copy () const =0
	Create a copy of the mesh.

virtual	~Mesh ()=default
	Destroy the Mesh object.

	Mesh (Mesh &&)=default
	Construct a new Mesh object.

Mesh &	operator= (Mesh &&)=default
	Copy constructor.

	Mesh (const Mesh &)=default
	Construct a new Mesh object.

Mesh &	operator= (const Mesh &)=default

virtual void	refine (const int n_refinement, const double t)=0
	refine the mesh

int	dimension () const
	utily for dimension

virtual bool	is_conforming () const =0
	if the mesh is conforming

int	n_elements () const
	utitlity to return the number of elements, cells or faces in 3d and 2d

int	n_boundary_elements () const
	utitlity to return the number of boundary elements, faces or edges in 3d and 2d

virtual int	n_faces () const =0
	number of faces

virtual int	n_edges () const =0
	number of edges

virtual int	n_vertices () const =0
	number of vertices

virtual int	n_face_vertices (const int f_id) const =0
	number of vertices of a face

virtual int	edge_vertex (const int e_id, const int lv_id) const =0
	id of the edge vertex

virtual int	face_vertex (const int f_id, const int lv_id) const =0
	id of the face vertex

virtual int	cell_vertex (const int f_id, const int lv_id) const =0
	id of the vertex of a cell

int	element_vertex (const int el_id, const int lv_id) const
	id of the vertex of a element

std::vector< int >	element_vertices (const int el_id) const
	list of vids of an element

int	boundary_element_vertex (const int primitive_id, const int lv_id) const

virtual bool	is_boundary_vertex (const int vertex_global_id) const =0
	is vertex boundary

virtual bool	is_boundary_edge (const int edge_global_id) const =0
	is edge boundary

virtual bool	is_boundary_element (const int element_global_id) const =0
	is cell boundary

virtual bool	save (const std::string &path) const =0

virtual void	attach_higher_order_nodes (const Eigen::MatrixXd &V, const std::vector< std::vector< int > > &nodes)=0
	attach high order nodes

const Eigen::MatrixXi &	orders () const
	order of each element

bool	is_rational () const
	check if curved mesh has rational polynomials elements

void	set_is_rational (const bool in_is_rational)
	Set the is rational object.

virtual void	normalize ()=0
	normalize the mesh

virtual void	compute_elements_tag ()=0
	compute element types, see ElementType

virtual void	update_elements_tag ()
	Update elements types.

virtual double	edge_length (const int gid) const
	edge length

virtual double	quad_area (const int gid) const
	area of a quad face of an hex mesh

virtual double	tri_area (const int gid) const
	area of a tri face of a tet mesh

virtual RowVectorNd	point (const int global_index) const =0
	point coordinates

virtual void	set_point (const int global_index, const RowVectorNd &p)=0
	Set the point.

virtual RowVectorNd	edge_barycenter (const int e) const =0
	edge barycenter

void	edge_barycenters (Eigen::MatrixXd &barycenters) const
	all edges barycenters

void	face_barycenters (Eigen::MatrixXd &barycenters) const
	all face barycenters

void	cell_barycenters (Eigen::MatrixXd &barycenters) const
	all cells barycenters

virtual void	bounding_box (RowVectorNd &min, RowVectorNd &max) const =0
	computes the bbox of the mesh

bool	is_spline_compatible (const int el_id) const
	checks if element is spline compatible

bool	is_cube (const int el_id) const
	checks if element is cube compatible

bool	is_polytope (const int el_id) const
	checks if element is polygon compatible

bool	is_simplex (const int el_id) const
	checks if element is simples compatible

const std::vector< ElementType > &	elements_tag () const
	Returns the elements types.

void	set_tag (const int el, const ElementType type)
	changes the element type

void	compute_node_ids (const std::function< int(const size_t, const RowVectorNd &, bool)> &marker)
	computes boundary selections based on a function

virtual void	load_boundary_ids (const std::string &path)
	loads the boundary selections for a file

virtual void	compute_boundary_ids (const std::function< int(const size_t, const std::vector< int > &, const RowVectorNd &, bool)> &marker)=0
	computes boundary selections based on a function

virtual void	compute_body_ids (const std::function< int(const size_t, const std::vector< int > &, const RowVectorNd &)> &marker)=0
	computes boundary selections based on a function

virtual void	set_boundary_ids (const std::vector< int > &boundary_ids)
	Set the boundary selection from a vector.

virtual void	set_body_ids (const std::vector< int > &body_ids)
	Set the volume sections.

