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itkTranslationTransform.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkTranslationTransform.h,v $
00005   Language:  C++
00006   Date:      $Date: 2009-04-09 09:23:25 $
00007   Version:   $Revision: 1.38 $
00008 
00009   Copyright (c) Insight Software Consortium. All rights reserved.
00010   See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
00011 
00012      This software is distributed WITHOUT ANY WARRANTY; without even 
00013      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00014      PURPOSE.  See the above copyright notices for more information.
00015 
00016 =========================================================================*/
00017 
00018 #ifndef __itkTranslationTransform_h
00019 #define __itkTranslationTransform_h
00020 
00021 #include <iostream>
00022 #include "itkTransform.h"
00023 #include "itkExceptionObject.h"
00024 #include "itkMatrix.h"
00025 
00026 namespace itk
00027 {
00028 
00037 template <
00038     class TScalarType=double,          // Data type for scalars (float or double)
00039     unsigned int NDimensions=3>        // Number of dimensions
00040 class ITK_EXPORT TranslationTransform : 
00041           public Transform< TScalarType, NDimensions, NDimensions >
00042 {
00043 public:
00045   typedef TranslationTransform                               Self;
00046   typedef Transform< TScalarType, NDimensions, NDimensions > Superclass;
00047   typedef SmartPointer<Self>                                 Pointer;
00048   typedef SmartPointer<const Self>                           ConstPointer;
00049 
00051   itkNewMacro( Self );
00052 
00054   itkTypeMacro( TranslationTransform, Transform );
00055 
00057   itkStaticConstMacro(SpaceDimension, unsigned int, NDimensions);
00058   itkStaticConstMacro(ParametersDimension, unsigned int, NDimensions);
00060 
00062   typedef typename Superclass::ScalarType ScalarType;
00063 
00065   typedef typename Superclass::ParametersType ParametersType;
00066 
00068   typedef typename Superclass::JacobianType JacobianType;
00069 
00071   typedef Vector<TScalarType, itkGetStaticConstMacro(SpaceDimension)> InputVectorType;
00072   typedef Vector<TScalarType, itkGetStaticConstMacro(SpaceDimension)> OutputVectorType;
00074 
00076   typedef CovariantVector<TScalarType, itkGetStaticConstMacro(SpaceDimension)> InputCovariantVectorType;
00077   typedef CovariantVector<TScalarType, itkGetStaticConstMacro(SpaceDimension)> OutputCovariantVectorType;
00079 
00081   typedef vnl_vector_fixed<TScalarType, itkGetStaticConstMacro(SpaceDimension)> InputVnlVectorType;
00082   typedef vnl_vector_fixed<TScalarType, itkGetStaticConstMacro(SpaceDimension)> OutputVnlVectorType;
00084 
00086   typedef Point<TScalarType, itkGetStaticConstMacro(SpaceDimension)> InputPointType;
00087   typedef Point<TScalarType, itkGetStaticConstMacro(SpaceDimension)> OutputPointType;
00089 
00092   typedef typename Superclass::InverseTransformBaseType InverseTransformBaseType;
00093   typedef typename InverseTransformBaseType::Pointer    InverseTransformBasePointer;
00094 
00097   const OutputVectorType & GetOffset(void) const
00098     { return m_Offset; }
00099 
00102   void SetParameters(const ParametersType & parameters);
00103 
00105   virtual const ParametersType& GetParameters(void) const;
00106 
00110   void SetOffset(const OutputVectorType &offset)
00111     { m_Offset = offset; return; }
00112 
00114   void Compose(const Self * other, bool pre=0);
00115 
00120   void Translate(const OutputVectorType &offset, bool pre=0);
00121 
00126   OutputPointType     TransformPoint(const InputPointType  &point ) const;
00127   OutputVectorType    TransformVector(const InputVectorType &vector) const;
00128   OutputVnlVectorType TransformVector(const InputVnlVectorType &vector) const;
