Input/Output Functions

The free functions that can be used to read and write meshes.

Functions
template<class C3T3 >
bool	CGAL::IO::save_binary_file (std::ostream &os, const C3T3 &c3t3)
	outputs a mesh complex to the CGAL binary file format (.binary.cgal).
template<class C3T3 >
bool	CGAL::IO::load_binary_file (std::istream &is, C3T3 &c3t3)
	loads a mesh complex from a file written in CGAL binary file format (.binary.cgal).
template<class C3T3 >
void	CGAL::IO::output_to_medit (std::ostream &os, const C3T3 &c3t3, bool rebind, bool show_patches)
	outputs a mesh complex to the medit (.mesh) file format. See [1] for a comprehensive description of this file format.
template<typename T3 , typename NamedParameters = parameters::Default_named_parameters>
void	CGAL::IO::write_MEDIT (std::ostream &os, const T3 &t3, const NamedParameters &np=parameters::default_values())
	outputs a mesh complex to the medit (.mesh) file format.
template<typename T3 , typename CornerIndex , typename CurveIndex , typename NamedParameters = parameters::Default_named_parameters>
void	CGAL::IO::write_MEDIT (std::ostream &os, const CGAL::Mesh_complex_3_in_triangulation_3< T3, CornerIndex, CurveIndex > &c3t3, const NamedParameters &np=parameters::default_values())
	outputs a mesh complex to the medit (.mesh) file format.
template<typename T3 , typename NamedParameters = CGAL::parameters::Default_named_parameters>
bool	CGAL::IO::read_MEDIT (std::istream &in, T3 &t3, const NamedParameters &np=parameters::default_values())
	reads a mesh complex written in the medit (.mesh) file format.

Function Documentation

load_binary_file()

template<class C3T3 >

bool CGAL::IO::load_binary_file	(	std::istream &	is,
		C3T3 &	c3t3
	)

#include <CGAL/IO/File_binary_mesh_3.h>

loads a mesh complex from a file written in CGAL binary file format (.binary.cgal).

Template Parameters

C3T3	Type of mesh complex, model of MeshComplex_3InTriangulation_3

Parameters

is	the input stream, opened in binary mode
c3t3	the mesh complex

See also

CGAL::IO::save_binary_file()

output_to_medit()

template<class C3T3 >

void CGAL::IO::output_to_medit	(	std::ostream &	os,
		const C3T3 &	c3t3,
		bool	rebind,
		bool	show_patches
	)

#include <CGAL/IO/File_medit.h>

outputs a mesh complex to the medit (.mesh) file format. See [1] for a comprehensive description of this file format.

Deprecated:

This function is deprecated. Users should instead use CGAL::IO::write_MEDIT()

Parameters

os	the output stream
c3t3	the mesh complex
rebind	if true, labels of cells are rebinded into [1..nb_of_labels]
show_patches	if true, patches are labeled with different labels than cells. If false, each surface facet is written twice, using the label of each adjacent cell.

See also

Medit File Format

read_MEDIT()

template<typename T3 , typename NamedParameters = CGAL::parameters::Default_named_parameters>

bool CGAL::IO::read_MEDIT	(	std::istream &	in,
		T3 &	t3,
		const NamedParameters &	np = parameters::default_values()
	)

#include <CGAL/IO/File_medit.h>

reads a mesh complex written in the medit (.mesh) file format.

See [1] for a comprehensive description of this file format.

Template Parameters

T3	can be instantiated with any 3D triangulation of CGAL provided that its vertex and cell base class are models of the concepts MeshVertexBase_3 and MeshCellBase_3, respectively.
NamedParameters	a sequence of Named Parameters

Parameters

in	the input stream
t3	the triangulation
np	optional Named Parameters described below

Optional Named Parameters

verbose indicates whether output warnings and error messages should be printed or not. Type: Boolean Default: false
allow_non_manifold allows the construction of a triangulation with non-manifold edges and non manifold vertices. The triangulation is invalid if this situation is met, so it should be used only in advanced cases, and the triangulation will be hardly usable. Type: bool Default: false

Returns

true if the connectivity of the triangulation could be built consistently from in, and false if the triangulation is empty, or if the connectivity of t3 could not be built. If false is returned, t3 is empty when the function returns.

This function reads the data about vertices, surface facets, and triangulation cells from in, and builds a valid T3 from it.

Note that a valid 3D triangulation of CGAL must have a valid data structure (see TriangulationDataStructure_3), positively oriented cells, and cover the geometric convex hull of all points in t3.

