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

  Program:   Visualization Toolkit
  Module:    vtkVoxelModeller.h
  Language:  C++
  Date:      $Date$
  Version:   $Revision$


Copyright (c) 1993-2001 Ken Martin, Will Schroeder, Bill Lorensen 
All rights reserved.

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 * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
   of any contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.

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=========================================================================*/
// .NAME vtkVoxelModeller - convert an arbitrary dataset to a voxel representation
// .SECTION Description
// vtkVoxelModeller is a filter that converts an arbitrary data set to a
// structured point (i.e., voxel) representation. It is very similar to 
// vtkImplicitModeller, except that it doesn't record distance; instead it
// records occupancy. As such, it stores its results in the more compact
// form of 0/1 bits.
// .SECTION see also
// vtkImplicitModeller

#ifndef __vtkVoxelModeller_h
#define __vtkVoxelModeller_h

#include "vtkDataSetToStructuredPointsFilter.h"

class VTK_IMAGING_EXPORT vtkVoxelModeller : public vtkDataSetToStructuredPointsFilter 
{
public:
  vtkTypeMacro(vtkVoxelModeller,vtkDataSetToStructuredPointsFilter);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Construct an instance of vtkVoxelModeller with its sample dimensions
  // set to (50,50,50), and so that the model bounds are
  // automatically computed from its input. The maximum distance is set to 
  // examine the whole grid. This could be made much faster, and probably
  // will be in the future.
  static vtkVoxelModeller *New();

  // Description:
  // Compute the ModelBounds based on the input geometry.
  float ComputeModelBounds(float origin[3], float ar[3]);

  // Description:
  // Set the i-j-k dimensions on which to sample the distance function.
  void SetSampleDimensions(int i, int j, int k);

  // Description:
  // Set the i-j-k dimensions on which to sample the distance function.
  void SetSampleDimensions(int dim[3]);
  vtkGetVectorMacro(SampleDimensions,int,3);

  // Description:
  // Specify distance away from surface of input geometry to sample. Smaller
  // values make large increases in performance.
  vtkSetClampMacro(MaximumDistance,float,0.0,1.0);
  vtkGetMacro(MaximumDistance,float);

  // Description:
  // Specify the position in space to perform the voxelization.
  void SetModelBounds(float bounds[6]);
  void SetModelBounds(float xmin, float xmax, float ymin, float ymax, float zmin, float zmax);
  vtkGetVectorMacro(ModelBounds,float,6);

  // Description:
  // The the volume out to a specified filename.
  void Write(char *);

protected:
  vtkVoxelModeller();
  ~vtkVoxelModeller() {};

  void Execute();
  int SampleDimensions[3];
  float MaximumDistance;
  float ModelBounds[6];
private:
  vtkVoxelModeller(const vtkVoxelModeller&);  // Not implemented.
  void operator=(const vtkVoxelModeller&);  // Not implemented.
};

#endif
