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/*=========================================================================
*
* 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;
}
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