vtkImplicitFunction.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkImplicitFunction.h,v $

  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 __vtkImplicitFunction_h
#define __vtkImplicitFunction_h

#include "vtkObject.h"

class vtkAbstractTransform;

class VTK_COMMON_EXPORT vtkImplicitFunction : public vtkObject
{
public:
  vtkTypeRevisionMacro(vtkImplicitFunction,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);

  unsigned long GetMTime();


  double FunctionValue(const double x[3]);
  double FunctionValue(double x, double y, double z) {
    double xyz[3] = {x, y, z}; return this->FunctionValue(xyz); };


  void FunctionGradient(const double x[3], double g[3]);
  double *FunctionGradient(const double x[3]) {
    this->FunctionGradient(x,this->ReturnValue);
    return this->ReturnValue; };
  double *FunctionGradient(double x, double y, double z) {
    double xyz[3] = {x, y, z}; return this->FunctionGradient(xyz); };


  virtual void SetTransform(vtkAbstractTransform*);
  virtual void SetTransform(double elements[16]);
  vtkGetObjectMacro(Transform,vtkAbstractTransform);


  virtual double EvaluateFunction(double x[3]) = 0;
  double EvaluateFunction(double x, double y, double z) {
    double xyz[3] = {x, y, z}; return this->EvaluateFunction(xyz); };

  virtual void EvaluateGradient(double x[3], double g[3]) = 0;

protected:
  vtkImplicitFunction();
  ~vtkImplicitFunction();

  vtkAbstractTransform *Transform;
  double ReturnValue[3];
private:
  vtkImplicitFunction(const vtkImplicitFunction&);  // Not implemented.
  void operator=(const vtkImplicitFunction&);  // Not implemented.
};

#endif

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