DGtal::functors::ShapeGeometricFunctors::ShapeNormalVectorFunctor< TShape > Struct Template Reference

Aim: A functor RealPoint -> Quantity that returns the normal vector at given point. More...

#include <DGtal/shapes/ShapeGeometricFunctors.h>

Public Types
typedef TShape	Shape
typedef Shape::RealPoint	RealPoint
typedef Shape::RealVector	RealVector
typedef RealPoint	Argument
typedef RealVector::Component	Scalar
typedef RealVector	Quantity
typedef Quantity	Value

Public Member Functions
	ShapeNormalVectorFunctor (ConstAlias< Shape > aShape=0)
void	attach (ConstAlias< Shape > aShape)
Quantity	operator() (const RealPoint &p) const

Private Attributes
CountedConstPtrOrConstPtr< Shape >	myShape
	The shape of interest.

Detailed Description

template<typename TShape>
struct DGtal::functors::ShapeGeometricFunctors::ShapeNormalVectorFunctor< TShape >

Aim: A functor RealPoint -> Quantity that returns the normal vector at given point.

Description of template class 'ShapeNormalVectorFunctor'

Template Parameters

TShape

the type of the shape where geometric estimation are made. It must have methods gradient.

Definition at line 114 of file ShapeGeometricFunctors.h.

Member Typedef Documentation

Argument

template<typename TShape>

typedef RealPoint DGtal::functors::ShapeGeometricFunctors::ShapeNormalVectorFunctor< TShape >::Argument

Definition at line 118 of file ShapeGeometricFunctors.h.

Quantity

template<typename TShape>

typedef RealVector DGtal::functors::ShapeGeometricFunctors::ShapeNormalVectorFunctor< TShape >::Quantity

Definition at line 120 of file ShapeGeometricFunctors.h.

RealPoint

template<typename TShape>

typedef Shape::RealPoint DGtal::functors::ShapeGeometricFunctors::ShapeNormalVectorFunctor< TShape >::RealPoint

Definition at line 116 of file ShapeGeometricFunctors.h.

RealVector

template<typename TShape>

typedef Shape::RealVector DGtal::functors::ShapeGeometricFunctors::ShapeNormalVectorFunctor< TShape >::RealVector

Definition at line 117 of file ShapeGeometricFunctors.h.

Scalar

template<typename TShape>

typedef RealVector::Component DGtal::functors::ShapeGeometricFunctors::ShapeNormalVectorFunctor< TShape >::Scalar

Definition at line 119 of file ShapeGeometricFunctors.h.

Shape

template<typename TShape>

typedef TShape DGtal::functors::ShapeGeometricFunctors::ShapeNormalVectorFunctor< TShape >::Shape

Definition at line 115 of file ShapeGeometricFunctors.h.

Value

template<typename TShape>

typedef Quantity DGtal::functors::ShapeGeometricFunctors::ShapeNormalVectorFunctor< TShape >::Value

Definition at line 121 of file ShapeGeometricFunctors.h.

Constructor & Destructor Documentation

ShapeNormalVectorFunctor()

template<typename TShape>

DGtal::functors::ShapeGeometricFunctors::ShapeNormalVectorFunctor< TShape >::ShapeNormalVectorFunctor ( ConstAlias< Shape > aShape = 0 )

inline

Constructor. A shape may also be attached at construction.

Parameters

aShape

the shape of interest. The alias can be secured if a some counted pointer is handed.

Definition at line 129 of file ShapeGeometricFunctors.h.

: myShape( aShape ) {}

References myShape.

Member Function Documentation

attach()

template<typename TShape>

void DGtal::functors::ShapeGeometricFunctors::ShapeNormalVectorFunctor< TShape >::attach ( ConstAlias< Shape > aShape )

inline

Attach a shape.

Parameters

aShape

the shape of interest. The alias can be secured if a some counted pointer is handed.

Definition at line 137 of file ShapeGeometricFunctors.h.

      {
        myShape = aShape;
      }

References myShape.

operator()()

template<typename TShape>

Quantity DGtal::functors::ShapeGeometricFunctors::ShapeNormalVectorFunctor< TShape >::operator() ( const RealPoint & p ) const

inline

Map operator RealPoint -> RealVector giving the normal vector.

Parameters

p	any point on the shape.

Returns

the normal at point p (as the normalized gradient).

Definition at line 147 of file ShapeGeometricFunctors.h.

      {
        RealVector v = myShape->gradient( p );
        Scalar norm = v.norm();
        return ( norm != 0 ) ? v / norm : v;
      }

References myShape, and DGtal::PointVector< dim, TEuclideanRing, TContainer >::norm().

Field Documentation

myShape

template<typename TShape>

CountedConstPtrOrConstPtr<Shape> DGtal::functors::ShapeGeometricFunctors::ShapeNormalVectorFunctor< TShape >::myShape

private

The shape of interest.

Definition at line 156 of file ShapeGeometricFunctors.h.

Referenced by attach(), operator()(), and ShapeNormalVectorFunctor().

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

• ShapeGeometricFunctors.h