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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.
*
*=========================================================================*/
#ifndef itkQuadEdgeMeshFunctionBase_h
#define itkQuadEdgeMeshFunctionBase_h
#include "itkObject.h"
#include "itkObjectFactory.h"
namespace itk
{
/**
* \class QuadEdgeMeshFunctionBase
* \ingroup QEMeshModifierFunctions
* \brief Base class for mesh function object modifiers.
*
* QuadEdgeMeshFunctionBase is the base class for itkQE function objects specialised
* in Mesh "small" (reduced in range) modification.
* Subclasses of itk::FunctionBase cannot modify their InputType since
* the signature of their Evaluate( const InputType& ) method guarantees it.
* Consider a method that modifies (the geometry, the connectivity or both)
* a mesh.
* For large modifications of this mesh we follow the classical itk Filter
* schema, which implies duplicating the mesh which can be space consuming.
* But for small modifications (think of the Euler operators) that an
* algorithm needs to apply many times, this systematic duplication can
* be daunting.
* QuadEdgeMeshFunctionBase thus offers a lightweight alternative to itk Filter.
* Subclasses of QuadEdgeMeshFunctionBase, which should override Evaluate(), are
* function objects that apply reduced and localised modifications
* (geometry, or connectivity) on the InputType mesh.
*
* This class is template over the mesh type (to be modified) and
* the output (usually a created/deleted vertex or face) type.
*
* \ingroup Functions
*
* \ingroup ITKQuadEdgeMesh
*/
template <typename TMesh, typename TOutput>
class QuadEdgeMeshFunctionBase : public Object
{
public:
ITK_DISALLOW_COPY_AND_MOVE(QuadEdgeMeshFunctionBase);
/** Standard class type aliases. */
using Self = QuadEdgeMeshFunctionBase;
using Superclass = Object;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(QuadEdgeMeshFunctionBase);
/** Mesh type that must be modified */
using MeshType = TMesh;
using EdgeCellType = typename MeshType::EdgeCellType;
/** Output type */
using OutputType = TOutput;
/** Set the mesh to be modified */
virtual void
SetInput(MeshType * input)
{
this->m_Mesh = input;
}
/** Evaluate at the specified input position */
// virtual OutputType Evaluate( )
// {
// return( (OutputType) 0 );
// }
protected:
QuadEdgeMeshFunctionBase() { m_Mesh = (MeshType *)nullptr; }
~QuadEdgeMeshFunctionBase() override = default;
private:
protected:
/** Mesh on which to apply the modification */
MeshType * m_Mesh{};
};
} // end namespace itk
#endif
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