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00017 #ifndef __itkFiniteDifferenceFunction_h
00018 #define __itkFiniteDifferenceFunction_h
00019
00020 #include "itkLightObject.h"
00021 #include "itkConstNeighborhoodIterator.h"
00022 #include "itkZeroFluxNeumannBoundaryCondition.h"
00023 #include "itkVector.h"
00024 #include "itkFixedArray.h"
00025
00026 namespace itk {
00027
00064 template<class TImageType>
00065 class ITK_EXPORT FiniteDifferenceFunction : public LightObject
00066 {
00067 public:
00068
00070 typedef FiniteDifferenceFunction Self;
00071 typedef LightObject Superclass;
00072 typedef SmartPointer<Self> Pointer;
00073 typedef SmartPointer<const Self> ConstPointer;
00074
00076 itkTypeMacro( FiniteDifferenceFunction, LightObject );
00077
00079 typedef TImageType ImageType;
00080 typedef typename ImageType::PixelType PixelType;
00081 typedef double PixelRealType;
00082
00084 itkStaticConstMacro(ImageDimension, unsigned int, ImageType::ImageDimension);
00085
00087 typedef double TimeStepType;
00088
00091 typedef ZeroFluxNeumannBoundaryCondition<ImageType>
00092 DefaultBoundaryConditionType;
00093
00095 typedef typename ConstNeighborhoodIterator<TImageType>::RadiusType RadiusType;
00096
00099 typedef ConstNeighborhoodIterator<TImageType, DefaultBoundaryConditionType> NeighborhoodType;
00100
00103 typedef Vector<PixelRealType,itkGetStaticConstMacro(ImageDimension)> NeighborhoodScalesType;
00104
00107 typedef Vector<float,itkGetStaticConstMacro(ImageDimension)> FloatOffsetType;
00108
00118 virtual void InitializeIteration() {};
00119
00133 #if !defined(CABLE_CONFIGURATION)
00134 virtual PixelType ComputeUpdate(const NeighborhoodType &neighborhood,
00135 void *globalData,
00136 const FloatOffsetType &offset = FloatOffsetType(0.0)) = 0;
00137 #endif
00138
00141 void SetRadius(const RadiusType &r)
00142 { m_Radius = r; }
00143
00146 const RadiusType &GetRadius() const
00147 { return m_Radius; }
00148
00152 void SetScaleCoefficients (PixelRealType vals[ImageDimension])
00153 {
00154 for( unsigned int i = 0; i < ImageDimension; i++ )
00155 {
00156 m_ScaleCoefficients[i] = vals[i];
00157 }
00158 }
00160
00164 const NeighborhoodScalesType ComputeNeighborhoodScales() const;
00165
00172 virtual TimeStepType ComputeGlobalTimeStep(void *GlobalData) const =0;
00173
00181 virtual void *GetGlobalDataPointer() const =0;
00182
00188 virtual void ReleaseGlobalDataPointer(void *GlobalData) const =0;
00189
00190 protected:
00191 FiniteDifferenceFunction()
00192 {
00193
00194 m_Radius.Fill( 0 );
00195 for (unsigned int i = 0; i < ImageDimension; i++)
00196 {
00197 m_ScaleCoefficients[i] = 1.0;
00198 }
00199 }
00200 ~FiniteDifferenceFunction() {}
00201 void PrintSelf(std::ostream& os, Indent indent) const;
00202
00203 RadiusType m_Radius;
00204 PixelRealType m_ScaleCoefficients[ImageDimension];
00205
00206 private:
00207 FiniteDifferenceFunction(const Self&);
00208 void operator=(const Self&);
00209 };
00210
00211 }
00212
00213
00214 #define ITK_TEMPLATE_FiniteDifferenceFunction(_, EXPORT, x, y) namespace itk { \
00215 _(1(class EXPORT FiniteDifferenceFunction< ITK_TEMPLATE_1 x >)) \
00216 namespace Templates { typedef FiniteDifferenceFunction< ITK_TEMPLATE_1 x > FiniteDifferenceFunction##y; } \
00217 }
00218
00219 #if ITK_TEMPLATE_EXPLICIT
00220 # include "Templates/itkFiniteDifferenceFunction+-.h"
00221 #endif
00222
00223 #if ITK_TEMPLATE_TXX
00224 # include "itkFiniteDifferenceFunction.txx"
00225 #endif
00226
00227 #endif
00228