class ActiveVertexContour2D : public VertexContour2D, public ActiveVertex2D

Vertex class of an active contour 2D that include geometric members and method in order to compute internal and external forces

Inheritance:

Public Methods

AContourLine2D*	getLine () const returns the line of the active contour where the vertex belongs
ActiveContour2D*	getActiveContour2D () const returns the active contour where the vertex belongs
EdgeActiveContour2D*	getEdge () const returns the edge pointed by a vertex
ActiveVertexContour2D*	getFollowing () const Returns the right neighboring vertex in the line taking into account the line topology
ActiveVertexContour2D*	getPrevious () const Returns the left neighboring vertex in the line taking into account the line topology
ActiveVertexContour2D*	getTopologicalFollowing () const Returns the right neighboring vertex in the line without taking into account the line topology
ActiveVertexContour2D*	getTopologicalPrevious () const Returns the left neighboring vertex in the line without taking into account the line topology
EdgeContour*	removeVertexBasic () Remove a vertex and update the data structure of neighboring vertices
EdgeActiveContour2D*	removeVertex () Remove a vertex by calling removeVertexBasic() and updates the maximum rigidity value
double	getSimplexAngle () const return the simplex angle value
int	getMatrixIndex () const return the index in the stiffness matrix
double	getCurvature () const return the curvature value
double	getReferenceSimplexAngle () const return the reference simplex angle
void	getReferenceMetricParameters ( double rmp[2]) returns the reference metric parameters value
void	updateReferenceMetricParametersFromCurvature (const double magnitude) change the reference metric parameter of a vertex based on the curvature of its two neighbors
void	computeSimplexAngle () computes the simplex angle and store it
void	computeCurvature () computes the vertex curvature and store it in the curvature field
void	computeMetricParameters (double mp[2]) const throw(InvalidMetricParameters) compute the actual metrics parameters and store them in mp[] ( the reference metrics parameters are not modified)
void	storeMetricParameters () throw(InvalidMetricParameters) store the current metrics parameters as the reference metrics parameters
void	resetMetricParameters () reset the reference metrics parameters
void	computeEdgeDirection () throw(ContourLine2D::IllegalGeometry) compute the 2 neighboring edge length and edge direction
void	updatePosition () If the vertex is not fixed, then the position and previous position of that vertex are updated given the current internal and external force
void	computeExternalForce () compute the external force and store it in force[EXTERNAL]
virtual void	fixVertex () fix a vertex ie prevent it from moving
virtual void	unfixVertex () free a vertex ie allow it to move
virtual void	setMobility (const bool m) set the mobility of a vertex

Public

	Exception classes class InvalidMetricParameters : public Exception Exception thrown when a vertex is found to have a negative metric parameter
	Constructors ActiveVertexContour2D (AContourLine2D *line, Vec2 pos, RangeInformation *ri=0) create a vertex given its position
	Destructor virtual ~ActiveVertexContour2D () empty destructor

Protected Fields

double	simplexAngle Simplex angle
double	referenceMetricParameters [2] Reference Metrics parameters
double	curvature curvature at a vertex
double	referenceSimplexAngle reference simplex angle at a vertex used for shape constraint
int	matrixIndex index of the vertex in the stiffness matrix (row number matrixIndex and matrixIndex+1) : it is equal to -1 if it is not in the stiffness matrix

Inherited from VertexContour2D:

Public Methods

Vec2 getPosition() const

void setPosition(const Vec2 &p)

Contour2D* getContour2D() const

void computeTangent()

Vec2 getTangent() const

Vec2 getNormal() const

Public

Destructors

virtual ~VertexContour2D()

empty Destructor

Protected Fields

Vec2 position

Vec2 tangent

Inherited from VertexContour:

Public Methods

const char* getName() const

Contour* getContour() const

unsigned int getRank() const

unsigned int getRankInLine() const

unsigned int getRef() const

void setName(const char *theName)

Protected Fields

EdgeContour* edge

ContourLine* line

Private Fields

char* name

Exception classes

class InvalidMetricParameters: public Exception

Exception thrown when a vertex is found to have a negative metric parameter

double simplexAngle

Simplex angle

double referenceMetricParameters[2]

Reference Metrics parameters

double curvature

curvature at a vertex

double referenceSimplexAngle

reference simplex angle at a vertex used for shape constraint

int matrixIndex

index of the vertex in the stiffness matrix (row number matrixIndex and matrixIndex+1) : it is equal to -1 if it is not in the stiffness matrix

Constructors

ActiveVertexContour2D(AContourLine2D *line, Vec2 pos, RangeInformation *ri=0)

create a vertex given its position

Parameters:

line - the line where the vertex should be inserted
pos - the vertex position
ri - the range information that is stored on that vertex

Destructor

virtual ~ActiveVertexContour2D()

empty destructor

AContourLine2D* getLine() const

returns the line of the active contour where the vertex belongs

ActiveContour2D* getActiveContour2D() const

returns the active contour where the vertex belongs

EdgeActiveContour2D* getEdge() const

returns the edge pointed by a vertex

ActiveVertexContour2D* getFollowing() const

Returns the right neighboring vertex in the line taking into account the line topology

ActiveVertexContour2D* getPrevious() const

Returns the left neighboring vertex in the line taking into account the line topology

ActiveVertexContour2D* getTopologicalFollowing() const

Returns the right neighboring vertex in the line without taking into account the line topology

ActiveVertexContour2D* getTopologicalPrevious() const

Returns the left neighboring vertex in the line without taking into account the line topology

EdgeContour* removeVertexBasic()

Remove a vertex and update the data structure of neighboring vertices

EdgeActiveContour2D* removeVertex()

Remove a vertex by calling removeVertexBasic() and updates the maximum rigidity value

double getSimplexAngle() const

return the simplex angle value

int getMatrixIndex() const

return the index in the stiffness matrix

double getCurvature() const

return the curvature value

double getReferenceSimplexAngle() const

return the reference simplex angle

void getReferenceMetricParameters( double rmp[2])

returns the reference metric parameters value

void updateReferenceMetricParametersFromCurvature(const double magnitude)

change the reference metric parameter of a vertex based on the curvature of its two neighbors

Parameters:

magnitude - this parameter should be between 0 and 1. if it is equal to 0 then the metric parameter are set to 0.5. Otherwise, if it is equal to 1 the metrics parameters may be between 0.1 and 0.9 depending on the curvature variation. For intermediate values the possible variation of metric parameter is proportional to this magnitude

void computeSimplexAngle()

computes the simplex angle and store it

void computeCurvature()

computes the vertex curvature and store it in the curvature field

void computeMetricParameters(double mp[2]) const throw(InvalidMetricParameters)

compute the actual metrics parameters and store them in mp[] ( the reference metrics parameters are not modified)

Parameters:

mp - the array of double where the actual metric parameters are stored

void storeMetricParameters() throw(InvalidMetricParameters)

store the current metrics parameters as the reference metrics parameters

void resetMetricParameters()

reset the reference metrics parameters

void computeEdgeDirection() throw(ContourLine2D::IllegalGeometry)

compute the 2 neighboring edge length and edge direction

void updatePosition()

If the vertex is not fixed, then the position and previous position of that vertex are updated given the current internal and external force

void computeExternalForce()

compute the external force and store it in force[EXTERNAL]. To do so, it calls all range data using the local range information

virtual void fixVertex()

fix a vertex ie prevent it from moving

virtual void unfixVertex()

free a vertex ie allow it to move

virtual void setMobility(const bool m)

set the mobility of a vertex

alphabetic index hierarchy of classes

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