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itkBalloonForceFilter.txx
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itkBalloonForceFilter.txx
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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkBalloonForceFilter.txx
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef _itkBalloonForceFilter_txx
#define _itkBalloonForceFilter_txx
#ifdef _MSC_VER
#pragma warning ( disable : 4786 )
#endif
#include "itkBalloonForceFilter.h"
namespace itk
{
/*
* standard
*/
template <typename TInputMesh, typename TOutputMesh>
BalloonForceFilter<TInputMesh, TOutputMesh>
::BalloonForceFilter()
{
m_Step = 0;
m_GradientBegin = 0;
m_DistanceToBoundary = 100;
m_DistanceToStop = 10;
m_Center.Fill(0);
m_Stiffness.Fill(0);
m_TimeStep = 0.0;
m_DistanceForGradient = 0.0;
m_Resolution = 0;
m_K = 0;
m_NewNodes = 0;
m_NewNodeLimit = 0;
typename TOutputMesh::Pointer output = TOutputMesh::New();
this->ProcessObject::SetNumberOfRequiredOutputs(1);
this->ProcessObject::SetNthOutput(0, output.GetPointer());
}
template <typename TInputMesh, typename TOutputMesh>
BalloonForceFilter<TInputMesh, TOutputMesh>
::~BalloonForceFilter()
{
if (m_NewNodes)
{
for (unsigned int i = 0; i < m_NewNodeLimit; i++)
{
if (m_NewNodes[i])
{
free(m_NewNodes[i]);
m_NewNodes[i] = 0;
}
}
free(m_NewNodes);
m_NewNodes = 0;
}
if (m_K)
{
free (m_K);
}
}
/*
* PrintSelf
*/
template <typename TInputMesh, typename TOutputMesh>
void
BalloonForceFilter<TInputMesh, TOutputMesh>
::PrintSelf(std::ostream& os, Indent indent) const
{
Superclass::PrintSelf(os,indent);
os << indent << "Center = " << m_Center << std::endl;
os << indent << "TimeStep = " << m_TimeStep << std::endl;
if (m_Gradient)
{
os << indent << "Gradient = " << m_Gradient << std::endl;
}
else
{
os << indent << "Gradient = (None)" << std::endl;
}
if (m_Forces)
{
os << indent << "Forces = " << m_Forces << std::endl;
}
else
{
os << indent << "Forces = (None)" << std::endl;
}
os << indent << "Stiffness = " << m_Stiffness << std::endl;
os << indent << "DistanceForGradient = " << m_DistanceForGradient << std::endl;
os << indent << "GradientBegin = " << m_GradientBegin << std::endl;
os << indent << "Resolution = " << m_Resolution << std::endl;
if (!m_ImageOutput.IsNull())
{
os << indent << "ImageOutput = " << m_ImageOutput << std::endl;
}
if (m_Potential)
{
os << indent << "Potential = " << m_Potential << std::endl;
}
else
{
os << indent << "Potential = (None)" << std::endl;
}
if (m_Displacements)
{
os << indent << "Displacements = " << m_Displacements << std::endl;
}
else
{
os << indent << "Displacements = (None)" << std::endl;
}
if (m_Locations)
{
os << indent << "Locations = " << m_Locations << std::endl;
}
else
{
os << indent << "Locations = (None)" << std::endl;
}
os << indent << "DistanceToStop = " << m_DistanceToStop << std::endl;
if (m_Derives)
{
os << indent << "Derives = " << m_Derives << std::endl;
}
else
{
os << indent << "Derives = (None)" << std::endl;
}
if (m_Normals)
{
os << indent << "Normals = " << m_Normals << std::endl;
}
else
{
os << indent << "Normals = (None)" << std::endl;
}
}// end PrintSelf
/* Set default value of parameters and initialize local data container
* such as forces, displacements and displacement derivatives. */
template <typename TInputMesh, typename TOutputMesh>
void
BalloonForceFilter<TInputMesh, TOutputMesh>
::Initialize()
{
