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/*========================================================================= |
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Program: Insight Segmentation & Registration Toolkit |
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Module: $RCSfile: itkQuaternionRigidTransform.txx.html,v $ |
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Language: C++ |
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Date: $Date: 2006/01/17 19:15:46 $ |
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Version: $Revision: 1.4 $ |
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Copyright (c) Insight Software Consortium. All rights reserved. |
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See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details. |
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This software is distributed WITHOUT ANY WARRANTY; without even |
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
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PURPOSE. See the above copyright notices for more information. |
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=========================================================================*/ |
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#ifndef _itkQuaternionRigidTransform_txx |
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#define _itkQuaternionRigidTransform_txx |
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#include "itkQuaternionRigidTransform.h" |
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namespace itk |
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{ |
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// Constructor with default arguments |
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template <class TScalarType> |
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QuaternionRigidTransform<TScalarType> |
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::QuaternionRigidTransform() : |
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**Superclass(SpaceDimension, ParametersDimension) |
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{ |
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m_Rotation = VnlQuaternionType(0,0,0,1); // axis * sin(t/2), cos(t/2) |
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} |
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// Constructor with default arguments |
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template<class TScalarType> |
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QuaternionRigidTransform<TScalarType>:: |
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QuaternionRigidTransform( unsigned int outputSpaceDimension, |
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unsigned int parametersDimension ) : |
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**Superclass(outputSpaceDimension, parametersDimension) |
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{ |
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m_Rotation = VnlQuaternionType(0,0,0,1); // axis * sin(t/2), cos(t/2) |
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} |
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EML |
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// Constructor with explicit arguments |
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template<class TScalarType> |
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QuaternionRigidTransform<TScalarType>:: |
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QuaternionRigidTransform( const MatrixType & matrix, |
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const OutputVectorType & offset ) : |
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**Superclass(matrix, offset) |
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{ |
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this->ComputeMatrixParameters(); |
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} |
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// Print self |
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template<class TScalarType> |
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void |
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QuaternionRigidTransform<TScalarType>:: |
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PrintSelf(std::ostream &os, Indent indent ) const |
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{ |
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Superclass::PrintSelf(os,indent); |
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os << indent << "Rotation: " << m_Rotation << std::endl; |
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} |
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// Set rotation |
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template<class TScalarType> |
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void |
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QuaternionRigidTransform<TScalarType>:: |
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SetRotation(const VnlQuaternionType &rotation ) |
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{ |
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m_Rotation = rotation; |
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this->ComputeMatrix(); |
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return; |
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} |
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// Set the parameters in order to fit an Identity transform |
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template<class TScalarType> |
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void |
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QuaternionRigidTransform<TScalarType>:: |
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SetIdentity( void ) |
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{ |
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m_Rotation = VnlQuaternionType(0,0,0,1); |
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this->Superclass::SetIdentity(); |
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} |
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// Set Parameters |
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template <class TScalarType> |
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void |
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QuaternionRigidTransform<TScalarType> |
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::SetParameters( const ParametersType & parameters ) |
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{ |
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OutputVectorType translation; |
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// Transfer the quaternion part |
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unsigned int par = 0; |
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for(unsigned int j=0; j < 4; j++) |
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{ |
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m_Rotation[j] = parameters[par]; |
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++par; |
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} |
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this->ComputeMatrix(); |
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// Transfer the constant part |
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for(unsigned int i=0; i < SpaceDimension; i++) |
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{ |
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translation[i] = parameters[par]; |
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++par; |
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} |
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this->SetVarTranslation( translation ); |
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this->ComputeOffset(); |
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} |
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EML |
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// Set Parameters |
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template <class TScalarType> |
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const |
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typename QuaternionRigidTransform<TScalarType>::ParametersType & |
