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/*=========================================================================
Program: Visualization Toolkit
Module: vtkImplicitDataSet.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.
=========================================================================*/
/**
* @class vtkImplicitDataSet
* @brief treat a dataset as if it were an implicit function
*
* vtkImplicitDataSet treats any type of dataset as if it were an
* implicit function. This means it computes a function value and
* gradient. vtkImplicitDataSet is a concrete implementation of
* vtkImplicitFunction.
*
* vtkImplicitDataSet computes the function (at the point x) by performing
* cell interpolation. That is, it finds the cell containing x, and then
* uses the cell's interpolation functions to compute an interpolated
* scalar value at x. (A similar approach is used to find the
* gradient, if requested.) Points outside of the dataset are assigned
* the value of the ivar OutValue, and the gradient value OutGradient.
*
* @warning
* Any type of dataset can be used as an implicit function as long as it
* has scalar data associated with it.
*
* @sa
* vtkImplicitFunction vtkImplicitVolume vtkClipPolyData vtkCutter
* vtkImplicitWindowFunction
*/
#ifndef vtkImplicitDataSet_h
#define vtkImplicitDataSet_h
#include "vtkCommonDataModelModule.h" // For export macro
#include "vtkImplicitFunction.h"
class vtkDataSet;
class VTKCOMMONDATAMODEL_EXPORT vtkImplicitDataSet : public vtkImplicitFunction
{
public:
vtkTypeMacro(vtkImplicitDataSet, vtkImplicitFunction);
void PrintSelf(ostream& os, vtkIndent indent) override;
/**
* Construct an vtkImplicitDataSet with no initial dataset; the OutValue
* set to a large negative number; and the OutGradient set to (0,0,1).
*/
static vtkImplicitDataSet* New();
/**
* Return the MTime also considering the DataSet dependency.
*/
vtkMTimeType GetMTime() override;
//@{
/**
* Evaluate the implicit function. This returns the interpolated scalar value
* at x[3].
*/
using vtkImplicitFunction::EvaluateFunction;
double EvaluateFunction(double x[3]) override;
//@}
/**
* Evaluate implicit function gradient.
*/
void EvaluateGradient(double x[3], double n[3]) override;
//@{
/**
* Set / get the dataset used for the implicit function evaluation.
*/
virtual void SetDataSet(vtkDataSet*);
vtkGetObjectMacro(DataSet, vtkDataSet);
//@}
//@{
/**
* Set / get the function value to use for points outside of the dataset.
*/
vtkSetMacro(OutValue, double);
vtkGetMacro(OutValue, double);
//@}
//@{
/**
* Set / get the function gradient to use for points outside of the dataset.
*/
vtkSetVector3Macro(OutGradient, double);
vtkGetVector3Macro(OutGradient, double);
//@}
protected:
vtkImplicitDataSet();
~vtkImplicitDataSet() override;
void ReportReferences(vtkGarbageCollector*) override;
vtkDataSet* DataSet;
double OutValue;
double OutGradient[3];
double* Weights; // used to compute interpolation weights
int Size; // keeps track of length of weights array
private:
vtkImplicitDataSet(const vtkImplicitDataSet&) = delete;
void operator=(const vtkImplicitDataSet&) = delete;
};
#endif
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