The functions to work with the 3D mesh data structures.

Functions
template<class C3T3 , class TriangleMesh , typename NamedParameters = parameters::Default_named_parameters>
void	CGAL::facets_in_complex_3_to_triangle_mesh (const C3T3 &c3t3, TriangleMesh &tmesh, const NamedParameters &np=parameters::default_values())
	builds a `TriangleMesh` from the surface facets, with a consistent orientation at the interface of two subdomains. More...

template<typename Triangulation , typename TetrahedronRange >
Triangulation	CGAL::tetrahedron_soup_to_triangulation_3 (const TetrahedronRange &tets)
	builds a 3D triangulation from a soup of tetrahedra. More...

template<typename Triangulation , typename PointRange , typename TetrahedronRange , typename NamedParameters = parameters::Default_named_parameters>
Triangulation	CGAL::tetrahedron_soup_to_triangulation_3 (const PointRange &points, const TetrahedronRange &tets, const NamedParameters &np=parameters::default_values())
	builds a 3D triangulation from a soup of tetrahedra. More...

Function Documentation

◆ facets_in_complex_3_to_triangle_mesh()

template<class C3T3 , class TriangleMesh , typename NamedParameters = parameters::Default_named_parameters>

void CGAL::facets_in_complex_3_to_triangle_mesh	(	const C3T3 &	c3t3,
		TriangleMesh &	tmesh,
		const NamedParameters &	np = `parameters::default_values()`
	)

#include <CGAL/facets_in_complex_3_to_triangle_mesh.h>

builds a TriangleMesh from the surface facets, with a consistent orientation at the interface of two subdomains.

This function exports the surface as a TriangleMesh and appends it to tmesh, using orient_polygon_soup().

Template Parameters

C3T3	a model of `MeshComplexWithFeatures_3InTriangulation_3`.
TriangleMesh	a model of `MutableFaceGraph` with an internal point property map. The point type must be compatible with the one used in `C3T3`.
NamedParameters	a sequence of Named Parameters

Parameters

c3t3	an instance of `C3T3`
tmesh	an instance of `TriangleMesh`
np	an optional sequence of Named Parameters among the ones listed below

Optional Named Parameters

a property map with the patch id's associated to the faces of faces(tmesh)
Type: a class model of ReadWritePropertyMap with boost::graph_traits<TriangleMesh>::face_descriptor as key type and the desired property, model of CopyConstructible and LessThanComparable, and compatible with the Surface_patch_index type of C3T3 as value type.
Default: If not provided, faces patch ids are ignored.

template<typename Triangulation , typename TetrahedronRange >

Triangulation CGAL::tetrahedron_soup_to_triangulation_3 ( const TetrahedronRange & tets )

#include <CGAL/tetrahedron_soup_to_triangulation_3.h>

builds a 3D triangulation from a soup of tetrahedra.

Template Parameters

TetrahedronRange	a model of `Range` whose value type is a `Tetrahedron_3`. The point type of the tetrahedra must be convertible to `Triangulation::Point`
Triangulation	a 3D triangulation class that has a vertex base model of `SimplicialMeshVertexBase_3` and a cell base model of `SimplicialMeshCellBase_3`

Parameters

tets	the set of finite tetrahedra of a valid CGAL triangulation. Each element in the range is the geometric description of the corresponding cell in the triangulation.

Postcondition: the output triangulation must be a triangulation of the convex hull of tets

template<typename Triangulation , typename PointRange , typename TetrahedronRange , typename NamedParameters = parameters::Default_named_parameters>

Triangulation CGAL::tetrahedron_soup_to_triangulation_3	(	const PointRange &	points,
		const TetrahedronRange &	tets,
		const NamedParameters &	np = `parameters::default_values()`
	)

#include <CGAL/tetrahedron_soup_to_triangulation_3.h>

builds a 3D triangulation from a soup of tetrahedra.

Template Parameters

PointRange	a model of the concept `RandomAccessContainer` whose value type is the point type. The point type must be convertible to `Triangulation::Point`.
TetrahedronRange	a model of the concept `RandomAccessContainer` whose value type is a model of the concept `RandomAccessContainer` whose value type is `std::size_t`
Triangulation	a 3D triangulation class that has a vertex base model of `MeshVertexBase_3` and a cell base model of `MeshCellBase_3`
NamedParameters	a sequence of Named Parameters

Parameters

points	points of the soup of tetrahedra
tets	the set of finite tetrahedra of a valid CGAL triangulation. Each element in the range describes a tetrahedron using the indices of the points in `points`. It must describe a non self-intersecting set of tetrahedra, that cover the convex hull of the corresponding point set. The tetrahedra must form a valid triangulation with each pair of neighboring cells sharing exactly one triangle. Combinatorial validity and validity of the geometric embedding are required.
np	an optional sequence of Named Parameters among the ones listed below

Optional Named Parameters

each element in the range describes a surface facet using the indices of points in points (indices 0 to 2), and the associated Surface_patch_index (index 3)
Type: a class model of AssociativeContainer whose key type is model of RandomAccessContainer containing int and mapped type is Tr::Cell::Surface_patch_index
Default: an empty boost::unordered_map<std::array<int, 3>, typename Tr::Cell::Surface_patch_index>
Extra: to avoid copies of large data sets, this parameter can be passed using std::cref

each element in the range gives the Triangulation::Cell::Subdomain_index corresponding to the tetrahedron (cell) of same index in tets
Type: a class model of RandomAccessContainer whose value type is Triangulation::Cell::Subdomain_index
Default: each finite cell of the output triangulation is set to have 1 as Subdomain_index
Extra: to avoid copies of large data sets, this parameter can be passed using std::cref

Postcondition: the output triangulation must be a triangulation of the convex hull of points; is_valid() returns true for the returned triangulation

See also: CGAL::Polygon_mesh_processing::polygon_soup_to_polygon_mesh(); SMDS_3/tetrahedron_soup_to_c3t3_example.cpp