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QuaternionRigidTransform<TScalarType> |
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::GetParameters() const |
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{ |
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VnlQuaternionType quaternion = this->GetRotation(); |
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OutputVectorType translation = this->GetTranslation(); |
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// Transfer the quaternion part |
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unsigned int par = 0; |
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for(unsigned int j=0; j < 4; j++) |
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{ |
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this->m_Parameters[par] = quaternion[j]; |
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++par; |
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} |
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// Transfer the constant part |
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for(unsigned int i=0; i < SpaceDimension; i++) |
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{ |
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this->m_Parameters[par] = translation[i]; |
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++par; |
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} |
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return this->m_Parameters; |
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} |
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// Get parameters |
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template<class TScalarType> |
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const typename QuaternionRigidTransform<TScalarType>::JacobianType & |
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QuaternionRigidTransform<TScalarType>:: |
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GetJacobian( const InputPointType & p ) const |
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{ |
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// compute derivatives with respect to rotation |
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this->m_Jacobian.Fill(0.0); |
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const TScalarType x = p[0] - this->GetCenter()[0]; |
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const TScalarType y = p[1] - this->GetCenter()[1]; |
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const TScalarType z = p[2] - this->GetCenter()[2]; |
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// compute Jacobian with respect to quaternion parameters |
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this->m_Jacobian[0][0] = 2.0 * ( m_Rotation.x() * x + m_Rotation.y() * y |
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******************************+ m_Rotation.z() * z ); |
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this->m_Jacobian[0][1] = 2.0 * (- m_Rotation.y() * x + m_Rotation.x() * y |
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******************************+ m_Rotation.r() * z ); |
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this->m_Jacobian[0][2] = 2.0 * (- m_Rotation.z() * x - m_Rotation.r() * y |
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******************************+ m_Rotation.x() * z ); |
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this->m_Jacobian[0][3] = - 2.0 * (- m_Rotation.r() * x + m_Rotation.z() * y |
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******************************- m_Rotation.y() * z ); |
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this->m_Jacobian[1][0] = - this->m_Jacobian[0][1]; |
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this->m_Jacobian[1][1] = this->m_Jacobian[0][0]; |
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this->m_Jacobian[1][2] = this->m_Jacobian[0][3]; |
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this->m_Jacobian[1][3] = - this->m_Jacobian[0][2]; |
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this->m_Jacobian[2][0] = - this->m_Jacobian[0][2]; |
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this->m_Jacobian[2][1] = - this->m_Jacobian[0][3]; |
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this->m_Jacobian[2][2] = this->m_Jacobian[0][0]; |
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this->m_Jacobian[2][3] = this->m_Jacobian[0][1]; |
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// compute derivatives for the translation part |
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unsigned int blockOffset = 4; |
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for(unsigned int dim=0; dim < SpaceDimension; dim++ ) |
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{ |
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this->m_Jacobian[ dim ][ blockOffset + dim ] = 1.0; |
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} |
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return this->m_Jacobian; |
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} |
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template<class TScalarType> |
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const typename QuaternionRigidTransform< TScalarType >::InverseMatrixType & |
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QuaternionRigidTransform<TScalarType>:: |
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GetInverseMatrix() const |
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{ |
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// If the transform has been modified we recompute the inverse |
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if(this->InverseMatrixIsOld()) |
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{ |
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InverseMatrixType newMatrix; |
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VnlQuaternionType conjugateRotation = m_Rotation.conjugate(); |
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VnlQuaternionType inverseRotation = conjugateRotation.inverse(); |
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newMatrix = inverseRotation.rotation_matrix_transpose(); |
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this->SetVarInverseMatrix(newMatrix); |
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} |
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return this->GetVarInverseMatrix(); |
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} |
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template<class TScalarType> |
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void |
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QuaternionRigidTransform<TScalarType>:: |
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ComputeMatrix() |
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{ |
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VnlQuaternionType conjugateRotation = m_Rotation.conjugate(); |
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// this is done to compensate for the transposed representation |
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// between VNL and ITK |
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MatrixType newMatrix; |
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newMatrix = conjugateRotation.rotation_matrix_transpose(); |
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this->SetVarMatrix(newMatrix); |
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} |
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template<class TScalarType> |
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void |
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QuaternionRigidTransform<TScalarType>:: |
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ComputeMatrixParameters() |
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{ |
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VnlQuaternionType quat(this->GetMatrix().GetVnlMatrix()); |
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m_Rotation = quat; |
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} |
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} // namespace |
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#endif |
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