m_NumberOfNodes = this->GetInput(0)->GetNumberOfPoints();
m_NumberOfCells = this->GetInput(0)->GetNumberOfCells();
m_Forces = InputMeshType::New();
m_Displacements = InputMeshType::New();
m_Derives = InputMeshType::New();
m_Normals = InputMeshType::New();
m_Locations = InputMeshType::New();
InputPointsContainerPointer myPoints = this->GetInput(0)->GetPoints();
InputPointsContainerIterator points = myPoints->Begin();
InputPointsContainerPointer myForces = m_Forces->GetPoints();
myForces->Reserve(m_NumberOfNodes);
InputPointsContainerIterator forces = myForces->Begin();
InputPointsContainerPointer myDerives = m_Derives->GetPoints();
myDerives->Reserve(m_NumberOfNodes);
InputPointsContainerIterator derives = myDerives->Begin();
InputPointsContainerPointer myDisplacements = m_Displacements->GetPoints();
myDisplacements->Reserve(m_NumberOfNodes);
InputPointsContainerIterator displacements = myDisplacements->Begin();
InputPointsContainerPointer myNormals = m_Normals->GetPoints();
myNormals->Reserve(m_NumberOfNodes);
InputPointsContainerIterator normals = myNormals->Begin();
InputPointsContainerPointer myLocations = m_Locations->GetPoints();
myLocations->Reserve(m_NumberOfNodes);
InputPointsContainerIterator locations = myLocations->Begin();
InputCellsContainerPointer myCells = this->GetInput(0)->GetCells();
InputCellsContainerIterator cells = myCells->Begin();
InputCellDataContainerPointer myCellData = this->GetInput(0)->GetCellData();
InputCellDataContainerIterator celldata = myCellData->Begin();
ImageSizeType ImageSize = m_Gradient->GetBufferedRegion().GetSize();
m_NumNewNodes = 0;
m_NewNodesExisted = 0;
m_NewNodeLimit = 200;
m_ObjectLabel = m_Potential->GetPixel(m_Center);
m_NewNodes = (float**) malloc(sizeof(float *)*m_NewNodeLimit);
for (unsigned int i = 0; i < m_NewNodeLimit; i++)
{
m_NewNodes[i] = 0;
}
//---------------------------------------------------------------------
//Get the image width/height and dePixelTypeh
//---------------------------------------------------------------------
m_ImageWidth = ImageSize[0];
m_ImageHeight = ImageSize[1];
float d[3] = {0,0,0};
itk::Point<float, 3> tmp;
// TimeStep = 0.001;
while( points != myPoints->End() )
{
locations.Value() = points.Value();
tmp = locations.Value();
++points;
++locations;
}
while( forces != myForces->End() )
{
forces.Value() = d;
++forces;
}
while( normals != myNormals->End() )
{
normals.Value() = d;
++normals;
}
for (unsigned int i=0; i+2 < m_NumberOfNodes; i++ )
{
m_Forces->SetPointData(i, 1.0);
m_Locations->SetPointData(i, 0.0);
m_Derives->SetPointData(i, 0.0);
m_Displacements->SetPointData(i, 0.0);
}
for (unsigned int j = 0; j < m_NewNodeLimit; j++)
{
m_NewNodes[j] = (float*) malloc(sizeof(float)*5);
}
while( derives != myDerives->End() )
{
derives.Value() = d;
++derives;
}
while( displacements != myDisplacements->End() )
{
displacements.Value() = d;
++displacements;
}
typename TriCell::CellAutoPointer insertCell;
unsigned long tripoints[3];
const unsigned long *tp;
float x;
for (unsigned int i=0; i<m_NumberOfCells; i++)
{
tp = cells.Value()->GetPointIds();
tripoints[0] = tp[0];
tripoints[1] = tp[1];
tripoints[2] = tp[2];
insertCell.TakeOwnership( new TriCell );
insertCell->SetPointIds(tripoints);
m_Locations->SetCell(i, insertCell);
x = celldata.Value();
m_Locations->SetCellData(i, (PixelType)x);
++cells;
++celldata;
}
// This prevents unnecessary re-executions of the pipeline.