virtual int	get_default_boundary_id (const int primitive) const
	Get the default boundary selection of an element (face in 3d, edge in 2d)

virtual int	get_boundary_id (const int primitive) const
	Get the boundary selection of an element (face in 3d, edge in 2d)

virtual int	get_node_id (const int node_id) const
	Get the boundary selection of a node.

void	update_nodes (const Eigen::VectorXi &in_node_to_node)
	Update the node ids to reorder them.

virtual int	get_body_id (const int primitive) const
	Get the volume selection of an element (cell in 3d, face in 2d)

virtual const std::vector< int > &	get_body_ids () const
	Get the volume selection of all elements (cells in 3d, faces in 2d)

bool	has_node_ids () const
	checks if points selections are available

bool	has_boundary_ids () const
	checks if surface selections are available

virtual bool	has_body_ids () const
	checks if volumes selections are available

const std::vector< double > &	cell_weights (const int cell_index) const
	weights for rational polynomial meshes

void	set_cell_weights (const std::vector< std::vector< double > > &in_cell_weights)
	Set the cell weights for rational polynomial meshes.

virtual void	prepare_mesh ()
	method used to finalize the mesh.

bool	has_poly () const
	checks if the mesh has polytopes

bool	is_simplicial () const
	checks if the mesh is simplicial

bool	is_linear () const
	check if the mesh is linear

std::vector< std::pair< int, int > >	edges () const
	list of sorted edges.

std::vector< std::vector< int > >	faces () const
	list of sorted faces.

std::unordered_map< std::pair< int, int >, size_t, polyfem::utils::HashPair >	edges_to_ids () const
	map from edge (pair of v id) to the id of the edge

std::unordered_map< std::vector< int >, size_t, polyfem::utils::HashVector >	faces_to_ids () const
	map from face (tuple of v id) to the id of the face

const Eigen::VectorXi &	in_ordered_vertices () const
	Order of the input vertices.

const Eigen::MatrixXi &	in_ordered_edges () const
	Order of the input edges.

const Eigen::MatrixXi &	in_ordered_faces () const
	Order of the input edges.

virtual void	append (const Mesh &mesh)
	appends a new mesh to the end of this

void	append (const std::unique_ptr< Mesh > &mesh)
	appends a new mesh to the end of this, utility that takes pointer, calls other one

void	apply_affine_transformation (const MatrixNd &A, const VectorNd &b)
	Apply an affine transformation \(Ax+b\) to the vertex positions \(x\).

Additional Inherited Members
Static Public Member Functions inherited from polyfem::mesh::Mesh
static std::unique_ptr< Mesh >	create (const std::string &path, const bool non_conforming=false)
	factory to build the proper mesh

static std::unique_ptr< Mesh >	create (GEO::Mesh &M, const bool non_conforming=false)
	factory to build the proper mesh

static std::unique_ptr< Mesh >	create (const Eigen::MatrixXd &vertices, const Eigen::MatrixXi &cells, const bool non_conforming=false)
	factory to build the proper mesh

static std::unique_ptr< Mesh >	create (const int dim, const bool non_conforming=false)
	factory to build the proper empty mesh

Protected Member Functions inherited from polyfem::mesh::Mesh
	Mesh ()=default
	Construct a new Mesh object.

virtual bool	load (const std::string &path)=0
	loads a mesh from the path

virtual bool	load (const GEO::Mesh &M)=0
	loads a mesh from a geo mesh

Protected Attributes inherited from polyfem::mesh::Mesh
std::vector< ElementType >	elements_tag_
	list of element types

std::vector< int >	node_ids_
	list of node labels

std::vector< int >	boundary_ids_
	list of surface labels

std::vector< int >	body_ids_
	list of volume labels

Eigen::MatrixXi	orders_
	list of geometry orders, one per cell

bool	is_rational_ = false
	stores if the mesh is rational

std::vector< EdgeNodes >	edge_nodes_
	high-order nodes associates to edges

std::vector< FaceNodes >	face_nodes_
	high-order nodes associates to faces

std::vector< CellNodes >	cell_nodes_
	high-order nodes associates to cells

std::vector< std::vector< double > >	cell_weights_
	weights associates to cells for rational polynomail meshes

Eigen::VectorXi	in_ordered_vertices_
	Order of the input vertices.

Eigen::MatrixXi	in_ordered_edges_
	Order of the input edges.

Eigen::MatrixXi	in_ordered_faces_
	Order of the input faces, TODO: change to std::vector of Eigen::Vector.

Detailed Description

Definition at line 15 of file Mesh2D.hpp.

