CGAL 6.1 - Triangulated Surface Mesh Skeletonization

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Modules | Classes | Functions
Reference Manual

##

Xiang Gao, Sébastien Loriot, and Andrea Tagliasacchi
This package provides a (1D) curve skeleton extraction algorithm for a triangulated polygonal mesh without borders based on the mean curvature flow. The particularity of this skeleton is that it captures the topology of the input. For each skeleton vertex one can obtain its location and its corresponding vertices from the input mesh. The code is generic and works with any model of the `FaceListGraph` concept.
Introduced in: CGAL 4.7
Depends on: CGAL and Solvers
BibTeX: cgal:glt-tsms-25b
License: GPL
Windows Demo: CGAL Lab

## Classified Reference Pages

## Concepts

- `MeanCurvatureSkeletonizationTraits`
- `NormalEquationSparseLinearAlgebraTraits_d`

## Classes

- `CGAL::Mean_curvature_flow_skeletonization`

## Modules
| Concepts

## Classes
class | CGAL::Mean_curvature_flow_skeletonization< TriangleMesh, Traits_, VertexPointMap_, SolverTraits_ >
| Function object that enables to extract the mean curvature flow skeleton of a triangulated surface mesh. More...

## Functions
template<class TriangleMesh >
void | CGAL::extract_mean_curvature_flow_skeleton (const TriangleMesh &tmesh, typename Mean_curvature_flow_skeletonization< TriangleMesh >::Skeleton &skeleton)
| extracts a medially centered curve skeleton for the triangle mesh `tmesh`. This function uses the class CGAL::Mean_curvature_flow_skeletonization with the default parameters. This function is provided only if Eigen 3.2 (or greater) is available and `CGAL_EIGEN3_ENABLED` is defined.

## Function Documentation

## ◆ extract_mean_curvature_flow_skeleton()

template<class TriangleMesh >

void CGAL::extract_mean_curvature_flow_skeleton | ( | const TriangleMesh & | tmesh,
|  | typename Mean_curvature_flow_skeletonization< TriangleMesh >::Skeleton & | skeleton
| ) |  |

`#include <CGAL/extract_mean_curvature_flow_skeleton.h>`

extracts a medially centered curve skeleton for the triangle mesh `tmesh`. This function uses the class CGAL::Mean_curvature_flow_skeletonization with the default parameters. This function is provided only if Eigen 3.2 (or greater) is available and `CGAL_EIGEN3_ENABLED` is defined.

Precondition
  `tmesh` is a triangle mesh without borders and having exactly one connected component.
  The specialization `boost::property_map<TriangleMesh, CGAL::vertex_point_t>::type` and `get(vertex_point, tmesh)` are defined.
  The value type of `boost::property_map<TriangleMesh, CGAL::vertex_point_t>::type` is a point type from a CGAL Kernel.

Template Parameters

  TriangleMesh | a model of `FaceListGraph`

Parameters

  tmesh | input mesh
  skeleton | graph that will contain the skeleton of `tmesh`. For each vertex descriptor `vd` of `skeleton`, the corresponding point and the set of input vertices that contracted to `vd` can be retrieved using `skeleton[vd].point` and `skeleton[vd].vertices` respectively.

Precondition
  `tmesh` is a triangulated surface mesh without borders and has exactly one connected component.

Examples
  Surface_mesh_skeletonization/segmentation_example.cpp, Surface_mesh_skeletonization/simple_mcfskel_example.cpp, and Surface_mesh_skeletonization/simple_mcfskel_sm_example.cpp.