OutputMeshPointer outputMesh = this->GetOutput();
outputMesh->SetBufferedRegion( outputMesh->GetRequestedRegion() );
}
/*
* set the stiffness matrix
*/
template <typename TInputMesh, typename TOutputMesh>
void
BalloonForceFilter<TInputMesh, TOutputMesh>
::SetStiffnessMatrix ()
{
InputCellDataContainerPointer myCellData = m_Locations->GetCellData();
InputCellDataContainerIterator celldata = myCellData->Begin();
if (m_K)
{
free (m_K);
}
m_K = (vnl_matrix_fixed<double,4,4>**) malloc(sizeof(vnl_matrix_fixed<double,4,4>*)*m_NumberOfCells);
float x;
float us = vnl_math::pi / 1;
float vs = 2.0*vnl_math::pi / m_Resolution;
float a = us*us, b = vs*vs;
float area = us*vs/2, k00, k01, k02, k11, k12, k22;
k00 = area * (m_Stiffness[1]/a + m_Stiffness[1]/b + m_Stiffness[0]);
k01 = area * (-m_Stiffness[1]/a + m_Stiffness[0]);
k02 = area * (-m_Stiffness[1]/b + m_Stiffness[0]);
k11 = area * (m_Stiffness[1]/a + m_Stiffness[0]);
k12 = area * m_Stiffness[0];
k22 = area * (m_Stiffness[1]/b + m_Stiffness[0]);
m_NStiffness[0][0] = k00;
m_NStiffness[0][1] = k01;
m_NStiffness[0][2] = k02;
m_NStiffness[0][3] = 0.0;
m_NStiffness[1][0] = k01;
m_NStiffness[1][1] = k11;
m_NStiffness[1][2] = k12;
m_NStiffness[1][3] = 0.0;
m_NStiffness[2][0] = k02;
m_NStiffness[2][1] = k12;
m_NStiffness[2][2] = k22;
m_NStiffness[2][3] = 0.0;
m_NStiffness[3][0] = 0.0;
m_NStiffness[3][1] = 0.0;
m_NStiffness[3][2] = 0.0;
m_NStiffness[3][3] = 1.0;
k00 = area * (m_Stiffness[1]/a + m_Stiffness[0]);
k01 = area * (-m_Stiffness[1]/a + m_Stiffness[0]);
k02 = area * m_Stiffness[0];
k11 = area * (m_Stiffness[1]/a + m_Stiffness[1]/b+m_Stiffness[0]);
k12 = area * (-m_Stiffness[1]/b + m_Stiffness[0]);
k22 = area * (m_Stiffness[1]/b + m_Stiffness[0]);
m_SStiffness[0][0] = k00;
m_SStiffness[0][1] = k01;
m_SStiffness[0][2] = k02;
m_SStiffness[0][3] = 0.0;
m_SStiffness[1][0] = k01;
m_SStiffness[1][1] = k11;
m_SStiffness[1][2] = k12;
m_SStiffness[1][3] = 0.0;
m_SStiffness[2][0] = k02;
m_SStiffness[2][1] = k12;
m_SStiffness[2][2] = k22;
m_SStiffness[2][3] = 0.0;
m_SStiffness[3][0] = 0.0;
m_SStiffness[3][1] = 0.0;
m_SStiffness[3][2] = 0.0;
m_SStiffness[3][3] = 1.0;
k00 = area * (m_Stiffness[1]/b + m_Stiffness[0]);
k01 = area * (-m_Stiffness[1]/b + m_Stiffness[0]);
k02 = area * m_Stiffness[0];
k11 = area * (m_Stiffness[1]/a + m_Stiffness[1]/b + m_Stiffness[0]);
k12 = area * (-m_Stiffness[1]/a + m_Stiffness[0]);
k22 = area * (m_Stiffness[1]/a + m_Stiffness[0]);
m_CStiffness[0][0] = k00;
m_CStiffness[0][1] = k01;
m_CStiffness[0][2] = k02;
m_CStiffness[0][3] = 0.0;
m_CStiffness[1][0] = k01;
m_CStiffness[1][1] = k11;
m_CStiffness[1][2] = k12;
m_CStiffness[1][3] = 0.0;
m_CStiffness[2][0] = k02;
m_CStiffness[2][1] = k12;
m_CStiffness[2][2] = k22;
