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 #include <cpExtensions/Algorithms/BezierCurveFunction.hxx>
  71
  72 #endif // __CPEXTENSIONS__ALGORITHMS__BEZIERCURVEFUNCTION__H__
  73
  74 // eof - $RCSfile$