/*=========================================================================

*

* Copyright NumFOCUS

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* https://www.apache.org/licenses/LICENSE-2.0.txt

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*

*=========================================================================*/

// Software Guide : BeginLatex

//

// \index{itk::ReadWriteSpatialObject}

//

// Reading and writing SpatialObjects is a fairly simple task. The classes

// \doxygen{SpatialObjectReader} and \doxygen{SpatialObjectWriter} are used

// to read and write these objects, respectively. (Note these classes

// make use of the MetaIO auxiliary I/O routines and therefore have a

// \code{.meta} file suffix.)

//

// We begin this example by including the appropriate header files.

//

// Software Guide : EndLatex

// The following include to make Visual Studio 6 happy

#include "itkImageHelper.h"

// Software Guide : BeginCodeSnippet

#include "itkSpatialObjectReader.h"

#include "itkSpatialObjectWriter.h"

#include "itkEllipseSpatialObject.h"

// Software Guide : EndCodeSnippet

int

main(int, char *[])

{

// Software Guide : BeginLatex

//

// Next, we create a SpatialObjectWriter that is templated over the

// dimension of the object(s) we want to write.

//

// Software Guide : EndLatex

// Software Guide : BeginCodeSnippet

using WriterType = itk::SpatialObjectWriter<3>;

auto writer = WriterType::New();

// Software Guide : EndCodeSnippet

// Software Guide : BeginLatex

//

// For this example, we create an \doxygen{EllipseSpatialObject}.

//

// Software Guide : EndLatex

// Software Guide : BeginCodeSnippet

using EllipseType = itk::EllipseSpatialObject<3>;

auto ellipse = EllipseType::New();

ellipse->SetRadiusInObjectSpace(3);

// Software Guide : EndCodeSnippet

// Software Guide : BeginLatex

//

// Finally, we set to the writer the object to write using the

// \code{SetInput()} method and we set the name of the file with

// \code{SetFileName()} and call the \code{Update()} method to actually

// write the information.

//

// Software Guide : EndLatex

// Software Guide : BeginCodeSnippet

writer->SetInput(ellipse);

writer->SetFileName("ellipse.meta");

writer->Update();

// Software Guide : EndCodeSnippet

// Software Guide : BeginLatex

//

// Now we are ready to open the freshly created object. We first create a

// SpatialObjectReader which is also templated over the dimension of the

// object in the file. This means that the file should contain only objects

// with the same dimension.

//

// Software Guide : EndLatex

// Software Guide : BeginCodeSnippet

using ReaderType = itk::SpatialObjectReader<3>;

auto reader = ReaderType::New();

// Software Guide : EndCodeSnippet

// Software Guide : BeginLatex

//

// Next we set the name of the file to read using \code{SetFileName()} and

// we call the \code{Update()} method to read the file.

//

// Software Guide : EndLatex

// Software Guide : BeginCodeSnippet

reader->SetFileName("ellipse.meta");

reader->Update();

// Software Guide : EndCodeSnippet

// Software Guide : BeginLatex

//

// To get the objects in the file you can call the \code{GetGroup()} method.

// Calls to \code{GetGroup()} returns a pointer to a

// \doxygen{GroupSpatialObject}.

//

// Software Guide : EndLatex

// Software Guide : BeginCodeSnippet

ReaderType::GroupType * group = reader->GetGroup();

std::cout << "Number of objects in the group: ";

std::cout << group->GetNumberOfChildren() << std::endl;

// Software Guide : EndCodeSnippet

return EXIT_SUCCESS;

}