m_CStiffness[2][3] = 0.0;
m_CStiffness[3][0] = 0.0;
m_CStiffness[3][1] = 0.0;
m_CStiffness[3][2] = 0.0;
m_CStiffness[3][3] = 1.0;
int j=0;
while (celldata != myCellData->End())
{
x = celldata.Value();
++celldata;
switch ((int)(x))
{
case 1:
m_K[j] = &m_SStiffness;
break;
case 2:
m_K[j] = &m_NStiffness;
break;
case 3:
m_K[j] = &m_CStiffness;
break;
}
++j;
}
}
/*
* compute force using the information from image
* and the balloon force. The calculation of the
* image force not included by far, it will be added
* when more experiments are done
*/
template <typename TInputMesh, typename TOutputMesh>
void
BalloonForceFilter<TInputMesh, TOutputMesh>
::ComputeForce()
{
unsigned int i;
IndexType coord; coord.Fill(0);
IndexType extend; extend.Fill(0);
float extends[2], fo, t, xs, ys;
FloatVector n1, n, vec1, vec2;
float max;
IPixelType x, y, z, f;
float dist = 0.0;
unsigned short label;
InputPointsContainerPointer Points = m_Locations->GetPoints();
InputPointsContainerIterator points = Points->Begin();
InputPointsContainerPointer myForces = m_Forces->GetPoints();
InputPointsContainerIterator forces = myForces->Begin();
InputPointsContainerPointer myNormals = m_Normals->GetPoints();
InputPointsContainerIterator normals = myNormals->Begin();
InputPointDataContainerPointer myForceData = m_Forces->GetPointData();
InputPointDataContainerIterator forcedata = myForceData->Begin();
InputPointDataContainerPointer myPointData = m_Locations->GetPointData();
InputPointDataContainerIterator pointstatus = myPointData->Begin();
i = 0;
while( i != m_NumberOfNodes - 2 )
{
xs = ys = 1.0;
x = points.Value();
coord[0] = (int) x[0];
coord[1] = (int) x[1];
label = (unsigned short)m_Potential->GetPixel(coord);
if ( label != m_ObjectLabel )
{
xs = ys = 0.0;
}
//---------------------------------------------------------------------
// The following part should be added if the input potential are only
// estimation of edges
//---------------------------------------------------------------------
/*
coord[0] = (int) (x[0]+1);
coord[1] = (int) (x[1]+1);
if ( m_Potential->GetPixel(coord) != m_ObjectLabel )
{
xs = ys = 0.0;
}
coord[0] = (int) (x[0]+1);
coord[1] = (int) (x[1]);
if ( m_Potential->GetPixel(coord) != m_ObjectLabel )
{
xs = ys = 0.0;
}
coord[0] = (int) (x[0]+1);
coord[1] = (int) (x[1]-1);
if ( m_Potential->GetPixel(coord) != m_ObjectLabel )
{
xs = ys = 0.0;
}
coord[0] = (int) (x[0]);
coord[1] = (int) (x[1]+1);
if ( m_Potential->GetPixel(coord) != m_ObjectLabel )
{
xs = ys = 0.0;
}
coord[0] = (int) (x[0]);
coord[1] = (int) (x[1]-1);
if ( m_Potential->GetPixel(coord) != m_ObjectLabel )
{
xs = ys = 0.0;
}
coord[0] = (int) (x[0]-1);
coord[1] = (int) (x[1]+1);
if ( m_Potential->GetPixel(coord) != m_ObjectLabel )
{
xs = ys = 0.0;