00129   OutputCovariantVectorType TransformCovariantVector(
00130     const InputCovariantVectorType &vector) const;
00132 
00136   inline InputPointType    BackTransform(const OutputPointType  &point ) const;
00137   inline InputVectorType   BackTransform(const OutputVectorType &vector) const;
00138   inline InputVnlVectorType BackTransform(const OutputVnlVectorType &vector) const;
00139   inline InputCovariantVectorType BackTransform(
00140     const OutputCovariantVectorType &vector) const;
00142 
00147   bool GetInverse(Self* inverse) const;
00148 
00150   virtual InverseTransformBasePointer GetInverseTransform() const;
00151 
00153   virtual const JacobianType & GetJacobian(const InputPointType  &point ) const;
00154 
00156   void SetIdentity(void);
00157 
00159   virtual unsigned int GetNumberOfParameters(void) const 
00160                       { return NDimensions; }
00161 
00167   virtual bool IsLinear() const { return true; }
00168 
00172   virtual void SetFixedParameters( const ParametersType & ) 
00173     {}
00174 
00178   virtual const ParametersType& GetFixedParameters(void) const
00179     {
00180     this->m_FixedParameters.SetSize(0); 
00181     return this->m_FixedParameters;
00182     }
00184 
00185 protected:
00186   TranslationTransform();
00187   ~TranslationTransform();
00189   void PrintSelf(std::ostream &os, Indent indent) const;
00190 
00191 private:
00192   TranslationTransform(const Self&); //purposely not implemented
00193   void operator=(const Self&); //purposely not implemented
00194 
00195   OutputVectorType   m_Offset;       // Offset of the transformation
00196 
00197 
00198 }; //class TranslationTransform
00199 
00200 
00201 // Back transform a point
00202 template<class TScalarType, unsigned int NDimensions>
00203 inline
00204 typename TranslationTransform<TScalarType, NDimensions>::InputPointType
00205 TranslationTransform<TScalarType, NDimensions>::
00206 BackTransform(const OutputPointType &point) const {
00207   return point - m_Offset;
00208 }
00209 
00210 // Back transform a vector
00211 template<class TScalarType, unsigned int NDimensions>
00212 inline
00213 typename TranslationTransform<TScalarType, NDimensions>::InputVectorType
00214 TranslationTransform<TScalarType, NDimensions>::
00215 BackTransform(const OutputVectorType &vect ) const 
00216 {
00217   return  vect;
00218 }
00219 
00220 // Back transform a vnl_vector
00221 template<class TScalarType, unsigned int NDimensions>
00222 inline
00223 typename TranslationTransform<TScalarType, NDimensions>::InputVnlVectorType
00224 TranslationTransform<TScalarType, NDimensions>::
00225 BackTransform(const OutputVnlVectorType &vect ) const 
00226 {
00227   return  vect;
00228 }
00229 
00230 
00231 // Back Transform a CovariantVector
00232 template<class TScalarType, unsigned int NDimensions>
00233 inline
00234 typename TranslationTransform<TScalarType, NDimensions>::InputCovariantVectorType
00235 TranslationTransform<TScalarType, NDimensions>::
00236 BackTransform(const OutputCovariantVectorType &vect) const 
00237 {
00238   return vect;
00239 }
00240 
00241 }  // namespace itk
00242 
00243 // Define instantiation macro for this template.
00244 #define ITK_TEMPLATE_TranslationTransform(_, EXPORT, x, y) namespace itk { \
00245   _(2(class EXPORT TranslationTransform< ITK_TEMPLATE_2 x >)) \
00246   namespace Templates { typedef TranslationTransform< ITK_TEMPLATE_2 x > TranslationTransform##y; } \
00247   }
00248 
00249 #if ITK_TEMPLATE_EXPLICIT
00250 # include "Templates/itkTranslationTransform+-.h"
00251 #endif
00252 
00253 #if ITK_TEMPLATE_TXX
00254 # include "itkTranslationTransform.txx"
00255 #endif
00256 
00257 #endif /* __itkTranslationTransform_h */
00258 

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