vtkPolyDataNormals.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkPolyDataNormals.h
 
  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
 
     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.
 
=========================================================================*/
#ifndef vtkPolyDataNormals_h
#define vtkPolyDataNormals_h
 
#include "vtkFiltersCoreModule.h" // For export macro
#include "vtkPolyDataAlgorithm.h"
 
class vtkFloatArray;
class vtkIdList;
class vtkPolyData;
 
class VTKFILTERSCORE_EXPORT vtkPolyDataNormals : public vtkPolyDataAlgorithm
{
public:
  vtkTypeMacro(vtkPolyDataNormals, vtkPolyDataAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  static vtkPolyDataNormals* New();
 
 
  vtkSetClampMacro(FeatureAngle, double, 0.0, 180.0);
  vtkGetMacro(FeatureAngle, double);
 
 
  vtkSetMacro(Splitting, vtkTypeBool);
  vtkGetMacro(Splitting, vtkTypeBool);
  vtkBooleanMacro(Splitting, vtkTypeBool);
 
 
  vtkSetMacro(Consistency, vtkTypeBool);
  vtkGetMacro(Consistency, vtkTypeBool);
  vtkBooleanMacro(Consistency, vtkTypeBool);
 
 
  vtkSetMacro(AutoOrientNormals, vtkTypeBool);
  vtkGetMacro(AutoOrientNormals, vtkTypeBool);
  vtkBooleanMacro(AutoOrientNormals, vtkTypeBool);
 
 
  vtkSetMacro(ComputePointNormals, vtkTypeBool);
  vtkGetMacro(ComputePointNormals, vtkTypeBool);
  vtkBooleanMacro(ComputePointNormals, vtkTypeBool);
 
 
  vtkSetMacro(ComputeCellNormals, vtkTypeBool);
  vtkGetMacro(ComputeCellNormals, vtkTypeBool);
  vtkBooleanMacro(ComputeCellNormals, vtkTypeBool);
 
 
  vtkSetMacro(FlipNormals, vtkTypeBool);
  vtkGetMacro(FlipNormals, vtkTypeBool);
  vtkBooleanMacro(FlipNormals, vtkTypeBool);
 
 
  vtkSetMacro(NonManifoldTraversal, vtkTypeBool);
  vtkGetMacro(NonManifoldTraversal, vtkTypeBool);
  vtkBooleanMacro(NonManifoldTraversal, vtkTypeBool);
 
 
  vtkSetClampMacro(OutputPointsPrecision, int, SINGLE_PRECISION, DEFAULT_PRECISION);
  vtkGetMacro(OutputPointsPrecision, int);
 
protected:
  vtkPolyDataNormals();
  ~vtkPolyDataNormals() override = default;
 
  // Usual data generation method
  int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
 
  double FeatureAngle;
  vtkTypeBool Splitting;
  vtkTypeBool Consistency;
  vtkTypeBool FlipNormals;
  vtkTypeBool AutoOrientNormals;
  vtkTypeBool NonManifoldTraversal;
  vtkTypeBool ComputePointNormals;
  vtkTypeBool ComputeCellNormals;
  int NumFlips;
  int OutputPointsPrecision;
 
private:
  vtkIdList* Wave;
  vtkIdList* Wave2;
  vtkIdList* CellIds;
  vtkIdList* CellPoints;
  vtkIdList* NeighborPoints;
  vtkIdList* Map;
  vtkPolyData* OldMesh;
  vtkPolyData* NewMesh;
  int* Visited;
  vtkFloatArray* PolyNormals;
  double CosAngle;
 
  // Uses the list of cell ids (this->Wave) to propagate a wave of
  // checked and properly ordered polygons.
  void TraverseAndOrder(void);
 
  // Check the point id give to see whether it lies on a feature
  // edge. If so, split the point (i.e., duplicate it) to topologically
  // separate the mesh.
  void MarkAndSplit(vtkIdType ptId);
 
private:
  vtkPolyDataNormals(const vtkPolyDataNormals&) = delete;
  void operator=(const vtkPolyDataNormals&) = delete;
};
 
#endif