ITK  5.4.0 Insight Toolkit
Examples/SpatialObjects/TubeSpatialObject.cxx
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// Software Guide : BeginLatex
//
// \index{itk::TubeSpatialObject}
//
// \doxygen{TubeSpatialObject} defines an n-dimensional tube. A tube is
// defined as a list of centerline points which have a position, a radius,
// some normals and other properties. Let's start by including the
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
// Software Guide : EndCodeSnippet
int
main(int, char *[])
{
// Software Guide : BeginLatex
//
// TubeSpatialObject is templated over the dimension of the space. A
// TubeSpatialObject contains a list of TubeSpatialObjectPoints.
//
// First we define some type definitions and we create the tube.
//
// Software Guide : EndLatex
unsigned int i;
// Software Guide : BeginCodeSnippet
using TubeType = itk::TubeSpatialObject<3>;
using TubePointer = TubeType::Pointer;
using TubePointType = TubeType::TubePointType;
using CovariantVectorType = TubePointType::CovariantVectorType;
TubePointer tube = TubeType::New();
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// We create a point list and we set:
// \begin{enumerate}
// \item The position of each point in the local coordinate system using the
// \code{SetPositionInObjectSpace()} method.
// \item The radius of the tube at this position using
// \item The two normals at the tube is set using
// \code{SetNormal1InObjectSpace()} and
// \code{SetNormal2InObjectSpace()}.
// \item The color of the point is set to red in our case.
// \end{enumerate}
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
TubeType::TubePointListType list;
for (i = 0; i < 5; ++i)
{
TubePointType p;
PointType pnt;
pnt[0] = i;
pnt[1] = i + 1;
pnt[2] = i + 2;
p.SetPositionInObjectSpace(pnt);
CovariantVectorType normal1;
CovariantVectorType normal2;
for (unsigned int j = 0; j < 3; ++j)
{
normal1[j] = j;
normal2[j] = j * 2;
}
p.SetNormal1InObjectSpace(normal1);
p.SetNormal2InObjectSpace(normal2);
p.SetColor(1, 0, 0, 1);
list.push_back(p);
}
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// Next, we create the tube and set its name using \code{SetName()}. We also
// set its identification number with \code{SetId()} and, at the end, we add
// the list of points previously created.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
tube->GetProperty().SetName("Tube1");
tube->SetId(1);
tube->SetPoints(list);
tube->Update();
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// The \code{GetPoints()} method return a reference to the internal list of
// points of the object.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
TubeType::TubePointListType pointList = tube->GetPoints();
std::cout << "Number of points representing the tube: ";
std::cout << pointList.size() << std::endl;
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// The \code{ComputeTangentAndNormals()} function computes the normals and
// the tangent for each point using finite differences.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
tube->ComputeTangentsAndNormals();
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// Then we can access the points using STL iterators.
// \code{GetPositionInObjectSpace()}
// and \code{GetColor()} functions return respectively the position and the
// that point. \code{GetNormal1InObjectSpace()} and
// \code{GetNormal2InObjectSpace()} functions return a
// \doxygen{CovariantVector} and \code{GetTangentInObjectSpace()} returns a
// \doxygen{Vector}.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
TubeType::TubePointListType::const_iterator it = tube->GetPoints().begin();
i = 0;
while (it != tube->GetPoints().end())
{
std::cout << std::endl;
std::cout << "Point #" << i << std::endl;
std::cout << "Position: " << (*it).GetPositionInObjectSpace()
<< std::endl;
std::cout << "Tangent: " << (*it).GetTangentInObjectSpace() << std::endl;
std::cout << "First Normal: " << (*it).GetNormal1InObjectSpace()
<< std::endl;
std::cout << "Second Normal: " << (*it).GetNormal2InObjectSpace()
<< std::endl;
std::cout << "Color = " << (*it).GetColor() << std::endl;
it++;
i++;
}
// Software Guide : EndCodeSnippet
return EXIT_SUCCESS;
}
Pointer
SmartPointer< Self > Pointer