Constructor & Destructor Documentation

◆ Mesh2D() [1/3]

polyfem::mesh::Mesh2D::Mesh2D ( )

default

◆ ~Mesh2D()

virtual polyfem::mesh::Mesh2D::~Mesh2D ( )

virtualdefault

◆ Mesh2D() [2/3]

polyfem::mesh::Mesh2D::Mesh2D ( Mesh2D && )

default

◆ Mesh2D() [3/3]

polyfem::mesh::Mesh2D::Mesh2D ( const Mesh2D & )

default

Member Function Documentation

◆ barycentric_coords()

void polyfem::mesh::Mesh2D::barycentric_coords	(	const RowVectorNd &	p,
		const int	el_id,
		Eigen::MatrixXd &	coord
	)		const

overridevirtual

constructs barycentric coodiantes for a point p.

WARNING works only for simplices

Parameters

[in]	p	query point
[in]	el_id	element id
[out]	coord	matrix containing the barycentric coodinates

Implements polyfem::mesh::Mesh.

Definition at line 85 of file Mesh2D.cpp.

References get_index_from_face(), polyfem::mesh::Mesh::is_simplex(), next_around_face(), and polyfem::mesh::Mesh::point().

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◆ cell_barycenter()

RowVectorNd polyfem::mesh::Mesh2D::cell_barycenter ( const int c ) const

inlineoverridevirtual

cell barycenter

Parameters

[in] c global cell index

Returns: cell barycenter

Implements polyfem::mesh::Mesh.

Definition at line 39 of file Mesh2D.hpp.

◆ compute_element_barycenters()

void polyfem::mesh::Mesh2D::compute_element_barycenters ( Eigen::MatrixXd & barycenters ) const

inlineoverridevirtual

utility for 2d/3d.

In 2d it returns face_barycenters, in 3d it returns cell_barycenters

Parameters

[out] barycenters the barycenters

Implements polyfem::mesh::Mesh.

Definition at line 57 of file Mesh2D.hpp.

References polyfem::mesh::Mesh::face_barycenters().

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◆ compute_face_jacobian()

void polyfem::mesh::Mesh2D::compute_face_jacobian	(	const int	el_id,
		const Eigen::MatrixXd &	reference_map,
		Eigen::MatrixXd &	jacobian
	)		const

Definition at line 101 of file Mesh2D.cpp.

References get_index_from_face(), polyfem::mesh::Mesh::is_simplex(), next_around_face(), and polyfem::mesh::Mesh::point().

Referenced by polyfem::solver::AMIPSForm::AMIPSForm(), and polyfem::State::set_materials().

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◆ edge_node()

virtual std::pair< RowVectorNd, int > polyfem::mesh::Mesh2D::edge_node	(	const Navigation::Index &	index,
		const int	n_new_nodes,
		const int	i
	)		const

pure virtual

Implemented in polyfem::mesh::CMesh2D, and polyfem::mesh::NCMesh2D.

Referenced by polyfem::mesh::MeshNodes::node_ids_from_edge().

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◆ elements_boxes()

void polyfem::mesh::Mesh2D::elements_boxes ( std::vector< std::array< Eigen::Vector3d, 2 > > & boxes ) const

overridevirtual

constructs a box around every element (3d cell, 2d face)

Parameters

[out] boxes axis aligned bounding boxes

Implements polyfem::mesh::Mesh.

Definition at line 121 of file Mesh2D.cpp.

References get_index_from_face(), polyfem::mesh::Mesh::n_elements(), polyfem::mesh::Mesh::n_face_vertices(), next_around_face(), and polyfem::mesh::Mesh::point().

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◆ face_barycenter()

RowVectorNd polyfem::mesh::Mesh2D::face_barycenter ( const int f ) const

overridevirtual

face barycenter

Parameters

[in] f global face index

Returns: face barycenter

Implements polyfem::mesh::Mesh.

Definition at line 69 of file Mesh2D.cpp.

References get_index_from_face(), polyfem::mesh::Mesh::n_face_vertices(), polyfem::mesh::Mesh::n_vertices(), next_around_face(), polyfem::mesh::Mesh::point(), and polyfem::mesh::Navigation::Index::vertex.

Referenced by polyfem::mesh::CMesh2D::compute_body_ids(), polyfem::mesh::NCMesh2D::compute_body_ids(), and polyfem::solver::ElasticVariableToSimulation::inverse_eval().

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◆ face_node()

virtual std::pair< RowVectorNd, int > polyfem::mesh::Mesh2D::face_node	(	const Navigation::Index &	index,
		const int	n_new_nodes,
		const int	i,
		const int	j
	)		const