Examples

SMDS_3/c3t3_example.cpp.

save_binary_file()

template<class C3T3 >

bool CGAL::IO::save_binary_file	(	std::ostream &	os,
		const C3T3 &	c3t3
	)

#include <CGAL/IO/File_binary_mesh_3.h>

outputs a mesh complex to the CGAL binary file format (.binary.cgal).

Template Parameters

C3T3	Type of mesh complex, model of MeshComplex_3InTriangulation_3

Parameters

os	the output stream, opened in binary mode
c3t3	the mesh complex

See also

CGAL::IO::load_binary_file()

write_MEDIT() [1/2]

template<typename T3 , typename CornerIndex , typename CurveIndex , typename NamedParameters = parameters::Default_named_parameters>

void CGAL::IO::write_MEDIT	(	std::ostream &	os,
		const CGAL::Mesh_complex_3_in_triangulation_3< T3, CornerIndex, CurveIndex > &	c3t3,
		const NamedParameters &	np = parameters::default_values()
	)

#include <CGAL/IO/File_medit.h>

outputs a mesh complex to the medit (.mesh) file format.

See [1] for a comprehensive description of this file format.

Template Parameters

T3	can be instantiated with any 3D triangulation of CGAL provided that its vertex and cell base class are models of the concepts MeshVertexBase_3 and MeshCellBase_3, respectively.
CornerIndex	is the type of the indices for corners
CurveIndex	is the type of the indices for curves
NamedParameters	a sequence of Named Parameters

Parameters

os	the output stream
c3t3	the mesh complex
np	an optional sequence of Named Parameters among the ones listed below

Optional Named Parameters

all_cells If true, all the cells in t3 are written in os, whether they belong to the complex or not. Otherwise, only the cells c for which c->subdomain_index() != Subdomain_index() are written. Type: Boolean Default: true Extra: If the complex does not form a topological sphere, this parameter must be set to true for the file to be readable by read_MEDIT(). Otherwise the underlying triangulation data structure will not be valid.
all_vertices If true, all the vertices in t3 are written in os. Otherwise, only the vertices that belong to a cell c for which c->subdomain_index() != Subdomain_index() are written Type: Boolean Default: true Extra: If all_cells is true, the value of this parameter is ignored and all vertices are written in os. If the complex does not form a topological sphere, it must be set to true for the file to be readable by read_MEDIT(). Otherwise the underlying triangulation data structure will not be valid.
rebind_labels If true, labels of cells are rebinded into [1..nb_of_labels] Type: Boolean Default: false
show_patches If true, patches are labeled with different labels than cells. If false, each surface facet is written twice, using the label of each adjacent cell. Type: Boolean Default: true

See also

Medit File Format

write_MEDIT() [2/2]

template<typename T3 , typename NamedParameters = parameters::Default_named_parameters>

void CGAL::IO::write_MEDIT	(	std::ostream &	os,
		const T3 &	t3,
		const NamedParameters &	np = parameters::default_values()
	)

#include <CGAL/IO/File_medit.h>

outputs a mesh complex to the medit (.mesh) file format.

See [1] for a comprehensive description of this file format.

Template Parameters

T3	can be instantiated with any 3D triangulation of CGAL provided that its vertex and cell base class are models of the concepts SimplicialMeshVertexBase_3 and SimplicialMeshCellBase_3, respectively.
NamedParameters	a sequence of Named Parameters

Parameters

os	the output stream
t3	the triangulation
np	an optional sequence of Named Parameters among the ones listed below

Optional Named Parameters

all_cells If true, all the cells in t3 are written in os, whether they belong to the complex or not. Otherwise, only the cells c for which c->subdomain_index() != Subdomain_index() are written. Type: Boolean Default: true Extra: This parameter must be set to true for the file to be readable by read_MEDIT().
all_vertices If true, all the finite vertices in t3 are written in os. Otherwise, only the vertices that belong to a cell c for which c->subdomain_index() != Subdomain_index() are written Type: Boolean Default: true Extra: If all_cells is true, the value of this parameter is ignored and all vertices are written in os. It must be set to true for the file to be readable by read_MEDIT().
rebind_labels If true, labels of cells are rebinded into [1..nb_of_labels] Type: Boolean Default: false
show_patches If true, patches are labeled with different labels than cells. If false, each surface facet is written twice, using the label of each adjacent cell. Type: Boolean Default: true

See also

Medit File Format

Examples

SMDS_3/c3t3_example.cpp, and SMDS_3/tetrahedron_soup_to_c3t3_example.cpp.