}
coord[0] = (int) (x[0]-1);
coord[1] = (int) (x[1]);
if ( m_Potential->GetPixel(coord) != m_ObjectLabel )
{
xs = ys = 0.0;
}
coord[0] = (int) (x[0]-1);
coord[1] = (int) (x[1]-1);
if ( m_Potential->GetPixel(coord) != m_ObjectLabel )
{
xs = ys = 0.0;
}
*/
extends[0] = x[0];
extends[1] = x[1];
// extends[2] = x[2];
extend[0] = (int) x[0];
extend[1] = (int) x[1];
// extend[2] = (int) x[2];
f = normals.Value();
max = vcl_abs(f[0]);
//---------------------------------------------------------------------
// all the movement in z direction is now disabled for further test
//---------------------------------------------------------------------
if ( vcl_abs(f[1]) > max ) max = vcl_abs(f[1]);
n[0] = f[0]/max;
n[1] = f[1]/max;
t = 0.0;
while (t < 5.0)
{
extends[0] += n[0];
extends[1] += n[1];
extend[0] = (int) extends[0];
extend[1] = (int) extends[1];
// extend[2] = 0;
if ( (extend[0] < 0) ||
(extend[1] < 0) ||
(static_cast<unsigned int>(extend[0]) >= m_ImageWidth) ||
(static_cast<unsigned int>(extend[1]) >= m_ImageHeight ) )
{
break;
}
label = (unsigned short) m_Potential->GetPixel(extend);
if ( label != m_ObjectLabel ) break;
t += 1.0;
}
dist = dist + t;
if (t < 2) pointstatus.Value() = 1.0;
else
{
pointstatus.Value() = 0.0;
// m_ImageOutput->SetPixel(coord, 1);
}
fo = sqrt(f[0]*f[0]+f[1]*f[1]);
f[0] = t*100*f[0]*xs/fo;
f[1] = t*100*f[1]*ys/fo;
f[2] = 0;
forces.Value() = f;
forcedata.Value() = 0.0;
++pointstatus;
++forces;
++forcedata;
++points;
++normals;
++i;
}
// m_DistanceToBoundary = dist/((float)(m_NumberOfNodes-2));
// if (m_DistanceToBoundary < m_DistanceForGradient) m_GradientBegin = 1;
}
/*
* compute the derivatives using d'- Kd = f
*/
template <typename TInputMesh, typename TOutputMesh>
void
BalloonForceFilter<TInputMesh, TOutputMesh>
::ComputeDt()
{
int i;
const unsigned long *tp;
InputCellsContainerPointer myCells = m_Locations->GetCells();
InputCellsContainerIterator cells = myCells->Begin();
InputPointsContainerPointer myForces = m_Forces->GetPoints();
InputPointsContainerIterator forces = myForces->Begin();
InputPointsContainerPointer myDerives = m_Derives->GetPoints();
InputPointsContainerIterator derives = myDerives->Begin();
float p = 1;
i = 0;
IPixelType v1, v2, v3;
IPixelType* v1_PixelType;
IPixelType* v2_PixelType;
IPixelType* v3_PixelType;
v1_PixelType = &v1;
v2_PixelType = &v2;
v3_PixelType = &v3;
while( cells != myCells->End() )
{
tp = cells.Value()->GetPointIds();
++cells;
m_Displacements->GetPoint (tp[0], v1_PixelType);
m_Displacements->GetPoint (tp[1], v2_PixelType);
m_Displacements->GetPoint (tp[2], v3_PixelType);
v1[0] *= m_K[i]->get(0, 0)*p;
v1[1] *= m_K[i]->get(0, 0)*p;
v1[2] *= m_K[i]->get(0, 0)*p;
v2[0] *= m_K[i]->get(0, 1)*p;
v2[1] *= m_K[i]->get(0, 1)*p;
