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/*========================================================================= |
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Program: Insight Segmentation & Registration Toolkit |
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Module: $RCSfile: itkSymmetricEllipsoidInteriorExteriorSpatialFunction.txx.html,v $ |
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Language: C++ |
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Date: $Date: 2006/01/17 19:15:48 $ |
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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 __itkSymmetricEllipsoidInteriorExteriorSpatialFunction_cpp |
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#define __itkSymmetricEllipsoidInteriorExteriorSpatialFunction_cpp |
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#include "itkSymmetricEllipsoidInteriorExteriorSpatialFunction.h" |
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#include <math.h> |
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namespace itk |
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{ |
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template <unsigned int VDimension, typename TInput> |
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SymmetricEllipsoidInteriorExteriorSpatialFunction<VDimension,TInput> |
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::SymmetricEllipsoidInteriorExteriorSpatialFunction() |
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{ |
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m_Center.Fill(0.0); // Origin of ellipsoid |
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m_Orientation.Fill(1.0); // Orientation of unique axis |
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m_UniqueAxis = 10; // Length of unique axis |
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m_SymmetricAxes = 5; // Length of symmetric axes |
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} |
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template <unsigned int VDimension, typename TInput> |
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SymmetricEllipsoidInteriorExteriorSpatialFunction<VDimension,TInput> |
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::~SymmetricEllipsoidInteriorExteriorSpatialFunction() |
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{ |
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} |
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template <unsigned int VDimension,typename TInput> |
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typename SymmetricEllipsoidInteriorExteriorSpatialFunction<VDimension, TInput>::OutputType |
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SymmetricEllipsoidInteriorExteriorSpatialFunction<VDimension, TInput> |
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::Evaluate(const InputType& position) const |
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{ |
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double uniqueTerm; // Term in ellipsoid equation for unique axis |
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double symmetricTerm; // Term in ellipsoid equation for symmetric axes |
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Vector<double, VDimension> pointVector; |
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Vector<double, VDimension> symmetricVector; |
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// Project the position onto the major axis, normalize by axis length, |
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// and determine whether position is inside ellipsoid. |
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for(unsigned int i = 0; i < VDimension; i++) |
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{ |
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pointVector[i] = position[i] - m_Center[i]; |
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} |
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uniqueTerm = pow(static_cast<double>(((pointVector * m_Orientation)/(.5*m_UniqueAxis))),static_cast<double>(2)); |
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symmetricVector = pointVector - (m_Orientation * (pointVector * m_Orientation)); |
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symmetricTerm = pow(static_cast<double>(((symmetricVector.GetNorm())/(.5*m_SymmetricAxes))),static_cast<double>(2)); |
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if((uniqueTerm + symmetricTerm) >= 0 && (uniqueTerm + symmetricTerm) <= 1) |
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{ |
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return 1; // Inside the ellipsoid. |
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} |
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//Default return value assumes outside the ellipsoid |
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return 0; // Outside the ellipsoid. |
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} |
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template <unsigned int VDimension,typename TInput> |
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void SymmetricEllipsoidInteriorExteriorSpatialFunction<VDimension,TInput> |
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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 << "Origin of Ellipsoid: "; |
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os << m_Center << std::endl; |
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os << indent << "Unique Axis Orientation: "; |
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os << m_Orientation << std::endl; |
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os << indent << "Unique Axis Length: "; |
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os << m_UniqueAxis << std::endl; |
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os << indent << "Symmetric Axis Length: "; |
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os << m_SymmetricAxes << std::endl; |
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} |
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template <unsigned int VDimension,typename TInput> |
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void SymmetricEllipsoidInteriorExteriorSpatialFunction<VDimension, TInput> |
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::SetOrientation(VectorType orientation, double uniqueAxis, double symmetricAxes) |
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{ |
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m_Orientation = orientation; // Orientation of unique axis of ellipsoid |
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m_SymmetricAxes = symmetricAxes; // Length of symmetric axes |
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m_UniqueAxis = uniqueAxis; // Length of unique axis |
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} |
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} // end namespace itk |
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#endif |
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