lib/cpExtensions/Algorithms/BezierCurveFunction.h

   1 // -------------------------------------------------------------------------
   2 // @author Leonardo Florez-Valencia (florez-l@javeriana.edu.co)
   3 // -------------------------------------------------------------------------
   4
   5 #ifndef __CPEXTENSIONS__ALGORITHMS__BEZIERCURVEFUNCTION__H__
   6 #define __CPEXTENSIONS__ALGORITHMS__BEZIERCURVEFUNCTION__H__
   7
   8 #include <vector>
   9 #include <itkFunctionBase.h>
  10 #include <itkMatrix.h>
  11
  12 namespace cpExtensions
  13 {
  14   namespace Algorithms
  15   {
  16     /**
  17      * Uses the De Casteljau's algorithm.
  18      */
  19     template< class V >
  20     class BezierCurveFunction
  21       : public itk::FunctionBase< typename V::ValueType, V >
  22     {
  23     public:
  24       typedef BezierCurveFunction                           Self;
  25       typedef itk::FunctionBase< typename V::ValueType, V > Superclass;
  26       typedef itk::SmartPointer< Self >                     Pointer;
  27       typedef itk::SmartPointer< const Self >               ConstPointer;
  28
  29       typedef V                     TVector;
  30       typedef typename V::ValueType TScalar;
  31
  32       typedef
  33       itk::Matrix< TScalar, TVector::Dimension, TVector::Dimension >
  34       TFrame;
  35       typedef std::vector< TVector > TVectorsContainer;
  36
  37     public:
  38       itkNewMacro( Self );
  39       itkTypeMacro( BezierCurveFunction, itkFunctionBase );
  40
  41     public:
  42       virtual void AddPoint( const TVector& v );
  43       virtual unsigned int GetNumberOfPoints( ) const;
  44
  45       virtual TVector Evaluate( const TScalar& u ) const;
  46       virtual TFrame EvaluateFrenetFrame( const TScalar& u ) const;
  47       virtual TScalar EvaluateLength( ) const;
  48
  49     protected:
  50       BezierCurveFunction( );
  51       virtual ~BezierCurveFunction( ) { }
  52
  53       void _UpdateDerivative( ) const;
  54
  55     private:
  56       // Purposely not implemented
  57       BezierCurveFunction( const Self& other );
  58       Self& operator=( const Self& other );
  59
  60     protected:
  61       TVectorsContainer m_Vectors;
  62       mutable Pointer   m_Derivative;
  63       mutable bool      m_DerivativeUpdated;
  64     };
  65
  66   } // ecapseman
  67
  68 } // ecapseman
  69
  70 #ifndef ITK_MANUAL_INSTANTIATION
  71 #include <cpExtensions/Algorithms/BezierCurveFunction.hxx>
  72 #endif // ITK_MANUAL_INSTANTIATION
  73
  74 #endif // __CPEXTENSIONS__ALGORITHMS__BEZIERCURVEFUNCTION__H__
  75
  76 // eof - $RCSfile$