v2[2] *= m_K[i]->get(0, 1)*p;
v3[0] *= m_K[i]->get(0, 2)*p;
v3[1] *= m_K[i]->get(0, 2)*p;
v3[2] *= m_K[i]->get(0, 2)*p;
v1[0] += v2[0]+v3[0];
v1[1] += v2[1]+v3[1];
v1[2] += v2[2]+v3[2];
m_Forces->GetPoint (tp[0], v2_PixelType);
v2[0] -= v1[0];
v2[1] -= v1[1];
v2[2] -= v1[2];
m_Forces->SetPoint (tp[0], v2);
m_Displacements->GetPoint (tp[0], v1_PixelType);
m_Displacements->GetPoint (tp[1], v2_PixelType);
m_Displacements->GetPoint (tp[2], v3_PixelType);
v1[0] *= m_K[i]->get(1, 0)*p;
v1[1] *= m_K[i]->get(1, 0)*p;
v1[2] *= m_K[i]->get(1, 0)*p;
v2[0] *= m_K[i]->get(1, 1)*p;
v2[1] *= m_K[i]->get(1, 1)*p;
v2[2] *= m_K[i]->get(1, 1)*p;
v3[0] *= m_K[i]->get(1, 2)*p;
v3[1] *= m_K[i]->get(1, 2)*p;
v3[2] *= m_K[i]->get(1, 2)*p;
v1[0] += v2[0]+v3[0];
v1[1] += v2[1]+v3[1];
v1[2] += v2[2]+v3[2];
m_Forces->GetPoint (tp[1], v2_PixelType);
v2[0] -= v1[0];
v2[1] -= v1[1];
v2[2] -= v1[2];
m_Forces->SetPoint (tp[1], v2);
m_Displacements->GetPoint (tp[0], v1_PixelType);
m_Displacements->GetPoint (tp[1], v2_PixelType);
m_Displacements->GetPoint (tp[2], v3_PixelType);
v1[0] *= m_K[i]->get(2, 0)*p;
v1[1] *= m_K[i]->get(2, 0)*p;
v1[2] *= m_K[i]->get(2, 0)*p;
v2[0] *= m_K[i]->get(2, 1)*p;
v2[1] *= m_K[i]->get(2, 1)*p;
v2[2] *= m_K[i]->get(2, 1)*p;
v3[0] *= m_K[i]->get(2, 2)*p;
v3[1] *= m_K[i]->get(2, 2)*p;
v3[2] *= m_K[i]->get(2, 2)*p;
v1[0] += v2[0]+v3[0];
v1[1] += v2[1]+v3[1];
v1[2] += v2[2]+v3[2];
m_Forces->GetPoint (tp[2], v2_PixelType);
v2[0] -= v1[0];
v2[1] -= v1[1];
v2[2] -= v1[2];
m_Forces->SetPoint (tp[2], v2);
++i;
}
while ( derives != myDerives->End() )
{
derives.Value() = forces.Value();
++derives;
++forces;
}
}
/*
* When there is new nodes added, must do a reset to reallocate
* the memory and redistribute the nodes and reconstruct the cells,
* now the mthod is only suitable for 2D models, it will be a much
* different case for 3D model
*/
template <typename TInputMesh, typename TOutputMesh>
void
BalloonForceFilter<TInputMesh, TOutputMesh>
::Reset()
{
int i, j, cell=0, slice, numnewnodes, res;
float status, d[3] = {0,0,0}, w;
IPixelType x, y, z;
IPixelType* x_PixelType;
IPixelType* y_PixelType;
x_PixelType = &x;
const unsigned long *tp;
unsigned long tripoints[3];
if (m_NumNewNodes == 0) return;
else cell = 1;
m_NumberOfNodes = m_NumberOfNodes + m_NumNewNodes;
m_NumberOfCells = m_NumberOfCells + m_NumNewNodes*2;
m_NumNewNodes = 0;
InputPointsContainerPointer myForces = m_Forces->GetPoints();
myForces->Reserve(m_NumberOfNodes);
InputPointsContainerIterator forces = myForces->Begin();
InputPointsContainerPointer myPoints = m_Locations->GetPoints();
myPoints->Reserve(m_NumberOfNodes);
InputPointsContainerIterator points = myPoints->Begin();
InputPointsContainerPointer myNormals = m_Normals->GetPoints();
