/*=========================================================================

  Program:   VMTK
  Module:    $RCSfile: vtkvmtkPolyBallLine2.h,v $
  Language:  C++
  Date:      $$
  Version:   $$

  Copyright (c) Luca Antiga, David Steinman. All rights reserved.
  See LICENCE file for details.

  Portions of this code are covered under the VTK copyright.
  See VTKCopyright.txt or http://www.kitware.com/VTKCopyright.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 notices for more information.
  
  Note: this class was contributed by 
	Tangui Morvan
	Kalkulo AS
	Simula Research Laboratory
=========================================================================*/
  // .NAME vtkvmtkPolyBallLine2 - 
  // .SECTION Description
  // This is another version of a polyball line
  // Here the ditance to the line is first computed and then the radius at the closest point is substracted
  // This way each line segment only influences its voronoi cell

#ifndef __vtkvmtkPolyBallLine2_h
#define __vtkvmtkPolyBallLine2_h

#include "vtkImplicitFunction.h"
#include "vtkPolyData.h"
#include "vtkIdList.h"
#include "vtkTriangleFilter.h"
#include "vtkCellLocator.h"

//#include "vtkvmtkComputationalGeometryWin32Header.h"
#include "vtkvmtkWin32Header.h"

class VTK_VMTK_CONTRIB_EXPORT vtkvmtkPolyBallLine2 : public vtkImplicitFunction
{
  public:

  static vtkvmtkPolyBallLine2 *New();
  vtkTypeMacro(vtkvmtkPolyBallLine2,vtkImplicitFunction);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description
  // Evaluate polyball.
  double EvaluateFunction(double x[3]);
  double EvaluateFunction(double x, double y, double z)
  {return this->vtkImplicitFunction::EvaluateFunction(x, y, z); } ;

  // Description
  // Evaluate polyball gradient.
  void EvaluateGradient(double x[3], double n[3]);

  // Description:
  // Set / get input poly data.
  virtual void SetInput(vtkPolyData *inp);
  vtkGetObjectMacro(Input,vtkPolyData);

  // Description:
  // Set / get input cell ids used for the function.
  virtual void SetInputCellIds(vtkIdList *cellIds);
  vtkGetObjectMacro(InputCellIds,vtkIdList);

  // Description:
  // Set / get a single input cell id used for the function.
  virtual void SetInputCellId(vtkIdType cellId);
  vtkGetMacro(InputCellId,vtkIdType);

  // Description:
  // Set / get poly ball radius array name.
  vtkSetStringMacro(PolyBallRadiusArrayName);
  vtkGetStringMacro(PolyBallRadiusArrayName);

  vtkSetMacro(UseRadiusInformation,int);
  vtkGetMacro(UseRadiusInformation,int);
  vtkBooleanMacro(UseRadiusInformation,int);

  static double ComplexDot(double x[4], double y[4]);

  protected:
  vtkvmtkPolyBallLine2();
  ~vtkvmtkPolyBallLine2();

  vtkPolyData* Input;
  vtkIdList* InputCellIds;
  vtkIdType InputCellId;

  char* PolyBallRadiusArrayName;
  vtkIdType LastPolyBallCellId;
  vtkIdType LastPolyBallCellSubId;
  double LastPolyBallCellPCoord;
  double LastPolyBallCenter[3];
  double LastPolyBallCenterRadius;

  int UseRadiusInformation;
  
  // Used to triangulate the polylines
  vtkTriangleFilter *Triangulator;
  
  //For faster distance computation
  vtkCellLocator *Locator;
  
  //Local copy of the cells used in the input
  vtkPolyData *LocalInput;
  
  //Triangulated input (for increased performance)
  vtkPolyData *TriangulatedInput;
  
  //Should the locator be rebuild
  bool ShouldBuildLocator;
  
  //MTime of input last time the locator was built
  unsigned long LocatorMTime;
  
  //Rebuild the locator
  void BuildLocator();

  private:
  vtkvmtkPolyBallLine2(const vtkvmtkPolyBallLine2&);  // Not implemented.
  void operator=(const vtkvmtkPolyBallLine2&);  // Not implemented.
};

#endif


