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