itkNormalQuadEdgeMeshFilter.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  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 __itkNormalQuadEdgeMeshFilter_h
#define __itkNormalQuadEdgeMeshFilter_h

#include "itkQuadEdgeMeshToQuadEdgeMeshFilter.h"
#include "itkQuadEdgeMeshPolygonCell.h"
#include "itkTriangleHelper.h"

namespace itk
{
template< typename TInputMesh, typename TOutputMesh >
class NormalQuadEdgeMeshFilter:
  public QuadEdgeMeshToQuadEdgeMeshFilter< TInputMesh, TOutputMesh >
{
public:
  typedef NormalQuadEdgeMeshFilter                                    Self;
  typedef QuadEdgeMeshToQuadEdgeMeshFilter< TInputMesh, TOutputMesh > Superclass;
  typedef SmartPointer< Self >                                        Pointer;
  typedef SmartPointer< const Self >                                  ConstPointer;

  itkNewMacro (Self);

  itkTypeMacro (NormalQuadEdgeMeshFilter,
                QuadEdgeMeshToQuadEdgeMeshFilter);

  typedef TInputMesh                              InputMeshType;
  typedef typename InputMeshType::Pointer         InputMeshPointer;
  typedef typename InputMeshType::PointIdentifier InputPointIdentifier;
  typedef typename InputMeshType::PointType       InputPointType;
  typedef typename InputMeshType::VectorType      InputVectorType;
  typedef typename InputMeshType::QEType          InputQEType;

  typedef TOutputMesh                                          OutputMeshType;
  typedef typename OutputMeshType::Pointer                     OutputMeshPointer;
  typedef typename OutputMeshType::PointType                   OutputPointType;
  typedef typename OutputPointType::VectorType                 OutputVectorType;
  typedef typename OutputMeshType::QEType                      OutputQEType;
  typedef typename OutputMeshType::PointIdentifier             OutputPointIdentifier;
  typedef typename OutputMeshType::PointIdIterator             OutputPointIdIterator;
  typedef typename OutputMeshType::PointsContainerPointer      OutputPointsContainerPointer;
  typedef typename OutputMeshType::PointsContainerIterator     OutputPointsContainerIterator;
  typedef typename OutputMeshType::CellType                    OutputCellType;
  typedef typename OutputMeshType::CellIdentifier              OutputCellIdentifier;
  typedef typename OutputMeshType::CellAutoPointer             OutputCellAutoPointer;
  typedef typename OutputMeshType::CellsContainerConstIterator OutputCellsContainerPointer;
  typedef typename OutputMeshType::CellsContainerConstIterator OutputCellsContainerConstIterator;

  typedef TriangleHelper< OutputPointType > TriangleType;

  typedef QuadEdgeMeshPolygonCell< OutputCellType >   OutputPolygonType;
  typedef typename OutputPolygonType::SelfAutoPointer OutputPolygonAutoPointer;

  typedef typename OutputMeshType::CellDataContainer  OutputCellDataContainer;
  typedef typename OutputMeshType::PointDataContainer OutputPointDataContainer;

  typedef typename OutputMeshType::MeshTraits        OutputMeshTraits;
  typedef typename OutputMeshTraits::PixelType       OutputVertexNormalType;
  typedef typename OutputVertexNormalType::ValueType OutputVertexNormalComponentType;

  typedef typename OutputMeshTraits::CellPixelType OutputFaceNormalType;
  typedef typename OutputFaceNormalType::ValueType OutputFaceNormalComponentType;

  enum WeightType {
    GOURAUD = 0, // Uniform weights
    THURMER,     // Angle on a triangle at the given vertex
    AREA
    };

  itkSetMacro (Weight, WeightType);
  itkGetConstMacro (Weight, WeightType);

protected:
  NormalQuadEdgeMeshFilter();
  ~NormalQuadEdgeMeshFilter();
  void PrintSelf(std::ostream & os, Indent indent) const;

  WeightType m_Weight;

  OutputFaceNormalType ComputeFaceNormal(OutputPolygonType *iPoly);

  void ComputeAllFaceNormals();

  void ComputeAllVertexNormals();

  OutputVertexNormalType ComputeVertexNormal(const OutputPointIdentifier & iId, OutputMeshType *outputMesh);

  OutputVertexNormalComponentType Weight(const OutputPointIdentifier & iPId,
                                         const OutputCellIdentifier & iCId,
                                         OutputMeshType *outputMesh);

  void GenerateData();

private:
  NormalQuadEdgeMeshFilter (const Self &);
  void operator=(const Self &);
};
}

#include "itkNormalQuadEdgeMeshFilter.hxx"
#endif