Examples/SpatialObjects/LandmarkSpatialObject.cxx

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 *  Copyright Insight Software Consortium
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 *  Licensed under the Apache License, Version 2.0 (the "License");
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// Software Guide : BeginLatex
//
// \index{itk::LandmarkSpatialObject}
//
// \doxygen{LandmarkSpatialObject} contains a list of
// \doxygen{SpatialObjectPoint}s which have a position and a color. Let's
// begin this example by including the appropriate header file.
//
// Software Guide : EndLatex

// Software Guide : BeginCodeSnippet
#include "itkLandmarkSpatialObject.h"
// Software Guide : EndCodeSnippet

int main( int , char *[] )
{
// Software Guide : BeginLatex
//
// LandmarkSpatialObject is templated over the dimension of the space.
//
// Here we create a 3-dimensional landmark.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
  using LandmarkType = itk::LandmarkSpatialObject<3>;
  using LandmarkPointer = LandmarkType::Pointer;
  using LandmarkPointType = LandmarkType::LandmarkPointType;
  using PointType = LandmarkType::PointType;

  LandmarkPointer landmark = LandmarkType::New();
// Software Guide : EndCodeSnippet
// Software Guide : BeginLatex
//
// Next, we set some properties of the object like its name and its
// identification number.
//
// Software Guide : EndLatex

// Software Guide : BeginCodeSnippet
  landmark->GetProperty().SetName("Landmark1");
  landmark->SetId(1);
// Software Guide : EndCodeSnippet

// Software Guide : BeginLatex
//
// We are now ready to add points into the landmark. We first
// create a list of SpatialObjectPoint and for each point we set the position
// and the color.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
  LandmarkType::LandmarkPointListType list;

  for (unsigned int i=0; i<5; ++i)
    {
    LandmarkPointType p;
    PointType pnt;
    pnt[0] = i;
    pnt[1] = i+1;
    pnt[2] = i+2;
    p.SetPositionInObjectSpace(pnt);
    p.SetColor(1,0,0,1);
    list.push_back(p);
    }
// Software Guide : EndCodeSnippet

// Software Guide : BeginLatex
//
// Then we add  the list to the object using the \code{SetPoints()} method.
// Calling \code{Update()} afterwards ensures that World Space representations
// are also updated to match changes in the SpatialObject's parameters.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
  landmark->SetPoints(list);
  landmark->Update();
// Software Guide : EndCodeSnippet

// Software Guide : BeginLatex
//
// The current point list can be accessed using the \code{GetPoints()} method.
// The method returns a reference to the (STL) list.
//
// Software Guide : EndLatex
// Software Guide : BeginCodeSnippet
  size_t nPoints = landmark->GetPoints().size();
  std::cout << "Number of Points in the landmark: " << nPoints << std::endl;

  LandmarkType::LandmarkPointListType::const_iterator it
    = landmark->GetPoints().begin();
  while(it != landmark->GetPoints().end())
    {
    std::cout << "Position: " << (*it).GetPositionInObjectSpace() << std::endl;
    std::cout << "Color: " << (*it).GetColor() << std::endl;
    ++it;
    }
// Software Guide : EndCodeSnippet

  return EXIT_SUCCESS;
}