myNormals->Reserve(m_NumberOfNodes);
InputPointsContainerIterator normals = myNormals->Begin();
InputPointsContainerPointer myDerives = m_Derives->GetPoints();
myDerives->Reserve(m_NumberOfNodes);
InputPointsContainerIterator derives = myDerives->Begin();
InputPointsContainerPointer myDisplacements = m_Displacements->GetPoints();
myDisplacements->Reserve(m_NumberOfNodes);
InputPointsContainerIterator displacements = myDisplacements->Begin();
InputPointDataContainerPointer myForceData = m_Forces->GetPointData();
InputPointDataContainerIterator forcedata = myForceData->Begin();
InputCellsContainerPointer myCells = m_Locations->GetCells();
myCells->Reserve(m_NumberOfCells);
InputCellsContainerIterator cells = myCells->Begin();
InputCellDataContainerPointer myCellData = m_Locations->GetCellData();
myCellData->Reserve(m_NumberOfCells);
InputCellDataContainerIterator celldata = myCellData->Begin();
InputCellsContainerPointer myOutCells = m_Output->GetCells();
myOutCells->Reserve(m_NumberOfCells);
InputCellsContainerIterator outcells = myOutCells->Begin();
InputCellDataContainerPointer myOutCellData = m_Output->GetCellData();
myOutCellData->Reserve(m_NumberOfCells);
InputCellDataContainerIterator outcelldata = myOutCellData->Begin();
typename TriCell::CellAutoPointer insertCell = new TriCell;
insertCell.TakeOwnership();
i = 0;
j = 0;
while (normals != myNormals->End())
{
if (i > (int) m_NewNodes[j][3])
{
z[0] = m_NewNodes[j][0];
z[1] = m_NewNodes[j][1];
z[2] = m_NewNodes[j][2];
j++;
normals.Value() = z;
}
else
{
x = points.Value();
i++;
normals.Value() = x;
++points;
}
++normals;
}
normals = myNormals->Begin();
points = myPoints->Begin();
while (points != myNormals->End())
{
points.Value() = normals.Value();
++points;
++normals;
}
while( forces != myForces->End() )
{
forces.Value() = d;
++forces;
}
while( derives != myDerives->End() )
{
derives.Value() = d;
++derives;
}
while( displacements != myDisplacements->End() )
{
displacements.Value() = d;
++displacements;
}
i = 0;
j = 0;
res = 0;
while ( outcells != myOutCells->End() )
{
tp = cells.Value()->GetPointIds();
if ( tp[0] > (unsigned long) m_NewNodes[j][3] )
{
}
else
{
outcells.Value() = cells.Value();
++cells;
++outcells;
outcells.Value() = cells.Value();
++cells;
++outcells;
}
i++;
if (tp[0] != tp[1] - 1)
{
res = i;
i = 0;
}
}
if (cell == 1)
{
int p = 0, jn;
// store cells containing the south pole nodes
for (int j=0; j<m_Resolution; j++)
{
jn = (j+1)%m_Resolution;
tripoints[0] = m_NumberOfNodes-2;
tripoints[1] = jn;
tripoints[2] = j;
insertCell->SetPointIds(tripoints);
m_Locations->SetCell(p, insertCell);
m_Locations->SetCellData(p, (PixelType)1.0);
p++;
insertCell.TakeOwnership( new TriCell );
}
// store cells containing the north pole nodes
