---

Common/vtkIdentityTransform.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkIdentityTransform.h,v $
  Language:  C++

  Copyright (c) 1993-2002 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 __vtkIdentityTransform_h
#define __vtkIdentityTransform_h

#include "vtkLinearTransform.h"

class VTK_COMMON_EXPORT vtkIdentityTransform : public vtkLinearTransform
{
public:
  static vtkIdentityTransform *New();

  vtkTypeRevisionMacro(vtkIdentityTransform,vtkLinearTransform);
  void PrintSelf(ostream& os, vtkIndent indent);

  void TransformPoints(vtkPoints *inPts, vtkPoints *outPts);

  void TransformNormals(vtkDataArray *inNms, vtkDataArray *outNms);

  void TransformVectors(vtkDataArray *inVrs, vtkDataArray *outVrs);


  void TransformPointsNormalsVectors(vtkPoints *inPts, 
                                     vtkPoints *outPts, 
                                     vtkDataArray *inNms, 
                                     vtkDataArray *outNms,
                                     vtkDataArray *inVrs, 
                                     vtkDataArray *outVrs);

  // Invert the transformation.  This doesn't do anything to the 
  // identity transformation.
  void Inverse() {};


  void InternalTransformPoint(const float in[3], float out[3]);
  void InternalTransformPoint(const double in[3], double out[3]);


  void InternalTransformNormal(const float in[3], float out[3]);
  void InternalTransformNormal(const double in[3], double out[3]);


  void InternalTransformVector(const float in[3], float out[3]);
  void InternalTransformVector(const double in[3], double out[3]);


  void InternalTransformDerivative(const float in[3], float out[3],
                                   float derivative[3][3]);
  void InternalTransformDerivative(const double in[3], double out[3],
                                   double derivative[3][3]);

  vtkAbstractTransform *MakeTransform();

protected:
  vtkIdentityTransform();
  ~vtkIdentityTransform();

  void InternalDeepCopy(vtkAbstractTransform *t);

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

#endif

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