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/*=========================================================================
*
* Copyright UMC Utrecht and contributors
*
* 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
*
* http://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.
*
*=========================================================================*/
#ifndef itkTransformixInputPointFileReader_h
#define itkTransformixInputPointFileReader_h
#include "itkMeshFileReaderBase.h"
#include <fstream>
namespace itk
{
/** \class TransformixInputPointFileReader
*
* \brief A reader that understands transformix input point files
*
* A reader that understands transformix input point files.
*
* The first word in the text file indicates whether the input points
* are given as an integer image index or as a point (world coordinates).
* If the file does not start with "index" or "point" it is assumed
* that the points are entered as indices, for compatibility with
* elastix versions < 3.503.
*
* The second word in the text file represents the number of points that
* should be read.
**/
template <class TOutputMesh>
class ITK_TEMPLATE_EXPORT TransformixInputPointFileReader : public MeshFileReaderBase<TOutputMesh>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(TransformixInputPointFileReader);
/** Standard class typedefs. */
using Self = TransformixInputPointFileReader;
using Superclass = MeshFileReaderBase<TOutputMesh>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(TransformixInputPointFileReader, MeshFileReaderBase);
/** Some convenient typedefs. */
using typename Superclass::DataObjectPointer;
using typename Superclass::OutputMeshType;
using typename Superclass::OutputMeshPointer;
/** Get whether the read points are indices; actually we should store this as a kind
* of meta data in the output, but i don't understand this concept yet...
*/
itkGetConstMacro(PointsAreIndices, bool);
/** Get the number of points that are defined in the file.
* In fact we also should store this somehow in the output dataobject,
* but that would mean resizing the point container, while still filled with
* invalid data (since the GetNumberOfPoints method in a PointSet returns the
* size of the point container. Storing as metadata would be another option.
* For now leave it like this. This is a little similar to the ImageIO classes.
* They also contain information about the image that they will read.
* For the Mesh readers I didn't choose for a MeshIO-design, but for a
* MeshReaderBase class and inheriting classes, so somehow it
* seems logic to store this kind of data in the inheriting reader classes.
*/
itkGetConstMacro(NumberOfPoints, unsigned long);
/** Prepare the allocation of the output mesh during the first back
* propagation of the pipeline. Updates the PointsAreIndices and NumberOfPoints.
*/
void
GenerateOutputInformation() override;
protected:
TransformixInputPointFileReader() = default;
~TransformixInputPointFileReader() override = default;
/** Fill the point container of the output. */
void
GenerateData() override;
private:
unsigned long m_NumberOfPoints{ 0 };
bool m_PointsAreIndices{ false };
std::ifstream m_Reader{};
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkTransformixInputPointFileReader.hxx"
#endif
#endif
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