for (int j=0; j<m_Resolution; j++)
{
jn = (j+1)%m_Resolution;
tripoints[2] = (1-1)*m_Resolution+j;
tripoints[1] = m_NumberOfNodes-1;
tripoints[0] = tripoints[2]-j+jn;
insertCell->SetPointIds(tripoints);
m_Locations->SetCell(p, insertCell);
m_Locations->SetCellData(p, (PixelType)2.0);
p++;
insertCell = TriCell::New();
}
m_NumberOfCells = p;
m_K = (vnl_matrix_fixed<double,4,4>**)
malloc(sizeof(vnl_matrix_fixed<double,4,4>*)*m_NumberOfCells);
InputCellDataContainerIterator celldata = m_Locations->GetCellData()->Begin();
int j=0;
while (celldata != m_Locations->GetCellData()->End())
{
w = celldata.Value();
++celldata;
switch ((int)(w))
{
case 1:
m_K[j] = &m_SStiffness;
break;
case 2:
m_K[j] = &m_NStiffness;
break;
case 3:
m_K[j] = &m_CStiffness;
break;
}
++j;
}
}
}
/*
* update the displacements using d_{new} = d_{old} + timestep*d'
*/
template <typename TInputMesh, typename TOutputMesh>
void
BalloonForceFilter<TInputMesh, TOutputMesh>
::Advance()
{
typename TInputMesh::PointType s, d, ds;
float dist=0.0;
int i;
InputPointsContainerPointer myDerives = m_Derives->GetPoints();
InputPointsContainerIterator derives = myDerives->Begin();
InputPointsContainerPointer myDisplacements = m_Displacements->GetPoints();
InputPointsContainerIterator displacements = myDisplacements->Begin();
InputPointsContainerPointer myPoints = m_Locations->GetPoints();
InputPointsContainerIterator points = myPoints->Begin();
i=0;
while( i < static_cast<int>(m_NumberOfNodes)-2 )
{
ds = derives.Value();
s = points.Value();
d = displacements.Value();
s[0] += m_TimeStep*ds[0];
s[1] += m_TimeStep*ds[1];
if ( m_GradientBegin )
{
d[0] += m_TimeStep*ds[0];
d[1] += m_TimeStep*ds[1];
}
else
{
d[0] = 0;
d[1] = 0;
}
/** do not update the displacements if the nodes is moving out of the image region. */
if ( (s[0] > 0) && (s[1] > 0) &&
(s[0] < m_ImageWidth) && (s[1] < m_ImageHeight) )
{
points.Value() = s;
displacements.Value() = d;
}
if ( m_GradientBegin )
{
dist += sqrt(ds[0]*ds[0]+ds[1]*ds[1])*m_TimeStep;
m_DistanceToBoundary = dist/((float)(m_NumberOfNodes-2));
}
i++;
++derives;
++points;
++displacements;
}
s[0] = 0;
}
/*
* copy the content of m_Location into output
*/
template <typename TInputMesh, typename TOutputMesh>
void
BalloonForceFilter<TInputMesh, TOutputMesh>
::ComputeOutput()
{
typename TriCell::CellAutoPointer insertCell;
unsigned long tripoints[3];
const unsigned long *tp;
double x;
m_Output = this->GetOutput();
OutputPointsContainerPointer myPoints = m_Output->GetPoints();
myPoints->Reserve(m_NumberOfNodes);
OutputPointsContainerIterator points = myPoints->Begin();
InputPointsContainerPointer myLocations = m_Locations->GetPoints();
InputPointsContainerIterator locations = myLocations->Begin();