You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
3 weeks ago
|
/*=========================================================================
|
||
|
|
|
||
|
|
Program: Visualization Toolkit
|
||
|
|
Module: vtkSPHCubicKernel.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 vtkSPHCubicKernel
|
||
|
|
* @brief a cubic SPH interpolation kernel
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* vtkSPHCubicKernel is an smooth particle hydrodynamics interpolation kernel as
|
||
|
|
* described by D.J. Price. This is a cubic formulation.
|
||
|
|
*
|
||
|
|
* @warning
|
||
|
|
* For more information see D.J. Price, Smoothed particle hydrodynamics and
|
||
|
|
* magnetohydrodynamics, J. Comput. Phys. 231:759-794, 2012. Especially
|
||
|
|
* equation 49.
|
||
|
|
*
|
||
|
|
* @par Acknowledgments:
|
||
|
|
* The following work has been generously supported by Altair Engineering
|
||
|
|
* and FluiDyna GmbH. Please contact Steve Cosgrove or Milos Stanic for
|
||
|
|
* more information.
|
||
|
|
*
|
||
|
|
* @sa
|
||
|
|
* vtkSPHKernel vtkSPHInterpolator
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef vtkSPHCubicKernel_h
|
||
|
|
#define vtkSPHCubicKernel_h
|
||
|
|
|
||
|
|
#include "vtkFiltersPointsModule.h" // For export macro
|
||
|
|
#include "vtkSPHKernel.h"
|
||
|
|
#include <algorithm> // For std::min()
|
||
|
|
|
||
|
|
class vtkIdList;
|
||
|
|
class vtkDoubleArray;
|
||
|
|
|
||
|
|
|
||
|
|
class VTKFILTERSPOINTS_EXPORT vtkSPHCubicKernel : public vtkSPHKernel
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
//@{
|
||
|
|
/**
|
||
|
|
* Standard methods for instantiation, obtaining type information, and printing.
|
||
|
|
*/
|
||
|
|
static vtkSPHCubicKernel *New();
|
||
|
|
vtkTypeMacro(vtkSPHCubicKernel,vtkSPHKernel);
|
||
|
|
void PrintSelf(ostream& os, vtkIndent indent);
|
||
|
|
//@}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Produce the computational parameters for the kernel. Invoke this method
|
||
|
|
* after setting initial values like SpatialStep.
|
||
|
|
*/
|
||
|
|
virtual void Initialize(vtkAbstractPointLocator *loc, vtkDataSet *ds,
|
||
|
|
vtkPointData *pd);
|
||
|
|
|
||
|
|
//@{
|
||
|
|
/**
|
||
|
|
* Compute weighting factor given a normalized distance from a sample point.
|
||
|
|
*/
|
||
|
|
virtual double ComputeFunctionWeight(const double d)
|
||
|
|
{
|
||
|
|
double tmp1 = 2.0 - std::min(d,2.0);
|
||
|
|
double tmp2 = 1.0 - std::min(d,1.0);
|
||
|
|
return (0.25*tmp1*tmp1*tmp1 - tmp2*tmp2*tmp2);
|
||
|
|
}
|
||
|
|
//@}
|
||
|
|
|
||
|
|
//@{
|
||
|
|
/**
|
||
|
|
* Compute weighting factor for derivative quantities given a normalized
|
||
|
|
* distance from a sample point.
|
||
|
|
*/
|
||
|
|
virtual double ComputeDerivWeight(const double d)
|
||
|
|
{
|
||
|
|
double tmp1 = 2.0 - std::min(d,2.0);
|
||
|
|
double tmp2 = 1.0 - std::min(d,1.0);
|
||
|
|
return (-0.75*tmp1*tmp1 + 3.0*tmp2*tmp2);
|
||
|
|
}
|
||
|
|
//@}
|
||
|
|
|
||
|
|
protected:
|
||
|
|
vtkSPHCubicKernel();
|
||
|
|
~vtkSPHCubicKernel();
|
||
|
|
|
||
|
|
private:
|
||
|
|
vtkSPHCubicKernel(const vtkSPHCubicKernel&) VTK_DELETE_FUNCTION;
|
||
|
|
void operator=(const vtkSPHCubicKernel&) VTK_DELETE_FUNCTION;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|