vcg::tri::UpdateCurvature< MeshType > Class Template Reference

Management, updating and computation of per-vertex and per-face normals. More...

#include <vcg/complex/algorithms/update/curvature.h>

Classes
class	AreaData

Public Types
typedef MeshType::FaceType	FaceType
typedef MeshType::FacePointer	FacePointer
typedef MeshType::FaceIterator	FaceIterator
typedef MeshType::VertexIterator	VertexIterator
typedef MeshType::VertContainer	VertContainer
typedef MeshType::VertexType	VertexType
typedef MeshType::VertexPointer	VertexPointer
typedef vcg::face::VFIterator< FaceType >	VFIteratorType
typedef MeshType::CoordType	CoordType
typedef CoordType::ScalarType	ScalarType
typedef MeshType::VertexType::CurScalarType	CurScalarType
typedef MeshType::VertexType::CurVecType	CurVecType
typedef vcg::GridStaticPtr< FaceType, ScalarType >	MeshGridType
typedef vcg::GridStaticPtr< VertexType, ScalarType >	PointsGridType

Static Public Member Functions
static void	PrincipalDirections (MeshType &m)
	Compute principal direction and magnitudo of curvature.
static void	PrincipalDirectionsPCA (MeshType &m, ScalarType r, bool pointVSfaceInt=true, vcg::CallBackPos *cb=NULL)
static void	MeanAndGaussian (MeshType &m)
	Computes the discrete mean gaussian curvature. More...
static void	PerVertexAbsoluteMeanAndGaussian (MeshType &m)
	Update the mean and the gaussian curvature of a vertex. More...
static void	PrincipalDirectionsNormalCycle (MeshType &m)
static void	PerVertexBasicRadialCrossField (MeshType &m, float anisotropyRatio=1.0)

Detailed Description

template<class MeshType>
class vcg::tri::UpdateCurvature< MeshType >

Management, updating and computation of per-vertex and per-face normals.

This class is used to compute or update the normals that can be stored in the vertex or face component of a mesh.

Member Typedef Documentation

MeshGridType

template<class MeshType >

typedef vcg::GridStaticPtr<FaceType, ScalarType > vcg::tri::UpdateCurvature< MeshType >::MeshGridType

Curvature meseaure as described in the paper: Robust principal curvatures on Multiple Scales, Yong-Liang Yang, Yu-Kun Lai, Shi-Min Hu Helmut Pottmann SGP 2004 If pointVSfaceInt==true the covariance is computed by montecarlo sampling on the mesh (faster) If pointVSfaceInt==false the covariance is computed by (analytic)integration over the surface (slower)

Member Function Documentation

MeanAndGaussian()

template<class MeshType >

static void vcg::tri::UpdateCurvature< MeshType >::MeanAndGaussian ( MeshType &  m )

inlinestatic

Computes the discrete mean gaussian curvature.

The algorithm used is the one Desbrun et al. that is based on a discrete analysis of the angles of the faces around a vertex.

It requires FaceFace Adjacency;

For further details, please, refer to:
Discrete Differential-Geometry Operators for Triangulated 2-Manifolds
Mark Meyer, Mathieu Desbrun, Peter Schroder, Alan H. Barr
VisMath '02, Berlin

PerVertexAbsoluteMeanAndGaussian()

template<class MeshType >

static void vcg::tri::UpdateCurvature< MeshType >::PerVertexAbsoluteMeanAndGaussian ( MeshType &  m )

inlinestatic

Update the mean and the gaussian curvature of a vertex.

The function uses the VF adiacency to walk around the vertex.

Based on the paper "Optimizing 3d triangulations using discrete curvature analysis" it compute an approximation of the gaussian and of the absolute mean curvature

---

The documentation for this class was generated from the following file:

• /home/cignoni/devel/vcglib/vcg/complex/algorithms/update/curvature.h