\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)
CGAL 4.14 - Surface Mesh
Modules | Classes | Functions
Surface Mesh Reference

Surface_mesh_teaser.png
Mario Botsch, Daniel Sieger, Philipp Moeller, and Andreas Fabri
The surface mesh class provided by this package is an implementation of the halfedge data structure allowing to represent polyhedral surfaces. It is an alternative to the packages Halfedge Data Structures and 3D Polyhedral Surface. The main differences are that it is indexed based and not pointer based, and that the mechanism for adding information to vertices, halfedges, edges, and faces is much simpler and can be used at runtime and not at compile time.
Introduced in: CGAL 4.6
BibTeX: cgal:bsmf-sm-19a
License: GPL

Classified Reference Pages

Classes

Draw a Surface Mesh

Modules

 Draw a Surface Mesh
 Draw.
 

Classes

class  CGAL::Surface_mesh< P >
 This class is a data structure that can be used as halfedge data structure or polyhedral surface. It is an alternative to the classes HalfedgeDS and Polyhedron_3 defined in the packages Halfedge Data Structures and 3D Polyhedral Surface. The main difference is that it is indexed based and not pointer based, and that the mechanism for adding information to vertices, halfedges, edges, and faces is much simpler and done at runtime and not at compile time. When elements are removed, they are only marked as removed, and a garbage collection function must be called to really remove them. More...
 

Functions

template<typename P >
bool CGAL::write_off (std::ostream &os, const Surface_mesh< P > &sm)
 
template<typename P >
bool CGAL::read_off (std::istream &is, Surface_mesh< P > &sm)
 
template<typename P >
Surface_mesh< P > & operator+= (Surface_mesh< P > &sm, const Surface_mesh< P > &other)
 
template<typename P , typename NamedParameters >
bool write_off (std::ostream &os, const Surface_mesh< P > &sm, const NamedParameters &np)
 
template<typename P >
std::ostream & operator<< (std::ostream &os, const Surface_mesh< P > &sm)
 
template<typename P , typename NamedParameters >
bool read_off (std::istream &is, Surface_mesh< P > &sm, NamedParameters np)
 
template<typename P >
std::istream & operator>> (std::istream &is, Surface_mesh< P > &sm)
 

Function Documentation

◆ operator+=()

template<typename P >
Surface_mesh< P > & operator+= ( Surface_mesh< P > &  sm,
const Surface_mesh< P > &  other 
)
related

Inserts other into sm. Shifts the indices of vertices of other by sm.number_of_vertices() + sm.number_of_removed_vertices() and analoguously for halfedges, edges, and faces. Copies entries of all property maps which have the same name in sm and other. that is, property maps which are only in other are ignored. Also copies elements which are marked as removed, and concatenates the freelists of sm and other.

◆ operator
template<typename P >
std::ostream & operator<< ( std::ostream &  os,
const Surface_mesh< P > &  sm 
)
related

This operator calls write_off(std::ostream& os, const CGAL::Surface_mesh& sm).

◆ operator>>()

template<typename P >
std::istream & operator>> ( std::istream &  is,
Surface_mesh< P > &  sm 
)
related

This operator calls read_off(std::istream& is, CGAL::Surface_mesh& sm).

Attention
Up to CGAL 4.10 this operator called sm.clear().

◆ read_off()

template<typename P , typename NamedParameters >
bool read_off ( std::istream &  is,
Surface_mesh< P > &  sm,
NamedParameters  np 
)
related

Extracts the surface mesh from an input stream in Ascii OFF, COFF, NOFF, CNOFF format and appends it to the surface mesh sm. The operator reads the point property as well as "v:normal", "v:color", and "f:color". Vertex texture coordinates are ignored. If an alternative vertex_point map is given through np, then it will be used instead of the default one.

Precondition
operator>>(std::istream&,const P&) must be defined.
The data in the stream must represent a two-manifold. If this is not the case the failbit of is is set and the mesh cleared.

◆ write_off()

template<typename P , typename NamedParameters >
bool write_off ( std::ostream &  os,
const Surface_mesh< P > &  sm,
const NamedParameters &  np 
)
related

Inserts the surface mesh in an output stream in Ascii OFF format. Only the point property is inserted in the stream. If an alternative vertex_point map is given through np, then it will be used instead of the default one.

Precondition
operator<<(std::ostream&,const P&) must be defined.
Note
The precision() of the output stream might not be sufficient depending on the data to be written.