vtkImplicitFunction.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkImplicitFunction.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 vtkImplicitFunction_h
#define vtkImplicitFunction_h
 
#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkObject.h"
 
class vtkDataArray;
 
class vtkAbstractTransform;
 
class VTKCOMMONDATAMODEL_EXPORT vtkImplicitFunction : public vtkObject
{
public:
  vtkTypeMacro(vtkImplicitFunction, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  vtkMTimeType GetMTime() override;
 
 
  virtual void FunctionValue(vtkDataArray* input, vtkDataArray* output);
  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]) VTK_SIZEHINT(3)
  {
    this->FunctionGradient(x, this->ReturnValue);
    return this->ReturnValue;
  }
  double* FunctionGradient(double x, double y, double z) VTK_SIZEHINT(3)
  {
    double xyz[3] = { x, y, z };
    return this->FunctionGradient(xyz);
  }
 
 
  virtual void SetTransform(vtkAbstractTransform*);
  virtual void SetTransform(const double elements[16]);
  vtkGetObjectMacro(Transform, vtkAbstractTransform);
 
 
  virtual double EvaluateFunction(double x[3]) = 0;
  virtual void EvaluateFunction(vtkDataArray* input, vtkDataArray* output);
  virtual 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() override;
 
  vtkAbstractTransform* Transform;
  double ReturnValue[3];
 
private:
  vtkImplicitFunction(const vtkImplicitFunction&) = delete;
  void operator=(const vtkImplicitFunction&) = delete;
};
 
#endif